CN112298331A - Steering column device - Google Patents
Steering column device Download PDFInfo
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- CN112298331A CN112298331A CN202010722778.9A CN202010722778A CN112298331A CN 112298331 A CN112298331 A CN 112298331A CN 202010722778 A CN202010722778 A CN 202010722778A CN 112298331 A CN112298331 A CN 112298331A
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- cam
- bracket
- fixed
- stopper
- ridge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/184—Mechanisms for locking columns at selected positions
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering Controls (AREA)
- Clamps And Clips (AREA)
Abstract
The present invention suppresses the rotational speed of a movable cam of a lock mechanism when the lock mechanism (4) of a steering column device is released. A lock mechanism (4) of a steering column device is provided with: a movable cam (37) and a fixed cam (38) through which the lock bolt (32) passes and which are assembled so that cam ridges (43, 47) formed so as to surround the center axis of the lock bolt (32) face each other; and a cylindrical member (39) attached to the fixed cam (38). The cylindrical member (39) has a stopper (57) protruding from the outer peripheral side of the fixed cam (38) on the inclined surface of the cam (47) of the fixed cam (38). The lock mechanism (4) causes the stopper (57) to contact the cam ridge (43) of the movable cam (37) when the cam ridge (43) of the movable cam (37) falls from the cam ridge (47) of the fixed cam (38).
Description
Technical Field
The present invention relates to a steering column device.
Background
A clamp mechanism (lock mechanism) that fixes and releases a steering column to and from a bracket attached to a vehicle body has been known in the related art.
The clamping mechanism has: a clamping shaft; a fixed cam member and a movable cam member; and a lever that rotates integrally with the movable cam member. The clamp mechanism generates an axial force on the clamp shaft when a cam (cam protrusion) of the movable cam member is pressed against a cam (cam protrusion) of the fixed cam member, thereby fixing the steering column to the bracket. Further, the clamp mechanism cancels the fixation of the steering column to the bracket by eliminating the axial force generated by the clamp shaft when the cam mountain of the movable cam member falls off the cam mountain (cam protrusion) of the fixed cam member.
For example, in the clamp mechanism of patent document 1, a buffer member having elasticity is provided on an inclined surface of a cam of a movable cam member, and a metal striking noise generated when fastening of the clamp mechanism is released is reduced.
Prior art documents
Patent document
Patent document 1: japanese laid-open patent publication No. 2015-150982
Disclosure of Invention
Problems to be solved by the invention
However, in patent document 1, when the clamp mechanism is released from being fastened, the lever may be sprung up by the influence of the restoring force (elastic force) of the bracket that is subjected to the flexural deformation, or the like, and the movable cam member may be rotated violently.
Therefore, in patent document 1, when the movable cam member is rotated violently when the clamp mechanism is released from being fastened, the cam mountain of the movable cam member may collide violently with the cushioning member to generate a knocking sound.
Means for solving the problems
The steering column device of the present invention includes: a bracket mounted to the vehicle body; a column sleeve supported by the bracket; and a locking mechanism that fixes the column jacket to the bracket, the locking mechanism having: a clamp shaft penetrating the bracket; an operating rod fixed to the clamp shaft; a pair of cam members through which the clamp shaft passes and which are assembled so that cam ridges formed around the clamp shaft face each other; and a stopper protruding from an outer peripheral side of one of the pair of cam members on an inclined surface of a cam ridge of the cam member, wherein the pair of cam members includes a bracket-side cam member fixed to the bracket and a lever-side cam member fixed to the operation lever and rotating integrally with the operation lever, the lock mechanism is configured to push the cam ridge of the lever-side cam member up against the cam ridge of the bracket-side cam member to thereby cause a part of the bracket to be flexurally deformed and fix the pillar brace to the bracket when the pillar brace is fixed to the bracket, and the lock mechanism is configured to cause the stopper and the cam member of the pair of cam members, in which the stopper is not set on the inclined surface of the cam ridge, to be positioned on the inclined surface of the cam ridge when the cam ridge of the lever-side cam member is dropped from the cam ridge of the bracket-side cam member when the pillar brace is released from being fixed to the bracket Are in contact with each other.
Thus, when the column sleeve is released from being fixed to the bracket, the stopper comes into contact with (interferes with) the cam of the cam member to which the stopper is not set, and the rotation speed of the lever-side cam member is reduced and relaxed.
The lock mechanism may have a cylindrical member fixed to an outer periphery of one of the pair of cam members, and the stopper may be provided on the cylindrical member.
The lock mechanism may be configured such that, in a state where the column jacket is fixed to the bracket, the stopper is in contact with a cam mountain of a cam member of the pair of cam members, the cam mountain of which is not set on an inclined surface of the cam mountain.
The lock mechanism may be configured such that, in a state where the column jacket is released from being fixed to the bracket, the stopper does not come into contact with a cam ridge of a cam member that does not have the stopper set on an inclined surface of the cam ridge, out of the pair of cam members.
The stopper may be made of an elastic material capable of elastic deformation.
Effects of the invention
According to the present invention, when the column jacket is released from being fixed to the bracket, the cam mountain of the lever-side cam member can be prevented from violently colliding with the cam mountain of the bracket-side cam member, and the occurrence of knocking (collision noise) can be prevented.
Drawings
Fig. 1 is a side view of a steering column apparatus of the present invention.
Fig. 2 is a perspective view showing a part of the components of the steering column device of the present invention in an extracted manner.
