Three-gear damping and floating valve group

Abstract

The utility model provides a three-gear damping and floating valve group. The three-gear damping and floating valve group comprises an integrated valve block 1, a balance valve 2, a damping floating oil supplementing electromagnetic valve 3, a floating electromagnetic valve 4, a heavy-load damping valve 5, a light-load damping valve 6, a heavy-load energy accumulator 7 and a light-load energy accumulator 8, the three-gear damping and floating valve group comprises a V port, a T port, a C1 port and a C2 port, the V port can be connected with a B1 port of the multi-way valve, the T port can be connected with an oil tank of the loading machine, the C1 port can be connected with a rodless cavity of a large arm lifting oil cylinder of the loading machine, and the C2 port can be connected with a rod cavity of the large arm lifting oil cylinder of the loading machine. According to the three-gear damping and floating valve group, the damping control function and the floating function of the large arm of the loading machine are integrated on one valve group, high integration is achieved, pipeline connection is facilitated, and the installation space is reduced. The valve group can realize the driving safety, comfort and reasonable and convenient operation of the loading machine, and realizes the multidirectional lifting of the driving and operation of the loading machine.

Description

Technical Field

[0001] The utility model relates to a valve group technology, in particular to a three-speed shock-absorbing and floating valve group. Background Art

[0002] The conventional shock-absorbing valve group cannot adjust the shock-absorbing function when the loader is driving, whether it is heavy-loaded or light-loaded. However, due to the uneven road surface, the shock-absorbing effect will be different when the loader is heavy-loaded and light-loaded, resulting in poor driving comfort. When the loader is turned off, the raised bucket arm cannot land. The disadvantages of the conventional shock-absorbing valve group structure are: 1. A conventional shock-absorbing valve group is installed between the loader arm lifting cylinder and the multi-way valve. The shock-absorbing amplitude varies with the load of the loader. When the loader is driving on uneven roads, the loader as a whole will also shake. 2. After the loader is turned off, it cannot fall due to the lack of a pilot oil source. The bucket arm can only be landed after it is started.

[0003] With the rapid development of the engineering vehicle industry, the requirements for driving comfort and safety of loaders are getting higher and higher. It is imperative to develop a new type of three-speed shock absorption and floating valve group to achieve driving safety, comfort and rational and convenient operation of the loader to achieve all-round improvement of loader driving and operation. Utility Model Content

[0004] The purpose of the utility model is to propose a three-speed damping and floating valve group in response to the increasingly high requirements for driving comfort and safety of loaders. The valve group integrates the large arm damping control function and floating function of the loader on one valve group, achieving high integration, facilitating pipeline connection, and reducing installation space. The valve group can achieve driving safety, comfort, and rational and convenient operation of the loader, and realize all-round improvement of the loader's driving and operation.

[0005] It should be noted that, in the present utility model, unless otherwise specified, the specific meaning of "including" in relation to composition limitation and description includes both open-ended "including", "comprising" and similar meanings, and closed-ended "composed of", "composed of" and similar meanings.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: a three-speed shock absorption and floating valve group, including an integrated valve block 1 and a balance valve 2, a shock absorption floating oil replenishment solenoid valve 3, a floating solenoid valve 4, a heavy-load shock absorption valve 5, a light-load shock absorption valve 6, a heavy-load accumulator 7 and a light-load accumulator 8 arranged on the integrated valve block 1;

[0007] The three-speed damping and floating valve group includes a V port, a T port, a C1 port and a C2 port, wherein the V port can be connected to the B1 port of the multi-way valve, the T port can be connected to the loader oil tank, the C1 port can be connected to the rodless chamber of the loader arm lifting cylinder, and the C2 port can be connected to the rod chamber of the loader arm lifting cylinder;

[0008] When the boom is lifted, the multi-way valve B1, V port, balance valve 2, C1 port and the rodless chamber of the loader boom lifting cylinder are connected in sequence; the rod chamber of the loader boom lifting cylinder is connected to the inlet of the multi-way valve A1;

[0009] When the boom falls, the multi-way valve A1, C2 port, balance valve 2, C1 port and the rodless chamber of the boom lifting cylinder are connected in sequence, and the rodless chamber of the boom lifting cylinder, C1 port, balance valve 2, V port and multi-way valve B1 are connected in sequence;

[0010] When the loader is light-loaded and damped, the rodless chamber of the boom lifting oil cylinder is connected to the light-load accumulator (8) through the light-load damping valve (6); the oil tank, the T port, the damping floating oil replenishing solenoid valve 3, the C2 port and the rod chamber of the loader's boom lifting oil cylinder are connected in sequence;

