Steering column cam mechanism

Abstract

The utility model relates to a steering column cam mechanism. The steering column cam mechanism is used for reducing impact noise generated by interference between a cam lever and a cam stop piece when the steering column lever is unlocked. The steering wheel adjusting device comprises a lever component (100) which rotates by taking an inclined bolt (12) as a center and is used for adjusting inclination or stretching of a steering wheel; a cam lever (201) and a cam stopper (202) which are axially coupled to the tilt bolt (12) and cam-activated according to the rotation of the lever member (100); and an elastic member (300) that is elastically supported between the cam lever (201) and the cam stopper (202) and that provides elastic resistance in accordance with the rotation of the lever member (100).

Description

Technical Field

[0001] The utility model relates to a steering column cam mechanism, which is used for reducing the impact noise generated by the interference between a cam lever and a cam stopper when the steering column lever is unlocked and started. Background Art

[0002] Generally, a steering device is a device for arbitrarily changing the direction of travel of a vehicle, and there is a power steering device that uses a mechanical steering device and oil pressure to reduce the steering operation force.

[0003] Most of the recent vehicles are equipped with power steering systems, and representative types of power steering systems include hydraulic and electric types.

[0004] Among them, the hydraulic type has steering operating components such as a steering wheel and steering column for transmitting the driver's operating force, as well as a steering gear box and linkage mechanism that transmit the movement of the steering wheel to the left and right front wheels while maintaining a specified relationship between the left and right front wheels.

[0005] On the other hand, the steering column has a tilt function and a telescopic function. The tilt function allows the driver to use the tilt lever to lock or unlock the steering column, move the steering wheel up and down a specified angle to adjust to a convenient driving posture and fix it. The telescopic function allows the driver to pull out or retract the steering wheel from the steering shaft to adjust the driver's seat space.

[0006] However, when the lever is released and activated, the conventional steering column has the problem of activation noise generated between components due to the activation force and interference of the lever caused by the activation mechanism of the cam stop and the cam lever.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Korean Patent Gazette No. 10-2261543 (Grant Date: June 1, 2021) Utility Model Content

[0010] Technical issues

[0011] The purpose of the utility model is to solve the existing problem. During the disengagement process caused by the release of the steering column lever, a spring is provided between the cam lever and the cam stopper, and the spring provides elastic resistance in the opposite direction of the lever rotation to reduce the interference noise between the cam stopper and the cam lever.

[0012] Technical Solution

[0013] The utility model provides a steering column cam mechanism for achieving this purpose, which is characterized by including: a lever component that rotates around a tilt bolt and is used to adjust the tilt or extension of the steering wheel; a cam lever and a cam stopper that are combined with the above-mentioned tilt bolt shaft and are activated according to the rotation of the above-mentioned lever component; and an elastic component that is elastically supported between the above-mentioned cam lever and the cam stopper and provides elastic resistance according to the rotation of the lever component.

[0014] Effect of utility model

[0015] According to the present invention, during the unlocking process caused by releasing the steering column lever, elastic resistance is provided between the cam lever and the cam stopper in the direction opposite to the rotation, thereby having the effect of reducing interference noise between the cam stopper and the cam lever. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of a steering column cam mechanism according to an embodiment of the present invention.

[0017] Figure 2 for Figure 1 Exploded three-dimensional diagram.

[0018] Figure 3(a) and Figure 3(b) are Figure 1 The main parts of the combined diagram.

[0019] Figures 4 and 5 This is a diagram of the steering column cam mechanism of the present invention in the starting state.

[0020] Description of Reference Signs

[0021] 1: Cam mechanism 10: Steering column

[0022] 11: Mounting bracket 12: Tilt bolt

[0023] 100: Lever component 201: Cam lever

[0024] 202: Cam stopper 210: First groove portion

[0025] 220: Second groove portion

[0026] 300: Elastic member 310: First end portion

[0027] 320: Second end portion 330: Coil portion DETAILED DESCRIPTION

[0028] The features of the steering column cam mechanism of the present invention can be understood through the embodiments described in detail below with reference to the accompanying drawings.

[0029] On the other hand, the embodiments of the present invention can be implemented in various implementations within the technical scope of the present invention, and in particular, are not limited to the embodiments described herein.

[0030] Moreover, in order to clearly illustrate the present invention, repeated descriptions of overall identical or similar structural elements will be omitted in the specification, and parts irrelevant to the description of the drawings will be omitted in the drawings. When describing common structural elements, their figure marks will be omitted.

[0031] Below, we will refer to Figures 1 to 3(a) 3( b ) and FIG. 3( b ) illustrate in detail the steering column cam mechanism according to an embodiment of the present invention.

