Tractor rear frame lifting device

Abstract

The utility model belongs to the technical field of tractors, and discloses a tractor rear frame lifting device which comprises a rear axle box, a lifting device body is installed on the upper portion of the rear axle box, fixing plates are arranged on the two sides of the rear axle box, rotating rollers are rotatably installed on the fixing plates, and lifting oil cylinders are hinged between the lifting device body and the rotating rollers on the two sides. The lifting device has the advantages that the lifting oil cylinders are arranged outside the lifting device, maintenance and replacement are convenient, maintenance efficiency is improved, the lifting oil cylinders are arranged on the two sides of the rear axle box, the two lifting oil cylinders can share working pressure, and the service life of the lifting oil cylinders is prolonged.

Description

Technical Field

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

[0002] A tractor is a self-propelled power machine used to pull and drive working machinery to complete various mobile operations. In order to facilitate the installation and use of various working machinery, a lifting device is installed on the rear axle box of the tractor. The lifting device is provided with an oil cylinder connected to the working machinery, and the lifting of the working machinery is achieved through the oil cylinder. In the prior art, the oil cylinder is arranged in the middle of the lifting device. The oil cylinder has high working intensity and needs to be replaced and repaired frequently. However, the oil cylinder is installed inside the lifting device, which is not easy to disassemble, has low maintenance efficiency, and takes a long time. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a lifting device for a rear frame of a tractor, wherein a lifting cylinder used for lifting the lifting device is arranged outside the lifting device, so as to facilitate maintenance and replacement.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A lifting device for a rear frame of a tractor comprises a rear axle box, a lifting device is installed on the upper part of the rear axle box, fixed plates are arranged on both sides of the rear axle box, rotating rollers are rotatably installed on the fixed plates, and lifting cylinders are hinged between the lifting device and the rotating rollers on both sides; the lifting cylinders are arranged outside the lifting device, which is convenient for repair and replacement and improves maintenance efficiency.

[0006] The following is a further optimization of the above technical solution by the utility model:

[0007] The fixed plate is provided with a rotating seat, and the rotating roller is arranged in the rotating seat; the lifting cylinder will rotate at a certain angle during operation, and the lifting cylinder rotates through the rotating seat and the rotating roller in cooperation with the lifting cylinder.

[0008] Further optimization: the lifting device includes a base, on which a lifter is rotatably arranged, and lifting arms are arranged at both ends of the lifter. Two articulated seats are arranged on the lifter, and the two articulated seats are located between the two lifting arms; the lifting arm is connected to the operating machinery, and in order not to hinder the installation of the operating machinery, the articulated seat is arranged on the inner side of the lifting arm, and it also facilitates the connection between the lifting cylinder and the articulated seat.

[0009] Further optimization: one end of the lifting cylinder is hinged to the rotating roller, and the other end of the lifting cylinder is hinged to the hinged seat on the same side of the rotating roller; two lifting cylinders are arranged to complete the lifting and lowering of the lifting device, which can share the working pressure of the lifting cylinders and extend the service life of the lifting cylinders.

[0010] Further optimization: the fixing plate is bolted to the rear axle box; the fixing plate and the rear axle box are detachably connected, which is convenient for the tractor to perform other work and has stronger adaptability.

[0011] Further optimization: the rotating seat is fixedly provided with reinforcing ribs in the circumferential direction, and the reinforcing ribs are fixedly connected to the fixing plate; the rotating seat is subjected to greater pressure during operation, and the provision of multiple reinforcing ribs can enhance the pressure resistance of the device, improve the stability of the device, and extend the service life of the device.

[0012] The beneficial effects of the utility model are as follows: the lifting cylinder is arranged outside the lifting device, which is convenient for repair and replacement and improves maintenance efficiency; lifting cylinders are arranged on both sides of the rear axle box, and the two lifting cylinders can share the working pressure and increase the service life of the lifting cylinders.

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0015] Figure 2 It is a structural schematic diagram of a closed state of a specific embodiment of the utility model.

[0016] In the figure: 1-rear axle box; 2-fixed plate; 21-rotating seat; 22-rotating roller; 23-reinforcement rib; 3-lifting cylinder; 4-lifting device; 41-base; 42-lifter; 43-lifting arm; 44-articulated seat. DETAILED DESCRIPTION

[0017] like Figure 1-2 As shown, a tractor rear frame lifting device comprises a rear axle box 1, a lifting device 4 is installed on the upper part of the rear axle box 1, fixed plates 2 are arranged on both sides of the rear axle box 1, rotating rollers 22 are rotatably installed on the fixed plates 2, and lifting cylinders 3 are hinged between the lifting device 4 and the rotating rollers 22 on both sides; the lifting cylinders 3 are arranged outside the lifting device 4, which is convenient for maintenance and replacement and improves maintenance efficiency.