[0011] When the loader is in medium load shock absorption, the rodless chamber of the boom lifting oil cylinder is connected to the light load accumulator (8) through the light load shock absorption valve (6), and the rodless chamber of the boom lifting oil cylinder is connected to the heavy load accumulator (7) through the heavy load shock absorption valve (5); the oil tank, T port, shock absorption floating oil replenishment solenoid valve 3, C2 port and the rod chamber of the loader boom lifting oil cylinder are connected in sequence;

[0012] When the loader is in heavy-load shock absorption, the rodless chamber of the boom lifting oil cylinder is connected to the heavy-load accumulator (7) through the heavy-load shock absorption valve (5); the oil tank, T port, shock absorption floating oil replenishment solenoid valve 3, C2 port and the rod chamber of the loader boom lifting oil cylinder are connected in sequence.

[0013] Furthermore, the integrated valve block 1 is made of aluminum alloy and is light in weight.

[0014] Furthermore, the balancing valve 2 is a one-way valve. When the boom is lifted, the oil passes through the balancing valve 2 without being compressed. When the boom is stationary, the rodless chamber of the loader boom lifting cylinder is completely sealed to prevent leakage, thus protecting the boom from being stationary.

[0015] Furthermore, the shock-absorbing floating oil replenishing solenoid valve 3 is a one-way cut-off solenoid valve. According to the requirements of the boom floating and shock-absorbing actions, when the boom floats, the excess hydraulic oil in the rod chamber of the loader's boom lifting cylinder is circulated to the oil tank, and when the boom is shock-absorbing, the rod chamber is replenished with oil through the valve group.

[0016] Furthermore, the floating solenoid valve 4 is a two-way stop valve, which connects the rod chamber of the loader boom lifting cylinder with the rodless chamber of the loader boom lifting cylinder.

[0017] Furthermore, the heavy-load shock-absorbing valve 5 is a one-way stop valve, which controls the rodless chamber of the loader's boom lifting cylinder to be connected to the heavy-load accumulator 7 to achieve heavy-load shock absorption.

[0018] Furthermore, the light-load shock-absorbing valve 6 is a one-way stop valve, which controls the rodless chamber of the loader's boom lifting cylinder to be connected to the light-load accumulator 8 to achieve light-load shock absorption.

[0019] Furthermore, the heavy-load accumulator 7 and the light-load accumulator 8 are respectively arranged on opposite sides of the integrated valve block 1. When the heavy-load shock-absorbing valve 5 is opened, the heavy-load accumulator 7 is connected to the rodless chamber of the loader's boom lifting cylinder, thereby playing a heavy-load shock-absorbing role; when the light-load shock-absorbing valve 6 is opened, the light-load accumulator 8 is connected to the rodless chamber of the loader's boom lifting cylinder, thereby playing a light-load shock-absorbing role; when the heavy-load shock-absorbing valve 5 and the light-load shock-absorbing valve 6 are energized at the same time, the heavy-load accumulator 7 and the light-load accumulator 8 work at the same time, thereby playing a medium-load shock-absorbing role.

[0020] Furthermore, the shock-absorbing floating oil replenishing solenoid valve 3 , the floating solenoid valve 4 , the heavy-load shock-absorbing valve 5 , and the light-load shock-absorbing valve 6 are arranged above the integrated valve block 1 , and the balancing valve 2 is arranged below the integrated valve block 1 .

[0021] Furthermore, the loader arm floats: the shock-absorbing floating oil replenishing solenoid valve 3, the floating solenoid valve 4, the heavy-load shock-absorbing valve 5 and the light-load shock-absorbing valve 6 are energized at the same time, the rodless chamber of the loader arm lifting oil cylinder, the C1 port, the valve group of the balancing valve 2, the C2 port and the rod chamber of the loader arm lifting oil cylinder are connected in sequence, and the rodless chamber of the loader arm lifting oil cylinder, the C1 port, the valve group of the balancing valve 2, the shock-absorbing floating oil replenishing solenoid valve 3 and the T port are connected in sequence. Part of the oil in the rodless chamber of the loader arm lifting oil cylinder passes through the valve group and enters the rod chamber of the loader arm lifting oil cylinder, and the excess part returns to the oil tank through the T port of the valve group.

