Automobile hydraulic power steering gear

Abstract

The invention relates to an automobile hydraulic power steering gear which comprises a shell, a piston, a steering gear and at least two exhaust valves. The shell is provided with a containing cavity extending upwards in an inclined mode, a containing cavity communicating with the side portion of the containing cavity, an oil return channel located on the upper side of the containing cavity, and a first installation hole inclining towards the containing cavity and communicating with the oil return channel and the first cavity. The piston is installed in the containing cavity so that the containing cavity can be divided into a first cavity and a second cavity which are located at the upper end and the lower end of the piston, the first cavity is communicated with the containing cavity, and the piston is provided with a second installation hole communicated with the containing cavity and the second cavity in a penetrating mode. A rack is formed on the side portion, facing the containing cavity, of the piston. And the two exhaust valves are respectively mounted in the first mounting hole and the second mounting hole. Air in the first cavity, the second cavity and the containing cavity can be automatically and rapidly exhausted to the oil return channel through the two exhaust valves, then flows back and turns to the oil can, and then is diffused into the atmosphere.

Description

Technical Field

[0001] The invention relates to the technical field of steering gears, and in particular to an automobile hydraulic power steering gear. Background Art

[0002] After the traditional hydraulic power steering gear is installed on the vehicle, it needs to be filled with hydraulic oil as the working oil of the steering gear. However, even if the vacuum filling method is adopted, there will be a certain amount of air in the entire steering hydraulic circuit. The residual air will cause steering jamming and abnormal noise, affecting driving comfort. If the steering gear is tilted at a certain angle during installation (the tilt angle is more than 10°), the residual air will eventually accumulate in the highest local areas of the upper and lower cavities of the steering gear, away from the oil channel of the steering gear, and it is a very laborious process to discharge it.

[0003] Generally, hydraulic power steering gears are not designed with exhaust mechanisms, and the steering gears need to be used for a long time before the air in the system can be exhausted; some steering gears are designed with manual exhaust mechanisms, but oil will overflow during exhaust, and there is a problem that the air cannot be completely exhausted. There are also steering gears designed with exhaust structures, and exhaust valves are installed on the valve body or piston. The exhaust valves are one-way structures, and the exhaust time is short. It takes multiple repetitions to exhaust clean air. Summary of the invention

[0004] Based on the above description, the present invention provides an automobile hydraulic power steering gear to solve the problems of the existing automobile hydraulic power steering gear being difficult to exhaust, unable to exhaust completely at one time or having oil leakage during exhaust.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] An automobile hydraulic power steering gear, comprising:

[0007] A housing having an accommodating chamber, an accommodating chamber, an oil return passage, and a first mounting hole, wherein the accommodating chamber extends obliquely upward, the accommodating chamber is connected to a side portion of the accommodating chamber, the oil return passage is located on an upper side of the accommodating chamber, and the first mounting hole is inclined toward the accommodating chamber and connects the oil return passage and the first chamber;

[0008] A piston is installed in the accommodating chamber to divide the accommodating chamber into a first cavity and a second cavity located at upper and lower ends of the piston, the first cavity is communicated with the accommodating chamber, the piston is penetrated by a second installation hole communicating with the accommodating chamber and the second cavity, and a rack is formed on the side of the piston facing the accommodating chamber;

[0009] a steering gear, mounted in the accommodating cavity and meshing with the rack; and,

[0010] At least two exhaust valves are respectively installed in the first mounting hole and the second mounting hole, each of the exhaust valves includes a valve body, a valve core and at least two elastic members, the valve body is provided with a through hole, two sealing surfaces relatively distributed along its axial direction are formed in the through hole, the valve core is installed between the two sealing surfaces, the two elastic members are installed in the through hole, respectively located on the opposite sides of the two sealing surfaces, and both abut against the valve core.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows:

[0012] Furthermore, the shell is also provided with an exhaust hole, the exhaust hole is connected with the accommodating cavity and the first cavity, and the exhaust hole is connected at the highest position of the accommodating cavity.

