A construction method of a planar four-bar door lock mechanism capable of realizing manual opening and closing of automobile doors

Abstract

The present invention provides a method for constructing a planar four-bar door lock mechanism capable of realizing manual and automatic opening and closing of an automobile door. The method comprises an automobile door lock body, wherein the automobile door lock body comprises an outer opening handle rod, an inner opening handle rod, a telescopic member, a rotating rod, and a ratchet rod. A first hinge seat is defined as point A, a hinge point between the inner opening handle rod and the telescopic member is defined as point B, a hinge point between the telescopic member and the rotating rod is defined as point C, and a second hinge seat is defined as point D. A first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod are defined, a motion angle of each connecting rod is determined, and a planar four-bar mechanism parameter equation is constructed. A motion characteristic signal diagram is used to determine whether multiple working modes of the automobile door lock body can be realized by retracting and extending the structural scale of the second connecting rod. If not, the parameters of each connecting rod are adjusted until each working mode is satisfied. The present invention proceeds from the construction principle of a similar planar four-bar mechanism to perform scale planning, and can perform structural design of automobile door lock bodies for various automobile doors.

Description

Technical Field

[0001] The invention belongs to the field of automobile engineering, and in particular relates to a construction method of a planar four-bar door lock mechanism capable of realizing manual opening and closing of automobile doors. Background Art

[0002] With the rapid development of industrial technology, people are placing higher demands on the intelligence of automobiles. As the first physical barrier between people and vehicles, the development of more automated door locks is of great significance. Given the challenges of limited design space and complex operating conditions for door locks, some current automatic electric door opening methods often utilize a planar four-bar transmission mechanism to achieve multi-mode and multi-operational door lock opening and closing functions.

[0003] Existing automotive door lock bodies only explain how the relevant structures and functions are implemented, but do not address the construction principles, scale planning, and multi-mode conversion mechanisms of the planar four-bar mechanism, which is the key to achieving these functions. Therefore, when designing new automotive door lock bodies for different design needs and space requirements, the existing structure may fail and need to be redesigned. During the design process, the connecting rod dimensions are usually arbitrarily given, and then continuously revised through prototype simulation, making the entire process time-consuming and labor-intensive. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a method for constructing a planar four-bar door lock mechanism that can realize manual opening and closing of automobile doors.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A method for constructing a planar four-bar door lock mechanism capable of realizing manual opening and closing of a car door comprises the following steps:

[0007] Step S1, providing a car door lock body, the car door lock body comprising an outer opening handle rod, an inner opening handle rod, a retractable member, a rotating rod, a safety device, and a ratchet rod, all of which are arranged on the car door, a first hinge seat and a second hinge seat are provided on the car door, one end of the inner opening handle rod is fixed to the safety device, the lower middle portion is hinged to the first hinge seat, the upper middle portion is hinged to one end of the retractable member, and the other end is suspended, a first limit block and a second limit block are respectively provided on both sides of the inner opening handle rod, one end of the outer opening handle rod is suspended, the middle portion is hinged to the first hinge seat The pawl rod is hinged, and the other end is provided with a first pushing member capable of contacting the middle part of the inner opening handle rod. One end of the pawl rod is connected to a pawl, the middle part is hinged to the first hinge seat, and the other end is in contact with the safety device. The pawl is hinged to the car door, and a ratchet is rotatably connected to the car door. The ratchet is provided with a ratchet groove, and a movable stop pin is provided above the ratchet groove. The other end of the telescopic member is hinged to the rotating rod and connected by a second torsion spring. The rotating rod is hinged to the second hinge seat, and the first torsion spring is connected to the outer opening handle rod, the inner opening handle rod and the pawl rod;

[0008] When the inner opening handle rod moves from the second limit block to the first limit block, it can trigger the movable stop pin to move downward into the ratchet groove to rotate the ratchet, and the inner opening handle rod drives the safety device to rotate, and then drives the pawl rod to rotate, so that the ratchet and pawl engage, and the car door is locked;

