Steering transmission device, steering system and vehicle

Abstract

The utility model discloses a steering transmission device, a steering system and a vehicle. A steering transmission device belongs to the technical field of vehicles and comprises a shell and a transmission assembly, the shell is provided with a mounting groove, at least part of the transmission assembly is arranged in the mounting groove, the transmission assembly comprises transmission teeth, a fixing part, a first bearing and a transmission shaft, a radial plate of the transmission teeth is provided with an assembly through hole, and the fixing part is in threaded fit with the groove wall of the mounting groove. The fixing piece is provided with an assembling groove corresponding to the assembling through hole, the transmission shaft penetrates through the transmission tooth, the fixing piece and the first bearing, the fixing piece is located on the side, away from a notch of the mounting groove, of the transmission tooth, and the assembling through hole is formed in the transmission tooth, so that a mounting tool can penetrate through the transmission tooth conveniently to fasten the fixing piece to the mounting groove; according to the steering transmission device, the assembly difficulty of the steering transmission device is reduced, and the steering transmission device can use an integrated shell, so that the overall strength and rigidity of the steering transmission device are improved, and the manufacturing and assembly cost of the transmission device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a steering transmission device, a steering system and a vehicle. Background Art

[0002] In the steering system of an automobile, an electric power-assist mechanism is usually provided for assisting steering. The electric power-assist mechanism consists of a main body casing and shaft transmission parts assembled in the main body casing. When the electric power-assist mechanism is assembled, the shaft transmission parts block each other and easily interfere with assembly tools, resulting in assembly difficulties.

[0003] In the related art, the main housing is usually split into a rack housing and a power-assist housing. During assembly, the shaft transmission parts can be first installed on the power-assist housing, and then the rack housing can be installed on the power-assist housing through fasteners. However, two sets of molds are required for the rack housing and the power-assist housing during manufacturing, and the two need to be connected by fasteners, which increases the manufacturing and assembly costs of the housing and reduces the overall stiffness and strength of the electric power-assist mechanism. Utility Model Content

[0004] The utility model aims to solve at least one of the above technical problems in the prior art to a certain extent. To this end, the utility model provides a steering transmission device, which can reduce the difficulty of assembling the steering transmission device and complete the assembly of the steering transmission device without disassembling the housing.

[0005] The utility model also provides a steering system with the steering transmission device.

[0006] The utility model also provides a vehicle with the steering system.

[0007] According to the steering transmission device of the embodiment of the utility model, it includes: a housing and a transmission assembly, the housing has a mounting groove, at least part of the transmission assembly is arranged in the mounting groove, the transmission assembly includes: a transmission tooth, a fixing member, a first bearing and a transmission shaft, the spoke plate of the transmission tooth has an assembly through hole; the fixing member is threadedly matched with the groove wall of the mounting groove, and the fixing member has an assembly groove corresponding to the assembly through hole; at least part of the first bearing is arranged in the fixing member; the transmission shaft passes through the transmission tooth, the fixing member and the first bearing, the transmission shaft is fixedly connected to the transmission tooth, and the transmission shaft is rotatably connected to the fixing member through the first bearing; wherein the fixing member is located on the side of the notch of the transmission tooth away from the mounting groove.

[0008] According to the steering transmission device of the embodiment of the present utility model, the transmission teeth of the transmission assembly are provided with assembly through holes corresponding to the assembly grooves of the fixing member, which facilitates the installation tool to pass through the transmission teeth to fasten the fixing member to the installation groove, so as to reduce the assembly difficulty of the steering transmission device. Moreover, the steering transmission device can use an integral housing, which is beneficial to improving the overall strength and stiffness of the steering transmission device and reducing the manufacturing and assembly costs of the transmission device.

[0009] According to some embodiments of the present utility model, the fixing member includes a fixing ring and a positioning ring. The fixing ring is in threaded cooperation with the groove wall of the installation groove; the positioning ring is connected to the fixing ring, and in the axial direction of the first bearing, the positioning ring is in guiding cooperation with the groove wall of the installation groove.

[0010] According to some embodiments of the present utility model, the fixing ring is located on the side of the positioning ring close to the transmission teeth, and the fixing ring has the assembly groove on the axial end face facing the transmission teeth.

[0011] According to some embodiments of the present utility model, the axial ends of the outer ring of the first bearing are respectively in limit cooperation with the fixing member and the groove wall of the installation groove.

