CN114954625A - Cam assembly and steering column - Google Patents
Cam assembly and steering column Download PDFInfo
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- CN114954625A CN114954625A CN202110194052.7A CN202110194052A CN114954625A CN 114954625 A CN114954625 A CN 114954625A CN 202110194052 A CN202110194052 A CN 202110194052A CN 114954625 A CN114954625 A CN 114954625A
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- cam
- elastic piece
- bottom plate
- tow hook
- handle
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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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a cam assembly and a steering column, comprising a first cam and a second cam; an elastic piece which can help the first cam and the second cam to be locked is arranged on the second cam; the first cam is provided with a towing hook capable of driving the elastic piece to move and reset. According to the cam assembly and the steering column disclosed by the invention, the elastic piece is arranged on the second cam, the towing hook is arranged on the first cam, when the operating handle is locked, the elastic piece is triggered by the towing hook, and can provide acting force for the first cam to help the first cam to rotate towards the locking direction, so that the acting force on the handle is reduced, the releasing force of the handle can be increased under the action of the elastic piece, and the first cam is not easy to release when the handle is locked. When the operating handle is loosened, the loosening force of the handle cannot be instantaneously reduced, and the abrupt feeling during operation cannot occur.
Description
Technical Field
The invention relates to the technical field of automobile steering systems, in particular to a cam assembly and a steering column.
Background
The manual adjusting handle device of the automobile steering column is arranged on the steering column and used for locking and loosening adjustment during manual two-way adjustment or manual four-way adjustment of a steering wheel. The common structure is that a metal cam is arranged on an adjusting handle, another metal cam is assembled on a U-shaped support of the steering column, the principle of the common structure is that rotary displacement is converted into axial displacement of the cam by upwards rotating the handle, the U-shaped support of the column is tightly held, so that the effect of fixing the corresponding adjusting position of the steering column is achieved, and meanwhile, the self-locking function of a cam mechanism enables the adjusting handle to be fixed at a locking position.
At present, due to the inherent structural form of the cams, the handle locking force can be very large in the locking process due to the relative jacking motion between the two cams, and the handle loosening force can be very small due to the fact that the two cams are separated instantly in the loosening process. In order to improve the portability of handle adjustment and reduce customer complaints, the locking force of the handle is generally reduced, but at the same time, the releasing force of the handle is reduced, and abnormal unlocking of the handle occurs.
Disclosure of Invention
The invention aims to provide a cam assembly and a steering column, which can effectively balance loosening force and locking force when a handle is adjusted.
The technical scheme of the invention provides a cam assembly, which comprises a first cam with a first convex part and a first accommodating groove and a second cam with a second convex part and a second accommodating groove;
the second boss is clearance-fitted in the first receiving groove, and the first boss is clearance-fitted in the second receiving groove;
the groove bottom plate of the second accommodating groove comprises a first bottom plate and a second bottom plate which are connected in a step shape, and the second bottom plate is higher than the first bottom plate;
when the first convex part is in contact with the first bottom plate, the first cam and the second cam are in a release state; when the first convex part is contacted with the second bottom plate, the first cam and the second cam are in a locking state;
the second cam is provided with an elastic piece which can help the first cam and the second cam to be locked, the elastic piece has an initial position on the second cam, and when the elastic piece is at the initial position, the elastic piece is separated from the first cam;
the first cam is provided with a towing hook capable of driving the elastic piece to move and reset;
when the first cam is driven to rotate towards the locking direction, the tow hook triggers the elastic piece to leave the initial position, and the elastic piece acts on the tow hook and/or one first convex part and helps to drive the first cam to rotate towards the locking direction;
when the first cam is driven to rotate towards the loosening direction, the towing hook can drive the elastic piece to return to the initial position, and before the elastic piece reaches the initial position, the elastic piece can damp the first cam to rotate towards the loosening direction.
