Hydraulic drive type low-speed track panel transport vehicle

Abstract

The utility model discloses a hydraulic drive type low-speed track panel transport vehicle, and belongs to the technical field of track construction. Comprising a flat car and two wheel pairs. A cab is arranged at the front end of the flat car, and a diesel tank, a hydraulic oil tank, a battery, a diesel engine, a servo variable plunger pump, an auxiliary pump and two supporting structures are arranged at the bottom of the flat car. The two wheel pairs are arranged on the two supporting structures respectively, the two supporting structures are each provided with a hydraulic plunger motor, and the hydraulic plunger motors are in transmission connection with rotating shafts of the wheel pairs. The servo variable plunger pump is connected with the hydraulic plunger motor through a main loop and is connected with the hydraulic oil tank through a pipeline; the diesel engine coaxially drives the servo variable displacement piston pump and the auxiliary pump, is connected with the diesel tank through a pipeline and is electrically connected with the battery; an inlet of the auxiliary pump is connected with the hydraulic oil tank through a low-pressure oil supplementing pipeline, one outlet of the auxiliary pump is connected with the main loop through a pipeline with a one-way valve, and the other outlet of the auxiliary pump is connected with a displacement control valve of the servo variable displacement piston pump through a pipeline.

Description

Technical Field

[0001] The utility model belongs to the technical field of track construction, and particularly relates to a hydraulically driven low-speed rail transport vehicle suitable for tracks with a large turning radius. Background Art

[0002] The rails and sleepers are connected with connecting parts to form rails, and then the rails are transported from the assembly base to the site for laying by flatbed trucks. The laying of rails can make use of the existing rail assembly base, basic materials and reliable technology, without the need to purchase a large number of new equipment, and the rail assembly accuracy is high. However, the rail laying method requires the use of flatbed trucks to transport the rails.

[0003] For example, the patent with application number CN201620931051.0 discloses a non-standard rail-mounted trolley for single-line operation of a railway bridge-building machine, including a frame, a longitudinal single-edge running wheel sliding on the longitudinal track and distributed on the left and right is arranged under the frame, a transverse double-edge running wheel is arranged on the inner side of the longitudinal single-edge running wheel, the bottom end of the transverse double-edge running wheel is higher than the longitudinal single-edge running wheel, a hydraulic cylinder fixed under the frame is arranged on the outer side of the longitudinal single-edge running wheel, and a manual hydraulic pump connected to the hydraulic cylinder is fixed on the upper side of the frame.

[0004] For example, the patent with application number CN202122946000.9 discloses a medium- and low-speed magnetic levitation rail transport vehicle with an anti-dumping function, including a traveling assembly, the traveling assembly includes a connecting seat, a column is welded on the top of the connecting seat, a guide assembly is laterally welded on the surface of the column, and a load-bearing assembly is welded on the top of the column.

[0005] In the prior art, rail tracks are transported by using a traction locomotive to pull a flatbed truck, which requires a traction locomotive and a flatbed truck, resulting in high costs. Utility Model Content

[0006] In order to solve the above problems, the embodiment of the utility model provides a hydraulically driven low-speed rail transport vehicle, which does not require a tractor, is hydraulically driven, has a compact structure and is low in cost. The technical solution is as follows:

[0007] The utility model provides a hydraulically driven low-speed rail transport vehicle, including a flatbed vehicle 1 arranged in a front-to-back direction and two wheel pairs 2 arranged side by side at the bottom thereof; a cab 3 is provided on the left or right side of the front end of the flatbed vehicle 1, and a diesel tank, a hydraulic oil tank 9, a battery, a diesel engine 5, a servo variable piston pump 6, an auxiliary pump 21 and two supporting structures are provided at the bottom thereof, and the height of the bottom thereof from the ground is greater than or equal to 0.8m; the two wheel pairs 2 are respectively arranged on two supporting structures, and the supporting structures include two bearing seats 4 arranged side by side on the left and right sides, and the two ends of the rotating shaft of the wheel pair 2 extend toward and rotate on the two bearing seats 4 relative to the track wheels on the corresponding sides, and the two supporting structures are respectively provided with a hydraulic piston motor 7 , the hydraulic piston motor 7 is drivingly connected to the rotating shaft of the wheelset 2; the cab 3 is located at the lower side of the flatbed truck 1, and is provided with a control console 8 that can control the servo variable piston pump 6; the servo variable piston pump 6 is connected to the hydraulic piston motor 7 through the main circuit 19, and is connected to the hydraulic oil tank 9 through a pipeline; the diesel engine 5 coaxially drives the servo variable piston pump 6 and the auxiliary pump 21, and its oil inlet is connected to the diesel tank through a pipeline, and is electrically connected to the battery; the inlet of the auxiliary pump 21 is connected to the hydraulic oil tank 9 through a low-pressure oil replenishment pipeline 10, one of its outlets is connected to the low-pressure area of ​​the main circuit 19 through a pipeline with two one-way valves 11, and the other outlet is connected to the displacement control valve 12 of the servo variable piston pump 6 through a pipeline.

