CN220785890U - Steering gear and vehicle - Google Patents

Abstract

The utility model discloses a steering gear and a vehicle, wherein the steering gear comprises: a housing; the steering screw rod is arranged in the shell; the bearing parts are arranged in the shell and are two, two bearing parts are respectively penetrated at the two axial ends of the steering screw rod, the steering screw rod can rotate relative to the two bearing parts, and the bearing parts are spherical roller bearings. Therefore, the two bearing parts are arranged in two, so that the two bearing parts are respectively penetrated at the two axial ends of the steering screw rod, and the bearing parts are arranged as spherical roller bearings, so that the bearing capacity of a single bearing part can be reduced, the size of the steering gear is reduced, the fatigue life of the steering screw rod and the two bearing parts is prolonged, and the reliability of the steering gear is improved.

Description

Steering gear and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a steering gear and a vehicle.

Background

Along with the development of electric and intelligent automobile market, the circulating ball steering gear for the commercial vehicle gradually steps into an electric train, and the structure of the current mainstream electric circulating ball steering gear mainly comprises: input shaft, bearing piece, steel ball lead screw and casing, wherein, the effect of bearing piece is: the steel ball screw is supported to run and bear the axial force and the radial force brought by the steel ball screw.

In the related art, most of the bearing parts are a pair of angle contact ball bearings, but the bearing capacity of the pair of angle contact ball bearings is small, so that the requirement of large output torque cannot be met, and the other parts adopt the crossed roller bearings and the needle roller bearings, so that the bearing capacity can be improved, but the bearing capacity of the two bearing parts is unbalanced, all axial loads are borne by the crossed roller bearings, the strength requirement on the bearing is high, the crossed overall size of the bearing is large, the structural arrangement is not facilitated, the size of the bearing installation part is large, and the lightweight design of the whole structure is influenced.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a steering gear which has a higher structural reliability and a better fatigue life.

The utility model further proposes a vehicle.

According to an embodiment of the present utility model, a steering gear includes: a housing; the steering screw rod is arranged in the shell; the bearing parts are arranged in the shell and are two, two bearing parts are respectively arranged at the two axial ends of the steering screw in a penetrating mode, the steering screw is rotatable relative to the two bearing parts, and the bearing parts are spherical roller bearings.

Therefore, the two bearing parts are arranged in two, so that the two bearing parts are respectively penetrated at the two axial ends of the steering screw rod, and the bearing parts are arranged as spherical roller bearings, so that the bearing capacity of a single bearing part can be reduced, the size of the steering gear is reduced, the fatigue life of the steering screw rod and the two bearing parts is prolonged, and the reliability of the steering gear is improved.

In some examples of the present utility model, the steering gear further includes a first locking member disposed in the housing, a first locking step is disposed on the steering screw, and one axial side of the bearing member corresponds to the first locking step and the first locking member locks the bearing member to the first locking step.

In some examples of the utility model, one axial side of the inner ring of the bearing member corresponds to the first locking step, and the first locking member corresponds to the other axial side of the inner ring of the bearing member.

In some examples of the present utility model, the first locking member is a first locking nut, and the steering screw is threaded through the first locking nut, and the first locking nut is in threaded connection with the steering screw.

In some examples of the present utility model, the steering screw includes a main body portion and mounting portions provided at both axial ends of the main body portion, the bearing member is provided at the mounting portions, a cross-sectional area of the mounting portions is smaller than a cross-sectional area of the main body portion, and the first locking step is defined between the mounting portions and the main body portion.

In some examples of the utility model, the mounting portion has a conical cross-section, the mounting portion having a cross-sectional area that gradually decreases in a direction away from the main body portion.

In some examples of the present utility model, the steering gear further includes a second locking member disposed in the housing, a second locking step is correspondingly disposed on the housing, one axial side of the outer ring of the bearing member corresponds to the second locking step, and the second locking member corresponds to the other axial side of the outer ring of the bearing member and locks the bearing member to the second locking step.

In some examples of the utility model, the second locking member is a second locking nut located circumferentially outward of the first locking nut, the second locking nut being threadably connected to the housing.

In some examples of the utility model, the housing comprises: the device comprises a main shell and a lower shell, wherein two ends of the main shell are opened, the lower shell is arranged at one end of the main shell, one of two bearing parts is arranged in the main shell, the other of the two bearing parts is arranged in the lower shell, and the main shell is an integrally formed structural part.