Through dispose the elastic component on the second cam, dispose the tow hook on first cam, when first cam rotated towards locking direction, the elastic component was triggered by the tow hook, can help for first cam provides the effort and rotate towards locking direction to reduce the effort on the handle, the effect of elastic component can increase the loosening force of handle, is difficult to the pine when handle locking state takes off. When the first cam rotates towards the loosening direction, the first cam is damped to rotate towards the loosening direction under the action of the elastic piece, so that the loosening force of the handle is not instantaneously reduced, and the abrupt feeling during operation is avoided.
In one optional technical solution, the first bottom plate and the second bottom plate are connected with a slope surface;
when the first cam is driven to rotate towards the locking direction, the towing hook triggers the elastic piece to leave the initial position when the first convex part climbs up the slope and contacts with the second bottom plate;
when the first cam is driven to rotate towards the loosening direction, the towing hook drives the elastic piece to return to the initial position when the first convex part slides down through the slope surface and is in contact with the first bottom plate.
The first convex part is convenient to switch positions between the first bottom plate and the second bottom plate by arranging the slope surface.
In an alternative technical scheme, the towing hook is arranged on the inner side of the first convex part, and the matching of the first convex part and the second accommodating groove is not influenced.
In one optional technical scheme, the elastic piece is provided with an triggering end and a fixed end;
the top surface of one of the second protrusions is provided with a top groove;
the fixed end is fixed on one of the second protrusions, and the trigger end is positioned in the top groove and can be moved out of the top groove by the towing hook.
The elastic piece is pre-tightened between the two second convex parts, the fixed end of the elastic piece is fixed on one of the second convex parts, and the trigger end of the elastic piece is positioned in the top groove of the other second convex part, so that the elastic piece is conveniently moved and ejected by the towing hook, and therefore acting force is generated on the first cam and the elastic piece is also conveniently driven to reset by the towing hook.
In one optional technical scheme, one side of the second convex part for mounting the fixed end, which faces to the adjacent first bottom plate, is provided with a side groove;
the stiff end is installed in the lateral part recess, make things convenient for the fixed mounting of stiff end.
In one optional technical scheme, the elastic part is a torsion spring, so that the structure is simple and the assembly is convenient.
In an optional technical scheme, the towing hook comprises a towing hook base and a towing hook extension, the towing hook base is connected with the first cam, and the towing hook extension is connected with the towing hook base to form an L shape;
said trigger end being between said tow hook extension and said first cam in an axial direction along said first cam;
when said first cam is driven in rotation in a locking direction, said tow hook extension is in contact with said triggering end and is able to push said triggering end out of said top groove when said first protrusion is in contact with said second base plate, said triggering end moving out of said top groove acting on said tow hook base and/or one of said first protrusions;
when the first cam is driven to rotate towards the loosening direction, the towing hook base is contacted with the trigger end to drive the trigger end to reset.
When the first convex part is in contact with the second bottom plate during locking, the first cam moves outwards axially to drive the towing hook to move outwards axially, so that the towing hook extension part ejects the trigger end from the top groove, and the trigger end after moving out can act on the towing hook base part and/or one first convex part, so that the first cam is helped to rotate towards the locking direction, and the acting force on the handle is helped to be reduced. When loosening, the tow hook basal portion withstands trigger end and moves towards top recess side, and when first convex part and first bottom plate contact, thereby first cam axial moves inwards drives the tow hook axial and moves inwards for the tow hook extension leaves the trigger end, and when the trigger end reachd the notch department of top recess, can fall into the top recess automatically and accomplish and reset.
In one optional technical solution, the base boss for contacting with the trigger end is arranged on the tow hook base, so that the moving distance of the trigger end when contacting with the tow hook base can be reduced, and the trigger end can keep a larger force acting on the tow hook base.
The technical scheme of the invention also provides a steering column which comprises a guide sleeve, a column support, a handle with a bolt and the cam assembly in any one of the technical schemes;
the pipe column support comprises a first side plate and a second side plate which are arranged at intervals, and the guide sleeve is positioned between the first side plate and the second side plate;
the first cam is fixedly arranged on the handle, and the second cam is fixedly arranged on the first side plate;
the bolt penetrates through the first cam, the second cam, the first side plate and the second side plate, and the bolt is locked through a nut;
the bolt supports the guide sleeve.
