Tractor steering oil return lubrication hydraulic system and tractor with same

Abstract

The utility model relates to a tractor steering oil return lubrication hydraulic system and a tractor with the same, the tractor steering oil return lubrication hydraulic system comprises a gearbox, a steering gear, a hydraulic oil radiator and a lubrication heat dissipation end, a hydraulic oil outlet of the gearbox is connected with a hydraulic oil inlet of the steering gear through an inlet pipeline, and a pump body is arranged on the inlet pipeline; a hydraulic oil outlet of the steering gear is connected with an inlet of the hydraulic oil radiator through a pipeline, an outlet of the hydraulic oil radiator is connected with an oil return pipeline through a pipeline, one end of the oil return pipeline is connected with a plurality of lubricating branch pipelines in parallel, and each lubricating branch pipeline corresponds to one heating point position and is used for spraying and lubricating the heating point position. The other end of the oil return pipeline is connected with an oil return opening of the gearbox and provided with a lubricating back pressure valve. The forced lubrication heat dissipation device has the advantages that the lubrication heat dissipation hydraulic oil with certain pressure is generated through the lubrication back pressure valve, and meanwhile, the pressure of the lubrication heat dissipation hydraulic oil is adjusted by setting the opening pressure of the lubrication back pressure valve, so that the purpose of forced lubrication heat dissipation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery equipment, in particular to a tractor steering oil return lubrication hydraulic system and a tractor with the same. Background Art

[0002] As a conventional agricultural machinery, tractors play an indispensable role in agricultural production. As the core component of tractors, the performance of gearboxes directly affects the operating experience of the whole machine. Among them, high temperature is an important indicator affecting the performance of gearboxes. There are many heating parts in the transmission system of gearboxes when working; therefore, a certain flow of lubricating oil is required to lubricate and dissipate the heat points, so as to ensure that the gearbox can work normally for a long time.

[0003] The existing gearbox forced lubrication system only lubricates and dissipates heat for one or two hot spots in the gearbox, and the heat dissipation effect is poor. Long-term operation of the tractor can easily lead to high temperature of the gearbox, which affects the service life of the gearbox.

[0004] Based on this, in order to effectively dissipate the heat of the gearbox, it is necessary to design a forced lubrication hydraulic system with stable lubrication flow and reliable heat dissipation effect. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a tractor steering oil return lubrication hydraulic system and a tractor with the same, which effectively overcomes the defects of the prior art.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A tractor steering oil return lubrication hydraulic system comprises a gearbox, a steering gear, a hydraulic oil radiator and a lubrication and heat dissipation end, wherein the hydraulic oil outlet of the gearbox is connected to the hydraulic oil inlet of the steering gear through an inlet pipeline, and a pump body is arranged on the inlet pipeline, the hydraulic oil outlet of the steering gear is connected to the inlet of the hydraulic oil radiator through a pipeline, the outlet of the hydraulic oil radiator is connected to the oil return pipeline through a pipeline, one end of the oil return pipeline is connected to a plurality of lubrication branch pipelines in parallel, each of the lubrication branch pipelines corresponds to a heating point and is used for spraying lubrication on the heating point, the other end of the oil return pipeline is connected to the oil return port of the gearbox, and a lubrication back pressure valve is arranged on the other end of the oil return pipeline.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, a bypass pipe is connected in parallel between the inlet and outlet of the hydraulic oil radiator.

[0010] Furthermore, a bypass valve is provided on the bypass pipe.

[0011] Furthermore, the bypass valve is an electrically controlled valve, and the bypass valve and the pump body are respectively connected to a control system.

[0012] Furthermore, the pump body is a steering gear pump.

[0013] Furthermore, an oil suction filter is also provided on the above-mentioned inlet pipeline, and the above-mentioned oil suction filter is located on the pipe section between the above-mentioned pump body and the hydraulic oil outlet of the gearbox.

[0014] Furthermore, the above-mentioned heating points include the left brake, the right brake, the shift synchronizer and the main transmission shaft bearing.

[0015] Furthermore, the ends of the lubrication branch lines are respectively provided with spraying units.

[0016] Furthermore, the lubrication branch lines are each detachably connected in series with a throttling joint.

[0017] The utility model has the following beneficial effects: the structural design is simple and reasonable, lubricating and cooling hydraulic oil with a certain pressure is generated by the lubricating back pressure valve, and at the same time, the pressure of the lubricating and cooling hydraulic oil is adjusted by setting the opening pressure of the lubricating back pressure valve, thereby achieving the purpose of forced lubrication and cooling.

