Worm mounting and positioning mechanism for automobile electric steering column

Abstract

The utility model discloses a worm installing and positioning mechanism for an automobile electric steering column, and relates to the technical field of automobile part installation, the worm installing and positioning mechanism comprises an automobile electric steering column, a turbine and a base, the outer wall of the turbine is meshed with a worm, the outer wall of the worm is provided with an auxiliary fixing assembly used for fixing the worm, and the worm is provided with a worm gear. The auxiliary fixing assembly comprises a positioning seat, and an angle adjusting assembly used for adjusting the angle of the worm is arranged on the bottom face of the positioning seat. According to the utility model, the angle sensor is arranged to read the initial angle information of the worm in real time, and the initial angle information is compared with the preset standard angle position, so that the angle deviation can be accurately detected. And then the angle of the worm can be effectively adjusted through an angle adjusting assembly composed of an angle adjusting motor, a transmission gear, a steering gear and the like, the preset precision requirement is met, accurate meshing of the worm and the turbine is guaranteed, and then the overall transmission performance and steering precision of the automobile electric steering column are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to automobile parts installation technical field, concretely relates to a kind of worm installation positioning mechanism for automobile electric power steering column. BACKGROUND

[0002] In the automobile electric power steering system, steering column plays a very key role, it is the important component that the steering operation of driver is passed to steering execution mechanism. Among them, the meshing transmission of worm and worm wheel is the core link to realize steering force transmission and steering angle adjustment. With the continuous improvement of the requirement of steering performance in automobile industry, such as steering accuracy, sensitivity and stability, the installation positioning precision of worm becomes increasingly important.

[0003] Traditional worm installation mode often relies on relatively simple mechanical structure and manual operation experience. In the assembly process, lack accurate positioning and detection means, it is difficult to ensure that the initial installation angle of worm completely meets the design requirement. This can cause poor meshing between worm and worm wheel, on the one hand, it will cause low transmission efficiency, increase energy loss, affect the fuel economy of automobile;On the other hand, uneven meshing will also cause vibration and noise, reduce the comfort of driving, and even may accelerate the wear of parts, shorten the service life of steering system, bring potential risk to the safety and reliability of automobile. SUMMARY

[0004] The utility model aims at providing a kind of worm installation positioning mechanism for automobile electric power steering column to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0006] A kind of worm installation positioning mechanism for automobile electric power steering column, including automobile electric power steering column, worm wheel and base, the outer wall of the worm wheel is engaged with worm, the outer wall of the worm is provided with the auxiliary fixing assembly for fixing it;

[0007] The auxiliary fixing assembly includes positioning seat, the bottom surface of the positioning seat is provided with angle adjusting assembly for angle adjustment of worm, the inner wall of the positioning seat is fixedly connected with lower clamping block, the upper surface of the lower clamping block is overlapped with upper clamping block, and the upper surface of the upper clamping block is rotatably connected with adjusting cylinder;

[0008] The bottom surface of the positioning seat is fixedly connected with shaft, the outer wall of the shaft is fixedly connected with steering gear, the outer wall of the steering gear is engaged with transmission gear, the bottom end of the transmission gear is fixedly connected with angle adjusting motor, the bottom end of the shaft is rotatably penetrated to the bottom of base, and the outer wall of the bottom end of the shaft is fixedly connected with angle sensor.

[0009] The further improvement of the utility model technical scheme lies in that: the one end of the adjusting cylinder far from the upper clamping block is rotationally connected with the inner wall top of the positioning seat.

[0010] The further improvement of the utility model technical scheme lies in that: the one end of the adjusting cylinder far from the upper clamping block is rotationally connected with the inner wall top of the positioning seat.

[0011] The further improvement of the utility model technical scheme lies in that: the one end of the adjusting cylinder far from the upper clamping block is rotationally connected with the inner wall top of the positioning seat.

[0012] The further improvement of the utility model technical scheme lies in that: the one end of the adjusting cylinder far from the upper clamping block is rotationally connected with the inner wall top of the positioning seat.

[0013] The further improvement of the utility model technical scheme lies in that: the one end of the adjusting cylinder far from the upper clamping block is rotationally connected with the inner wall top of the positioning seat.

[0014] The further improvement of the utility model technical scheme lies in that: the one end of the adjusting cylinder far from the upper clamping block is rotationally connected with the inner wall top of the positioning seat.

[0015] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0016] The utility model provides a kind of worm installation positioning mechanism for automobile electric power steering column, by setting angle sensor real-time reading initial angle information of worm, and with pre-set standard angle position comparison, angle deviation can be accurately detected. Angle adjustment component, transmission gear and steering gear etc. after using angle adjustment motor, can effectively adjust the angle of worm, so that it reaches the accuracy requirement of pre-setting, guarantees the accurate meshing of worm and worm wheel, and then improves the transmission performance and steering accuracy of automobile electric power steering column as a whole.