Fig. 3 is an exploded perspective view of the locking mechanism.
Fig. 4 is a perspective view of the steering column device according to embodiment 1 in a state in which three components, namely, the movable cam, the fixed cam, and the cylindrical member, are assembled.
Fig. 5 is a perspective view of a steering column device according to embodiment 1 in a state in which a cylindrical member is assembled to a fixed cam.
Fig. 6 is a plan view of the cam portion of the fixed cam.
Fig. 7 is a plan view of the fixed cam assembled with the cylindrical member.
Fig. 8 is an explanatory view schematically showing positions of the stopper, the movable cam, and the cam mountain of the fixed cam in the unlocked state.
Fig. 9 is an explanatory view schematically showing positions of the stopper, the movable cam, and the cam mountain of the fixed cam in the locked state.
Fig. 10 is a perspective view of the steering column device according to embodiment 2 in a state in which three components, namely, the movable cam, the fixed cam, and the cylindrical member, are assembled.
Fig. 11 is a perspective view of a steering column device according to embodiment 2 in a state in which a cylindrical member is assembled to a fixed cam.
Detailed Description
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
Fig. 1 is a side view (left side view) of a steering column device 1 of the present invention. Fig. 2 is a perspective view showing a part of the components of the steering column device 1 of the present invention in an extracted state, and is a perspective view showing a state in which a lock mechanism 4 described later is incorporated in a bracket 2 described later.
In the following description, terms such as "front side", "rear side", "front end", "rear end", "front-rear direction", "vertical direction" are based only on a direction in a vehicle-mounted state of the steering column device 1, and "front side" refers to a vehicle front side, for example.
The steering column device 1 is mounted on a vehicle such as an automobile, for example, and is capable of adjusting a tilt (tilt) position, which is a position of a steering wheel (not shown) in a vehicle vertical direction, and adjusting a telescopic (telescopic) position, which is a position of the steering wheel in a vehicle longitudinal direction (in other words, an axial direction of a column jacket (column jacket)3 described later).
The steering column device 1 is substantially composed of a metal bracket 2 supported by a vehicle body, not shown, a column sleeve 3 supported by the bracket 2, and a lock mechanism 4 for fixing the column sleeve 3 to the bracket 2.
As shown in fig. 1 and 2, the carriage 2 includes: a pair of left and right side wall portions 5 facing each other in the vehicle width direction; and a pair of front and rear top wall portions 6 connecting the pair of side wall portions 5. The bracket 2 has a substantially U-shape with its bottom surface opened in a front view. The top wall portion 6 is fixed to the side wall portion 5 by welding, for example. The bracket 2 is fixed to the vehicle body in a so-called front-reverse (front down り) tilted posture by bolts inserted through mounting holes 7 formed in the respective top wall portions 6 (mounting holes of the top wall portions 6 on the vehicle rear side are not shown).
A shaft hole 9 into which the inclined hinge pin 8 can be inserted is formed at the front end of each of the side walls 5 of the bracket 2. Clamp piece portions 10 extending in the vehicle vertical direction are formed at the rear end portions of both side wall portions 5 of the bracket 2.
A long tilt hole 11 is formed as a tilt hole in each clamp piece portion 10. The tilt long hole 11 is an arc-shaped long hole having a center of curvature as a center of the shaft hole 9 which becomes a tilt rotation center at the time of the tilt position adjustment in a side view of the steering column device 1. A lock bolt 32 described later penetrates the long holes 11 for tilt.
Further, a tongue piece portion 13 surrounded by a C-shaped slit 12 is formed in one of the clamp piece portions 10. The tongue portion 13 is relatively easily deformed in the vehicle width direction (the axial direction of the lock bolt 32 described later).
As shown in fig. 1, the column sleeve 3 rotatably supports the steering shaft 20, and includes an inclined sleeve 21, a cylindrical upper sleeve 22, and a cylindrical intermediate sleeve 23.
The tilt collar 21 has a pair of left and right tilt side wall portions 24 facing each other in the vehicle width direction and a tilt lower wall portion 25 located between the tilt side wall portions, and has a substantially U-shape with an open top in a front view.
Through holes 26 into which the inclined hinge pins 8 can be inserted are formed in the pair of inclined side wall portions 24 at the end portions on the vehicle front side.
Further, the pair of inclined side wall portions 24 are formed with respective fastening piece portions 27 extending upward in the vehicle at the end portions on the vehicle rear side. The fastening piece 27 is formed with a square hole, not shown, through which a lock bolt 32, described later, passes.
The tilt collar 21 is assembled to the bracket 2 such that the through holes 26 formed in the pair of left and right tilt side wall portions 24 overlap the shaft holes 9 formed in the pair of side wall portions 5 of the bracket 2, and the pair of left and right tilt side wall portions 24 are sandwiched between the pair of side wall portions 5 of the bracket 2.
The tilt hinge pin 8 is inserted so as to penetrate through the through hole 26 formed in the tilt side wall portion 24 of the tilt bushing 21 and the shaft hole 9 of the bracket 2 after aligning the two, and connects the tilt bushing 21 and the bracket 2 to be rotatable.
The tilt sleeve 21 is supported by the bracket 2 such that the tip end portion side thereof can be swung (the tilt position can be adjusted) in the vertical direction (the direction of arrow a in fig. 1) about the tilt hinge pin 8 as a swing center (tilt axis).