[0012] According to some embodiments of the present utility model, the transmission assembly further includes a limiting member. The limiting member is fixedly connected to the transmission shaft, and the axial ends of the inner ring of the first bearing are respectively in limit cooperation with the transmission shaft and the limiting member.

[0013] According to some embodiments of the present utility model, the transmission shaft and the transmission teeth are in interference fit.

[0014] According to some embodiments of the present utility model, at the interference fit between the transmission shaft and the transmission teeth, the outer peripheral surface of the transmission shaft has anti-slip teeth.

[0015] According to some embodiments of the present utility model, the number of the assembly through holes and the assembly grooves is multiple.

[0016] According to the steering system of another embodiment of the present utility model, it includes the above-mentioned steering transmission device.

[0017] According to the steering system of the embodiment of the present utility model, its steering transmission device includes a transmission assembly. The transmission teeth of the transmission assembly are provided with assembly through holes corresponding to the assembly grooves of the fixing member, which facilitates the installation tool to pass through the transmission teeth to fasten the fixing member to the installation groove, so as to reduce the assembly difficulty of the steering transmission device. Moreover, the steering transmission device can use an integral housing, which is beneficial to improving the overall strength and stiffness of the steering transmission device and reducing the manufacturing and assembly costs of the transmission device.

[0018] A vehicle according to another embodiment of the present utility model includes the above-mentioned steering system.

[0019] For a vehicle according to an embodiment of the present utility model, its steering transmission device includes a transmission assembly. The transmission teeth of the transmission assembly have assembly through-holes corresponding to the assembly grooves of the fixing member, facilitating the installation tool to pass through the transmission teeth to fasten the fixing member to the installation groove, thereby reducing the assembly difficulty of the steering transmission device. And the steering transmission device can use an integral housing, which is beneficial to improving the overall strength and stiffness of the steering transmission device and reducing the manufacturing and assembly costs of the transmission device.

[0020] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0021] Figure 1 is an exploded view of a steering transmission device according to an embodiment of the present utility model;

[0022] Figure 2 is a perspective view of a transmission tooth according to an embodiment of the present utility model;

[0023] Figure 3 is a partial structural schematic diagram of a fixing member according to an embodiment of the present utility model;

[0024] Figure 4 is a perspective view of an installation tool according to an embodiment of the present utility model;

[0025] Figure 5 is a cross-sectional view of a steering transmission device and an installation tool according to an embodiment of the present utility model;

[0026] Figure 6 is an internal structure diagram of a steering transmission device and an installation tool according to an embodiment of the present utility model.

[0027] Reference Signs:

[0028] transmission tooth 1; spoke plate 11; assembly through-hole 111; fixing member 2; fixing ring 21; assembly groove 211; external thread 212; positioning ring 22; bearing mounting hole 23; first bearing 3; inner ring 31; outer ring 32; transmission shaft 4; anti-slip tooth 41; spiral tooth 42; limiting member 5; second bearing 6; rack pressing block group 7; rack 8; transmission assembly 10; housing 20; installation groove 201; internal thread 2011; steering transmission device 100; installation tool 200; torque input rod 2001; locking finger 2002. Detailed Embodiments

[0029] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and 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 limiting the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or may communicate with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between 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.

[0033] The following will be combined with Figures 1 - 6 Describe in detail the steering transmission device 100, steering system and vehicle according to embodiments of the present utility model.

[0034] Refer to Figures 1 - 3As shown in the figure, the steering transmission device 100 according to an embodiment of the present utility model includes a housing 20 and a transmission assembly 10. The housing 20 has an installation groove 201, and at least a part of the transmission assembly 10 is disposed in the installation groove 201. The transmission assembly 10 includes a transmission gear 1, a fixing member 2, a first bearing 3, and a transmission shaft 4. The web 11 of the transmission gear 1 has an assembly through hole 111. The fixing member 2 is in threaded cooperation with the groove wall of the installation groove 201. The fixing member 2 has an assembly groove 211 corresponding to the assembly through hole 111. At least a part of the first bearing 3 is disposed in the fixing member 2. The transmission shaft 4 passes through the transmission gear 1, the fixing member 2, and the first bearing 3. The transmission shaft 4 is fixedly connected to the transmission gear 1, and the transmission shaft 4 is rotatably connected to the fixing member 2 through the first bearing 3. Wherein, the fixing member 2 is located on the side of the transmission gear 1 away from the notch of the installation groove 201.

