CN108749912A - Steering gear and automobile - Google Patents

Abstract

The invention relates to a steering gear, which includes a steering gear, a rack meshed with the steering gear, and an adjustment device arranged on the side of the rack away from the steering gear. The adjustment device includes an engaging column, a screw plug and a fastening The nut and the screw plug are provided with a slot near the end surface of the engaging column, and a rubber ring is clamped in the slot. An avoidance gap and a first installation groove are respectively provided on the opposite sides of the engaging column, and the outer circumference of the engaging column is provided with a receiving Groove, the receiving groove is provided with an annular gasket that cooperates with the engaging column, and the opposite sides of the screw plug are respectively provided with a second installation groove and a third installation groove, the cavity formed by the first installation groove and the second installation groove An elastic member is provided inside, and a plug is provided in the third installation groove of the screw plug, and a blocking cover is provided on the side of the plug far away from the third installation groove, and an engaging groove engaged with the plug is provided at one end of the blocking cover , the steering gear can improve the NVH performance and steering reliability of the automobile, and the invention also relates to an automobile comprising the steering gear.

Description

Steering gear and car

technical field

The invention relates to the technical field of steering systems, in particular to a steering gear and an automobile.

Background technique

As we all know, a car is usually assembled from multiple system equipment and parts. The car steering gear is an important part for the driver to remotely operate the direction of the car. most of the composition. As an important part of adjusting and controlling the driving direction of the car through the steering mechanism during the driving process of the car, the steering gear plays a vital role in the actual steering control of the car.

However, with the rapid development of China's automobile industry, the competition among major domestic automobile brands is fierce, and the performance of automobiles is improving day by day. As an important indicator of automotive performance calibration, NVH has been paid more and more attention by people. As an important device for car steering, the steering gear can not only perform a simple car steering function, but also overcome the wheel's own steering due to the lateral interference force of the road surface. Therefore, improving the NVH performance of the steering gear has a positive effect on improving the overall NVH performance of the car. Crucial role.

In the prior art, the steering gear commonly used at present usually adopts the rack and pinion transmission mode. When the car is reversing from left to right, the gear shaft will mesh with the rack to the left and right, and vibrations and abnormal noises often occur during the left and right meshing process, which affects Steering reliability of automotive steering gear and its NVH performance.

Contents of the invention

Based on this, the object of the present invention is to provide a steering gear that improves the NVH performance and steering reliability of an automobile, and an automobile using the steering gear.

The present invention proposes a steering gear, which includes a steering gear, a rack meshed with the steering gear, and an adjustment device arranged on the side of the rack away from the steering gear. A combination column, a screw plug and a fastening nut, the fastening nut is used to fasten the screw plug, the screw plug is provided with a slot near the end surface of the engaging column, and a slot is stuck in the slot A rubber ring, an avoidance gap and a first installation groove are respectively provided on the opposite sides of the engaging column, at least one receiving groove is opened on the outer periphery of the engaging column, and the receiving groove is provided with a The ring gasket for the cooperation of the column, the opposite sides of the screw plug are respectively provided with a second installation groove and a third installation groove, the second installation groove and the third installation groove are connected through the connecting hole, and the first An elastic member is provided in the mold cavity formed by the installation groove and the second installation groove, and a stopper is provided in the third installation groove of the screw plug, and at least a part of the stopper extends through the connecting hole. Into the second installation groove, the side of the block away from the third installation groove is also provided with a blocking cover, and one end of the blocking cover is provided with an engaging groove engaged with the blockage, the The other end of the plug is flush with the end of the fastening nut.

The steering gear proposed by the present invention, through the set steering gear, the rack and the adjustment device, when the steering gear needs to be used, the steering gear is meshed with the rack, and the The adjustment device engages with the rack. Because the rubber ring can prevent the adjustment device from colliding with surrounding parts during the reversing process of the vehicle, resulting in vibration and noise; The lateral displacement tends to occur when the road surface is too bumpy, so most of the potential energy will be absorbed by the elastic member, and the ring gasket can absorb the remaining trace potential to play a buffering role and avoid the steering gear when it meshes with the rack. The large impact generated produces abnormal noise, thereby improving the reliability and NVH performance of the steering gear; the blockage and the blocking cover cooperate to prevent external dust and impurities from entering the The steering performance of the steering gear is reduced; in addition, the fastening nut is used to fasten the screw plug, which improves the reliability of the screw plug installation and meets the actual application requirements.

Further, a buffer pad is provided on the surface of the engaging column close to the rack, and the buffer pad is made of non-metallic high temperature resistant and wear-resistant material, and grease is coated on the buffer pad.