The tilt collar 21 may be elastically supported by the bracket 2 by a not-shown tension coil spring type assist spring disposed outside the both tilt side wall portions 24. In this case, the tilt sleeve 21 is always biased in the counterclockwise direction in fig. 1 by the elastic force of the assist spring toward the vehicle upper side, that is, with the tilt hinge pin 8 as a fulcrum. The assist spring realizes prevention of dropping of the column jacket 3 and reduction of an operation force for adjusting the tilt position to the vehicle upper side by the elastic force when the lock mechanism 4 is unlocked.
The intermediate sleeve 23 has a pair of left and right intermediate sleeve side wall portions 28 that face each other in the vehicle width direction. An elongated hole 29 for expansion and contraction which becomes a guide when adjusting the expansion and contraction position is formed in the intermediate sleeve side wall portion 28. The long holes 29 for telescopic mechanism are long holes along the axial direction (the left-right direction in fig. 1) of the intermediate sleeve 23, and through which a lock bolt 32 described later is inserted.
The intermediate sleeve 23 is disposed slidably inside the bracket 2 and the inclined sleeve 21. The intermediate sleeve 23 is sandwiched from both sides by the clamp piece portion 10 of the bracket 2 and the clamp piece portion 27 of the tilt sleeve 21 and is fastened by the lock mechanism 4, and can be fixed to the bracket 2 and the tilt sleeve 21.
The intermediate sleeve 23 is supported by the tilt sleeve 21 so as to be movable (adjustable in telescopic position) forward and backward (in the direction of arrow b in fig. 1).
The end portion on the vehicle front side (left side in fig. 1) of the upper sleeve 22 is inserted into the end portion on the vehicle rear side (right side in fig. 1) of the intermediate sleeve 23. The upper sleeve 22 is secured to the intermediate sleeve 23 by a shear pin 30. The shear pin 30 is made of, for example, a resin material, spans both the intermediate sleeve 23 and the upper sleeve 22, and is pressed into both the intermediate sleeve 23 and the upper sleeve 22.
The extendable steering shaft 20 penetrates the upper sleeve 22 and the intermediate sleeve 23. The steering shaft 20 is rotatably supported by an upper sleeve 22 and an intermediate sleeve 23.
The lock mechanism 4 performs locking and unlocking of a swinging operation (tilt position adjustment) of the column sleeve 3 in the vehicle vertical direction and a forward and backward movement operation (telescopic position adjustment) of the intermediate sleeve 23 and the upper sleeve 22 of the tilt sleeve 21 in the vehicle longitudinal direction by bending and deforming a part of the bracket 2.
In other words, the lock mechanism 4 fixes (locks) the column jacket 3 to the bracket 2 by deforming a part (for example, the tongue piece portion 13) of the side wall portion 5 of the bracket 2. The lock mechanism 4 can release (unlock) the fixation of the column sleeve 3 to the bracket 2 by releasing the flexural deformation of a part (for example, the tongue piece portion 13) of the side wall portion 5 of the bracket 2.
Further, the lock mechanism 4 adjusts the amount of inward deflection of a portion (for example, the tongue portion 13) of the bracket 2 to adjust the amount of inward deflection of the pair of left and right inclined side wall portions 24 of the inclined sleeve 21, thereby fixing or releasing the fixing of the intermediate sleeve 23.
The tilt position adjustment and the telescopic position adjustment are performed in a state in which the functions thereof are locked when a part (for example, the tongue piece portion 13) of the side wall portion 5 of the bracket 2 is bent inward by the lock mechanism 4 and the tilt sleeve 21 and the intermediate sleeve 23 are fixed to the bracket 2.
That is, in the column device 1, when a part (for example, the tongue portion 13) of the side wall portion 5 of the bracket 2 is flexed inward by the lock mechanism 4, the tilt position adjustment and the telescopic position adjustment are locked.
As shown in fig. 3, the lock mechanism 4 includes: a metal lock bolt 32 as a clamp shaft; a metal bearing 33; a metal nut 34; a metallic stroke guide 35; a resin-made operating lever 36; a movable cam 37 as a lever-side cam member; a fixed cam 38 as a bracket-side cam member; and a cylindrical member 39 having a stopper 57 and attached to the fixed cam 38.
The lock mechanism 4 will be described in detail below with reference to fig. 3 to 7. Fig. 3 is an exploded perspective view of the lock mechanism 4. Fig. 4 is a perspective view of a state in which three of the movable cam 37, the fixed cam 38, and the cylindrical member 39 are assembled. Fig. 5 is a perspective view of the fixed cam 38 with the cylindrical member 39 assembled. Fig. 6 is a plan view of the cam portion 45 of the fixed cam 38. Fig. 7 is a plan view of the fixed cam 38 to which the cylindrical member 39 is assembled. Fig. 8 is an explanatory diagram schematically showing the positions of the stopper 57, the cam ridge 43 of the movable cam 37, and the cam ridge 47 of the fixed cam 38 in the unlocked state. Fig. 9 is an explanatory diagram schematically showing the positions of the stopper 57, the cam ridge 43 of the movable cam 37, and the cam ridge 47 of the fixed cam 38 in the locked state. In fig. 8 and 9, hatched portions indicate cam ridges 43 of the movable cam 37.
As shown in fig. 3, the lock bolt 32 penetrates through the stroke guide 35, and also penetrates through the long hole 29 for expansion and contraction, the fixed cam 38, and the movable cam 37 formed in the intermediate sleeve 23. The lock bolt 32 fastens the nut 34 from the operating lever 36 side via the bearing 33, thereby preventing the disengagement thereof. The bearing 33 is, for example, a thrust needle bearing.