[0035] It should be noted that the steering transmission device 100 can be applied to the steering system of a vehicle. The steering system may further include an assist motor and a worm. The transmission gear 1 can be a worm gear. The assist motor is in transmission connection with the transmission gear 1 through the worm. The assist provided by the assist motor can be sequentially transmitted to a rack 8 meshing with the transmission shaft 4 through the worm, the transmission gear 1, and the transmission shaft 4, so as to provide assistance for the lateral movement of the rack 8, and further provide assistance for the steering of the vehicle, and the steering torque applied by the driver to the steering wheel can be reduced.

[0036] It can be understood that when the steering transmission device 100 is assembled, the transmission gear 1 can be fixedly connected to the transmission shaft 4 first, and then the fixing member 2 can be indirectly connected to the transmission shaft 4 through the first bearing 3, so that the transmission gear 1, the fixing member 2, the first bearing 3, and the transmission shaft 4 form a whole, and then the whole is installed on the housing 20 through the threaded cooperation between the fixing member 2 and the groove wall of the installation groove 201.

[0037] Refer to Figures 1 - 3 As shown in the figure, the outer peripheral wall of the fixing member 2 has an external thread 212, and the groove wall of the installation groove 201 has an internal thread 2011 corresponding to the external thread 212. Through the threaded cooperation between the external thread 212 and the internal thread 2011, the fixing member 2 can be installed and fixed on the housing 20. The web 11 of the transmission gear 1 is provided with an assembly through hole 111 corresponding to the assembly groove 211 of the fixing member 2. The assembly through hole 111 is adapted to avoid an installation tool 200 for adjusting the fixing member 2. When the whole composed of the transmission gear 1, the fixing member 2, the first bearing 3, and the transmission shaft 4 is installed on the housing 20, the installation tool 200 can pass through the transmission gear 1 through the assembly through hole 111 and insert into the assembly groove 211 of the fixing member 2, so that the fixing member 2 can be screwed by the installation tool 200, so that the fixing member 2 is in threaded cooperation with the groove wall of the installation groove 201, and the tightening of the fixing member 2 in the installation groove 201 is realized, and further the whole of the transmission gear 1, the fixing member 2, the first bearing 3, and the transmission shaft 4 is installed in the housing 20.

[0038] Refer toFigure 4 As shown, the installation tool 200 may include a connected torque input rod 2001 and a locking finger 2002. The locking finger 2002 may be configured as a columnar protrusion structure. The locking finger 2002 is adapted to pass through the assembly through-hole 111 and insert into the assembly groove 211 of the fixing member 2. By turning the torque input rod 2001, the fixing member 2 can be driven to rotate, so that the fixing member 2 can be installed on the housing 20.

[0039] In this embodiment, by providing the assembly through-hole 111 on the transmission gear 1, it is convenient for the installation tool 200 to pass through the transmission gear 1 to fasten the fixing member 2 to the installation groove 201, avoiding interference between the installation tool 200 and the housing 20 and the transmission gear 1. The assembly operation of the steering transmission device 100 is simple and convenient. Moreover, the housing 20 can be configured as an integral structure. Compared with a split housing, the integral housing 20 does not need to be connected by fasteners, which is beneficial to reducing the connection cost and the weight of the housing 20, and only needs to be manufactured by a set of molds, thus being beneficial to reducing the cost of manufacturing molds. In addition, the integral housing 20 has better strength and stiffness, which is beneficial to improving the overall strength and stiffness of the steering transmission device 100.

[0040] According to the steering transmission device 100 of the embodiment of the present invention, the transmission gear 1 of the transmission assembly 10 has an assembly through-hole 111 corresponding to the assembly groove 211 of the fixing member 2, which is convenient for the installation tool 200 to pass through the transmission gear 1 to fasten the fixing member 2 to the installation groove 201, so as to reduce the assembly difficulty of the steering transmission device 100. And the steering transmission device 100 can use an integral housing 20, which is beneficial to improving the overall strength and stiffness of the steering transmission device 100 and reducing the manufacturing and assembly cost of the transmission device 100.