Through dispose the elastic component on the second cam, dispose the tow hook on first cam, when operating handle locks, first cam rotates towards locking direction, and the elastic component is triggered by the tow hook, can help towards locking direction rotation for first cam provides the effort to reduce the effort on the handle, the effect of elastic component can increase the loosening force of handle, is difficult to the pine when handle locking state takes off. When the operating handle is loosened, the first cam rotates towards the loosening direction, and the first cam is damped to rotate towards the loosening direction under the action of the elastic piece, so that the loosening force of the handle cannot be instantly reduced, and the abrupt feeling during operation cannot occur.
In an optional technical solution, a U-shaped frame with an upward opening is configured between the first side plate and the second side plate, and the bolt passes through the U-shaped frame; the guide sleeve is at least partially positioned in the U-shaped frame to provide a limit for the guide sleeve.
By adopting the technical scheme, the method has the following beneficial effects:
according to the cam assembly and the steering column provided by the invention, the elastic piece is arranged on the second cam, the towing hook is arranged on the first cam, when the operating handle is locked, the first cam rotates towards the locking direction, the elastic piece is triggered by the towing hook, and the elastic piece can provide acting force for the first cam to help the first cam to rotate towards the locking direction, so that the acting force on the handle is reduced, the loosening force of the handle can be increased under the action of the elastic piece, and the first cam is not easy to loosen in the handle locking state. When the operating handle is loosened, the first cam rotates towards the loosening direction, and the first cam is damped to rotate towards the loosening direction under the action of the elastic piece, so that the loosening force of the handle cannot be instantly reduced, and the abrupt feeling during operation cannot occur.
Drawings
FIG. 1 is a perspective view of a cam assembly provided in accordance with an embodiment of the present invention;
FIG. 2 is an exploded view of the cam assembly;
FIG. 3 is a perspective view of a first cam configured with a tow hook;
FIG. 4 is a perspective view of a second cam configured with a resilient member;
FIG. 5 is a schematic view of one of the first projections having a top groove thereon and the other first projection having a side groove thereon;
FIG. 6 is a schematic view of the initiation end in contact with the tow hook extension;
FIG. 7 is a perspective view of a steering column provided in accordance with an embodiment of the present invention;
FIG. 8 is an exploded view of the steering column;
fig. 9 is a perspective view of the first cam mounted on the handle.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 to 5, a cam assembly according to an embodiment of the present invention includes a first cam 1 having a first protrusion 11 and a first receiving groove 12, and a second cam 2 having a second protrusion 21 and a second receiving groove 22.
The second projection 21 is clearance-fitted in the first accommodation groove 12, and the first projection 11 is clearance-fitted in the second accommodation groove 22.
The groove bottom plate of the second receiving groove 22 includes a first bottom plate 221 and a second bottom plate 222 connected in a stepped shape, and the second bottom plate 222 is higher than the first bottom plate 221.
When the first protrusion 11 contacts the first base plate 221, the first cam 1 and the second cam 2 are in a released state. When the first protrusion 11 contacts the second base plate 222, the first cam 1 and the second cam 2 are in a locked state.
The second cam 2 is provided with an elastic member 4 capable of helping the locking of the first cam 1 and the second cam 2, the elastic member 4 has an initial position on the second cam 2, and when the elastic member 4 is in the initial position, the elastic member 4 is separated from the first cam 1.
The first cam 1 is provided with a towing hook 3 which can drive the elastic piece 4 to move and reset.
When the first cam 1 is driven in rotation in the locking direction, the towing hook 3 triggers the elastic element 4 to move away from the initial position, the elastic element 4 acting on the towing hook 3 and/or on one of the first protrusions 11 and helping to drive the first cam 1 in rotation in the locking direction.
