Hydraulic system of round baler

Abstract

The hydraulic system of the round baler comprises a main control valve, a rear door oil cylinder, a picking oil cylinder and a bottom plate oil cylinder, a first working connector of the main control valve is connected with a small cavity of the rear door oil cylinder through a pipeline, and a second working connector of the main control valve is connected with a large cavity of the rear door oil cylinder through a pipeline; a third working interface of the main control valve is connected with a first electromagnetic valve, and a first working interface of the first electromagnetic valve is connected with a large cavity of the picking oil cylinder through a pipeline; a second working connector of the first electromagnetic valve is connected with a large cavity of the bottom plate oil cylinder through a pipeline, and a fourth working connector of the main control valve is connected with a small cavity of the bottom plate oil cylinder through a pipeline. According to the utility model, the use efficiency of hydraulic elements is high, the system is simple, and the manufacturing cost and the maintenance difficulty are reduced; the main control valve and the first electromagnetic valve can be controlled through electric control, the operation convenience and the automation degree are improved through an electric hydraulic control mode, and the operation error rate is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to tractor agricultural implement hydraulic system technical field, concretely relates to a round baler hydraulic system. BACKGROUND

[0002] With the wide application of tractor agricultural implement, the accurate control performance and the operation convenience of the round baler are put forward to higher requirement. The existing round baler usually obtains power through the power output shaft of tractor. When working, the forage is picked up by the pickup, and the picked material is sent into the baling chamber through the conveying device, and after being compacted into round bale shape in the baling chamber, the back door of the baling chamber is opened, and the round bale-shaped material is discharged. When the blockage occurs, the round baler bottom plate is opened to discharge the blocked material. In the above working process, the power of the pickup, the conveying device and the baling chamber all come from the output shaft of the tractor, which belongs to the original function of the round baler.

[0003] However, the opening and closing actions of the baling chamber back door, the lifting and floating actions of the pickup and the opening and closing actions of the round baler bottom plate need to be controlled by the oil cylinder. Therefore, multiple independent hydraulic systems need to be arranged on the tractor for controlling the actions of each oil cylinder. This design not only increases the structural complexity and weight of the equipment, but also increases the manufacturing cost and maintenance difficulty of the equipment. In addition, the operator needs to manually operate each hydraulic system, which is tedious and labor-intensive, and is prone to equipment failure or reduced work efficiency due to operation errors. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is how to simplify the structure of the hydraulic system, improve the operation convenience and automation degree to meet the demand of modern agriculture for efficient and accurate operation of the round baler.

[0005] The technical solution of the utility model for solving the above technical problem is as follows:

[0006] The utility model provides a kind of round baler hydraulic system, including main control valve, back door oil cylinder, pickup oil cylinder, bottom plate oil cylinder, the first working interface of main control valve is connected with the small cavity of back door oil cylinder by pipeline, and the second working interface of main control valve is connected with the large cavity of back door oil cylinder by pipeline;The third working interface of main control valve is connected with first solenoid valve, and the first working interface of first solenoid valve is connected with the large cavity of pickup oil cylinder by pipeline;The second working interface of first solenoid valve is connected with the large cavity of bottom plate oil cylinder by pipeline, and the fourth working interface of main control valve is connected with the small cavity of bottom plate oil cylinder by pipeline.

[0007] The utility model has the beneficial effects that:

[0008] The utility model discloses, through the control main control valve and first solenoid valve, can control the telescopic state of back door oil cylinder, pick -up oil cylinder and bottom plate oil cylinder, and hydraulic element uses the high efficiency, and system is simple, has reduced manufacturing cost and maintenance difficulty, simultaneously, main control valve and first solenoden valve can pass through electric control control, and the mode of electrohydraulic control has improved the operation convenience and automation degree, has reduced the operation failure rate.

[0009] On the basis of the above technical scheme, the utility model further can make the following improvement.

[0010] Further, the first working interface of the first solenoid valve to the pipeline of the large cavity of the pick-up oil cylinder is further provided with a first hydraulic lock, and the fourth working interface of the main control valve is further connected with a second solenoid valve, the first working interface of the second solenoid valve is connected with the control end of the first hydraulic lock, and the second working interface of the second solenoid valve is connected with the small cavity of the bottom plate oil cylinder.

