Actuating mechanism, steering device and vehicle

Abstract

The utility model discloses an actuating mechanism, a steering device and a vehicle, the actuating mechanism comprises a joint fork, one end of the joint fork is suitable for being connected with a wheel; the lead screw is connected with the other end of the joint fork in a sealed mode. According to the actuating mechanism, through the sealing connection between the joint fork and the screw rod, the sealing performance of the joint fork and the screw rod at the connecting position is effectively improved, pollutants such as water and dust are prevented from entering the actuating mechanism, parts in the actuating mechanism are prevented from rusting and corrosion, and the service life of the actuating mechanism is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle accessory manufacturing, and more specifically, to an actuator, a steering device and a vehicle. Background Art

[0002] In the existing actuator in the steering device, a dust cover is usually used to seal the joint fork and the lead screw. The sealing performance of the dust cover is not good, and it cannot effectively prevent pollutants such as water and dust from entering. Summary of the Utility Model

[0003] An object of the utility model is to provide a new technical solution for an actuator, a steering device and a vehicle, which can at least solve the problem of poor sealing of the dust cover in the existing technology.

[0004] In the first aspect of the utility model, an actuator is provided, including: a joint fork, one end of the joint fork is adapted to be connected to a wheel; a lead screw, the lead screw is hermetically connected to the other end of the joint fork.

[0005] Optionally, the other end of the joint fork is provided with a mounting surface; one end of the lead screw close to the joint fork is provided with a mating surface, the joint fork is connected to the lead screw, and is sealed by the cooperation of the mounting surface and the mating surface.

[0006] Optionally, the mounting surface includes: a first mounting surface, a second mounting surface and a third mounting surface, the mating surface includes: a first mating surface, a second mating surface and a third mating surface, and the first mounting surface, the second mounting surface and the third mounting surface respectively cooperate with the first mating surface, the second mating surface and the third mating surface one by one to form a seal.

[0007] Optionally, the first mounting surface, the second mounting surface and the third mounting surface form a stepped assembly surface at the other end of the joint fork.

[0008] Optionally, the first mounting surface abuts against the first mating surface, the second mounting surface abuts against the second mating surface, and the third mounting surface and the third mating surface are spaced apart to form an assembly area.

[0009] Optionally, a sealing member is provided in the assembly area.

[0010] Optionally, the sealing member is a rectangular sealing ring.

[0011] Optionally, gaskets are provided at the mating positions of the first mounting surface and the first mating surface of the joint fork and the lead screw.

[0012] Optionally, the upper end surface of the first mounting surface is flush with the upper end surface of the first mating surface, and the gasket is disposed on the upper end surface of the first mounting surface and the upper end surface of the first mating surface to seal the mating gap between the first mounting surface and the first mating surface.

[0013] Optionally, the actuator further includes: a housing having a receiving cavity therein, the lead screw being disposed in the receiving cavity, and one end of the lead screw extending out of the housing and sealingly connected to the joint fork, and the lead screw being axially movable along its axis.

[0014] Optionally, a first recess is provided on the outer wall surface of the housing, the joint fork and the housing are disposed opposite to each other at an interval in the axial direction of the joint fork, and a second recess is provided on the outer wall surface of the joint fork.

[0015] Optionally, the actuator further includes: a dust cover, both ends of the dust cover are respectively disposed in the first recess and the second recess, and the housing and the joint fork respectively axially limit the dust cover through the first recess and the second recess.

[0016] Optionally, the first recess is recessed toward the receiving cavity of the housing, and the second recess is recessed toward the inner cavity of the joint fork.

[0017] Optionally, clamping rings are respectively provided at both ends of the dust cover to fix the dust cover and the housing and the dust cover and the joint fork.

[0018] Optionally, an internal thread is provided on the inner surface of the lead screw, the lead screw and the joint fork are connected by bolts, and the internal thread is engaged with the external thread of the bolts.

[0019] In a second aspect of the present invention, a steering device is provided, including the actuator described in the above embodiment.

[0020] In a third aspect of the present invention, a vehicle is provided, including the steering device described in the above embodiment.

[0021] The actuator of the present invention effectively improves the sealing performance at the connection position between the joint fork and the lead screw through the sealing connection, prevents pollutants such as water and dust from entering the actuator, avoids rust and corrosion of the internal components of the actuator, and improves the service life of the actuator.

