Lifter shell and tractor

Abstract

The utility model provides a lifter shell and a tractor. With the forward direction of a tractor as the front, the lifter shell comprises a body part, a first oil filling pipeline and a second oil filling pipeline, the body part is arranged on the upper end face of a gearbox in a sealed mode, and the body part can be matched with the upper end face of the gearbox to form a closed cavity used for containing hydraulic fluid; the first oil filling pipeline is arranged on the body part; the second oil filling pipeline is arranged on the side wall of the body part and extends to be communicated with the gearbox along a pipeline integrally arranged with the inner wall of the body part. The lifter shell is designed to be the independent hydraulic oil tank, independent oil supply to the lifting hydraulic system is achieved, the cleanliness and stability of the lifting hydraulic system are improved, the failure rate of the lifter can be effectively reduced, the positions of the oil filling port and the oil outlet of the lifter shell are designed, the volume and the oil loading quantity of the lifter shell are improved, and the lifting hydraulic system is more convenient to use. And the lifting force and the lifting stroke of the lifter are further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tractors, in particular to a lift housing and a tractor. Background Art

[0002] In the prior art, the lift housing of some tractor models not only needs to serve as the mounting seat for the lift arm, but also needs to undertake the function of the hydraulic oil tank. However, small tractors do not have sufficient space advantages, resulting in a relatively small accommodating space for the lift housing, which in turn leads to a decrease in the amount of recyclable hydraulic oil in the lift system and a relatively high oil temperature, affecting the service life of the components of the entire hydraulic system.

[0003] Therefore, it is necessary to provide a lift housing and a tractor to overcome the defects existing above. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a lift housing and a tractor.

[0005] According to one aspect of the utility model, a lift housing is provided. Taking the forward direction of the tractor as the front, it includes: a body part, the body part is sealed on the upper end face of the gearbox, and the body part can cooperate with the upper end face of the gearbox to form a closed cavity for accommodating hydraulic fluid; a first refueling pipeline, the first refueling pipeline is arranged on the body part; a second refueling pipeline, the second refueling pipeline is arranged on the side wall of the body part and extends along a pipeline integrally arranged with the inner wall of the body part to communicate with the gearbox.

[0006] Preferably, the upper end face of the body part has a first open window, and the lower end face of the body part has a second open window.

[0007] Preferably, a top cover plate is also equipped on the first open window, and the second open window is sealed and installed on the upper end face of the gearbox.

[0008] Preferably, the lift housing further includes a lift arm mounting seat located below the first refueling pipeline. The lift arm mounting seat includes a supporting part integrally arranged on the rear end face of the body part and a sleeve part arranged on the supporting part and the rear wall of the body part.

[0009] Preferably, a first mounting boss for installing a flow dividing block is arranged on the side wall of the body part, and a second mounting boss for installing a tube bundle clamp is arranged on the front end face of the body part.

[0010] Preferably, a first mounting hole for installing an oil suction pipe and a second mounting hole for installing an oil return pipe are further arranged on the side wall of the body part, and a third mounting hole for installing a breather is further arranged on the top cover plate.

[0011] Preferably, a partition is further provided on the lower surface of the upper cover plate, and a through hole is provided on the partition.

[0012] According to another aspect of the present invention, a tractor is provided, including: a transmission; a lift housing disposed on the upper end surface of the transmission; a lift pump, an oil inlet of the lift pump is connected to the lift housing through a pipeline; a multi-way valve, an oil supply port of the multi-way valve is connected to an oil outlet of the lift pump through a pipeline; a flow dividing block disposed on the first mounting boss; a first lift cylinder and a second lift cylinder, the first lift cylinder and the second lift cylinder are disposed behind the transmission, and the first lift cylinder and the second lift cylinder are connected to the multi-way valve through the flow dividing block; a first lift arm and a second lift arm, the first lift arm and the second lift arm are respectively rotatably mounted at two ends of the sleeve portion, the first lift cylinder drives the first lift arm to rotate along the sleeve portion, and the second lift cylinder drives the second lift arm to rotate along the sleeve portion.

