Steering device and all-terrain vehicle

Abstract

The steering device comprises a steering gear, a steering rocker arm and at least two fasteners, the output end of the steering gear is provided with a spline shaft, the steering rocker arm comprises a shaft sleeve and a rocker arm body which are connected, the shaft sleeve is provided with a spline hole, the spline shaft penetrates through the spline hole, and the rocker arm body is connected with the shaft sleeve. A spline hole is formed in the shaft sleeve, a notch communicated with the spline hole is formed in one radial side of the shaft sleeve, the notch penetrates through the shaft sleeve in the axial direction of the shaft sleeve, the two fasteners are arranged at intervals in the axial direction of the shaft sleeve, the fasteners penetrate through the shaft sleeve in the interval direction of the notch, and the fasteners are used for adjusting the gap of the notch. And therefore, the shaft sleeve tightly holds or releases the spline shaft. The steering device is reasonable in structural design, capable of bearing large loads and high in reliability.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a steering device and an all-terrain vehicle. Background Technology

[0002] All-terrain vehicles, also known as all-terrain four-wheel off-road vehicles, are simple, practical, and have good off-road performance. However, in related technologies, the structural design of the EPS output end and steering rocker arm in all-terrain vehicles is unreasonable. When the steering rocker arm bears a large load, there is a risk of loosening and breakage between the EPS output end and the steering rocker arm, reducing the reliability of the all-terrain vehicle during use. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] Therefore, embodiments of this utility model propose a steering device with a reasonable structural design, capable of withstanding large loads and exhibiting high reliability.

[0005] An embodiment of this utility model also proposes an all-terrain vehicle.

[0006] The steering device of this utility model includes: a steering gear, the output end of which has a splined shaft; a steering rocker arm, the steering rocker arm including a connected bushing and a rocker arm body, the bushing having a splined hole, the splined shaft passing through the splined hole, a notch communicating with the splined hole on a radial side of the bushing, the notch penetrating the bushing along the axial direction of the bushing; at least two fasteners, the two fasteners being arranged at intervals along the axial direction of the bushing, the fasteners passing through the bushing along the interval direction of the notch, the fasteners being used to adjust the gap of the notch so that the bushing grips or releases the splined shaft.

[0007] According to the embodiment of the present invention, the steering device allows the output end of the steering gear to drive the steering rocker arm to rotate synchronously due to the fit between the splined shaft of the steering gear and the splined hole of the bushing. When fixing the bushing, at least two fasteners can be used to tighten the notch, causing the bushing to grip the splined shaft, thereby reducing the assembly clearance between the splined shaft and the splined hole, which helps to reduce abnormal wear at the spline position. Furthermore, the two fasteners can each share a portion of the locking force and the load required under all-terrain vehicle operating conditions, thereby improving the reliability of the connection between the output end of the steering gear and the steering rocker arm, reducing the probability of loosening, breakage, and abnormal wear at the connection point, and improving the reliability of the steering device during operation.

[0008] In some embodiments, the outer wall surface of the spline shaft is provided with a positioning groove, which engages with the outer wall surface of the fastener to restrict the spline shaft from moving relative to the bushing along its axial direction.

[0009] In some embodiments, the fasteners include two fasteners, namely a first fastener and a second fastener, which are arranged at an axial distance along the bushing. The outer wall surface of the first fastener mates with the positioning groove, and the second fastener is spaced apart from the spline hole along the radial distance along the bushing.

[0010] In some embodiments, the fastener is a fastening bolt, and the steering device further includes a spring washer, which is sleeved on the fastening bolt and abuts between the end cap of the fastening bolt and the bushing.

[0011] In some embodiments, the steering gear further includes a steering housing, the spline shaft is located outside the steering housing, one end of the spline shaft adjacent to the steering housing is provided with an annular boss, one end of the bushing abuts against the annular boss, and the bushing is spaced apart from the steering housing.

[0012] In some embodiments, the splined shaft has a threaded section at one end away from the steering housing, the threaded section passing through the splined hole, and the steering device further includes a locking nut that engages with the threaded section and presses against the other end of the bushing.

[0013] In some embodiments, the steering device further includes a locking washer fitted onto the threaded section and located between the bushing and the locking nut, wherein the locking nut presses against the other end of the bushing via the locking washer.

[0014] In some embodiments, the threaded segment is provided with a insertion hole that extends radially through it, the insertion hole being located at one end of the threaded segment opposite to the spline shaft, and the steering device further includes a cotter pin, the cotter pin being installed in the insertion hole.

[0015] In some embodiments, the width of the rocker arm body gradually increases from top to bottom along the left-right direction. The rocker arm body is provided with two adapter holes, which are arranged adjacent to the lower side of the rocker arm body and spaced apart along the left-right direction. The adapter holes are used to install steering tie rods.