[0022] Other features and advantages of the present invention will become clear through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings incorporated in and forming a part of the specification illustrate embodiments of the present utility model and, together with the description thereof, are used to explain the principles of the present utility model.

[0024] Figure 1 is a sectional view of an actuator according to an embodiment of the present utility model;

[0025] Figure 2 is a schematic structural view of a seal according to an embodiment of the present utility model;

[0026] Figure 3 is a sectional view of a seal according to an embodiment of the present utility model;

[0027] Figure 4 is a sectional view of a steering device according to an embodiment of the present utility model.

[0028] Reference numerals:

[0029] Actuator 100;

[0030] Housing 10; First recess 11;

[0031] Knuckle 20; Second recess 21; First mounting surface 22; Second mounting surface 23; Assembly area 24;

[0032] Dust cover 30;

[0033] Clamp 40;

[0034] Lead screw 50; Internal thread 51;

[0035] Sliding bearing 60;

[0036] Seal 71; Bolt 72; Gasket 73;

[0037] Motor controller assembly 81; Synchronous belt drive mechanism 82. Detailed embodiments

[0038] Now, various exemplary embodiments of the present utility model will be described in detail with reference to the drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way limits the present utility model, its application, or its use.

[0040] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be considered as part of the specification.

[0041] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0042] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0043] In the description and claims of the present utility model, features related to the terms "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the related objects before and after.

[0044] In the description of the present utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0045] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] The actuator 100 according to an embodiment of the present utility model will be specifically described below with reference to the drawings.

[0047] As Figure 1As shown, the actuator 100 according to an embodiment of the present invention mainly consists of a joint fork 20 and a lead screw 50. One end of the joint fork 20 is adapted to be connected to a wheel. The lead screw 50 is hermetically connected to the other end of the joint fork 20, effectively improving the sealing performance at the connection position between the joint fork 20 and the lead screw 50, preventing pollutants such as water and dust from entering the actuator 100, avoiding rust and corrosion of the internal components of the actuator 100, and extending the service life of the actuator 100.

[0048] According to an embodiment of the present invention, as Figure 1 shown, the other end of the joint fork 20 is provided with a mounting surface, and one end of the lead screw 50 close to the joint fork 20 is provided with a mating surface. After the joint fork 20 and the lead screw 50 are assembled and connected, the sealing between the joint fork 20 and the lead screw 50 can be achieved through the cooperation of the mounting surface and the mating surface, effectively improving the sealing performance at the connection position between the joint fork 20 and the lead screw 50, preventing pollutants such as water and dust from entering the actuator 100, avoiding rust and corrosion of the internal components of the actuator 100, and extending the service life of the actuator 100.

[0049] According to an embodiment of the present invention, the mounting surface includes: a first mounting surface 22, a second mounting surface 23, and a third mounting surface. The mating surface includes: a first mating surface, a second mating surface, and a third mating surface. The first mounting surface 22, the second mounting surface 23, and the third mounting surface are respectively in one-to-one cooperation with the first mating surface, the second mating surface, and the third mating surface to form a seal.

[0050] That is to say, referring to Figure 1 , the mounting surface mainly consists of a first mounting surface 22, a second mounting surface 23, and a third mounting surface. The mating surface mainly consists of a first mating surface, a second mating surface, and a third mating surface. One end of the joint fork 20 close to the lead screw 50 is respectively provided with a first mounting surface 22, a second mounting surface 23, and a third mounting surface. The lead screw 50 is provided with a first mating surface, a second mating surface, and a third mating surface respectively corresponding to the first mounting surface 22, the second mounting surface 23, and the third mounting surface. The first mounting surface 22, the second mounting surface 23, and the third mounting surface can be respectively in one-to-one cooperation with the first mating surface, the second mating surface, and the third mating surface to form a seal, which can prevent pollutants such as water and dust from entering the inside of the actuator 100, play a certain protective role for it, and prevent unstable transmission caused by rust, or even the detachment of the joint fork 20.

[0051] According to an embodiment of the present invention, as Figure 1As shown, the first mounting surface 22, the second mounting surface 23 and the third mounting surface form a stepped mounting surface at the other end of the joint fork 20. In other words, the first mounting surface 22, the second mounting surface 23 and the third mounting surface are arranged in a stepped shape on the lead screw 50. When the dust cover 30 is damaged, the stepped mating structure can prevent pollutants such as water and dust from entering the interior of the actuator 100, play a certain protective role for it, and prevent unstable transmission caused by rust, or even the joint fork 20 from falling off.

