CN212202963U - A shock absorption and noise reduction device for an output shaft of an automobile steering system - Google Patents

Abstract

The utility model discloses a shock absorption and noise reduction device for an output shaft of an automobile steering system. A spline shaft is installed on the right side of the web, a sleeve is arranged on the right side of the spline shaft, and a spline bump is arranged on the right end of the spline shaft. The spline bump is inserted into the spline groove, and the spline groove is set in the sleeve. At one end of the inner cavity of the tube, the spline shaft and the casing make relative motion, and the connection between the spline shaft and the casing is provided with a shock-absorbing and noise-reducing casing; the shock-absorbing and noise-reducing casing includes a protective casing with a limit hole on the surface , A sound insulation layer and a shock absorbing spring arranged in the protective shell, the protective shell is composed of a sound absorbing plate, the sound insulation layer is wrapped on the outer surface of the spline shaft and the sleeve, and the shock absorbing spring is arranged around the sound insulation layer. The shock absorption and noise reduction device of the output shaft of the automobile steering system has a good shock absorption and noise reduction effect, thereby reducing the vibration of the body, and improving the driving comfort and driving safety.

Description

A shock absorption and noise reduction device for an output shaft of an automobile steering system

technical field

The utility model relates to the technical field of auto parts, in particular to a shock absorption and noise reduction device for an output shaft of an automobile steering system.

Background technique

Automobile steering systems are divided into two categories: mechanical steering systems and power steering systems. Steering systems that are completely controlled by the driver's hand are called mechanical steering systems, and steering systems that rely on power are called power steering systems. Power steering system can be further divided into hydraulic power steering system, electric power steering system, and pneumatic power steering system.

When the steering output shaft of the automobile is working, the relative rotation between the spline shaft and the casing will generate noise and corresponding vibration. The comfort level also affects the driving safety.

Utility model content

(1) Technical problems solved

The utility model provides a shock-absorbing and noise-reducing device for an output shaft of an automobile steering system. A shock-absorbing and noise-reducing casing is provided at the connection between the spline shaft and the sleeve, which effectively reduces and relieves the spline shaft and the sleeve. The noise and vibration generated by the relative rotation between them can reduce the vibration of the body and improve the driving comfort and driving safety.

(2) Technical solutions

In order to solve the above technical problems, the present utility model provides the following technical solutions: a shock absorption and noise reduction device for an output shaft of an automobile steering system, comprising a transmission shaft, a gear is sleeved on the transmission shaft, and a right side of the gear is provided with a gear. Bearing seat, the right side of the bearing seat is installed with a two-sided width, the right side of the double-sided width is installed with a spline shaft, the right end of the spline shaft is provided with a spline bump, and the spline bump is inserted into the spline In the groove, the spline groove is provided at one end of the inner cavity of the casing, the spline shaft and the casing are in relative motion, and the outer casing at the connection between the spline shaft and the casing is provided with a reducer. A shock-absorbing and noise-reducing shell; the shock-absorbing and noise-reducing shell includes a protective shell with a limit hole on the surface, a sound insulation layer corresponding to the position of the limit hole and disposed in the protective shell, and a sound insulation layer disposed in the sound insulation layer A shock-absorbing spring between the protective shell and the protective shell, the protective shell is composed of a sound-absorbing plate, the spline shaft and the sleeve penetrate the limit hole, and the sound insulation layer is wrapped around the spline shaft and the sleeve. On the surface, the damping spring is arranged around the sound insulation layer.

In this way, the shock-absorbing and noise-reducing housing can play a certain role in fixing and protecting the output shaft, and the limit hole can play a certain role in limiting and fixing the spline shaft and the sleeve, reducing the rotation of the spline shaft to a certain extent. The sound insulation layer can effectively isolate the noise generated during the relative rotation between the spline shaft and the casing, reduce the transmission of the sound, and further absorb the noise through the protective shell composed of the sound-absorbing board, so as to achieve Good noise reduction purpose; at the same time, a sound absorption structure similar to cavity resonance is formed between the sound insulation layer and the protective shell, which further improves the noise reduction effect; the shock absorber spring can buffer the vibration generated by the spline shaft when it rotates. In turn, the vibration of the body is reduced, and the driving comfort and driving safety are improved.