[0041] In some embodiments of the present invention, referring to Figure 1 and Figure 3 As shown, the fixing member 2 includes a fixing ring 21 and a positioning ring 22. The fixing ring 21 is in threaded cooperation with the groove wall of the installation groove 201. The positioning ring 22 is connected to the fixing ring 21. In the axial direction of the first bearing 3, the positioning ring 22 is in guiding cooperation with the groove wall of the installation groove 201, so that the axis of the fixing member 2 coincides with the axis of the first bearing 3, preventing the fixing member 2 from tilting axially, which is beneficial to improving the assembly accuracy of the steering transmission device 100.

[0042] In some embodiments of the present invention, referring to Figure 1As shown, the fixing ring 21 is located on the side of the positioning ring 22 close to the transmission tooth 1. The fixing ring 21 has an assembly groove 211 on the axial end face facing the transmission tooth 1. When the fixing member 2 is installed to the installation groove 201, the positioning ring 22 can first cooperate with the groove wall guide of the installation groove 201 to ensure the axial accuracy of the fixing member 2. When the fixing ring 21 is screwed into the groove wall of the installation groove 201, the axial deviation of the fixing member 2 can be effectively avoided to avoid the fixing member 2 from slipping, which is beneficial to improve the stability and reliability of the connection between the fixing member 2 and the housing 20.

[0043] Reference Figure 1 and Figure 3 As shown, the outer diameter of the fixing ring 21 is greater than the outer diameter of the positioning ring 22 , and the connecting end surfaces of the fixing ring 21 and the positioning ring 22 are suitable for abutting against the housing 20 to achieve the positioning of the fixing member 2 .

[0044] In other embodiments of the utility model not shown in the figures, the fixing ring 21 is located on the side of the positioning ring 22 away from the transmission tooth 1, and the positioning ring 22 has an assembly groove 211 on the axial end face facing the transmission tooth 1, wherein the outer diameter of the positioning ring 22 is larger than the outer diameter of the fixing ring 21, which is beneficial to improve the contact area between the positioning ring 22 and the housing 20, and is beneficial to improve the stability and reliability of the connection between the positioning ring 22 and the housing 20.

[0045] In some embodiments of the present invention, referring to Figure 5 and Figure 6 As shown, the axial ends of the outer ring 32 of the first bearing 3 are respectively limitedly matched with the fixing member 2 and the groove wall of the installation groove 201 to achieve the positioning of the first bearing 3.

[0046] Reference Figure 3 , Figure 4 and Figure 5 As shown, the fixing member 2 is formed with a bearing mounting hole 23, and at least part of the first bearing 3 is mounted in the bearing mounting hole 23, in the axial direction of the first bearing 3, that is, Figure 4 and Figure 5 In the upper and lower directions, the lower end surface of the outer ring 32 of the first bearing 3 abuts against the groove wall of the installation groove 201 , and the upper end surface of the outer ring 32 of the first bearing 3 abuts against the fixing member 2 , thereby realizing the positioning of the first bearing 3 .

[0047] In some embodiments of the present invention, referring to Figure 1 , Figure 5 and Figure 6 As shown, the transmission assembly 10 also includes a limiter 5, which is fixedly connected to the transmission shaft 4. The axial ends of the inner ring 31 of the first bearing 3 are respectively limited by the transmission shaft 4 and the limiter 5 to achieve axial limitation of the first bearing 3.

[0048] Reference Figure 1, Figure 5 and Figure 6 As shown in Figure 5 and Figure 6 , the limiting member 5 is configured as an annular structure. The limiting member 5 is adapted to be sleeved on the transmission shaft 4 and riveted with the transmission shaft 4 to achieve the fixed connection between the limiting member 5 and the transmission shaft 4. In the up and down direction, the upper end of the inner ring 31 of the first bearing 3 abuts against the transmission shaft 4, and the lower end of the inner ring 31 of the first bearing 3 abuts against the upper end of the limiting member 5, so as to realize the axial limit of the first bearing 3 and prevent the first bearing 3 from axially displacing. When the whole composed of the driving gear 1, the transmission shaft 4, the first bearing 3, the limiting member 5 and the fixing member 2 is installed on the housing 20, the limiting member 5 can stop the first bearing 3 below the first bearing 3 to avoid the first bearing 3 falling off the transmission shaft 4, which is convenient for installing the driving gear, the transmission shaft 4, the first bearing 3, the limiting member 5 and the fixing member 2 as a whole on the housing 20.

