Car limiter

Abstract

The purpose of the present invention is to provide a car limiter that can realize electric opening and closing of a car door. To achieve the above purpose, the present invention adopts the following technical scheme: a car limiter, including a driving mechanism, a limit arm, a door fixing seat and a body fixing seat, one end of the limit arm in the length direction is always fixed in a shell, the other end of the limit arm in the length direction extends out of the shell and is fixed to the body fixing seat, the shell is fixed to the door fixing seat, the limit arm is linked to the driving mechanism, the driving mechanism includes a driving motor, and the limit arm moves along the length direction under the action of the driving mechanism to adjust the length of the limit arm located outside the shell.

Description

Technical Field

[0001] The invention relates to an automobile limiter for opening and closing an automobile door, and in particular to an automobile limiter capable of realizing automatic opening and closing of the automobile door. Background Art

[0002] The invention patent with application number 201711057448.7 discloses a car limiter for opening and closing car doors, but this limiter can only be used to limit the opening angle of the door, and the door must be opened manually by the user. Summary of the invention

[0003] The purpose of the present invention is to provide a vehicle limiter capable of realizing electric opening and closing of a vehicle door.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a car limiter, including a driving mechanism, a limit arm, a door fixing seat and a body fixing seat, one end of the limit arm in the length direction is always fixed in the shell, the other end of the limit arm in the length direction extends out of the shell and is fixed to the body fixing seat, the shell is fixed to the door fixing seat, the limit arm is linked to the driving mechanism, the driving mechanism includes a driving motor, and the limit arm moves along the length direction under the action of the driving mechanism to adjust the length of the limit arm located outside the shell.

[0005] The present invention controls the movement of the limit arm along the length direction by driving the motor, thereby realizing the opening and closing of the door, making the car more functional and improving the comfort of the passengers. The limiter of the present invention is installed in the same way as a conventional limiter, the housing and the driving mechanism are installed inside the door, and one end of the limit arm passes through the door and is fixed to the vehicle body through the vehicle body fixing seat. The axial movement of the limit arm can be realized in a variety of ways.

[0006] Preferably, a first transmission member is provided in the housing, and a meshing transmission structure cooperating with each other is provided between the first transmission member and the limit arm. The first transmission member is fixed in the housing through a first bearing, and the driving mechanism drives the first transmission member to rotate so that the limit arm performs axial reciprocating motion. The present invention uses a gear meshing transmission to achieve axial movement of the limit arm, which requires a smaller installation space, is easier to put into the door, and can be applied to more vehicle models. Among them, a screw transmission structure or a gear rack transmission structure can be used between the first transmission member and the limit arm.

[0007] Preferably, the first transmission member is sleeved on the limit arm, and a threaded structure that cooperates with each other is provided between the circumferential outer wall of the limit arm and the circumferential inner wall of the first transmission member, and the circumferential outer wall of the limit arm has an external thread to form a screw rod structure. The above arrangement makes the axial movement of the limit arm more stable, and compared with the electric strut, the present invention is shorter and easier to place in the door.

[0008] Preferably, the driving mechanism comprises a driving motor and a reduction mechanism, wherein the output end of the reduction mechanism is provided with a second transmission member, and the second transmission member is meshed with the first transmission member. The reduction mechanism is provided to reduce the rotation speed and increase the torque so that the heavier door can be opened and closed.

[0009] Preferably, a worm gear structure that cooperates with each other is provided between the first transmission member and the second transmission member, a spiral tooth structure is formed on the circumferential outer wall of the second transmission member to constitute a worm in the worm gear structure, a tooth structure meshing with the threaded tooth structure is formed on the circumferential outer wall of the first transmission member to constitute a worm in the worm gear structure, the worm gear structure is a non-self-locking worm gear structure, and the second transmission member is a multi-head worm structure; the second transmission member is fixed to the inner ring of the second bearing, and the outer ring of the second bearing is fixed to the inner wall of the housing; both axial ends of the second transmission member are fixed to the inner ring of a second bearing.

[0010] The above arrangement enables the vehicle door of the present invention to be opened by manual pushing. The first transmission member and the second transmission member are non-self-locking worm gear structures, and the first transmission member and the second transmission member are not self-locking. The limit arm is supported by the worm gear structure, and the limit arm is limited by the cooperation between the first transmission member, the first bearing and the housing.