[0052] According to an embodiment of the present invention, as Figure 1 shown, the first mounting surface 22 and the first mating surface can be abutted to form a seal, and the second mounting surface 23 and the second mating surface can be abutted to form a seal, effectively preventing pollutants such as water and dust from entering the interior of the actuator 100, playing a certain protective role for it, and preventing unstable transmission caused by rust, or even the joint fork 20 from falling off. The third mounting surface and the third mating surface are spaced apart to form an assembly area 24. The assembly area 24 can be relatively stationary when the rear-wheel steering device is working. After water, dust and other pollutants enter through the stepped assembly structure, the seal 71 can prevent them from entering the interior through the assembly area 24, further improving the sealing protection effect on the lead screw 50.

[0053] According to an embodiment of the present invention, as Figures 1 to 3 shown, a seal 71 can be arranged in the assembly area 24. By arranging the seal 71 in the assembly area 24, the sealing performance between the joint fork 20 and the lead screw 50 can be further improved, preventing pollutants such as water and dust from entering the actuator 100, avoiding rust and corrosion of the internal components of the actuator 100, and prolonging the service life of the actuator 100.

[0054] According to an embodiment of the present invention, as Figure 2 and Figure 3 shown, the seal 71 can adopt a rectangular sealing ring. Its structure is as simple as that of an O-ring, and the materials are both rubber, but its cross-section is a rectangular profile. The sealing performance is generated by the contact pressure applied during installation. Compared with the O-ring, the deformation amount after installation is smaller, the dimensional stability is good, and the contact pressure is uniform. The rubber sealing ring will undergo natural aging and reduced elasticity under the condition of too large compression ratio, resulting in reduced sealing performance or even failure. Under the same working conditions, the rectangular sealing ring has a smaller compression amount than the O-ring, and provides a large enough sealing force under a very small compression amount, and the aging speed is slow. Due to the large contact area of the rectangular sealing ring, the heat generated during the movement process is difficult to dissipate, so it can only be applied to static sealing occasions and is suitable for the sealing of the lead screw 50 and the joint fork 20 here.

[0055] In the present invention, as Figure 1As shown, the first mounting surface 22 abuts against the first mating surface, and the second mounting surface 23 abuts against the second mating surface. The third mounting surface and the third mating surface are spaced apart to form an assembly area 24. Based on the arrangement of the three assembly structures, a seal 71 can be provided in the assembly area 24 (see Figures 1 to 3 ). Among them, the annular assembly surfaces (the first mounting surface 22, the second mounting surface 23, the first assembly surface and the second assembly surface) are used for the axial and radial positioning of the lead screw 50 and the joint fork 20, providing a sealing force, so that the sealing joint is pressed against the end faces of the lead screw 50 and the joint fork 20 with a certain interference amount, eliminating the assembly gap, forming a sealing force, and generating a sealing performance. The annular assembly area 24 is relatively stationary when the rear-wheel steering device is working. After water, dust and other pollutants enter through the stepped assembly structure, the seal 71 can prevent them from entering the interior through the assembly area 24, further improving the sealing protection effect on the lead screw 50.

[0056] According to an embodiment of the present invention, as Figure 1 shown, a gasket 73 is provided at the mating position of the joint fork 20 and the lead screw 50 at the first mounting surface 22 and the first mating surface. The gasket 73 is a redundant design for protecting the end of the retraction stroke of the lead screw 50. The outer peripheral surface of the lead screw 50 has the same radius as the outer peripheral surface of the joint fork 20. The radially inner surface of the gasket 73 is simultaneously mated with the outer peripheral surface of the lead screw 50 and the outer peripheral surface of the joint fork 20. One end face of the gasket 73 is adhesively connected to the end face of the joint fork 20. At the same time, the radially inner surface of the gasket 73 shields the gap between the mating surfaces of the joint fork 20 and the lead screw 50, playing a certain sealing and protecting role.