[0049] In some embodiments of the present utility model, the first bearing 3 may be a four-point bearing. The axial two ends of its outer ring 32 are respectively in limiting cooperation with the fixing member 2 and the groove wall of the installation groove 201, and the axial two ends of the inner ring 31 are respectively in limiting cooperation with the transmission shaft 4 and the limiting member 5, so as to realize the precise positioning of the first bearing 3.

[0050] In some embodiments of the present utility model, the transmission shaft 4 and the driving gear 1 are in interference fit to achieve the fixed connection between the transmission shaft 4 and the driving gear 1. The transmission shaft 4 and the driving gear 1 do not need to be connected through other components, which is beneficial to improving the convenience of assembling the transmission shaft 4 and the driving gear 1, and is also beneficial to reducing the number of components of the transmission assembly 10 and saving the production and manufacturing cost of the transmission assembly 10.

[0051] In some embodiments of the present utility model, referring to Figure 1 As shown in Figure 1 , at the interference fit position between the transmission shaft 4 and the driving gear 1, the outer peripheral surface of the transmission shaft 4 has anti-slip teeth 41. The anti-slip teeth 41 can increase the friction force between the transmission shaft 4 and the driving gear 1, which is beneficial to improving the connection strength between the transmission shaft 4 and the driving gear 1, preventing the relative movement between the transmission shaft 4 and the driving gear 1, and is beneficial to the precise transmission between the transmission shaft 4 and the driving gear 1.

[0052] Among them, the anti-slip teeth 41 are configured as radially protruding structures, and the number of the anti-slip teeth 41 can be one or more. When the driving gear 1 is installed on the transmission shaft 4, the anti-slip teeth 41 can be pressed into the inner peripheral surface of the hub of the driving gear 1 to achieve the limiting cooperation between the transmission shaft 4 and the driving gear 1, which can effectively prevent the relative movement between the transmission shaft 4 and the driving gear 1 and is beneficial to the precise transmission between the transmission shaft 4 and the driving gear 1.

[0053] In some embodiments of the utility model, the number of assembly through holes 111 and the number of assembly grooves 211 are both multiple, and the installation tool 200 can pass through the multiple assembly through holes 111 and be inserted into the corresponding assembly grooves 211. The installation tool 200 can form multiple connection points with the multiple assembly grooves 211. When a force is applied to the installation tool 200 to drive the fixing member 2 to rotate, the force can be dispersedly transmitted to the fixing member 2 through the multiple connection points, which can reduce the local force on the fixing member 2, which is beneficial to reducing the risk of local deformation of the fixing member 2 and is beneficial to stably and reliably driving the fixing member 2 to rotate.

[0054] In some embodiments of the present invention, referring to Figure 4 As shown, the installation tool 200 includes a plurality of locking fingers 2002, and the plurality of locking fingers 2002 are suitable for corresponding one-to-one with a plurality of assembly grooves 211. Each locking finger 2002 is suitable for being inserted into a corresponding assembly groove 211. The plurality of locking fingers 2002 can form a plurality of groups of cooperation with the plurality of assembly grooves 211, which is beneficial to improving the connection reliability between the installation tool 200 and the fixing member 2.

[0055] In some embodiments of the present invention, referring to Figure 1 , Figure 5 and Figure 6 As shown, the transmission assembly 10 also includes a second bearing 6. One end of the transmission shaft 4 close to the bottom of the installation groove 201 is rotatably connected to the housing 20 through the second bearing 6. The second bearing 6 can support and limit the transmission shaft 4 to improve the stability of the transmission shaft 4.

[0056] In some embodiments of the present invention, referring to Figure 1 and Figure 6 As shown, the transmission shaft 4 has a helical tooth 42, and the steering transmission device 100 also includes a rack pressure block group 7 and a rack 8. The rack 8 is suitable for meshing with the helical tooth 42. The rack 8 can also be connected to the steering knuckle of the wheel through a steering rod. The rotation of the transmission shaft 4 can drive the rack 8 to move in a straight line, so that the rack 8 can drive the steering knuckle to move through the steering rod to achieve the steering of the vehicle. The rack pressure block group 7 is suitable for applying a force to the rack 8 toward the transmission shaft 4 so that the rack 8 is tightly meshed with the helical tooth 42, which is beneficial to the precise transmission of the rack 8 and the transmission shaft 4.

[0057] In some embodiments of the present invention, the steps of installing the steering transmission device 100 include:

[0058] Step S1: Install and fix the transmission gear on the transmission shaft.

