Power-assisted steering gear and vehicle

Abstract

The embodiment of the utility model relates to the technical field of vehicle manufacturing, and discloses a power-assisted steering gear and a vehicle. The power-assisted steering gear provided by the embodiment of the utility model comprises a shell provided with a first cooling port and a second cooling port; the core shaft is arranged in the shell and extends along the axial direction of the shell; the stator assembly is arranged on the inner wall surface of the shell; the rotor assembly is arranged outside the core shaft in a sleeving mode and drives the core shaft to move in the axial direction of the shell under driving of the stator assembly; the cooling cavity comprises a first cooling cavity and a second cooling cavity, the first cooling cavity is communicated with the first cooling opening, and the second cooling cavity is communicated with the second cooling opening; and the liquid supply container is connected between the first cooling cavity and the second cooling cavity through a first one-way loop and a second one-way loop. According to the power-assisted steering gear, cooling and heat dissipation can be achieved without extra power, the cooling structure is simple in design, the cooling effect is good, and the service life of the power-assisted steering gear can be prolonged.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of vehicle manufacturing technology, and in particular to a power steering device and a vehicle. Background Art

[0002] With the development of electric vehicles and autonomous driving technology, linear motor power steering has attracted widespread attention due to its high efficiency, energy saving and easy integration and control, and is considered to be one of the important technologies for future automotive steering systems.

[0003] However, when the linear motor steering gear is working, it generates a lot of heat due to the large number of coil windings arranged, which affects the performance and life of the motor and hinders the development of this technology.

[0004] To address the above issues, the linear motor steering gear is mainly cooled by a radiator. However, most current radiators require a complex heat dissipation structure, resulting in high heat dissipation costs and poor heat dissipation effects. Utility Model Content

[0005] In view of this, an embodiment of the present application provides a power steering gear and a vehicle. The power steering gear is designed with a heat dissipation system based on a water cooling method. It does not require additional power and relies on the steering force of the power steering gear itself during the left and right steering process to provide power for the circulation of the coolant. It has a simple structure and has a good cooling effect.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0007] One aspect of an embodiment of the present application provides a power steering device, comprising: a shell, provided with a first cooling port and a second cooling port; a core shaft, arranged in the shell and extending axially along the shell; a stator assembly, arranged on the inner wall surface of the shell; a movable assembly, sleeved outside the core shaft, and driven by the stator assembly, driving the core shaft to move axially along the shell; a cooling chamber, comprising a first cooling chamber and a second cooling chamber; the first cooling chamber is located between the first end of the movable assembly and the corresponding end of the shell, and the first cooling port is connected to the first cooling chamber; the second cooling chamber is located between the second end of the movable assembly and the corresponding end of the shell, and the second cooling port is connected to the second cooling chamber; a liquid supply container is connected between the first cooling chamber and the second cooling chamber through a first one-way loop and a second one-way loop.

[0008] A power steering gear provided in an embodiment of the present application includes a housing, a core shaft, a stator assembly, a mover assembly, a cooling chamber, and a liquid supply container. The core shaft is disposed within the housing, the stator assembly is disposed on the inner surface of the housing, and the mover assembly is sleeved around the core shaft. Driven by the stator assembly, the mover assembly drives the core shaft in axial motion along the housing. The housing is provided with a first cooling port and a second cooling port. The annular space between the housing and the core shaft is separated by the two ends of the mover assembly to form a first cooling chamber and a second cooling chamber. The first cooling port communicates with the first cooling chamber, and the second cooling port communicates with the second cooling chamber. The liquid supply container is connected between the first cooling port and the second cooling chamber via a first one-way circuit and a second one-way circuit. As the power steering gear turns left or right, the volumes of the first cooling chamber and the second cooling chamber change, allowing coolant to circulate between the power steering gear and the liquid supply container, thereby cooling and dissipating heat from the power steering gear. Consequently, the power steering gear of the present application can cool the power steering gear without requiring an additional power source. The structural design is simple, and the cooling effect is excellent, which helps to extend the service life of the power steering gear.

[0009] In a possible embodiment, the cooling chamber further includes: a third cooling chamber located between the mover assembly and the core shaft and connected to at least one of the first cooling chamber and the second cooling chamber.

