Split type steering gear, steering system and vehicle

Abstract

The utility model discloses a split type steering gear, steering system and vehicle, the split type steering gear comprises a shaft body, a sensor installation shell and a steering gear main shell, the shaft body is suitable for being installed on the sensor installation shell, the sensor installation shell is detachably connected with the steering gear main shell. According to the split type steering gear, the steering system and the vehicle, the shaft body is installed on the sensor installation shell, and then the sensor installation shell is detachably connected with the steering gear main shell. Other assemblies such as a shaft body can be integrated on the sensor mounting shell and then assembled and connected with the steering gear main shell, the mold development difficulty of the steering gear main shell can be reduced to a great extent, the development cost is reduced, and platformization and light weight of products are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of steering gears, in particular to a split steering gear, a steering system and a vehicle. Background Art

[0002] The vehicle steering gear usually needs to be connected to the steering wheel through an internal mechanical structure to transmit the torque from the steering wheel end, and then transmit it to the rack at the actuator end through the internal energy conversion of these mechanical mechanisms to achieve the corresponding positive excitation from the steering wheel, thereby realizing the steering function and pushing the wheel to swing left and right.

[0003] However, the current assembly scheme for the mechanical structure inside the steering gear adopts a method of assembling the parts in sequence, which leads to an increase in the number of assembly steps on the production line and increased costs. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] The utility model provides a split-type steering gear, characterized in that it comprises: a sensor installation shell and a steering gear main shell, the shaft body is suitable for being installed on the sensor installation shell, and the sensor installation shell is detachably connected to the steering gear main shell.

[0006] Exemplarily, the split-type steering gear further includes a mounting bearing, and the mounting bearing is arranged between the shaft body and the sensor mounting housing.

[0007] Exemplarily, the split-type steering gear further includes a limiting mechanism for axially limiting and fixing the mounting bearing on the sensor mounting housing.

[0008] Exemplarily, the limiting mechanism includes a retaining spring and an axial limiting ring, and the retaining spring and the axial limiting ring are suitable for being installed on the mounting bearing; wherein the mounting bearing is fixed on the outer ring by the retaining spring, and / or the mounting bearing is fixed on the inner ring by the axial limiting ring.

[0009] Exemplarily, the sensor mounting housing is detachably connected to the steering gear main housing via a threaded connection.

[0010] Exemplarily, the sensor mounting housing includes a housing body and a sensor cover, wherein the sensor cover is detachably connected to the housing body.

[0011] Exemplarily, the sensor cover and the housing body are both provided with connecting through holes, the steering gear main housing is provided with threaded holes, and the connecting piece passes through the connecting through holes and is threadedly connected to the threaded holes.

[0012] Exemplarily, the split-type steering gear further includes a sensor assembly, wherein the sensor assembly is mounted on the sensor mounting housing, and the sensor assembly is located within the sensor mounting housing.

[0013] Exemplarily, the shaft body includes an input shaft, a torsion rod and a gear shaft, the input shaft and the gear shaft are fixedly connected via the torsion rod, the input shaft is suitable for passing through the mounting housing to be transmission-connected to the steering wheel, and the gear shaft extends into the steering gear main housing.

[0014] Exemplarily, two ends of the torsion bar are press-fitted onto the input shaft and the gear shaft, respectively.

[0015] Exemplarily, a first bearing is also included, and the first bearing is connected to the gear shaft support.

[0016] Exemplarily, the first bearing is one of a ball bearing and a needle bearing.

[0017] The utility model also provides a steering system, comprising any of the above-mentioned split steering gears.

[0018] The utility model also provides a vehicle, comprising any one of the above-mentioned split steering gears or the above-mentioned steering system.

[0019] According to the split steering gear, steering system and vehicle provided by the utility model, by installing the shaft body on the sensor mounting shell and then making the sensor mounting shell detachably connected to the steering gear main shell, it is possible to first integrate other components such as the shaft body on the sensor mounting shell and then assemble and connect them with the steering gear main shell, which can greatly reduce the difficulty of mold development of the steering gear main shell, reduce development costs, and realize platformization and lightweight of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings of the present invention are used as a part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principle of the present invention.

