阅读说明：本技术 一种噪声较小的新型齿轮齿条式转向器 (Novel rack-and-pinion steering gear with low noise ) 是由 郑竹安 魏金呈 张坤 石小龙 熊新 翟豪瑞 孙婷婷 于 2021-10-08 设计创作，主要内容包括：本发明公开了一种噪声较小的新型齿轮齿条式转向器,包括齿轮齿条式转向器本体,在齿轮齿条式转向器本体上设有转向齿条,转向齿条外部转向齿条箱桶的一端外部设有转向蜗杆箱,转向齿条的一端端头处设有齿轮齿条间隙自动调整机构,转向齿条箱桶另一端外部的齿条衬套套管内侧与转向齿条之间设有齿条衬套,齿条衬套套管的一端端头外部设有防尘罩,防尘罩的一端与齿条衬套套管的一端外部卡接连接,转向齿条一端端头的转向横拉杆与转向齿条端头之间固定连接,转向齿条末端与转向横拉杆连接处的橡胶防尘罩与齿条紧密贴合,该齿轮齿条式转向器通过将转向器受到的振动通过缓冲装置分散到转向器壳体及调整装置来减小齿轮齿条的磨损进而减小转向时的异响。(The invention discloses a novel rack-and-pinion steering gear with small noise, which comprises a rack-and-pinion steering gear body, wherein a steering rack is arranged on the rack-and-pinion steering gear body, a steering worm box is arranged outside one end of a steering rack box barrel outside the steering rack, an automatic rack-and-pinion clearance adjusting mechanism is arranged at one end head of the steering rack, a rack bushing is arranged between the inner side of a rack bushing sleeve outside the other end of the steering rack box barrel and the steering rack, a dust cover is arranged outside one end head of the rack bushing sleeve, one end of the dust cover is connected with one end outside the rack bushing sleeve in a clamping manner, a steering tie rod at one end head of the steering rack is fixedly connected with the end head of the steering rack, rubber at the joint of the tail end of the steering rack and the steering tie rod is tightly attached to the rack, and the rack-and-pinion steering gear reduces the abrasion of the rack-and pinion through dispersing the vibration received by the steering gear to a steering gear shell and an adjusting device through a buffer device And reduce abnormal noise during steering.)

1. The utility model provides a less novel rack and pinion formula steering gear of noise, includes rack and pinion formula steering gear body (1), its characterized in that: the steering rack type steering gear is characterized in that a steering rack (3) is arranged on the rack and pinion type steering gear body (1), a steering rack box barrel (2) is arranged outside the steering rack box barrel (3), a steering worm box (1) is arranged outside the steering rack box barrel (2) close to one end, a rack clearance automatic adjusting mechanism (22) is arranged outside one end head of the steering rack box barrel (2) and the steering worm box (1), a rack bushing sleeve (4) is arranged outside the steering rack box barrel (2) close to the other end, one end of the rack bushing sleeve (4) is sleeved with one end of the steering rack box barrel (2), a dust cover (8) is arranged at the other end of the rack bushing sleeve (4), one end of the dust cover (8) is buckled with one end head of the rack bushing sleeve (4), a steering tie rod (7) is arranged at one end head of the steering rack (3), the end of the steering rack (3) is matched and installed with the end of one end of the steering tie rod (7);

the outer part of the gear and rack clearance automatic adjusting mechanism (22) is provided with a shell, the inner center of the gear and rack clearance automatic adjusting mechanism (22) is provided with a gear shaft (13), the outer part of the gear shaft close to one end of the gear shaft (13) is provided with a rolling bearing (15), one end head of the gear shaft (13) is provided with a check ring (14) for shaft, the check ring (14) for shaft is arranged at the outer side of the rolling bearing (15), the outer part of the center of the gear shaft (13) is provided with the rolling bearing (11), the outer side of the rolling bearing (11) is provided with a sealing check ring (12) and a gear bearing plug (10), the gear bearing plug (10) is arranged at the outer part of the sealing check ring (12), the outer side of one end of the sealing check ring (12) and the gear bearing plug (10) is provided with a dustproof cover (9), the dustproof cover (9) is mounted with one end head of the shell in a buckling manner, the bottom of the gear shaft (13) close to the center is provided with a rack support (17), an adjusting screw plug (19) is arranged at the bottom of the rack support (17), and a locking nut (20) is arranged outside the adjusting screw plug (19) close to the bottom end.