According to an embodiment of the present utility model, a vehicle includes: the diverter as described above.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a partial schematic view of a diverter according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a diverter according to an embodiment of the present utility model;

FIG. 3 is a schematic view of area A of FIG. 2;

fig. 4 is a schematic view of a bearing member according to an embodiment of the present utility model.

Reference numerals:

100. a diverter;

10. a housing; 11. a second locking step; 12. a main housing; 13. a lower housing;

20. a steering screw; 21. a first locking step; 22. a main body portion; 23. a mounting part;

30. a bearing member; 31. an inner ring; 32. a spherical roller; 33. an outer ring;

40. a first locking member; 50. a second locking member; 60. a retainer ring;

70. an input end cap; 71. a lower end cap; 72. a steel ball; 73. a steering nut; 74. steel ball guide pipe; 75. a catheter cap; 76. a steering arm shaft; 77. an input shaft; 78. torsion bar.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

A steering gear 100 according to an embodiment of the present utility model, which steering gear 100 can be applied to a vehicle, is described below with reference to fig. 1 to 4.

As shown in connection with fig. 1-4, a diverter 100 according to the present utility model may generally include: the steering screw 20 is arranged in the shell 10, the two bearing members 30 are arranged in the shell 10, two bearing members 30 are respectively arranged at two axial ends of the steering screw 20 in a penetrating mode, the steering screw 20 can rotate relative to the two bearing members 30, and the bearing members 30 are spherical roller bearings.

Specifically, the steering gear 100 is a recirculating ball steering gear, and the steering screw 20 and the two bearing members 30 are both disposed in the housing 10, so that the housing 10 can protect the steering screw 20 and the two bearing members 30, prevent the erosion of external foreign matters and the impact of external force, destroy the structures of the steering screw 20 and the two bearing members 30, and improve the structural reliability of the steering gear 100.

Further, when the recirculating ball steering gear works, the input shaft 77 is connected with the steering screw 20 and the transmission shaft, so that the rotational speed and torque of the steering column can be transmitted, the torsion bar 78 is connected with the steering screw 20 through a spline, the torsion bar 78 is connected with the input shaft 77 through a cylindrical pin, torsional deformation is generated during steering, the steering screw 20, the steel ball 72 and the steering nut 73 are matched to form a screw pair, the steel ball 72 rolls in a raceway formed by the steering screw 20 and the steering nut 73, so that load is transmitted, the steering screw 20 converts the rotational freedom degree of the steering screw 20 into the movement freedom degree of the steering nut 73, meanwhile, the torque is converted into push-pull force, the steering arm shaft 76 converts the translational freedom degree of the steering nut 73 into the rotational freedom degree of the steering arm shaft, meanwhile, the thrust of the steering nut 73 is converted into torque output, so that the normal work of the steering gear 100 can be ensured, the steering torque and the steering angle from the steering wheel can be converted, and the torque can be properly decelerated.

The steering screw 20 is required to bear the torque transmitted by the speed reducing mechanism and also bear the reverse acting force on the steering nut 73, and two bearing pieces 30 are respectively penetrated at two circumferential ends of the steering screw 20, so that the steering screw 20 can rotate relative to the bearing pieces 30, the two bearing pieces 30 not only can support the steering screw 20 and bear the axial force and the radial force of the steering screw 20, but also can reduce the friction coefficient in the movement process of the steering screw, and can ensure the rotation precision of the steering screw.

Further, the spherical roller bearing includes an inner ring 31, spherical rollers 32 and an outer ring 33, the outer ring 33 is disposed on the outer circumferential side of the inner ring 31, the spherical rollers 32 are disposed between the inner ring 31 and the outer ring 33, and by providing the bearing member 30 as a spherical roller bearing, the inner ring 31 of the spherical roller bearing is press-fitted with the steering screw 20, and the outer ring 33 of the spherical roller bearing is press-fitted with the housing 10, so that the axial force of the steering screw 20 can be applied to the pair of spherical roller bearings.

On the one hand, the bearing capacity of the single bearing member 30 can be reduced, not only the size of the single bearing member 30 can be reduced, thereby reducing the size of the steering gear 100, but also the load amplitude of the bearing members 30 can be reduced, improving the fatigue life of both bearing members 30.

On the other hand, since the spherical roller bearing has the automatic aligning performance, the extra bending moment on the bearing parts 30 can be effectively unloaded, so that the two bearing parts 30 can work under the working conditions of pure axial force and radial force, the bearing uniformity of each spherical roller 32 on the inner side and the outer side of the bearing parts 30 can be improved, the bearing parts 30 work within the rated working conditions, the rigidity of the steering screw 20 can be further improved, the abrasion of the steering screw 20 and the steering nut 73 is reduced, and the fatigue life of the steering screw 20 and the two bearing parts 30 can be further prolonged.

