Wire-controlled lubrication system of full-hydraulic steering mechanism

Abstract

The invention relates to the technical field of drive-by-wire hydraulic steering systems, in particular to a drive-by-wire lubricating system of a full-hydraulic steering mechanism, which comprises a steering oil cylinder I and a steering oil cylinder II, lubricating systems are arranged at the oil outlet ends of an oil pressure control valve I and an oil pressure control valve II, and the oil outlet end of a lubricating pump is connected with a lubricating distributor. At the moment of steering switching (that is, pressure impact exists in the switching process of a large cavity and a small cavity), a steering system is impacted through a steering oil cylinder, or wheels bear road impact on a bumpy road, and when the pressure of the steering hydraulic system exceeds a set pressure value of an oil pressure control valve (a first oil pressure control valve or a second oil pressure control valve), the hydraulic system is driven to rotate. When steering is carried out, the oil pressure control valve is opened by the instant pressure oil, and the pressure oil drives the lubricating pump, so that the lubricating system is driven to lubricate each lubricating point, and the lubricating points are finally lubricated by using instant impact force generated during steering and impact from wheel edges as a system power source.

Description

Technical Field

[0001] The invention relates to the technical field of wire-controlled hydraulic steering systems, and in particular to a wire-controlled lubrication system implemented by a full hydraulic steering mechanism. Background Art

[0002] The fully hydraulic steering system consists of a steering wheel, a steering column, a steering motor, and a steering gear, which realizes mechanical steering and intelligent steering of heavy vehicles through a steering cylinder. Due to the structural limitations of the steering cylinder, the cylinder consists of a large cavity and a small cavity.

[0003] P=F / A; P is pressure; F is the force acting on the liquid surface, and A is the flow area. It can be seen from the above formula that under the same system pressure, the steering driving force generated by the extension and retraction cylinders is very different. It can be seen from the composition configuration of the steering system that in realizing the steering of heavy vehicles, the large cavity and the small cavity work together to realize the steering of heavy vehicles.

[0004] See also Figure 1 Two connecting frames 10 are installed on the steering axle 9, and left and right corner limit rods 11 are hinged between the two connecting frames 10. Steering cylinders 12 are hinged between the two connecting frames 10 and the steering axle 9, and the interior of the steering cylinder 12 has a large cavity 13 and a small cavity 14. The installation hinge point of the steering cylinder and the steering hinge point of the steering axle are both a. Figure 1 It can be seen from A in the figure that when the wheel is subjected to road impact (wheel edge impact) on a bumpy road, the steering cylinder cannot be recovered, so that the impact force will act directly on the steering cylinder. It can be concluded that the steering cylinder and the wheel are rigidly connected (equivalent to Figure 2 See Figure 2 , that is, there is a rigid connection between the steering cylinder and the wheel, so that the road impact will directly impact the hydraulic system and cause the hydraulic system pressure to increase; In addition, during the instant of steering, see Figure 3 The volume difference between the large cavity 13 and the small cavity 14 determines that there will be a pressure shock at the moment of left-right switching. There will inevitably be a pressure shock in the process of switching between the large cavity and the small cavity. In the process of forcing the left and right steering wheels to turn synchronously through the pull rod, and in the process of countless strong pulling and hard pulling, the installation hinge point of the steering cylinder and the steering hinge point of the steering axle will have excessive wear due to excessive friction, which will affect the steering accuracy, and it is also easy to cause mechanical damage or mechanical connection breakage, causing safety accidents. Summary of the invention

[0005] In view of this, the purpose of the present invention is to propose a fully hydraulic steering mechanism to realize a wire-controlled lubrication system to solve the problem that there is a pressure shock in the instantaneous process of steering, that is, in the process of switching between the large cavity and the small cavity. On the one hand, the impact force cannot be utilized, and on the other hand, the impact force will instantly act on the mechanical fixing point, which will cause connection fatigue at the mechanical connection during the continuous steering process, and it is also easy to cause the mechanical connection to break.