[0021] In the attached figure:

[0022] Figure 1 It is a structural schematic diagram of a split-type steering gear according to an embodiment of the utility model;

[0023] Figure 2 It is a cross-sectional schematic diagram of a split-type steering gear according to an embodiment of the utility model.

[0024] Reference numerals

[0025] 1. Shell body 1.2. Sensor harness

[0026] 2. Sensor cover 2.1. Input shaft

[0027] 2.2. Torsion rod 2.3. Cylindrical pin

[0028] 2.4, O-ring 2.5, support sleeve

[0029] 2.6. Sensor assembly 2.8. First sealing ring

[0030] 2.9. Install the bearing 2.10. Second sealing ring

[0031] 2.11. Circlip 2.12. Axial limit ring

[0032] 2.13 Gear shaft

[0033] 3. Steering gear main housing 3.2. Steering rack

[0034] 3.3. Rack support series components 3.4. First bearing DETAILED DESCRIPTION

[0035] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0036] In order to thoroughly understand the present invention, a detailed description will be provided in the following description to illustrate a split-type steering gear and a vehicle of the present invention. Obviously, the implementation of the present invention is not limited to the specific details familiar to those skilled in the art of steering gear technology. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0038] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present utility model thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions is exaggerated, and the same reference numerals are used to represent the same elements, and thus their description will be omitted.

[0039] At present, the assembly scheme of the mechanical structure inside the steering gear adopts the method of assembling the parts in sequence. Whenever the vehicle model is modified, the steering gear must be adjusted to match the whole vehicle. In order to match the adjustment of the installation point of the whole vehicle, the main housing of the steering gear often needs to be adjusted. The platformization process of the main housing of the steering gear is relatively difficult to achieve. The main reason is that its structure is complex and needs to be adjusted with different vehicle models. It is difficult to open the mold, and the cost and weight of individual parts are high. Every time a steering gear is developed, it is easy to cause waste in development cycle and development cost. Therefore, it is necessary to realize the platformization of the steering gear.

[0040] In view of the above problems, the utility model provides a split-type steering gear, such as Figure 1 As shown, it includes: a shaft body, a sensor mounting housing and a steering gear main housing 3, the shaft body is suitable for being mounted on the sensor mounting housing, and the sensor mounting housing is detachably connected to the steering gear main housing 3.

[0041] By first fixedly connecting the shaft body to the sensor mounting housing and then detachably connecting the sensor mounting housing to the steering gear main housing, the fixed connection between the shaft body and the steering gear main housing is avoided during the assembly process of the split steering gear. Compared with the prior art of welding the gear shaft at the end of the shaft body to the deep groove bearing inside the steering gear main housing, this is conducive to platformizing the steering gear main housing.

[0042] In one embodiment, the sensor mounting housing and the steering gear main housing 3 are made of metal materials. The preparation method of the sensor mounting housing and the steering gear main housing 3 includes a die-casting process. Die-casting is a precision casting method that uses high pressure to force molten metal into a metal mold with a complex shape. Its characteristic is that high pressure is applied to the molten metal in the mold cavity. Most die-cast castings are iron-free, such as zinc, copper, aluminum, magnesium, lead, tin, lead-tin alloys and their alloys. The mold is usually made of a higher strength alloy. Specifically, the sensor mounting housing and the steering gear main housing 3 are made of die-cast aluminum alloy.

[0043] Furthermore, the sensor mounting housing includes a housing body 1 and a sensor cover 2, and the sensor cover 2 is detachably connected to the housing body 1. In one embodiment, the sensor cover 2 is generally made of a plastic material, and the preparation method of the sensor cover 2 includes an injection molding process, which refers to a process of making a semi-finished product of a certain shape by pressurizing, injecting, cooling, and separating molten raw materials. In addition, the sensor cover 2 can also use the same material and preparation process as the sensor mounting housing and the steering gear main housing 3, and the present application does not limit this.

