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CN-224213974-U - Forced cam resetting structure

CN224213974UCN 224213974 UCN224213974 UCN 224213974UCN-224213974-U

Abstract

The utility model discloses a forced cam resetting structure which comprises a base, a handle body and a driving cam, wherein the handle body can move between a storage state and an extension state relative to the base, a push rod is arranged on the base in a sliding mode, the handle body is connected with the push rod through a swing arm, the push rod comprises a driving part, a roller is arranged at the end portion of the driving part in a rotating mode, the roller is attached to the outer wall of the driving cam and is in rolling fit with the outer wall of the driving cam, a track rib extends from the edge of the driving cam, the track rib comprises a spiral guide section, a guide pillar is arranged on one side, facing the driving cam, of the driving part, and the guide pillar is in guiding sliding fit with the inner wall of the spiral guide section. The utility model can realize the purpose of forced switching of the handle main body between the storage state and the extending state through the positive and negative rotation of the driving cam, and has the effects of being difficult to be blocked between the driving cam and the push rod and prolonging the service life.

Inventors

  • QI JINGCHAO
  • YAN QIAOLING
  • HU JINYAO

Assignees

  • 宁波华德汽车零部件有限公司

Dates

Publication Date
20260508
Application Date
20250424

Claims (10)

  1. 1. The forced cam resetting structure comprises a base (1) and a handle main body (2), wherein the handle main body (2) can move between a storage state and an extension state relative to the base (1), a push rod (3) is arranged on the base (1) in a sliding mode, and the handle main body (2) is connected with the push rod (3) through a transmission assembly (4), and the forced cam resetting structure is characterized by further comprising a driving cam (5), wherein the push rod (3) comprises a driving part (31) close to one side of the driving cam (5), a roller (311) is rotatably arranged at the end part of the driving part (31), and the roller (311) is attached to the outer wall of the driving cam (5) and is in rolling fit with the outer wall of the driving cam; The edge of the driving cam (5) is extended with a track rib (51), the track rib (51) comprises a spiral guide section (511), a guide pillar (312) is arranged on one side of the driving part (31) towards the driving cam (5), and the guide pillar (312) is in guide sliding fit with the inner wall of the spiral guide section (511).
  2. 2. A cam forced return structure according to claim 1 wherein the spiral guide section (511) has a gradual radius and the radius of curvature of the spiral guide section (511) gradually increases from the proximal end (501) toward the distal end (502) of the drive cam (5).
  3. 3. A cam forced return structure according to claim 2 wherein the track rib (51) includes a screw start section (512) connected to the screw guide section (511), the screw start section (512) is disposed near a proximal end (501) of the driving cam (5), and a curvature of the screw start section (512) is larger than a curvature of the screw guide section (511).
  4. 4. A cam forced return structure according to claim 2 wherein said track rib (51) comprises an arc-shaped anti-drop section (513) connected to said spiral guide section (511), said arc-shaped anti-drop section (513) being disposed adjacent to a distal end (502) of said drive cam (5).
  5. 5. A cam forced return structure according to claim 1 wherein the side wall of the driving cam (5) is provided with a stop surface (52), and when the handle body (2) moves to the storage state, the driving cam (5) is stopped by the stop surface (52) and the side wall of the push rod (3).
  6. 6. The structure for forcibly resetting the cam according to claim 5, wherein the driving cam (5) is provided with a avoiding groove (53) on a side close to the stop surface (52), and the roller (311) is in avoiding fit with the avoiding groove (53) when the handle body (2) moves to the storage state.
  7. 7. The forced cam resetting structure as claimed in claim 1, further comprising a driving device (6), wherein the driving device (6) comprises a mounting shell (61), a motor (62) arranged in the mounting shell (61), a worm (63) and a worm wheel (64), the worm (63) is meshed with the worm wheel (64), the worm (63) is connected to an output shaft of the motor (62), a rotating driving shaft (54) is arranged at a rotating center of the driving cam (5), and the worm wheel (64) is coaxially and fixedly connected to the rotating driving shaft (54).
  8. 8. A positive return structure according to claim 7 wherein an angle limiting structure is provided between the mounting housing (61) and the driving cam (5), the angle limiting structure being adapted to restrict rotation of the driving cam (5) relative to the mounting housing (61) when the driving cam (5) rotates and urges the handle body (2) to an extended or retracted state.
  9. 9. The cam forced resetting structure as claimed in claim 8, wherein the angle limiting structure comprises a limiting convex part (55) and a stop block (611), the limiting convex part (55) is arranged on one side of the driving cam (5) away from the track rib (51), the stop block (611) is arranged on the mounting shell (61), and the stop block (611) comprises a first end surface (6111) facing the proximal end (501) of the driving cam (5) and a second end surface (6112) facing the distal end (502) of the driving cam (5); when the handle main body (2) moves to an extending state, the limit protrusion (55) is in stop fit with the first end surface (6111) of the stop block (611); When the handle body (2) moves to the storage state, the limit protrusion (55) is in stop fit with the second end face (6112) of the stop block (611).
  10. 10. The forced cam resetting structure of claim 1, wherein the base (1) is provided with a sliding groove (11) along the length direction, the push rod (3) is slidably arranged in the sliding groove (11), the base (1) is provided with track grooves (12) on two side walls of the sliding groove (11), the track grooves (12) are communicated with the sliding groove (11), two sides of the push rod (3) are provided with sliding blocks (32) corresponding to the track grooves (12), and the sliding blocks (32) are in guiding sliding fit with the track grooves (12).