[0017] The utility model provides a kind of worm installation positioning mechanism for automobile electric power steering column, and the rubber buffer layer with the hardness of 60-70A is arranged in the inside of lower clamping block and upper clamping block, can be closely combined with the surface of worm when clamping, plays the role of protecting the surface of worm, avoids being pinched, can increase friction force to ensure clamping effect, makes the position of worm stable in installation, debugging etc. stage.And after installation is completed, clamping force can be adjusted as required, both ensure that in normal use, worm is not hindered by excessive holding and rotates, and can rotate freely when needed, enhance the flexibility of mechanism use. DRAWINGS

[0018] Figure 1 It is the structure schematic view of the utility model;

[0019] Figure 2 It is the structure schematic view of the upper clamping block of the utility model;

[0020] Figure 3 It is the structure schematic view of the left view of the utility model;

[0021] Figure 4 It is the structure schematic view of the plan view of the utility model.

[0022] In the figure: 1, automobile electric steering column; 2, worm wheel; 3, positioning seat; 4, base; 5, worm; 6, lower clamping block; 7, upper clamping block; 8, adjusting cylinder; 9, positioning block; 10, frame rod; 11, drive motor; 12, steering gear; 13, angle sensor; 14, disc brake; 15, transmission gear; 16, angle adjusting motor; 17, dovetail groove; 18, adaptive clamping block. DETAILED DESCRIPTION

[0023] In the description of the utility model, it also needs to be explained that, unless there is explicit provision and limitation, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, can be detachably connected or integrally connected, can be mechanically connected or electrically connected, can be directly connected or indirectly connected through intermediate medium, and can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0024] The utility model will be further described in detail in combination with examples as follows: Example 1

[0025] As Figures 1-4 Indicated, the utility model provides a kind of worm installation positioning mechanism for automobile electric steering column, including automobile electric steering column 1, worm wheel 2 and base 4, the outer wall of worm wheel 2 is engaged with worm 5, the outer wall of worm 5 is provided with auxiliary fixing assembly for fixing it;

[0026] Auxiliary fixing assembly includes positioning seat 3, the bottom surface of positioning seat 3 is provided with angle adjusting assembly for the angle adjustment of worm 5, the inner wall of positioning seat 3 is fixedly connected with lower clamping block 6, the upper surface of lower clamping block 6 is overlapped with upper clamping block 7, and the upper surface of upper clamping block 7 is rotatably connected with adjusting cylinder 8;

[0027] The bottom surface of the positioning seat 3 is fixedly connected with a shaft rod, the outer wall of the shaft rod is fixedly connected with a steering gear 12, the outer wall of the steering gear 12 is engaged with a transmission gear 15, the bottom end of the transmission gear 15 is fixedly connected with an angle adjusting motor 16, the bottom end of the shaft rod is rotatably penetrated to the bottom of the base 4, and the outer wall of the bottom end of the shaft rod is fixedly connected with an angle sensor 13.

[0028] One side of the upper clamping block 7 is rotatably connected with the inner wall of the positioning seat 3. This rotatable connection can make the upper clamping block 7 flexibly cooperate with the lower clamping block 6 to clamp the worm 5 under the drive of the adjusting cylinder 8, and can adapt to worm 5 of different diameters or shapes. At the same time, through this rotatable connection, it can be guaranteed that when the worm 5 is clamped, the clamping force is uniformly distributed on the contact surface of the upper clamping block 7 and the lower clamping block 6 and the worm 5, avoiding excessive local pressure from damaging the worm 5. Embodiment 2

[0029] As shown in the drawings, Figures 1-4 Preferably, one end of the positioning seat 3 is fixedly connected with a positioning block 9, one side of the positioning block 9 is provided with a groove, and the inner wall of the groove is overlapped with one end of the worm 5.

[0030] One end of the worm 5 is drivingly connected with a driving motor 11 through an elastic coupling.

[0031] One side of the positioning seat 3 away from the worm gear 2 is fixedly connected with an adaptive clamping block 18, one side of the base 4 close to the positioning seat 3 is provided with a dovetail groove 17, and the outer wall of the adaptive clamping block 18 is movably inserted into the inner wall of the dovetail groove 17.

[0032] The bottom surface of the lower clamping block 6 is fixedly connected with a bracket rod 10, and one side of the steering gear 12 is provided with a disc brake 14 for braking.

[0033] The working principle of the worm installation and positioning mechanism for the automobile electric power steering column will be described below.

[0034] As shown in the drawings, Figures 1-4 When in use, one end of the worm 5 is placed into the groove of the positioning block 9, and then the adjusting cylinder 8 is started. The upper clamping block 7 will cooperate with the lower clamping block 6 to clamp the worm 5 under the drive of the adjusting cylinder 8, and the two ends of the worm 5 are provided with the lower clamping block 6 and the upper clamping block 7.

[0035] Then the angle sensor 13 is powered on and starts, and the initial angle information of the worm 5 is read in real time. By comparing with the pre-set standard angle position, the angle deviation is calculated.