Further, the steering gear also includes a housing, the housing includes a first housing sleeved with the outer circumference of the rack, and a housing sleeved with the outer circumference of the steering gear and fixedly connected with the first housing. The second housing, and the third housing that is sleeved with the outer periphery of the adjustment device and fixedly connected with the first housing, the first housing, the second housing and the third housing A reinforcing plate is respectively arranged at the joint.

Further, the number of the rubber rings is two, and at least a part of one side of the ring gasket and the rubber ring respectively protrudes from the receiving groove and the slot.

Further, a buffer ring is respectively provided on opposite sides of the elastic member, one end of the buffer ring engages with the elastic member, and the other end of the buffer ring corresponds to the engaging column and the screw. Plug against each other.

Further, the plug is in interference fit with the through hole on the screw plug.

Further, the annular gasket, the rubber ring and the elastic member are arranged coaxially.

Further, the elastic member is any one of a tension spring and a shrapnel.

Further, an oil storage tank is respectively provided on opposite sides of the engaging column.

An automobile includes a steering system, and further includes the above-mentioned steering gear, and the steering gear is fixedly connected with a steering wheel in the steering system.

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

Description of drawings

Fig. 1 is the structural representation of diverter in the first embodiment of the present invention;

Fig. 2 is a schematic cross-sectional view of the diverter in the first embodiment of the present invention;

Fig. 3 is the schematic diagram of the installation of the screw plug in the steering gear shown in Fig. 2;

Fig. 4 is a schematic structural view of the buffer ring in the steering gear shown in Fig. 2;

Fig. 5 is a schematic structural diagram of the diverter in the second embodiment of the present invention.

Description of main symbols:

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. A preferred embodiment of the invention is shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIGS. 1 to 4, the steering gear in the first embodiment of the present invention includes a steering gear 10, a rack 20 meshed with the steering gear 10, and a rack 20 located on the rack 20 away from the steering gear. The adjusting device 30 on one side of 10, and a housing 40.

Further, the housing 40 is used to protect and limit the individual parts of the steering gear, so as to improve the reliability and service life of the steering gear. The housing 40 includes a first housing 41 sleeved with the outer circumference of the rack 20, a second housing 42 sleeved with the outer circumference of the steering gear 10 and fixedly connected with the first housing 41, and a sleeve There is a third housing 43 fixedly connected to the first housing 41 on the outer periphery of the adjusting device 30 . The first housing 41, the second housing 42 and the third housing 43 are integrally formed, thereby improving the The reliability of the connection of the shell 43 simplifies the manufacturing steps of the shell 40 and saves time and production cost.

In addition, a reinforcing plate 44 is respectively provided at the joints of the first shell 41, the second shell 42 and the third shell 43, and the shape of the reinforcing plate 44 is roughly trapezoidal. 44 cooperates with the first housing 41, the second housing 42 and the third housing 43 to improve the overall strength of the housing 40 and prevent the vehicle from being damaged by the The strength of the casing 40 is too low to cause deformation and fracture, thereby improving the overall reliability of the steering gear.

Further, the adjusting device 30 includes a locking column 31 , a screw plug 32 and a fastening nut 33 connected in sequence, and the fastening nut 33 is used to fasten the screw plug 32 .

An avoidance gap 311 and a first installation groove 312 are respectively defined on opposite sides of the engaging post 31 . The avoidance notch 311 is in the shape of a saddle, and the avoidance notch 311 is used to facilitate the engaging post 31 to engage the adjustment device 30 with the rack 20 . A buffer pad 313 is provided on the surface of the engaging post 31 close to the rack 20 , and the shape of the buffer pad 313 matches the shape of the engaging post 31 .

It can be understood that the buffer pad 313 is disposed in the avoidance gap 311 of the engaging post 31 and is fixedly connected with the engaging post 31 to reduce wear on the rack 20 . Therefore, the buffer pad 313 is made of non-metallic high-temperature-resistant and wear-resistant materials. In this embodiment, the buffer pad 313 is made of nylon material, but it is not limited thereto. In other embodiments, the buffer pad 313 can also be made of rubber material. Wherein, in order to avoid situations such as excessive temperature or noise due to excessive friction between the engaging column 31 and the rack 20 , the buffer pad 313 is coated with an appropriate amount of grease.