[0059] The transmission gear 1 is fixedly connected to the transmission shaft 4 through interference fit.

[0060] Step S2: Install the outer ring of the first bearing inside the fixing member.

[0061] Among them, two fixing parts 2 are sleeved on the outer ring 32 of the first bearing 3. The upper end surface of the outer ring 32 of the first bearing 3 abuts against the fixing part 2, and the outer ring 32 of the first bearing 3 can be in interference fit with the fixing part 2.

[0062] Step S3: Install and fix the inner ring of the first bearing on the transmission shaft.

[0063] Among them, the transmission shaft 4 passes through the fixing part 2 and the inner ring 31 of the first bearing 3, so that the inner ring 31 of the first bearing 3 is sleeved on the transmission shaft 4. The upper end surface of the inner ring 31 of the first bearing 3 abuts against the transmission shaft 4, and the inner ring 31 of the first bearing 3 can be in interference fit with the transmission shaft 4.

[0064] Step S4: Install and fix the limiting part on the transmission shaft.

[0065] Among them, the limiting part 5 is sleeved on the transmission shaft 4. The limiting part 5 can be fixedly connected to the transmission shaft 4 through interference fit. The limiting part 5 is adapted to abut against the lower end surface of the inner ring 31 of the first bearing 3 to realize the stop of the first bearing 3 and prevent the first bearing 3 from falling off the transmission shaft 4.

[0066] Step S5: Install the transmission gear, transmission shaft, first bearing, limiting part and fixing part as a whole on the housing to complete the assembly of the steering transmission device.

[0067] Among them, the locking finger 2002 of the installation tool 200 passes through the assembly through hole 111 of the transmission gear 1 and is inserted into the installation groove 201 of the fixing part 2. By rotating the torque input rod 2001 of the installation tool 200, the fixing part 2 can be driven to rotate to tighten the fixing part 2, so as to install the transmission gear 1, transmission shaft 4, first bearing 3, limiting part 5 and fixing part 2 as a whole on the housing 20.

[0068] It can be understood that when the fixing part 2 is screwed and rotated by the installation tool 200, the transmission shaft 4 and the transmission gear 1 will rotate together with the fixing part 2. The rotation of the transmission shaft 4 will drive the rack 8 to move. After the fixing part 2 is tightened, it may cause the rack 8 not to be in the preset position. Therefore, after the fixing part 2 is tightened, the transmission gear 1 can be rotated in the reverse direction of the rotation of the transmission gear 1 during the screwing process of the fixing part 2. The transmission gear 1 can drive the transmission shaft 4 to rotate, and the transmission shaft 4 can drive the rack 8 to move to the preset position, so as to realize the reset of the transmission gear 1 and the rack 8.

[0069] According to the steering transmission device 100 of the embodiment of the present utility model, through the orifice plate hub process hole (assembly through hole 111) of the circumferential movement part (transmission gear 1), it is convenient for the assembly of the steering transmission device 100. The housing 20 is constructed as an integral structure, which is beneficial to reducing the connection cost and only needs to be manufactured by a set of molds, thus being beneficial to reducing the cost of manufacturing molds, beneficial to the cost control of vehicle manufacturing, and can also improve the overall stiffness and strength of the steering transmission device 100, as well as reduce the overall weight of the steering transmission device 100 and reduce the transportation cost.

[0070] This embodiment has no influence on the existing shafting part assembly process and manufacturing process, can perform a parallel upgrade and replacement on the existing housing 20 scheme of the worm and worm gear type electric power steering machine, reduces the weight of the steering transmission device 100 while improving the overall strength and stiffness, has the advantages of cost reduction, simple structure, convenient installation, high reliability, etc., is applicable to modern electric power steering machines, and can improve the performance while reducing the cost.

[0071] According to the steering system of another embodiment of the present utility model, it includes the steering transmission device 100 of the above embodiment.

[0072] According to the steering system of the embodiment of the present utility model, its steering transmission device 100 includes a transmission component 10. The transmission gear 1 of the transmission component 10 has an assembly through hole 111 corresponding to the assembly groove 211 of the fixing part 2, which is convenient for the installation tool 200 to pass through the transmission gear 1 to fasten the fixing part 2 to the installation groove 201, so as to reduce the assembly difficulty of the steering transmission device 100. And the steering transmission device 100 can use an integral housing 20, thus being beneficial to improving the overall strength and stiffness of the steering transmission device 100 and reducing the manufacturing and assembly cost of the transmission device 100.