As shown in fig. 2 and 3, the stroke guide 35 penetrates through the long hole 11 for tilt of the clamp piece portion 10 on the side where the operation lever 36 is not disposed and a square hole, not shown, formed in the fastening piece portion 27 on the side where the operation lever 36 is not disposed of the tilt sleeve 21, is fitted into the long hole 29 for telescopic motion on the side where the operation lever 36 is not disposed of the intermediate sleeve 23 in a state where rotation is restricted, and is held slidably in the front-rear direction.
As shown in fig. 1 to 3, the operating lever 36 has a grip portion 36a formed to extend toward the vehicle rear side. The handle portion 36a is operated by the driver. Further, the operating lever 36 is formed with a lever square hole 36b to which the movable cam 37 is attached.
The movable cam 37 and the fixed cam 38 are members made of a metal material, and correspond to a pair of cam members assembled so that cam ridges formed around the clamping shaft face each other.
In other words, the movable cam 37 and the fixed cam 38 are a pair of cam members assembled so that cam ridges formed so as to surround the center axis of the lock bolt 32 face each other.
As shown in fig. 3 and 4, the metal movable cam 37 has a prism portion 41 on one end side inserted into the rod-square hole 36b and a cam portion 42 assembled to the other end side of the fixed cam 38. The prism portion 41 of the movable cam 37 is formed in a polygonal cross section (for example, a cross section of 8-sided polygon).
The cam portion 42 of the movable cam 37 has a cylindrical shape, and a plurality of (for example, 3) cam ridges 43 are formed on an end surface thereof. The cam portion 42 of the movable cam 37 is formed with the same number of cam ridges 43 as the fixed cam 38. The cam mountain 43 of the movable cam 37 is formed along the circumferential direction of the cam portion 42 of the movable cam 37. That is, the cam mountain 43 of the movable cam 37 is formed to surround the center axis of the lock bolt 32 penetrating the movable cam 37.
In other words, the cam mountain 43 of the movable cam 37 is formed around the center axis of the lock bolt 32 penetrating the movable cam 37.
The movable cam 37 is assembled to the fixed cam 38 such that a cam ridge 43 formed on an end surface of the cam portion 42 engages with a cam ridge 47 formed on an end surface of the cam portion 45 of the fixed cam 38.
Further, the end surface of the cam portion 42 of the movable cam 37 is formed in a shape similar to the end surface of the cam portion 45 of the fixed cam 38.
As shown in fig. 3 to 5, the metal fixed cam 38 includes a cam portion 45 assembled to one end side of the movable cam 37 and a prism portion 46 at the other end side.
As shown in fig. 5 to 7, the cam portion 45 of the fixed cam 38 has a cylindrical shape, and a plurality of (e.g., 3) cam ridges 47 are formed on an end surface thereof. The cam portion 45 of the fixed cam 38 is formed with the same number of cam ridges 47 as the movable cam 37. The cam mountain 47 of the fixed cam 38 is formed along the circumferential direction of the cam portion 45 of the fixed cam 38. That is, the cam mountain 47 of the fixed cam 38 is formed to surround the center axis of the lock bolt 32 penetrating the fixed cam 38.
In other words, the cam mountain 47 of the fixed cam 38 is formed around the center axis of the lock bolt 32 penetrating the fixed cam 38.
The fixed cam 38 is assembled to the movable cam 37 such that a cam ridge 47 formed on an end surface of the cam portion 45 engages with a cam ridge 43 formed on an end surface of the cam portion 42 of the movable cam 37.
As shown in fig. 5 to 7, a cam crest flat surface 51, a cam valley flat surface 52, and an inclined surface 53 are formed by the cam ridge 43 on the end surface of the cam portion 45 of the fixed cam 38.
The cam top flat surface 51 of the fixed cam 38 is a flat surface on which the cam 43 of the movable cam 37 can be pushed, and is formed at the top (near the apex) of the cam 47 of the fixed cam 38. The cam crest flat surface 51 of the fixed cam 38 is formed orthogonal to, for example, the center axis of the cam portion 45 of the fixed cam 38.
The cam valley portion flat surfaces 52 of the fixed cam 38 are formed between the cam hills 47 of the cam portion 45 of the fixed cam 38. The cam valley portion plane 52 of the fixed cam 38 is formed orthogonal to, for example, the center axis of the cam portion 45 of the fixed cam 38.
The inclined surface 53 of the fixed cam 38 is formed between the cam crest flat surface 51 and the cam valley flat surface 52. The inclined surface 53 of the fixed cam 38 is formed to be inclined with respect to a plane orthogonal to the center axis of the cam portion 45 of the fixed cam 38, for example.
The prism portion 46 of the fixed cam 38 is formed in a rectangular cross section. The prism portion 46 of the fixed cam 38 penetrates through the long hole 11 for tilt of the clamp piece portion 10 on the side where the operation lever 36 is disposed and a square hole, not shown, of the fastening piece portion 27 formed on the side where the operation lever 36 is disposed of the tilt sleeve 21, is fitted into the long hole 29 for telescopic movement formed on the side where the operation lever 36 is disposed of the intermediate sleeve 23 in a state where rotation is restricted, and is held slidably in the front-rear direction.