[0016] Another embodiment of the all-terrain vehicle of the present invention includes the steering device described in any one of the embodiments of the present invention.

[0017] According to an embodiment of the present invention, in an all-terrain vehicle, the output end of the steering gear can drive the steering rocker arm to rotate synchronously because the spline shaft of the steering gear mates with the spline hole of the bushing. When fixing the bushing, at least two fasteners can be used to press the notch, causing the bushing to grip the spline shaft, thereby reducing the assembly clearance between the spline shaft and the spline hole, which helps to reduce abnormal wear at the spline position. Furthermore, the two fasteners can each share a portion of the locking force and the load required by the all-terrain vehicle under operating conditions, thereby improving the reliability of the connection between the output end of the steering gear and the steering rocker arm, reducing the probability of loosening, breakage, and abnormal wear at the connection point, and improving the reliability of the steering device during operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the steering device according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 A magnified view of A in the middle.

[0020] Figure 3 This is a left view of the steering device according to an embodiment of the present invention.

[0021] Figure 4 This is a right view of the steering device according to an embodiment of the present invention.

[0022] Figure 5 This is an exploded view of the steering device according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 1. Steering gear; 11. Steering housing; 12. Splined shaft; 121. Annular boss; 122. Positioning groove; 13. Threaded section; 131. Insertion hole;

[0025] 2. Steering rocker arm; 21. Bushing; 211. Spline hole; 212. Notch; 213. Bushing body; 214. Protrusion; 22. Rocker arm body; 221. Adapter hole;

[0026] 3. Fasteners; 31. First fastener; 32. Second fastener;

[0027] 41. Lock nut; 42. Lock washer; 43. Cotter pin; 44. Spring washer;

[0028] 5. Steering tie rod. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] The following is a reference appendix. Figures 1 to 5 This invention describes a steering device and an all-terrain vehicle according to embodiments of the present invention.

[0031] like Figures 1 to 5 As shown, the steering device of this utility model embodiment includes: a steering gear 1, a steering rocker arm 2 and at least two fasteners 3, wherein the steering gear 1 is the EPS steering assist system.

[0032] The output end of the steering gear 1 has a splined shaft 12. The steering rocker arm 2 includes a connected bushing 21 and a rocker arm body 22. The bushing 21 has a splined hole 211. The splined shaft 12 passes through the splined hole 211. A notch 212 communicating with the splined hole 211 is provided on the radial side of the bushing 21. The notch 212 passes through the bushing 21 along the axial direction. Two fasteners 3 are arranged at intervals along the axial direction of the bushing 21. The fasteners 3 pass through the bushing 21 along the interval direction of the notch 212. The fasteners 3 are used to adjust the gap of the notch 212 so that the bushing 21 can hold or release the splined shaft 12.

[0033] According to the embodiment of the present invention, in the steering device, since the splined shaft 12 of the steering gear 1 is engaged with the splined hole 211 of the bushing 21, the output end of the steering gear 1 can drive the steering rocker arm 2 to rotate synchronously. When fixing the bushing 21, at least two fasteners 3 can be used to press the notch 212 to make the bushing 21 hold the splined shaft 12 tightly, thereby reducing the assembly clearance between the splined shaft 12 and the splined hole 211, which helps to reduce the problem of abnormal wear at the spline position. On the other hand, the two fasteners 3 can each share a part of the locking force and the load required to be borne under all-terrain vehicle conditions, thereby improving the reliability of the connection between the output end of the steering gear 1 and the steering rocker arm 2, reducing the probability of loosening, breakage, and abnormal wear at the connection position between the output end of the steering gear 1 and the steering rocker arm 2, and improving the reliability and durability of the steering device during operation.

[0034] In related technologies, the output end of the steering gear 1 is locked to the steering rocker arm 2 and the steering rocker arm 2 is axially positioned by only a single bolt. When driving under harsh conditions in all-terrain vehicles, the single bolt bears excessive load, often leading to bolt loosening or breakage. However, the steering device of the embodiment of this utility model uses at least two fasteners 3, which can improve the reliability of the connection between the output end of the steering gear 1 and the steering rocker arm 2.

[0035] Furthermore, the notch 212 extends through the bushing 21 axially, meaning the bushing 21 employs a fully slotted fit structure. Therefore, when the fastener 3 locks the bushing 21, the overall diameter of the spline hole 211 can be reduced, significantly decreasing the assembly clearance between the spline shaft 12 and the spline hole 211. This mitigates abnormal wear caused by relative movement between the spline shaft 12 and the spline hole 211, preventing increased steering free travel.

[0036] In the examples of this utility model, such as Figure 2 As shown, both fasteners 3 are fastening bolts, which facilitates the disassembly and assembly of the output end of the steering gear 1 and the steering rocker arm 2. Furthermore, the fasteners 3 (fastening bolts) are not limited by narrow or large installation spaces, and have a wide range of applications.