It is further provided that the sound insulation layer includes a sound insulation damping felt wrapped around the outer surface of the spline shaft and the sleeve, and a sound insulation board fixedly connected with the shock-absorbing spring and arranged around the outer circumference of the sound insulation and damping felt.

In this way, the sound insulation and damping felt is mainly composed of EPDM. By virtue of the viscoelasticity of EPDM rubber and its unique manufacturing technology, the product has good air-borne sound insulation; because the sound insulation and damping felt is light, ultra-thin, soft, and tensile strength. The big feature is that it is wrapped around the spline shaft and the outer surface of the casing and fits the output shaft, which can play a certain sealing effect and reduce the possibility of dust entering the output shaft from the connection between the spline shaft and the casing. The vibration generated when the key shaft rotates also plays a certain buffering role; at the same time, the double-layer sound insulation structure composed of sound insulation damping felt and sound insulation board can further improve the effect of noise reduction.

It is further provided that the sound insulation board is set as gypsum board.

In this way, the gypsum board has the characteristics of light weight, high strength, thin thickness, convenient processing, sound insulation, heat insulation and fire prevention, does not increase the overall weight of the shock-absorbing and noise-reducing shell too much, and helps to improve the shock absorption and noise reduction. The strength of the noise shell.

It is further arranged that the sound-absorbing board is set as an aluminum honeycomb perforated sound-absorbing board.

In this way, the aluminum honeycomb perforated sound-absorbing panel has the characteristics of high board strength, light weight, good sound absorption effect, fireproof, waterproof and easy installation, which makes the whole shock absorption and noise reduction shell more lightweight, high strength, and good sound absorption effect. Further improve the effect of noise reduction.

It is further arranged that reinforcing ribs are symmetrically arranged on the outer surface of the protective casing away from the spline shaft.

This arrangement further improves the strength of the protective casing and increases the service life of the shock-absorbing and noise-reducing casing.

It is further arranged that the shock-absorbing and noise-reducing shell includes an upper shock-absorbing and noise-reducing shell and a lower shock-absorbing and noise-reducing shell that are equal in size and structure, and the upper shock-absorbing and noise-reducing shell and the lower shock-absorbing and noise-reducing shell are The shock-absorbing and noise-reducing housing is formed after the parts are hoop-connected to the spline shaft and the sleeve.

In this way, the shock-absorbing and noise-reducing shell is configured as an upper shock-absorbing and noise-reducing shell and a lower shock-absorbing and noise-reducing shell connected by a hoop, which facilitates disassembly and installation and improves the usability of the shock-absorbing and noise-reducing shell.

It is further arranged that a mounting bracket is provided on the lower shock-absorbing and noise-reducing shell, and a mounting hole is provided on the mounting bracket.

With this arrangement, the shock-absorbing and noise-reducing housing can be installed and fixed through the mounting holes on the mounting bracket, so that the shock-absorbing and noise-reducing housing is firmer, so that it can better play the role of shock-absorbing and noise-reducing the transmission shaft.

(3) Beneficial effects

Compared with the prior art, the shock absorption and noise reduction device for the output shaft of the automobile steering system provided by the present invention has the following beneficial effects:

