Lifting device and tractor

Abstract

The utility model provides a lifting device and a tractor. Comprising a rear axle shell, a lifting arm, a clutch shell, a lifting oil cylinder, a gap part and a mud blocking prevention piece. The clutch shell is of a cylindrical structure, and the end face of the clutch shell is adjacent to the rear axle shell. The lifting oil cylinder is adjacent to the cylindrical surface of the clutch shell; the gap part is formed between the lifting oil cylinder and the cylindrical surfaces of the rear axle shell and the clutch shell; the anti-mud-blocking piece is arranged in the gap part and can separate the gap part. The mud blocking prevention pieces are arranged among the rear axle shell, the clutch shell and the lifting oil cylinder, the situation that mud blocks are accumulated in a gap between the hydraulic oil cylinder and the rear axle shell, large resistance is generated on the oil cylinder, and the service life of the oil cylinder is affected is avoided, and the working reliability of the oil cylinder in a tractor hydraulic system is improved.

Description

Technical Field

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

[0002] A three-point hitch, such as one for suspending agricultural implements, is installed at the front and / or rear of the tractor. This system consists of a pair of bottom links, a top link, a pair of lift arms that drive the bottom links, and a pair of lift cylinders that drive the lift arms. To ensure the stability of the three-point hitch, the lift cylinders are typically mounted directly on the rear axle housing. To ensure hydraulic output, some high-horsepower tractors require a larger cylinder diameter to achieve greater hydraulic output. This reduces the clearance between the lift cylinders and the rear axle housing, making it prone to the accumulation of mud and other debris.

[0003] When the lift cylinder is operating, it not only moves up and down but also oscillates slightly forward and backward. If debris, such as mud or other debris, accumulates between the lift cylinder and the rear axle housing, especially hard soil and rock, it can create significant resistance to the cylinder's operation, exerting significant shear force on the cylinder pin. This can increase the risk of the pin breaking and shorten the cylinder's service life.

[0004] In the prior art, it is necessary to provide a lifting device to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of the utility model is to provide a lifting device and a tractor.

[0006] According to one aspect of the utility model, a lifting device is provided, including: a rear axle housing; a first clutch housing, the first clutch housing is a cylindrical structure, and the end face of the first clutch housing is adjacent to the rear axle housing; a first lifting cylinder, the first lifting cylinder and the cylindrical surface of the first clutch housing are adjacent to each other; a first gap portion, the first gap portion is formed between the first lifting cylinder and the cylindrical surfaces of the rear axle housing and the first clutch housing; a first anti-mud blockage member, the first anti-mud blockage member is installed in the first gap portion and can isolate the first gap portion.

[0007] Preferably, one side of the first anti-mud blockage member is mounted on the first clutch housing and / or the rear axle housing, and the other side of the first anti-mud blockage member is deformable and always in contact with the side surface of the cylinder body of the first lifting cylinder.

[0008] Preferably, the first anti-mud blocking member includes a mounting plate and an anti-mud blocking rubber strip, the mounting plate is an arc-shaped structure on the side close to the first lifting cylinder, and the anti-mud blocking rubber strip is detachably mounted on the arc-shaped structure.

[0009] Preferably, the anti-mud-blocking rubber strip includes a main body portion with a cylindrical structure, a clamping portion arranged on one side of the main body portion close to the mounting plate, and an abutting portion arranged on the other side of the main body portion, the clamping portion includes a first lip portion and a second lip portion formed in the circumferential direction of the main body portion, and the mounting plate is clamped between the first lip portion and the second lip portion.

[0010] Preferably, the mounting plate includes a first mounting portion which is arranged on one side of the mounting plate close to the rear axle housing and bent upward, and a second mounting portion which is arranged on the other side of the mounting plate and protrudes outward, the first mounting portion being fixed to the mounting hole on the rear axle housing, and the second mounting portion being connected to the mounting boss mounted on the first clutch housing.

[0011] Preferably, one side of the first anti-mud blocking member is mounted on the cylinder body of the first lifting cylinder, and the other side of the first anti-mud blocking member is deformable and is always in contact with the first clutch housing and the rear axle housing.