When the first cam 1 is driven to rotate towards the loosening direction, the towing hook 3 can drive the elastic piece 4 to return to the initial position, and before the elastic piece 4 reaches the initial position, the elastic piece 4 can damp the rotation of the first cam 1 towards the loosening direction.
The cam assembly provided by the invention is mainly used on an adjusting handle of a steering column and plays a role in tightness adjustment.
The cam assembly comprises a first cam 1, a second cam 2, a towing hook 3 and an elastic element 4.
The first cam 1 is adapted to be mounted on the handle 7 shown in fig. 7-9, and the second cam 2 is adapted to be mounted on the first side plate 61 of the column support 6 shown in fig. 7-8. The second cam 2 remains fixed and can be referred to as a fixed cam; the first cam 1 is able to rotate and move axially relative to the second cam 2 under the drive of a handle 7, which may be referred to as a movable cam.
The side of the first cam 1 facing the second cam 2 has a plurality of first protrusions 11, and a first receiving groove 12 is formed between two adjacent first protrusions 11. The side of the second cam 2 facing the first cam 1 has a plurality of second protrusions 21, and a second receiving groove 22 is formed between two adjacent second protrusions 21. The number of the first protrusions 11 is equal to the number of the second protrusions 21. When assembled, the second protrusion 21 is clearance-fitted in the first accommodation groove 12, the first protrusion 11 is clearance-fitted in the second accommodation groove 22, the first accommodation groove 12 has a groove width larger than that of the second protrusion 21, the second accommodation groove 22 has a groove width larger than that of the first protrusion 11, and the first cam 1 is rotatable and axially movable relative to the second cam 2.
The groove bottom plate of the second receiving groove 22 is stepped and includes a first bottom plate 221 and a second bottom plate 222 connected to each other, wherein the second bottom plate 222 is higher than the first bottom plate 221, that is, a distance between the first bottom plate 221 and the first cam 1 is smaller than a distance between the first bottom plate 221 and the first cam 1. When the first convex part 11 rotates to enter the corresponding groove of the first base plate 221, the first convex part is contacted with the first base plate 221, the axial distance between the first cam 1 and the second cam 2 becomes smaller, the first cam 1 and the second cam 2 are loosened, the handle 7 is also in a loosened state, and the handle 7 can be moved to adjust the position or the angle of the guide sleeve 5 through the bolt 8. When the first protrusion 11 enters the corresponding groove of the second bottom plate 222, the first protrusion 11 contacts the second bottom plate 222, the axial distance between the first cam 1 and the second cam 2 becomes larger, the first cam 1 and the second cam 2 are locked, the bolt 8 is locked by the nut 81, and accordingly the handle 7 is also locked, so that the first side plate 61 and the second side plate 62 are held tightly to clamp the guide sleeve 5.
The elastic part 4 is pre-tightened on the second cam 2, on one hand, the elastic part provides assistance for the first cam 1 during locking rotation so as to help reduce the acting force on the handle 7, and on the other hand, the elastic part provides damping for the first cam 1 during releasing rotation so as to avoid abrupt change of force. The elastic member 4 has an initial position or initial state on the second cam 2, and the elastic member 4 in the initial position or initial state is separated from the first cam 1 and does not generate an acting force on the first cam 1.
The towing hook 3 is mounted on the first cam 1 for actuating the elastic member 4 to provide the assisting force and the returning force to provide the damping force.
When the operating handle 7 drives the first cam 1 to rotate towards the locking direction, the towing hook 3 rotates integrally with the first cam 1 and can be in contact with the elastic piece 4, so that the elastic piece 4 is triggered, one end of the elastic piece 4 leaves the initial position, a part of the elastic piece 4 can act on the towing hook 3, or act on one first convex part 11, or act on the towing hook 3 and one first convex part 11 simultaneously, and provides assistance for the locking rotation of the first cam 1, so as to help drive the first cam 1 to rotate towards the locking direction, so that the acting force on the handle 7 is reduced, the action of the elastic piece 4 can increase the loosening force of the handle 7, and the handle 7 is not easy to loosen in the locking state.
