阅读说明：本技术 具有多级伸缩支腿油缸的泵车 (Pump truck with multi-stage telescopic support oil cylinder ) 是由 阎军 李海波 王杰 于 2020-06-30 设计创作，主要内容包括：本发明公开了一种具有多级伸缩支腿油缸的泵车,包括活动支腿、多级伸缩支腿油缸,多级伸缩支腿油缸安装于活动支腿的伸缩端；多级伸缩支腿油缸包括缸体、缸底和多级油缸,缸底罩设于缸体的底部,多级油缸套设在缸体内,多级油缸中的前一级油缸的活塞杆为后一级油缸的缸筒,后一级油缸的活塞设于前一级油缸的缸筒内；缸体的底部设置有油口,多级油缸中的每一级油缸的缸筒的底部均开设有进油口和出油口。该具有多级伸缩支腿油缸的泵车的目的是解决传统泵车的支腿伸缩时由于下垂程度过大而导致车辆易倾翻的问题。(The invention discloses a pump truck with a multi-stage telescopic supporting leg oil cylinder, which comprises a movable supporting leg and a multi-stage telescopic supporting leg oil cylinder, wherein the multi-stage telescopic supporting leg oil cylinder is arranged at the telescopic end of the movable supporting leg; the multistage telescopic support leg oil cylinder comprises a cylinder body, a cylinder bottom and multistage oil cylinders, wherein the cylinder bottom is covered at the bottom of the cylinder body, the multistage oil cylinders are sleeved in the cylinder body, a piston rod of a front stage oil cylinder in the multistage oil cylinders is a cylinder barrel of a rear stage oil cylinder, and a piston of the rear stage oil cylinder is arranged in the cylinder barrel of the front stage oil cylinder; the bottom of cylinder body is provided with the hydraulic fluid port, and oil inlet and oil-out have all been seted up to the bottom of the cylinder of each grade hydro-cylinder among the multistage hydro-cylinder. The pump truck with the multi-stage telescopic supporting leg oil cylinder aims to solve the problem that a vehicle is prone to tipping due to overlarge sagging degree when supporting legs of a traditional pump truck are telescopic.)

1. The pump truck with the multi-stage telescopic support leg oil cylinder is characterized by comprising a movable support leg (1) and a multi-stage telescopic support leg oil cylinder (2), wherein the multi-stage telescopic support leg oil cylinder (2) is arranged at the telescopic end of the movable support leg (1);

the multi-stage telescopic supporting leg oil cylinder (2) comprises a cylinder body (201), a cylinder bottom (202) and multi-stage oil cylinders, wherein the cylinder bottom (202) is covered at the bottom of the cylinder body (201), the multi-stage oil cylinders are sleeved in the cylinder body (201), a piston rod (203) of a front stage oil cylinder in the multi-stage oil cylinders is a cylinder barrel of a rear stage oil cylinder, and a piston (204) of the rear stage oil cylinder is arranged in the cylinder barrel of the front stage oil cylinder;

the bottom of cylinder body (201) is provided with the hydraulic fluid port, oil inlet and oil-out have all been seted up to the bottom of the cylinder of each grade hydro-cylinder in the multistage hydro-cylinder.

2. The pump truck with the multi-stage telescopic leg oil cylinder according to claim 1, wherein the multi-stage telescopic leg oil cylinder (2) further comprises a buffer valve rod (205) and a retainer ring (206), the buffer valve rod (205) penetrates through the oil inlet and is fixedly connected with the piston (204), the buffer valve rod (205) is bullet-shaped, the cross-sectional area of one end, away from the cylinder bottom (202), of the buffer valve rod (205) is smaller than that of one end, facing the cylinder bottom (202), of the buffer valve rod, and the retainer ring (206) is sleeved on the buffer valve rod (205).

3. The pump truck with the multi-stage telescopic leg oil cylinder according to claim 2, characterized in that the multi-stage telescopic leg oil cylinder (2) further comprises a buffer ring (207), and the buffer ring (207) is arranged in the piston (204) and sleeved on the buffer valve rod (205).

4. The pump truck with the multi-stage telescopic leg oil cylinder as claimed in claim 2, wherein the retainer ring (206) is a steel wire retainer ring, and the steel wire retainer ring is sleeved on one end, facing the cylinder bottom (202), of the buffer valve rod (205).

5. The pump truck with the multi-stage telescopic leg oil cylinder according to claim 2, characterized in that the multi-stage telescopic leg oil cylinder (2) further comprises a pressure plate (208), and the pressure plate (208) is arranged on the end surface of the piston (204) facing the cylinder bottom (202) and sleeved on the buffer valve rod (205).