The cylindrical member 39 is made of an elastically deformable elastic material such as rubber, and as shown in fig. 3 to 5 and 7, includes a cylindrical main body portion 56 into which the cam portion 45 of the fixed cam 38 is inserted, and a plurality of stoppers 57 formed at one end of the main body portion 56. The cylindrical member 39 fixes the body portion 56 to the outer peripheral surface of the cam portion 45 of the fixed cam 38 by vulcanization adhesion, for example.
The stopper 57 is formed at one end surface of the body portion 56 of the tubular member 39 by a predetermined length along the circumferential direction of the body portion 56. The length of the stopper 57 in the circumferential direction of the body portion 56 is set to, for example, a length along the circumferential direction of the inclined surface 53 of the cam 47 of the fixed cam 38 or less.
The stopper 57 is disposed at the position of the inclined surface 53 of the cam portion 45 of the fixed cam 38 in the circumferential direction of the cam portion 45 of the fixed cam 38 when the cylindrical member 39 is attached to the fixed cam 38.
That is, the stopper 57 is attached to the fixed cam 38 so as to overlap the inclined surface 53 of the cam portion 45 of the fixed cam 38 over the entire length in the circumferential direction of the body portion 56.
In other words, the stopper 57 is set on the inclined surface 53 of the cam 47 of the fixed cam 38 to which the cylindrical member 39 is attached. Further, the stopper 57 is set to the cam member to which the cylindrical member 39 is attached, out of the pair of cam members.
As shown in fig. 5 and 7, the stopper 57 is formed to protrude from the outer peripheral side of the fixed cam 38 on the inclined surface 53 of the cam portion 45 of the fixed cam 38.
In other words, the stopper 57 is formed on the inclined surface 53 of the cam portion 45 of the fixed cam 38 so as to protrude from the outer side of the fixed cam 38 toward the inner side of the fixed cam 38 in the radial direction of the fixed cam 38. Further, the stopper 57 is formed to protrude into a passage area on the inclined surface 53 of the fixed cam 38 through which the cam ridge 43 of the movable cam 37 passes.
The stopper 57 has: a radial protrusion 58 having a rectangular cross section and protruding toward the inner peripheral side of one end of the body 56; and an axial protrusion 59 having a rectangular cross section and protruding only in the axial direction from one end surface of the body 56. The stoppers 57 are formed in the same number as the cam ridges 47 of the cam portion 45 of the fixed cam 38. In fig. 4, 5, and 7 to 9, for convenience of explanation, the stopper 57 is indicated by an auxiliary line formed by a broken line to indicate the radial projecting portion 58 and the axial projecting portion 59.
The radial projecting portion 58 is formed so as to overlap the inclined surface 53 of the cam portion 45 of the fixed cam 38 over the entire length in the circumferential direction of the body portion 56. The radial projecting portion 58 is formed to project into a passage area on the inclined surface 53 of the fixed cam 38 through which the cam ridge 43 of the movable cam 37 passes.
As shown in fig. 5, the radial protrusion 58 is formed to have a predetermined length along the axial direction of the body portion 56.
The lock mechanism 4 sets both the tilt position adjusting function and the telescopic position adjusting function of the column device 1 to the locked state in a state where the cam ridge 43 of the movable cam 37 is pressed against the cam ridge top flat surface 51 of the cam ridge 47 of the fixed cam 38.
In the lock mechanism 4, when the cam ridges of the movable cam 37 and the fixed cam 38 are brought up to each other, the lock bolt 32 is pulled to the operating lever 36 side in the axial direction thereof to narrow the interval between the stroke guide 35 and the fixed cam 38.
When the distance between the stroke guide 35 and the fixed cam 38 is narrowed to narrow the distance between the pair of side wall portions 5 of the bracket 2, the column jacket 3 is fixed to the bracket 2.
That is, in the lock mechanism 4, when the column jacket 3 is fixed to the bracket 2, the operation lever 36 is rotated to push the cam ridge 43 of the movable cam 37 against the cam ridge top surface 51 of the cam ridge 47 of the fixed cam 38, so that the fixed cam 38 is displaced in the axial direction of the lock bolt 32 (clamp shaft) with respect to the movable cam 37, and a part of the bracket 2 is deformed to fix the column jacket 3 to the bracket 2.
In such a locked state, the tilt position adjustment (position adjustment in the vehicle vertical direction) and the telescopic position adjustment (position adjustment in the vehicle longitudinal direction) cannot be performed.
As shown in fig. 8, in the lock state in which the cam ridge 43 of the movable cam 37 is pressed against the cam ridge top surface 51 of the cam ridge 47 of the fixed cam 38, the lock mechanism 4 is pressed against the cam ridge 43 of the movable cam 37 while the stopper 57 is in contact with the cam ridge 43 of the movable cam 37. That is, when the lock mechanism 4 is in the locked state, the stopper 57 contacts the cam ridge 43 of the movable cam 37 and presses the cam ridge 43 of the movable cam 37.
In addition, when the cam ridge 43 of the movable cam 37 falls on the cam ridge valley plane 52 which is the valley between the cam ridges 47 of the engaging fixed cam 38, the lock mechanism 4 is in a state in which both the tilt position adjusting function and the telescopic position adjusting function of the steering column device 1 are unlocked (unlocked state).
When the cam mountain of the movable cam 37 falls on the cam mountain valley plane 52 which is a valley between the cam mountains 47 of the fixed cam 38 on the mating side, the lock mechanism 4 releases the tensile axial force of the lock bolt 32. The lock mechanism 4 sets both the tilt position adjusting function and the telescopic position adjusting function of the steering column device 1 in the lock release state when the tightening force applied to the pair of side wall portions 5 and the like of the bracket 2 is released by loosening the tensile axial force of the lock bolt 32.