[0008] Specifically, the main circuit 19 in the embodiment of the utility model includes a supply duct and a discharge duct, and the supply duct and the discharge duct are both arranged between the servo variable piston pump 6 and the hydraulic piston motor 7 to form a circulation structure; one outlet of the auxiliary pump 21 is divided into two outputs, one is connected to the supply duct through a one-way valve 11, and the other is connected to the discharge duct through another one-way valve 11.

[0009] Furthermore, a cooler 14 is also provided at the bottom of the flatbed truck 1 in the embodiment of the utility model, and an integrated valve block 13 is provided on the main circuit 19. The integrated valve block 13 includes a shuttle valve 31, a low-pressure relief valve 32 and two high-pressure relief valves 33. The two inlets of the shuttle valve 31 are respectively connected to the supply conduit and the discharge conduit, and the two ends of the high-pressure relief valve 33 are respectively connected to the supply conduit and the discharge conduit, and the outlet of the shuttle valve 31, the low-pressure relief valve 32, the housing of the hydraulic plunger motor 7, the housing of the servo variable plunger pump 6, the cooler 14 and the hydraulic oil tank 9 are connected in sequence through the cooling return oil pipeline 15.

[0010] Furthermore, in the embodiment of the utility model, a first pressure gauge 16 is provided on the main circuit 19 and at the inlet and outlet of the hydraulic piston motor 7 , and an oil filter 18 and a second pressure gauge 17 are provided on the low-pressure oil replenishment pipeline 10 .

[0011] Specifically, the hydraulic piston motor 7 in the embodiment of the utility model is fixed to the outer side of the left or right bearing seat 4 and its driving shaft is coaxially fixed with the rotating shaft of the wheelset 2 .

[0012] Preferably, the hydraulic piston motor 7 and the cab 3 in the embodiment of the utility model are located on the same side.

[0013] More specifically, the model of the diesel engine 5 in the embodiment of the utility model is YC6A260-T301, the model of the servo variable piston pump 6 is Hz-pvxs250, and the model of the hydraulic piston motor 7 is sts11-1100.

[0014] Specifically, the cab 3 in the embodiment of the utility model is a rectangular room arranged in the front-to-back direction, with an open top, a left side or a right side flush with the corresponding side of the flatbed truck 1 and a door provided thereon; the control console 8 is provided at the front of the cab 3, and a chair 20 is provided at the rear of the cab 3.

[0015] More specifically, the flatbed truck 1 in the embodiment of the utility model has a length of 12m, a width of 2.5m, a top distance from the ground of 1.35m, and a bottom distance from the ground of 1.1m; the length of the cab 3 is 1.4m, a width of 0.8m, and an inner height of 1.05m.

[0016] Among them, the diesel engine 5, the servo variable piston pump 6 and the auxiliary pump 21 in the embodiment of the utility model are an integrated structure and are arranged in the middle front part of the flatbed vehicle 1, and the servo variable piston pump 6 is arranged on the rear side of the diesel engine 5.

[0017] The beneficial effects of the technical solution provided by the embodiment of the utility model are as follows: the embodiment of the utility model provides a hydraulically driven low-speed rail transport vehicle, which does not require a tractor, is hydraulically driven, has a compact structure, and is low in cost. In addition, the patent is hydraulically driven, does not require a brake structure, and can perform stepless speed change. Specifically, the transport vehicle of the patent has forward, backward, acceleration, deceleration and braking functions, and the speed is less than 10 kilometers per hour. The speed is controlled by the engine throttle, and the response speed is fast. Because the hydraulic motor has its own braking function, automatic parking can be achieved, and the safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a hydraulically driven low-speed rail transport vehicle provided by an embodiment of the utility model;

[0019] Figure 2 It is a top view of a hydraulically driven low-speed rail transport vehicle;

[0020] Figure 3 It is a front view of a hydraulically driven low-speed rail transport vehicle;

[0021] Figure 4 It is the schematic diagram of the combination of a servo variable piston pump and a hydraulic piston motor.