[0012] Preferably, the first anti-mud blocking member includes a clamp and an anti-mud blocking rubber body, the anti-mud blocking rubber body is mounted on the cylinder body of the first lifting cylinder through the clamp, and the outer contour of the anti-mud blocking rubber body is adapted to the first gap portion.

[0013] Preferably, a reinforcing rib plate is provided below the first gap portion, the reinforcing rib plate is located between the rear axle housing and the first clutch housing, and at least one through hole is provided on the reinforcing rib plate.

[0014] Preferably, it also includes: a second clutch housing, the second clutch housing is a cylindrical structure, the end face of the second clutch housing is arranged adjacent to the rear axle housing, and the first clutch housing and the second clutch housing are respectively located on both sides of the rear axle housing; a second lifting cylinder, the second lifting cylinder is arranged adjacent to the cylindrical surface of the second clutch housing; a second gap portion, the second gap portion is formed between the second lifting cylinder and the cylindrical surfaces of the rear axle housing and the second first clutch housing; a second anti-mud blocking part, the second anti-mud blocking part is arranged in the second gap portion and can isolate the second gap portion.

[0015] According to another aspect of the present invention, a tractor is provided, comprising the above-mentioned lifting device.

[0016] Compared with the prior art, the lifting device provided by the present invention has the following beneficial effects:

[0017] The utility model discloses to provide the anti-mud blocking part between the rear axle housing, the clutch housing and the lifting oil cylinder, so as to avoid the problem that mud blocks accumulate in the gap between the hydraulic cylinder and the rear axle housing, thereby preventing the generation of large resistance to the oil cylinder, which affects the service life of the oil cylinder, and generates large shear force on the oil cylinder pin shaft, which may cause the risk of breakage, thereby improving the reliability of the oil cylinder in the tractor hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] Figure 1 This is a schematic structural diagram of the lifting device in Example 1 of the present utility model;

[0020] Figure 2 This is a schematic structural diagram of the rear axle housing in the present invention;

[0021] Figure 3 This is a partial enlarged view of the reinforcing rib plate in the present invention;

[0022] Figure 4 This is a schematic structural diagram of the first anti-mud blocking member in Example 1 of the present utility model;

[0023] Figure 5 This is a schematic diagram of the explosion of the second anti-mud blockage component in Example 1 of the present utility model.

[0024] Figure 6 This is a schematic structural diagram of the lifting device in Example 2 of the present utility model;

[0025] Figure 7 This is a schematic structural diagram of the first anti-mud blocking member in Example 2 of the present utility model;

[0026] Explanation of the accompanying drawings: 1. rear axle housing; 11. lifting arm mounting seat; 12. mounting hole; 2a. first lifting arm; 2b. second lifting arm; 3a. first clutch housing; 3b. second clutch housing; 31. reinforcing rib plate; 311. through hole; 32. mounting boss; 4a. first lifting cylinder mounting seat; 4b. second lifting cylinder mounting seat; 5a. first lifting cylinder; 5b. second lifting cylinder; 6a. first anti-mud blocking member; 6b. second anti-mud blocking member; 61. mounting plate; 62. anti-mud blocking rubber strip; 63. clamp; 64. anti-mud blocking rubber body; 611. arc-shaped structure; 612. first mounting portion; 613. second mounting portion; 621. main body; 622. clamping portion; 623. abutting portion; 622a. first lip; 622b. second lip; 7a. first lower tie rod mounting seat. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0029] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0030] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0031] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0033] Example 1

[0034] See also Figures 1 to 5This embodiment provides a lifting device applied to a three-point suspension device of a tractor. When a user rides on the tractor located on the ground, the direction the user is facing is defined as the front, the direction facing away is defined as the rear, the direction to the left is defined as the left, the direction to the right is defined as the right, the direction close to the ground is defined as the bottom, and the direction away from the ground is defined as the top.