[0057] According to an embodiment of the present invention, as Figure 1 shown, the upper end face of the first mounting surface 22 is flush with the upper end face of the first mating surface. The gasket 73 is simultaneously provided on the upper end face of the first mounting surface 22 and the upper end face of the first mating surface, so as to seal the mating gap between the first mounting surface 22 and the first mating surface. The gasket 73 is a redundant design for protecting the end of the retraction stroke of the lead screw 50. The outer peripheral surface of the lead screw 50 has the same radius as the outer peripheral surface of the joint fork 20. The radially inner surface of the gasket 73 is simultaneously mated with the outer peripheral surface of the lead screw 50 and the outer peripheral surface of the joint fork 20. One end face of the gasket 73 is adhesively connected to the end face of the joint fork 20. At the same time, the radially inner surface of the gasket 73 shields the gap between the mating surfaces of the joint fork 20 and the lead screw 50, playing a certain sealing and protecting role.

[0058] According to an embodiment of the present invention, see Figure 1 , the actuator 100 further includes a housing 10. A receiving cavity is provided in the housing 10. The lead screw 50 can be installed in the receiving cavity, and one end of the lead screw 50 can extend out of the housing 10 to be hermetically connected to the joint fork 20. The lead screw 50 can move along its axial direction to meet the movement requirements of the lead screw 50.

[0059] According to an embodiment of the present utility model, as Figure 1 shown, a first recess 11 is provided on the outer wall surface of the housing 10. The joint fork 20 and the housing 10 are disposed opposite to each other with a space therebetween in the axial direction of the joint fork 20. A second recess 21 is provided on the outer wall surface of the joint fork 20, facilitating the connection and arrangement of other structural members between the joint fork 20 and the housing 10.

[0060] According to an embodiment of the present utility model, as Figure 1 shown, the actuator 100 further includes a dust cover 30. Two ends of the dust cover 30 are respectively disposed in the first recess 11 and the second recess 21. The housing 10 and the joint fork 20 can respectively axially limit the dust cover 30 through the first recess 11 and the second recess 21.

[0061] That is to say, the first recess 11 is provided on the outer wall surface of the housing 10 near its end portion. The joint fork 20 and the housing 10 are disposed opposite to each other with a space therebetween. The second recess 21 is provided on the outer wall surface of the joint fork 20. Two ends of the dust cover 30 are respectively fixed in the first recess 11 and the second recess 21. The housing 10 and the joint fork 20 can respectively axially limit the dust cover 30 through the first recess 11 and the second recess 21 on the housing 10 and the joint fork 20, preventing the dust cover 30 from axially sliding, improving the stability of the assembly of the dust cover 30 with the housing 10 and the joint fork 20, having high reliability, avoiding the loosening of the dust cover 30, thereby effectively preventing pollutants such as water and dust from entering the interior of the actuator 100 and avoiding the rusting and corrosion of its internal components.

[0062] As Figure 1 shown, the lead screw 50 is installed in the housing 10, and one end of the lead screw 50 extends out of the housing 10 and is assembled and connected with the joint fork 20. The lead screw 50 can move axially. During the displacement of the lead screw 50, the dust cover 30 can be stretched and contracted along with the change of the length of the extending end, preventing pollutants such as water and dust from entering the interior of the actuator 100.

[0063] Therefore, for the actuator 100 of the present utility model, one end of the joint fork 20 is adapted to be connected with a wheel. The lead screw 50 is hermetically connected with the other end of the joint fork 20, effectively improving the sealing performance at the connection position between the joint fork 20 and the lead screw 50, preventing pollutants such as water and dust from entering the actuator 100, avoiding the rusting and corrosion of the internal components of the actuator 100, and enhancing the service life of the actuator 100. And by providing the first recess 11 on the outer wall surface of the housing 10 and the second recess 21 on the outer wall surface of the joint fork 20, and installing two ends of the dust cover 30 in the first recess 11 and the second recess 21 respectively, axial limitation of the dust cover 30 is achieved, preventing the dust cover 30 from axially sliding, improving the stability of the assembly of the dust cover 30 with the housing 10 and the joint fork 20, avoiding the loosening of the dust cover 30, thereby effectively preventing pollutants such as water and dust from entering the interior of the actuator 100 and avoiding the rusting and corrosion of its internal components.

[0064] According to an embodiment of the present utility model, the first recess 11 is recessed towards the accommodation cavity of the housing 10, and the second recess 21 is recessed towards the inner cavity of the joint fork 20.