[0022] In the figure: 1 flatbed car, 2 wheel set, 3 cab, 4 bearing seat, 5 diesel engine, 6 servo variable piston pump, 7 hydraulic piston motor, 8 control console, 9 hydraulic oil tank, 10 low-pressure oil supply pipeline, 11 check valve, 12 displacement control valve, 13 integrated valve block, 14 cooler, 15 cooling oil return pipeline, 16 first pressure gauge, 17 second pressure gauge, 18 oil filter, 19 main circuit, 20 chair, 21 auxiliary pump;

[0023] 31 shuttle valve, 32 low pressure relief valve, 33 high pressure relief valve. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0025] Example 1

[0026] See also Figure 1-4 Embodiment 1 provides a hydraulically driven low-speed rail transport vehicle, including a flatbed vehicle 1 arranged in the front-to-back direction and two wheel pairs 2 arranged side by side in the front-to-back direction at the bottom thereof. The wheel pairs 2 are arranged in the left-right direction. The two wheel pairs 2 are respectively arranged at the front and rear of the flatbed vehicle 1. The flatbed vehicle 1 can be provided with a sand spreading device (see the description of application number CN202220928455.X) and a parking device (see the description of application number CN 202220928454.5) as needed.

[0027] Among them, a cab 3 is provided on the left or right side of the front end of the flatbed vehicle 1, and a diesel tank (providing diesel for the diesel engine 5), a hydraulic oil tank 9 (providing hydraulic oil), a battery (providing power for the diesel engine 5, the control console 8 and other structures), a diesel engine 5, a servo variable piston pump 6 (specifically a manual servo variable piston pump), an auxiliary pump 21 (specifically a gear pump), a cooler 14 and two supporting structures (used to set the wheelset 2 and lift the flatbed vehicle 1), etc., and the height of the bottom from the ground is greater than or equal to 0.8m (which can ensure the installation of the cab 3, the diesel tank, the hydraulic oil tank 9, the battery, the diesel engine 5, the servo variable piston pump 6, the cooler 14 and the auxiliary pump 21, etc., and also facilitate the installation of the rail row). The two wheelsets 2 are respectively arranged on two supporting structures, and the supporting structure includes two bearing seats 4 arranged side by side on the left and right. The left and right ends of the rotating shaft of the wheelset 2 extend toward the corresponding rail wheel and are respectively rotatably arranged on the two bearing seats 4, and the two rail wheels are respectively located on the inner side of the bearing seats 4 on the corresponding side. A hydraulic piston motor 7 (specifically a quantitative hydraulic piston motor, more specifically, a five-star hydraulic piston motor, which includes a hydraulic piston motor 7, a displacement control valve 12, and a relief valve, etc.) is respectively provided on the two supporting structures, and the hydraulic piston motor 7 is drivingly connected to the rotating shaft of the wheelset 2. Specifically, the hydraulic piston motor 7 is fixed to the outside of the left or right bearing seat 4 and its drive shaft is coaxially fixed with the rotating shaft of the wheelset 2. Preferably, the hydraulic piston motor 7 and the cab 3 are located on the same side.

[0028] The cab 3 is located at the lower side of the flatbed truck 1, and is provided with a control console 8 capable of controlling the servo variable piston pump 6 (on which are provided a hydraulic control handle capable of controlling the displacement control valve 12, a button for controlling the diesel engine 5, a power button, various instruments, etc.), which is a rectangular room arranged in the front-to-back direction (the space must meet the needs of the driver's operation), with an open top, and its left or right side is flush with the corresponding side of the flatbed truck 1 and is provided with a door, and its front side can be glass. The control console 8 is provided at the front of the cab 3, and a chair 20 is provided at the rear of the cab 3.