[0011] Preferably, the reduction mechanism includes a planetary reduction mechanism, an output sun gear is provided at the output end of the planetary reduction mechanism, the output sun gear is circumferentially meshed with two output planetary gears, the output planetary gears are fixed to the output planetary carrier plate through a wheel axle, the output sun gear rotates to make the output planetary carrier plate rotate around the output sun gear, and one of the two output planetary gears is meshed with the second transmission member.

[0012] The planetary reduction mechanism is adopted to make the size of the limiter of the present invention smaller. The two output planetary gears are used for the extension and retraction of the limit arm respectively, and the two output planetary gears are not meshed with the second transmission member at the same time, so that there is a distance between the second transmission member and the two output planetary carriers, so that the occupants can manually open and close the door.

[0013] Preferably, the output planetary carrier plate has a plurality of trigger protrusions extending circumferentially outward, and a plurality of control switches are provided on the circumferential outer side of the output planetary carrier plate, the control switches are used to control the start and stop of the drive motor, and the output planetary carrier plate rotates to make the trigger protrusion contact or disengage with the control switch; the number of the trigger protrusion and the control switch are both one, and when the output planetary gears are disengaged from each other from the second transmission member, the control switch contacts the outer end surface of the trigger protrusion; when the control switch and the trigger protrusion are disengaged from each other, one of the two output planetary gears engages with the second transmission member; or the number of the trigger protrusion and the control switch are both one, and when the output planetary gears are disengaged from each other from the second transmission member, the control switch disengages from the outer end surface of the trigger protrusion; when the control switch and the trigger protrusion are in contact with each other, one of the two output planetary gears engages with the second transmission member.

[0014] By setting a control switch, the output planet carrier plate and the two output planetary wheels can be reset, so that after the drive motor stops, no output planetary wheel will contact the second transmission member, so that the door can be opened and closed manually by the occupant.

[0015] Preferably, two limit protrusions are provided in the shell for limiting the moving distance of the output planetary gear when it rotates around the sun gear. When the output sun gear rotates so that the output planetary carrier plate contacts one limit protrusion, one output planetary gear engages with the second transmission member; when the output sun gear reverses so that the output planetary carrier plate contacts the other limit protrusion, the other output planetary gear engages with the second transmission member.

[0016] The two limiting protrusions (or the groove formed between the two limiting protrusions) are used to limit the forward and reverse rotation angles of the planet carrier plate to prevent the output planetary gear from exerting pressure on the second transmission member, so as to make the transmission between the driving mechanism and the limiting arm smoother.

[0017] Preferably, the door fixing seat includes a first fixing seat and a second fixing seat, the first fixing seat is fixed to the door, and the second fixing seat is rotatably fixed to the first fixing seat, the first fixing seat is located between the vehicle body fixing seat and the second fixing seat, and the shell is fixed to the second fixing seat, the limiting arm is arranged horizontally, and a vertically arranged rotating shaft is arranged between the first fixing seat and the second fixing seat, and the second fixing seat can rotate around the rotating shaft; the first fixing seat and the second fixing seat both include a vertically arranged fixing plate, the fixing plate of the first fixing seat is used to be fixed to the door, and the fixing plate of the second fixing seat is fixed to the shell, and connecting plates are arranged at the upper and lower ends of the fixing plates, and the connecting plate of the first fixing seat can be rotatably fixed to the connecting plate of the second fixing seat through the rotating shaft; the rotating shaft and the connecting plate are fixed by shaft riveting; the first fixing seat and the second fixing seat are both provided with a clearance groove for making way for the limiting arm.

[0018] The door fixing seat is composed of two parts. The first fixing seat and the second fixing seat can rotate relative to each other, so that the limit arm can make correction swings around the upper and lower axes during movement, so as to make the opening and closing of the door smoother.

[0019] Preferably, the vehicle body fixing seat comprises a vehicle body fixing seat body, a vertically arranged ball head rod is provided on the vehicle body fixing seat body, a ball head is provided at the end of the ball head rod, a ball head seat is fixed at the end of the limiting arm, the ball head seat has a receiving groove opening upward or downward to accommodate the ball head, and an anti-slip structure for preventing the ball head from slipping out is provided at the opening of the receiving groove. The above arrangement allows the angle adjustment range of the limiting arm to be wider, so that the opening and closing of the door are smoother. Among them, the opening width of the receiving groove can be made smaller than the maximum diameter of the ball head, or a ring-shaped spring piece passed by the ball head rod can be fixed at the opening of the receiving groove to limit the ball head from slipping out of the ball head seat.