Wherein, two accommodating grooves 314 are defined on the outer periphery of the engaging column 31 , and the shape of the accommodating grooves 314 is ring-shaped. The receiving groove 314 is provided with an annular gasket 315 cooperating with the engaging column 31 , and at least a part of one side of the annular gasket 315 protrudes from the receiving groove 314 . It can be understood that the accommodating groove 314 cooperates with the annular washer 315 to prevent the adjusting device 30 and the third housing 43 from contacting the third housing 43 during the reversing process of the vehicle. Vibration and noise are generated by the collision of the inner wall, which improves the reliability of steering of the steering gear, thereby improving the reliability of vehicle steering and NVH performance as a whole.

Further, a second installation groove 321 and a third installation groove 322 are respectively provided on opposite sides of the screw plug 32, and the second installation groove 321 and the third installation groove 322 pass through a connecting hole (not shown in the figure) connected.

Wherein, an elastic member 323 is provided in the cavity formed by the first installation groove 312 and the second installation groove 321, and the elastic member 323 is used to limit the engaged rack 20 when the vehicle changes direction or the road surface is too bumpy. Lateral displacement tends to occur, so most of the potential energy will be absorbed by the elastic member 323. It can be understood that the elastic member 323 has elasticity and can play a buffering role. Therefore, the elastic member 323 is any one of a tension spring and a spring sheet. In this embodiment, the elastic member 323 is a tension spring.

A buffer ring 324 is respectively provided on opposite sides of the extension spring, one end of the buffer ring 324 engages with the extension spring member, and the other end of the buffer ring 324 corresponds to the second end of the engaging column 31. The bottom of the first mounting groove 312 and the bottom of the second mounting groove 321 of the screw plug 32 abut against each other. The buffer ring 324 cooperates with the tension spring to improve the buffer performance of the adjustment device 30 .

The third installation groove 322 of the screw plug 32 is provided with a plug 325, and at least a part of the plug 325 extends into the second installation groove 321 after one end of the plug 325 passes through the connecting hole (not shown in the figure); The side of the plug 325 away from the third installation groove 322 is also provided with a blocking cover 326, and one end of the blocking cover 326 is provided with an engaging groove (not shown) that engages with the plug 325. The other end of the plug 325 is flush with the end of the fastening nut 33 , and the engagement groove (not shown) is used to improve the reliability of the connection between the plug 325 and the plug 326 . The plug 325 and the through hole on the screw plug 32 adopt an interference fit assembly method, and an appropriate amount of liquid sealant is applied to the internal and external threads of the screw plug 32 to improve the sealing effect of the screw plug 32 . The blocking 325 cooperates with the blocking cover 326 to prevent the steering performance of the steering gear from being reduced due to external dust and impurities entering the steering gear, which meets the requirements of practical applications.

Further, the screw plug 32 is provided with a slot 327 on the end surface close to the engaging column 31, and a rubber ring 328 is stuck in the slot 327, at least a part of one side of the rubber ring 328 protrudes from the Slot 327 described above. The groove 327 cooperates with the rubber ring 328 to absorb the remaining trace potential energy after passing through the tension spring, so as to play a buffering role and avoid the friction generated when the steering gear 10 meshes with the rack 20. Larger impacts can cause abnormal noise, so that the reliability and NVH performance of the steering gear can be improved.

It should also be noted here that the annular gasket 315, the rubber ring 328 and the elastic member 323 are coaxially arranged so that the components in the adjustment device 30 are evenly stressed, and the adjustment device 30 is avoided. 30 Deformation and fracture due to uneven force. In this embodiment, both the annular gasket 315 and the rubber ring are O-rings. The engaging column 31, the buffer ring 324, the screw plug 32 and the plug 325 are all hollow structures, so that the pointer of the dial indicator can pass through during the process of adjusting the clearance of the steering gear. After passing through the plug 325 , the screw plug 32 and the engaging post 31 , it directly contacts the rack 20 at the meshing part, which improves the reliability of gap adjustment. Therefore, the adjustment device 30 can reduce the vibration and abnormal noise in the steering gear when the vehicle changes direction or the road surface is too bumpy, which meets the actual application requirements.

The steering gear proposed by the present invention, through the set steering gear 10, the rack 20 and the adjustment device 30, when the steering gear needs to be used, the steering gear 10 and the rack 20 are connected to each other. Engage the adjustment device 30 with the rack 20 . Since the rubber ring 328 can prevent the adjustment device 30 from colliding with the surrounding parts during the vehicle reversing process and generate vibration and noise; the elastic member 323 in the adjustment device 30 can limit the meshing rack 20 When the vehicle changes direction or the road surface is too bumpy, there is a tendency of lateral displacement, so most of the potential energy will be absorbed by the elastic member 323, and the annular gasket 315 can absorb the remaining trace potential to play a buffering role and avoid When the steering gear 10 meshes with the rack 20, the large impact generated causes abnormal noise, thereby improving the reliability and NVH performance of the steering gear; the block 325 cooperates with the block cover 326 function to prevent the steering performance of the steering gear from being reduced due to external dust and impurities entering into the steering gear; in addition, the fastening nut 33 is used to fasten the screw plug 32, which improves the screw plug 32. The reliability of plug 32 installation meets the actual application requirements.

