CN212950809U

CN212950809U - Rack shell for automobile electric rib power steering system

Info

Publication number: CN212950809U
Application number: CN202021962140.4U
Authority: CN
Inventors: 毛权东; 毛权文
Original assignee: Ruian Yuxi Steering Device Co ltd
Current assignee: Ruian Yuxi Steering Device Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-04-13
Anticipated expiration: 2030-09-09

Abstract

The utility model relates to a rack housing for among electronic rib power steering system of car, which comprises a housin, be equipped with the rack passageway on the casing, rack passageway fit in is provided with bush mechanism, bush mechanism is including the same and first bush and the second bush that are the symmetry setting of shape, at least two and corresponding spread grooves have all been opened on the lateral wall of first bush and second bush, the spread groove internal fixation is equipped with the elastic connection spare that is used for connecting first bush and second bush, all be equipped with a plurality of interior shock pad on the inside wall of first bush and second bush, all be equipped with the locating piece on the outer end of first bush and second bush, it is used for the constant head tank with locating piece matched with to open on the rack passageway, the constant head tank is the arc form, the utility model discloses first bush has the noise reduction with the second bush when the wheel receives external force to strike, The effect of damping can reduce wearing and tearing, prevents to damage the rack, fully guarantees product life.

Description

Rack shell for automobile electric rib power steering system

Technical Field

The utility model relates to an auto-parts technical field, especially a rack housing that is arranged in auto electric rib power steering system.

Background

The electric rib power steering system of the automobile is a power assisting device capable of reducing the fatigue strength of a driver, and can effectively improve the portability and the stability of operation.

The electric rib power steering system of the automobile detects a torque signal or an EPS monitoring corner signal through a torque sensor, then sends the signal to a control unit, the control unit determines how much power is provided by a motor according to the obtained torque signal and a vehicle speed signal and according to a power curve calibrated in advance, the torque provided by the motor is amplified by a reduction gear and is transmitted to a pinion, the torque provided by a driver and the torque provided by the motor are transmitted to a rack through the pinion, the rack moves transversely to realize steering, a rack shell is arranged outside the rack in the prior art, a certain gap is formed between the rack and the rack shell, a protection structure for the rack is absent, the rack can be damaged when wheels are impacted by external force, the rack is seriously deformed, and the service life of a product is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rack housing for among electronic rib power steering system of car, including first bush and second bush in its casing, first bush has the effect of making an uproar, damping with the second bush when the wheel receives external force impact, can reduce wear, prevent to damage the rack, fully guarantees product life, has solved the above-mentioned problem that exists among the prior art in the use.

The technical scheme of the utility model is realized like this: the utility model provides a rack housing for among electronic rib power steering system of car, includes the casing, be equipped with rack passageway, steering wheel steering input shaft passageway and motor helping hand input shaft passageway on the casing, rack passageway fit in is provided with bush mechanism, bush mechanism is including the same and first bush and the second bush that are the symmetry and set up of shape, all open at least two and corresponding spread groove on the lateral wall of first bush and second bush, the spread groove internal fixation is equipped with the elastic connection spare who is used for connecting first bush and second bush, all be equipped with shock pad in a plurality of on the inside wall of first bush and second bush, all be equipped with the locating piece on the outer end of first bush and second bush, it has the constant head tank that is used for with locating piece matched with to open on the rack passageway, the constant head tank is the arc form.

Preferably, the side walls of the first bushing and the second bushing are both provided with bushing notches penetrating through two ends of the first bushing and the second bushing.

Preferably, the bushing gap occupies between 0.15 and 0.2 of the total area of the first bushing and the second bushing.

Preferably, the first bush and the second bush are provided with at least three groups of spring fixing seats on positions of two sides of the bush notch, the spring fixing seats are fixedly connected with springs, and the springs are arranged on the bush notch.

Preferably, the inner shock pad is of a structure that one end is thin and then becomes thick gradually towards the other end, the thin end of the inner shock pad is arranged at the inner ends of the first bushing and the second bushing, and the thick end of the inner shock pad is arranged at the outer ends of the first bushing and the second bushing.

Preferably, the end, thick on the inner shock absorber, is provided with an easy-to-enter chamfer.