[0065] That is to say, as Figure 1 shown, the first recess 11 and the second recess 21 can be respectively processed into wide grooves. Among them, the first recess 11 is recessed towards the accommodation cavity of the housing 10, and the second recess 21 is recessed towards the inner cavity of the joint fork 20, which is convenient for the fixed assembly of the dust cover 30 with the housing 10 and the joint fork 20, improves the stability of the assembly of the dust cover 30 with the housing 10 and the joint fork 20, avoids loosening of the dust cover 30, and thus effectively prevents pollutants such as water and dust from entering the inside of the actuator 100 and avoids rusting and corrosion of its internal components.

[0066] Certainly, for the sealing structure between the dust cover 30, the housing 10 and the joint fork 20, the present utility model processes two annular narrow grooves on the outer peripheral surfaces of the joint fork 20 and the housing 10 respectively instead of the wide groove design, and correspondingly modifies the end features at both ends of the dust cover 30 to reduce the processing cost.

[0067] According to an embodiment of the present utility model, clamping rings 40 are respectively provided at both ends of the dust cover 30 to fix the dust cover 30 and the housing 10 as well as the dust cover 30 and the joint fork 20.

[0068] In other words, as Figure 1 shown, clamping rings 40 are also respectively provided at both ends of the dust cover 30. Through the clamping rings 40, the dust cover 30 and the housing 10 as well as the dust cover 30 and the joint fork 20 can be further fixed. In the present utility model, the dust cover 30 is arranged on the housing 10 and the joint fork 20. Annular wide grooves (the first recess 11 and the second recess 21) with a certain depth are respectively processed on the outer peripheral surfaces of the housing 10 and the joint fork 20. The end features at both ends of the dust cover 30 cooperate with the two annular wide grooves. The two sides of the surface of the annular wide groove are slightly higher, realizing axial limit to prevent the axial sliding of the dust cover 30, and it is clamped and fixed with a clamping ring 40 above to achieve a certain amount of interference fit. The connection method is simple and not easy to fall off after installation, with high reliability, preventing pollutants such as water and dust from entering the rear wheel steering device.

[0069] According to an embodiment of the present utility model, as Figure 1 shown, a sliding bearing 60 is arranged between the lead screw 50 and the housing 10. The lead screw 50 does not rotate around its own axis and only makes axial horizontal movement. The lead screw 50 and the sliding bearing 60 as well as the sliding bearing 60 and the housing 10 are all in interference fit, and the end face of the sliding bearing 60 is flush with the end face of the housing 10. The sliding bearing 60 plays a guiding and supporting role for the lead screw 50.

[0070] According to an embodiment of the present utility model, an internal thread 51 is provided on the inner surface of the lead screw 50. The lead screw 50 and the joint fork 20 are connected by bolts 72, and the internal thread 51 is engaged with the external thread of the bolts 72.

[0071] In other words, as Figure 1 shown, an internal thread 51 is provided on the inner surface of the lead screw 50. The lead screw 50 and the joint fork 20 can be connected by bolts 72, and the internal thread 51 is engaged with the external thread of the bolts 72. The internal cavity of the lead screw 50 is machined with the internal thread 51 and is connected by bolts 72. The end of the lead screw 50 and the end of the joint fork 20 are designed with two annular assembly surfaces (the first mounting surface 22, the second mounting surface 23, the first assembly surface and the second assembly surface) and an assembly area 24 in the radial and axial directions. The three assembly structures are in a stepped shape. After the dust cover 30 is damaged, it can prevent pollutants such as water and dust from entering the threaded assembly surface, play a certain protective role for the connection of the internal thread 51 of the lead screw 50 and the bolts 72, and prevent the transmission instability caused by the rust of the bolts 72 and even the detachment of the joint fork 20.

[0072] As Figures 1 to 3 shown, based on the design of three assembly surfaces, an O-ring (sealing member 71) is provided at the axial annular assembly area 24 of the actuator 100 of the present utility model. The assembly area 24 is relatively stationary when the rear-wheel steering device is working, and the O-ring used for static sealing is selected here. During assembly, the two annular assembly surfaces are used for the axial and radial positioning of the lead screw 50 and the joint fork 20. With the sealing force provided by the bolts 72, the O-ring is pressed against the end face of the lead screw 50 and the end face of the joint fork 20 and a certain interference amount is embedded to eliminate the assembly gap, form a sealing force, and generate a sealing performance. After water, dust and other pollutants enter through the assembly surface, the O-ring can prevent them from entering the threaded part through the assembly area 24, further improving the sealing protection effect on the inside of the thread.