[0006] Based on the above purpose, the present invention provides a full hydraulic steering mechanism to realize a wire-controlled lubrication system, including a steering oil cylinder 1 and a steering oil cylinder 2, and the steering oil cylinder 1 and the steering oil cylinder 2 both have a large cavity and a small cavity, the steering oil cylinder 1 and the steering oil cylinder 2 can drive the steering axle by joint action, and realize left and right steering synchronization through a pull rod, the small cavity of the steering oil cylinder 1 and the large cavity of the steering oil cylinder 2 are provided with an oil supply pipe 1, and an oil pressure control valve 1 is installed on the oil supply pipe 1, the large cavity of the steering oil cylinder 1 and the small cavity of the steering oil cylinder 2 are provided with an oil supply pipe 2, and an oil pressure control valve 2 is provided on the oil supply pipe 2; the oil outlet ends of the oil pressure control valve 1 and the oil pressure control valve 2 are both provided with a lubrication system; The lubrication system comprises a lubrication pump, a lubrication oil tank and a lubrication distributor. The oil inlet of the lubrication pump is connected to the oil outlet of the first oil pressure control valve or the second oil pressure control valve, and the oil inlet of the lubrication pump is also connected to the lubrication oil tank. The oil outlet of the lubrication pump is connected to the lubrication distributor. The lubrication distributor is provided with a plurality of lubrication oil outlet ports. The lubrication oil outlet ports are connected to each lubrication point that needs to be lubricated through a lubrication pipe, and a pressure regulating spring is provided at the contact between the lubrication pipe and the lubrication point. When the steering cylinder 1 is recovered and the steering cylinder 2 is extended to realize the left turn of the whole vehicle, the lubrication process of the automatic lubrication system comprises the following steps: Step 1: Retract the piston rod of steering cylinder 1 and extend the piston rod of steering cylinder 2 to realize left steering of the vehicle; Step 2: When the pressure exceeds the set pressure value of the oil pressure control valve 1 at the moment of turning left, the pressure oil at that moment will cause the oil pressure control valve 1 to open, so that the pressure oil at the moment of turning can enter the lubrication pump through the oil pressure control valve 1; Step three, the lubrication pump works and sucks the lubrication oil in the lubrication oil tank into the lubrication distributor. The lubrication oil in the lubrication distributor enters the lubrication pipe through the lubrication oil outlet port, thereby lubricating the lubrication points that need to be lubricated on the left and right wheel edges.

[0007] Preferably, the oil pressure control valve 1 and the oil pressure control valve 2 are both safety relief valves, and the set pressure value of the safety relief valve is 7Mpa.

[0008] Preferably, the oil outlet end of the oil pressure control valve 1 is provided with a spring-loaded one-way pressure valve 1, and the oil outlet end of the oil pressure control valve 2 is provided with a spring-loaded one-way pressure valve 2, and the spring-loaded one-way pressure valve 1 and the spring-loaded one-way pressure valve 2 are respectively connected to their adjacent lubrication pumps.

[0009] Preferably, an oil replenishment one-way valve is provided between the lubricating oil tank and the lubricating distributor. If the lubricating oil distributor over-distributes and vacuum negative pressure appears at the lubricating point, the oil replenishment one-way valve opens, allowing the lubricating oil distributor to absorb the lubricating oil in the lubricating oil tank to lubricate the lubricating point.

[0010] Preferably, a hydraulic oil reflux tank is provided on the lubrication distributor. When the lubrication points are not lubricated, the hydraulic oil enters the lubrication pump through the oil pressure control valve, and the lubrication pump runs idle. At this time, the power oil impacted by the steering system enters the lubrication distributor and then flows back to the hydraulic oil reflux tank, automatically lubricating the no-load, and the pressure oil impacted by the steering system is returned.

[0011] Preferably, pressure gauges are provided at the inlet and outlet of the lubrication pump, and the pressure gauges are used to detect the lubrication pressure during the lubrication process.

[0012] Preferably, a pressure detection point one is provided on the oil supply pipe one, and a pressure detection point two is provided on the oil supply pipe two. When the pressure detection point one detects that the pressure in the oil supply pipe one exceeds 7Mpa, the oil pressure control valve one will open, allowing the hydraulic oil to enter the lubrication pump through the oil pressure control valve one. When the pressure detection point two detects that the pressure in the oil supply pipe two exceeds 7Mpa, the oil pressure control valve two will open, allowing the hydraulic oil to enter the lubrication pump through the oil pressure control valve two.