[0010] In a possible implementation, a communication hole is provided at one end of the third cooling cavity facing the first cooling cavity, or a communication hole is provided at one end of the third cooling cavity facing the second cooling cavity.

[0011] In this way, when the coolant circulates in the first cooling cavity or the second cooling cavity, the coolant can flow into the third cooling cavity through the communicating hole to cool the mover assembly.

[0012] In a possible embodiment, the first cooling port is connected to the first main pipe, the second cooling port is connected to the second main pipe, the liquid inlet of the liquid supply container is connected to the liquid inlet main pipe, and the liquid outlet of the liquid supply container is connected to the liquid outlet main pipe; a first liquid discharge pipeline is connected between the first main pipe and the liquid inlet main pipe, and a first liquid inlet pipeline is connected between the first main pipe and the liquid outlet main pipe; a second liquid discharge pipeline is connected between the second main pipe and the liquid inlet main pipe, and a second liquid inlet pipeline is connected between the second main pipe and the liquid outlet main pipe; wherein, the first main pipe, the first liquid discharge pipeline, the liquid inlet main pipe, the liquid outlet main pipe, the second liquid inlet pipeline, and the second main pipe constitute a first one-way loop; the second main pipe, the second liquid discharge pipeline, the liquid inlet main pipe, the liquid outlet main pipe, the first liquid inlet pipeline, and the first main pipe constitute a second one-way loop.

[0013] In this way, when the steering gear turns left or right, the water in the first cooling chamber and the second cooling chamber can circulate with the coolant in the liquid supply container through these pipes, thereby cooling the steering gear.

[0014] In a possible implementation, the first liquid discharge pipeline is provided with a first one-way valve, the first liquid inlet pipeline is provided with a second one-way valve, the second liquid discharge pipeline is provided with a third one-way valve, and the second liquid inlet pipeline is provided with a fourth one-way valve.

[0015] By setting a one-way valve on the pipeline, the flow direction of the coolant can be controlled to ensure one-way flow of the coolant and prevent coolant backflow.

[0016] In a possible embodiment, the stator assembly includes: a coil support mounted on the inner wall surface of the housing and having a plurality of spaced-apart isolation portions; and a plurality of coil windings, each coil winding being sequentially arranged between adjacent isolation portions.

[0017] By providing an isolation portion, the coil bracket can be fixed to prevent the coil bracket from falling apart, and the coil winding can generate magnetic forces of different sizes according to the signal transmitted from the steering wheel.

[0018] In a possible implementation, the stator assembly further includes: coil baffles, which are disposed at both ends of the coil support.

[0019] In this way, the coil support can be fixed and protected.

[0020] In a possible embodiment, the mover assembly includes: a permanent magnet mover, which is sleeved outside the core shaft; and a fixing seat, which is disposed against the outer wall of the core shaft and supported at both ends of the permanent magnet mover.

[0021] The permanent magnet mover is sleeved outside the core shaft and can drive the core shaft to move along the axial direction of the shell under the drive of the stator assembly. The fixing seat can fix the permanent magnet mover.

[0022] In a possible implementation, the permanent magnet mover includes: a plurality of permanent magnets arranged in sequence along the axial direction of the core shaft; and a retaining frame spaced between adjacent permanent magnets.

[0023] The permanent magnet mover can cooperate with the coil winding to drive the core shaft to move left or right. The retaining frame is placed at intervals between adjacent permanent magnets to provide fixed support for the permanent magnets.

[0024] Another aspect of the present invention provides a vehicle including the power steering device described above. The vehicle has all the beneficial effects of the power steering device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A partial structural diagram of a vehicle provided in an embodiment of the present application;

[0026] Figure 2 A cross-sectional view of the power steering structure provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of a coolant circulation path for a steering gear provided in an embodiment of the present application during a left steering action;

[0028] Figure 4 Schematic diagram of the coolant circulation path of the steering gear provided in an embodiment of the present application during right steering action.