[0032] The steering column cam mechanism 1 of the present invention includes: a lever component 100, which rotates around a tilt bolt 12 and is used to adjust the tilt or extension of the steering wheel; a cam lever 201 and a cam stopper 202, which are axially coupled to the tilt bolt 12 and are actuated according to the rotation of the lever component 100; and an elastic component 300, which is elastically supported between the cam lever 201 and the cam stopper 202 and provides elastic resistance according to the rotation of the lever component 100.

[0033] Hereinafter, each of the above structures will be described in detail.

[0034] First, the lever component 100 is the part operated by the user and is used to adjust the tilt or extension of the steering wheel. The lever component 100 is combined and fixed with the end shaft of the tilt bolt 12. The above-mentioned tilt bolt 12 passes through and protrudes from the side of the mounting bracket 11 of the steering column 10. Depending on the rotation direction of the lever component 100, the lever is in an unlocked or locked state.

[0035] In this case, a cam lever 201 and a cam stopper 202 are combined on the inner side of the lever component 100. In essence, the lever component 100 guides the cam to start by rotating the cam lever 201. According to the cam start, the tilt-movement gear assembly provided in the steering column 10 is started, thereby realizing functional adjustment such as the tilt of the steering wheel.

[0036] The cam lever 201 and the cam stopper 202 are respectively coupled to the tilt bolt 12 from the inner side of the lever member 100 , and guide the lever to an unlocked or locked state by engaging or disengaging the cams with each other according to the rotation of the lever member 100 .

[0037] On the other hand, the cam lever 201 and the cam stopper 202 are axially coupled to the lever member 100, the cam lever 201 and the cam stopper 202 in sequence by means of the tilting bolt 12 from the side of the mounting bracket 11 of the steering column 10. Grooves having protruding flat surfaces and inclined surfaces are radially formed on the opposing surfaces of the cam lever 201 and the cam stopper 202, respectively, so that the cam lever 201 and the cam stopper 202 engage with or disengage from each other according to the rotation of the lever member 100, thereby performing a cam actuation that converts rotational motion into linear motion.

[0038] In this case, the cam lever 201 is an accessory that rotates according to the activation of the lever component 100, and the cam stopper 202 is an accessory fixed to the side of the mounting bracket 11, so that the linear motion force acts in a manner proportional to the distance that the cam lever 201 engages or separates with the cam stopper 202 according to the rotation of the lever component 100.

[0039] In this case, the linear motion force generated by the cam activation of the cam lever 201 and the cam stopper 202 causes the tilt-movement gear assembly of the steering column 10 to engage or disengage, thereby achieving the locking or releasing action of the lever component 100 for the tilt or telescopic function of the steering wheel.

[0040] The lever component 100 , the cam lever 201 and the cam stopper 202 are usually implemented in the steering column in various forms. Without departing from the scope of easy implementation of the present invention, these structures can adopt various forms and are not particularly limited thereto.

[0041] Furthermore, the elastic member 300 is elastically supported between the cam lever 201 and the cam stopper 202 , and transmits elastic resistance in the opposite direction of the rotation of the lever member 100 according to the rotation of the lever member 100 .

[0042] In more detail, in the existing steering column, when the lever is disengaged and started, the starting force and interference of the lever component 100 caused by the starting mechanism of the cam lever 201 and the cam stopper 202 generate starting noise between the accessories, but the elastic component 300 provides elastic resistance in the opposite direction of rotation between the cam lever 201 and the cam stopper 202, thereby buffering the starting force of the lever component 100.

[0043] Among them, the elastic component 300 is located at the other end of the first end 310 and the second end 320 connected to the cam lever 201. The above-mentioned elastic component 300 is composed of a torsion coil spring forming the second end 320 connected to the cam stopper 202. A first groove portion 210 for inserting the first end 310 is formed in the cam lever 201, and a second groove portion 220 for inserting the second end 320 is formed in the cam stopper 202. A coil portion 330 for applying elasticity is formed between the first end 310 and the second end 320.

[0044] In this case, as for the coil portion 330 , if the cam lever 201 and the cam stopper 202 are engaged with each other, the coil portion 330 will be wound inward to apply elastic force.

[0045] The elastic force of the coil portion 330 should be set to a maximum level of 70% to 80% in the axial and rotational directions generated by the gear compression spring of the tilt-moving gear assembly, so that the tilt-moving gear assembly can be easily engaged and disengaged. Therefore, the elastic force of the coil portion 330 needs to be adjusted.

[0046] In this case, the two ends of the elastic component 300 are connected to the cam lever 201 and the cam stopper 202 through the first end 310 and the second end 320 respectively. When the cam lever 201 serving as the flow side rotates, the torsion coil spring will apply a load in the opposite direction of rotation. When the load releases the lever component 100, resistance is applied in the disengagement direction, thereby slowing down the rotation speed. According to the speed reduction, the impact force is buffered at the cam starting part, thereby reducing the starting noise.