[0020] The present invention has the advantages of being able to realize electric opening and closing of the vehicle door, and retains the function of manual opening and closing of the vehicle door. The present invention also has the advantages of smoother opening and closing of the vehicle door, small size and applicable to a wider range of vehicle models. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A structural schematic diagram of the present invention;

[0022] Figure 2 A cross-sectional view of the present invention;

[0023] Figure 3 A schematic diagram of the structure of the present invention after removing part of the shell;

[0024] Figure 4 Another cross-sectional view of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below based on the accompanying drawings and specific embodiments.

[0026] Depend on Figures 1 to 4 As shown, an automobile limiter of the present invention comprises a driving mechanism 1, a limit arm 2, a door fixing seat 3 and a body fixing seat 4, the driving mechanism 1 is fixed to the shell 20, one end of the limit arm 2 in the length direction is always fixed in the shell 20, the other end of the limit arm 2 in the length direction extends out of the shell 20 and is fixed to the body fixing seat 4, the shell 20 is fixed to the door fixing seat 3, the limit arm 2 is linked to the driving mechanism 1, the driving mechanism 1 comprises a driving motor 11, and the limit arm 2 moves along the length direction under the action of the driving mechanism 1 to adjust the length of the limit arm 2 located outside the shell 20.

[0027] The door fixing seat 3 includes a first fixing seat 31 and a second fixing seat 32. The first fixing seat 31 is fixed to the door, and the second fixing seat 32 is rotatably fixed to the first fixing seat 31. The first fixing seat 31 is located between the vehicle body fixing seat 4 and the second fixing seat 32, and the housing 20 is fixed to the second fixing seat 32. The limiting arm 2 is arranged horizontally, and a vertically arranged rotating shaft 33 is arranged between the first fixing seat 31 and the second fixing seat 32. The second fixing seat 32 can rotate around the rotating shaft 33. The first fixing seat 31 and the second fixing seat 32 both include a vertically arranged fixing plate 34. The fixing plate of the first fixing seat 31 is used to fix to the door, and the fixing plate of the second fixing seat 32 is fixed to the housing 20. The fixing plate 34 is provided with connecting plates 35 at both ends. The connecting plate of the first fixing seat 31 can be rotatably fixed to the connecting plate of the second fixing seat 32 through the rotating shaft 33; the upper and lower rotating shafts 33 are fixed to the connecting plate of the first fixing seat 31 and the connecting plate of the second fixing seat 32 by shaft riveting. The fixing plate of the first fixing seat 31 and the fixing plate of the second fixing seat 32 are both provided with a making way groove 36 for making way for the limiting arm 2 .

[0028] The vehicle body fixing seat 4 includes a vehicle body fixing seat body 41, on which a vertically arranged ball head rod 42 is provided, and a ball head 43 is provided at the end of the ball head rod 42. A ball head seat 44 is fixed to the end of the limiting arm 2. The ball head seat 33 has a receiving groove that opens upward or downward to accommodate the ball head 43, and an anti-slip structure is provided at the opening of the receiving groove to prevent the ball head from slipping out.

[0029] A first transmission member 5 is provided in the housing 20, and a meshing transmission structure that cooperates with the limiting arm 2 is provided between the first transmission member 5 and the limiting arm 2. The first transmission member 5 is fixed in the housing 20 through the first bearing 21, and the driving mechanism 1 drives the first transmission member 5 to rotate so that the limiting arm 2 performs axial reciprocating motion. The first transmission member 5 is annular and sleeved on the limiting arm 2, and a threaded structure that cooperates with each other is provided between the circumferential outer wall of the limiting arm 2 and the circumferential inner wall of the first transmission member 5, and the circumferential outer wall of the limiting arm 2 has an external thread to form a screw rod structure.

[0030] The driving mechanism 1 includes a driving motor 11 and a reduction mechanism. The output end of the reduction mechanism is provided with a second transmission member 6, which meshes with the first transmission member 5. A worm gear structure that cooperates with each other is provided between the first transmission member 5 and the second transmission member 6. A spiral tooth structure is formed on the circumferential outer wall of the second transmission member 6 to form a worm in the worm gear structure. A tooth structure meshing with the threaded tooth structure is formed on the circumferential outer wall of the first transmission member 5 to form a worm in the worm gear structure. The worm gear structure is a non-self-locking worm gear structure, and the second transmission member 6 is a multi-head worm structure. The second transmission member 6 is fixed to the inner ring of the second bearing 22, the outer ring of the second bearing 22 is fixed to the inner wall of the housing 20, and both axial ends of the second transmission member 6 are fixed to the inner ring of a second bearing 22.