[0029] Reference numerals:

[0030] 10-Power steering gear; 20-Suspension shock absorber; 30-Suspension subframe; 40-Wheel;

[0031] 100-housing;

[0032] 110-first cooling port; 120-second cooling port; 130-sealing ring; 140-bolt; 150-guide seat;

[0033] 111-First General Manager; 121-Second General Manager;

[0034] 200-mandrel;

[0035] 300- stator assembly;

[0036] 310-coil support; 320-coil winding; 330-coil baffle;

[0037] 400-moving subassembly;

[0038] 410-permanent magnet mover; 420-fixed seat; 430-left baffle; 440-right baffle; 450-metal retaining ring;

[0039] 411-permanent magnet; 412-cage;

[0040] 500-cooling chamber;

[0041] 510 - first cooling chamber; 520 - second cooling chamber; 530 - third cooling chamber;

[0042] 531- communicating hole;

[0043] 600-Liquid supply container;

[0044] 610-Liquid inlet main pipe; 620-Liquid outlet main pipe;

[0045] 700-connecting pipes;

[0046] 710 - first liquid discharge pipeline; 720 - first liquid inlet pipeline; 730 - second liquid discharge pipeline; 740 - second liquid inlet pipeline;

[0047] 711 - first one-way valve; 721 - second one-way valve; 731 - third one-way valve; 741 - fourth one-way valve;

[0048] 800-Dust cover. DETAILED DESCRIPTION

[0049] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.

[0050] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.

[0051] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to changes in the orientation of the components in the drawings.

[0052] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0053] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0054] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0055] The embodiments of the present application provide a vehicle. The vehicle may refer to a large automobile, a small automobile, a special-purpose vehicle, and the like. For example, based on the vehicle type, the vehicle in the present application may be a sedan, an off-road vehicle, a multi-purpose vehicle (MPV), or other vehicle types. A vehicle generally includes wheels, a power source, and a transmission system disposed between the wheels and the power source. The transmission system is capable of transmitting power provided by the power source to the wheels, causing the wheels to rotate, thereby driving the vehicle.

[0056] It should be noted that in the embodiments of this application, the type of vehicle power source is not limited. For example, for a fuel-powered vehicle, the power source may refer to a gasoline engine, a diesel engine, or other fuel-powered engine; for an electric vehicle, the power source may refer to an electric motor; for a hybrid vehicle, the power source may refer to an engine or an electric motor; and for a vehicle powered by other means, the power source may refer to a device that generates power.

[0057] As mentioned in the background, linear motor power steering systems have attracted widespread attention due to their high efficiency, energy efficiency, and ease of integrated control. They are considered a key technology for future automotive steering systems. However, due to the large number of coil windings, linear motor power steering systems generate significant heat during operation, which affects the motor's performance and lifespan, hindering the development of this technology.

[0058] In view of this, an embodiment of the present application provides a power steering gear comprising a housing, a core shaft, a stator assembly, a mover assembly, a cooling chamber, and a liquid supply container. The core shaft is disposed within the housing, the stator assembly is disposed on the inner surface of the housing, and the mover assembly is sleeved around the core shaft. Driven by the stator assembly, the mover assembly drives the core shaft in an axial direction of the housing. The housing is provided with a first cooling port and a second cooling port. The annular space between the housing and the core shaft is separated at both ends of the mover assembly to form a first cooling chamber and a second cooling chamber. The first cooling port communicates with the first cooling chamber, and the second cooling port communicates with the second cooling chamber. The liquid supply container is connected between the first cooling port and the second cooling chamber via a first one-way circuit and a second one-way circuit. As the power steering gear turns left or right, the volumes of the first cooling chamber and the second cooling chamber change, allowing coolant to circulate between the power steering gear and the liquid supply container, thereby cooling and dissipating heat from the power steering gear. Consequently, the power steering gear of the present application can cool the power steering gear without requiring an additional power source. The structural design is simple, and the cooling effect is excellent, which helps to extend the service life of the power steering gear.