When the operating handle 7 drives the first cam 1 to rotate towards the loosening direction, the towing hook 3 drives the elastic piece 4 to reset, before the elastic piece 4 reaches the initial position, the elastic piece 4 damps the first cam 1 to rotate towards the loosening direction, and the first cam 1 is damped to rotate towards the loosening direction under the action of the elastic piece 4, so that the loosening force of the handle 7 cannot be instantly reduced, and the sudden feeling during operation cannot occur.
By adjusting the pretightening force of the elastic part 4, the loosening force and the locking force of the control handle 7 can be adjusted to meet the requirements of different working conditions.
In one embodiment, as shown in fig. 2 and 4-5, a ramp surface 223 is coupled to the first base 221 and the first base 222.
When the first cam 1 is driven to rotate toward the locking direction, the tow hook 3 triggers the elastic member 4 to leave the initial position when the first protrusion 11 climbs up via the slope surface 223 and contacts the first base plate 222.
When the first cam 1 is driven to rotate toward the releasing direction, the towing hook 3 drives the elastic member 4 to return to the initial position when the first protrusion 11 slides down the slope 223 and contacts the first bottom plate 221.
By providing the slope surface 223, it is convenient for the first protrusion 11 to switch positions between the first base plate 221 and the first base plate 222.
When the handle 7 is operated to rotate the first cam 1 in the locking direction, when the first protrusion 11 climbs up the slope 223 and contacts the first bottom plate 222, the axial distance between the first cam 1 and the second cam 2 is maximum, and at this time, the towing hook 3 triggers the elastic member 4 to move away from the initial position, and the elastic member 4 starts to act.
When the handle 7 is operated to rotate the first cam 1 in the loosening direction, when the first protrusion 11 slides down along the slope 223 and contacts the first bottom plate 221, the axial distance between the first cam 1 and the second cam 2 is minimum, the towing hook 3 drives the elastic member 4 to return to the initial position, and then the elastic member 4 is separated from the towing hook 3.
In one embodiment, as shown in fig. 3, the towing hook 3 is located inside one of the first protrusions 11, and does not interfere with the engagement of the first protrusion 11 with the second receiving recess 22.
In one embodiment, as shown in fig. 2 and 4-5, the elastic member 4 has an activation end 41 and a fixed end 42. The top surface of one of the second protrusions 21 has a top recess 211.
The fixed end 42 is fixed to one of the second protrusions 21, and the triggering end 41 is located in the top recess 211 and can be removed from the top recess 211 by the tow hook 3.
The elastic element 4 is preloaded between the two second protrusions 21, the fixed end 42 of the elastic element is fixed on one of the second protrusions 21, and the triggering end 41 of the elastic element is positioned in the top groove 211 of the other second protrusion 21, so that the elastic element can be conveniently ejected out by the towing hook 3, and therefore, acting force is generated on the first cam 1, and the elastic element can be conveniently driven by the towing hook 3 to reset.
In one embodiment, as shown in fig. 4-5, the side of the second protrusion 21 for mounting the fixed end 42 facing the adjacent first base 221 has a side recess 212. The fixing end 42 is mounted in the side recess 212 to facilitate the fixed mounting of the fixing end 42.
In one embodiment, the elastic member 4 is a torsion spring, which is simple in structure and convenient to assemble.
In one embodiment, as shown in fig. 2 to 6, the tow hook 3 includes a tow hook base 31 and a tow hook extension 32, the tow hook base 31 is connected with the first cam 1, and the tow hook extension 32 is connected with the tow hook base 31 in an L-shape.
In the axial direction along the first cam 1, the trigger end 41 is between the tow hook extension 32 and the first cam 1.