[0035] Corresponding to the lifting device, the lifting device includes a rear axle housing 1, the front end of the rear axle housing 1 is connected to the transition bridge or engine of the tractor, the rear end of the rear axle housing 1 is a three-point suspension device, and wet clutches and half-axle structures connected to the left rear wheel and the right rear wheel are respectively provided on the left and right sides of the rear axle housing 1, and a lifting arm mounting seat 11 is provided above the rear axle housing 1.

[0036] See attached Figure 1 , Attachment Figure 2 The lifting device also includes a first lifting arm 2a, a first clutch housing 3a, a first lifting cylinder 5a, a first gap, and a first anti-mud blockage feature 6a, located on one side of the rear axle housing 1. One end of the first lifting arm 2a is rotatably mounted on a lifting arm mounting base 11. The first clutch housing 3a is cylindrical, with its end face positioned adjacent to the rear axle housing 1. A first lifting cylinder mounting base 4a is provided on the first clutch housing 3a. The first lifting cylinder 5a is positioned adjacent to the cylindrical surface of the first clutch housing 4a. Specifically, the cylinder base of the first lifting cylinder 5a is movably connected to the first lifting cylinder mounting base 4a, and the piston rod of the first lifting cylinder 5a is movably connected to the first lifting arm 2a. A first gap is formed between the first lifting cylinder 5a and the cylindrical surfaces of the rear axle housing 1 and the first clutch housing 3a. The first anti-mud blockage feature 6a is mounted above the first gap and can block the first gap.

[0037] Specifically, one side of the first anti-mud blockage member 6a is mounted on the first clutch housing 3a and / or the rear axle housing 1, and the other side of the first anti-mud blockage member 6a is deformable and always in contact with the cylinder body side of the first lifting cylinder 5a.

[0038] The lifting device also includes a second lifting arm 2b, a second clutch housing 3b, a second lifting cylinder 5b, and a second anti-mud blocking member 6b, located on the other side of the rear axle housing 1. One end of the second lifting arm 2b is rotatably mounted on a lifting arm mounting base 11. The second clutch housing 3b is cylindrical, with its end surface positioned adjacent to the rear axle housing 1. A second lifting cylinder mounting base 4b is provided on the second clutch housing 3b. The second lifting cylinder 5b is positioned adjacent to the cylindrical surface of the first clutch housing 4a. Specifically, the cylinder base of the second lifting cylinder 5b is movably connected to the second lifting cylinder mounting base 4b, and the piston rod of the second lifting cylinder 5b is movably connected to the second lifting arm 2b. A second gap is formed between the second lifting cylinder 5b and the cylindrical surfaces of the rear axle housing 1 and the second clutch housing 3b. The second anti-mud blocking member 6b is mounted above the second gap and can block the second gap. Specifically, one side of the second anti-mud blockage member 6b is mounted on the second clutch housing 3b and / or the rear axle housing 1, and the other side of the second anti-mud blockage member 6b is deformable and always in contact with the cylinder body side of the second lifting cylinder 5b.

[0039] By arranging anti-mud blocking parts between the rear axle housing 1, the clutch housing and the lifting cylinder, it is possible to prevent mud from accumulating in the gap between the hydraulic cylinder and the rear axle housing 1, thereby preventing the cylinder from generating greater resistance and affecting the service life of the cylinder and generating greater shear force on the cylinder pin shaft, thereby posing a risk of breakage. This improves the reliability of the cylinder operation in the tractor hydraulic system.

[0040] Since the first lifting arm 2a, the first clutch housing 3a, the first lifting cylinder 5a, the first anti-mud blockage part 6a and the second lifting arm 2b, the second clutch housing 3b, the second lifting cylinder 5b, the second anti-mud blockage part 6b have the same structure and are arranged in symmetrical directions, this embodiment only describes one side in detail.

[0041] See attached Figure 4 The first anti-mud jam component 6a consists of a mounting plate 61 and an anti-mud jam strip 62. The mounting plate 61, near the first lift cylinder 5a, has an arc-shaped structure 611, which is concentric with the circumference of the first lift cylinder 5a. The anti-mud jam strip 62 is made of rubber, while the mounting plate 61 is made of sheet metal. Compared to rubber components, the anti-mud jam strip 62 offers more reliable load-bearing properties and a lower preload after installation, ensuring consistent installation across the production line. The anti-mud jam strip 62 is a consumable component and is detachably mounted on the arc-shaped structure 611, facilitating subsequent replacement and maintenance.