[0044] Exemplarily, the sensor mounting housing is detachably connected to the steering gear main housing 3 and the sensor cover 2 is detachably connected to the sensor mounting housing, including: the sensor mounting housing is detachably connected to the steering gear main housing 3 by threaded connection.

[0045] In one embodiment, the threaded connection includes a connection through matching bolts and threaded holes. The threaded hole is provided in the steering gear main housing 3, the connecting piece passes through the connecting through hole and is threadedly connected to the threaded hole, and the sensor cover 2 and the housing body 1 are only provided with connecting through holes for the bolts to pass through, so that the connecting through holes of the sensor cover 2, the connecting through holes of the sensor mounting housing, and the threaded holes of the steering gear main housing 3 are aligned, and the sensor cover 2, the sensor mounting housing, and the steering gear main housing 3 can be detachably connected at the same time by bolts matching the threaded holes.

[0046] It should be noted that the threaded connection using bolts and threaded holes is only exemplary. Threaded connection methods such as bolt-nut connection, stud connection, screw connection, etc. can also be used. Other detachable connection methods such as pin connection, snap connection, key connection, etc. can also be used. This application does not impose any restrictions on this.

[0047] In one embodiment, Figure 2 As shown, the sensor cover 2 is connected to the sensor mounting housing to form a sealed space. Specifically, when the sensor cover 2 and the sensor mounting housing are detachably connected via bolts, a first sealing ring 2.8 is also provided between the sensor cover 2 and the sensor mounting housing. The sensor cover 2 and the sensor mounting housing are end-face sealed by the first sealing ring 2.8, which can also be replaced by a radial seal. The sealing ring includes but is not limited to an O-ring, which is a ring-shaped mechanical gasket. It is an annular elastomer with a circular cross-section and is generally fixed in a groove. It will be compressed by two or more components during the assembly process, thereby producing a sealed interface.

[0048] In one embodiment, Figure 2As shown, the sensor installation housing is sealed and connected to the steering gear main housing 3. Specifically, when the sensor installation housing and the steering gear main housing 3 are detachably connected via bolts, a second sealing ring 2.10 is also provided between the sensor installation housing and the steering gear main housing 3. The sensor installation housing and the steering gear main housing 3 are sealed at the end face by the second sealing ring 2.10, which can also be replaced by a radial seal. The sealing ring includes but is not limited to an O-ring.

[0049] In one embodiment, Figure 2 As shown, other components, such as the sensor wiring harness 1.2, etc., may be integrated on the sensor cover 2. Before the sensor cover 2 is detachably connected to the sensor mounting housing, or before the sensor cover 2, the sensor mounting housing and the steering gear main housing 3 are detachably connected, the sensor wiring harness 1.2 and other components are pre-integrated into the sensor cover 2 to form a sensor cover assembly.

[0050] In one embodiment, Figure 2 As shown, other components may also be integrated on the sensor mounting housing, such as the input shaft 2.1, the torsion bar 2.2, the sensor assembly 2.6, the mounting bearing 2.9, the gear shaft 2.13, etc. Before the sensor mounting housing and the steering gear main housing 3 are detachably connected, the input shaft 2.1 and other components are pre-integrated into the sensor mounting housing to form a sensor mounting housing assembly.

[0051] In one embodiment, Figure 2 As shown, other components may also be integrated on the steering gear main housing 3, such as a steering rack 3.2, a rack support series component 3.3, a first bearing 3.4, etc. Before the sensor mounting housing and the steering gear main housing 3 are detachably connected, the steering rack 3.2 and other components are pre-integrated into the steering gear main housing 3 to form a steering gear main housing assembly.

[0052] After the sensor cover assembly, the sensor mounting housing assembly and the steering gear main housing assembly are formed respectively, the sensor cover 2, the sensor mounting housing 1 and the steering gear main housing 3 are detachably connected.

[0053] Exemplarily, the shaft body includes an input shaft 2.1, a torsion rod 2.2 and a gear shaft 2.13 connected in sequence, the input shaft 2.1 and the gear shaft 2.13 are fixedly connected via the torsion rod 2.2, the input shaft 2.1 is suitable for passing through the mounting shell to be connected to the steering wheel for transmission, and the gear shaft 2.13 extends into the steering gear main shell 3; the two ends of the torsion rod 2.2 are respectively pressed onto the input shaft 2.1 and the gear shaft 2.13.