[0029] See also Figure 4The servo variable piston pump 6 is connected to the hydraulic piston motor 7 through the main circuit 19, which is connected to the hydraulic oil tank 9 through a pipeline. The diesel engine 5 coaxially drives the servo variable piston pump 6 and the auxiliary pump 21, whose oil inlet is connected to the diesel tank through a pipeline, which is electrically connected to the battery. The inlet of the auxiliary pump 21 is connected to the hydraulic oil tank 9 through a low-pressure oil replenishment pipeline 10, one of its outlets is connected to the low-pressure area of ​​the main circuit 19 through a pipeline with two one-way valves 11 for replenishing oil to the low-pressure area of ​​the main circuit 19, and the other outlet is connected to the displacement control valve 12 of the servo variable piston pump 6 through a pipeline (the connection mode of the displacement control valve 12 and the servo variable piston pump 6 is an existing structure, which is a manual variable control valve, controlling the direction and speed of the hydraulic piston motor 7, controlling the swash plate azimuth and tilting angle of the servo variable piston pump 6, determining the oil discharge direction and oil discharge flow of the servo variable piston pump 6, and thus controlling the direction and speed of the hydraulic piston motor 7) to form the servo variable mechanism oil circuit of the servo variable piston pump 6. An integrated valve block 13 is provided on the main circuit 19 to ensure normal operation and it includes a supply conduit and a discharge conduit, and the supply conduit and the discharge conduit are both provided between the servo variable piston pump 6 and the hydraulic piston motor 7 to form a circulation structure. An outlet of the auxiliary pump 21 is divided into two outputs, one of which is connected to the supply conduit through a one-way valve 11, and the other is connected to the discharge conduit through another one-way valve 11. The integrated valve block 13 includes a shuttle valve 31, a low-pressure relief valve 32 and two high-pressure relief valves 33. Among them, the high-pressure relief valve 33 can prevent the main circuit 19 from being damaged by the servo variable piston pump 6 or the hydraulic piston motor 7 when it is overloaded in any direction, and can also play a braking role. When the system is working, the shuttle valve 31 provides an overflow channel for the low-pressure area of ​​the main circuit 19, and the low-pressure relief valve 32 maintains the pressure in the low-pressure area, and also allows the overflow oil to flow into the cooling oil return pipeline 15. The two inlets of the shuttle valve 31 are connected to the supply conduit and the discharge conduit respectively, the two ends of the high-pressure relief valve 33 are connected to the supply conduit and the discharge conduit respectively, the outlet of the shuttle valve 31, the low-pressure relief valve 32, the housing of the hydraulic piston motor 7, the housing of the servo variable piston pump 6, the cooler 14 and the hydraulic oil tank 9 are connected in sequence through the cooling oil return pipeline 15 (used to take away the heat generated by the servo variable piston pump 6 and the hydraulic piston motor 7 during operation to ensure their normal operation). When the servo variable piston pump 6 is running idle, the shuttle valve 31 is kept in the middle closed position by the return spring, assisting the output oil of the servo variable piston pump 6, and the output oil of the servo variable piston pump 6 will be directly supplied from the relief valve of the servo variable piston pump 6 to the housing of the servo variable piston pump 6 for cooling, and the cooling oil will no longer enter the housing of the hydraulic piston motor 7. A first pressure gauge 16 is provided on the main circuit 19 and at the inlet and outlet of the hydraulic piston motor 7, and an oil filter 18 and a second pressure gauge 17 are provided on the low-pressure oil supply pipeline 10.

[0030] Among them, see Figure 1The diesel engine 5 , the servo variable piston pump 6 and the auxiliary pump 21 in the embodiment of the utility model are an integrated structure and are arranged in the middle front part of the flatbed vehicle 1 , and the servo variable piston pump 6 is arranged on the rear side of the diesel engine 5 .

[0031] Example 2

[0032] See also Figure 3 Embodiment 2 provides a hydraulically driven low-speed rail transport vehicle, the structure of which is the same as that of Embodiment 1, except that the cab 3 in this embodiment is arranged on the right side of the front end of the flatbed vehicle 1, and the hydraulic plunger motor 7 is arranged on the outer side (right side) of the bearing seat 4 on the right side.

[0033] Example 3

[0034] Embodiment 3 provides a hydraulically driven low-speed rail transport vehicle. The model of the diesel engine 5 in this embodiment is YC6A260-T301, the model of the servo variable piston pump 6 is Hz-pvxs250, and the model of the hydraulic piston motor 7 is sts11-1100. The length of the flatbed vehicle 1 is 12m, its width is 2.5m, its top is 1.35m from the ground, and its bottom is 1.1m from the ground. The length of the cab 3 is 1.4m, its width is 0.8m, and its inner height is 1.05m. The diameter of the rail wheel is 0.68m, and the distance between the two rail wheels is 1.435m. The distance between the two wheel pairs 2 is 6m. Specifically, the parameters of the diesel engine 5 are shown in Table 1:

[0035] Table 1

[0036]