[0011] When the fourth working interface of the main control valve outputs, the pick-up oil cylinder is locked through the first hydraulic lock, load holding is realized, and the floating of the pick-up device can be supported; meanwhile, the first working interface of the second solenoid valve can be controlled to output so as to open the hydraulic lock, and the oil return of the pick-up oil cylinder is realized; the second working interface of the second solenoid valve can also be controlled to output, so that the small cavity of the bottom plate oil cylinder is supplied with oil, and the shortening of the bottom plate oil cylinder is realized.

[0012] Further, the first solenoid valve and the second solenoid valve are both two-position three-way valves.

[0013] The pressure oil ports of the two-position three-way valves are all used for connecting the main control valve, the structure is compact, and the operation is convenient.

[0014] Further, the second working interface of the second solenoid valve to the pipeline of the small cavity of the bottom plate oil cylinder is further provided with a third solenoid valve, and the first working interface of the first solenoid valve to the pipeline of the large cavity of the pick-up oil cylinder is further provided with a fourth solenoid valve.

[0015] The on-off of the oil supply and oil return of the two cavities of the bottom plate oil cylinder is facilitated, the influence of the pick-up oil cylinder operation process on the bottom plate oil cylinder is reduced, and the system stability is improved.

[0016] Further, the third solenoid valve and the fourth solenoid valve are both electromagnetic on-off valves.

[0017] The operation is convenient, the structure is compact, and the cost is low.

[0018] Further, the third solenoid valve and the fourth solenoid valve are both normally closed valves.

[0019] The third solenoid valve and the fourth solenoid valve are both opened when electricity is obtained, so that the bottom plate oil cylinder is controlled when it needs to act, and is in a locked state at the rest of the time, and the system stability is good.

[0020] Furthermore, a second hydraulic lock is provided on the pipeline from the first working interface of the main control valve to the small cavity of the rear door cylinder. The control end of the second hydraulic lock is connected to the pipeline from the second working interface of the main control valve to the large cavity of the rear door cylinder.

[0021] When neither the first nor the second working port of the main control valve outputs, the oil in the small chamber of the rear door cylinder is locked by the second hydraulic lock, thus maintaining the state of the rear door cylinder. When the main control valve is operated to output through the second working port, the oil pressure on the pipeline from the second working port of the main control valve to the large chamber of the rear door cylinder can open the second hydraulic lock, thus enabling the return of oil from the small chamber of the rear door cylinder.

[0022] Furthermore, a pressure gauge is also installed on the pipeline from the second hydraulic lock to the small cavity of the rear door cylinder.

[0023] It facilitates monitoring of the pressure in the small chamber of the rear door hydraulic cylinder.

[0024] Furthermore, it also includes a safety valve, one end of which is connected to the pipeline from the first working interface of the main control valve to the small chamber of the rear door cylinder, and the other end of which is connected to the pipeline from the second working interface of the main control valve to the large chamber of the rear door cylinder.

[0025] When the output pressure of the main control valve is too high, some oil flows out of the safety valve and returns to the source, which helps to constrain the working pressure of the rear door cylinder and improves safety.

[0026] Furthermore, the second working interface of the main control valve is also connected to a shut-off valve.

[0027] It facilitates the control of the oil flow in the large chamber of the rear door cylinder and makes maintenance convenient. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is a schematic diagram of the structure of the rear door hydraulic cylinder in its shortened state.

[0030] Figure 3 This is a schematic diagram of the structure of the rear door hydraulic cylinder in its extended state.

[0031] Figure 4 A schematic diagram of the structure of the hydraulic cylinder in its extended state for picking up items.

[0032] Figure 5 This is a schematic diagram of the structure of the base plate hydraulic cylinder in its extended state.

[0033] Figure 6 This is a structural diagram of the base plate hydraulic cylinder in its shortened state.

[0034] In the accompanying drawings, the technical features represented by each reference numeral are as follows:

[0035] 1-Main control valve; 2-Rear door cylinder; 3-Pickup cylinder; 4-Base plate cylinder; 5-First solenoid valve; 6-Second solenoid valve; 7-First hydraulic lock; 8-Third solenoid valve; 9-Fourth solenoid valve; 10-Second hydraulic lock; 11-Pressure gauge; 12-Safety valve; 13-Stop valve. Detailed Implementation

[0036] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0037] This utility model refers to Figures 1-6 .