[0059] Figure 1The partial structural diagram of the vehicle provided in the embodiment of the present application includes a power steering gear 10, a suspension shock absorber 20, a suspension subframe 30, and a wheel 40. The suspension shock absorber 20 is typically installed between the vehicle frame and the axle, and can absorb and mitigate vehicle body vibrations caused by uneven road surfaces during driving, thereby improving ride comfort. The suspension subframe 30 can connect components such as springs and suspension shock absorbers and transmit forces and torques to the vehicle body. The wheel 40 can change the vehicle's direction of travel under the action of the power steering gear 10.

[0060] The power steering gear 10 eliminates the traditional rotary power-assisted motor and instead utilizes a linear motor mounted within the steering gear housing. This design offers the advantage of a linear motor that directly generates linear motion, effectively driving the steering mechanism and providing steering assistance. Compared to traditional rotary motors, linear motors eliminate complex transmission mechanisms such as gear reducers and drive belts. This not only simplifies the steering system's structure but also improves its response speed and control accuracy.

[0061] Figure 2 This is a cross-sectional view of the power steering structure provided by the embodiment of the present application. Figure 2 As shown, the power steering gear 10 provided in the embodiment of the present application includes a housing 100 and a core shaft 200. The housing 100 can provide support and protection for some key parts of the power steering gear 10 to ensure the stability and safety of the power steering gear during operation. For example, the material of the housing 100 can be selected from cast iron materials with good strength and rigidity, or an aluminum alloy material with low density and good thermal conductivity can also be used. The embodiment of the present application does not impose specific restrictions on this. The core shaft 200 is installed in the housing 100 and extends along the axial direction of the housing 100. The core shaft 200 can move axially to the left or right in the housing 100, thereby controlling the steering of the power steering gear.

[0062] In addition, the housing further includes a guide seat 150 ， The guide seat 150 is provided at both ends of the housing 100. For example, the portion where the housing 100 and the guide seat 150 are connected can be provided with a stepped surface so that the guide seat 150 can be placed against the stepped surface. In addition, the housing 100 and the guide seat 150 can be connected by bolts 140 to ensure the stability of the structure. At the same time, the use of bolts 140 to connect can also simplify the assembly process and reduce the difficulty of assembly. A guide hole can be provided in the middle of the guide seat 150, and the core shaft 200 can pass through the guide hole, thereby enabling the guide seat 150 to guide the core shaft 200. In addition, a sealing ring 130 can also be provided in the housing 100, which can be used for sealing between the housing 100 and other parts.

[0063] The power steering device 10 further includes a linear motor, which is disposed in the housing 100 and can control the core shaft 200 to move left or right. Specifically, the linear motor includes a stator assembly 300 and a mover assembly 400.

[0064] The stator assembly 300 is disposed on the inner wall of the housing 100 and includes a coil support 310 and a plurality of coil windings 320. ， The coil holder 310 is mounted on the inner wall of the housing 100 and has multiple spaced-apart isolation sections 311. These isolation sections 311 secure the coil holder 310 and prevent it from falling apart. Multiple coil windings 320 are positioned between adjacent isolation sections 311. These coil windings 320 are a key component of the linear motor. When a signal is received from the steering wheel (not shown), the coil windings 320 generate a variable current based on an algorithm, generating varying magnetic forces depending on the current.

[0065] In a possible embodiment, the stator assembly 300 may further include a coil baffle 330 . The coil baffle 330 may be disposed at both ends of the coil support 310 , and is used to protect and fix the coil winding 320 .

[0066] The mover assembly 400 is sleeved outside the core shaft 200. The mover assembly 400 can drive the core shaft 200 to move axially along the housing 100 under the drive of the stator assembly 300. The mover assembly 400 includes a permanent magnet mover 410 sleeved outside the core shaft 200. The permanent magnet mover 410 is composed of a plurality of permanent magnets 411 and a retaining frame 412. The permanent magnets 411 can cooperate with the coil winding 320. Specifically, the coil winding 320 can generate different magnetic forces according to different currents. The magnetic force will carry the permanent magnet 411 to make a linear motion, causing the core shaft 200 to move left or right.

[0067] For example, there is a gap between the permanent magnet mover 410 and the core shaft 200. There may be a gap between the permanent magnet mover 410 and the stator assembly 300, or there may not be a gap. This embodiment of the application does not make any specific requirements for this.