[0009] When the inner opening handle rod moves from the first limit block to the second limit block, it drives the safety device to rotate in the opposite direction, thereby driving the pawl rod to rotate, causing the pawl to leave the ratchet wheel, and the car door is opened;

[0010] Step S2, define the first hinge seat as point A, the hinge point between one end of the inner opening handle rod and the telescopic member as point B, the hinge point between the telescopic member and the rotating rod as point C, and the second hinge seat as point D. Determine that the line connecting point A and point B, the line connecting point B and point C, the line connecting point C and point D, and the connection between point D and point A are composed of a planar four-bar mechanism and are defined as the first link, the second link, the third link, and the fourth link respectively. Define a horizontal line and determine the motion angle of each link. The lengths of the first link, the second link, the third link, and the fourth link are respectively 、 、 and ;

[0011] Step S3, construct the parametric equation of the planar four-bar mechanism between the first link, the second link, the third link and the fourth link, obtain all the motion characteristic information of the planar four-bar mechanism with the motion characteristic signal diagram, and determine the second link according to the motion characteristic signal diagram. Whether it can be scaled up or down;

[0012] Step S4: determine the multiple working modes of the car door lock body, determine the rod parameters according to the returned motion characteristic signal diagram 、 、 、 Adjustments are made until the four-bar mechanism parameters that meet the motion mode requirements are formed.

[0013] Furthermore, the retractable member includes a shell, a second slider, a first connecting rod and a second connecting rod. The second slider is arranged in the shell, and the two sides of the second slider are respectively connected to the two side walls of the shell through compression springs, so that when not subject to external force, the two compression springs keep the second slider in a force balance state. One end of the first connecting rod is fixed to the shell, and the other end is hinged to the inner opening handle rod. One end of the second connecting rod is fixed to the second slider, and the other end is hinged to the rotating rod.

[0014] Furthermore, in step S3, the parametric equation of the planar four-bar mechanism is:

[0015]

[0016]

[0017]

[0018] + =1

[0019] =1

[0020] in, For the first connecting rod The angle with the horizontal line, For the second connecting rod The angle with the horizontal line, For the third link The angle with the horizontal line, For the fourth link Angle with the horizontal line;

[0021] According to the characteristics of the car door installed by the car door lock body, the positions of the first hinge seat and the second hinge seat and the first connecting rod are obtained by trial and error. , second connecting rod and the third link The length of the fourth link is obtained Angle with the horizontal and the fourth link , use trigonometric function elimination method to eliminate ,get and The motion characteristic signal diagram, when the motion characteristic signal diagram represents and There are two loops between them, which prove the position of the first hinge seat and the second hinge seat and the first connecting rod , second connecting rod and the third link The length is reasonable.

[0022] Furthermore, according to the characteristics of the automobile door on which the automobile door lock body is installed and according to the multiple working modes of the automobile door lock body, the extreme working positions of the rotating rod and the inner opening handle rod in multiple working modes are determined, thereby obtaining the telescopic amount of the telescopic component.

[0023] Furthermore, in step S1, the car door lock body further includes a sector gear and a rotating gear, the sector gear is provided on the rotating rod, the rotating gear is engaged with the sector gear, and the rotating gear is driven to rotate by a driving member;

[0024] In step S4, multiple working modes include an electric car door opening mode. After the car door is locked, during the implementation of the electric car door opening mode: the driving member drives the rotating gear to rotate, and the fan gear engaged with the rotating gear pulls the retractable component, thereby moving the inner opening handle rod from the first limit block to the second limit block. The retractable component rotates but keeps the scale unchanged. At the same time, the inner opening handle rod is pulled away from the first limit block until it hits the second limit block. The inner opening handle rod drives the safety device to rotate, causing the pawl to leave the ratchet and the car door is opened.