2. The novel rack and pinion steering gear according to claim 1, wherein: a clamping groove is formed in the end socket of one end of the dust cover (8), and threads are arranged in the center of the outer wall of the dust cover (8).

3. The novel rack and pinion steering gear according to claim 1, wherein: the gear shaft (13) are close to and are equipped with integral type gasket (16) between the bottom of central authorities and rack support (17), and integral type gasket (16) are V type gasket, the both sides surface of integral type gasket (16) all is equipped with anti-skidding sand grip.

4. The novel rack and pinion steering gear according to claim 1, wherein: the center of the bottom of the rack support (17) and the center of the top of the adjusting screw plug (19) are both provided with a ring-opening groove, and the depth of the grooves of the ring-opening grooves of the bottom of the rack support (17) and the top of the adjusting screw plug (19) is 1.8mm, the outer diameter is 27mm, and the inner diameter is 25 mm;

an O-shaped rubber ring is arranged in the circular groove, a honeycomb spring (18) is arranged between the bottom of the rack support (17) and the top of the adjusting screw plug (19), and an included angle between every two adjacent springs of the honeycomb spring (18) is 120 degrees and is connected with a circular node.

5. The novel rack and pinion steering gear according to claim 1, wherein: two annular grooves are formed in the inner side of the steering rack box barrel (2), and sealing rubber sleeves are arranged inside the annular grooves.

6. The novel rack and pinion steering gear according to claim 1, wherein: a rack bushing (5) is arranged between the inside of the rack bushing sleeve (4) and the outside of the steering rack (3), and a steel wire retainer ring (6) is arranged between one end head of the rack bushing (5) and the inner side of one end head of the rack bushing sleeve (4).

7. The novel rack and pinion steering gear according to claim 1, wherein: the rack and pinion steering gear comprises a rack and pinion steering gear body (1), wherein matching connecting rods are arranged at the ends of the two ends of the rack and pinion steering gear body, connecting holes are formed in the ends of the matching connecting rods, and annular bearing rings are arranged in the connecting holes.

Technical Field

The invention relates to the technical field of novel rack and pinion steering gears, in particular to a novel rack and pinion steering gear with low noise.

Background

The rack and pinion steering gear is the most widely used steering gear in the automobile steering system, and is mostly used in small and miniature automobiles due to simple structure, small volume, convenient arrangement and low cost. The rack and pinion steering gear can make a rattle sound when bumping roads, so that the driving experience of a driver is influenced, and the attention of the driver is dispersed.

The current causes of abnormal sound of the rack and pinion steering gear include: the gear with the too large meshing gap of the gear and the rack collides with the rack to generate abnormal sound when rotating, the gap between the rack and the lining is too large after the rack is used for a period of time, the rack inclines to collide with the lining to generate the abnormal sound when moving, the position of a gasket in the automatic adjusting mechanism moves, the stiffness coefficient of a compression spring is insufficient, or the contact area between the spring and a compression plane is small, the pressure distribution is uneven, the sealing performance of the automatic adjusting mechanism is insufficient, and the internal looseness generates sound when being vibrated outside.

At present, most automobile manufacturers adopt a type two-end output type rack-and-pinion steering gear, a steering tie rod is connected with two ends of a steering rack, and in the steering process, because a meshing gap between the steering rack and a pinion shaft is too large, the rack and the pinion collide with each other to generate abnormal sound during fast steering, and the steering is also insensitive.

The gap adjusting mechanism between the traditional gear and the rack compresses a gasket by a compression spring, and the meshing gap between the rack and the gear is adjusted by the gasket, so that the gap is automatically adjusted, the elasticity of springs made of different materials is different, the springs are in a compression state for a long time and are oxidized to a certain degree along with the lengthening of working time, and the elasticity of the springs is also reduced.

