Rear suspension lifting device of tractor

Abstract

The utility model relates to the field of agricultural machinery, in particular to a rear suspension lifting device of a tractor, which is characterized in that an upper pull rod and a lower pull rod are hinged at the rear part of a vehicle body, the upper pull rod is positioned above the lower pull rod, a lifting rod is hinged between the upper pull rod and the lower pull rod, and a lifting oil cylinder for pushing and pulling the upper pull rod to swing up and down is hinged on the vehicle body; a shrinkage sleeve is installed on the rear portion of the vehicle body, a traction rod is in threaded connection with the interior of the shrinkage sleeve, a traction seat is arranged on the traction rod, the rear end of the traction rod extends into the traction seat and is in running fit with the traction seat, a limiting hole is formed in the traction seat, the rear end of the traction rod penetrates through the limiting hole and extends into the traction seat, and a limiting disc is installed at the end, extending into the traction seat, of the traction rod. According to the rear suspension lifting device of the tractor, the lifting force transmission efficiency of the lifting device is improved, the traction rod is used for driving the traction base to move front and back, the front-back distance of the traction base is flexibly adjusted, and the operation precision and the operation convenience are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery field, concretely relates to a tractor rear suspension lifting device. BACKGROUND

[0002] As an important mechanical equipment in agricultural production, tractors are widely used in farmland plowing, seeding, harvesting and other operations. In order to improve the operation efficiency and adaptability of the tractor, the design of the rear suspension lifting device is particularly important. The traditional tractor rear suspension lifting device usually adopts a simple mechanical structure, which has the problems of insufficient lifting force, inconvenient operation, poor adaptability and the like, and is difficult to meet the demand of modern agriculture for efficient and accurate operation.

[0003] The existing tractor rear suspension lifting device usually comprises an upper pull rod, a lower pull rod and a lifting cylinder and the like, and the lifting cylinder is used to realize the lifting of the suspension device through the extension and retraction. However, due to the unreasonable installation position of the existing lifting cylinder, the lifting force transmission efficiency is low; the connection mode of the traction rod and the traction seat is not stable enough, which is easy to loosen or fall off during operation, affecting the operation safety and stability. In addition, the rear part of the tractor is provided with a traction seat for connecting a vehicle hopper, the vehicle hopper is provided with a traction hook, and the traction hook and the traction seat are connected through a pin shaft. When the pin shaft is connected, the hole positions need to be aligned, but due to the large weight of the vehicle hopper and the tractor, the vehicle is difficult to move, and the hole positions are often difficult to match, which needs to be improved. SUMMARY

[0004] The utility model aims at the above -mentioned purpose provides a tractor rear suspension lifting device with high stability and large carrying capacity.

[0005] In order to achieve the above-mentioned purpose, the utility model discloses a tractor rear suspension lifting device, which has the following structural characteristics: the rear part of the vehicle body is hingedly connected with an upper pull rod and a lower pull rod, the upper pull rod is located above the lower pull rod, a lifting rod is hingedly connected between the upper pull rod and the lower pull rod, a lifting cylinder for pushing and pulling the upper pull rod to swing up and down is hingedly connected to the vehicle body, a contraction sleeve is installed at the rear part of the vehicle body, a traction rod is screwedly connected in the contraction sleeve, a traction seat is arranged on the traction rod, and the rear end of the traction rod extends into the traction seat and rotates with the traction seat.

[0006] Through the pushing and pulling action of the lifting cylinder, the upper pull rod can swing up and down, thereby driving the movement of the lifting rod and the lower pull rod, realizing the lifting function of the suspension device, making the lifting operation of the suspension device more flexible and accurate, facilitating the adjustment of the height of the rear part of the tractor and adapting to different operation requirements. The traction rod is screwedly connected in the contraction sleeve, so that the extension and retraction adjustment of the traction rod can be realized, and the pin shaft connection of the vehicle hopper and the traction seat can be completed without moving the vehicle body.

[0007] The rear end of the traction rod is inserted into the traction seat through the limiting hole.

[0008] The traction rod is inserted into the traction seat through the limiting hole.

[0009] The rear end of the traction rod is inserted into the traction seat through the limiting hole.

[0010] The front end of the lower pull rod is hinged to the support seat, making the movement of the lower pull rod more stable and enhancing the overall coordination and stability of the suspension device.