[0022] The working principle of the three-speed shock absorption and floating valve group of the utility model is as follows:

[0023] First, connect the B1 port of the V-port multi-way valve of the three-speed shock absorption and floating valve group, the T port to the loader oil tank, the C1 port to the rodless chamber of the loader's arm lifting cylinder, and the C2 port to the rod chamber of the loader's arm lifting cylinder; pipeline connection Figure 3 .

[0024] The loader works normally: when the boom is lifted, the oil from the B1 port of the multi-way valve enters the V port of the valve group, passes through the one-way valve of the balance valve 2, and enters the rodless chamber of the loader's boom lifting cylinder through the C1 port. The oil in the rod chamber of the loader's boom lifting cylinder directly enters the A1 port of the multi-way valve.

[0025] When the boom falls, the oil from port A1 of the multi-way valve enters port C2 of the valve group, passes through balancing valve 2 and port C1, and enters the rodless chamber of the loader boom lifting cylinder. At the same time, the oil from port A1 enters port C2 to control the balance. When balancing valve 2 is opened, the oil from the rodless chamber of the loader boom lifting cylinder passes through port C1, balancing valve 2 and port V, and enters port B1 of the multi-way valve.

[0026] Loader light load shock absorption: the light load shock absorption valve 6 is energized, and the shock absorption floating oil replenishing solenoid valve 3 is energized. When the loader's light load boom vibrates, the oil in the rodless chamber of the loader's boom lifting cylinder enters the light load accumulator 8 through the light load shock absorption valve 6. The oil that is missing in the rod chamber of the loader's boom lifting cylinder is replenished by the shock absorption floating oil replenishing solenoid valve 3 through the oil tank.

[0027] Medium-load shock absorption of the loader: the heavy-load shock absorption valve 5 and the light-load shock absorption valve 6 are energized, and the shock absorption floating oil replenishing solenoid valve 3 is energized. When the light-load boom of the loader vibrates, the oil in the rodless chamber of the loader boom lifting cylinder enters the heavy-load accumulator 7 and the light-load accumulator 8 respectively through the heavy-load shock absorption valve 5 and the light-load shock absorption valve 6. The oil that is missing in the rod chamber of the loader boom lifting cylinder is replenished by the shock absorption floating oil replenishing solenoid valve 3 through the oil tank.

[0028] Heavy-load shock absorption of loader: heavy-load shock absorption valve 5 and shock absorption floating oil replenishing solenoid valve 3 are energized. When the loader's light-load boom vibrates, the oil in the rodless chamber of the loader's boom lifting cylinder enters the heavy-load accumulator 7 through the heavy-load shock absorption valve 5. The oil that is missing in the rod chamber of the loader's boom lifting cylinder is replenished by the shock absorption floating oil replenishing solenoid valve 3 through the oil tank.

[0029] Loader boom floats: the shock-absorbing floating oil replenishing solenoid valve 3, the floating solenoid valve 4, the heavy-load shock-absorbing valve 5 and the light-load shock-absorbing valve 6 are energized at the same time. The lifted boom will fall freely to the ground due to gravity without operating the multi-way valve; part of the oil in the rodless chamber of the loader boom lifting cylinder passes through the valve group and enters the rod chamber of the loader boom lifting cylinder, and the excess part returns to the oil tank through the T port of the valve group.

[0030] Compared with the prior art, the three-stage shock-absorbing and floating valve group of the utility model has the following advantages:

[0031] Advantage 1: The loader's boom shock absorption control function and floating function are integrated into one valve group, achieving high integration, facilitating pipeline connection, and reducing installation space; the customized integrated cartridge valve group and integrated accumulator (the accumulator absorbs excess energy when the loader boom is hovering and floating) can allow the loader's shock-absorbing boom to hover smoothly and the boom to float when the engine is turned off.

[0032] Advantage 2: Each oil circuit is controlled by solenoid valve, which is convenient for automatic control.

[0033] Advantage 3: By reducing vibration and improving driving control, the load-carrying performance of the wheel loader is improved while enhancing operator comfort.

[0034] Advantage 4: The loader's shock-absorbing tires are always in contact with the ground, which enables better steering and braking. When the boom is overloaded, the shock-absorbing valve acts as a shock absorber, eliminating vehicle bouncing, increasing tire grip, and enabling better steering and braking.