[0013] Preferably, the flow dividing block includes a first fluid dividing body and a second fluid dividing body integrally provided, a hydraulic chamber of the first lift cylinder and a hydraulic chamber of the second lift cylinder are connected to the multi-way valve through the first fluid dividing body, and a push rod chamber of the first lift cylinder and a push rod chamber of the second lift cylinder are respectively connected to the multi-way valve through the second fluid dividing body.

[0014] Preferably, the lift housing is further connected to the hydraulic steering system of the tractor.

[0015] Compared with the prior art, the lift housing and the tractor provided by the present invention have the following beneficial effects:

[0016] The present invention designs the lift housing as an independent hydraulic oil tank to realize independent oil supply to the lift hydraulic system, improve the cleanliness and stability of the lift hydraulic system, and effectively reduce the failure rate of the lift; and designs the positions of the oil filling port and the oil outlet of the lift housing to increase the volume and oil filling amount of the lift housing, thereby increasing the lifting force and lifting stroke of the lift. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present invention in detail with reference to the drawings and specific embodiments:

[0018] Figure 1 It is a schematic structural diagram of the lift system in the present invention.

[0019] Figure 2 It is a schematic structural diagram of the lift in the present invention.

[0020] Figure 3 It is a schematic structural diagram of the lift housing from one perspective in the present invention.

[0021] Figure 4 This is a schematic structural view of the lifter housing from another perspective in the present utility model.

[0022] Figure 5 This is an exploded view of the lifter housing in the present utility model.

[0023] Reference numerals: 1, body part; 11, first open window; 12, second open window; 13, rear end face; 14, side wall; 15, front end face; 161, first mounting boss; 162, second mounting boss; 163, first mounting hole; 164, second mounting hole; 165, third mounting hole; 2, first fuel filling pipe; 3, second fuel filling pipe; 4, upper cover plate; 5, lift arm mounting seat; 51, supporting part; 52, sleeve part; 6, partition board; 61, through hole; 100, lifter housing; 200, gearbox; 300, lift pump; 400, multi-way valve; 500, flow dividing block; 600a, first lift cylinder; 600b, second lift cylinder; 700a, first lift arm; 700b, second lift arm; 800, oil filter. Detailed implementation manners

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] To make the drawings concise, only the parts related to the present utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. Additionally, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one" but also means "more than one" situation.

[0026] It should also be further understood that the term "and / or" used in the description of the present application and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0027] In this text, it should be noted that unless otherwise clearly stipulated and defined, the terms "installation", "connection", and "linkage" 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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0029] In order to more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the following will describe the specific implementation manners of this utility model with reference to the attached drawings. Obviously, the attached drawings in the following description are only some embodiments of this utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other implementation manners can also be obtained.

[0030] Embodiment 1

[0031] Refer to Figures 3 to 5 , this embodiment discloses a lift housing 100 for a tractor. Taking the forward direction of the tractor as the front, the lift housing 100 also serves as a lift oil tank. The lift housing 100 is arranged on the upper end face of the gearbox 200. The lift housing 100 includes a main body part 1, a first fuel filling pipe 2, and a second fuel filling pipe 3. The main body part 1 is hermetically arranged on the upper end face of the gearbox 200, and the main body part 1 can cooperate with the upper end face of the gearbox 200 to form a closed cavity for accommodating hydraulic fluid. The first fuel filling pipe 2 is arranged on the rear end face 13 of the main body part 1, and the upper port of the first fuel filling pipe 2 is equal to or higher than the upper end face of the lift housing 100. The second fuel filling pipe 3 is arranged on the side wall 14 of the main body part 1 and extends along a pipeline integrally arranged with the inner wall of the main body part 1 to communicate with the gearbox 200.