[0025] Furthermore, in step S1, the automobile door lock body further comprises an incomplete gear, wherein the incomplete gear is provided with an arcuate tooth portion and an arcuate toothless portion, wherein the arcuate tooth portion is capable of meshing with the rotating gear, and the arcuate toothless portion is not meshed with the rotating gear, and the incomplete gear is fixed to the output shaft of the driving member;

[0026] In step S4, the multiple working modes include a manual limit opening mode for the automobile door. After the automobile door is locked, during the implementation of the manual limit opening mode for the automobile door: the inner opening handle rod or the outer opening handle rod is manually rotated, so that the inner opening handle rod moves away from the first limit block until it abuts the second limit block, and the inner opening handle rod drives the safety device to rotate, so that the pawl moves away from the ratchet wheel, and the automobile door is opened. During this process, since the arc-shaped tooth portion is engaged with the rotating gear, the rotating gear and the sector gear are both engaged and do not rotate, and thus the scale of the retractable member becomes smaller under the action of the thrust;

[0027] The maximum contraction amount of the first slider in the retractable member is for:

[0028] .

[0029] Furthermore, according to the characteristics of the automobile door on which the automobile door lock body is installed, the structural parameters and positions of the sector gear, rotating gear and incomplete gear are determined, and according to the multiple working modes of the automobile door lock body, the multiple working positions of the rotating rod in the multiple working modes are determined, and then the rotation angle of the sector gear when the rotating rod is converted between the multiple working positions is obtained, thereby obtaining the rotation angle of the rotating gear, the rotation angle of the incomplete gear, and the size of the arc-shaped tooth portion and the arc-shaped toothless portion on the incomplete gear.

[0030] Furthermore, in step S1, the car door lock body is further provided with a raised gear, the raised gear is provided with a protrusion, the raised gear is provided on the rotating shaft of the incomplete gear, the safety device includes a box body and a first slider provided in the box body, the first slider is connected to a push rod, the other end of the push rod is provided with a shift fork, the first slider is provided with a second pusher, and the second pusher is capable of contacting the pawl rod;

[0031] In step S4, multiple working modes include an automatic insurance mode and an automatic release mode. After the car door is locked, during the automatic insurance mode: the arc-shaped tooth portion engages with the rotating gear, the driving member drives the incomplete gear to rotate, and then drives the rotating gear and the sector gear to rotate. At this time, because the inner opening handle rod is blocked by the first limit block, the retractable member will first be compressed to pass through the singular position, and after breaking through the singular position, the length will return to its original length. During this process, the raised gear is driven to rotate by the incomplete gear, and the raised gear shifts the shift fork, causing the safety device to disengage from the pawl rod, making the opening branch invalid;

[0032] During the automatic release mode, the arc-shaped tooth portion meshes with the rotating gear, and the driving member drives the incomplete gear to rotate in the opposite direction, thereby driving the rotating gear and the sector gear to rotate in the opposite direction. At this time, because the inner opening handle rod is blocked by the first limit block, the retractable member will first be compressed to pass through the singular position, and then restore its original length after breaking through the singular position. In this process, the raised gear is driven by the incomplete gear to rotate in the opposite direction, shifting the shift fork, thereby causing the safety device to contact the pawl rod, and opening the opening branch;

[0033] During the implementation of the automatic insurance mode and the automatic release mode, it can be deduced that the maximum contraction amount of the first slider in the retractable member is for:

[0034]

[0035] The movable range of the first slider in the retractable member in the housing must be greater than .

[0036] Furthermore, in order to enable the car door lock body to realize the manual limit opening car door mode, automatic insurance mode, and automatic release insurance mode, it is necessary to judge and The size of , then the movable range of the first slider in the retractable member in the housing is greater than ;like , then the movable range of the first slider in the retractable member in the housing is greater than .