[0013] Furthermore, the exhaust hole is located below the first mounting hole, and an end of the exhaust hole connected to the accommodating cavity is lower than an end of the first mounting hole connected to the accommodating cavity, or is flush with an end of the first mounting hole connected to the accommodating cavity.

[0014] Furthermore, the diameter of the exhaust hole is d, 2.5mm≤d≤3.5mm.

[0015] Furthermore, the valve body further comprises:

[0016] The valve seat is provided with a mounting through hole, wherein the mounting through hole is divided into a first hole section, a second hole section, a third hole section and a fourth hole section which are connected in sequence and have increasing hole diameters in sequence; and,

[0017] a plug block installed in the fourth hole segment and having a connecting through hole extending in the same direction as the installing through hole, wherein the connecting through hole is divided into a fifth hole segment and a sixth hole segment connected to each other, wherein the hole diameter of the sixth hole segment is larger than the hole diameter of the fifth hole segment and is arranged toward the third hole segment;

[0018] Wherein, the two sealing surfaces are respectively formed on the side of the plug facing the third hole segment, and the step surface connecting the second hole segment and the third hole segment;

[0019] The through holes include the mounting through holes and the connecting through holes;

[0020] The valve core is installed in the third hole section;

[0021] The two elastic members are arranged at the second hole section and the sixth hole section.

[0022] Furthermore, the second hole segment and the sixth hole segment have the same hole diameter;

[0023] Each of the elastic members is configured as a spring and extends along the axial direction of the first mounting hole.

[0024] Furthermore, the first mounting hole is connected to the highest position of the first cavity.

[0025] Furthermore, the exhaust valve core is configured as a steel ball; and the two sealing surfaces are configured as sealing conical surfaces adapted to the steel ball.

[0026] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0027] When there is no steering or a slight steering is performed, there is no pressure difference or the pressure difference is extremely small at both ends of the two exhaust valves, so that the two elastic members abut against the valve core together, so that the valve core is away from the two sealing surfaces, so that the residual air in the second cavity can enter the first cavity through the corresponding through hole, and the residual air in the first cavity can enter the oil return channel 13 through the corresponding through hole and be brought into the oil tank of the whole vehicle by the oil.

[0028] When the automobile hydraulic power steering needs to turn left, the piston moves upward, the second cavity is at high pressure, the first cavity is at low pressure, and the pressure difference between the two ends of the exhaust valve installed in the second mounting hole is large, so it is in a closed state to avoid internal leakage. The first cavity and the oil return channel are both at low pressure, and the oil pressure is close. The pressure difference between the two ends of the exhaust valve installed in the first mounting hole is extremely small, and the valve core does not contact the two sealing surfaces and is in an open state. The air in the first cavity can be continuously discharged to the oil return channel.

[0029] When the automobile hydraulic power steering needs to turn right, the piston moves downward, the first cavity is at high pressure, and the second cavity is at low pressure. There is a large pressure difference at both ends of the two exhaust valves, so they are both closed to avoid leakage inside the automobile hydraulic power steering. In this way, the residual air in the housing can be continuously and automatically discharged when the steering wheel is not turned or the steering wheel is slightly turned, which is convenient to operate and the exhaust is fast. In addition, the first mounting hole is arranged close to the accommodating cavity, so even if the automobile hydraulic power steering is installed at an angle, the residual air can be discharged smoothly and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A cross-sectional schematic diagram of a hydraulic power steering device for an automobile provided by an embodiment of the present invention;

[0031] Figure 2 A schematic structural diagram of residual air accumulation in a hydraulic power steering device of an automobile provided by an embodiment of the present invention;