[0068] The mover assembly 400 further includes a fixing seat 420 for fixing the mover assembly 400. The fixing seat 420 is disposed against the outer wall of the core shaft 200 and supported at both ends of the permanent magnet mover 410. For example, a stepped surface may be provided on the core shaft 200 at a position corresponding to the fixing seat 420, and the fixing seat 420 may be disposed against the stepped surface. This design effectively prevents the fixing seat 420 from sliding in the axial direction, thereby increasing the stability of the fixing seat 420 and ensuring that it does not shift during operation.

[0069] The mover assembly 400 may further include a left baffle 430, a right baffle 440, and a metal retaining ring 450. The left baffle 430 abuts against the fixing seat 420 at one end of the mover assembly 400, while the right baffle 440 abuts against the fixing seat 420 at the other end of the mover assembly 400. The left baffle 430 and the right baffle 440 define the fixing seats 420 at both ends. The metal retaining ring 450 serves as a fastener for securing the fixing seat 420 and limiting its relative movement.

[0070] The power steering gear also includes a dust cover 800, which is mounted on both ends of the housing 100 to protect the power steering gear 10 from dust, moisture, or other contaminants. For example, a sealing ring may be installed between the dust cover 800 and the housing 100 to ensure a tight seal between the dust cover 800 and the housing 100. Furthermore, the dust cover 800 may be connected to the housing 100 via bolts, snaps, or other fastening devices, as long as they ensure stability during vehicle operation. This embodiment of the present application does not impose any specific limitations on this.

[0071] The power steering gear 10 further includes a cooling chamber 500, which includes a first cooling chamber 510 and a second cooling chamber 520. The first cooling chamber 510 is disposed between a first end of the movable subassembly 400 and a corresponding end of the housing 100; the second cooling chamber 520 is disposed between a second end of the movable subassembly 400 and a corresponding end of the housing 100.

[0072] In one possible embodiment, the cooling chamber 500 may further include a third cooling chamber 530, which is disposed between the movable subassembly 400 and the core shaft 200. Furthermore, the third cooling chamber 530 is in communication with at least one of the first cooling chamber 510 or the second cooling chamber 520. For example, a connecting hole 531 is provided at one end of the third cooling chamber 530 facing the first cooling chamber 510, and the third cooling chamber 530 is in communication with the first cooling chamber 510 through the connecting hole 531. Alternatively, a connecting hole 531 is provided at one end of the third cooling chamber 530 facing the second cooling chamber 520, and the third cooling chamber 530 is in communication with the second cooling chamber 520 through the connecting hole 531. Of course, the third cooling chamber 530 may also be in communication with both the first cooling chamber 510 and the second cooling chamber 520 at the same time.

[0073] The power steering gear 10 also includes a liquid supply container 600, which stores coolant. The housing 100 is provided with a first cooling port 110 and a second cooling port 120. During left and right steering, the first cooling port 110 and the second cooling port 120 function as a water outlet and inlet, respectively, to exchange temperature with the external liquid supply container 600.

[0074] When the power steering gear 10 is working, a large amount of heat is generated due to the large number of coil windings 320. Therefore, during the left and right steering process of the power steering gear 10, the coolant can flow and circulate between the liquid supply container 600 and the first cooling chamber 510, the second cooling chamber 520, and the third cooling chamber 530 to help absorb and disperse the heat, thereby regulating the temperature of the power steering gear 10 and preventing overheating.

[0075] The first cooling port 110 is connected to a first manifold 111, and the second cooling port 120 is connected to a second manifold 121. The liquid inlet of the liquid supply container 600 is connected to a liquid inlet manifold 610, and the liquid outlet of the liquid supply container 600 is connected to a liquid outlet manifold 620. The power steering gear 10 also includes a connecting pipeline 700, which includes a first liquid discharge pipeline 710, a first liquid inlet pipeline 720, a second liquid discharge pipeline 730, and a second liquid inlet pipeline 740.