Disclosure of Invention

The purpose of the invention is as follows: in order to solve the defects of the existing rack and pinion steering gear during steering, the invention provides the rack and pinion steering gear with low noise.

The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a rack and pinion steering gear that reduces wear of a pinion and a rack and reduces abnormal noise during steering by dispersing vibration received by the steering gear to a steering gear housing and an adjustment device through a damper device.

In order to achieve the purpose, the invention provides the following technical scheme: a novel rack-and-pinion steering gear with low noise, which comprises a rack-and-pinion steering gear body, a steering rack is arranged on the rack and pinion steering gear body, a steering rack box barrel is arranged outside the steering rack, a steering worm box is arranged outside one end of the steering rack box barrel, the outer parts of the end heads at one end of the steering rack box barrel and the steering worm box are provided with a gear rack gap automatic adjusting mechanism, a rack bushing sleeve is arranged on the outer part of the steering rack box barrel close to the other end, one end of the rack bushing sleeve is sleeved with one end of the steering rack box barrel, the other end of the rack bushing sleeve is provided with a dust cover, one end of the dust cover and one end head of the rack bushing sleeve are mutually buckled and mounted, a tie rod is arranged at one end of the steering rack, and the end of the steering rack is matched with the end of one end of the tie rod;

the utility model discloses a gear rack clearance automatic adjustment mechanism, including gear rack clearance automatic adjustment mechanism, gear shaft, bearing plug, sealing ring, dust cover, gear bearing plug, gear shaft, gear rack clearance automatic adjustment mechanism's outside is equipped with the shell, and gear rack clearance automatic adjustment mechanism's inside central authorities are equipped with the gear shaft, and the outside that the gear shaft is close to one end is equipped with antifriction bearing, and the one end department of gear shaft is equipped with the retaining ring for the axle, the retaining ring for the axle sets up in the outside of sealing ring, and the one end outside of sealing ring and gear bearing plug is equipped with the shield, and the shield is installed with the one end lock of shell, the bottom that the gear shaft is close to central authorities is equipped with the rack and supports, and the bottom that the rack supported is equipped with adjusts the plug, the outside that adjusts the plug and be close to the bottom is equipped with lock nut.

Preferably, a clamping groove is formed in the end head of one end of the dust cover, and threads are arranged in the center of the outer wall of the dust cover.

Preferably, an integrated gasket is arranged between the bottom of the gear shaft close to the center and the rack support, the integrated gasket is a V-shaped gasket, and anti-skidding convex strips are arranged on the surfaces of the two sides of the integrated gasket.

Preferably, the center of the bottom of the rack support and the center of the top of the adjusting screw plug are both provided with a circular ring groove, and the depth of the grooves of the circular ring grooves at the bottom of the rack support and the top of the adjusting screw plug is 1.8mm, the outer diameter of the grooves is 27mm, and the inner diameter of the grooves is 25 mm;

an O-shaped rubber ring is arranged inside the circular groove, a honeycomb spring is arranged between the bottom of the rack support and the top of the adjusting screw plug, and an included angle between every two adjacent springs of the honeycomb spring is 120 degrees and is connected with a circular node.

Preferably, two annular grooves are formed in the inner side of the steering rack box barrel, and sealing rubber sleeves are arranged inside the annular grooves.

Preferably, a rack bushing is arranged between the inside of the rack bushing sleeve and the outside of the steering rack, and a steel wire retainer ring is arranged between one end head of the rack bushing and the inner side of one end head of the rack bushing sleeve.

Preferably, the ends of the two ends of the rack and pinion steering gear body are both provided with a matching connecting rod, a connecting hole is formed in the end of the matching connecting rod, and an annular bearing ring is arranged in the connecting hole.