When the first cam 1 is driven to rotate towards the locking direction, when the first protrusion 11 comes into contact with the first bottom plate 222, the tow hook extension 32 comes into contact with the triggering end 41 and can push the triggering end 41 out of the top groove 211, and the triggering end 41 that is moved out of the top groove 211 acts on the tow hook base 31 and/or one of the first protrusions 11.
When the first cam 1 is driven to rotate towards the release direction, the tow hook base 31 comes into contact with the initiation end 41 to drive the initiation end 41 to return.
When the first protrusion 11 contacts the first bottom plate 222 during locking, the first cam 1 moves axially outward by a maximum distance, so as to drive the towing hook 3 to move axially outward by a maximum distance, so that the towing hook extension 32 ejects the triggering end 41 from the top groove 211, and the removed triggering end 41 will act on the towing hook base 31 and/or one of the first protrusions 11, which helps the first cam 1 to rotate towards the locking direction, and helps to reduce the force acting on the handle 7. When the trigger end 41 reaches the notch of the top groove 211, the base 31 of the tow hook automatically falls into the top groove 211 to complete the reset, when the first protrusion 11 contacts the first bottom plate 221, the first cam 1 moves axially inwards by a maximum distance, so as to drive the tow hook 3 to move axially inwards by a maximum distance, so that the tow hook extension 32 leaves the trigger end 41.
In one embodiment, as shown in fig. 6, the base projection for contacting the trigger end 41 is provided on the tow hook base 31, and the moving distance of the trigger end 41 when contacting the tow hook base 31 can be reduced, so that the trigger end 41 can maintain a large force on the tow hook base 31.
As shown in fig. 7 to 9, the steering column according to the embodiment of the present invention includes a guide sleeve 5, a column bracket 6, a handle 7 having a bolt 8, and a cam assembly according to any of the embodiments described above.
The column bracket 6 comprises a first side plate 61 and a second side plate 62 arranged at a distance, and the guide sleeve 5 is located between the first side plate 61 and the second side plate 62.
The first cam 1 is fixedly mounted on the handle 7 and the second cam 2 is fixedly mounted on the first side plate 61.
The bolt 8 passes through the first cam 1, the second cam 2, the first side plate 61, and the second side plate 62, and the bolt 8 is locked by a nut 81. The bolt 8 supports the guide sleeve 5.
The steering column provided by the invention comprises a guide sleeve 5, a column bracket 6, a handle 7, a bolt 8 and a cam assembly.
For the structure, structure and operation principle of the cam assembly, please refer to the description of the cam assembly above, and the description thereof is omitted.
The column support 6 is a downward-opening U-shaped support, and includes a first side plate 61 and a second side plate 62. The guide sleeve 5 is located between the first side plate 61 and the second side plate 62. The first side plate 61 and the second side plate 62 are provided with elongated through holes or arc-shaped through holes for movement of the bolts 8, so that when the handle 7 is loosened, the position and angle of the guide sleeve 5 can be adjusted by adjusting the position of the bolt 8. For this part, reference is made to the description in the prior art, and the description is not repeated here.
One end of the bolt 8 is connected to the handle 7. The first cam 1 is fixedly mounted on the handle 7, and the bolt 8 penetrates through the first cam 1. The second cam 2 is fixedly mounted on the first side plate 62.
During assembly, the bolt 8 sequentially passes through the first cam 1, the second cam 2, the first side plate 61 and the second side plate 62, and is then locked by the nut 81. The bolt 8 is located below the guide sleeve 5 for supporting the guide sleeve 5.
According to the steering column provided by the invention, the elastic piece 4 is arranged on the second cam 2, the towing hook 3 is arranged on the first cam 1, when the operating handle 7 is locked, the first cam 1 rotates towards the locking direction, the elastic piece 4 is triggered by the towing hook 3, acting force can be provided for the first cam 1 to help the first cam 1 to rotate towards the locking direction, so that the acting force on the handle 7 is reduced, the loosening force of the handle 7 can be increased under the action of the elastic piece 4, and the first cam is not easy to loosen when the handle 7 is in the locking state. When the operating handle 7 is loosened, the first cam 1 rotates towards the loosening direction, and the first cam 1 is damped to rotate towards the loosening direction under the action of the elastic piece 4, so that the loosening force of the operating handle 7 cannot be instantaneously reduced, and the abrupt feeling during operation cannot occur.