Description

Forced cam resetting structure Technical Field The utility model relates to the technical field of automobile door handles, in particular to a cam forced resetting structure. Background The prior art patent with the publication number of CN210217430U discloses a hidden automobile outer door handle structure, the handle comprises a handle main body, a first mounting part and a second mounting part are respectively arranged on two sides of the handle main body, the actuating device further comprises a shell, an actuating rod is hinged to the shell, the front end of the actuating rod is hinged to the first mounting part of the handle, a push rod is slidably arranged on the shell, an unlocking rod is slidably connected to the shell, the head of the push rod is contacted with the tail surface of the unlocking rod, the front end of the unlocking rod is hinged to the second mounting part of the handle, a guide structure for guiding the push rod and the unlocking rod is arranged on the shell, the actuating device further comprises a driving mechanism for pushing the push rod to slide and pushing the actuating rod to swing, a locking ring is hinged to the door, a matching piece matched with the locking ring to drive the locking ring to rotate is arranged on the door, the locking ring is connected with an unlocking slide lock of the door, the actuating device further comprises a resetting structure for resetting the locking ring, the unlocking rod, the push rod and the actuating rod, the resetting structure comprises a first torsion spring and a second torsion spring, the driving mechanism comprises a motor and a pushing block extending from the motor or retracting, and the pushing block pushes the push rod to push the swing. The door handle has the following defects that the push block at the head directly pushes the push rod to drive the actuating rod and the unlocking rod to rotate in the unlocking direction so as to push the handle out of the shell, but the push block can only push the push rod to move in the unlocking direction, the reset of the push rod is realized through the first torsion spring and the second torsion spring, and after the door handle is used for a long time, the first torsion spring and the second torsion spring can reduce or lose efficacy due to corrosion and aging, so that the situation that the handle cannot be completely reset occurs, and the improvement is needed. Disclosure of utility model The utility model aims to provide a cam forced resetting structure, which can realize the purpose of forced switching of a handle main body between a storage state and an extension state through the positive and negative rotation of a driving cam and has the effects of being difficult to be blocked between the driving cam and a push rod and prolonging the service life. The technical aim of the utility model is achieved by the following technical scheme that the cam forced resetting structure comprises a base and a handle main body, wherein the handle main body can move between a storage state and an extension state relative to the base, a push rod is arranged on the base in a sliding manner, the handle main body is connected with the push rod through a transmission assembly, the cam forced resetting structure further comprises a driving cam, the push rod comprises a driving part close to one side of the driving cam, a roller is rotatably arranged at the end part of the driving part, and the roller is attached to the outer wall of the driving cam and is in rolling fit with the outer wall of the driving cam; The edge of the driving cam is extended with a track rib, the track rib comprises a spiral guide section, a guide pillar is arranged on one side of the driving part, facing the driving cam, of the driving part, and the guide pillar is in guide sliding fit with the inner wall of the spiral guide section. Through the technical scheme, when the handle main body is in the storage state, the idler wheel is close to the rotation center of the driving cam, the driving cam is controlled to rotate at the moment, the guide pillar slides along the arc surface of the inner wall of the spiral guide section in a guiding way, the idler wheel of the driving part always rolls along the outer wall of the inner concave part of the driving cam, so that the guide pillar is far away from the driving cam along the track rib, the push rod is driven to move on the base towards the unlocking direction of the handle main body, the push rod drives the handle main body to move to the extending state through the swing arm, when the handle main body is in the extending state, the idler wheel is in the position far away from the rotation center of the driving cam, the driving cam is controlled to reversely rotate at the moment, the idler wheel rolls along the outer wall of the outer part of the driving cam, the guide pillar moves close to the rotation center of the driving cam along the arc surface of the inner wall of the spira