Hydraulic follow-up device for cab of pitching machine

Abstract

The utility model discloses a hydraulic follow-up device for a cab of a pitching machine, the cab is supported on a cantilever support of the pitching machine and is hinged with an upper main body structure, and a driving device for driving the upper main body structure to swing is connected between the upper main body structure and a lower main body structure of the pitching machine; comprising a driven oil cylinder and a driving oil cylinder, the cab is connected with the cantilever support in a supporting mode through the driven oil cylinder, and the driven oil cylinder is hinged to the cab; the driving oil cylinder is hinged between the lower main body structure and the upper main body structure; the driven oil cylinder and the driving oil cylinder are in differential connection, and the driven oil cylinder and the driving oil cylinder are connected through an oil way. According to the utility model, the two differential cylinders are connected, so that the cab can make instant response to the pitching action of equipment, the operation comfort of a driver is improved, and the basic stability is maintained. In the whole action process, a power source is not needed, the structure is simple, the cost is low, the reliability is high, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of large-scale equipment such as engineering machinery and port machinery, and in particular to a hydraulic follower device for a driver's cab of a pitching machinery. Background Art

[0002] In order to meet the comfort and intuitiveness of operation, a dedicated driver's cab is required for existing large-scale equipment such as engineering machinery and port machinery, such as stackers. However, the equipment needs to achieve all-round working conditions, and the driver's cab pitches up and down with the upper structure. At this time, in order to ensure the smooth operation of the driver, the driver's cab needs to remain horizontal at all times. Most existing equipment uses dampers to achieve this. Although this structure is simple and low-cost, it has a significant disadvantage, that is, the center of gravity position is difficult to accurately grasp, especially in dynamic situations caused by changes or movements of operators, the stability of the driver's cab is also immediately broken accordingly.

[0003] When the cab is in a tilted state, ordinary hydraulic rods can be used to support it to keep it in a horizontal state; but if the hydraulic device is started after the cab is tilted, it will not be able to respond immediately, affecting the driver's operating experience. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a hydraulic follower device for a driver's cab of a pitching machine, which enables the driver's cab to make an instant response to the pitching action of the equipment and keeps the driver's cab in a stable state.

[0005] To achieve the above object, the technical solution of the utility model is: a hydraulic follower device for a driver's cab of a pitching machine, the driver's cab is supported on a cantilever frame of the pitching machine and is hinged to an upper main structure, and a driving device for driving the upper main structure to swing is connected between the upper main structure and the lower main structure of the pitching machine;

[0006] It includes a slave cylinder and an active cylinder. The driver's cab is connected to the cantilever frame support through the slave cylinder, and the slave cylinder and the driver's cab are hinged; the active cylinder is hingedly connected between the lower main structure and the upper main structure; the slave cylinder and the active cylinder are differentially connected, and the slave cylinder and the active cylinder are connected through an oil circuit.

[0007] Preferably, the driving device is a main hydraulic cylinder for pitch drive, and the main hydraulic cylinder is hinged to the upper main structure or the cantilever frame.

[0008] Preferably, the pitching machine is a stacker.

[0009] Preferably, in order to keep the driver's cab stable, the specifications and sizes of the slave cylinder and the master cylinder are exactly the same.

[0010] Preferably, the oil circuits of the slave cylinder and the master cylinder are connected to the oil tank via a one-way valve and an oil replenishment pump.

[0011] Preferably, the oil circuit is also connected to the oil tank via a bypass and a pressure relief valve.

[0012] The beneficial effects of the utility model are as follows: by connecting two differential oil cylinders, the driver's cab can make an immediate response to the pitching action of the equipment, improve the driver's operating comfort, and maintain basic stability. No power source is required during the entire action process, the structure is simple, the cost is not high, the reliability is strong, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a diagram of the whole machine in non-working state.

[0014] Figure 2 This is a downward-looking diagram of the superstructure.

[0015] Figure 3 This is a partial enlarged view of the upper structure in the upward state. (The circled parts are all hinged, that is, rotating connections.)

[0016] Figure 4 This is the hydraulic principle diagram of the follower device. DETAILED DESCRIPTION

[0017] Embodiment 1: Figure 1 , 2 As shown in Figures 3 and 4, a hydraulic follower device for a driver's cab of a pitching machine, wherein the pitching machine is a stacker; the driver's cab 1 is supported on the cantilever frame 2 of the pitching machine and is hinged to the upper main structure 3 through a connecting rod 6, and a driving device 4 for driving the upper main structure 3 to pitch and swing is hingedly connected between the upper main structure 3 and the lower main structure 5 of the pitching machine; the driving device 4 is a main hydraulic cylinder for pitching drive, and the main hydraulic cylinder is hinged to the upper main structure 3.