The shock-absorbing and noise-reducing housing of the shock-absorbing and noise-reducing device of the output shaft of the automobile steering system can fix and protect the output shaft to a certain extent, and the limit hole has a certain limit-fixing effect on the spline shaft and the sleeve. , to a certain extent, reduce the vibration generated by the spline shaft when it rotates; the double-layer sound insulation structure composed of sound insulation damping felt and gypsum board can effectively isolate the noise generated by the relative rotation between the spline shaft and the casing. It reduces the transmission of sound and has a good noise reduction effect; the protective shell composed of aluminum honeycomb perforated sound-absorbing panels further absorbs noise, and the combination of double-layer sound insulation structure and sound-absorbing panels greatly improves the effect of noise reduction; A sound absorption structure similar to cavity resonance is formed between the sound insulation layer and the protective shell, which further enhances the noise reduction effect; the shock absorption spring can buffer the vibration generated by the rotation of the spline shaft, thereby reducing the vibration of the body and improving the driving and riding. At the same time, the shock-absorbing and noise-reducing shell is light and easy to install and disassemble, which improves the service life of the shock-absorbing and noise-reducing shell.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present utility model;

Fig. 2 is the partial sectional structure schematic diagram of the present utility model;

Figure 3 is a schematic diagram of the overall structure of the shock-absorbing and noise-reducing housing;

FIG. 4 is a schematic cross-sectional structural diagram of a side view of a shock-absorbing and noise-reducing housing.

In the accompanying drawings: 1, transmission shaft; 2, gear; 3, bearing seat; 4, two-sided width; 5, spline shaft; 501, spline bump; 701. Upper shock-absorbing and noise-reducing shell; 702. Lower shock-absorbing and noise-reducing shell 8. Protective shell; 801. Limit hole; 9. Sound insulation layer; 901, Sound insulation and damping felt; 902, Sound insulation board; 10. Shock absorption Spring; 11. Reinforcing rib; 12. Mounting bracket; 1201. Mounting hole.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, wherein, Fig. 1 is a schematic diagram of the overall structure of the present invention, Fig. 2 is a schematic diagram of a partial cross-sectional structure of the present invention, and Fig. 3 is a shock-absorbing and noise-reducing housing Figure 4 is a schematic side-view cross-sectional structure diagram of a shock-absorbing and noise-reducing shell.

The utility model provides a shock absorption and noise reduction device for an output shaft of an automobile steering system, comprising a transmission shaft 1, a gear 2 is sleeved on the transmission shaft 1, a bearing seat 3 is arranged on the right side of the gear 2, and the right side of the bearing seat 3 is provided A double-sided width 4 is installed, a spline shaft 5 is installed on the right side of the double-sided width 4, and a spline bump 501 is arranged at the right end of the spline shaft 5. The spline bump 501 is inserted into the spline groove, and the spline groove is provided with At one end of the inner cavity of the sleeve 6, the spline shaft 5 and the sleeve 6 do relative movement, and the connection between the spline shaft 5 and the sleeve 6 is provided with a shock-absorbing and noise-reducing casing 7; 7 includes a protective shell 8 with a limit hole 801 on the surface, a sound insulation layer 9 corresponding to the position of the limit hole 801 and disposed in the protective shell 8, and a shock-absorbing spring 10 disposed between the sound insulation layer 9 and the protective shell 8, to protect the The shell 8 is composed of a sound-absorbing plate, the spline shaft 5 and the sleeve 6 pass through the limiting hole 801 , the sound insulation layer 9 is wrapped around the outer surface of the spline shaft 5 and the sleeve 6 , and the damping spring 10 is arranged around the sound insulation layer 9 .

The shock-absorbing and noise-reducing housing 7 and the limit hole 801 provided on the surface of the protective shell 8 can limit and fix the output shaft to a certain extent, reducing the vibration generated by the spline shaft 5 when it rotates to a certain extent; the sound insulation layer 9 It can effectively isolate the noise generated by the relative rotation between the spline shaft 5 and the sleeve 6, weaken the transmission of the sound, and further absorb the noise through the protective shell Good noise reduction purpose; a sound absorption structure similar to cavity resonance is formed between the sound insulation layer 9 and the protective shell 8 composed of the sound absorption board, which further improves the effect of noise reduction; the damping spring 10 is arranged along the outer circumference of the sound insulation layer 9, and its One end is welded to the outer surface of the sound insulation layer 9, and the other end is welded to the inner surface of the protective shell 8. When the spline shaft 5 rotates to generate vibration, the shock absorber spring 10 can buffer the generated vibration to achieve the effect of shock absorption. In turn, the vibration of the body is reduced, and the driving comfort and driving safety are improved.