[0032] Figure 3 Schematic cross-sectional view of an exhaust valve in an embodiment of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Shell; 11. Accommodating chamber; 111. First cavity; 112. Second cavity; 12. Accommodating chamber; 13. Oil return channel; 14. First mounting hole; 15. Exhaust hole; 2. Piston; 21. Rack; 22. Second mounting hole; 3. Steering gear; 4. Exhaust valve; 41. Valve body; 411. Through hole; 4111. Sealing surface; 412. Valve seat; 413. Mounting through hole; 4131. First hole section; 4132. Second hole section; 4133. Third hole section; 4134. Fourth hole section; 414. Block; 415. Connecting through hole; 4151. Fifth hole section; 4152. Sixth hole section; 42. Valve core; 43. Elastic member; 431. Spring; a1. First position; a2. Second position; a3. Third position. DETAILED DESCRIPTION

[0035] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0037] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0038] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0039] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0040] Please refer to Figures 1 to 3 The present invention provides a vehicle hydraulic power steering device, comprising a housing 1, a piston 2, a steering gear 3 and an exhaust valve 4, wherein the housing 1 has a receiving chamber 11, a receiving chamber 12, an oil return passage 13 and a first mounting hole 14, wherein the receiving chamber 11 extends obliquely upward, the receiving chamber 12 is connected to the side of the receiving chamber 11, the oil return passage 13 is located on the upper side of the receiving chamber 11, the first mounting hole 14 is inclined toward the receiving chamber 12, connects the oil return passage 13 and the receiving chamber 11, and is arranged close to the receiving chamber 12; the piston 2 is installed in the receiving chamber 11 to separate the receiving chamber 11 into a first cavity 111 and a second cavity 112 located at the upper and lower ends of the piston 2, respectively, the first cavity 111 and the receiving chamber 12 are connected to each other. The piston 2 is connected to the accommodating chamber 12 and the second chamber 112, and a rack 21 extending in a first direction is formed on the side of the piston 2 facing the accommodating chamber 12; the steering gear 3 is installed in the accommodating chamber 12 and meshes with the rack 21; the exhaust valve 4 includes a valve body 41, a valve core 42 and at least two elastic members 43, the valve body 41 forms a through hole 411 extending along its length direction, and two sealing surfaces 4111 relatively distributed along its axial direction are formed in the through hole 411, the valve core 42 is installed between the two sealing surfaces 4111, and the two elastic members 43 are installed in the through hole 411, respectively located on the opposite sides of the two sealing surfaces 4111, and both abut against the valve core 42.

[0041] The first cavity 111 is connected to the accommodating cavity 12 , and the second cavity 112 is sealed. The rack 21 is formed on one side of the piston 2 facing the accommodating cavity 12 , and the rack 21 is meshed with the steering gear 3 .

[0042] When there is no steering or a slight steering is performed, there is no pressure difference or the pressure difference is extremely small at both ends of the two exhaust valves 4, so that the two elastic members 43 abut against the valve core 42 together, so that the valve core 42 is away from the two sealing surfaces 4111, so that the residual air in the second cavity 112 can enter the first cavity 111 through the corresponding through hole 411, and the residual air in the first cavity 111 can enter the oil return channel 13 through the corresponding through hole 411 and then be brought to the oil tank of the whole vehicle by the oil.

[0043] When the automobile hydraulic power steering needs to be in a left-turning state, the piston 2 moves upward, the second cavity 112 is at high pressure, the first cavity 112 is at low pressure, and the pressure difference between the two ends of the exhaust valve 4 installed in the second mounting hole 22 is large, so it is in a closed state and avoids internal leakage. The first cavity 1111 and the oil return channel 13 are both at low pressure, and the oil pressure is close. The pressure difference between the two ends of the exhaust valve 4 installed in the first mounting hole 14 is extremely small, and the valve core 42 does not contact the two sealing surfaces 4111, and is in an open state. The air in the first cavity 111 can be continuously discharged to the oil return channel 13.