[0018] It includes a slave cylinder 7 and a master cylinder 8. The driver's cab 1 is supported and connected to the cantilever frame 2 through the slave cylinder 7, and the slave cylinder 7 is hinged to the driver's cab 1 and the cantilever frame 2; the master cylinder 8 is hinged to the lower main structure 5 and the upper main structure 3 respectively; the slave cylinder 7 and the master cylinder 8 are differentially connected, and the slave cylinder 7 and the master cylinder 8 are connected through an oil circuit. The slave cylinder 7 and the master cylinder 8 are of exactly the same size. The slave cylinder 7 and the master cylinder 8 are connected to the oil tank 11 through a one-way valve 9 and an oil replenishment pump 10 on the oil circuit. The oil tank 11 is also connected to the pressure relief valve 12 through a bypass on the oil circuit. The above articulation methods can all be positioned and installed by rotating the pin shaft and the connecting seat.

[0019] The utility model Figure 4As shown, when the equipment starts to be installed, the hydraulic oil in the cylinder body and pipeline of the slave cylinder 7 and the master cylinder 8 must be filled from the oil tank 11 through a manual or electric oil replenishment pump 8. The one-way valve 9 is to maintain the pressure of the hydraulic system of the follower device basically unchanged. If an abnormality occurs and causes the system pressure to exceed the working range, the pressure can be relieved through the safety valve 10 to protect the safety and reliability of the entire system. At the same time, during the long-term working process, it is inevitable that the oil in the system will leak out to a certain extent. If it is not replenished in time, the system will become unstable, so the replenishment pump 8 can be used to replenish it in time.

[0020] At the beginning, the whole equipment is in non-working state, such as Figure 1 As shown, the upper main structure 3 is kept horizontal, and the cab 1 is also adjusted to a horizontal state through installation and adjustment. When the equipment starts working, the upper main structure 3 needs to achieve up and down pitching movement. The specifications and sizes of the slave cylinder 7 and the active cylinder 8 are exactly the same. The slave cylinder 7 is hingedly installed between the bottom of the cab 2 and the cantilever frame 2, and the active cylinder 8 is hingedly installed between the lower main structure 5 and the upper main structure 3. Both are differentially connected, see Figure 1 and 4 .

[0021] like Figure 2 As shown in the figure, when it is necessary to work in a downward working condition, the main hydraulic cylinder is first operated to retract inwards through the hydraulic system of the whole machine, and the upper main structure 3 is then tilted down to a specified angle. In general, the driver's cab 1 installed thereon will also tilt downwards by the same angle. During the downward tilting process of the upper main structure 3, the active cylinder 8 will be forced to retract inwards along with the main hydraulic cylinder. Figure 4 As shown, when the piston rod of the active oil cylinder 8 contracts inward, a certain amount of pressure oil will be built up and delivered to the slave oil cylinder 7, causing the piston rod of the slave oil cylinder 7 to extend outward, thereby lifting the driver's cab 1 upward.

[0022] On the contrary, when it is necessary to work in an upward working condition, such as Figure 3 As shown, during the upward tilt of the upper main structure 3, the active cylinder 8 will be forced to extend outward along with the main hydraulic cylinder. Figure 4 As shown, when the piston rod of the active cylinder 8 extends outward, a certain negative pressure is formed to suck the hydraulic oil out of the active cylinder 7, causing the piston rod of the slave cylinder 7 to contract inward, thereby pulling the driver's cab 1 downward to keep it basically stable.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydraulic follower device for a driver's cab of a pitching machine, wherein the driver's cab (1) is supported on a cantilever frame (2) of the pitching machine and is hinged to an upper main structure (3), and a driving device (4) for driving the upper main structure (3) to swing is connected between the upper main structure (3) and a lower main structure (5) of the pitching machine; It is characterized in that The invention comprises a slave cylinder (7) and a master cylinder (8); the driver's cab (1) is supported and connected to a cantilever frame (2) through the slave cylinder (7), and the slave cylinder (7) and the driver's cab (1) are hinged; the master cylinder (8) is hingedly connected between a lower main structure (5) and an upper main structure (3); the slave cylinder (7) and the master cylinder (8) are differentially connected, and the slave cylinder (7) and the master cylinder (8) are connected through an oil circuit.

2. A hydraulic follower device for a driver's cab of a pitching machine according to claim 1, characterized in that: The driving device (4) is a main hydraulic cylinder used for pitching drive, and the main hydraulic cylinder is hinged to the upper main structure (3) or the cantilever frame (2).

3. A hydraulic follower device for a driver's cab of a pitching machine according to claim 1, characterized in that: The pitching machine is a stacker.

4. A hydraulic follower device for a driver's cab of a pitching machine according to claim 1, characterized in that: The specifications and sizes of the driven oil cylinder (7) and the active oil cylinder (8) are completely consistent.

5. The hydraulic follower device for the driver's cab of a pitching machine according to claim 1, characterized in that: The oil circuits of the slave oil cylinder (7) and the master oil cylinder (8) are connected to an oil tank (11) via a one-way valve (9) and an oil replenishment pump (10).

6. A hydraulic follower device for a driver's cab of a pitching machine according to claim 5, characterized in that: The oil circuit is also connected to the oil tank (11) via a bypass and a pressure relief valve (12).

Images