[0013] The beneficial effects of the present invention are as follows: 1. At the moment of steering switching (i.e., there is a pressure shock during the switching process between the large cavity and the small cavity), the steering system is impacted by the steering cylinder, or the wheel is subjected to road impact on a bumpy road. The present invention realizes that when the steering hydraulic system pressure exceeds the set pressure value of the oil pressure control valve (oil pressure control valve 1 or oil pressure control valve 2), the instantaneous pressure oil will cause the oil pressure control valve to open, and the pressure oil drives the lubrication pump, thereby driving the lubrication system to lubricate various lubrication points, thereby utilizing the instantaneous impact force generated during steering and the impact from the wheel side as the system power source to ultimately lubricate the lubrication points.

[0014] 2. Through the setting of the pressure gauge and the hydraulic oil return tank, when the lubrication point is not lubricated, the hydraulic oil enters the lubrication pump. When the lubrication pump is not working, the lubrication pump will idle, so that the hydraulic oil entering the lubrication distributor will enter the hydraulic oil return tank for reflux; when the pressure gauge detects that the pressure of the hydraulic oil reaches the preset pressure of the pressure gauge (the preset pressure of the pressure gauge is the maximum pressure that the lubrication pump or the lubrication pipe can withstand), the lubrication distributor will be connected with the hydraulic oil return tank, so that the hydraulic oil can enter the hydraulic oil return tank, which protects the lubrication system.

[0015] 3. Through the setting of the oil replenishment check valve, when the lubrication distributor over-distributes and vacuum negative pressure appears at the lubrication point, the oil replenishment check valve opens, allowing the lubrication distributor to absorb the lubricating oil in the lubricating oil tank to lubricate the lubrication point. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a structural schematic diagram of a steering axle driven by a steering cylinder according to an embodiment of the present invention; Figure 2 It is a schematic diagram of a rigid connection between a steering cylinder and a wheel (i.e., wheel side impact) according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of the large cavity and the small cavity in the steering cylinder according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the connection between the oil pressure control valve 1 and the oil pressure control valve 2 and the steering cylinder 1 and the steering cylinder 2 according to an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a lubrication system implemented in the present invention.

[0018] In the figure: 101, steering cylinder one; 102, steering cylinder two; 201, oil pressure control valve one; 202, oil pressure control valve two; 301, lubrication pump; 302, lubrication oil tank; 303, lubrication distributor; 304, lubrication oil outlet port; 305, lubrication pipe; 306, lubrication point; 307, pressure regulating spring; 401, spring-type one-way pressure valve one; 402, spring-type one-way pressure valve two; 5, oil replenishment one-way valve; 601, pressure detection point one; 602, pressure detection point two; 7, pressure gauge; 8, hydraulic oil return box; 9, steering axle; 10, connecting frame; 11, left and right turning angle limit rods; 12, steering cylinder; 13, large cavity; 14, small cavity. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0020] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connecting" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the full hydraulic steering mechanism realizes the wire-controlled lubrication system, including a steering cylinder 101 and a steering cylinder 102, and the steering cylinder 101 and the steering cylinder 102 both have a large chamber 13 and a small chamber 14 (the volume difference between the large chamber (rodless chamber) and the small chamber (rod chamber) determines that there will be a pressure shock at the moment of left-right switching), the steering cylinder 101 and the steering cylinder 102 can drive the steering axle by joint action, and realize left-right steering synchronization through the pull rod, and the small chamber of the steering cylinder 101 and the large chamber of the steering cylinder 102 are provided with an oil supply pipe 1, and an oil pressure control device is installed on the oil supply pipe 1. The large chamber of the steering cylinder 101 and the small chamber of the steering cylinder 102 are provided with an oil supply pipe 2, and an oil pressure control valve 202 is provided on the oil supply pipe 2; the oil outlet ends of the oil pressure control valve 201 and the oil pressure control valve 202 are both provided with a lubrication system; the lubrication system includes a lubrication pump 301, a lubrication oil tank 302 and a lubrication distributor 303. The lubrication pump 301 is not a pump that rotates all the time. The lubrication pump 301 can only be operated when the hydraulic oil impacts. The working pressure of the lubrication pump 301 is usually between 0.3-0.6Mpa, which belongs to the low pressure range, and a gear pump is mostly used. Therefore, when the pressure oil enters the lubrication pump 301, the lubrication pump 301 can work normally, the oil inlet end of the lubrication pump 301 is connected to the oil pressure control valve 1 201 or the oil outlet end of the oil pressure control valve 2 202, and the oil inlet end of the lubrication pump 301 is also connected to the lubrication oil tank 302, and the oil outlet end of the lubrication pump 301 is connected to the lubrication distributor 303, and the lubrication distributor 303 is provided with a plurality of lubrication oil outlet ports 304, and the lubrication oil outlet ports 304 are connected to each lubrication point 306 that needs to be lubricated through a lubrication pipe 305, and a pressure regulating spring 307 is provided at the contact point between the lubrication pipe 305 and the lubrication point 306. Through the setting of the pressure regulating spring 307, it can be adjusted according to the output situation of the lubrication point in the actual process, so as to achieve a good effect. The best lubrication effect is achieved; the oil pressure control valve 1 201 and the oil pressure control valve 2 202 can collect the pressure oil into the lubrication pump 301. When the lubrication pump 301 is working, the pressure oil is the power oil. If the lubrication pump 301 does not work, it will be unloaded and returned to the hydraulic oil return tank 8 through the lubrication distributor 303 to achieve the protection system. The oil pressure control valve 1 201 and the oil pressure control valve 2 202 are set to allow the hydraulic oil to enter the lubrication system through the steering system after the pressure shock. When the steering system is working normally, the hydraulic oil of the lubrication system is prevented from flowing back and affecting the steering system. The oil pressure control valve 1 201 and the oil pressure control valve 2 202 are both provided with springs (adjustable according to actual working conditions) to ensure the stability of the impacted pressure oil when it enters the lubrication pump.