[0042] By analyzing the swing angle of the first lifting cylinder 5a during operation, the swing stroke of the cylinder at the installation position is calculated, and then the installation position and installation structure of the installation plate 61 are determined. Figure 5The mounting plate 61 includes a first mounting portion 612, bent upward, located on one side of the mounting plate 61 near the rear axle housing 1, and a second mounting portion 613, protruding outward, located on the other side of the mounting plate 61. Accordingly, the rear axle housing 1 has mounting holes 12 formed on its side, and the first mounting portion 612 is fixedly mounted to the mounting holes 12 via screws. The first clutch housing 3a has a mounting boss 32, and the second mounting portion 613 is fixedly mounted to the mounting boss 32 via screws.

[0043] See attached Figure 5 The anti-mud jam strip 62 includes a main body 621 having a cylindrical structure, a clamping portion 622 provided on one side of the main body 621 close to the mounting plate 61, and an abutting portion 623 provided on the other side of the main body 621. The clamping portion 622 includes a first lip 622a and a second lip 622b formed in the circumferential direction of the main body 621, and the mounting plate 61 is clamped between the first lip 622a and the second lip 622b. The anti-mud jam strip 62 is made of rubber and has sufficient compression margin while ensuring a certain support strength, ensuring that the first lifting cylinder 5a will not be subject to large resistance during operation. After installation, the first anti-mud jam member 6a has a pre-compression amount on the first lifting cylinder 5a. Specifically, the anti-mud jam strip 62 has a deformation compression amount of 6 to 9 mm. Preferably, the anti-mud jam strip 62 has a deformation compression amount of 7 to 8 mm, thereby ensuring that the anti-mud jam effect is better exerted during the cylinder swing cycle.

[0044] See attached Figure 3 A first lower tie rod mounting seat 7a and a second lower tie rod mounting seat are provided on the first clutch housing 3a for mounting the first lower tie rod and the second lower tie rod (not shown in the figure). In order to improve the structural strength between the first clutch housing 3a and the rear axle housing 1, a reinforcing rib plate 31 is installed below the first lifting cylinder mounting seat 4a and above the first lower tie rod mounting seat 7a. The reinforcing rib plate 31 is located between the rear axle housing 1 and the first clutch housing 3a.

[0045] However, the gap between the first lift cylinder 5a and the rear axle housing 1 and the first clutch housing 3a is not completely sealed, so small particles of dirt can still enter the gap between the first lift cylinder 5a, the rear axle housing 1, and the first clutch housing 3a. Therefore, at least one through-hole 311 is provided in the reinforcing rib plate 31 to remove small particles of dirt and prevent them from accumulating into large lumps that could hinder the normal operation of the first lift cylinder 5a.

[0046] Example 2

[0047] See attached Figures 6 to 7This embodiment differs from the first embodiment in the structure and installation method of the anti-mud blocking member. Other structural features are the same as those of the first embodiment and will not be described in detail. Furthermore, since the first anti-mud blocking member 6a and the second anti-mud blocking member 6b have the same structure and are symmetrically positioned, this embodiment will only describe one side of the anti-mud blocking member.

[0048] Specifically, one side of the first anti-mud blocking member 6a is mounted on the cylinder body of the first lifting cylinder, and the other side of the first anti-mud blocking member is deformable and always in contact with the first clutch housing 3a and the rear axle housing 1.

[0049] See attached Figure 7 The first anti-mud jam member 6a includes a clamp 63 and an anti-mud jam rubber member 64. The anti-mud jam rubber member 64 is mounted on the cylinder body of the first lift cylinder 5a via the clamp 63. The anti-mud jam rubber member 64 is adaptively designed so that its outer contour matches the first gap. The anti-mud jam rubber member 64 is a rubber member that, after installation, pre-compresses the lift cylinder, ensuring that it effectively prevents mud jams during the lift cylinder's swing cycle.