[0044] When the automobile hydraulic power steering needs to turn right, the piston 2 moves downward, the first cavity 111 is at high pressure, the second cavity 112 is at low pressure, and there is a large pressure difference at both ends of the two exhaust valves 4, so both are closed to avoid leakage inside the automobile hydraulic power steering. In this way, the residual air in the housing 1 can be continuously and automatically discharged when the steering wheel is not turned or the steering wheel is slightly turned, which is convenient to operate and the exhaust is fast. In addition, the first mounting hole 14 is arranged close to the accommodating cavity 12, so that even if the automobile hydraulic power steering is installed at an angle, the residual air can be discharged smoothly and quickly.

[0045] When the automobile hydraulic power steering gear is tilted, since gas is lighter than oil, the residual air is accumulated at the highest points of the first cavity 111, the second cavity 112 and the accommodating cavity 12. In this embodiment, referring to Figure 2 The residual gas in the first cavity 111 accumulates at a first position a1, the residual gas in the second cavity 112 accumulates at a second position a2, and the residual gas in the accommodating cavity 12 accumulates at a third position a3.

[0046] It should be noted that the piston is pushed up and down by oil. The exhaust valve 4 installed in the first installation hole 14 is set as a first exhaust valve, and the exhaust valve 4 installed in the second installation hole 22 is set as a second exhaust valve.

[0047] When there is no turn or a slight turn, there is no pressure difference or a very small pressure difference at both ends of the two exhaust valves 4, and both are in an open state. The residual gas at the first position a1, the second position a2 and the third position a3 can flow into the oil return channel 13 along with the oil, and then be discharged from the oil return channel 13. When turning left, the first exhaust valve is in an open state, so that the residual gas at the first position a1 and the third position a3 is discharged to the oil return channel 12, and the second exhaust valve is closed to avoid internal leakage and ensure that the piston 2 can move up smoothly. When turning right, both exhaust valves are closed to avoid internal leakage and ensure that the piston 2 can move down smoothly.

[0048] Specifically, refer to Figure 1 and Figure 3 The valve body 41 further comprises a valve seat 412 and a plug 414. The valve seat 412 is installed in the first installation hole 14. The valve seat 412 has a mounting through hole 413 in the same extending direction as the first installation hole 14. The mounting through hole 413 is divided into a first hole section 4131, a second hole section 4132, a third hole section 4133 and a fourth hole section 4134 which are connected in sequence and have increasing apertures in sequence. The plug 414 is installed in the fourth hole section 4134 and has a connecting through hole 415 in the same extending direction as the first installation hole 14. The connecting through hole 415 is divided into a fifth hole section 4131 connected to the first hole section 4132, a third hole section 4133 and a fourth hole section 4134. 51 and a sixth hole section 4152, the aperture of the sixth hole section 4152 is larger than the aperture of the fifth hole section 4151 and is arranged toward the third hole section 4133; wherein the two sealing surfaces 4111 are respectively formed on the side of the plug block 414 facing the third hole section 4133, and the step surface connecting the second hole section 4132 and the third hole section 4133; the through hole 411 includes the mounting through hole 413 and the connecting through hole 415; the valve core 42 is installed in the third hole section 4133; the two elastic members 43 are arranged in the second hole section 4132 and the sixth hole section 4152.

[0049] In this embodiment, one end of the two elastic members 43 abuts against the step surface between the first hole segment 4131 and the second hole segment 4132, and the step surface between the fifth hole segment 4151 and the sixth hole segment 4152, respectively, and the other end abuts against the valve core 42. Thus, the two elastic members 43 are stably installed in the second hole segment 4132 and the sixth hole segment 4152. In this way, the structure is simple and easy to set.

[0050] Specifically, continue to refer to Figure 1 and Figure 3The second hole section 4132 and the sixth hole section 4152 have the same aperture, and the two springs 431 have the same length and elastic coefficient, so that when the pressure at both ends of the through hole 411 is the same, they maintain a natural straight state to clamp the valve core 42 together, so that the valve core 42 is away from the two sealing surfaces 4111, and the through hole 411 can be exhausted; each elastic member 43 is set as a spring 431 and extends along the axial direction of the first mounting hole 14. The spring 431 has good elasticity, stable structure and long service life.