[0076] Specifically, the first liquid discharge pipeline 710 is connected between the first main pipe 111 and the liquid inlet main pipe 610; the first liquid inlet pipeline 720 is connected between the first main pipe 111 and the liquid outlet main pipe 620; the second liquid discharge pipeline 730 is connected between the second main pipe 121 and the liquid inlet main pipe 610; and the second liquid inlet pipeline (740) is connected between the second main pipe 121 and the liquid outlet main pipe 620.

[0077] In the above-mentioned pipelines, the first main pipe 111, the first liquid discharge pipeline 710, the liquid inlet main pipe 610, the liquid outlet main pipe 620, the second liquid inlet pipeline 740, and the second main pipe 121 constitute a first one-way loop; the second main pipe 121, the second liquid discharge pipeline 730, the liquid inlet main pipe 610, the liquid outlet main pipe 620, the first liquid inlet pipeline 720, and the first main pipe 111 constitute a second one-way loop.

[0078] In addition, it should be noted that a first one-way valve 711 is provided in the first liquid discharge line 710, a second one-way valve 721 is provided in the first liquid inlet line 720, a third one-way valve 731 is provided in the second liquid discharge line 730, and a fourth one-way valve 741 is provided in the second liquid inlet line 740. The one-way valves can control the flow direction of the coolant, ensuring one-way flow of the coolant and preventing coolant backflow.

[0079] Figure 3 Schematic diagram of the coolant circulation path of the steering gear provided in the embodiment of the present application during the left steering action, refer to Figure 3 As shown, during the left turning action, the water in the first cooling cavity 510 will be squeezed out and flow out from the first cooling port 110, and then complete the circulation of the coolant through the first one-way loop.

[0080] Specifically, the water in the first cooling chamber 510 flows out through the first cooling port 110, and sequentially passes through the first manifold 111, the one-way valve 711, the first liquid discharge pipe 710, and the liquid inlet manifold 610 into the liquid supply container 600. At the same time, the water in the liquid supply container 600 flows out from the liquid outlet manifold 620, and sequentially passes through the second liquid inlet pipe 740, the fourth one-way valve 741, and the second manifold 121 into the second cooling chamber 520, thereby completing the coolant circulation during the left turn action.

[0081] Figure 4 This is a schematic diagram of the cooling cycle path of the steering gear provided in the embodiment of the present application during the right steering action. Figure 3 As shown, during the right turning action, the water in the second cooling cavity 520 will be squeezed out and flow out from the second cooling port 120, and then complete the circulation of the coolant through the second one-way loop.

[0082] Specifically, after the water in the second cooling chamber 520 flows out from the second cooling port 120, it flows through the second main pipe 121, the one-way valve 731, the second liquid discharge pipeline 730, and the liquid inlet main pipe 610 in sequence and enters the liquid supply container 600. At the same time, the water in the liquid supply container 600 flows out from the liquid outlet main pipe 620, and then flows through the second one-way pressure reducing valve 721, the first liquid inlet pipeline 720, and the first main pipe 111 in sequence and enters the first cooling chamber 510, thereby completing the coolant circulation of the steering gear during the right steering action.

[0083] It should be noted that the third cooling chamber 530 is smaller than the first cooling chamber 510 and the second cooling chamber 520. When coolant circulates in the first cooling chamber 510 or the second cooling chamber 520, it can also enter the third cooling chamber 530 through the connecting hole 531, thereby cooling the permanent magnet mover 410. This design is due to the high heat generated by the coil winding 320 during operation of the power steering gear 10. Therefore, the larger first cooling chamber 510 and second cooling chamber 520 are provided for the coil winding 320 to ensure greater cooling capacity.

[0084] When a signal is transmitted from the steering wheel, the coil winding 320 will give a variable current according to the algorithm. Different currents will generate different magnetic forces. The magnetic force will drive the permanent magnet mover 410 to move in a straight line and drive the core shaft 200 to move left or right. Therefore, in this process, the permanent magnet mover 410 will also generate heat, but this heat is smaller than the heat generated by the coil winding 320. Therefore, a smaller third cooling cavity 530 is set in the permanent magnet mover 410 part to improve the cooling efficiency.