The sound insulation layer 9 includes a sound insulation damping felt 901 wrapped around the outer surfaces of the spline shaft 5 and the sleeve 6 , and a sound insulation board 902 welded with the damping spring 10 and arranged around the outer circumference of the sound insulation and damping felt 901 . The sound insulation board 902 is formed by welding around the outer periphery of the sound insulation damping felt 901, and is fixedly bonded to the sound insulation damping felt 901. The sound insulation and damping felt 901 is mainly composed of EPDM. With the viscoelasticity of EPDM rubber and the unique manufacturing technology, the product has good Because the sound insulation damping felt 901 has the characteristics of light weight, ultra-thin, soft and high tensile strength, it is wrapped on the outer surface of the spline shaft 5 and the sleeve 6, so that the sound insulation damping felt 901 is attached to the output shaft. Combined, it can have a certain sealing effect on the output shaft, reduce the possibility of dust entering the output shaft from the connection between the spline shaft 5 and the sleeve 6, and also play a certain role in the vibration generated by the spline shaft 5 when it rotates. Buffering effect; the sound insulation board 902 can fix the sound insulation damping felt 901, and the double-layer sound insulation structure composed of the sound insulation damping felt 901 and the sound insulation board 902 can further improve the noise reduction effect.

The sound insulating board 902 is a gypsum board. The gypsum board has the characteristics of light weight, high strength, thin thickness, convenient processing, sound insulation, heat insulation and fire prevention. Strength of body 7.

The sound-absorbing panels are set as aluminum honeycomb perforated sound-absorbing panels. The protective shell 8 is welded and formed by aluminum honeycomb perforated sound-absorbing panels. The aluminum honeycomb perforated sound-absorbing panels have the characteristics of high board strength, light weight, good sound absorption effect, fire prevention, waterproofing, and easy installation, which makes the shock-absorbing and noise-reducing shell 7 lighter as a whole. , high strength, and good sound absorption effect, further improving the effect of noise reduction.

Reinforcing ribs 11 are symmetrically welded on the outer surface of the protective casing 8 away from the spline shaft 5 . The strength of the protective casing 8 is improved by the reinforcing ribs 11 , thereby improving the service life of the shock-absorbing and noise-reducing casing 7 .

The shock-absorbing and noise-reducing shell 7 includes an upper shock-absorbing and noise-reducing shell 701 and a lower shock-absorbing and noise-reducing shell 702 that are equal in size and structure. After the hoop is connected to the spline shaft 5 and the sleeve 6, a shock-absorbing and noise-reducing housing 7 is formed, so that the shock-absorbing and noise-reducing housing 7 is easy to disassemble and install, and the usability of the shock-absorbing and noise-reducing housing 7 is improved.

A mounting bracket 12 is welded on the lower shock-absorbing and noise-reducing shell member 702 , and a mounting hole 1201 is provided on the mounting bracket 12 . After the upper shock-absorbing and noise-reducing shell 701 and the lower shock-absorbing and noise-reducing shell 702 are fixedly connected, the shock-absorbing and noise-reducing shell 7 can be installed and fixed through the mounting holes 1201 on the mounting bracket 12, so that the shock-absorbing and noise-reducing shell 7 can be installed and fixed. 7 is more firm, so that it can better play the role of shock absorption and noise reduction of the transmission shaft.