In such an unlocked state, the tilt position adjustment (the position adjustment in the vehicle vertical direction) can be performed within the range in which the long tilt hole 11 is formed. In such an unlocked state, the telescopic position can be adjusted (the position in the vehicle longitudinal direction) within the range in which the telescopic long hole 29 is formed.
As shown in fig. 9, in the lock mechanism 4, when the movable cam 37 falls into the unlocked state of the cam valley plane 52, which is the valley between the cam ridges 47 of the fixed cam 38, the stopper 57 does not contact the cam ridge 43 of the movable cam 37 and does not press against the cam ridge 43 of the movable cam 37. That is, when the lock mechanism 4 is in the unlocked state, the stopper 57 does not contact the cam ridge 43 of the movable cam 37 and does not press against the cam ridge 43 of the movable cam 37.
When the fixation of the column jacket 3 with respect to the bracket 2 is released, the tensile axial force of the clamping shaft is released. Therefore, the operating lever may be sprung up by the influence of the restoring force (elastic force) of the bracket 2 that is subjected to flexural deformation, or the like, and the movable cam 37 may be rotated violently when the fixation of the column sleeve 3 to the bracket 2 is released.
When the movable cam 37 is rotated vigorously when the column jacket 3 is released from being fixed to the bracket 2, the cam ridge 43 of the movable cam 37 may collide violently with the cam ridge 47 of the fixed cam 38, thereby generating a knocking sound. In particular, when the amount of lift generated by the cam ridges 43 and 47 when the cam ridge 43 of the movable cam 37 strikes the cam ridge 47 of the fixed cam 38 increases, the movable cam 37 rotates violently when the fixation of the column sleeve 3 to the bracket 2 is released.
In the lock mechanism 4 according to embodiment 1 described above, when the lever 36 is rotated to drop the cam ridge 43 of the movable cam 37 from the cam ridge 47 of the fixed cam 38 when the column jacket 3 is released from being fixed to the bracket 2, the stopper 57 is brought into contact with the cam ridge 43 of the movable cam 37.
In other words, when the column sleeve 3 is released from being fixed to the bracket 2, the lock mechanism 4 rotates the operating lever 36 and drops the cam ridge 43 of the movable cam 37 from the cam ridge 47 of the fixed cam 38, and brings the stopper 57 into contact with the cam ridge of the cam member (the cam member to which the cylindrical member 39 is not attached) to which the stopper 57 is not set, out of the pair of cam members.
Therefore, in the steering column device 1 according to embodiment 1 described above, when the column jacket 3 is released from being fixed to the bracket 2, the stopper 57 set (attached) to the fixed cam 38 comes into contact with (interferes with) the cam ridge 43 of the movable cam 37, and the rotational speed of the movable cam 37 is reduced and relaxed.
Therefore, in the steering column device 1, when the fixation of the column jacket 3 to the bracket 2 is released, the cam ridge 43 of the movable cam 37 and the cam ridge 47 of the fixed cam 38 can be suppressed from violently colliding with each other, and the occurrence of knocking (collision noise) can be suppressed.
The lock mechanism 4 has a cylindrical tubular member 39 fixed to the outer periphery of the fixed cam 38, and a stopper 57 is provided on the tubular member 39. That is, the lock mechanism 4 has a cylindrical tubular member 39 fixed to the outer periphery of one of the pair of cam members, and a stopper 57 is provided on the tubular member 39.
Therefore, the cylindrical member 39 having the stopper 57 is attached to the fixed cam 38 over the entire circumference of the cam portion 45 of the fixed cam 38, and can be firmly attached to the fixed cam 38. Therefore, the steering column device 1 can project the stopper 57 to a desired position, that is, to the inclined surface of the cam mountain of the cam member with high accuracy.
In the lock mechanism 4, when the column jacket 3 is fixed to the bracket 2 (the lock mechanism 4 is in the locked state), the cam ridge 43 of the movable cam 37 contacts the stopper 57.
In other words, in the lock mechanism 4, when the column jacket 3 is fixed to the bracket 2 (the lock mechanism 4 is in the locked state), the cam mountain of the cam member (the cam member to which the cylindrical member 39 is not attached) of the pair of cam members in which the stopper 57 is not set comes into contact with the stopper.
Thus, when the column jacket 3 is released from being fixed to the bracket 2, the stopper 57 comes into contact with the cam ridge 43 of the movable cam 37 from the start of the movement of the movable cam 37. That is, the lock mechanism 4 can more effectively suppress the violent rotation of the movable cam 37 when releasing the fixation of the column sleeve 3 to the bracket 2.
Therefore, when the column sleeve 3 is released from being fixed to the bracket 2, the lock mechanism 4 can further suppress the cam ridge 43 of the movable cam 37 from strongly colliding with the cam ridge 47 of the fixed cam 38, and can further suppress the knocking sound (collision sound).
In the lock mechanism 4, when the column jacket 3 is released from being fixed to the bracket 2 (the lock mechanism 4 is in the unlocked state), the stopper 57 does not contact the cam ridge 43 of the movable cam 37.
In other words, in the lock mechanism 4, when the column jacket 3 is in the unlocked state (the lock mechanism 4 is in the unlocked state) with respect to the bracket 2, the cam mountain of the cam member (the cam member to which the cylindrical member 39 is not attached) of the pair of cam members in which the stopper 57 is not provided does not contact the stopper.