[0054] Exemplarily, it also includes a first bearing 3.4, which is supported and connected to the gear shaft 2.13; wherein the first bearing 3.4 is one of a ball bearing and a needle bearing.

[0055] In one embodiment, Figure 2 As shown, one end of the torsion bar 2.2 is press-fitted on the input shaft 2.1 through a cylindrical pin 2.3 and an O-ring 2.4. The input shaft 2.1 and the torsion bar 2.2 extend toward the sensor cover 2 and pass through the sensor cover 2. The gear shaft 2.13 extends toward the steering gear main housing 3 to the reserved opening of the steering gear main housing 3, and the gear shaft 2.13 matches the steering rack 3.2, and the end of the gear shaft 2.13 contacts the first bearing 3.4, but the gear shaft 2.13 is not fixedly connected to the first bearing 3.4.

[0056] Exemplarily, the split-type steering gear further comprises a sensor assembly 2.6, wherein the sensor assembly 2.6 is mounted on the sensor mounting housing, and the sensor assembly 2.6 is located inside the sensor mounting housing.

[0057] In one embodiment, the sensor assembly 2.6 can be a whole or include multiple parts. For example, the sensor assembly 2.6 includes two components, wherein the first part is welded to the input shaft 2.1, and the second part is welded to the gear shaft 2.13, so that the sensor assembly 2.6 is installed on the sensor mounting housing. The sealed space formed by the connection between the sensor cover 2 and the sensor mounting housing is used to accommodate the sensor assembly, etc. Specifically, the sensor harness 1.2 integrated into the sensor cover 2 and the sensor assembly 2.6 integrated into the sensor mounting housing are both accommodated in the accommodation space formed by the sealed connection between the sensor cover 2 and the sensor mounting housing.

[0058] Exemplarily, the split steering gear further comprises a mounting bearing 2.9, which is arranged between the shaft body and the sensor mounting housing.

[0059] In one embodiment, the mounting bearing 2.9 includes but is not limited to a ball bearing, and a 4P bearing, i.e., a four-point contact ball bearing, is used. It has the characteristics of being able to withstand bidirectional axial loads, high limiting speed, compact design, separate design, high load bearing capacity and good axial limiting capacity, and is widely used in high-speed operation occasions that need to withstand large radial loads and axial loads, such as engines.

[0060] In one embodiment, the gear shaft 1.13 of the shaft body is connected to the mounting bearing 2.9 by a fixed connection method such as welding.

[0061] In one embodiment, the mounting bearing 2.9 and the sensor mounting housing are interference fit or transition fit, wherein interference fit refers to a fit with interference (including a minimum interference equal to zero); transition fit refers to a fit that may have a clearance or interference. In an interference fit, since the size of the shaft is larger than the size of the hole, it is necessary to use pressurization or thermal expansion and contraction methods for assembly. Transition fit is mainly used for positioning connections that require good centering and coaxiality between the hole and the shaft and are easy to disassemble and assemble.

[0062] In one embodiment, the split steering gear also includes a limiting mechanism for axially limiting and fixing the mounting bearing 2.9 on the sensor mounting housing; wherein the limiting mechanism includes a retaining spring 2.11 and an axial limiting ring 2.12, and the retaining spring 2.11 and the axial limiting ring 2.12 are suitable for being installed on the mounting bearing 2.9; wherein the mounting bearing 2.9 is fixed on the outer ring by the retaining spring 2.11, and / or the mounting bearing 2.9 is fixed on the inner ring by the axial limiting ring 2.12.

[0063] Specifically, the retaining ring 2.11 includes but is not limited to a pin gap retaining ring. The gear shaft 2.13 for mounting the bearing 2.9 and the shaft body is fixed with an inner ring by means of riveting using an axial limiting ring 2.12.