[0031] The reduction mechanism includes a planetary reduction mechanism 10, and an output sun gear 12 is provided at the output end of the planetary reduction mechanism 10. The output sun gear 12 is circumferentially meshed with two output planetary gears 13. The output planetary gears 13 are fixed to the output planetary carrier plate 14 through the wheel shaft. The output sun gear 12 rotates to make the output planetary carrier plate 14 rotate around the output sun gear, and one of the two output planetary gears 13 is meshed with the second transmission member 6. An input gear 61 for meshing with the output planetary gear 13 is fixed on the second transmission member 6, or a tooth structure for meshing with the output planetary gear 13 is formed on the circumferential outer wall of the second transmission member 6.

[0032] The output planet carrier plate 14 has a plurality of trigger protrusions 15 extending outwardly in the circumferential direction, and a plurality of control switches 16 are arranged on the circumferential outer side of the output planet carrier plate 14. The control switch 16 is used to control the start and stop of the drive motor 11. The output planet carrier plate 14 rotates to make the trigger protrusion 15 contact or disengage with the control switch 16. There is one trigger protrusion 15 and one control switch 16. When the output planetary gears 13 are disengaged from the second transmission member 6, the control switch 16 is disengaged from the outer end surface of the trigger protrusion 15. When the control switch 16 is in contact with the trigger protrusion 15, only one of the two output planetary gears 13 is meshed with the second transmission member 6. The control switch 16 can be a contact travel switch.

[0033] Two limiting protrusions 23 are provided in the housing 20 for limiting the moving distance of the output planetary gear when it rotates around the sun gear (for limiting the rotation angle of the output planetary carrier plate). When the output sun gear 12 rotates so that the output planetary carrier plate 14 contacts one limiting protrusion 23, one output planetary gear 13 engages with the second transmission member 6; when the output sun gear 12 reverses so that the output planetary carrier plate 14 contacts the other limiting protrusion 23, the other output planetary gear 13 engages with the second transmission member 6.

[0034] When installing the present invention, a conventional limiter is used to install the present invention, so that the body fixing seat is fixed to the body, the door fixing seat is fixed to the door, and the driving mechanism of the present invention is located in the shell.

[0035] When the door needs to be opened electrically, the passenger or driver presses a button or sends a signal in other ways to rotate the output shaft of the drive motor of the present invention to one side, and then the output planetary carrier plate contacts the contact end of the touch switch, and the output planetary gear drives the output planetary carrier plate to rotate so that the touch protrusion and the limit protrusion are against each other. At this time, the second transmission member is engaged with an output planetary gear, so as to realize the extension of the limit arm to realize the opening of the door. Among them, after judging that the door is fully opened by various methods, the drive motor can be reset so that the output planetary gear does not contact the second transmission member, so that the door can be closed manually at this time, and the force required for closing the door is less.

[0036] When the door needs to be closed electrically, the passenger or driver presses a button or sends a signal in other ways to rotate the output shaft of the drive motor of the present invention to the other side, so that the other output planetary gear is engaged with the second transmission member, thereby achieving the inward retraction of the limit arm to achieve the closing of the door. After the door is closed, the drive motor is reset to disengage the output planetary gear from the second transmission member.

[0037] Among them, a non-self-locking worm gear structure is adopted between the driving motor and the limiting arm of the present invention. Even if the driving motor loses power and is not reset, the door can be pushed open with a small force after the door lock is opened.

[0038] The present invention has the advantages of being able to realize electric opening and closing of the vehicle door, and retains the function of manual opening and closing of the vehicle door. The present invention also has the advantages of smoother opening and closing of the vehicle door, small size and applicable to a wider range of vehicle models.