[0051] In this embodiment, refer to Figures 1 to 3 When the steering gear 3 is in the neutral position, the through hole 411 of the second exhaust valve communicates with the second cavity 112 and the accommodating cavity 12, so that the residual gas in the second cavity 112 flows into the accommodating cavity 12. Since the accommodating cavity 12 is connected with the first cavity 111, the residual gas discharged from the second cavity 112 merges with the residual gas in the first cavity 111. When the steering gear 3 is rotated to make the piston 2 move downward, the merged residual gas is discharged into the oil return channel 13 through the exhaust valve 4 installed in the first mounting hole 14, flows back to the oil pot with the oil through the oil pipe, and finally is discharged from the oil pot into the atmosphere. In this way, the exhaust can be more comprehensive to ensure the performance of the whole vehicle.

[0052] In order to speed up the exhaust speed, in this embodiment, refer to Figure 1 and Figure 2 The housing 1 is further provided with an exhaust hole 15, which is connected to the accommodating chamber 12 and the first cavity 111, and the exhaust hole 15 is connected to the highest position of the accommodating chamber 12. Thus, the residual gas at the third position a3 in the accommodating chamber 12 can be more quickly merged with the residual gas in the first cavity 111, and then discharged through the exhaust valve 4 installed in the first installation hole 14. And the residual gas at the third position a3 all flows to the first cavity 111 through the exhaust hole 15, avoiding insufficient exhaust.

[0053] Further, the exhaust hole 15 is located below the first mounting hole 14, and the end of the exhaust hole 15 communicating with the accommodating cavity 12 is lower than the end of the first mounting hole 14 communicating with the accommodating cavity 12, or is flush with the end of the first mounting hole 14 communicating with the accommodating cavity. Thus, it is ensured that the gas accumulated at the third position a3 can flow into the first position a1 through the exhaust hole 15, and the gas is smoothly discharged.

[0054] Specifically, the diameter of the exhaust hole 15 is d, 2.5 mm≤d≤3.5 mm. In this embodiment, d=3 mm.

[0055] In this embodiment, one end of the first mounting hole 14 is connected to the oil return channel 13, and the other end is inclined toward the accommodating chamber 12. In this way, the residual gas at the first position a1 of the first cavity 111 can be completely discharged, ensuring sufficient and rapid exhaust.

[0056] In this embodiment, the valve core 42 is configured as a steel ball, and the two sealing surfaces 4111 are configured as sealing conical surfaces adapted to the steel ball, so that the fitting is tight, the sealing effect is good, and oil leakage is avoided.

[0057] The arrangement of the springs 431 of the first exhaust valve and the springs 431 of the second exhaust valve is not limited here. Specifically, the steering wheel is slightly rotated, and at this time, the pressure on the springs 431 of the first exhaust valve and the second exhaust valve is only required to be less than the elastic force, and both exhaust valves automatically continue to exhaust. The slight rotation here means that the torque on the steering wheel is not greater than 2N·m.

[0058] The arrangement of the springs 431 of the first exhaust valve and the springs 431 of the second exhaust valve is not limited here. Specifically, the steering wheel is slightly turned, and as long as the pressure on the springs 431 of the first exhaust valve and the second exhaust valve is less than the elastic force, the two exhaust valves 4 will automatically continue to exhaust.