[0073] All in all, for the actuator 100 of the present utility model, one end of the joint fork 20 is adapted to be connected to the wheel. The lead screw 50 and the other end of the joint fork 20 are hermetically connected, effectively improving the sealing performance at the connection position of the joint fork 20 and the lead screw 50, preventing pollutants such as water and dust from entering the actuator 100, avoiding the rust and corrosion of the internal components of the actuator 100, and extending the service life of the actuator 100. And by providing a first recess 11 on the outer wall surface of the housing 10 and a second recess 21 on the outer wall surface of the joint fork 20, both ends of the dust cover 30 are respectively installed in the first recess 11 and the second recess 21 to realize the axial limit of the dust cover 30, prevent the axial sliding of the dust cover 30, improve the stability of the assembly of the dust cover 30 with the housing 10 and the joint fork 20, avoid the loosening of the dust cover 30, and thus effectively prevent pollutants such as water and dust from entering the inside of the actuator 100 and avoid the rust and corrosion of its internal components.

[0074] Meanwhile, the first mounting surface 22, the second mounting surface 23, and the third mounting surface are arranged in a stepped shape on the lead screw 50. When the dust cover 30 is damaged, the stepped mating structure can prevent pollutants such as water and dust from entering the interior of the actuator 100, playing a certain protective role, preventing transmission instability caused by rust, and even preventing the joint fork 20 from falling off. And the rectangular sealing ring plays a good sealing and protective role for the joint fork 20, the internal thread 51 of the lead screw 50, and the external thread of the bolt 72. The radially inner surface of the gasket 73 shields the gap between the mating surfaces of the joint fork 20 and the lead screw 50, playing a certain sealing and protective role.

[0075] For the actuator 100 of the present utility model, through reasonable structural design, it has better sealing performance and stronger applicability, and can meet higher requirements for water sealing, dust sealing, etc.

[0076] Of course, for those skilled in the art, other structures and working principles of the actuator 100 can be understood and implemented, and will not be elaborated in detail in the present utility model.

[0077] According to the second aspect of the present utility model, a steering device is provided, including the actuator 100 in the above-mentioned embodiment. As Figure 1 and Figure 4 shown, the steering device mainly consists of a motor controller assembly 81, a synchronous belt drive mechanism 82, and an actuator 100, etc. By adopting the actuator 100 of the above-mentioned embodiment, the steering device has a suitable structure and good practicability, and effectively prevents the reduction of component performance and damage caused by rust inside the steering device due to pollutants such as water and dust. This sealing structure still provides a certain sealing and protective effect when the dust cover 30 is damaged, so as to meet the sealing requirements under bad working conditions and ensure the performance and durability life of the steering device.

[0078] Referring to Figure 4 , the steering device can be a split rear-wheel steering device, including a motor controller assembly 81, a synchronous belt drive mechanism 82, and an actuator 100, etc. The synchronous belt drive mechanism 82 is connected to the lead screw nut of the lead screw 50 nut mating mechanism. One end of a control arm of the suspension is connected to the joint fork 20 through a bushing and an eccentric bolt 72, and the other end is connected to the steering knuckle. The axial and radial movements of the lead screw nut are restricted by a fixing device, and the radial movement and rotational movement of the lead screw 50 are restricted. Only the lead screw nut is allowed to rotate at the assembly position, and only the lead screw 50 is allowed to perform axial movement. Thus, the rear-wheel steering device can convert the rotational movement of the motor into a linear movement of the lead screw 50 along the axial direction, driving the control arm to achieve rear-wheel steering.

[0079] Therefore, for the steering device of the present utility model, by adopting the actuator 100 of the above embodiment, the sealing performance is better, the applicability is stronger, and it can meet higher requirements for water sealing, dust sealing, etc.

[0080] Of course, for those skilled in the art, other structures and working principles of the steering device can be understood and realized, and will not be elaborated in detail in the present utility model.