[0037] Optionally, such as Figure 5 As shown, the outer wall surface of the spline shaft 12 is provided with a positioning groove 122, which mates with the outer wall surface of the fastener 3 to restrict the axial movement of the spline shaft 12 relative to the bushing 21. It can be understood that after the fastener 3 is inserted into the bushing 21, the inner wall of the positioning groove 122 can fit against the outer wall of the fastener 3. Under the stopping action of the positioning groove 122, the fastener 3 can constrain the axial position of the spline shaft 12. Thus, the fastener 3 can restrict the axial movement of the spline shaft 12 along the spline hole 211, thereby axially positioning the spline shaft 12 and the spline hole 211 to improve the stability of the steering device installation.

[0038] Specifically, such as Figure 2 and Figure 5 As shown, the fastener 3 includes two fasteners, namely a first fastener 31 and a second fastener 32. The first fastener 31 and the second fastener 32 are arranged axially spaced along the bushing 21. The outer wall surface of the first fastener 31 mates with the positioning groove 122, and the second fastener 32 is spaced apart from the spline hole 211 radially along the bushing 21. It can be understood that one of the two fasteners 3 mates with the positioning groove 122 and provides locking force to the bushing 21, while the other of the two fasteners 3 only provides locking force to the bushing 21. This facilitates the installation of the fasteners 3, and the structural design is simple and the connection is reliable.

[0039] In one example, the fastener 3 is a fastening bolt, and the steering device also includes a spring washer 44. The spring washer 44 is sleeved on the fastening bolt and abuts between the end cap of the fastening bolt and the bushing 21. This reduces the probability of the fastener 3 and the bushing 21 becoming loose and improves the reliability of the connection between the fastener 3 and the bushing 21.

[0040] For example, the fastening bolt is a socket head cap bolt, with the end cap facing upwards to facilitate disassembly and assembly by the operator. The strength grade of the fastening bolt can be 10.9.

[0041] Optionally, such as Figure 5 As shown, the bushing 21 includes a bushing body 213 and two protrusions 214. A spline hole 211 is provided inside the bushing body 213. The two protrusions 214 are respectively provided on both sides of the bushing body 213 in the circumferential direction, and the two protrusions 214 are opposite to each other and spaced apart to form a notch 212. Two fasteners 3 are inserted through the two protrusions 214 along the spacing direction of the notch 212, thereby improving the overall structural strength of the bushing 21 and increasing the load-bearing capacity of the bushing 21.

[0042] In some embodiments, as Figures 1 to 5 As shown, the steering gear 1 also includes a steering housing 11. A splined shaft 12 extends out of the steering housing 11. An annular boss 121 is provided at one end of the splined shaft 12 adjacent to the steering housing 11. One end of the bushing 21 abuts against the annular boss 121, and the bushing 21 is spaced apart from the steering housing 11. It can be understood that the upper end face of the bushing 21 abuts against the lower end face of the annular boss 121, thereby axially limiting the steering rocker arm 2. The bushing 21 and the steering housing 11 are spaced apart to avoid wear caused by relative rotation between the bushing 21 and the steering housing 11.

[0043] Optionally, such as Figures 2 to 5 As shown, the splined shaft 12 has a threaded section 13 at the end opposite to the steering housing 11, which passes through the splined hole 211. The steering device also includes a locking nut 41, which engages with the threaded section 13 and presses against the other end of the bushing 21. It can be understood that one end of the bushing 21 is limited by the annular boss 121, and the other end is limited by the locking nut 41. This completely restricts the axial movement of the bushing 21 relative to the splined shaft 12 and reduces the impact load on the steering rocker arm 2, thereby further improving the reliability and durability of the connection between the output end of the steering gear 1 and the steering rocker arm 2.

[0044] For example, the strength grade of the lock nut 41 can be grade 8.

[0045] Specifically, such as Figures 2 to 5 As shown, the steering device also includes a locking washer 42, which is fitted onto the threaded section 13 and located between the bushing 21 and the locking nut 41. The locking nut 41 presses the other end of the bushing 21 against the locking washer 42. It is understood that the outer diameter of the locking washer 42 is larger than the outer diameter of the locking nut 41 to increase the contact area between the locking washer 42 and the bushing 21, and to prevent the locking nut 41 from loosening.

[0046] Furthermore, such as Figures 2 to 5 As shown, the threaded section 13 has a radially penetrating insertion hole 131 located at the end of the threaded section 13 away from the spline shaft 12. The steering device also includes a cotter pin 43, which is installed in the insertion hole 131. In other words, the insertion hole 131 is arranged near the end of the threaded section 13, and the cotter pin 43 is inserted into the insertion hole 131. The cotter pin 43 can stop the locking nut 41 to prevent the locking nut 41 from loosening from the threaded section 13, thereby improving the reliability of the connection between the output end of the steering gear 1 and the steering rocker arm 2.