[0059] In addition, when the automobile hydraulic power steering turns left, the piston 2 moves upward. At this time, the pressure of the second cavity 112 is greater than that of the first cavity 111. The pressure on the second exhaust valve increases, and the spring 431 that squeezes the second exhaust valve is deformed, so that the second exhaust valve closes its through hole 411. At this time, the first cavity 111 is low pressure, which is almost the same as the pressure of the return oil channel 13. The pressure difference between the two ends of the first exhaust valve is very small, and the spring 431 of the first exhaust valve is naturally straightened. The first cavity 111 can be continuously exhausted when turning left, thereby accelerating the exhaust process. Because the automobile hydraulic power steering can continue to exhaust when turning left, and most of the air accumulates in the first cavity, the air inside the automobile hydraulic power steering can be quickly and cleanly discharged after the automobile hydraulic power steering rotates left and right 2 to 3 times normally.

[0060] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automobile hydraulic power steering gear, characterized in that: include: A housing having an accommodating chamber, an accommodating chamber, an oil return passage, and a first mounting hole, wherein the accommodating chamber extends obliquely upward, the accommodating chamber is connected to a side portion of the accommodating chamber, the oil return passage is located on an upper side of the accommodating chamber, and the first mounting hole is inclined toward the accommodating chamber and connects the oil return passage and the first chamber; A piston is installed in the accommodating chamber to divide the accommodating chamber into a first cavity and a second cavity located at upper and lower ends of the piston, the first cavity is communicated with the accommodating chamber, the piston is penetrated by a second installation hole communicating with the accommodating chamber and the second cavity, and a rack is formed on the side of the piston facing the accommodating chamber; a steering gear, mounted in the accommodating cavity and meshing with the rack; and, At least two exhaust valves are respectively installed in the first mounting hole and the second mounting hole, each of the exhaust valves includes a valve body, a valve core and at least two elastic members, the valve body is provided with a through hole, two sealing surfaces relatively distributed along its axial direction are formed in the through hole, the valve core is installed between the two sealing surfaces, the two elastic members are installed in the through hole, respectively located on the opposite sides of the two sealing surfaces, and both abut against the valve core.

2. The automotive hydraulic power steering gear according to claim 1, characterized in that: The shell is further provided with an exhaust hole, the exhaust hole is connected with the accommodating cavity and the first cavity, and the exhaust hole is connected with the highest position of the accommodating cavity.

3. The automotive hydraulic power steering gear according to claim 2, characterized in that: The exhaust hole is located below the first mounting hole, and an end of the exhaust hole connected to the accommodating cavity is lower than an end of the first mounting hole connected to the accommodating cavity, or is flush with an end of the first mounting hole connected to the accommodating cavity.

4. The automotive hydraulic power steering gear according to claim 2, characterized in that: The diameter of the exhaust hole is d, 2.5mm≤d≤3.5mm.

5. The automotive hydraulic power steering gear according to claim 1, characterized in that: The valve body also includes: The valve seat is provided with a mounting through hole, wherein the mounting through hole is divided into a first hole section, a second hole section, a third hole section and a fourth hole section which are connected in sequence and have increasing hole diameters in sequence; and, a plug block installed in the fourth hole segment and having a connecting through hole extending in the same direction as the installing through hole, wherein the connecting through hole is divided into a fifth hole segment and a sixth hole segment connected to each other, wherein the hole diameter of the sixth hole segment is larger than the hole diameter of the fifth hole segment and is arranged toward the third hole segment; Wherein, the two sealing surfaces are respectively formed on the side of the plug facing the third hole segment, and the step surface connecting the second hole segment and the third hole segment; The through holes include the mounting through holes and the connecting through holes; The valve core is installed in the third hole section; The two elastic members are arranged at the second hole section and the sixth hole section.

6. The automotive hydraulic power steering gear according to claim 5, characterized in that: The second hole segment and the sixth hole segment have the same hole diameter; Each of the elastic members is configured as a spring and extends along the axial direction of the first mounting hole.

7. The automotive hydraulic power steering gear according to claim 1, characterized in that: The first mounting hole is connected to the highest position of the first cavity.

8. The automotive hydraulic power steering gear according to claim 1, characterized in that: The exhaust valve core is configured as a steel ball; and the two sealing surfaces are configured as sealing conical surfaces adapted to the steel ball.

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