[0018] A tractor is also provided, comprising a tractor steering oil return lubrication hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the tractor steering oil return lubrication hydraulic system of the utility model;

[0020] Figure 2 It is a structural schematic diagram of another embodiment of the tractor steering oil return lubrication hydraulic system of the utility model.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 1. Gearbox; 2. Oil suction filter; 3. Pump body; 4. Steering gear; 5. Hydraulic oil radiator; 6. Lubrication heat dissipation end; 7. Lubrication back pressure valve; 8. Bypass valve; 9. Throttle joint; 61. Left brake; 62. Right brake; 63. Shift synchronizer; 64. Main transmission shaft bearing. DETAILED DESCRIPTION

[0023] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0024] Example 1

[0025] like Figure 1As shown, the tractor steering oil return lubrication hydraulic system of this embodiment includes a gearbox 1, a steering gear 4, a hydraulic oil radiator 5 and a lubrication and heat dissipation end 6, the hydraulic oil outlet of the gearbox 1 is connected to the hydraulic oil inlet of the steering gear 4 through an inlet pipeline, and a pump body 3 is provided on the inlet pipeline, the hydraulic oil outlet of the steering gear 4 is connected to the inlet of the hydraulic oil radiator 5 through a pipeline, the outlet of the hydraulic oil radiator 5 is connected to the return oil pipeline through a pipeline, one end of the return oil pipeline is connected in parallel with a plurality of lubrication branch pipelines, each of the lubrication branch pipelines corresponds to a heating point and is used to spray lubrication on the heating point, the other end of the return oil pipeline is connected to the oil return port of the gearbox 1, and a lubrication back pressure valve 7 is provided at the other end of the return oil pipeline.

[0026] The specific working principle of the tractor steering oil return lubrication hydraulic system of this embodiment is as follows:

[0027] ① The hydraulic oil in the gearbox 1 is pumped out through the pump body 3, and the hydraulic oil enters the internal hydraulic oil circuit of the steering gear 4 through the P port of the steering gear 4;

[0028] ② After the hydraulic oil passes through the steering gear 4, it flows out from the T port of the steering gear 4 and enters the hydraulic oil radiator 5 for heat dissipation, and then flows through the return oil pipeline. The lubricating back pressure valve 7 allows the hydraulic oil with a certain pressure to enter each lubricating branch line, and then lubricates and dissipates the heat points corresponding to each lubricating branch line; then, it flows back into the gearbox 1. The overall structural design is simple and reasonable. The lubricating back pressure valve generates lubricating and cooling hydraulic oil with a certain pressure. At the same time, by setting the opening pressure of the lubricating back pressure valve, the pressure of the lubricating and cooling hydraulic oil is adjusted, thereby achieving the purpose of forced lubrication and heat dissipation.

[0029] As a preferred embodiment, the oil return pipeline is connected with a tee, and the outlet of the hydraulic oil radiator 5 is connected to the remaining interface of the tee through a pipeline.

[0030] In the above implementation scheme, the oil return pipeline is designed as a two-section pipeline, one end of the two sections of the pipeline is respectively connected to two of the interfaces of the tee, and the remaining interface of the tee is connected to the outlet pipeline of the hydraulic oil radiator 5 to achieve good docking of the pipelines.

[0031] As a preferred embodiment, a bypass pipe is connected in parallel between the inlet and the outlet of the hydraulic oil radiator 5 .

[0032] In the above implementation scheme, when the hydraulic oil radiator 5 fails, the bypass pipe opens, the hydraulic oil flows through the bypass pipe, and then flows through the return oil pipeline. The lubricating back pressure valve 7 allows the hydraulic oil with a certain pressure to enter each lubrication branch line, and then lubricates and dissipates heat at the corresponding heating points of each lubrication branch line.

[0033] In this embodiment, the bypass pipe is provided with a bypass valve 8. Whether the hydraulic oil in the bypass pipe passes through is controlled by opening and closing the bypass valve 8, which is simple and convenient to operate.

[0034] As a preferred embodiment, the bypass valve 8 is an electrically controlled valve, and the bypass valve 8 and the pump body 3 are respectively connected to a control system.

[0035] In the above implementation scheme, the control system controls the opening and closing of the pump body 3 and the bypass valve 8 respectively, thereby achieving good automatic control.

[0036] In this embodiment, the pump body 3 can be a steering gear pump of an adapted model, which belongs to the product of the prior art and will not be described in detail here.

[0037] As a preferred embodiment, an oil suction filter 2 is further provided on the inlet pipeline. The oil suction filter 2 is located on the pipe section between the pump body 3 and the hydraulic oil outlet of the gearbox 1 .

[0038] In the above implementation scheme, by arranging an oil suction filter 2 on the outlet pipeline of the gearbox 1, the hydraulic oil coming out of the gearbox 1 can be filtered to ensure that there are fewer particles in the oil entering the subsequent pump body 3 and the steering gear 4 or each valve, thereby avoiding particle damage or blockage.

[0039] As a preferred implementation, the above-mentioned heating points include a left brake 61 , a right brake 62 , a shift synchronizer 63 and a main transmission shaft bearing 64 .