Compared with the prior art, the invention has the beneficial effects that:

(1) an integrated gasket is arranged between the bottom of the gear shaft close to the center and the rack support, the integrated gasket is a V-shaped gasket, anti-skid convex strips are arranged on the surfaces of two sides of the integrated gasket, the gasket is effectively prevented from shifting, and the vibration borne by the steering gear is dispersed to the steering gear shell and the adjusting device through the buffer device to reduce the abrasion of the gear and the rack and further reduce abnormal sound during steering;

(2) the center of the bottom of the rack support and the center of the top of the adjusting screw plug are both provided with a ring opening groove, an O-shaped rubber ring is arranged inside the ring opening groove, two O-shaped rubber rings are added for sealing and buffering, a rubber dust cover at the joint of the tail end of the rack and the steering tie rod is tightly attached to the rack, and the inside of the rubber dust cover is sealed by lubricating grease;

(3) two annular grooves are formed in the inner side of the steering rack box barrel, and a sealing rubber sleeve is arranged inside each annular groove and is fully lubricated by lubricating grease;

(4) two annular grooves are formed in the inner side of the steering rack box barrel, a sealing rubber sleeve is arranged inside the annular grooves, lubricating oil is smeared on the inner side of the sealing rubber sleeve, and the rubber sleeve can further avoid abnormal sound generated by collision of a rack with the steering rack box barrel and a rack bushing sleeve and buffer and absorb shock;

(5) the honeycomb springs are arranged between the bottom of the rack support and the top of the adjusting screw plug, the included angle between every two adjacent springs of the honeycomb springs is 120 degrees and are connected through a circular ring node, the pressure distribution of the automatic adjusting mechanism is more uniform through the honeycomb springs, the elastic modulus and the shear modulus of the honeycomb material can be greatly improved by adjusting the ratio of the wall thickness of the circular ring node to the diameter of the springs on the premise that the relative density is not changed, and the improvement effect of the elastic modulus and the shear modulus is more obvious along with the continuous increase of the ratio;

(6) the gear rack type steering gear disperses the vibration received by the steering gear to the steering gear shell and the adjusting device through the buffer device so as to reduce the abrasion of the pinion and the rack and further reduce abnormal noise during steering.

Drawings

FIG. 1 is a schematic structural view of a rack and pinion steering gear body according to the present invention;

FIG. 2 is a cross-sectional view of the gear rack worm case of the present invention;

fig. 3 is a view of the automatic adjusting mechanism for the gap between the gear and the rack.

In the figure: 1. a steering worm case; 2. a steering rack box barrel; 3. a steering rack; 4. a rack bushing sleeve; 5. a rack bushing; 6. a steel wire retainer ring; 7. a tie rod; 8. a dust cover; 9. a dust cover; 10. a gear bearing plug; 11. a rolling bearing; 12. a sealing retainer ring; 13. a gear shaft; 14. a retainer ring for a shaft; 15. a rolling bearing; 16. an integral gasket; 17. a rack support; 18. a honeycomb spring; 19. adjusting the screw plug; 20. locking the nut; 21. a honeycomb spring mounting groove; 22. a gear rack gap automatic adjusting mechanism; 23. and the rack and pinion steering gear body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a less novel rack and pinion formula steering gear of noise, including rack and pinion steering gear body 1, be equipped with steering rack 3 on the rack and pinion steering gear body 1, steering rack 3's outside is equipped with steering rack case bucket 2, steering rack case bucket 2 is close to the outside of one end and is equipped with steering worm case 1, steering rack case bucket 2, the one end outside of steering worm case 1 is equipped with rack and pinion clearance automatic adjustment mechanism 22, rack and pinion clearance automatic adjustment mechanism 22's outside is equipped with the shell, rack and pinion clearance automatic adjustment mechanism 22's inside central authorities are equipped with pinion shaft 13, be equipped with integral type gasket 16 between the bottom that pinion shaft 13 is close to central authorities and rack support 17, integral type gasket 16 is V type gasket, the both sides surface of integral type gasket 16 all is equipped with anti-skidding sand grip, effectively prevent the gasket aversion, through the vibration that receives with the steering gear disperse to steering gear casing and adjusting device through buffer and reduce the wearing and tearing of rack and then reduce the steering gear Abnormal sound in the forward direction.