[0011] The upper end of the lifting rod is hinged to the rear end of the upper pull rod, and the lower end of the lifting rod is hinged to the rear end of the lower pull rod.

[0012] The traction seat is installed with a pin shaft, which is used to fix the connection between the traction seat and the traction hook.

[0013] The inner wall of the contraction sleeve and the outer wall of the traction rod are provided with threads that can cooperate with each other, and the front end of the traction rod is inserted into the contraction sleeve and the threads are matched.

[0014] The upper pull rod and the lower pull rod are each provided with two groups, which are spaced apart from each other, and the traction seat is located between the two groups.

[0015] The traction rod is provided with a rotating part for cooperation with a wrench, and the rotating part is hexagonal in shape.

[0016] The utility model discloses beneficial effect lies in: through optimizing upper pull rod, lower pull rod, lifting oil cylinder, tow bar and tow seat etc. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of the utility model;

[0018] Figure 2 It is the overhead structure schematic diagram of the utility model;

[0019] Figure 3 It is the installation structure schematic diagram of tow seat;

[0020] Figure 4 It is the installation structure schematic diagram of the utility model.

[0021] In the drawing: car body 1, upper pull rod 2, lifting oil cylinder 3, support seat 4, lower pull rod 5, lifting rod 6, tow seat 7, pin shaft 8, limit disc 9, tow bar 10, contraction cover 11, screwing portion 12. DETAILED DESCRIPTION

[0022] The specific embodiment of the utility model is described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0023] In the description of the present application, it needs to be understood that the orientation or position relation indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0025] In the description of the present application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] The following is the preferred embodiment of the present application in conjunction with the drawings.

[0027] A tractor rear suspension lifting device, the rear of the vehicle body 1 is hinged with an upper pull rod 2 and a lower pull rod 5, the upper pull rod 2 is above the lower pull rod 5, a lifting rod 6 is hinged between the upper pull rod 2 and the lower pull rod 5, a lifting oil cylinder 3 for pushing and pulling the upper pull rod 2 to swing up and down is hinged on the vehicle body 1, a contraction sleeve 11 is installed at the rear of the vehicle body 1, a traction rod 10 is threadedly connected in the contraction sleeve 11, a traction seat 7 is arranged on the traction rod 10, and the rear end of the traction rod 10 extends into the traction seat 7 and rotates with the traction seat 7. Referring to the drawings Figure 1 , through the pushing and pulling action of the lifting oil cylinder 3, the upper pull rod 2 can swing up and down, thereby driving the movement of the lifting rod 6 and the lower pull rod 5, realizing the lifting function of the suspension device, making the lifting operation of the suspension device more flexible and accurate, facilitating the adjustment of the height of the rear of the tractor, and adapting to different operation requirements. The traction rod 10 is threadedly connected in the contraction sleeve 11, so that the extension adjustment of the traction rod 10 can be realized, without moving the vehicle body 1, the pin shaft 8 connection of the car hopper and the traction seat 7 can be completed.

[0028] Referring to the drawings Figure 1 , regarding the connection structure of the traction rod 10 and the traction seat 7, the traction seat 7 is provided with a limiting hole, and the rear end of the traction rod 10 extends into the traction seat 7 through the limiting hole. The end of the traction rod 10 extending into the traction seat 7 is provided with a limiting disc 9, and the limiting disc 9 is located in the traction seat 7. The limiting disc 9 limits the movement range of the traction rod 10, ensuring the stable position of the traction rod 10 in the traction seat 7. When the length of the traction rod 10 is adjusted in place, the traction seat 7 is rotated at this time, aligned with the hole position of the traction hook, and then the pin shaft 8 is inserted.

[0029] Referring to the drawings Figure 3The rear part of the vehicle body 1 is provided with a support seat 4, and the lower end of the lifting oil cylinder 3 is installed on the support seat 4. The support seat 4 provides a stable support point for the lifting oil cylinder 3, ensuring that the lifting oil cylinder 3 can stably push and pull the upper pull rod 2 during work. The working efficiency and stability of the lifting oil cylinder 3 are improved, and the equipment failure caused by unstable support is reduced. The front end of the lower pull rod 5 is hinged to the support seat 4, making the movement of the lower pull rod 5 more stable, enhancing the overall coordination and stability of the suspension device. The lower pull rod 5 is connected to agricultural tools such as seeders or fertilizers, and when the lifting oil cylinder 3 extends or retracts, the lower pull rod 5 swings up and down, thereby driving the agricultural tools to move up and down. The upper end of the lifting rod 6 is hinged to the rear end of the upper pull rod 2, and the lower end of the lifting rod 6 is hinged to the rear end of the lower pull rod 5. The lifting rod 6 connects the upper pull rod 2 and the lower pull rod 5 through hinging, forming a linkage mechanism, so that the upper pull rod 2 and the lower pull rod 5 can move synchronously. The movement efficiency and coordination of the suspension device are improved, ensuring the synchronicity and stability of the lifting operation.