Thus, when the column jacket 3 is fixed to the bracket 2, the movable cam 37 is not restrained from moving at a speed that is suppressed by the stopper 57. That is, when the driver operates the lock mechanism 4 to fix the column sleeve 3 to the bracket 2, the driver can smoothly operate the operation lever 36 without giving a sense of incongruity.
Other embodiments of the present invention will be described below. Note that the same components as those in embodiment 1 are denoted by the same reference numerals, and redundant description thereof is omitted.
The steering column device according to embodiment 2 has substantially the same configuration as the steering column device 1 according to embodiment 1 described above, but the cylindrical member 39 is fixed to the movable cam 37 instead of the fixed cam 38. The cylindrical member 39 in embodiment 2 fixes the body portion 56 to the outer peripheral surface of the cam portion 42 of the movable cam 37 by, for example, vulcanization bonding.
In embodiment 2, the stopper 57 of the cylindrical member 39 is disposed at the position of the inclined surface 65 of the cam portion 42 of the movable cam 37 in the circumferential direction of the cam portion 42 of the movable cam 37 when the cylindrical member 39 is attached to the movable cam 37.
That is, in embodiment 2, the stopper 57 is attached to the movable cam 37 so as to overlap the inclined surface 65 of the cam portion 42 of the movable cam 37 over the entire length in the circumferential direction of the body portion 56.
In other words, the stopper 57 is set on the inclined surface 65 of the cam 43 of the movable cam 37 to which the cylindrical member 39 is attached. Further, the stopper 57 is set to the cam member to which the cylindrical member 39 is attached, out of the pair of cam members.
In the steering column device according to embodiment 2, when the lock mechanism 4 is in the locked state, the stopper 57 is in contact with and pressed against the cam ridge 47 of the fixed cam 38 that pushes up the cam ridge 43 of the movable cam 37. That is, when the lock mechanism 4 is in the locked state, the stopper 57 is in contact with the cam ridge 47 of the fixed cam 38 and is pressed against the cam ridge 47 of the fixed cam 38.
In the steering column device according to embodiment 2, when the lock mechanism 4 is in the unlocked state, the stopper 57 is not pressed against the cam ridge 47 of the fixed cam 38, but is not pressed against the cam ridge 47 of the fixed cam 38.
In other words, in the lock mechanism 4 according to embodiment 2, in a state where the fixation to the column jacket 3 of the bracket 2 is released (the lock mechanism 4 is in a lock release state), the stopper 57 does not come into contact with the cam mountain of the cam member (the cam member to which the cylindrical portion ネ is not attached) of the pair of cam members in which the stopper 57 is not set, and is not pressed against the cam mountain. That is, when the lock mechanism 4 is in the unlocked state, the stopper 57 does not contact the cam ridge 43 of the movable cam 37 and does not press against the cam ridge 43 of the movable cam 37.
In the steering column device according to embodiment 2, when the fixation of the column jacket 3 to the bracket 2 is released, the stopper 57 set (attached) to the movable cam 37 comes into contact with (interferes with) the cam ridge 47 of the fixed cam 38, and the rotational speed of the movable cam 37 is reduced and relaxed.
In the lock mechanism 4 according to embodiment 2, when the lever 36 is rotated to drop the cam ridge 43 of the movable cam 37 from the cam ridge 47 of the fixed cam 38 when the column jacket 3 is released from being fixed to the bracket 2, the stopper 57 comes into contact with the cam ridge 47 of the fixed cam 38.
In other words, in the lock mechanism 4 according to embodiment 2, when the operation lever 36 is rotated to drop the cam ridge 43 of the movable cam 37 from the cam ridge 47 of the fixed cam 38 when the column jacket 3 is released from being fixed to the bracket 2, the stopper 57 is brought into contact with the cam ridge of the cam member (the cam member to which the cylindrical member 39 is not attached) in which the stopper 57 is not set, out of the pair of cam members.
The steering column device according to embodiment 2 can also exhibit substantially the same operational advantages as those of embodiment 1 described above.
While specific embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and scope of the invention.
For example, the number of stoppers 57 provided on the cylindrical member 39 is the same as the number of cam ridges of the cam member to which the cylindrical member 39 is attached in the above-described embodiment, but may be smaller than the number of cam ridges of the cam member to which the cylindrical member 39 is attached. That is, the cam surface of the cam member to which the cylindrical member 39 is attached may have a cam surface on which the stopper 57 is not provided.
In the lock mechanism 4, a buffer member made of an elastic material such as rubber may be disposed between the cam ridge 43 of the movable cam 37 and the cam ridge 47 of the fixed cam 38 in the circumferential direction of the lock bolt 32. Thus, when the lock mechanism 4 is unlocked, not only the knocking sound can be suppressed by suppressing the rotational speed of the movable cam 37, but also the metal knocking sound generated by the direct collision of the cam ridge 43 of the movable cam 37 with the cam ridge 47 of the fixed cam 38 can be suppressed, and the generation of the knocking sound can be further suppressed. The cushioning member may be formed integrally with the cylindrical member 39, for example.
Description of the reference numerals
1 … steering column device
2 … bracket
3 … column sleeve
4 … locking mechanism
32 … locking bolt
33 … bearing
34 … nut
35 … travel guide
36 … operating rod
37 … Movable cam (Lever side cam component)
38 … fixed cam (bracket side cam component)
39 … tubular member
43 … cam mountain
47 … cam mountain
53 … inclined plane
57 … stop member.