[0037] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0038] (1) The present invention provides a method for constructing a planar four-bar door lock mechanism capable of realizing manual and automatic opening and closing of automobile doors. The planar four-bar mechanism can be constructed by connecting the inner opening handle rod, the telescopic member, the rotating rod, the first hinge seat and the second hinge seat. Since the telescopic member is telescopic, a quasi-planar four-bar mechanism is formed, which meets the requirements of automobile door opening and closing. At the same time, its mechanism is simple and uses relatively few components to realize multiple working modes such as electric opening, manual opening, manual limit opening, and automatic arming and disarming of the safety.

[0039] (2) The present invention starts from the construction principle of a quasi-planar four-bar mechanism and uses a computer for dimensional planning, which can guide the structural design of automobile door locks with various working and installation space requirements. Compared with the existing dimensional trial and error method in the door lock design process, it not only saves a lot of development time and prototype production costs, but also explains the conversion process between multiple working modes of automobile door locks based on the underlying principle of the construction of a quasi-planar four-bar mechanism, forming a universal method for the construction of a quasi-planar four-bar door lock mechanism.

[0040] (3) The planar four-bar mechanism of the present invention has clear and controllable motion under the assistance of a computer, so its motion control accuracy is high in door lock applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings described herein are intended to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0042] Figure 1 The diagram shows the structure of a flat four-bar door lock mechanism that can realize manual opening and closing of automobile doors.

[0043] Figure 2 This is the dimensional coordinate diagram of the four-bar mechanism in the car door lock body.

[0044] Figure 3 This is the motion characteristic signal diagram of the four-bar mechanism under the first scale parameter.

[0045] Figure 4 This is the motion characteristic signal diagram of the four-bar mechanism under the second scale parameter.

[0046] Figure 5 This is the motion characteristic signal diagram of the four-bar mechanism under the third scale parameter.

[0047] Figure 6 This is a schematic diagram of the flat four-bar door lock mechanism for electrically opening a car door.

[0048] Figure 7 The equivalent four-bar motion state corresponds to the planar four-bar door lock mechanism of the electric opening car door.

[0049] Figure 8 Schematic diagram of the flat four-bar door lock mechanism for manually opening a car door.

[0050] Figure 9 The equivalent four-bar motion state corresponds to the planar four-bar door lock mechanism for manually opening the car door.

[0051] Figure 10 This is a schematic diagram of the flat four-bar door lock mechanism for manually limited opening of a car door.

[0052] Figure 11 The equivalent four-bar motion state corresponds to the planar four-bar door lock mechanism of the manual limit opening automobile door.

[0053] Figure 12 This is a schematic diagram of the flat four-bar door lock mechanism for an automatically secured car door.

[0054] Figure 13 The invention relates to the equivalent four-bar motion state corresponding to the plane four-bar door lock mechanism of the automatic insurance automobile door.

[0055] Figure 14 This is a schematic diagram of the flat four-bar door lock mechanism for an automatically released car door.

[0056] Figure 15 The equivalent four-bar motion state of the plane four-bar door lock mechanism of the automatically released automobile door is obtained.

[0057] Among them: 1. safety device; 2. first torsion spring; 3. external opening handle rod; 4. pawl rod; 5. ratchet; 6. shift fork; 7. incomplete gear; 8. raised gear; 9. rotating gear; 10. fan-shaped gear; 11. second torsion spring; 12. telescopic member; 13. movable stop pin; 14. internal opening handle rod; 15. first limit block; 16. second limit block; 17. box body; 18. first slider; 19. second push member; 20. first push member; 21. second slider; 22. compression spring; 23. first connecting rod; 24. second connecting rod; 25. first connecting rod; 26. second connecting rod; 27. third connecting rod; 28. fourth connecting rod. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0060] A method for constructing a planar four-bar door lock mechanism capable of realizing manual opening and closing of automobile doors, such as Figures 1-15 As shown, the following steps are included:

[0061] Step S1: Figure 1 and Figure 2 As shown, a car door lock body is provided, which includes an outer opening handle rod 3, an inner opening handle rod 14, a retractable member 12, a rotating rod, a safety device 1, and a pawl rod 4, all of which are arranged on the car door. A first hinge seat and a second hinge seat are provided on the car door at a certain distance. One end of the inner opening handle rod 14 is fixed to the safety device 1, the lower middle part is hinged to the first hinge seat, the upper middle part is hinged to one end of the retractable member 12, and the other end is suspended. A first limit block 15 and a second limit block 16 are respectively provided on both sides of the inner opening handle rod 14. One end of the outer opening handle rod 3 is suspended, and the middle part is hinged to the first hinge seat. The pawl is connected to the car door, and the other end is provided with a first pushing member 20 that can contact the middle part of the inner opening handle rod 14. One end of the pawl rod 4 is connected to the pawl, the middle part is hinged to the first hinge seat, and the other end is in contact with the safety device 1. The pawl is hinged to the car door, and a ratchet is rotatably connected to the car door. The ratchet 5 is provided with a ratchet groove, and a movable stop pin 13 is provided above the ratchet groove. The other end of the retractable member 12 is hinged to the rotating rod and connected through a second torsion spring 11. The rotating rod is hinged to the second hinge seat. A first torsion spring 2 is provided on the first hinge seat. The first torsion spring 2 is connected to the outer opening handle rod 3, the inner opening handle rod 14 and the pawl rod 4;

[0062] When the inner opening handle rod 14 moves from the second limit block 16 to the first limit block 15, it can trigger the movable stop pin 13 to move downward into the ratchet groove to rotate the ratchet 5. The inner opening handle rod 14 drives the safety device 1 to rotate, and then drives the pawl rod 4 to rotate, so that the ratchet 5 and the pawl engage, and the car door is locked;

[0063] When the inner opening handle rod 14 moves from the first limit block 15 to the second limit block 16, it drives the safety device 1 to rotate in the opposite direction, and then drives the pawl rod 4 to rotate, so that the pawl leaves the ratchet wheel 5, and the car door is opened;

[0064] Step S2, define the first hinge seat as point A, the hinge point between one end of the inner opening handle rod 14 and the telescopic member 12 as point B, the hinge point between the telescopic member 12 and the rotating rod as point C, and the second hinge seat as point D. Determine that the line connecting point A and point B, the line connecting point B and point C, the line connecting point C and point D, and the connection between point D and point A are composed of a planar four-bar mechanism and are defined as the first link 25, the second link 26, the third link 27, and the fourth link 28, respectively. Define a horizontal line and determine the motion angle of each link. The lengths of the first link 25, the second link 26, the third link 27, and the fourth link 28 are respectively 、 、 and ;

[0065] Step S3, as Figure 3-Figure 5 As shown, a parametric equation of a planar four-bar mechanism between the first link 25, the second link 26, the third link 27, and the fourth link 28 is constructed, and all motion characteristic information of the planar four-bar mechanism is obtained using a motion characteristic signal graph. It is then determined whether the second link 26 can be extended or retracted based on the motion characteristic signal graph.

[0066] Step S4: determine the multiple working modes of the car door lock body, determine the rod parameters according to the above returned motion characteristic signal diagram 、 、 、 Adjustments are made until the four-bar mechanism parameters that meet the motion mode requirements are formed.

[0067] The present invention provides a method for constructing a planar four-bar door lock mechanism that can realize manual automatic opening and closing of automobile doors. The planar four-bar mechanism is constructed by connecting the inner opening handle rod 14, the telescopic member 12, the rotating rod, the first hinge seat and the second hinge seat. Since the telescopic member 12 is telescopic, a quasi-planar four-bar mechanism is formed. The present invention proceeds from the construction principle of the quasi-planar four-bar mechanism and performs scale planning. It can design the structure of the automobile door lock body for various automobile doors, so that the automobile door lock body can meet the conversion between multiple working modes. The method for constructing a planar four-bar door lock mechanism that can realize manual automatic opening and closing of automobile doors is explained from the underlying principle of the construction of the quasi-four-bar mechanism.