6. Pump truck with multi-stage telescopic leg cylinder according to claim 1, characterized in that the multi-stage telescopic leg cylinder (2) further comprises a cushion sleeve (209), the cushion sleeve (209) is mounted at the end of the piston (204) far from the cylinder bottom (202), and the piston rod (203) slides through the cushion sleeve (209).

7. The pump truck with the multi-stage telescopic leg cylinder according to claim 1, wherein the multi-stage telescopic leg cylinder (2) further comprises a guide sleeve (210), the outer diameter of the cylinder barrel of a first stage cylinder in the multi-stage cylinder is the largest, the guide sleeve (210) is mounted on the inner wall of the end, away from the cylinder bottom (202), of the cylinder barrel of the first stage cylinder, and the piston rod (203) slides through the guide sleeve (210).

8. Pump truck with multi-stage telescopic leg cylinder according to claim 1, characterized in that the multi-stage telescopic leg cylinder (2) further comprises a photoelectric sensor (211), the photoelectric sensor (211) is arranged in the cylinder bottom (202) for position feedback of the piston (204).

9. Pump truck with multi-stage telescopic leg cylinder according to claim 1, characterized in that the legs (1) and the oil passages (3) of their corresponding multi-stage telescopic leg cylinders (2) communicate.

10. The pump truck with the multi-stage telescopic leg oil cylinder according to claim 9, further comprising a hydraulic lock (4), wherein the hydraulic lock (4) is arranged on an oil path of the multi-stage telescopic leg oil cylinder (2).

Technical Field

The invention belongs to the technical field of engineering mechanical equipment, and particularly relates to a pump truck with a multi-stage telescopic supporting leg oil cylinder.

Background

The supporting legs of the pump truck generally comprise fixed supporting legs, movable supporting legs, supporting leg oil cylinders and the like; when the pump truck works, the movable supporting legs extend out firstly, and then the vertical oil cylinders on the movable supporting legs extend out of the supporting ground, so that the phenomena of vehicle rollover, chassis part damage and the like are avoided under various working conditions; the design of the existing pump truck supporting legs adopts common vertical oil cylinders, the common vertical oil cylinders are vertically arranged on the movable supporting legs and are positioned at two sides of the pump truck, after the common vertical oil cylinders are arranged, the ground clearance is small, the trafficability of the vehicle during running is influenced, and the structural design of part of the pump truck is limited; the supporting legs are generally formed by sleeving two or more telescopic mechanisms, the supporting legs need to be unfolded firstly and then extend out of the vertical oil cylinders during operation, the arm support of the pump truck is longer along with the increasing pumping height, the supporting leg span needs to be larger, the number of the unfolding stages of the supporting legs is more, and the vertical oil cylinders need to have enough stroke to support the whole truck off the ground due to elastic deformation of the supporting legs during unfolding, so that the stability requirement of the truck can be met.

In view of the above, those skilled in the art need to provide a pump truck with a multi-stage telescopic leg cylinder to solve the problem that when the leg of the conventional pump truck is telescopic, the deformation is too large, the stroke of the cylinder is limited, and the vehicle cannot be supported, so that the vehicle is prone to tipping.

Disclosure of Invention

Technical problem to be solved

The invention aims to solve the technical problem that when a supporting leg of a traditional pump truck is stretched and contracted, the vehicle is easy to roll over due to overlarge sagging degree.

(II) technical scheme

The invention provides a pump truck with a multi-stage telescopic supporting leg oil cylinder, which comprises a movable supporting leg and a multi-stage telescopic supporting leg oil cylinder, wherein the multi-stage telescopic supporting leg oil cylinder is arranged at the telescopic end of the movable supporting leg;

the multistage telescopic supporting leg oil cylinder comprises a cylinder body, a cylinder bottom and multistage oil cylinders, wherein the cylinder bottom is covered at the bottom of the cylinder body, the multistage oil cylinders are sleeved in the cylinder body, a piston rod of a front stage oil cylinder in the multistage oil cylinders is a cylinder barrel of a rear stage oil cylinder, and a piston of the rear stage oil cylinder is arranged in the cylinder barrel of the front stage oil cylinder;

the bottom of the cylinder body is provided with an oil port, and the bottom of the cylinder barrel of each stage of oil cylinder in the multi-stage oil cylinder is provided with an oil inlet and an oil outlet

Furthermore, the multi-stage telescopic support leg oil cylinder further comprises a buffer valve rod and a check ring, the buffer valve rod penetrates through the oil inlet and is fixedly connected with the piston, the buffer valve rod is bullet-shaped, the cross-sectional area of one end, far away from the cylinder bottom, of the buffer valve rod is smaller than that of one end, facing the cylinder bottom, of the buffer valve rod, and the check ring is sleeved on the buffer valve rod.