The outer portion of the gear shaft close to one end of the gear shaft 13 is provided with a rolling bearing 15, the end of one end of the gear shaft 13 is provided with a shaft retainer ring 14, the shaft retainer ring 14 is arranged on the outer side of the rolling bearing 15, the outer portion of the center of the gear shaft 13 is provided with a rolling bearing 11, the outer side of the rolling bearing 11 is provided with a sealing retainer ring 12 and a gear bearing plug 10, the gear bearing plug 10 is arranged on the outer portion of the sealing retainer ring 12, the outer sides of the sealing retainer ring 12 and one end of the gear bearing plug 10 are provided with a dust cover 9, and the dust cover 9 is mounted with the end of one end of the shell in a buckling mode.

The bottom of the gear shaft 13 close to the center is provided with a rack support 17, the bottom center of the rack support 17 and the top center of the adjusting screw plug 19 are both provided with an annular groove, the groove depth of the annular grooves at the bottom of the rack support 17 and the top of the adjusting screw plug 19 is 1.8mm, the outer diameter is 27mm, the inner diameter is 25mm, an O-shaped rubber ring is arranged inside the annular groove, two O-shaped rubber rings are added for sealing and buffering, a rubber dust cover at the joint of the tail end of the rack and a steering tie rod is tightly attached to the rack, the inside of the rack is sealed by lubricating grease, a honeycomb spring 18 is arranged between the bottom of the rack support 17 and the top of the adjusting screw plug 19, the included angle between every two adjacent springs of the honeycomb spring 18 is 120 degrees and is connected by a ring node, the pressure distribution of the automatic adjusting mechanism is more uniform through the honeycomb spring, and on the premise that the relative density is unchanged, the ratio of the wall thickness of the adjusting ring node and the diameter of the spring can greatly improve the elastic modulus and the shear modulus of the honeycomb material Along with the increasing of the ratio, the improvement effect of the elastic modulus and the shear modulus is more obvious, the bottom of the rack support 17 is provided with an adjusting screw plug 19, the outer part of the adjusting screw plug 19, which is close to the bottom end, is provided with a locking nut 20, and the adjusting screw plug 19 is matched and connected with the shell through the locking nut 20.

Two annular grooves have been seted up to the inboard of steering rack case bucket 2, the inside of annular groove is equipped with the sealing rubber sleeve, lubricating oil is paintd to the sealing rubber sleeve inboard, the rubber sleeve can further avoid inhaling because of rack slope and the abnormal sound and buffering of steering rack case bucket 2 and rack bush sleeve pipe 4 collision production are inhaled and inhale, use lubricating grease fully lubricated, steering rack case bucket 2 is close to the outside of the other end and is equipped with rack bush sleeve pipe 4, be equipped with rack bush 5 between the inside of rack bush sleeve pipe 4 and the outside of steering rack 3, be equipped with steel wire retaining ring 6 between the one end of rack bush 5 and the one end inboard of rack bush sleeve pipe 4.

One end of the rack bushing sleeve 4 is sleeved with one end of the steering rack box barrel 2, a dust cover 8 is arranged at the other end of the rack bushing sleeve 4, a clamping groove is formed in the end head of one end of the dust cover 8, threads are arranged in the central position of the outer wall of the dust cover 8, and one end of the dust cover 8 is buckled with the end head of one end of the rack bushing sleeve 4.

The end socket of one end of the steering rack 3 is provided with a tie rod 7, the end socket of the steering rack 3 is installed in a matched mode with the end socket of one end of the tie rod 7, the end sockets of two ends of the rack and pinion steering gear body 1 are provided with matched connecting rods, connecting holes are formed in the end sockets of the matched connecting rods, and annular bearing rings are arranged in the connecting holes.

The gear rack type steering gear disperses the vibration received by the steering gear to the steering gear shell and the adjusting device through the buffer device so as to reduce the abrasion of the pinion and the rack and further reduce abnormal noise during steering.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.