[0035] Advantage 5: A fully loaded bucket will not scatter materials, can travel faster, and improve transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is the hydraulic principle diagram of the three-speed shock absorption and floating valve group;

[0037] Figure 2 It is the structural diagram of the three-speed shock absorption and floating valve group;

[0038] Figure 3 This is the piping connection diagram for the three-speed shock absorber and floating valve group. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0041] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0042] Example 1

[0043] This embodiment discloses a three-speed damping and floating valve group, the structure of which is as follows: Figure 1-3 As shown. 1 is an integrated valve block, made of aluminum alloy and light in weight. 2. Balance valve. When the boom is lifted, the oil passes through the one-way valve without being compressed; when the boom is stationary, the force-bearing rodless chamber of the oil cylinder is completely closed with zero leakage, which plays a role in protecting the boom from being safely stationary; 3 is a shock-absorbing floating oil replenishment solenoid valve. According to the requirements of the floating and shock-absorbing actions of the boom, when the boom is floating, the excess hydraulic oil in the rod chamber of the boom is circulated to the oil tank, and when the boom is shock-absorbing, the rod chamber is replenished with oil through this valve group. 4 is a floating solenoid valve, which is a two-way stop valve, connecting the rod chamber and the rodless chamber of the boom lifting cylinder. 5 is a heavy-load shock-absorbing valve, which is a one-way stop valve, controlling the force chamber of the shock-absorbing cylinder to be connected to the high-pressure accumulator to achieve heavy-load shock absorption. 6 is a light-load shock-absorbing valve, which is a one-way stop valve, controlling the force chamber of the shock-absorbing cylinder to be connected to the high- and low-pressure accumulators to achieve light-load shock absorption. 7 is a heavy-load accumulator. When the heavy-load damping valve 5 is opened, the heavy-load accumulator is connected to the arm force chamber to play a heavy-load damping role. 8 is a light-load accumulator. When the light-load damping valve 6 is opened, the light-load accumulator is connected to the arm force chamber to play a light-load damping role. When the heavy-load damping valve 5 and the light-load damping valve 6 are energized at the same time, the heavy-load accumulator 7 and the light-load accumulator 8 work at the same time to play a medium-load damping role.

[0044] The three-speed damping and floating valve group includes a V port, a T port, a C1 port, a C2 port, a K1 port and a K2 port. The V port can be connected to the B1 port of the multi-way valve, the T port can be connected to the loader oil tank, the C1 port can be connected to the rodless cavity of the loader's boom lifting cylinder, and the C2 port can be connected to the rod cavity of the loader's boom lifting cylinder.

[0045] The working process of the three-speed shock absorption and floating valve group is as follows:

[0046] First, connect the B1 port of the V-port multi-way valve of the valve group, the T port to the loader oil tank, the C1 port to the rodless chamber of the loader's arm lifting cylinder, and the C2 port to the rod chamber of the loader's arm lifting cylinder; the pipeline connections are as follows Figure 3 .

[0047] The loader works normally: when the boom is lifted, the oil from the B1 port of the multi-way valve enters the V port of the valve group, passes through the one-way valve of the balance valve 2, and enters the rodless chamber of the boom lifting cylinder through the C1 port, and the oil in the rod chamber directly enters the A1 port of the multi-way valve. When the boom is lowered, the oil from the A1 port of the multi-way valve enters the C2 port of the valve group, the balance valve 2, and the C1 port to enter the rodless chamber of the boom lifting cylinder. At the same time, the oil from the A1 port enters the C2 port to control the opening of the balance valve 2, and the oil in the rodless chamber of the cylinder passes through the C1 port, the balance valve 2 and the V port to enter the B1 port of the multi-way valve.

[0048] Light load shock absorption of loader: the light load shock absorption valve 6 is energized, and the shock absorption floating oil replenishing solenoid valve 3 is energized. When the loader's light load boom vibrates, the oil in the rodless chamber of the cylinder enters the light load accumulator 8 through the light load shock absorption valve 6. The oil missing in the rod chamber is replenished by the shock absorption floating oil replenishing solenoid valve 3 through the oil tank.

[0049] Heavy-load shock absorption of loader: heavy-load shock absorption valve 5 and light-load shock absorption valve 6 are energized, and shock absorption floating oil replenishing solenoid valve 3 is energized. When the loader's light-load boom vibrates, the oil in the rodless chamber of the cylinder passes through the heavy-load shock absorption valve 5 and the light-load shock absorption valve 6 and enters the heavy-load accumulator 7 and the light-load accumulator 8. The oil missing in the rod chamber is replenished by the shock absorption floating oil replenishing solenoid valve 3 through the oil tank.

[0050] Heavy-load shock absorption of loader: heavy-load shock absorption valve 5 and shock absorption floating oil replenishing solenoid valve 3 are energized. When the loader's light-loaded boom vibrates, the oil in the rodless chamber of the cylinder enters the heavy-load accumulator 7 through the heavy-load shock absorption valve 5. The oil missing in the rod chamber is replenished by the shock absorption floating oil replenishing solenoid valve 3 through the oil tank.

