Hydraulic lifting device of suspension system

Abstract

The utility model discloses a suspension system hydraulic lifting device which comprises a support arm and a frame, a connecting shaft is arranged on the support arm, an adjusting arm is hinged in the support arm through the connecting shaft, a connecting hole is formed in one end, far away from the connecting shaft, of the adjusting arm, and the rear side of the support arm is fixedly connected with the frame. A fixing rod is rotationally connected to the portion, located above the adjusting arm, in the supporting arm, a connecting ring is rotationally connected to the fixing rod, two hydraulic cylinders including the first hydraulic cylinder and the second hydraulic cylinder and a telescopic rod are fixedly connected to the outer side of the connecting ring, and the telescopic rod is located between the first hydraulic cylinder and the second hydraulic cylinder; the lower end of the first hydraulic cylinder, the lower end of the second hydraulic cylinder and the lower end of the telescopic rod are hinged to the upper side of the adjusting arm. By means of the structure, the problems that a single hydraulic oil cylinder and a hydraulic connecting rod support are prone to breakage or bending and even incline in the lifting process, and consequently the oil cylinder cannot work normally are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle suspension, in particular to a hydraulic lifting device of a suspension system. Background Art

[0002] The hydraulic lifting device of the suspension system is the tractor hydraulic suspension system. The function of the tractor hydraulic suspension system is to hang and lift farm implements. The hydraulic suspension system has a compact structure, flexible operation, and good maneuverability. It can easily add weight to the drive wheels, thereby improving the tractor's adhesion performance and giving full play to the tractor's driving performance. There are three ways to arrange the suspended farm implements on the tractor, namely front suspension, rear suspension and side suspension.

[0003] The existing tractor suspension hydraulic lifting system is generally equipped by the original factory, with a single-rod hydraulic cylinder structure, and the internal hydraulic cylinder is a cast iron part. When the external load is too large and the pressure inside the cylinder is high, the cylinder body is prone to cracking and cannot work anymore. The single hydraulic cylinder and the hydraulic connecting rod support are prone to break or bend, and even tilt during the lifting process, causing the cylinder to not work normally. Once any of the above faults occurs, the entire system needs to be disassembled for repair, which increases the repair cost and is time-consuming and labor-intensive. Therefore, a suspension system hydraulic lifting device is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hydraulic lifting device for a suspension system, which solves the problem that a single hydraulic cylinder and a hydraulic connecting rod support are easily broken or bent, and may even tilt during the lifting process, causing the cylinder to be unable to work normally.

[0005] The utility model also provides a hydraulic lifting device with the above-mentioned suspension system, including: a support arm and a frame, the support arm is provided with a connecting shaft, an adjusting arm is hinged in the support arm through the connecting shaft, a connecting hole is provided at one end of the adjusting arm away from the connecting shaft, the rear side of the support arm is fixedly connected to the frame, a fixing rod is rotatably connected in the support arm above the adjusting arm, a connecting ring is rotatably connected on the fixing rod, a hydraulic cylinder and a telescopic rod are fixedly connected to the outside of the connecting ring, there are two hydraulic cylinders, namely a first hydraulic cylinder and a second hydraulic cylinder, the telescopic rod is located in the middle of the first hydraulic cylinder and the second hydraulic cylinder, and is sleeved with a spring, and the lower ends of the first hydraulic cylinder, the second hydraulic cylinder and the telescopic rod are all hinged to the upper side of the adjusting arm.

[0006] According to the hydraulic lifting device of a suspension system, a buffer is fixedly connected to the adjusting arm located on the left side of the hydraulic cylinder and the telescopic rod, and the upper end of the buffer is fixedly connected to the supporting arm.

[0007] According to the hydraulic lifting device of a suspension system, a wheel is fixedly connected to the outer side of the connecting hole.

[0008] According to the hydraulic lifting device of a suspension system, hydraulic oil pipes are fixedly connected to the first hydraulic cylinder and the second hydraulic cylinder respectively.

[0009] According to the hydraulic lifting device of a suspension system, the connecting shaft and the fixing rod are arranged parallel to each other.

[0010] The utility model has the following beneficial effects:

[0011] In the utility model, a fixed rod is provided in the support arm, and the first hydraulic cylinder, the second hydraulic cylinder and the telescopic rod are installed on the fixed rod. Under the action of the two hydraulic levers and the telescopic rod, the structure is more stable. At the same time, when the hydraulic rod is raised, the telescopic rod is also raised accordingly. Under the action of the fixed rod, the first hydraulic cylinder, the second hydraulic cylinder and the telescopic rod move synchronously, thereby preventing the hydraulic cylinder from tilting during the raising process.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 This is a structural diagram of a hydraulic lifting device for a suspension system of the utility model;

[0015] Figure 2 This is an internal structural diagram of a hydraulic lifting device of a suspension system of the utility model;

[0016] Figure 3 This is a structural diagram of a hydraulic cylinder of a hydraulic lifting device of a suspension system of the utility model;

[0017] Figure 4 This is an installation structure diagram of a hydraulic lifting device of a suspension system of the utility model.