Furthermore, the multi-stage telescopic supporting leg oil cylinder further comprises a buffer ring, and the buffer ring is arranged in the piston and sleeved on the buffer valve rod.

Furthermore, the check ring is a steel wire check ring sleeved at one end of the buffer valve rod facing the cylinder bottom.

Furthermore, the multi-stage telescopic support oil cylinder further comprises a pressing plate, and the pressing plate is arranged on the end face, facing the cylinder bottom, of the piston and sleeved on the buffer valve rod.

Furthermore, the multi-stage telescopic support leg oil cylinder further comprises a buffer sleeve, the buffer sleeve is arranged at one end, far away from the cylinder bottom, of the piston, and the piston rod penetrates through the buffer sleeve in a sliding mode.

Furthermore, the multi-stage telescopic support leg oil cylinder further comprises a guide sleeve, the outer diameter of a cylinder barrel of a first-stage oil cylinder in the multi-stage oil cylinder is the largest, the guide sleeve is arranged on the inner wall of one end, far away from the cylinder bottom, of the cylinder barrel of the first-stage oil cylinder, and the piston rod penetrates through the guide sleeve in a sliding mode.

Furthermore, the multi-stage telescopic support oil cylinder further comprises a photoelectric sensor, and the photoelectric sensor is arranged in the cylinder bottom and used for position feedback of the piston.

Furthermore, the supporting legs are communicated with oil passages of the multi-stage telescopic supporting leg oil cylinders corresponding to the supporting legs.

Furthermore, the pump truck with the multistage telescopic support leg oil cylinder support leg further comprises a hydraulic lock, and the hydraulic lock is arranged on an oil path of the multistage telescopic support leg oil cylinder.

(III) advantageous effects

The technical scheme of the invention has the following advantages:

according to the pump truck with the multi-stage telescopic supporting leg oil cylinder, the supporting leg with the telescopic structure is arranged at the bottom of the pump truck, and the multi-stage telescopic supporting leg oil cylinder is arranged at the telescopic end of the supporting leg; the multistage telescopic support leg oil cylinder comprises a cylinder body, a cylinder bottom and multistage oil cylinders, wherein the cylinder bottom is covered at the bottom of the cylinder body, the multistage oil cylinders are sleeved in the cylinder body, a piston rod of a front stage oil cylinder in the multistage oil cylinders is a cylinder barrel of a rear stage oil cylinder, and a piston of the rear stage oil cylinder is arranged in the cylinder barrel of the front stage oil cylinder; the bottom of cylinder body is provided with the hydraulic fluid port, and oil inlet and oil-out have all been seted up to the bottom of the cylinder of each grade hydro-cylinder among the multistage hydro-cylinder. The pump truck provided with the multi-stage supporting leg oil cylinder can overcome the influence of the traditional supporting legs on the vehicle trafficability characteristic, is more beneficial to the optimization design of the vehicle structure, improves the universality of the vertical oil cylinder, reduces the size of the oil cylinder, overcomes the defect that the traditional pump truck cannot support the vehicle due to the fact that the traditional pump truck has too large deformation and limited stroke of the oil cylinder when stretching out and drawing back, improves the stability and the safety of the whole vehicle, and eliminates potential safety hazards.

Drawings

Fig. 1 is a schematic structural diagram of a pump truck with a multi-stage telescopic leg cylinder according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a multi-stage telescopic leg cylinder in a pump truck with the multi-stage telescopic leg cylinder according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a support leg in a pump truck with a multi-stage telescopic support leg cylinder according to an embodiment of the present invention.

In the figure:

1. a movable leg; 2. a multi-stage telescopic support oil cylinder; 201. a cylinder body; 202. a cylinder bottom; 203. a piston rod; 2031. a first piston rod; 2032. a second piston rod; 204. a piston; 205. a cushion valve stem; 206. a retainer ring; 207. a buffer ring; 208. pressing a plate; 209. a buffer sleeve; 210. a guide sleeve; 211. a photosensor; 3. an oil path; 4. hydraulic locking; 5. a hydraulic oil tank; 6. an oil pump; 7. a filter; 8. a hydraulic multi-way valve.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.