[0068] like Figure 1 As shown, in one embodiment of the present invention, during the process of closing the car door, when the inner opening handle rod 14 rotates counterclockwise and moves from the second limit block 16 to the first limit block 15, it can trigger the movable stop pin 13 to move downward into the ratchet groove to cause the ratchet 5 to rotate counterclockwise, and the inner opening handle rod 14 drives the safety device 1 to rotate counterclockwise, and then drives the pawl rod 4 to rotate counterclockwise, so that the ratchet 5 and the pawl engage, and the car door is locked.

[0069] The present invention can also manually open the car door, such as Figure 8 and Figure 9 As shown, this is the manual car door opening mode of the present invention. During the manual opening of the car door, the outer opening handle rod 3 is moved so that the first pusher of the outer opening handle rod 3 contacts the inner opening handle rod 14, or the inner opening handle rod 14 is moved. When the inner opening handle rod 14 moves clockwise from the first limit block 15 to the second limit block 16, it drives the safety device 1 to rotate clockwise, and then drives the pawl rod 4 to rotate clockwise, so that the pawl leaves the ratchet 5, and the car door is opened. During this process, the retractable member 12 is subjected to thrust but the scale remains unchanged.

[0070] like Figure 9 As shown, the equivalent four-bar motion state corresponding to the planar four-bar door lock mechanism for manually opening the car door is shown. The dotted line represents the initial state, the thick solid line represents the state of electrically opening the car door, and the thin solid line represents the motion trajectory.

[0071] When the ratchet 5 and the pawl are engaged, the ratchet 5 can lock the lock catch and close the car door.

[0072] In one embodiment of the present invention, in order to ensure that the length of the telescopic member 12 remains unchanged when the telescopic member 12 is subjected to a slight external force and there is moving space on both sides of the telescopic member 12, and the length of the telescopic member 12 can change when the telescopic member 12 is subjected to a large external force and there is no moving space on one side of the telescopic member 12 but there is moving space on the other side, the telescopic member 12 includes a shell, a second slider 21, a first connecting rod 23 and a second connecting rod 24, the second slider 21 is arranged in the shell, and the two sides of the second slider 21 are respectively connected to the two side walls of the shell by compression springs 22, so that when not subjected to external force, the two compression springs 22 keep the second slider 21 in a force balance state, one end of the first connecting rod 23 is fixed to the shell, and the other end is hinged to the inner opening handle rod 14, one end of the second connecting rod 24 is fixed to the second slider 21, and the other end is hinged to the rotating rod.

[0073] When the inner opening handle rod 14 moves from the first limit block 15 to the second limit block 16, the second slider 21 maintains a balanced state; when the inner opening handle rod 14 abuts against the first limit block 15, pushing the rotating rod can push the second slider 21, so that the retractable member 12 can be converted from the original length state to the shortened state, breaking through the singular position, and then converting from the shortened state to the original length state; when the inner opening handle rod 14 abuts against the second limit block 16, pulling the rotating rod can pull the second slider 21, so that the retractable member 12 can be converted from the original length state to the extended state, breaking through the singular position, and then converting from the extended state to the original length state.

[0074] like Figure 3 As shown, the pattern interval mutation points indicate singular locations.

[0075] By providing the unique retractable component 12, the working modes of the automobile door lock body can be increased, thereby facilitating the automobile door lock body to switch between multiple working modes and facilitating the multifunctional design of the automobile door lock body.