[0018] Legend:

[0019] 1. Support arm; 2. Adjusting arm; 21. Connecting hole; 3. Buffer; 4. Fixing rod; 41. Connecting ring; 5. Hydraulic cylinder; 51. First hydraulic cylinder; 52. Second hydraulic cylinder; 6. Telescopic rod; 7. Spring; 8. Hydraulic oil pipe; 9. Frame; 10. Wheel; 11. Connecting shaft. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] Reference Figure 1-4 The utility model embodiment is a suspension system hydraulic lifting device, which includes a support arm 1 and a frame 9, the support arm 1 is provided with a connecting shaft 11, an adjusting arm 2 is hinged in the support arm 1 through the connecting shaft 11, and an end of the adjusting arm 2 away from the connecting shaft 11 is provided with a connecting hole 21, and a wheel 10 is fixedly connected to the outer side of the connecting hole 21;

[0022] The rear side of the support arm 1 is fixedly connected to the frame 9, and a fixed rod 4 is rotatably connected to the support arm 1 above the adjusting arm 2. The connecting shaft 11 and the fixed rod 4 are arranged parallel to each other. A connecting ring 41 is rotatably connected to the fixed rod 4, and a hydraulic cylinder 5 and a telescopic rod 6 are fixedly connected to the outer side of the connecting ring 41. There are two hydraulic cylinders 5, namely a first hydraulic cylinder 51 and a second hydraulic cylinder 52. The first hydraulic cylinder 51 and the second hydraulic cylinder 52 are respectively fixedly connected with a hydraulic oil pipe 8. The telescopic rod 6 is located in the middle of the first hydraulic cylinder 51 and the second hydraulic cylinder 52, and is sleeved with a spring 7. The lower ends of the first hydraulic cylinder 51, the second hydraulic cylinder 52 and the telescopic rod 6 are all hinged to the upper side of the adjusting arm 2; a buffer 3 is fixedly connected to the adjusting arm 2 located on the left side of the hydraulic cylinder 5 and the telescopic rod 6, and the upper end of the buffer 3 is fixedly connected to the support arm 1.

[0023] Working principle: When in use, pull the external lifting handle, the external hydraulic pump compresses the hydraulic oil into high pressure, and injects the oil into the first hydraulic cylinder 51 and the second hydraulic cylinder 52 through the hydraulic oil pipe 8. As the engine keeps working, the amount of hydraulic oil injected into the hydraulic cylinder increases, and the pressure gradually increases, pushing the hydraulic rods in the first hydraulic cylinder 51 and the second hydraulic cylinder 52 upward smoothly. When the hydraulic rods rise, the telescopic rod 6 also rises. Under the action of the fixed rod 4, the first hydraulic cylinder 51, the second hydraulic cylinder 52 and the telescopic rod 6 move synchronously to prevent the hydraulic cylinders from tilting during the lifting process.

[0024] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A suspension system hydraulic lifting device, characterized in that: include: A support arm (1) and a vehicle frame (9), wherein the support arm (1) is provided with a connecting shaft (11), an adjusting arm (2) is hingedly connected in the support arm (1) through the connecting shaft (11), a connecting hole (21) is provided at one end of the adjusting arm (2) away from the connecting shaft (11), the rear side of the support arm (1) is fixedly connected to the vehicle frame (9), a fixing rod (4) is rotatably connected in the support arm (1) above the adjusting arm (2), a connecting ring (41) is rotatably connected to the fixing rod (4), a hydraulic cylinder (5) and a telescopic rod (6) are fixedly connected to the outer side of the connecting ring (41), the hydraulic cylinder (5) has two, namely a first hydraulic cylinder (51) and a second hydraulic cylinder (52), the telescopic rod (6) is located in the middle of the first hydraulic cylinder (51) and the second hydraulic cylinder (52), and is sleeved with a spring (7), the lower ends of the first hydraulic cylinder (51), the second hydraulic cylinder (52) and the telescopic rod (6) are all hingedly connected to the upper side of the adjusting arm (2).

2. A suspension system hydraulic lifting device according to claim 1, characterized in that: A buffer component (3) is fixedly connected to the adjustment arm (2) located on the left side of the hydraulic cylinder (5) and the telescopic rod (6), and the upper end of the buffer component (3) is fixedly connected to the support arm (1).

3. A suspension system hydraulic lifting device according to claim 2, characterized in that: The outer side of the connection hole (21) is fixedly connected to a wheel (10).

4. A suspension system hydraulic lifting device according to claim 3, characterized in that: The first hydraulic cylinder (51) and the second hydraulic cylinder (52) are respectively fixedly connected with hydraulic oil pipes (8).

5. A suspension system hydraulic lifting device according to claim 4, characterized in that: The connecting shaft (11) and the fixing rod (4) are arranged parallel to each other.

Images