Claims (9)
1. A steering column device characterized by comprising:
a bracket mounted to a vehicle body;
a column jacket supported by the bracket; and
a locking mechanism that fixes the column jacket to the bracket,
the lock mechanism has: a clamp shaft penetrating the bracket; an operating lever fixed to the clamp shaft; a pair of cam members through which the clamp shaft passes and which are assembled so that cam ridges formed around the clamp shaft face each other; and a stopper that protrudes from an outer peripheral side of the pair of cam members on an inclined surface of a cam ridge of one of the pair of cam members,
the pair of cam members are composed of a bracket-side cam member fixed to the bracket and a lever-side cam member fixed to the operating lever and rotating integrally with the operating lever,
the lock mechanism fixes the column jacket tube to the bracket by causing a cam ridge of the lever-side cam member to strike a cam ridge of the bracket-side cam member to cause a part of the bracket to be bent and deformed when fixing the column jacket tube to the bracket,
the lock mechanism causes the stopper to contact a cam mountain of a cam member, which is not provided with the stopper on an inclined surface of the cam mountain, of the pair of cam members when the cam mountain of the lever-side cam member falls from the cam mountain of the bracket-side cam member when the column sleeve is released from being fixed to the bracket.
2. The steering column device according to claim 1,
the lock mechanism has a cylindrical member fixed to an outer periphery of one of the pair of cam members, and the stopper is provided on the cylindrical member.
3. The steering column device according to claim 1 or 2,
in the lock mechanism, when the column jacket is fixed to the bracket, the stopper is in contact with a cam mountain of a cam member of the pair of cam members, the cam mountain of which is not set on the inclined surface of the cam mountain.
4. The steering column device according to claim 1 or 2,
in the lock mechanism, when the column jacket is released from being fixed to the bracket, the stopper does not come into contact with the cam ridge of the cam member that does not set the stopper on the inclined surface of the cam ridge, out of the pair of cam members.
5. The steering column device according to claim 3,
in the lock mechanism, when the column jacket is released from being fixed to the bracket, the stopper does not come into contact with the cam ridge of the cam member that does not set the stopper on the inclined surface of the cam ridge, out of the pair of cam members.
6. The steering column device according to claim 1 or 2,
the stopper is composed of an elastic material capable of elastic deformation.
7. The steering column device according to claim 3,
the stopper is composed of an elastic material capable of elastic deformation.
8. The steering column device according to claim 4,
the stopper is composed of an elastic material capable of elastic deformation.
9. The steering column device according to claim 5,
the stopper is composed of an elastic material capable of elastic deformation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-137419 | 2019-07-26 | ||
| JP2019137419A JP7227102B2 (en) | 2019-07-26 | 2019-07-26 | steering column device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112298331A true CN112298331A (en) | 2021-02-02 |
| CN112298331B CN112298331B (en) | 2023-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010722778.9A Active CN112298331B (en) | 2019-07-26 | 2020-07-24 | Steering column device |
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| Country | Link |
|---|---|
| JP (1) | JP7227102B2 (en) |
| CN (1) | CN112298331B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220234646A1 (en) * | 2021-01-27 | 2022-07-28 | Yamada Manufacturing Co., Ltd. | Steering device |
| US20220234647A1 (en) * | 2021-01-27 | 2022-07-28 | Yamada Manufacturing Co., Ltd. | Steering device |
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| JP6451368B2 (en) * | 2015-02-09 | 2019-01-16 | 日本精工株式会社 | Cam device with speed reduction mechanism and steering wheel position adjusting device |
| JP6455200B2 (en) * | 2015-02-09 | 2019-01-23 | 日本精工株式会社 | Cam device with speed reduction mechanism and steering wheel position adjusting device |
| KR101624833B1 (en) * | 2015-02-13 | 2016-05-26 | 주식회사 만도 | Steering column for vehicle |
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| JP2006051876A (en) * | 2004-08-11 | 2006-02-23 | Nissan Motor Co Ltd | Steering device |
| CN105980235A (en) * | 2014-02-12 | 2016-09-28 | 日本精工株式会社 | Steering device |
| EP3061669A1 (en) * | 2015-02-27 | 2016-08-31 | Fuji Autotech France SAS | Locking device for an adjustable steering column of an automobile vehicle |
| CN206485388U (en) * | 2017-02-28 | 2017-09-12 | 长城汽车股份有限公司 | Steering column locking device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20220234646A1 (en) * | 2021-01-27 | 2022-07-28 | Yamada Manufacturing Co., Ltd. | Steering device |
| US20220234647A1 (en) * | 2021-01-27 | 2022-07-28 | Yamada Manufacturing Co., Ltd. | Steering device |
| US11498606B2 (en) * | 2021-01-27 | 2022-11-15 | Yamada Manufacturing Co., Ltd. | Steering device |
| US11597426B2 (en) * | 2021-01-27 | 2023-03-07 | Yamada Manufacturing Co., Ltd. | Steering device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7227102B2 (en) | 2023-02-21 |
| JP2021020526A (en) | 2021-02-18 |
| CN112298331B (en) | 2023-01-20 |
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Address after: Shizuoka Patentee after: JETTEGTT STEERING COLUMN SYSTEM Address before: Shizuoka Patentee before: FUJI KIKO Co.,Ltd. |