[0085] The serial numbers of the embodiments of this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this application and do not limit the scope of the patent of this application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. A power steering gear, characterized in that: include: The housing (100) is provided with a first cooling port (110) and a second cooling port (120); A core shaft (200) is disposed in the housing (100) and extends along the axial direction of the housing (100); A stator assembly (300) is arranged on the inner wall surface of the housing (100); A movable assembly (400) is sleeved outside the core shaft (200) and, driven by the stator assembly (300), drives the core shaft (200) to move along the axial direction of the housing (100); A cooling chamber (500) includes a first cooling chamber (510) and a second cooling chamber (520); the first cooling chamber (510) is located between a first end of the movable subassembly (400) and a corresponding end of the housing (100), and the first cooling port (110) is in communication with the first cooling chamber (510); the second cooling chamber (520) is located between a second end of the movable subassembly (400) and a corresponding end of the housing (100), and the second cooling port (120) is in communication with the second cooling chamber (520); The liquid supply container (600) is connected between the first cooling port (110) and the second cooling port (120) via a first one-way loop and a second one-way loop.

2. The power steering device according to claim 1, characterized in that: The cooling chamber (500) further comprises: A third cooling cavity (530) is located between the movable subassembly (400) and the core shaft (200), and is in communication with at least one of the first cooling cavity (510) and the second cooling cavity (520).

3. The power steering device according to claim 2, characterized in that: A connecting hole (531) is provided at one end of the third cooling chamber (530) facing the first cooling chamber (510), or a connecting hole (531) is provided at one end of the third cooling chamber (530) facing the second cooling chamber (520).

4. The power steering device according to any one of claims 1 to 3, characterized in that: The first cooling port (110) is connected to a first main pipe (111), the second cooling port (120) is connected to a second main pipe (121), the liquid inlet of the liquid supply container (600) is connected to a liquid inlet main pipe (610), and the liquid outlet of the liquid supply container (600) is connected to a liquid outlet main pipe (620); A first liquid discharge pipeline (710) is connected between the first main pipe (111) and the liquid inlet main pipe (610), and a first liquid inlet pipeline (720) is connected between the first main pipe (111) and the liquid outlet main pipe (620); a second liquid discharge pipeline (730) is connected between the second main pipe (121) and the liquid inlet main pipe (610), and a second liquid inlet pipeline (740) is connected between the second main pipe (121) and the liquid outlet main pipe (620); The first main pipe (111), the first liquid discharge pipeline (710), the liquid inlet main pipe (610), the liquid outlet main pipe (620), the second liquid inlet pipeline (740), and the second main pipe (121) constitute the first one-way circuit; and the second main pipe (121), the second liquid discharge pipeline (730), the liquid inlet main pipe (610), the liquid outlet main pipe (620), the first liquid inlet pipeline (720), and the first main pipe (111) constitute the second one-way circuit.

5. The power steering device according to claim 4, characterized in that: The first liquid discharge pipeline (710) is provided with a first one-way valve (711), the first liquid inlet pipeline (720) is provided with a second one-way valve (721), the second liquid discharge pipeline (730) is provided with a third one-way valve (731), and the second liquid inlet pipeline (740) is provided with a fourth one-way valve (741).

6. The power steering device according to any one of claims 1 to 3, characterized in that: The stator assembly (300) comprises: A coil support (310) is mounted on the inner wall of the housing (100) and has a plurality of spaced-apart isolation portions; A plurality of coil windings (320), each coil winding (320) being sequentially arranged between adjacent isolation portions.

7. The power steering device according to claim 6, characterized in that: The stator assembly (300) further includes: The coil baffles (330) are arranged at both ends of the coil support (310).

8. The power steering device according to any one of claims 1 to 3, characterized in that: The movable subassembly (400) comprises: A permanent magnet mover (410) is sleeved outside the core shaft (200); The fixing seat (420) is disposed against the outer wall of the core shaft (200) and supported at both ends of the permanent magnet mover (410).

9. The power steering device according to claim 8, characterized in that: The permanent magnet mover (410) comprises: A plurality of permanent magnets (411) are sequentially arranged along the axial direction of the core shaft (200); A retaining frame (412) is spaced between adjacent permanent magnets (411).

10. A vehicle, characterized in that: The invention comprises the power steering device according to any one of claims 1 to 9.

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