[0032] In this embodiment, the lift housing 100 is designed as an independent hydraulic oil tank. The user can add hydraulic oil to the closed cavity formed by the lift housing 100 through the first fuel filling pipe 2 and add hydraulic oil to the gearbox 200 through the second fuel filling pipe 3, forming two independent hydraulic oil tanks. Among them, the lift hydraulic system of the lift housing 100 can supply oil independently, improving the cleanliness and stability of the lift hydraulic system, and effectively reducing the failure rate of the lift.

[0033] Refer to the attached Figure 4 , 5, the upper end surface of the main body part 1 has a first open window 11, and the lower end surface of the main body part 1 has a second open window 12. An upper cover plate 4 is also provided on the first open window 11, and the second open window 12 is sealed and installed on the upper end surface of the transmission 200. The first open window 11 is a semi-open window to reduce the machining surface and ensure the sealing reliability of the upper cover plate 4. Boss structures required for pipeline design are added to all four sides.

[0034] Specifically, a first mounting boss 161 for mounting the flow dividing block 500 is provided on the side wall 14 of the main body part 1, and a second mounting boss 162 for mounting the tube bundle clamp is provided on the front end surface 15 of the main body part 1. A first mounting hole 163 for mounting the oil suction pipe and a second mounting hole 164 for mounting the oil return pipe are also provided on the side wall 14 of the main body part 1, and a third mounting hole 165 for mounting the breather is provided on the upper cover plate 4.

[0035] Refer to the appendix Figure 3 , the lift housing 100 further includes a lift arm mounting seat 5 located below the first oil filling pipe 2. The lift arm mounting seat 5 is used to mount the first lift arm 700a and the second lift arm 700b. The lift arm mounting seat 5 includes a supporting part 51 integrally provided on the rear end surface 13 of the main body part 1 and a sleeve part 52 provided on the supporting part 51 and the rear wall of the main body part 1.

[0036] Aiming at the problem of limited design space of the lift housing 100, in this embodiment, the first oil filling pipe 2 is arranged on the rear end surface 13 of the main body part 1 and above the lift arm mounting seat 5, which can increase the height of the lift housing 100, ensure the maximization of the volume of the lift housing 100, increase the volume and oil filling amount of the lift housing 100, and further increase the lifting force and lifting stroke of the lift.

[0037] Refer to the appendix Figure 5 , a partition 6 is arranged in the closed cavity. The partition 6 is arranged on the lower surface of the upper cover plate 4, and a through hole 61 is opened on the partition 6. In the installed state, the partition 6 is located between the first mounting hole 163 and the second one, divides the closed cavity into two spaces, and is connected through the through hole 61, broadening the circulation path of the hydraulic oil, reducing the circulation speed of the hydraulic oil, and improving the heat dissipation efficiency.

[0038] Embodiment 2

[0039] See Figures 1 to 2 , this embodiment also provides a tractor. Taking the forward direction of the tractor as the front, the tractor includes: a transmission 200, a lift housing 100, a lift pump 300, an oil filter 800, a multi-way valve 400, a flow dividing block 500, a first lift cylinder 600a, a second lift cylinder 600b, a first lift arm 700a and a second lift arm 700b.

[0040] The lift housing 100 has the structure of the lift housing 100 in Embodiment 1, and the lift housing 100 is arranged on the upper end face of the transmission 200. The oil inlet of the lift pump 300 is connected to the lift housing 100 through a pipeline, and an oil filter 800 is also arranged between the lift pump 300 and the lift housing 100. The oil supply port of the multi-way valve 400 is connected to the oil outlet of the lift pump 300 through a pipeline. The flow dividing block 500 is arranged on the first mounting boss 161. The first lift cylinder 600a and the second lift cylinder 600b are arranged behind the transmission 200, and the first lift cylinder 600a and the second lift cylinder 600b are connected to the multi-way valve 400 through the flow dividing block 500. The first lift arm 700a and the second lift arm 700b are respectively rotatably mounted at both ends of the sleeve part 52. The first lift cylinder 600a drives the first lift arm 700a to rotate along the sleeve part 52, and the second lift cylinder 600b drives the second lift arm 700b to rotate along the sleeve part 52.