[0022] When the steering cylinder 1 101 is retracted and the steering cylinder 2 102 is extended to realize the left turn of the whole vehicle, the lubrication process of the lubrication system includes the following steps: Step 1: The piston rod of the steering cylinder 1 101 is retracted and the piston rod of the steering cylinder 2 102 is extended to realize the left turn of the whole vehicle; Step 2: When the steering hydraulic system pressure exceeds the set pressure value of the oil pressure control valve 201 at the moment of left turning, the pressure oil at that moment will cause the oil pressure control valve 201 to open, so that the pressure oil at the moment of turning can enter the lubrication pump 301 through the oil pressure control valve 201; Step 3: The lubrication pump 301 works and sucks the lubrication oil in the lubrication oil tank 302 into the lubrication distributor 303. The lubrication oil in the lubrication distributor 303 enters the lubrication pipe 305 through the lubrication oil outlet port 304, thereby lubricating the lubrication points 306 that need to be lubricated on the left and right wheel edges.

[0023] In a preferred embodiment of the present invention, the oil pressure control valve 1 201 and the oil pressure control valve 2 202 are both safety relief valves, and the set pressure value of the safety relief valve is 7Mpa. The steering system pressure of 7MPa is the thrust generated by the steering cylinder (steering cylinder 1 and steering cylinder 2 in the present invention), which can push the steering system pressure of 20 tons of front axle load; the determination of the maximum steering pressure of the whole vehicle is determined by the cylinder diameter and the steering load of the front axle of the whole vehicle; that is, when the steering system hydraulic pressure is 7MPa, the steering cylinder we selected is sufficient to push the steering of the front axle load of 20T in a static state, and realize the steering function of the whole vehicle. The pressure set by the unloading valve (safety relief valve) is derived from this (7MPa).

[0024] In another preferred embodiment of the present invention, a spring-loaded one-way pressure valve 401 is provided at the oil outlet end of the oil pressure control valve 201, and a spring-loaded one-way pressure valve 402 is provided at the oil outlet end of the oil pressure control valve 202. The spring-loaded one-way pressure valve 401 and the spring-loaded one-way pressure valve 402 are respectively connected to their adjacent lubrication pumps 301. By setting the spring-loaded one-way pressure valve 401 and the spring-loaded one-way pressure valve 402, a smooth output of instantaneous power can be ensured. The preset pressure of the spring-loaded one-way pressure valve 401 or the spring-loaded one-way pressure valve 402 can be adjusted according to the lubrication pump 301 and the instantaneous impact of steering. The spring-loaded one-way pressure valve 401 and the spring-loaded one-way pressure valve 402 have the purpose of one-way conduction, thereby avoiding the mixing of the hydraulic oil in the steering cylinder 101 and the steering cylinder 2 102.