In one embodiment, as shown in fig. 7-8, a U-shaped frame 9 with an upward opening is arranged between the first side plate 61 and the second side plate 62, and the bolt 8 passes through the U-shaped frame 9; the guide sleeve 5 is at least partly in the U-shaped frame 9 to provide a stop for the guide sleeve 5.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.
Claims (10)
1. A cam assembly is characterized by comprising a first cam with a first convex part and a first containing groove and a second cam with a second convex part and a second containing groove;
the second boss is clearance-fitted in the first receiving groove, and the first boss is clearance-fitted in the second receiving groove;
the groove bottom plate of the second accommodating groove comprises a first bottom plate and a second bottom plate which are connected in a step shape, and the second bottom plate is higher than the first bottom plate;
when the first convex part is in contact with the first bottom plate, the first cam and the second cam are in a release state; when the first convex part is contacted with the second bottom plate, the first cam and the second cam are in a locking state;
the second cam is provided with an elastic piece which can help the first cam and the second cam to be locked, the elastic piece has an initial position on the second cam, and when the elastic piece is at the initial position, the elastic piece is separated from the first cam;
the first cam is provided with a towing hook capable of driving the elastic piece to move and reset;
when the first cam is driven to rotate towards the locking direction, the tow hook triggers the elastic piece to leave the initial position, and the elastic piece acts on the tow hook and/or one first convex part and helps to drive the first cam to rotate towards the locking direction;
when the first cam is driven to rotate towards the loosening direction, the towing hook can drive the elastic piece to reset to the initial position, and before the elastic piece reaches the initial position, the elastic piece can damp the first cam to rotate towards the loosening direction.
2. The cam assembly of claim 1, wherein a ramp surface is coupled to the first floor and the second floor;
when the first cam is driven to rotate towards the locking direction, the towing hook triggers the elastic piece to leave the initial position when the first convex part climbs up the slope and contacts with the second bottom plate;
when the first cam is driven to rotate towards the loosening direction, the towing hook drives the elastic piece to return to the initial position when the first convex part slides down through the slope surface and is in contact with the first bottom plate.
3. The cam assembly of claim 1, wherein the tow hook is inboard of the one of the first lobes.
4. The cam assembly of claim 1 or 2, wherein the resilient member has an initiation end and a fixed end;
the top surface of one of the second protrusions is provided with a top groove;
the fixed end is fixed on one of the second protrusions, and the trigger end is positioned in the top groove and can be moved out of the top groove by the towing hook.
5. The cam assembly of claim 4, wherein a side of the second protrusion for mounting the fixed end facing the adjacent first floor has a side groove;
the fixed end is installed in the side groove.
6. The cam assembly of claim 5, wherein the resilient member is a torsion spring.
7. The cam assembly of claim 4, wherein the tow hook comprises a tow hook base and a tow hook extension, the tow hook base being connected to the first cam, the tow hook extension being connected to the tow hook base in an L-shape;
said trigger end being between said tow hook extension and said first cam in an axial direction along said first cam;
when said first cam is driven to rotate towards a locking direction, said tow hook extension contacts said firing end and is able to push said firing end out of said top recess when said first protrusion contacts said second floor, said firing end moving out of said top recess acting on said tow hook base and/or one of said first protrusions;
when the first cam is driven to rotate towards the loosening direction, the towing hook base is contacted with the trigger end to drive the trigger end to reset.
8. The cam assembly of claim 7, wherein the tow hook base is provided with a base boss thereon for contacting the initiation end.