[0040] In the above implementation scheme, the lubricating back-pressure valve 7 will allow the hydraulic oil with a certain pressure to enter the shift synchronizer 63 to lubricate and dissipate heat for the shift synchronizer 63; similarly, the lubricating back-pressure valve 7 will allow the hydraulic oil with a certain pressure to enter the main speed transmission shaft bearing 64 to lubricate and dissipate heat for the main speed transmission shaft bearing 64; similarly, the lubricating back-pressure valve 7 will allow the hydraulic oil with a certain pressure to enter the left brake 61 to lubricate and dissipate heat for the left brake 61; similarly, the lubricating back-pressure valve 7 will allow the hydraulic oil with a certain pressure to enter the right brake 62 to lubricate and dissipate heat for the right brake 62; ensure that each hot spot can have hydraulic oil of appropriate pressure for lubrication and heat dissipation.

[0041] In this embodiment, a spray unit is provided at each end of the lubrication branch line to lubricate and dissipate heat by spraying. The spray unit belongs to the prior art and is often involved in current hydraulic oil lubrication, so it will not be described in detail here.

[0042] As a preferred embodiment, Figure 2 As shown, the lubrication branch lines are each detachably connected in series with a throttling joint 9.

[0043] In the above implementation scheme, the throttle joint 9 (denoted by a in the figure) ensures that a suitable lubrication and heat dissipation flow enters the shift synchronizer 63 to lubricate and dissipate heat for the shift synchronizer 63; similarly, the throttle joint 9 (denoted by b in the figure) ensures that a suitable lubrication and heat dissipation flow enters the main speed transmission shaft bearing 64 to lubricate and dissipate heat for the main speed transmission shaft bearing 64; similarly, the throttle joint 9 (denoted by c in the figure) ensures that a suitable lubrication and heat dissipation flow enters the left brake 61 to lubricate and dissipate heat for the left brake 61; similarly, the throttle joint 9 (denoted by d in the figure) ensures that a suitable lubrication and heat dissipation flow enters the right brake 62 to lubricate and dissipate heat for the right brake 62; the lubrication flow requirements of each lubrication point are met by combining different throttle joints.

[0044] It should be particularly emphasized that the flow rate of lubricating and cooling hydraulic oil entering different lubrication points can be adjusted by changing the diameter of the throttling hole of the throttling joint 9, wherein the diameter of the throttling hole of the throttling joint 9 is achieved by replacing throttling joints 9 of different models, and therefore, the throttling joint 9 is detachably connected to the lubrication branch line.

[0045] Example 2

[0046] The tractor of this embodiment includes the tractor steering oil return lubrication hydraulic system of embodiment 1.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A tractor steering oil return lubrication hydraulic system, characterized in that: The invention comprises a gearbox (1), a steering gear (4), a hydraulic oil radiator (5) and a lubricating and cooling end (6); the hydraulic oil outlet of the gearbox (1) is connected to the hydraulic oil inlet of the steering gear (4) via an inlet pipeline, and a pump body (3) is provided on the inlet pipeline; the hydraulic oil outlet of the steering gear (4) is connected to the inlet of the hydraulic oil radiator (5) via a pipeline; the outlet of the hydraulic oil radiator (5) is connected to an oil return pipeline via a pipeline; one end of the oil return pipeline is connected in parallel to a plurality of lubricating branch pipelines, each of which corresponds to a heating point and is used for spraying lubrication on the heating point; the other end of the oil return pipeline is connected to the oil return port of the gearbox (1); and the other end of the oil return pipeline is provided with a lubricating back pressure valve (7).

2. A tractor steering oil return lubrication hydraulic system according to claim 1, characterized in that: A bypass pipe is connected in parallel between the inlet and outlet of the hydraulic oil radiator (5).

3. A tractor steering oil return lubrication hydraulic system according to claim 2, characterized in that: The bypass pipe is provided with a bypass valve (8).

4. A tractor steering oil return lubrication hydraulic system according to claim 3, characterized in that: The bypass valve (8) is an electrically controlled valve, and the bypass valve (8) and the pump body (3) are respectively connected to a control system.

5. A tractor steering oil return lubrication hydraulic system according to claim 1, characterized in that: The pump body (3) is a steering gear pump.

6. A tractor steering oil return lubrication hydraulic system according to claim 5, characterized in that: An oil suction filter (2) is also provided on the inlet pipeline, and the oil suction filter (2) is located on the pipe section between the pump body (3) and the hydraulic oil outlet of the gearbox (1).

7. A tractor steering oil return lubrication hydraulic system according to claim 1, characterized in that: The heating points include a left brake (61), a right brake (62), a gear shift synchronizer (63) and a main transmission shaft bearing (64).

8. The tractor steering oil return lubrication hydraulic system according to claim 6, characterized in that: The ends of the lubrication branch lines are respectively provided with spraying units.

9. A tractor steering oil return lubrication hydraulic system according to claim 6, characterized in that: The lubrication branch lines are respectively detachably connected in series with throttling joints (9).

10. A tractor, characterized in that: It comprises the tractor steering oil return lubrication hydraulic system as claimed in any one of claims 1 to 9.

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