[0076] In the present invention, in step S3, the parametric equation of the planar four-bar mechanism is:

[0077]

[0078]

[0079]

[0080] + =1

[0081] =1

[0082] in, For the first connecting rod The angle with the horizontal line, For the second connecting rod The angle with the horizontal line, For the third link The angle with the horizontal line, For the fourth link Angle with the horizontal line;

[0083] According to the characteristics of the car door installed by the car door lock body, the positions of the first hinge seat and the second hinge seat and the first connecting rod are obtained by trial and error. , second connecting rod and the third link The length of the fourth link is obtained Angle with the horizontal and the fourth link , use trigonometric function elimination method to eliminate ,get and The motion characteristic signal diagram, when the motion characteristic signal diagram represents and There are two loops between them, which prove the position of the first hinge seat and the second hinge seat and the first connecting rod , second connecting rod and the third link The length is reasonable.

[0084] like Figure 3-Figure 5 As shown, and There are many cases of motion characteristic signal graphs, including two ring loops, two curve loops and one ring loop. Only when the motion characteristic signal graph represents and When there are two annular loops, the retractable member 12 can be switched between a shortened state and an original length state, thereby satisfying the switching of the automobile door lock body between multiple working modes.

[0085] In the present invention, according to the characteristics of the automobile door on which the automobile door lock body is installed and the multiple working modes of the automobile door lock body, the extreme working positions of the rotating rod and the inner opening handle rod 14 in multiple working modes are determined, thereby obtaining the telescopic amount of the telescopic component 12.

[0086] In the present invention, in order to realize the function of electrically opening the car door, in one embodiment of the present invention, in step S1, the car door lock body also includes a sector gear 10 and a rotating gear 9. The sector gear 10 is provided on the rotating rod, and the rotating gear 9 is engaged with the sector gear 10. By driving the rotating gear 9 to rotate, the sector gear 10 can be driven to rotate, thereby realizing the rotation of the rotating rod. The rotating gear 9 can be driven to rotate by a driving member, and the driving member is a motor.

[0087] Specifically, one end of the rotating rod is hinged to the other end of the second connecting rod 24 on the telescopic member 12, the middle portion is hinged to the second hinge seat, and the other end is installed with the sector gear 10.

[0088] In step S4, the plurality of working modes include an electric car door opening mode, specifically, Figure 6 and Figure 7 FIG. 1 shows an electric car door opening mode in an embodiment of the present invention.

[0089] Initial state of electric car door opening mode: the safety device 1 is not opened, the inner opening handle rod 14 rotates counterclockwise from the second limit block 16 to the first limit block 15 and abuts against the first limit block 15, triggering the movable stop pin 13 to move downward into the ratchet groove, the ratchet 5 rotates counterclockwise, and drives the safety device 1 to rotate counterclockwise, causing the pawl rod 4 to rotate, and then the ratchet 5 and the pawl to engage, the car door causes the ratchet 5 pawl to engage, and the car door is locked;

[0090] Implementation process of electric car door opening mode: Figure 6 and Figure 7 As shown, the rotating gear 9 rotates counterclockwise, and the sector gear 10 engaged with the rotating gear 9 rotates clockwise to pull the retractable member 12, thereby causing the inner opening handle rod 14 to rotate clockwise from the first limit block 15 to move to the second limit block 16. At this time, the two compression springs 22 on both sides of the first slider 18 in the retractable member 12 are in a compressed state. The pulling force generated by the above-mentioned sector gear 10 is less than the pressing force, and the retractable member 12 maintains its scale and moves unchanged. At the same time, the inner opening handle rod 14 rotates clockwise and is pulled away from the first limit block 15 until it presses against the second limit block 16. The inner opening handle rod 14 drives the safety device 1 to rotate clockwise, causing the pawl to leave the ratchet 5, and the car door is opened.

[0091] like Figure 7 As shown, the equivalent four-bar motion state corresponding to the planar four-bar door lock mechanism of the electric opening car door is shown. The dotted line represents the initial state, the thick solid line represents the electric opening car door state, and the thin solid line represents the motion trajectory.