[0047] In some embodiments, as Figure 1 and Figure 2 As shown, the width of the rocker arm body 22 gradually increases from top to bottom along the left and right directions, which can improve the structural strength of the rocker arm body 22, making the rocker arm body 22 more stable when moving and able to withstand greater loads.

[0048] like Figure 1 and Figure 2 As shown, the rocker arm body 22 is provided with two adapter holes 221. The two adapter holes 221 are arranged near the lower side of the rocker arm body 22 and are spaced apart in the left-right direction. The adapter holes 221 are used to install the steering tie rods 5. It can be understood that the two adapter holes 221 correspond to the left and right steering tie rods 5 respectively. One end of the steering tie rod 5 is connected to the adapter hole 221, and the other end of the steering tie rod 5 is connected to the wheel seat to control the steering of the wheel.

[0049] Another embodiment of the all-terrain vehicle of the present invention includes the steering device of the present invention.

[0050] According to the embodiments of the present invention, in the all-terrain vehicle, since the splined shaft 12 of the steering gear 1 is engaged with the splined hole 211 of the bushing 21, the output end of the steering gear 1 can drive the steering rocker arm 2 to rotate synchronously. When fixing the bushing 21, at least two fasteners 3 can be used to press the notch 212 to make the bushing 21 hold the splined shaft 12 tightly, thereby reducing the assembly clearance between the splined shaft 12 and the splined hole 211, which helps to reduce the problem of abnormal wear at the spline position. On the other hand, the two fasteners 3 can each share a part of the locking force and the load that the all-terrain vehicle needs to bear under working conditions, thereby improving the reliability of the connection between the output end of the steering gear 1 and the steering rocker arm 2, reducing the probability of loosening, breakage, and abnormal wear at the connection position between the output end of the steering gear 1 and the steering rocker arm 2, and improving the reliability of the steering device during operation.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0055] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A steering device, characterized in that, include: Steering gear, the output end of which has a splined shaft; A steering rocker arm, comprising a connected bushing and a rocker arm body, the bushing having a spline hole, the spline shaft passing through the spline hole, and a notch communicating with the spline hole on a radial side of the bushing, the notch penetrating the bushing along the axial direction of the bushing; At least two fasteners are provided, the two fasteners being arranged axially spaced along the bushing, the fasteners being inserted into the bushing along the spacing direction of the notch, the fasteners being used to adjust the gap of the notch so that the bushing grips or releases the splined shaft.

2. The steering device according to claim 1, characterized in that, The outer wall surface of the spline shaft is provided with a positioning groove, which cooperates with the outer wall surface of the fastener to restrict the spline shaft from moving relative to the bushing along its axial direction.

3. The steering device according to claim 2, characterized in that, The fasteners include two fasteners, namely a first fastener and a second fastener. The first fastener and the second fastener are arranged at an axial distance along the bushing. The outer wall surface of the first fastener mates with the positioning groove, and the second fastener is spaced apart from the spline hole along the radial distance of the bushing.

4. The steering device according to claim 2, characterized in that, The fastener is a fastening bolt, and the steering device also includes a spring washer, which is sleeved on the fastening bolt and abuts between the end cap of the fastening bolt and the bushing.

5. The steering device according to claim 1, characterized in that, The steering gear also includes a steering housing, the spline shaft is located outside the steering housing, one end of the spline shaft adjacent to the steering housing is provided with an annular boss, one end of the bushing abuts against the annular boss, and the bushing is spaced apart from the steering housing.

6. The steering device according to claim 5, characterized in that, The splined shaft has a threaded section at one end away from the steering housing, the threaded section passing through the splined hole. The steering device also includes a locking nut, which engages with the threaded section and presses against the other end of the bushing.

7. The steering device according to claim 6, characterized in that, The steering device also includes a locking washer, which is sleeved on the threaded section and located between the bushing and the locking nut. The locking nut presses the other end of the bushing against the locking washer.

8. The steering device according to claim 7, characterized in that, The threaded section is provided with a insertion hole that extends radially through it. The insertion hole is located at the end of the threaded section opposite to the spline shaft. The steering device also includes a cotter pin, which is installed in the insertion hole.

9. The steering device according to any one of claims 1-8, characterized in that, From top to bottom, the width of the rocker arm body gradually increases in the left-right direction. The rocker arm body is provided with two adapter holes, which are arranged adjacent to the lower side of the rocker arm body and spaced apart in the left-right direction. The adapter holes are used to install steering tie rods.

10. An all-terrain vehicle, characterized in that, The steering device includes any one of claims 1-9.

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