[0038] This utility model provides a hydraulic system for a round baler, including a main control valve 1, a rear door cylinder 2, a pickup cylinder 3, and a base plate cylinder 4. The first working interface of the main control valve 1 is connected to the small chamber of the rear door cylinder 2 via a pipeline, and the second working interface of the main control valve 1 is connected to the large chamber of the rear door cylinder 2 via a pipeline. The third working interface of the main control valve 1 is connected to a first solenoid valve 5, and the first working interface of the first solenoid valve 5 is connected to the large chamber of the pickup cylinder 3 via a pipeline. The second working interface of the first solenoid valve 5 is connected to the large chamber of the base plate cylinder 4 via a pipeline, and the fourth working interface of the main control valve 1 is connected to the small chamber of the base plate cylinder 4 via a pipeline.

[0039] principle:

[0040] The main control valve 1 can be a tractor main control valve, which is an existing component on the tractor used to control hydraulic output. The main control valve 1 has at least four working ports. As an example, the main control valve 1 can be a four-position six-way valve, with its pressure port and return port used to connect to the hydraulic output system on the tractor, and the remaining four working ports being the first to fourth working ports. Alternatively, the main control valve 1 can be two two-position four-way valves, with both their pressure port and return port used to connect to the hydraulic output system on the tractor. The two working ports of the first two-position four-way valve serve as the first and second working ports, and the two working ports of the other two-position four-way valve serve as the third and fourth working ports.

[0041] The first solenoid valve 5 can be a two-position three-way valve, with its pressure port connected to the third working interface of the main control valve 1, and the other two working interfaces being the first working interface and the second working interface of the first solenoid valve 5.

[0042] Work process:

[0043] Rear door cylinder 2 in shortened state Figure 2As shown: When the main control valve 1 is operated to the first working interface output, the pressurized oil is output to the small chamber of the rear door cylinder 2 through the first working interface of the main control valve 1. At the same time, the oil in the large chamber of the rear door cylinder 2 returns through the second working interface of the main control valve 1. The rear door cylinder 2 is shortened, which can be used to drive the closing action of the rear door of the round baler.

[0044] Rear door cylinder 2 extended state as follows Figure 3 As shown: When the main control valve 1 is operated to the second working interface, pressurized oil is output through the second working interface of the main control valve 1 to the large chamber of the rear door cylinder 2. At the same time, the oil in the small chamber of the rear door cylinder 2 returns through the first working interface of the main control valve 1. The rear door cylinder 2 extends, which can be used to drive the opening action of the rear door of the round baler.

[0045] Pickup cylinder 3 in extended state as follows Figure 4 As shown: When the main control valve 1 is operated to output from the third working port, and the first solenoid valve 5 is operated to output from the first working port, pressurized oil is sequentially output through the third working port of the main control valve 1 and the first working port of the first solenoid valve 5 to the large chamber of the pickup cylinder 3. The pickup cylinder 3 extends, which can be used to drive the pickup to rise. At this time, when the main control valve 1 is operated to output from the fourth working port, the oil in the large chamber of the pickup cylinder 3 returns sequentially through the first working port of the first solenoid valve 5 and the third working port of the main control valve 1. The pickup cylinder 3 shortens under the weight of the pickup itself. When the first solenoid valve 5 is operated to output from the second working port, the first solenoid valve 5 closes to the first working port, which can maintain the oil in the large chamber of the pickup cylinder 3 and can be used to support the floating of the pickup.

[0046] Base plate cylinder 4 in extended state as follows Figure 5 As shown: The main control valve 1 is operated to output through the third working port, and the first solenoid valve 5 is operated to output through the second working port. Pressurized oil is sequentially output through the third working port of the main control valve 1 and the second working port of the first solenoid valve 5 to the large chamber of the bottom plate cylinder 4. Simultaneously, the oil in the small chamber of the bottom plate cylinder 4 returns through the fourth working port of the main control valve 1. The bottom plate cylinder 4 extends, which can be used to drive the opening action of the round baler's bottom plate.

[0047] Base plate cylinder 4 in shortened state as follows Figure 6 As shown: The main control valve 1 is operated to output to the fourth working port, and the first solenoid valve 5 is operated to output to the second working port. Pressurized oil is output through the fourth working port of the main control valve 1 to the small chamber of the bottom plate cylinder 4. Simultaneously, the oil in the large chamber of the bottom plate cylinder 4 returns sequentially through the second working port of the first solenoid valve 5 and the third working port of the main control valve 1. The bottom plate cylinder 4 is shortened, which can be used to drive the closing action of the round baler's bottom plate.