[0030] Referring to the accompanying drawings Figure 2 A pin shaft 8 is installed on the traction seat 7, which is used to fix the traction seat 7 and the traction hook connection. The traction hook is provided with a connecting hole, which is matched with the pin shaft 8 hole of the traction seat 7 after being inserted into the pin shaft 8, thereby completing the cooperation of the traction seat 7 and the pin shaft 8 of the traction hook.

[0031] Referring to the accompanying drawings Figure 1 The upper pull rod 2 and the lower pull rod 5 are each provided with two groups, which are spaced apart from each other, and the traction seat 7 is located between the two groups. The upper pull rod 2 and the lower pull rod 5 each use an independent lifting oil cylinder 3, enhancing the stability and carrying capacity of the suspension device, and the traction seat 7 is located in the middle position, making the traction force distribution more uniform. The traction rod 10 is provided with a rotating part 12 for matching with a wrench, which is hexagonal in shape and matched with a hexagonal wrench. The rotating part 12 can be used to rotate the traction rod 10 by cooperating with the wrench.

[0032] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, which should also be considered as the protection scope of the present application.

Claims

1. A tractor rear-mounted lifting device, characterized in that, The rear part of the vehicle body (1) is hingedly connected with an upper pull rod (2) and a lower pull rod (5), the upper pull rod (2) is located above the lower pull rod (5), a lifting rod (6) is hingedly connected between the upper pull rod (2) and the lower pull rod (5), the vehicle body (1) is hingedly connected with a lifting oil cylinder (3) for pushing and pulling the upper pull rod (2) to swing up and down, a contraction sleeve (11) is installed on the rear part of the vehicle body (1), a traction rod (10) is threadedly connected in the contraction sleeve (11), a traction seat (7) is arranged on the traction rod (10), the rear end of the traction rod (10) extends into the traction seat (7) and is rotationally connected with the traction seat (7).

2. The tractor rear-mounted lifting device of claim 1, wherein, The traction seat (7) is provided with a limiting hole, the rear end of the traction rod (10) extends into the traction seat (7) through the limiting hole.

3. The tractor rear-mounted lifting device of claim 2, wherein, The end of the traction rod (10) extending into the traction seat (7) is provided with a limiting disc (9), and the limiting disc (9) is located in the traction seat (7).

4. The tractor rear-mounted lifting device of claim 1, wherein, The rear part of the vehicle body (1) is provided with a supporting seat (4), and the lower end of the lifting oil cylinder (3) is installed on the supporting seat (4).

5. The tractor rear-mounted lifting device of claim 4, wherein, The front end of the lower pull rod (5) is hingedly connected to the supporting seat (4).

6. The tractor rear-mounted lifting device of claim 1, wherein, The upper end of the lifting rod (6) is hingedly connected to the rear end of the upper pull rod (2), and the lower end of the lifting rod (6) is hingedly connected to the rear end of the lower pull rod (5).

7. The tractor rear-mounted lifting device of claim 1, wherein, The traction seat (7) is provided with a pin shaft (8).

8. The tractor rear-mounted lifting device of claim 1, wherein, The inner wall of the contraction sleeve (11) and the outer wall of the traction rod (10) are provided with threads capable of cooperating with each other, the front end of the traction rod (10) is inserted into the contraction sleeve (11) and the two are threadedly connected.

9. The tractor rear-mounted lifting device of claim 1, wherein, The upper pull rod (2) and the lower pull rod (5) are both provided with two groups, which are left and right spaced apart, and the traction seat (7) is located between the two groups of upper pull rods (2) and lower pull rods (5).

10. The tractor rear-mounted lifting device of claim 1, wherein, The traction rod (10) is provided with a screwing part (12) for cooperating with a wrench, and the screwing part (12) is hexagonal.

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