Thus, by arranging two bearing members 30 such that two bearing members 30 are respectively inserted into both axial ends of the steering screw 20 and arranging the bearing members 30 as spherical roller bearings, it is possible to reduce the load bearing capacity of a single bearing member 30, reduce the size of the steering gear 100, improve the fatigue life of the steering screw 20 and the two bearing members 30, and improve the reliability of the steering gear 100.

As shown in fig. 2 and 3, the steering gear 100 may further include a first locking member 40, where the first locking member 40 is disposed in the housing 10, a first locking step 21 is disposed on the steering screw 20, one axial side of the bearing member 30 corresponds to the first locking step 21, and the first locking member 40 corresponds to the other axial side of the bearing member 30 and locks the bearing member 30 to the first locking step 21.

Specifically, by providing the first locking step 21 on the steering screw 20, the bearing member 30 may be first disposed on the steering screw 20, one axial side of the bearing member 30 corresponds to the first locking step 21, the first locking step 21 may play a role in limiting the bearing member 30, and then the first locking member 40 is disposed in the housing 10, so that the first locking member 40 corresponds to the other axial side of the bearing member 30, and thus the bearing member 30 may be locked between the first locking step 21 and the first locking member 40, movement of the bearing member 30 in the axial direction may be limited, and stable installation and setting of the bearing member 30 may be ensured.

It should be noted that, the retaining ring 60 may be further disposed between the first locking step 21 and the bearing member 30, where one axial side of the retaining ring 60 abuts against the first locking step 21, and the other axial side of the retaining ring 60 abuts against the second locking step 11, so that the retaining ring 60 has a better axial bearing capacity on the premise of ensuring the limitation of the bearing member 30, and thus the structural reliability of the steering gear 100 may be further improved.

Further, as shown in fig. 2 and 3 in combination, one axial side of the inner ring 31 of the bearing member 30 corresponds to the first locking step 21, and the first locking member 40 corresponds to the other axial side of the inner ring 31 of the bearing member 30. Specifically, by associating one axial side of the inner ring 31 with the first locking step 21 and associating the first locking member 40 with the other axial side of the inner ring 31, the inner ring 31 of the bearing member 30 can be locked between the first locking step 21 and the first locking member 40, so that the axial movement of the inner ring 31 can be further limited, the synchronous movement of the inner ring 31 of the bearing member 30 and the steering screw 20 can be ensured, and the bearing member 30 can be ensured to work normally.

In some embodiments of the present utility model, as shown in connection with fig. 2 and 3, the first locking member 40 is a first locking nut, through which the steering screw 20 is threaded, and the first locking nut is screwed with the steering screw 20. Specifically, the first locking member 40 may be set as a first locking nut, so that only the steering screw 20 needs to be threaded with the first locking nut, so that the second locking nut is in threaded connection with the steering screw 20, and connection and fixation between the second locking nut and the steering screw 20 can be achieved, the first locking nut locks the inner ring 31 of the bearing member 30, and the bearing member 30 is prevented from moving axially, so that the structure of the first locking member 40 is simpler, the locking of the first locking member 40 to the bearing member 30 is easier, and the locking of the first locking member 40 to the bearing member 30 is simpler and more reliable. The first locking nut may be a K-type locking nut or a quincuncial locking nut, which is not specifically limited herein.

As shown in fig. 2 and 3, the steering screw 20 may mainly include a main body 22 and a mounting portion 23, the mounting portion 23 is disposed at both axial ends of the main body 22, the bearing member 30 is disposed at the mounting portion 23, the cross-sectional area of the mounting portion 23 is smaller than that of the main body 22, and a first locking step 21 is defined between the mounting portion 23 and the main body 22.

Specifically, the main body 22 of the steering screw 20 is used for forming a screw pair in cooperation with the steel ball 72 and the steering nut 73, the mounting portion 23 of the steering screw 20 is used for mounting the bearing member 30, and by arranging the mounting portion 23 at two axial ends of the main body 22, the symmetrical arrangement of the bearing member 30 at two ends of the steering screw 20 can be conveniently realized, so that the normal operation of the steering gear 100 can be ensured.