[0050] In this embodiment, the main body of the first anti-mud blocking member 6a is an anti-mud blocking rubber body 64, which has a simple structure. For lifters of different sizes, the user can analyze the swing angle of the lifting cylinder during operation, calculate the swing stroke of the lifting cylinder at the installation position, install the anti-mud blocking rubber body 64 at a suitable position in the first gap, and design the shape and structure of the anti-mud blocking rubber body 64 to have sufficient compression margin while ensuring a certain support strength, to ensure that there will be no large resistance during the operation of the lifting cylinder.

[0051] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above 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 that fall within the scope of the appended claims and their equivalents.

Claims

1. A lifting device, characterized in that: include: rear axle housing; a first clutch housing, the first clutch housing being a cylindrical structure, and an end surface of the first clutch housing being disposed adjacent to the rear axle housing; a first lifting cylinder disposed adjacent to the cylindrical surface of the first clutch housing; a first gap portion formed between the first lift cylinder and the cylindrical surfaces of the rear axle housing and the first clutch housing; The first anti-mud blockage member is disposed in the first gap portion and is capable of blocking the first gap portion.

2. The lifting device according to claim 1, characterized in that One side of the first anti-mud blockage member is mounted on the first clutch housing and / or the rear axle housing, and the other side of the first anti-mud blockage member is deformable and always in contact with the side surface of the cylinder body of the first lifting cylinder.

3. The lifting device according to claim 2, characterized in that The first anti-mud blocking component includes a mounting plate and an anti-mud blocking rubber strip. The mounting plate is an arc-shaped structure on the side close to the first lifting cylinder, and the anti-mud blocking rubber strip is detachably mounted on the arc-shaped structure.

4. The lifting device according to claim 3, characterized in that The anti-mud-blocking rubber strip includes a main body portion with a cylindrical structure, a clamping portion arranged on one side of the main body portion close to the mounting plate, and an abutting portion arranged on the other side of the main body portion. The clamping portion includes a first lip portion and a second lip portion formed on the circumference of the main body portion, and the mounting plate is clamped between the first lip portion and the second lip portion.

5. The lifting device according to claim 4, characterized in that The mounting plate includes a first mounting portion that is arranged on one side of the mounting plate close to the rear axle housing and bent upward, and a second mounting portion that is arranged on the other side of the mounting plate and protrudes outward, the first mounting portion is fixed to the mounting hole on the rear axle housing, and the second mounting portion is connected to the mounting boss installed on the first clutch housing.

6. The lifting device according to claim 1, characterized in that One side of the first anti-mud blocking member is mounted on the cylinder body of the first lifting cylinder, and the other side of the first anti-mud blocking member is deformable and always in contact with the first clutch housing and the rear axle housing.

7. The lifting device according to claim 6, characterized in that The first anti-mud blocking member includes a clamp and an anti-mud blocking rubber body. The anti-mud blocking rubber body is mounted on the cylinder body of the first lifting cylinder through the clamp, and the outer contour of the anti-mud blocking rubber body is adapted to the first gap portion.

8. The lifting device according to claim 1, characterized in that A reinforcing rib plate is provided below the first gap portion. The reinforcing rib plate is located between the rear axle housing and the first clutch housing, and at least one through hole is provided on the reinforcing rib plate.

9. The lifting device according to claim 1, characterized in that Also includes: a second clutch housing, the second clutch housing being a cylindrical structure, an end surface of the second clutch housing being disposed adjacent to the rear axle housing, the first clutch housing and the second clutch housing being located on either side of the rear axle housing; a second lifting cylinder disposed adjacent to the cylindrical surface of the second clutch housing; a second gap portion formed between the second lift cylinder and the cylindrical surfaces of the rear axle housing and the second and first clutch housings; The second anti-mud blockage member is disposed in the second gap portion and is capable of blocking the second gap portion.

10. A tractor, characterized in that: Comprising the lifting device according to any one of claims 1 to 9.

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