[0051] Loader boom floats: shock-absorbing floating oil replenishing solenoid valve 3, floating solenoid valve 4, heavy-load shock-absorbing valve 5, and light-load shock-absorbing valve 6 are energized at the same time. The lifted boom will fall freely to the ground due to gravity without operating the multi-way valve; part of the oil in the rodless chamber of the cylinder passes through the valve group and enters the rod chamber of the cylinder, and the excess part returns to the oil tank through the T port of the valve group.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A three-speed damping and floating valve group, characterized in that: It comprises an integrated valve block (1), a balancing valve (2), a shock-absorbing floating oil replenishing solenoid valve (3), a floating solenoid valve (4), a heavy-load shock-absorbing valve (5), a light-load shock-absorbing valve (6), a heavy-load accumulator (7), and a light-load accumulator (8) arranged on the integrated valve block (1); The three-speed damping and floating valve group includes a V port, a T port, a C1 port and a C2 port, wherein the V port can be connected to the B1 port of the multi-way valve, the T port can be connected to the loader oil tank, the C1 port can be connected to the rodless chamber of the loader arm lifting cylinder, and the C2 port can be connected to the rod chamber of the loader arm lifting cylinder; When the boom is lifted, the multi-way valve B1, the V port, the balance valve (2), the C1 port and the rodless chamber of the loader boom lifting cylinder are connected in sequence; the rod chamber of the loader boom lifting cylinder is connected to the inlet of the multi-way valve A1; When the boom is lowered, the multi-way valve A1, the C2 port, the balancing valve (2), the C1 port and the rodless chamber of the boom lifting cylinder are connected in sequence, and the rodless chamber of the boom lifting cylinder, the C1 port, the balancing valve (2), the V port and the multi-way valve B1 are connected in sequence; When the loader is light-loaded and damped, the rodless chamber of the boom lifting oil cylinder is connected to the light-load accumulator (8) through the light-load damping valve (6); the oil tank, the T port, the damping floating oil replenishing solenoid valve (3), the C2 port and the rod chamber of the loader's boom lifting oil cylinder are connected in sequence; When the loader is in medium-load shock absorption, the rodless chamber of the boom lifting oil cylinder is connected to the light-load accumulator (8) through the light-load shock absorption valve (6), and the rodless chamber of the boom lifting oil cylinder is connected to the heavy-load accumulator (7) through the heavy-load shock absorption valve (5); the oil tank, the T port, the shock absorption floating oil replenishment solenoid valve (3), the C2 port and the rod chamber of the loader's boom lifting oil cylinder are connected in sequence; When the loader is in heavy-load shock absorption, the rodless chamber of the boom lifting oil cylinder is connected to the heavy-load accumulator (7) through the heavy-load shock absorption valve (5); the oil tank, the T port, the shock absorption floating oil replenishment solenoid valve (3), the C2 port and the rod chamber of the loader's boom lifting oil cylinder are connected in sequence.

2. The three-speed damping and floating valve assembly according to claim 1, characterized in that: The integrated valve block (1) is made of aluminum alloy.

3. The three-speed damping and floating valve assembly according to claim 1, characterized in that: The balancing valve (2) is a one-way valve.

4. The three-speed damping and floating valve assembly according to claim 1, characterized in that: The shock-absorbing floating oil-supplying solenoid valve (3) is a one-way stop solenoid valve.

5. The three-speed damping and floating valve assembly according to claim 1, characterized in that: The floating solenoid valve (4) is a two-way stop valve.

6. The three-speed damping and floating valve assembly according to claim 1, characterized in that: The heavy-load damping valve (5) is a one-way stop valve.

7. The three-speed damping and floating valve assembly according to claim 1, characterized in that: The light-load damping valve (6) is a one-way stop valve.

8. The three-speed damping and floating valve assembly according to claim 1, characterized in that: The heavy-load accumulator (7) and the light-load accumulator (8) are respectively arranged on two opposite sides of the integrated valve block (1).

9. The three-speed damping and floating valve assembly according to claim 1, characterized in that: The shock-absorbing floating oil replenishing solenoid valve (3), the floating solenoid valve (4), the heavy-load shock-absorbing valve (5), and the light-load shock-absorbing valve (6) are arranged above the integrated valve block (1), and the balancing valve (2) is arranged below the integrated valve block (1).

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