[0048] By using this utility model, the extension and retraction states of the rear door cylinder 2, the pickup cylinder 3, and the base plate cylinder 4 can be controlled by manipulating the main control valve 1 and the first solenoid valve 5. The hydraulic components are highly efficient, the system is simple, and the manufacturing cost and maintenance difficulty are reduced. At the same time, the main control valve 1 and the first solenoid valve 5 can be electrically controlled. The electro-hydraulic control method improves the convenience of operation and the degree of automation, and reduces the operation error rate.

[0049] Furthermore, a first hydraulic lock 7 is provided on the pipeline from the first working interface of the first solenoid valve 5 to the large cavity of the pickup cylinder 3, and a second solenoid valve 6 is connected to the fourth working interface of the main control valve 1. The first working interface of the second solenoid valve 6 is connected to the control end of the first hydraulic lock 7, and the second working interface of the second solenoid valve 6 is connected to the small cavity of the base plate cylinder 4.

[0050] When the main control valve 1 outputs from the fourth working interface, the first hydraulic lock 7 controls the pickup cylinder 3 to lock, thereby maintaining the load and supporting the floating of the pickup. At the same time, the first working interface of the second solenoid valve 6 can be controlled to open the hydraulic lock, thereby enabling the return of oil from the pickup cylinder 3. The second working interface of the second solenoid valve 6 can also be controlled to supply oil to the small chamber of the base plate cylinder 4, thereby shortening the base plate cylinder 4.

[0051] Furthermore, both the first solenoid valve 5 and the second solenoid valve 6 are two-position three-way valves.

[0052] The pressure ports of the two-position three-way valve are both used to connect to the main control valve 1. It has a compact structure and is easy to operate.

[0053] Furthermore, a third solenoid valve 8 is provided on the pipeline from the second working interface of the second solenoid valve 6 to the small cavity of the base plate cylinder 4; a fourth solenoid valve 9 is provided on the pipeline from the first working interface of the first solenoid valve 5 to the large cavity of the pickup cylinder 3.

[0054] It facilitates the control of the oil supply and return of the two chambers of the base plate cylinder 4, reduces the impact of the base plate cylinder 4 on the operation of the pickup cylinder 3, and improves the stability of the system.

[0055] Furthermore, both the third solenoid valve 8 and the fourth solenoid valve 9 are electromagnetic switching valves.

[0056] It is easy to operate, has a compact structure, and is low in cost.

[0057] Furthermore, both the third solenoid valve 8 and the fourth solenoid valve 9 are normally closed valves.

[0058] Both the third solenoid valve 8 and the fourth solenoid valve 9 are energized and open, allowing the base plate cylinder 4 to be controlled when needed, while remaining locked at other times, resulting in good system stability.

[0059] Furthermore, a second hydraulic lock 10 is provided on the pipeline from the first working interface of the main control valve 1 to the small cavity of the rear door cylinder 2. The control end of the second hydraulic lock 10 is connected to the pipeline from the second working interface of the main control valve 1 to the large cavity of the rear door cylinder 2.

[0060] When neither the first nor the second working port of the main control valve 1 outputs, the oil in the small chamber of the rear door cylinder 2 is locked by the second hydraulic lock 10, thus maintaining the state of the rear door cylinder 2. When the main control valve 1 is operated to output to the second working port, the oil pressure on the pipeline from the second working port of the main control valve 1 to the large chamber of the rear door cylinder 2 can open the second hydraulic lock 10, thus realizing the return of oil to the small chamber of the rear door cylinder 2.

[0061] Furthermore, a pressure gauge 11 is also provided on the pipeline from the second hydraulic lock 10 to the small cavity of the rear door cylinder 2.

[0062] This facilitates monitoring of the pressure in the small chamber of the rear door cylinder 2.

[0063] Furthermore, it also includes a safety valve 12, one end of which is connected to the pipeline from the first working interface of the main control valve 1 to the small chamber of the rear door cylinder 2, and the other end of which is connected to the pipeline from the second working interface of the main control valve 1 to the large chamber of the rear door cylinder 2.

[0064] When the output pressure of the main control valve 1 is too high, some oil will flush out the safety valve 12 to return oil, which helps to restrain the working pressure of the rear door cylinder 2 and improves safety.

[0065] Furthermore, the second working interface of the main control valve 1 is also connected to a shut-off valve 13.

[0066] It facilitates the control of the oil flow in the large chamber of the rear door cylinder 2, and makes maintenance convenient.