[0064] By first fixedly connecting the shaft body to the sensor mounting housing and then detachably connecting the sensor mounting housing to the steering gear main housing 3, the fixed connection between the shaft body and the steering gear main housing is avoided during the assembly process of the split steering gear. Compared with the prior art of welding the gear shaft at the end of the shaft body to the deep groove bearing inside the steering gear main housing, it is conducive to realizing the platformization of the steering gear main housing.

[0065] The split-type steering gear provided by the utility model can be an electric power steering gear, including but not limited to a column power steering gear, a single pinion power steering gear, a rack power steering gear, and a mechanical steering gear.

[0066] The utility model also includes a steering system, comprising the split steering gear as described above.

[0067] The utility model also includes a vehicle, comprising the split-type steering gear or the steering system as described above.

[0068] According to the split steering gear, steering system and vehicle provided by the utility model, by installing the shaft body on the sensor mounting shell and then making the sensor mounting shell detachably connected to the steering gear main shell, it is possible to first integrate other components such as the shaft body on the sensor mounting shell and then assemble and connect them with the steering gear main shell, which can greatly reduce the difficulty of mold development of the steering gear main shell, reduce development costs, and realize platformization and lightweight of the product.

[0069] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A split-type steering gear, characterized in that: include: A shaft body, a sensor mounting housing and a steering gear main housing (3), wherein the shaft body is suitable for being mounted on the sensor mounting housing, and the sensor mounting housing is detachably connected to the steering gear main housing (3).

2. The split-type steering gear according to claim 1, characterized in that: It also includes a mounting bearing (2.9), which is arranged between the shaft body and the sensor mounting housing.

3. The split-type steering gear according to claim 2, characterized in that: It also comprises a limiting mechanism for axially limiting and fixing the mounting bearing (2.9) on the sensor mounting housing.

4. The split-type steering gear according to claim 3, characterized in that: The limiting mechanism comprises a retaining spring (2.11) and an axial limiting ring (2.12), and the retaining spring (2.11) and the axial limiting ring (2.12) are suitable for being installed on the mounting bearing (2.9); The outer ring of the mounting bearing (2.9) is fixed by the retaining ring (2.11). And / or, the mounting bearing (2.9) is inner-ring fixed by means of the axial limiting ring (2.12).

5. The split-type steering gear according to claim 1, characterized in that: The sensor mounting housing is detachably connected to the steering gear main housing (3) via a threaded connection.

6. The split-type steering gear according to claim 1, characterized in that: The sensor mounting housing comprises a housing body (1) and a sensor cover body (2), wherein the sensor cover body (2) is detachably connected to the housing body (1).

7. The split-type steering gear according to claim 6, characterized in that: The sensor cover (2) and the housing body (1) are both provided with connecting through holes, and the steering gear main housing (3) is provided with a threaded hole, through which a connecting piece passes and is threadedly connected with the threaded hole.

8. The split-type steering gear according to claim 1, characterized in that: It also includes a sensor component (2.6), wherein the sensor component (2.6) is mounted on the sensor mounting housing, and the sensor component (2.6) is located in the sensor mounting housing.

9. The split-type steering gear according to claim 2, characterized in that: The shaft body comprises an input shaft (2.1), a torsion rod (2.2) and a gear shaft (2.13); the input shaft (2.1) and the gear shaft (2.13) are fixedly connected via the torsion rod (2.2); the input shaft (2.1) is suitable for passing through the mounting housing to be transmission-connected with the steering wheel; and the gear shaft (2.13) extends into the steering gear main housing (3).

10. The split-type steering gear according to claim 9, characterized in that: The two ends of the torsion rod (2.2) are respectively pressed onto the input shaft (2.1) and the gear shaft (2.13).

11. The split-type steering gear according to claim 9, characterized in that: It also includes a first bearing (3.4), which is supported and connected to the gear shaft (2.13).

12. The split-type steering gear according to claim 11, characterized in that: The first bearing (3.4) is one of a ball bearing and a needle bearing.

13. A steering system, characterized in that: A split steering gear comprising any one of claims 1 to 12.

14. A vehicle, characterized in that: It comprises the split steering gear according to any one of claims 1 to 12 or the steering system according to claim 13.

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