Working principle: The double-layer sound insulation structure composed of the sound insulation damping felt 901 and the sound insulation board 902 can effectively isolate the noise generated during the relative rotation between the spline shaft 5 and the sleeve 6, reduce the transmission of sound, and has better performance. The noise is further absorbed by the protective shell 8 composed of aluminum honeycomb perforated sound-absorbing panels, and the double-layer sound insulation structure and the cooperation of aluminum honeycomb perforated sound-absorbing panels greatly improve the noise reduction effect. A sound-absorbing structure similar to cavity resonance is formed between the protective shell 8 formed by the sound-absorbing board, which further strengthens the noise reduction effect; the sound-insulating damping felt 901 can also play a certain sealing effect, reducing dust from connecting the spline shaft 5 and the sleeve 6 It is possible for the output shaft to enter the output shaft; the shock absorber spring 10 can buffer the vibration generated by the spline shaft 5 when it rotates, thereby reducing the jitter of the vehicle body. Therefore, the shock-absorbing and noise-reducing housing 7 is installed outside the connection between the spline shaft 5 and the sleeve 6, so that the output shaft can achieve better shock-absorbing and noise-reducing effects, thereby improving the comfort of driving and riding. At the same time, the shock-absorbing and noise-reducing shell 7 is lightweight and easy to install and disassemble, which improves the service life of the shock-absorbing and noise-reducing shell 7, and the shock-absorbing and noise-reducing shell 7 is light overall, easy to install and disassemble, and improves the Usability of the shock-absorbing and noise-reducing housing 7 .

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

Claims (7)

1. A shock absorption and noise reduction device for an output shaft of an automobile steering system, comprising a transmission shaft, a gear is sleeved on the transmission shaft, a bearing seat is arranged on the right side of the gear, and two sides are installed on the right side of the bearing seat A spline shaft is installed on the right side of the two-sided web, and a spline bump is arranged at the right end of the spline shaft. The spline bump is inserted into the spline groove, and the spline groove is set in the At one end of the inner cavity of the casing, the spline shaft and the casing perform relative movement, and it is characterized in that a shock-absorbing and noise-reducing casing is provided at the connection between the spline shaft and the casing; The shock-absorbing and noise-reducing shell includes a protective shell with a limit hole on the surface, a sound insulation layer corresponding to the position of the limit hole and disposed in the protective shell, and a shock absorbing layer disposed between the sound insulation layer and the protective shell spring, the protective shell is composed of a sound-absorbing plate, the spline shaft and the sleeve pass through the limit hole, the sound insulation layer is wrapped on the outer surface of the spline shaft and the sleeve, and the shock-absorbing spring surrounds The sound insulation layer is provided. 2 . The shock-absorbing and noise-reducing device for an output shaft of an automobile steering system according to claim 1 , wherein the sound-insulating layer comprises a sound-insulating damping felt wrapped on the outer surface of the spline shaft and the sleeve and A sound-insulating plate fixedly connected with the shock-absorbing spring and arranged around the outer periphery of the sound-insulating damping felt. 3 . The shock-absorbing and noise-reducing device for an output shaft of an automobile steering system according to claim 2 , wherein the sound insulation board is made of gypsum board. 4 . 4 . The shock-absorbing and noise-reducing device for an output shaft of an automobile steering system according to claim 1 , wherein the sound-absorbing panel is an aluminum honeycomb perforated sound-absorbing panel. 5 . 5 . The shock-absorbing and noise-reducing device for an output shaft of an automobile steering system according to claim 1 , wherein reinforcing ribs are symmetrically arranged on the outer surface of the protective casing away from the spline shaft. 6 . 6 . The shock-absorbing and noise-reducing device for an output shaft of an automobile steering system according to claim 5 , wherein the shock-absorbing and noise-reducing shell comprises an upper shock-absorbing and noise-reducing shell with equal size and structure. 7 . and the lower shock-absorbing and noise-reducing shell, the upper shock-absorbing and noise-reducing shell and the lower shock-absorbing and noise-reducing shell are hoop-connected to the spline shaft and the sleeve to form the shock-absorbing and noise-reducing shell . 7 . The shock-absorbing and noise-reducing device for an output shaft of an automobile steering system according to claim 6 , wherein the lower shock-absorbing and noise-reducing shell is provided with a mounting bracket, and the mounting bracket is provided with a mounting bracket. 8 . Mounting holes.

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