Further, by setting the cross-sectional area of the mounting portion 23 smaller than the cross-sectional area of the main body portion 22, the first locking step 21 can be naturally defined between the mounting portion 23 and the main body portion 22, so that the overall structure of the steering screw 20 can be made simpler, the production and manufacture of the steering screw 20 can be facilitated, and the production cost of the steering screw 20 and even the steering gear 100 can be reduced.

As shown in fig. 2 and 3, the cross section of the mounting portion 23 is conical, and the cross section of the mounting portion 23 gradually decreases in a direction away from the main body portion 22. Specifically, by making the cross section of the mounting portion 23 conical, the cross sectional area of the mounting portion 23 in the direction away from the main body portion 22 is gradually reduced, so that when the steering screw 20 is threaded through the bearing member 30, on one hand, the mounting portion 23 can be facilitated to be threaded through the bearing member 30, and the movement of the bearing member 30 can be guided, and on the other hand, in the process of gradually threading the steering screw 20 through the bearing member 30, the bearing member 30 is gradually close to the main body portion 22, and the inner ring 31 of the bearing member 30 and the mounting portion 23 are gradually in interference fit, so that the compression joint of the inner ring 31 of the bearing member 30 and the steering screw 20 can be realized, and thus, the installation setting of the bearing member 30 on the steering screw 20 can be simpler and more convenient, and is stable and reliable.

As shown in fig. 2 and 3, the steering gear 100 may further include a second locking member 50, where the second locking member 50 is disposed in the housing 10, a second locking step 11 is correspondingly disposed on the housing 10, one axial side of the outer ring 33 of the bearing member 30 corresponds to the second locking step 11, and the second locking member 50 corresponds to the other axial side of the outer ring 33 of the bearing member 30 and locks the bearing member 30 to the second locking step 11.

Specifically, by providing the second locking step 11 on the housing 10, the bearing member 30 may be first disposed on the steering screw 20, one axial side of the outer ring 33 of the bearing member 30 corresponds to the second locking step 11, the second locking step 11 may play a role in limiting the inner ring 31 of the bearing member 30, then the second locking member 50 is disposed in the housing 10, and the second locking member 50 corresponds to the other axial side of the outer ring 33 of the bearing member 30, so that the outer ring 33 of the bearing member 30 may be locked between the second locking step 11 and the second locking member 50, thereby further limiting the axial movement of the outer ring 33, ensuring the synchronous movement of the outer ring 33 of the bearing member 30 and the housing 10, and ensuring that the bearing member 30 may work normally.

In some embodiments of the present utility model, as shown in connection with fig. 2 and 3, the second locking member 50 is a second locking nut located circumferentially outward of the first locking nut, which is threadedly coupled to the housing 10. Specifically, the second locking member 50 may be configured as a second locking nut, so that only the second locking nut is in threaded connection with the housing 10, and the connection between the second locking nut and the housing 10 is achieved, so that the second locking nut locks the outer ring 33 of the bearing member 30, preventing the bearing member 30 from moving axially, so that the structure of the second locking member 50 is simpler, the locking of the second locking member 50 to the bearing member 30 is easier, and the locking of the second locking member 50 to the bearing member 30 is simpler and more reliable.

Further, the second lock nut is positioned on the outer side in the circumferential direction of the first lock nut, so that the second lock nut can fully utilize the space on the outer side in the circumferential direction of the first lock nut, and the structural compactness of the steering gear 100 can be improved. An increase in the axial dimension of the steering gear 100 can be avoided. The second locking nut may be a K-type locking nut or a quincuncial locking nut, which is not specifically limited herein.

As shown in connection with fig. 2, the housing 10 may mainly include: the device comprises a main shell 12 and a lower shell 13, wherein two ends of the main shell 12 are opened, the lower shell 13 is arranged at one end of the main shell 12, one of two bearing pieces 30 is arranged in the main shell 12, the other of the two bearing pieces 30 is arranged in the lower shell 13, and the main shell 12 is an integrally formed structural member.

Specifically, the housing 10 may include: the main casing 12 and the lower casing 13, both sides of the main casing 12 are opened, the lower casing 13 is connected on one end of the main casing 12 through bolts, one of the two bearing members 30 is arranged in the main casing 12, and the other of the two bearing members 30 is arranged in the lower casing 13, so that the arrangement of the two bearing members 30 in the casing 10 can be facilitated, and the assembly efficiency of the steering gear 100 can be improved.

Further, the main housing 12 may be formed as an integrally formed structural member, and the main housing 12 is integrally cast, so that not only can the production process of the main housing 12 be simplified and the production process of the main housing 12 be simplified, but also the integration level of the main housing 12 can be improved, and the structural strength of the main housing 12 can be effectively improved.