[0073] In some embodiments of the present utility model, the steering system can be a worm and worm gear type electric power steering machine, that is, a steering machine that transmits the power of the steering assist motor through a worm and worm gear, including P-EPS and DP-EPS. Among them, EPS is an electric power steering system, P-EPS is an electric power steering system in which the torque generated by the steering assist motor is directly transmitted to the steering pinion and rack through a worm and worm gear transmission mechanism, and DP-EPS is an electric power steering system in which the torque generated by the steering assist motor is directly transmitted to the second steering pinion and the second rack through a worm and worm gear transmission mechanism.

[0074] According to the vehicle of still another embodiment of the present utility model, it includes the steering system of the above embodiment.

[0075] A vehicle according to an embodiment of the present utility model, its steering system includes a steering transmission device 100, the steering transmission device 100 includes a transmission assembly 10, and the transmission teeth 1 of the transmission assembly 10 are provided with assembly through holes 111 corresponding to the assembly grooves 211 of the fixing member 2, facilitating the installation tool 200 to pass through the transmission teeth 1 to fasten the fixing member 2 to the installation groove 201, so as to reduce the assembly difficulty of the steering transmission device 100, and the steering transmission device 100 can use an integrated housing 20, which is beneficial to improving the overall strength and stiffness of the steering transmission device 100 and reducing the manufacturing and assembly cost of the transmission device 100.

[0076] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0077] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A steering transmission device, characterized in that, Comprising: A housing (20) and a transmission assembly (10), the housing (20) having a mounting groove (201), at least part of the transmission assembly (10) being disposed within the mounting groove (201), the transmission assembly (10) comprising: A transmission gear (1), the web (11) of the transmission gear (1) having an assembly through-hole (111); A fixing member (2), the fixing member (2) being in threaded engagement with the groove wall of the mounting groove (201), the fixing member (2) having an assembly groove (211) corresponding to the assembly through-hole (111); A first bearing (3), at least part of the first bearing (3) being disposed within the fixing member (2); A transmission shaft (4), the transmission shaft (4) passing through the transmission gear (1), the fixing member (2) and the first bearing (3), the transmission shaft (4) being fixedly connected to the transmission gear (1), the transmission shaft (4) being rotatably connected to the fixing member (2) through the first bearing (3); Wherein, the fixing member (2) is located on the side of the transmission gear (1) facing away from the notch of the mounting groove (201).

2. The steering transmission device according to claim 1, characterized in that, The fixing member (2) comprises: A fixing ring (21), the fixing ring (21) being in threaded engagement with the groove wall of the mounting groove (201); A positioning ring (22), the positioning ring (22) being connected to the fixing ring (21), in the axial direction of the first bearing (3), the positioning ring (22) being in guiding engagement with the groove wall of the mounting groove (201).

3. The steering transmission device according to claim 2, characterized in that, The fixing ring (21) is located on the side of the positioning ring (22) close to the transmission gear (1), the fixing ring (21) having the assembly groove (211) on its axial end face facing the transmission gear (1).

4. The steering transmission device according to claim 1, wherein Axial ends of the outer ring (32) of the first bearing (3) are respectively in limiting engagement with the fixing member (2) and the groove wall of the mounting groove (201).

5. The steering transmission device according to claim 4, wherein, The transmission assembly (10) further comprises a limiting member (5), the limiting member (5) being fixedly connected to the transmission shaft (4), axial ends of the inner ring (31) of the first bearing (3) being respectively in limiting engagement with the transmission shaft (4) and the limiting member (5).

6. The steering transmission device according to claim 1, characterized in that, The transmission shaft (4) is in interference fit with the transmission gear (1).

7. The steering transmission device according to claim 6, characterized in that, At the interference fit between the transmission shaft (4) and the transmission gear (1), the outer peripheral surface of the transmission shaft (4) has anti-slip teeth (41).

8. The steering transmission device according to any one of claims 1-7, characterized in that, The number of the assembly through-holes (111) and the assembly grooves (211) is multiple.

9. A steering system, characterized in that, Comprising the steering transmission device according to any one of claims 1-8.

10. A vehicle, characterized in that, Comprising the steering system according to claim 9.

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