[0081] According to the third aspect of the present utility model, a vehicle is provided, including the steering device of the above embodiment. Since the steering device according to the embodiment of the present utility model has the above technical effects, therefore, the vehicle according to the embodiment of the present utility model should also have corresponding technical effects, that is, the vehicle of the present utility model by adopting this steering device has better sealing performance, stronger applicability, and can meet higher requirements for water sealing, dust sealing, etc.

[0082] Of course, for those skilled in the art, other structures and working principles of the vehicle can be understood and realized, and will not be elaborated in detail in the present utility model.

[0083] Although some specific embodiments of the present utility model have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present utility model. The scope of the present utility model is defined by the appended claims.

Claims

1. An actuator (100), characterized in that: include: A yoke (20), one end of which is suitable for connecting to a wheel; A screw rod (50) is sealedly connected to the other end of the yoke (20).

2. The actuator (100) according to claim 1, characterized in that: The other end of the yoke (20) is provided with a mounting surface, and the end of the screw rod (50) close to the yoke (20) is provided with a matching surface. The yoke (20) is connected to the screw rod (50), and sealing is achieved by the matching of the mounting surface and the matching surface.

3. The actuator (100) according to claim 2, characterized in that: The mounting surface comprises: a first mounting surface (22), a second mounting surface (23) and a third mounting surface; the mating surface comprises: a first mating surface, a second mating surface and a third mating surface; the first mounting surface (22), the second mounting surface (23) and the third mounting surface respectively mating with the first mating surface, the second mating surface and the third mating surface one by one to form a seal.

4. The actuator (100) according to claim 3, characterized in that: The first mounting surface (22), the second mounting surface (23) and the third mounting surface form a stepped assembly surface at the other end of the yoke (20).

5. The actuator (100) according to claim 3, characterized in that: The first mounting surface (22) abuts against the first matching surface, the second mounting surface (23) abuts against the second matching surface, and the third mounting surface and the third matching surface are spaced apart to form an assembly area (24).

6. The actuator (100) according to claim 5, characterized in that: A sealing member (71) is provided in the assembly area (24).

7. The actuator (100) according to claim 6, characterized in that: The sealing member (71) is a rectangular sealing ring.

8. The actuator (100) according to claim 3, characterized in that: The yoke (20) and the screw rod (50) are provided with a gasket (73) at the matching position between the first mounting surface (22) and the first matching surface.

9. The actuator (100) according to claim 8, characterized in that: The upper end surface of the first mounting surface (22) is flush with the upper end surface of the first matching surface, and the gasket (73) is arranged on the upper end surface of the first mounting surface (22) and the upper end surface of the first matching surface at the same time to seal the matching gap between the first mounting surface (22) and the first matching surface.

10. The actuator (100) according to claim 1, characterized in that: Also includes: A housing (10) is provided with a housing cavity, the screw rod (50) is arranged in the housing cavity, one end of the screw rod (50) extends out of the housing (10) and is sealedly connected to the yoke (20), and the screw rod (50) is movable along its axial direction.

11. The actuator (100) according to claim 10, characterized in that: A first recess (11) is provided on the outer wall surface of the housing (10); the yoke (20) and the housing (10) are spaced apart and arranged opposite to each other in the axial direction of the yoke (20); and a second recess (21) is provided on the outer wall surface of the yoke (20).

12. The actuator (100) according to claim 11, characterized in that: Also includes: A dust cover (30), wherein two ends of the dust cover (30) are respectively arranged in the first recess (11) and the second recess (21), and the housing (10) and the yoke (20) respectively limit the axial position of the dust cover (30) through the first recess (11) and the second recess (21).

13. The actuator (100) according to claim 11, characterized in that: The first recess (11) is recessed toward the accommodating cavity of the housing (10), and the second recess (21) is recessed toward the inner cavity of the yoke (20).

14. The actuator (100) according to claim 12, characterized in that: Clamps (40) are respectively provided at both ends of the dust cover (30) to fix the dust cover (30) and the housing (10) as well as the dust cover (30) and the yoke (20).

15. The actuator (100) according to claim 1, characterized in that: The inner surface of the screw rod (50) is provided with an internal thread (51), the screw rod (50) and the yoke (20) are connected by a bolt (72), and the internal thread (51) cooperates with the external thread of the bolt (72).

16. A steering device, characterized in that: The invention comprises the actuator (100) according to any one of claims 1 to 15.

17. A vehicle, characterized in that: Includes the steering device as claimed in claim 16.

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