[0036] The detected deviation data is then transmitted to an external controller, which controls the starting angle adjustment motor 16 to rotate the steering gear 12 through the transmission gear 15, and the steering gear 12 rotates the positioning seat 3, so as to adjust the angle of the worm 5, so that the installation angle of the worm 5 reaches the preset accuracy requirement. For example, if the angle of the worm 5 is 0° in the standard position, and the initial angle read by the angle sensor 13 is 5°, it can be determined that the worm 5 has an angle deviation of 5°.

[0037] When the angle adjustment of the worm 5 is completed, the disc brake 14 is started to block the steering gear 12 through the brake pad, so as to prevent the rotation of the steering gear 12, thereby achieving the locking of the angle.

[0038] The elastic coupling can transmit torque while allowing a certain degree of axial, radial and angular displacement, compensating for possible installation errors between the motor shaft and the worm 5.

[0039] Finally, the positioning mechanism with the installed worm 5 is moved to the assembly position of the automobile electric power steering column 1, and the worm 5 is connected and installed with the worm wheel 2. At this time, the base 4 is fixed, thereby completing the installation of the worm 5.

[0040] The adapter block 18 moves in the dovetail groove 17 during the rotation of the positioning seat 3, and the internal space gap of the dovetail groove 17 is sufficient for the adapter block 18 to adjust to a certain extent.

[0041] The inner side of the lower clamping block 6 and the upper clamping block 7 has a rubber buffer layer with a Shore hardness of 60-70A. This relatively soft rubber layer can closely fit the surface of the worm 5 during clamping, which not only protects the surface of the worm 5, but also increases the friction to ensure the clamping effect.

[0042] When the worm 5 needs to rotate, for example during debugging or normal use of the automobile steering system, the clamping force formed by the lower clamping block 6 and the upper clamping block 7 can be adjusted. After installation is completed, the clamping force can be appropriately reduced, so that the worm 5 can freely rotate when needed. Moreover, the rubber buffer layer provides sufficient friction for clamping, without generating excessive clamping force to hinder the normal rotation of the worm 5.

[0043] The above has made a detailed description of the general utility model, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, without departing from the modification or improvement of the spirit of the utility model, it is within the protection scope of the utility model.

Claims

1. A worm gear mounting and positioning mechanism for an electric steering column of an automobile, comprising an electric steering column of an automobile (1), a worm gear (2) and a base (4), characterized in that: A worm (5) is meshed with the outer wall of the worm wheel (2), and an auxiliary fixing component for fixing the worm (5) is provided on the outer wall of the worm wheel (5); The auxiliary fixing assembly comprises a positioning seat (3), the bottom surface of the positioning seat (3) is provided with an angle adjustment assembly for adjusting the angle of the worm (5), the inner wall of the positioning seat (3) is fixedly connected to a lower clamping block (6), the upper surface of the lower clamping block (6) is overlapped with an upper clamping block (7), and the upper surface of the upper clamping block (7) is rotatably connected to an adjustment cylinder (8); The bottom surface of the positioning seat (3) is fixedly connected to a shaft, the outer wall of the shaft is fixedly connected to a steering gear (12), the outer wall of the steering gear (12) is meshed with a transmission gear (15), the bottom end of the transmission gear (15) is fixedly connected to an angle adjustment motor (16), the bottom end of the shaft rotates and penetrates to the bottom of the base (4), and the outer wall of the shaft near the bottom end is fixedly connected to an angle sensor (13).

2. The worm gear installation and positioning mechanism for an automotive electric steering column according to claim 1, characterized in that: One end of the regulating cylinder (8) away from the upper clamping block (7) is rotatably connected to the top of the inner wall of the positioning seat (3).

3. The worm gear installation and positioning mechanism for an automotive electric steering column according to claim 1, characterized in that: One side of the upper clamping block (7) is rotatably connected to the inner wall of the positioning seat (3).

4. The worm gear installation and positioning mechanism for an automotive electric steering column according to claim 1, characterized in that: One end of the positioning seat (3) is fixedly connected to a positioning block (9), and a groove is provided on one side of the positioning block (9), and the inner wall of the groove overlaps with one end of the worm (5).

5. The worm gear installation and positioning mechanism for an electric steering column of an automobile according to claim 1, characterized in that: One end of the worm (5) is connected to a drive motor (11) via an elastic coupling.

6. The worm gear installation and positioning mechanism for an automotive electric steering column according to claim 1, characterized in that: An adapter block (18) is fixedly connected to the side of the positioning seat (3) away from the worm gear (2), and a dovetail groove (17) is provided on the side of the base (4) close to the positioning seat (3), and the outer wall of the adapter block (18) is movably plugged into the inner wall of the dovetail groove (17).

7. The worm gear installation and positioning mechanism for an automotive electric steering column according to claim 1, characterized in that: The bottom surface of the lower clamping block (6) is fixedly connected to a frame rod (10), and a disc brake (14) for braking the steering gear (12) is provided on one side of the steering gear (12).

Images