[0041] Wherein, the flow dividing block 500 includes a first flow dividing body and a second flow dividing body which are integrally arranged. Both the first flow dividing body and the second flow dividing body are three-way joints. The hydraulic chambers of the first lift cylinder 600a and the second lift cylinder 600b are connected to the multi-way valve 400 through the first flow dividing body. The push rod chambers of the first lift cylinder 600a and the second lift cylinder 600b are respectively connected to the multi-way valve 400 through the second flow dividing body. During the lifting process, the first flow dividing body plays a flow dividing role, and the second flow dividing body plays a flow combining role. During the lowering process, the second flow dividing body plays a flow dividing role, and the first flow dividing body plays a flow combining role.

[0042] Moreover, the lift housing 100 is also connected to the hydraulic steering system of the tractor. The steering system and the lift system share hydraulic oil, realizing independent oil supply for the steering system and the lift system, improving the cleanliness and stability of the hydraulic system, and effectively reducing the failure rate of the tractor.

[0043] It will be obvious to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention falling within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A lifter housing is provided on a tractor, with the forward direction of the tractor being the front. It is characterized in that Comprising: A body part, which is hermetically arranged on the upper end surface of the gearbox, and the body part can cooperate with the upper end surface of the gearbox to form a closed cavity for accommodating hydraulic fluid; A first oil filling pipeline, which is arranged on the body part; A second oil filling pipeline, which is arranged on the side wall of the body part and extends along a pipeline integrally arranged with the inner wall of the body part to communicate with the gearbox.

2. The lifter housing according to claim 1, wherein, The upper end surface of the body part has a first open window, and the lower end surface of the body part has a second open window.

3. The lifter housing according to claim 2, characterized in that, A upper cover plate is further equipped on the first open window, and the second open window is hermetically installed on the upper end surface of the gearbox.

4. The lift housing according to claim 3, characterized in that, The lift housing further includes a lift arm mounting seat located below the first oil filling pipeline, and the lift arm mounting seat includes a supporting part integrally arranged on the rear end surface of the body part and a sleeve part arranged on the supporting part and the rear wall of the body part.

5. The lifter housing according to claim 4, characterized in that, A first mounting boss for installing a flow dividing block is arranged on the side wall of the body part, and a second mounting boss for installing a pipe bundle clamp is arranged on the front end surface of the body part.

6. The lifter housing according to claim 5, characterized in that, A first mounting hole for installing an oil suction pipe and a second mounting hole for installing an oil return pipe are further arranged on the side wall of the body part, and a third mounting hole for installing a breather is further arranged on the upper cover plate.

7. The lifter housing according to claim 6, characterized in that, A partition is further arranged on the lower surface of the upper cover plate, and a through hole is opened on the partition.

8. A tractor, characterized in that, Comprising: A gearbox; A lift housing, which has the structure of the lift housing described in claim 7, and the lift housing is arranged on the upper end surface of the gearbox; A lift pump, the oil inlet of which is connected with the lift housing through a pipeline; A multi-way valve, the oil supply port of which is connected with the oil outlet of the lift pump through a pipeline; A flow dividing block, which is arranged on the first mounting boss; A first lift cylinder and a second lift cylinder, which are arranged behind the gearbox, and the first lift cylinder and the second lift cylinder are connected with the multi-way valve through the flow dividing block; A first lift arm and a second lift arm, which are respectively rotatably installed at both ends of the sleeve part, the first lift cylinder drives the first lift arm to rotate along the sleeve part, and the second lift cylinder drives the second lift arm to rotate along the sleeve part.

9. The tractor according to claim 8, wherein, The flow dividing block includes a first fluid dividing body and a second fluid dividing body integrally arranged, the hydraulic chambers of the first lift cylinder and the second lift cylinder are connected with the multi-way valve through the first fluid dividing body, and the push rod chambers of the first lift cylinder and the second lift cylinder are respectively connected with the multi-way valve through the second fluid dividing body.

10. The tractor according to claim 9, characterized in that, The lift housing is further connected with the hydraulic steering system of the tractor.

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