In addition, the steering gear 100 is further provided with an input end cover 70 and a lower end cover 71, the input end cover 70 is connected with the main housing 12 through bolts, and is used for bearing input shaft bearings, sealing rings, dust covers, sensor interfaces and the like, the lower end cover 71 is pressed on the lower housing 13 through bolts, and an O-ring is pressed in a sealing groove on the matching surface, so that a static sealing function is formed, and the main housing of the steering gear 100 can be closed.

As shown in fig. 1 and 2, the steering gear 100 is further provided with a steel ball guide tube 74 and a guide tube cover 75, the steel ball guide tube 74 can be used for reversing the steel ball 72 outside the steering nut 73, a complete cycle is formed, the guide tube cover 75 covers the steel ball guide tube 74, the steel ball guide tube 74 is positioned and locked on the surface of the steering nut 73, and meanwhile the guide tube cover 75 is tightly attached to the steel ball guide tube 74, so that the structural strength of the steel ball guide tube 74 is improved, and the steel ball guide tube 74 is prevented from cracking and failing. In some embodiments of the present utility model, the steel ball guide tube 74 may be provided in plurality, so that there may be a plurality of ball cycles between the steering screw 20 and the steering nut 73, thereby further reducing the frictional resistance between the steering screw 20 and the steering nut 73.

The vehicle according to the present utility model may include: the diverter 100 described above. Specifically, by applying the steering gear 100 to a vehicle, not only can the reliability of the vehicle be effectively improved, but also the difficulty in production of the vehicle can be reduced, so that the product competitiveness of the vehicle can be improved and the use experience of a user can be improved.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A diverter, comprising:

a housing (10);

a steering screw (20), the steering screw (20) being arranged within the housing (10);

the two bearing parts (30) are arranged in the shell (10), the two bearing parts (30) are respectively penetrated at the two axial ends of the steering screw (20), the steering screw (20) is rotatable relative to the two bearing parts (30), and the bearing parts (30) are spherical roller bearing parts.

2. The steering gear according to claim 1, further comprising a first locking member (40), wherein the first locking member (40) is disposed in the housing (10), a first locking step (21) is disposed on the steering screw (20), one axial side of the bearing member (30) corresponds to the first locking step (21), and the first locking member (40) corresponds to the other axial side of the bearing member (30) and locks the bearing member (30) to the first locking step (21).

3. Steering gear according to claim 2, wherein one axial side of the inner ring (31) of the bearing member (30) corresponds to the first locking step (21), and the first locking member (40) corresponds to the other axial side of the inner ring (31) of the bearing member (30).

4. Steering gear according to claim 2, characterized in that the first locking element (40) is a first locking nut, the steering screw (20) being threaded through the first locking nut, the first locking nut being in threaded connection with the steering screw (20).

5. The steering gear according to claim 2, wherein the steering screw (20) includes a main body portion (22) and a mounting portion (23), the mounting portion (23) is provided at both axial ends of the main body portion (22), the bearing member (30) is provided at the mounting portion (23), a cross-sectional area of the mounting portion (23) is smaller than a cross-sectional area of the main body portion (22), and the first locking step (21) is defined between the mounting portion (23) and the main body portion (22).

6. Steering gear according to claim 5, characterized in that the cross-section of the mounting portion (23) is conical, the cross-sectional area of the mounting portion (23) decreasing in a direction away from the main body portion (22).

7. The steering gear according to claim 2, further comprising a second locking member (50), the second locking member (50) being provided in the housing (10), a second locking step (11) being provided on the housing (10) correspondingly, one axial side of the outer ring (33) of the bearing member (30) corresponding to the second locking step (11), the second locking member (50) corresponding to the other axial side of the outer ring (33) of the bearing member (30) and locking the bearing member (30) to the second locking step (11).

8. Steering gear according to claim 7, characterized in that the second locking element (50) is a second locking nut, which is located circumferentially outside the first locking element (40), which is screwed with the housing (10).

9. Steering gear according to claim 1, characterized in that the housing (10) comprises: the novel bearing comprises a main shell (12) and a lower shell (13), wherein two ends of the main shell (12) are opened, the lower shell (13) is arranged at one end of the main shell (12), one of two bearing pieces (30) is arranged in the main shell (12), the other of the two bearing pieces (30) is arranged in the lower shell (13), and the main shell (12) is an integrally formed structural member.

10. A vehicle, characterized by comprising: the steering gear (100) of any one of claims 1-9.