Preferably, a plurality of outer shock absorption pads are arranged on the outer side walls of the first bushing and the second bushing.

Preferably, the first and second bushings are both made of a steel alloy.

To sum up, the beneficial effects of the utility model reside in that:

1. the utility model discloses a cooperation is provided with bush mechanism and protects the rack in rack passageway, bush mechanism is the same and be first bush and the second bush that the symmetry set up including the shape, all be equipped with shock pad in a plurality of on the inside wall of first bush and second bush, interior shock pad can be when the wheel receives external force and assaults, play to fall the noise to the rack, the effect of damping, can reduce wear, prevent to damage the rack, in addition, first bush is connected through elastic connection spare with the second bush, and the locating piece cooperation on first bush and the second bush is in the constant head tank that is the arc form, this structure is when the rack vibrates, first bush can produce an amount of skew with the second bush after offsetting with the rack, thereby the effectual vibrations that mitigate and offset the rack, the life of rack has fully been guaranteed.

2. The bushing notches on the first and second bushings can reduce the coefficient of friction of the rack on the first and second bushings. And the spring of connection on bush breach both sides can prevent that first bush and second bush from carrying out the damping work after a period of time to the rack, thereby the bush breach becomes bigger and leads to first bush and second bush to warp.

3. Interior shock pad is one end thin then to the structure of the other end thickening gradually to interior shock pad thin one end all sets up on the inner end of first bush and second bush, and thick one end all sets up on the outer of first bush and second bush, and this structure can reduce the coefficient of friction of rack on first bush and second bush, when the rack vibrates or squints in addition, all can have interior shock pad on first bush or the second bush to carry out effectual support shock attenuation to the rack. The easy-to-enter chamfer on the inner shock pad can facilitate the entry of the rack when the rack is installed.

4. The outer shock pad can reduce the vibration of the first bushing and the second bushing on the shell, and protect the structures of the first bushing and the second bushing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall structure of FIG. 1 from another perspective;

FIG. 3 is a schematic view of a first bushing;

FIG. 4 is a schematic view of a second bushing;

FIG. 5 is a schematic view of the first bushing in connection with the second bushing;

fig. 6 is a schematic structural diagram of fig. 5 at another viewing angle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1 to 6 of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

As shown in fig. 1 to 6, the utility model discloses a rack housing used in an automobile electric rib power steering system, which comprises a housing 1, wherein the housing 1 is provided with a rack channel 2, a steering wheel steering input shaft channel 3 and a motor power-assisted input shaft channel 4, the rack channel 2 is used for a rack to pass through, the steering wheel steering input shaft channel 3 is used for a steering wheel steering input shaft to enter, the motor power-assisted input shaft channel 4 is used for a motor power-assisted input shaft to enter, a bush mechanism is arranged in the rack channel 2 in a matching way, the bush mechanism covers the rack, the bush mechanism comprises a first bush 5 and a second bush 6 which are same in shape and are symmetrically arranged, at least two and corresponding connecting grooves 7 are arranged on the outer side walls of the first bush 5 and the second bush 6, an elastic connecting piece 8 used for connecting the first bush 5 and the second bush 6 is fixedly arranged in the connecting grooves 7, all be equipped with shock pad 9 in a plurality of on the inside wall of first bush 5 and second bush 6, all be equipped with locating piece 10 on the outer end of first bush 5 and second bush 6, it is used for and locating piece 10 matched with constant head tank 11 to open on the rack passageway 2, constant head tank 11 is the arc form, when the wheel receives external force impact rack to vibrate, interior shock pad 9 can play the effect of making an uproar, damping to the rack, can reduce wear, prevent to damage the rack to first bush 5 and second bush 6 can produce a certain amount of skew after offsetting with the rack, thereby the effectual vibration that alleviates and offset the rack, fully guaranteed the life of rack.

In the utility model, the side walls of the first bush 5 and the second bush 6 are both provided with bush notches 12 which penetrate through the two ends of the first bush 5 and the second bush 6, the bush notches 12 account for 0.15-0.2 of the total area of the first bush 5 and the second bush 6, the bush notches 12 can reduce the friction coefficient of the rack on the first bush 5 and the second bush 6,

wherein, in order to prevent bush breach 12 grow to lead to first bush 5 and second bush 6 can not comparatively inseparable cover to establish on the rack, so first bush 5 and second bush 6 all are equipped with the spring fixing base 13 of at least three groups on the both sides position of bush breach 12, fixedly connected with spring 14 on the spring fixing base 13, spring 14 sets up on bush breach 12.