[0067] In the description of this utility model, it should be understood that if descriptive terms indicating orientation, direction, or positional relationship appear, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of understanding this utility model and simplifying the description, and does not indicate or imply that the part, element, or whole referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0068] Furthermore, if sequential descriptive terms such as "first," "second," etc., appear, their purpose in this specification is for ease of understanding or simplification. For example, to distinguish multiple technical features of the same type or function, which must be mentioned separately, this specification may use prefixes or suffixes to differentiate them. Therefore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this utility model, if descriptive terms describing structural relationships are used, such as "installation," "connection," "joining," and "fixing," they should be interpreted broadly unless otherwise explicitly specified and limited. For example, "installation," "connection," and "joining" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. "Fixing" can refer to an integral fixation or a detachable fixation using fasteners; it can be a direct fixation or a fixation through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood based on the specific circumstances, the context, and the coherence of the preceding and following text.

[0070] In this utility model, if descriptive terms containing subordinate or connecting meanings appear, such as "above" or "below" the second feature, they should not be interpreted restrictively unless otherwise explicitly specified and limited. For example, "above" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood according to the specific circumstances, the context, and the coherence of the preceding and following text.

[0071] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments, examples, and features described in this specification, and such combinations or integrations should all fall within the scope of the present invention.

[0073] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Variations, modifications, substitutions, and modifications made by those skilled in the art to the above embodiments within the scope of information available through public channels and in conjunction with the technical teachings given in this application are still covered within the protection scope of this application.

Claims

1. A hydraulic system for a round baler, characterized in that: The system includes a main control valve (1), a rear door cylinder (2), a pickup cylinder (3), and a base plate cylinder (4). The first working interface of the main control valve (1) is connected to the small chamber of the rear door cylinder (2) through a pipeline, and the second working interface of the main control valve (1) is connected to the large chamber of the rear door cylinder (2) through a pipeline. The third working interface of the main control valve (1) is connected to a first solenoid valve (5), and the first working interface of the first solenoid valve (5) is connected to the large chamber of the pickup cylinder (3) through a pipeline. The second working interface of the first solenoid valve (5) is connected to the large chamber of the base plate cylinder (4) through a pipeline, and the fourth working interface of the main control valve (1) is connected to the small chamber of the base plate cylinder (4) through a pipeline.

2. The hydraulic system of the round baler according to claim 1, characterized in that: A first hydraulic lock (7) is also provided on the pipeline from the first working interface of the first solenoid valve (5) to the large cavity of the pickup cylinder (3). The fourth working interface of the main control valve (1) is also connected to a second solenoid valve (6). The first working interface of the second solenoid valve (6) is connected to the control end of the first hydraulic lock (7), and the second working interface of the second solenoid valve (6) is connected to the small cavity of the base plate cylinder (4).

3. The hydraulic system of the round baler according to claim 2, characterized in that: Both the first solenoid valve (5) and the second solenoid valve (6) are two-position three-way valves.

4. The hydraulic system of the round baler according to claim 2, characterized in that: A third solenoid valve (8) is also provided on the pipeline from the second working interface of the second solenoid valve (6) to the small cavity of the base plate cylinder (4); a fourth solenoid valve (9) is also provided on the pipeline from the first working interface of the first solenoid valve (5) to the large cavity of the pickup cylinder (3).

5. The hydraulic system of the round baler according to claim 4, characterized in that: Both the third solenoid valve (8) and the fourth solenoid valve (9) are electromagnetic switching valves.

6. The hydraulic system of the round baler according to claim 5, characterized in that: Both the third solenoid valve (8) and the fourth solenoid valve (9) are normally closed valves.

7. The hydraulic system of the round baler according to claim 1, characterized in that: A second hydraulic lock (10) is also provided on the pipeline from the first working interface of the main control valve (1) to the small cavity of the rear door cylinder (2). The control end of the second hydraulic lock (10) is connected to the pipeline from the second working interface of the main control valve (1) to the large cavity of the rear door cylinder (2).

8. The hydraulic system of the round baler according to claim 7, characterized in that: A pressure gauge (11) is also provided on the pipeline from the second hydraulic lock (10) to the small cavity of the rear door cylinder (2).

9. The hydraulic system of the round baler according to claim 1, characterized in that: It also includes a safety valve (12), one end of which is connected to the pipeline from the first working interface of the main control valve (1) to the small chamber of the rear door cylinder (2), and the other end of which is connected to the pipeline from the second working interface of the main control valve (1) to the large chamber of the rear door cylinder (2).

10. The hydraulic system of the round baler according to claim 1, characterized in that: The second working interface of the main control valve (1) is also connected to a shut-off valve (13).

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