[0025] In another preferred embodiment of the present invention, an oil replenishing one-way valve 5 is provided between the lubricating oil tank 302 and the lubricating distributor 303. If the lubricating oil distributor 303 over-distributes and a vacuum negative pressure appears at the lubricating point 306, the oil replenishing one-way valve 5 opens, so that the lubricating oil distributor 303 can absorb the lubricating oil in the lubricating oil tank 302 to lubricate the lubricating point 306, thereby protecting the lubricating pump 301.

[0026] It should be noted that a hydraulic oil return tank 8 is provided on the lubrication distributor 303. When the lubrication point 306 is not lubricated, the hydraulic oil enters the lubrication pump 301 through the oil pressure control valve 201, and the lubrication pump 301 runs idle. At this time, the power oil impacted by the steering system enters the lubrication distributor 303 and then flows back to the hydraulic oil return tank 8, automatically lubricating the no-load state, and the pressure oil impacted by the steering system is returned, thereby achieving unloading and protecting the system.

[0027] It should be noted that a pressure gauge 7 is provided at the inlet and outlet of the lubrication pump 301, and the pressure gauge 7 is used to detect the lubrication pressure during the lubrication process to ensure the stable operation of the system. When the pressure gauge 7 detects that the pressure of the hydraulic oil exceeds the preset pressure of the pressure gauge 7 (the preset maximum pressure of the pressure gauge 7 is the maximum pressure that the lubrication pump 301 or the lubrication pipe 305 can withstand), the lubrication distributor 303 will be connected to the hydraulic oil return tank 8, so that the hydraulic oil can enter the hydraulic oil return tank 8, thereby protecting the lubrication system.

[0028] In addition, a pressure detection point 1 601 is provided on the oil supply pipe 1, and a pressure detection point 2 602 is provided on the oil supply pipe 2. When the pressure detection point 1 601 detects that the pressure in the oil supply pipe 1 exceeds 7Mpa, the oil pressure control valve 1 201 will open, allowing the hydraulic oil to enter the lubrication pump 301 through the oil pressure control valve 1 201. When the pressure detection point 2 602 detects that the pressure in the oil supply pipe 2 exceeds 7Mpa, the oil pressure control valve 2 202 will open, allowing the hydraulic oil to enter the lubrication pump 301 through the oil pressure control valve 202, thereby protecting the system.

[0029] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0030] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, 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. The fully hydraulic steering mechanism realizes a wire-controlled lubrication system, including a steering cylinder 1 (101) and a steering cylinder 2 (102). The steering cylinder 1 (101) and the steering cylinder 2 (102) can drive the steering axle by joint action, and realize left and right steering synchronization through a pull rod. It is characterized in that An oil supply pipe 1 is provided on the small chamber of the steering oil cylinder 1 (101) and the large chamber of the steering oil cylinder 2 (102), and an oil pressure control valve 1 (201) is installed on the oil supply pipe 1; an oil supply pipe 2 is provided on the large chamber of the steering oil cylinder 1 (101) and the small chamber of the steering oil cylinder 2 (102), and an oil pressure control valve 2 (202) is provided on the oil supply pipe 2; the oil outlet ends of the oil pressure control valve 1 (201) and the oil pressure control valve 2 (202) are both provided with a lubrication system; the lubrication system comprises a lubrication pump (301), a lubrication oil tank (302) and a lubrication distributor (303); the oil inlet end of the lubrication pump (301) is connected to the oil pressure control valve 1 (201) or the oil pressure control valve 2 (202). 02) oil outlet end is connected, and the oil inlet end of the lubricating pump (301) is also connected to the lubricating oil tank (302), the oil outlet end of the lubricating pump (301) is connected to the lubricating distributor (303), the lubricating distributor (303) is provided with a plurality of lubricating oil outlet ports (304), the lubricating oil outlet ports (304) are connected to each lubricating point (306) that needs to be lubricated through a lubricating pipe (305), and a pressure regulating spring (307) is provided at the contact point between the lubricating pipe (305) and the lubricating point (306); when the steering cylinder 1 (101) is recovered and the steering cylinder 2 (102) is extended to realize the left turn of the whole vehicle, the lubrication process of the automatic lubrication system includes the following steps: Step 1: The piston rod of the steering cylinder 1 (101) is retracted and the piston rod of the steering cylinder 2 (102) is extended to realize the left turn of the vehicle; Step 2: When the pressure exceeds the set pressure value of the oil pressure control valve 1 (201) at the moment of turning left, the pressure oil at that moment will cause the oil pressure control valve 1 (201) to open, so that the pressure oil at the moment of turning can enter the lubrication pump (301) through the oil pressure control valve 1 (201); Step 3: The lubrication pump (301) operates and sucks the lubrication oil in the lubrication oil tank (302) into the lubrication distributor (303). The lubrication oil in the lubrication distributor (303) enters the lubrication pipe (305) through the lubrication oil outlet port (304), thereby lubricating the lubrication points (306) that need to be lubricated on the left wheel edge and the right wheel edge.