9. A steering column comprising a guide sleeve, a column support, a handle having a bolt, and the cam assembly of any one of claims 1-7;
the pipe string support comprises a first side plate and a second side plate which are arranged at intervals, and the guide sleeve is positioned between the first side plate and the second side plate;
the first cam is fixedly arranged on the handle, and the second cam is fixedly arranged on the first side plate;
the bolt penetrates through the first cam, the second cam, the first side plate and the second side plate, and the bolt is locked through a nut;
the bolt supports the guide sleeve.
10. A steering column according to claim 9 in which an upwardly opening U-shaped bracket is provided between the first and second side plates, the bolt passing through the U-shaped bracket;
the guide sleeve is at least partially disposed in the U-shaped frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110194052.7A CN114954625B (en) | 2021-02-20 | 2021-02-20 | Cam assembly and steering column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110194052.7A CN114954625B (en) | 2021-02-20 | 2021-02-20 | Cam assembly and steering column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114954625A true CN114954625A (en) | 2022-08-30 |
| CN114954625B CN114954625B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110194052.7A Active CN114954625B (en) | 2021-02-20 | 2021-02-20 | Cam assembly and steering column |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5570610A (en) * | 1995-06-30 | 1996-11-05 | General Motors Corporation | Adjustable steering column |
| US20090114055A1 (en) * | 2007-11-05 | 2009-05-07 | Trw Automotive U.S. Llc | Steering column locking mechanism |
| CN102076548A (en) * | 2008-06-30 | 2011-05-25 | Zf转向系统纳卡姆公司 | Device assisting with the locking of a steering column |
| CN103963822A (en) * | 2014-05-23 | 2014-08-06 | 安徽江淮汽车股份有限公司 | Steering column fixing mechanism |
| GB2521518A (en) * | 2013-10-24 | 2015-06-24 | Trw Ltd | Steering column assembly |
| CN106004979A (en) * | 2016-07-12 | 2016-10-12 | 广州汽车集团股份有限公司 | Four-way adjusting mechanism for steering column |
| CN106976475A (en) * | 2016-01-18 | 2017-07-25 | 上海汽车集团股份有限公司 | Vehicle and its steering, adjustable steering column |
| CN108248674A (en) * | 2016-12-28 | 2018-07-06 | 长城汽车股份有限公司 | Damper assembly, locking assembly, support member, steering column and its locking device |
| CN210852620U (en) * | 2019-08-28 | 2020-06-26 | 北京汽车股份有限公司 | Steering column adjusting and locking device and vehicle |
-
2021
- 2021-02-20 CN CN202110194052.7A patent/CN114954625B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5570610A (en) * | 1995-06-30 | 1996-11-05 | General Motors Corporation | Adjustable steering column |
| US20090114055A1 (en) * | 2007-11-05 | 2009-05-07 | Trw Automotive U.S. Llc | Steering column locking mechanism |
| CN102076548A (en) * | 2008-06-30 | 2011-05-25 | Zf转向系统纳卡姆公司 | Device assisting with the locking of a steering column |
| GB2521518A (en) * | 2013-10-24 | 2015-06-24 | Trw Ltd | Steering column assembly |
| CN103963822A (en) * | 2014-05-23 | 2014-08-06 | 安徽江淮汽车股份有限公司 | Steering column fixing mechanism |
| CN106976475A (en) * | 2016-01-18 | 2017-07-25 | 上海汽车集团股份有限公司 | Vehicle and its steering, adjustable steering column |
| CN106004979A (en) * | 2016-07-12 | 2016-10-12 | 广州汽车集团股份有限公司 | Four-way adjusting mechanism for steering column |
| CN108248674A (en) * | 2016-12-28 | 2018-07-06 | 长城汽车股份有限公司 | Damper assembly, locking assembly, support member, steering column and its locking device |
| CN210852620U (en) * | 2019-08-28 | 2020-06-26 | 北京汽车股份有限公司 | Steering column adjusting and locking device and vehicle |
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| Publication number | Publication date |
|---|---|
| CN114954625B (en) | 2023-08-04 |
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