Referring to Fig. 5, it is a schematic structural view of the steering gear in the second embodiment of the present invention, the steering gear in the present embodiment is roughly the same as the steering gear in the first embodiment, the difference is that the steering gear in the present embodiment On the basis of the first embodiment of the steering gear, an oil storage tank 316 is respectively provided on opposite sides of the engaging column 31, the oil storage tank 316 is in the shape of a drop, and the oil storage tank 316 is located near the avoidance gap 311. One side of the buffer pad 313, the oil storage tank 316 is used to lubricate the connection between the engaging column 31 and the rack 20 through the lubricating oil stored in the oil storage tank 316, so as to avoid the The engaging column 31 directly rubs against the rack 20 to generate vibration and relatively loud noise, which improves the NVH performance of the steering gear and meets the requirements of practical applications.

The present invention also relates to an automobile comprising the steering gear, the automobile comprising a steering system, and the steering gear is fixedly connected with a steering wheel in the steering system. The automobile in this embodiment is connected with the steering gear 10, the rack 20 meshing with the steering gear 10, the adjusting device 30 arranged on the side of the rack 20 away from the steering gear 10, and the housing 40. The steering wheel in the above steering system is fixedly connected, thereby improving the NVH performance and steering reliability of the vehicle, and meeting the actual application requirements.

The above examples only express several implementations of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. A steering gear, characterized in that it comprises a steering gear, a rack meshed with the steering gear, an adjusting device arranged on the side of the rack away from the steering gear, and the adjusting device includes sequentially Connected engaging column, screw plug and fastening nut, the fastening nut is used to fasten the screw plug, the end surface of the screw plug close to the engaging column is provided with a slot, and the slot A rubber ring is clamped inside, an avoidance gap and a first installation groove are respectively provided on opposite sides of the engaging column, at least one receiving groove is opened on the outer periphery of the engaging column, and the receiving groove is provided with An annular washer that cooperates with the engaging column, a second installation groove and a third installation groove are respectively provided on opposite sides of the screw plug, and the second installation groove and the third installation groove are connected through a connecting hole, so An elastic member is provided in the mold cavity formed by the first installation groove and the second installation groove, and a plug is provided in the third installation groove of the screw plug, and one end of the plug passes through the connecting hole at least A part extends into the second installation groove, the side of the block away from the third installation groove is also provided with a blocking cover, and one end of the blocking cover is provided with an engaging groove engaged with the blockage , the other end of the plug is flush with the end of the fastening nut. 2. The steering gear according to claim 1, characterized in that, a buffer pad is provided on the surface of the engaging column close to the rack, and the buffer pad is made of non-metallic high-temperature-resistant and wear-resistant materials , the buffer pad is coated with grease. 3. The steering gear according to claim 1, characterized in that, the steering gear further comprises a housing, the housing includes a first housing sleeved with the outer periphery of the rack, and a housing sleeved with the outer circumference of the rack. The second casing with the outer periphery of the steering gear fixedly connected with the first casing, and the third casing with the outer periphery of the adjustment device fixedly connected with the first casing, the first casing, the A reinforcing plate is respectively provided at the junction of the second shell and the third shell. 4. The steering gear according to claim 1, wherein there are two rubber rings, and at least a part of one side of the ring gasket and the rubber ring respectively protrudes from the receiving groove and the slotting. 5. The steering gear according to claim 1, wherein a buffer ring is respectively provided on opposite sides of the elastic member, one end of the buffer ring engages with the elastic member, and the buffer ring The other end correspondingly abuts against the engaging column and the screw plug. 6 . The steering gear according to claim 1 , wherein the plug is in interference fit with the through hole on the screw plug. 7 . 7 . The steering gear according to claim 4 , wherein the annular washer, the rubber ring and the elastic member are arranged coaxially, and the annular washer and the rubber ring are O-rings. 8 . The steering gear according to claim 7 , wherein the elastic member is any one of a tension spring and a shrapnel. 9 . The steering gear according to claim 1 , wherein an oil storage tank is respectively provided on opposite sides of the engaging column. 10. An automobile, characterized by comprising a steering system, and further comprising a steering gear according to any one of claims 1 to 9, the steering gear is fixedly connected to a steering wheel in the steering system.