Claims

1. A car limiter, characterized in that It includes a driving mechanism, a limiting arm, a door fixing seat and a body fixing seat, one end of the limiting arm in the length direction is always fixed in the shell, the other end of the limiting arm in the length direction extends out of the shell and is fixed to the body fixing seat, the shell is fixed to the door fixing seat, the limiting arm is linked with the driving mechanism, the driving mechanism includes a driving motor, and the limiting arm moves along the length direction under the action of the driving mechanism to adjust the length of the limiting arm outside the shell; A first transmission member is provided in the housing, the first transmission member is sleeved on the limit arm, a meshing transmission structure that cooperates with the limit arm is provided between the first transmission member and the limit arm, the first transmission member is fixed in the housing through a first bearing, and the driving mechanism drives the first transmission member to rotate so that the limit arm performs axial reciprocating motion; The driving mechanism comprises a driving motor and a reduction mechanism, and the output end of the reduction mechanism is provided with a second transmission member, and the second transmission member is meshed with the first transmission member; The reduction mechanism comprises a planetary reduction mechanism, an output sun gear is provided at the output end of the planetary reduction mechanism, the output sun gear is circumferentially meshed with two output planetary gears, the output planetary gears are both fixed to the output planetary carrier plate through the wheel shaft, the output sun gear rotates to make the output planetary carrier plate rotate around the output sun gear, and one of the two output planetary gears is meshed with the second transmission member; The output planet carrier plate has a plurality of trigger protrusions extending outwardly in the circumferential direction, and a plurality of control switches are arranged on the circumferential outer side of the output planet carrier plate, the control switches are used to control the start and stop of the drive motor, and the output planet carrier plate rotates to make the trigger protrusions contact or disengage with the control switches; The number of the touch protrusion and the control switch are both one, and when the output planetary gears are disengaged from the second transmission member, the control switch contacts the outer end surface of the touch protrusion; when the control switch and the touch protrusion are disengaged from each other, one of the two output planetary gears is meshed with the second transmission member; Or the number of the trigger protrusion and the control switch are both one, and when the output planetary gears are disengaged from the second transmission member, the control switch is disengaged from the outer end surface of the trigger protrusion; when the control switch and the trigger protrusion are in contact with each other, one of the two output planetary gears is engaged with the second transmission member.

2. The vehicle limiter according to claim 1, characterized in that A threaded structure that matches each other is arranged between the circumferential outer wall of the limiting arm and the circumferential inner wall of the first transmission member, and the circumferential outer wall of the limiting arm has an external thread to present a screw-shaped structure.

3. The vehicle limiter according to claim 1, characterized in that A worm gear structure that cooperates with each other is provided between the first transmission member and the second transmission member, a helical tooth structure is formed on the circumferential outer wall of the second transmission member to constitute a worm in the worm gear structure, a tooth structure meshing with the helical tooth structure is formed on the circumferential outer wall of the first transmission member to constitute a worm in the worm gear structure, the worm gear structure is a non-self-locking worm gear structure, and the second transmission member is a multi-head worm structure; the second transmission member is fixed to the inner ring of the second bearing, and the outer ring of the second bearing is fixed to the inner wall of the housing; both axial ends of the second transmission member are fixed to the inner ring of a second bearing.

4. The vehicle limiter according to claim 1 or 3, characterized in that The housing is provided with two limit protrusions for limiting the moving distance of the output planetary gear when it rotates around the sun gear. When the output sun gear rotates so that the output planetary carrier plate contacts one limit protrusion, one output planetary gear engages with the second transmission member; when the output sun gear reverses so that the output planetary carrier plate contacts the other limit protrusion, the other output planetary gear engages with the second transmission member.

5. The vehicle limiter according to claim 1, characterized in that The vehicle door fixing seat includes a first fixing seat and a second fixing seat, the first fixing seat is fixed to the vehicle door, and the second fixing seat is rotatably fixed to the first fixing seat, the first fixing seat is located between the vehicle body fixing seat and the second fixing seat, and the shell is fixed to the second fixing seat, the limiting arm is arranged horizontally, and a vertically arranged rotating shaft is arranged between the first fixing seat and the second fixing seat, and the second fixing seat can rotate around the rotating shaft; the first fixing seat and the second fixing seat both include a vertically arranged fixing plate, the fixing plate of the first fixing seat is used to be fixed to the vehicle door, and the fixing plate of the second fixing seat is fixed to the shell, and connecting plates are arranged at the upper and lower ends of the fixing plate, and the connecting plate of the first fixing seat can be rotatably fixed through the connecting plate of the rotating shaft and the second fixing seat; the rotating shaft and the connecting plate are fixed by shaft riveting; the first fixing seat and the second fixing seat are both provided with a clearance groove for making way for the limiting arm.

6. The vehicle limiter according to claim 1, characterized in that The vehicle body fixing seat includes a vehicle body fixing seat body, a vertically arranged ball head rod is provided on the vehicle body fixing seat body, a ball head is provided at the end of the ball head rod, a ball head is fixed to the end of the limiting arm, the ball head seat has a receiving groove opening upward or downward to accommodate the ball head, and an anti-slip structure is provided at the opening of the receiving groove to prevent the ball head from slipping out.

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