2. The fully hydraulic steering mechanism according to claim 1 realizes a wire-controlled lubrication system, It is characterized in that The oil pressure control valve 1 (201) and the oil pressure control valve 2 (202) are both safety relief valves, and the set pressure value of the safety relief valve is 7Mpa.

3. The fully hydraulic steering mechanism according to claim 1 realizes a wire-controlled lubrication system, It is characterized in that The oil outlet end of the oil pressure control valve 1 (201) is provided with a spring-type one-way pressure valve 1 (401), and the oil outlet end of the oil pressure control valve 2 (202) is provided with a spring-type one-way pressure valve 2 (402). The spring-type one-way pressure valve 1 (401) and the spring-type one-way pressure valve 2 (402) are respectively connected to their adjacent lubrication pumps (301).

4. The fully hydraulic steering mechanism according to claim 1 realizes a wire-controlled lubrication system, It is characterized in that An oil replenishment check valve (5) is provided between the lubricating oil tank (302) and the lubricating distributor (303); if the lubricating oil distributor over-distributes and a vacuum negative pressure appears at the lubricating point (306), the oil replenishment check valve (5) opens, allowing the lubricating oil distributor (303) to absorb the lubricating oil in the lubricating oil tank (302) to lubricate the lubricating point (306).

5. The fully hydraulic steering mechanism according to claim 2 realizes a wire-controlled lubrication system, It is characterized in that The lubrication distributor (303) is provided with a hydraulic oil return tank (8). When the lubrication point (306) is not lubricated, the hydraulic oil enters the lubrication pump (301) through the oil pressure control valve 1 (201). The lubrication pump (301) runs idle. At this time, the power oil impacted by the steering system enters the lubrication distributor (303) and then flows back to the hydraulic oil return tank (8). The no-load lubrication is automatically performed, and the pressure oil impacted by the steering system is returned.

6. The fully hydraulic steering mechanism according to claim 5 realizes a wire-controlled lubrication system, It is characterized in that Pressure gauges (7) are provided at the inlet and outlet of the lubrication pump (301), and the pressure gauges (7) are used to detect the lubrication pressure during the lubrication process.

7. The fully hydraulic steering mechanism according to claim 6 realizes a wire-controlled lubrication system, It is characterized in that The oil supply pipe one is provided with a pressure detection point one (601), and the oil supply pipe two is provided with a pressure detection point two (602). When the pressure detection point one (601) detects that the pressure in the oil supply pipe one exceeds 7Mpa, the oil pressure control valve one (201) will open, allowing the hydraulic oil to enter the lubrication pump (301) through the oil pressure control valve one (201). When the pressure detection point two (602) detects that the pressure in the oil supply pipe two exceeds 7Mpa, the oil pressure control valve two (202) will open, allowing the hydraulic oil to enter the lubrication pump (301) through the oil pressure control valve two (202).

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