The utility model discloses in, interior shock pad 9 is the structure that one end is thin then thicken gradually to the other end, thin one end all sets up on the inner of first bush 5 and second bush 6 on interior shock pad, the one end that goes up thick on interior shock pad 9 all sets up on the outer of first bush 5 and second bush 6, and this structure can reduce the coefficient of friction of rack on first bush 5 and second bush 6, when the rack vibrates or squints in addition, all can have interior shock pad 9 on first bush 5 or the second bush 6 to carry out effectual support shock attenuation to the rack.

Wherein, the thick end on the interior shock pad 9 is equipped with easily goes into chamfer 15 to when the installation rack, make things convenient for the rack to get into.

The utility model discloses in, all be equipped with the outer shock pad 16 of a plurality of on the lateral wall of first bush 5 and second bush 6, outer shock pad 16 can reduce the vibration of first bush 5 and second bush 6 on casing 1, protects the structure of first bush 5 and second bush 6.

In the present invention, the first bushing 5 and the second bushing 6 are made of steel alloy, and the structure is reliable.

The utility model that should point out simultaneously indicates the terminology, like: the directional or positional relationships indicated as "front", "rear", "vertical", "horizontal", etc. are based on the directional or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the invention.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rack housing for use in an automotive electric rib power steering system, comprising a housing (1), characterized in that: the steering wheel steering input shaft structure is characterized in that a rack channel (2), a steering wheel steering input shaft channel (3) and a motor power-assisted input shaft channel (4) are arranged on the shell (1), a bushing mechanism is arranged in the rack channel (2) in a matched mode and comprises a first bushing (5) and a second bushing (6) which are identical in shape and symmetrically arranged, at least two corresponding connecting grooves (7) are formed in the outer side walls of the first bushing (5) and the second bushing (6), an elastic connecting piece (8) used for connecting the first bushing (5) and the second bushing (6) is fixedly arranged in each connecting groove (7), a plurality of inner shock absorption pads (9) are arranged on the inner side walls of the first bushing (5) and the second bushing (6), positioning blocks (10) are arranged on the outer ends of the first bushing (5) and the second bushing (6), and positioning grooves (11) matched with the positioning blocks (10) are formed in the rack channel (2), the positioning groove (11) is arc-shaped.

2. The rack housing for use in an automotive electric rib power steering system according to claim 1, wherein: the side walls of the first bush (5) and the second bush (6) are respectively provided with a bush notch (12) which penetrates through the two ends of the first bush and the second bush.

3. The rack housing for use in an automotive electric rib power steering system according to claim 2, wherein: the bush notch (12) occupies 0.15-0.2 of the total area of the first bush (5) and the second bush (6).

4. A rack housing for use in an automotive electric rib power steering system according to claim 3 wherein: first bush (5) and second bush (6) all are equipped with spring fixing base (13) of at least three groups on the both sides position of bush breach (12), fixedly connected with spring (14) on spring fixing base (13), spring (14) set up on bush breach (12).

5. The rack housing for use in an automotive electric rib power steering system according to claim 1, wherein: interior shock pad (9) are the structure that one end is thin then thicken gradually to the other end, interior shock pad (9) are gone up thin one end and all are set up on the inner of first bush (5) and second bush (6), interior shock pad (9) are gone up thick one end and all are set up on the outer end of first bush (5) and second bush (6).

6. The rack housing for use in an automotive electric rib power steering system according to claim 5, wherein: an easy-to-enter chamfer (15) is arranged at the thick end of the inner shock pad (9).

7. The rack housing for use in an automotive electric rib power steering system according to claim 1, wherein: and a plurality of outer shock absorption pads (16) are arranged on the outer side walls of the first bushing (5) and the second bushing (6).

8. The rack housing for use in an automotive electric rib power steering system according to claim 1, wherein: the first bushing (5) and the second bushing (6) are both made of a steel alloy.