[0047] Moreover, the coil portion 330 is wound around the outer periphery of the cam stopper 202 and is supported. Due to the support structure of the coil portion 330 and the cam stopper 202, there is no need for a structure for supporting the elastic component 300. By combining the elastic component 300 with the cam stopper 202, the structure is simplified, and the manufacture of the cam lever 201 and the cam stopper 202 using the elastic component 300 is simplified.

[0048] Below, we will refer to Figures 4 and 5 The activation state of the steering column cam mechanism of the present invention will be described.

[0049] Thus, the automobile steering device is equipped with a tilt device for performing the tilt or telescopic function of the steering wheel, and the tilt device includes: a mounting bracket 11 for supporting the steering column 10; and a lever component 100, which is axially coupled to a tilt bolt 12 that passes through the mounting bracket and the steering column. A cam mechanism consisting of a cam lever 201 and a cam stopper 202 is provided between the lever component 100 and the mounting bracket, and a tilt-moving gear assembly is assembled on the other side of the lever component 100. During the cam start-up process based on the operation of the lever component 100, the gears of the tilt-moving gear assembly are selectively engaged, thereby implementing the locking or releasing action of the lever, thereby realizing the adjustment of the tilt or telescopic function of the steering column.

[0050] For example, when the driver activates the lever component 100 to perform the tilt or telescopic function of the steering wheel, the steering wheel will enter a locked state or a released state, and the state in which the grooves between the cam lever 201 and the cam stopper 202 are engaged and inserted with each other corresponds to the released state of the lever component 100.

[0051] In this case, the lever member 100 is released and returns to its original position according to the displacement in the locked state of the lever member 100 , and the gear meshing of the tilt-movement gear assembly is released, thereby enabling the tilt or telescopic function to be performed.

[0052] in, Figure 4 The cam mechanism 1 is shown in a locked state of the lever member 100 . In this state, the cam lever 201 is not rotating, that is, the cam lever 201 does not press the elastic member 300 in the winding direction of the coil portion 330 , and is in a state without resistance.

[0053] Figure 5 In order to release the state of the steering column tilt and telescopic function by rotating the lever component 100 in the locked state, the cam lever 201 coaxially connected to the tilt bolt 12 is also rotated by the rotation of the lever component 100. In more detail, the first end 310 of the elastic component 300 is pressurized according to the rotation of the cam lever 201, so that the coil portion 330 is wound inward to apply an elastic force, and an elastic resistance proportional to the elastic force is applied in the opposite direction of the rotation of the lever component 100 to buffer the starting force of the lever.

[0054] For example, in the present invention, during the disengagement process caused by the release of the steering column lever, an elastic component 300 is provided between the cam lever 201 and the cam stopper 202, through which elastic resistance is provided in the opposite direction of rotation of the lever component 100, so as to buffer the starting force of the lever while reducing the noise caused by interference between accessories.

[0055] As described above, the present invention expresses the preferred embodiments through the above description and drawings, but does not limit the terms used to describe the present invention. Without departing from the technical idea of ​​the present invention, various changes or modifications can be made to the implementation methods at the level of ordinary technicians in the technical field to which the present invention belongs, without being limited to the detailed description of the present invention and the implementation methods within the scope of protection claimed by the utility model.

Claims

1. A steering column cam mechanism, characterized in that: include: A lever component (100) rotates around a tilt bolt (12) to adjust the tilt or telescopic movement of the steering wheel; A cam lever (201) and a cam stopper (202) are coupled to the shaft of the tilting bolt (12) and are activated by the rotation of the lever member (100); and The elastic component (300) is elastically supported between the cam lever (201) and the cam stopper (202), and provides elastic resistance according to the rotation of the lever component (100).

2. The steering column cam mechanism according to claim 1, wherein: The elastic component (300) is a torsion coil spring, which includes: a first end (310) connected to the cam lever (201); and a second end (320) located at the other end of the first end (310) and connected to the cam stopper (202).

3. The steering column cam mechanism according to claim 2, wherein: A first groove portion (210) for inserting the first end portion (310) is formed in the cam lever (201), and a second groove portion (220) for inserting the second end portion (320) is formed in the cam stopper (202).

4. The steering column cam mechanism according to claim 2, wherein: In the elastic member (300), the coil portion (330) is wound around and supported on the outer periphery of the cam stopper (202).

5. The steering column cam mechanism according to claim 4, characterized in that: Regarding the coil portion (330), if the cam lever (201) and the cam stopper (202) are engaged with each other, the coil portion (330) will be wound inward to apply elastic force.

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