[0037] Among them, "first" and "second" in this patent only serve to distinguish and have no other special meanings.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulically driven low-speed rail transport vehicle, comprising a flatbed vehicle (1) arranged in a front-to-rear direction and two wheel pairs (2) arranged side by side in a front-to-rear direction at its bottom; characterized in that: A cab (3) is provided on the left or right side of the front end of the flatbed vehicle (1), and a diesel tank, a hydraulic oil tank (9), a battery, a diesel engine (5), a servo variable piston pump (6), an auxiliary pump (21) and two supporting structures are provided at the bottom thereof, and the height of the bottom thereof from the ground is greater than or equal to 0.8 m; two wheel sets (2) are respectively provided on the two supporting structures, and the supporting structures include two bearing seats (4) arranged side by side on the left and right, and the two ends of the rotating shaft of the wheel set (2) extend toward the rail wheels on the corresponding side and are respectively rotatably provided on the two bearing seats (4), and a hydraulic piston motor (7) is respectively provided on the two supporting structures, and the hydraulic piston motor (7) is drivingly connected to the rotating shaft of the wheel set (2); the cab (3) is located on the flatbed vehicle. A control console (8) capable of controlling a servo variable piston pump (6) is provided on the lower side of the cart (1); the servo variable piston pump (6) is connected to a hydraulic piston motor (7) through a main circuit (19), and is connected to a hydraulic oil tank (9) through a pipeline; the diesel engine (5) coaxially drives the servo variable piston pump (6) and an auxiliary pump (21), and its oil inlet is connected to the diesel tank through a pipeline, and is electrically connected to a battery; the inlet of the auxiliary pump (21) is connected to the hydraulic oil tank (9) through a low-pressure oil replenishment pipeline (10), one of its outlets is connected to a low-pressure area of ​​the main circuit (19) through a pipeline with two one-way valves (11), and the other outlet is connected to a displacement control valve (12) of the servo variable piston pump (6) through a pipeline.

2. The hydraulically driven low-speed rail transport vehicle according to claim 1, characterized in that: The main circuit (19) comprises a supply conduit and a discharge conduit, both of which are arranged between a servo variable piston pump (6) and a hydraulic piston motor (7) to form a circulation structure; an outlet of the auxiliary pump (21) is divided into two output paths, one of which is connected to the supply conduit through a one-way valve (11), and the other is connected to the discharge conduit through another one-way valve (11).

3. The hydraulically driven low-speed rail transport vehicle according to claim 2, characterized in that: A cooler (14) is also provided at the bottom of the flatbed vehicle (1). An integrated valve block (13) is provided on the main circuit (19). The integrated valve block (13) comprises a shuttle valve (31), a low-pressure relief valve (32) and two high-pressure relief valves (33). The two inlets of the shuttle valve (31) are respectively connected to a supply conduit and a discharge conduit. The two ends of the high-pressure relief valve (33) are respectively connected to a supply conduit and a discharge conduit. The outlet of the shuttle valve (31), the low-pressure relief valve (32), the housing of the hydraulic piston motor (7), the housing of the servo variable piston pump (6), the cooler (14) and the hydraulic oil tank (9) are connected in sequence via a cooling oil return pipeline (15).

4. The hydraulically driven low-speed rail transport vehicle according to claim 3, characterized in that: A first pressure gauge (16) is provided on the main circuit (19) and at the inlet and outlet of the hydraulic piston motor (7), and an oil filter (18) and a second pressure gauge (17) are provided on the low-pressure oil supply pipeline (10).

5. The hydraulically driven low-speed rail transport vehicle according to claim 1, characterized in that: The hydraulic piston motor (7) is fixed on the outside of the left or right bearing seat (4) and its drive shaft is coaxially fixed with the rotating shaft of the wheelset (2).

6. The hydraulically driven low-speed rail transport vehicle according to claim 5, characterized in that: The hydraulic piston motor (7) and the cab (3) are located on the same side.

7. The hydraulically driven low-speed rail transport vehicle according to claim 1, characterized in that: The model of the diesel engine (5) is YC6A260-T301, the model of the servo variable piston pump (6) is Hz-pvxs250, and the model of the hydraulic piston motor (7) is sts11-1100.

8. The hydraulically driven low-speed rail transport vehicle according to claim 1, characterized in that: The cab (3) is a rectangular room arranged in the front-to-back direction, with an open top, a left side or a right side thereof being flush with the corresponding side of the flatbed truck (1) and having a door thereon; the control console (8) is arranged at the front of the cab (3), and a chair (20) is arranged at the rear of the cab (3).

9. The hydraulically driven low-speed rail transport vehicle according to claim 8, characterized in that: The flatbed truck (1) is 12 m long, 2.5 m wide, the top is 1.35 m away from the ground, and the bottom is 1.1 m away from the ground; the cab (3) is 1.4 m long, 0.8 m wide, and 1.05 m high.

10. The hydraulically driven low-speed rail transport vehicle according to claim 1, characterized in that: The diesel engine (5), the servo variable piston pump (6) and the auxiliary pump (21) are an integrated structure and are arranged at the middle front part of the flatbed vehicle (1); the servo variable piston pump (6) is arranged at the rear side of the diesel engine (5).

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