[0018] The fixed plate 2 is provided with a rotating seat 21, and a rotating roller 22 is arranged in the rotating seat 21; the lifting cylinder 3 will rotate at a certain angle during operation, and the lifting cylinder 3 rotates through the rotating seat 21 and the rotating roller 22.

[0019] The lifting device 4 includes a base 41, on which a lifter 42 is rotatably arranged, and lifting arms 43 are arranged at both ends of the lifter 42. Two articulated seats 44 are arranged on the lifter 42, and the two articulated seats 44 are located between the two lifting arms 43; the lifting arm 43 is connected to the operating machinery, and in order not to hinder the installation of the operating machinery, the articulated seat 44 is arranged on the inner side of the lifting arm 43, and it also facilitates the connection between the lifting cylinder 3 and the articulated seat 44.

[0020] One end of the lifting cylinder 3 is hinged to the rotating roller 22, and the other end of the lifting cylinder 3 is hinged to the hinge seat 44 on the same side as the rotating roller 22; two lifting cylinders 3 are set to complete the lifting and lowering of the lifting device 4, which can share the working pressure of the lifting cylinder 3 and extend the service life of the lifting cylinder 3.

[0021] The fixing plate 2 is connected to the rear axle box 1 by bolts; the fixing plate 2 and the rear axle box 1 are detachably connected, which is convenient for the tractor to perform other work and has stronger adaptability.

[0022] The rotating seat 21 is fixedly provided with reinforcing ribs 23 in the circumferential direction, and the reinforcing ribs 23 are fixedly connected to the fixing plate 2; the rotating seat 21 is subjected to relatively large pressure during operation, and the provision of a plurality of reinforcing ribs 23 can enhance the pressure resistance of the device, improve the stability of the device, and extend the service life of the device.

[0023] In this embodiment, the lifting device 4 is installed above the rear axle box 1, and the fixed plate 2 is installed on both sides of the rear axle box 1. Two articulated seats 44 are provided on the lifting device 4, and a rotating roller 22 is provided on the fixed plate 2. One end of the lifting cylinder 3 is hinged to the articulated seat 44, and the other end is hinged to the rotating roller 22. Lifting cylinders 3 are provided on both sides of the rear axle box 1, and the lifting work of the lifting device 4 is completed by two lifting cylinders 3.

[0024] Compared with the existing method of arranging the lifting cylinder 3 inside the lifting device 4, the lifting cylinder 3 arranged outside is convenient for maintenance and replacement. The two lifting cylinders 3 share the pressure during work, extend the service life of the lifting cylinder 3, and improve work efficiency.

[0025] For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the protection scope of the present invention.

Claims

1. A tractor rear frame lifting device, comprising a rear axle box (1), characterized in that: A lifting device (4) is installed on the upper part of the rear axle box (1), and fixed plates (2) are provided on both sides of the rear axle box (1). Rotating rollers (22) are rotatably installed on the fixed plates (2), and lifting cylinders (3) are hinged between the lifting device (4) and the rotating rollers (22) on both sides.

2. A tractor rear frame lifting device according to claim 1, characterized in that: A rotating seat (21) is provided on the fixed plate (2), and a rotating roller (22) is arranged inside the rotating seat (21).

3. A tractor rear frame lifting device according to claim 1, characterized in that: The lifting device (4) comprises a base (41), a lifter (42) is rotatably provided on the base (41), lifting arms (43) are provided at both ends of the lifter (42), two hinged seats (44) are provided on the lifter (42), and the two hinged seats (44) are located between the two lifting arms (43).

4. A tractor rear frame lifting device according to claim 3, characterized in that: One end of the lifting cylinder (3) is hinged to the rotating roller (22), and the other end of the lifting cylinder (3) is hinged to the hinge seat (44) on the same side as the rotating roller (22).

5. The tractor rear frame lifting device according to claim 1, characterized in that: The fixing plate (2) is bolted to the rear axle box (1).

6. A tractor rear frame lifting device according to claim 2, characterized in that: The rotating seat (21) is fixedly provided with reinforcing ribs (23) in the circumferential direction, and the reinforcing ribs (23) are fixedly connected to the fixing plate (2).

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