[0092] In the present invention, in order to realize the manual limit opening mode of the car door, in step S1, the car door lock body also includes an incomplete gear 7, which is provided with an arc-shaped tooth portion and an arc-shaped toothless portion. The arc-shaped tooth portion can engage with the rotating gear 9. The output shaft of the motor is fixed to the rotating shaft of the incomplete gear 7. When the arc-shaped tooth portion engages with the rotating gear 9, the incomplete gear 7 is driven by the motor to rotate, and then the rotating gear 9 and the sector gear 10 are driven to rotate. When the arc-shaped tooth portion engages with the rotating gear 9, if there is no external force driving, the arc-shaped tooth portion and the rotating gear 9 remain in a meshing state.

[0093] In step S4, the multiple working modes include a manual limit opening mode for the car door, specifically, Figure 10 and Figure 11 As shown, this is a manual limit opening mode of a car door in one embodiment of the present invention.

[0094] Initial state of manual limit opening mode of automobile door: the safety device 1 is not opened, the inner opening handle rod 14 moves from the second limit block 16 to the first limit block 15 and abuts against the first limit block 15, triggering the movable stop pin 13 to move downward into the ratchet groove, the ratchet 5 rotates counterclockwise, and drives the box body 17 of the safety device 1 to rotate counterclockwise, causing the pawl rod 4 to rotate, and then the ratchet 5 and the pawl to engage, the automobile door causes the ratchet 5 pawl to engage, and the automobile door is locked;

[0095] Manual limit opening car door mode implementation process: Figure 10 and Figure 11 As shown, the inner opening handle rod or the outer opening handle rod 3 is manually rotated, causing the inner opening handle rod 14 to rotate clockwise to leave the first limit block 15 until it presses against the second limit block 16. The inner opening handle rod 14 drives the safety device 1 to rotate clockwise, causing the pawl to leave the ratchet 5, and the car door is opened. In this process, since the arc-shaped tooth portion is engaged with the rotating gear 9, the rotating gear 9 and the sector gear 10 are both engaged and do not rotate, so the scale of the retractable member 12 becomes smaller under the action of the thrust.

[0096] like Figure 11 As shown, the equivalent four-bar motion state corresponding to the planar four-bar door lock mechanism of the manual limit opening car door is shown. The dotted line represents the initial state, the thick solid line represents the manual limit opening car door state, and the thin solid line represents the motion trajectory.

[0097] During the manual limit opening mode of the car door, it can be deduced that the maximum contraction amount of the first slider 18 in the retractable member 12 is for:

[0098]

[0099] Therefore, it is necessary to satisfy the requirement that the movable range of the first slider 18 in the retractable member 12 in the housing is greater than .

[0100] In the present invention, the structural parameters and positions of the sector gear 10, the rotating gear 9 and the incomplete gear 7 are determined according to the characteristics of the automobile door on which the automobile door lock body is installed. According to the multiple working modes of the automobile door lock body, the multiple working positions of the rotating rod in the multiple working modes are determined, and then the rotation angle of the sector gear 10 when the rotating rod is converted between the multiple working positions is obtained, thereby obtaining the rotation angle of the rotating gear 9, the rotation angle of the incomplete gear 7, and the size of the arcuate tooth portion and the arcuate toothless portion on the incomplete gear 7.

[0101] In order to prevent the car door from being opened by opening the inner opening handle rod 14 and the outer opening handle rod 3 when the car door is closed, in step S1, the car door lock body is also provided with a raised gear 8, and the raised gear 8 is provided with a raised protrusion, and the raised gear 8 is provided on the rotating shaft of the incomplete gear 7. The safety device 1 includes a box body 17 and a first slider 18 provided in the box body 17, and the first slider 18 is connected to the push rod, and the other end of the push rod is provided with a shift fork 6. The first slider 18 is provided with a second pusher 19, and the second pusher 19 can contact the pawl rod 4. By rotating the raised gear 8, the protrusion can contact the shift fork 6, and then drive the push rod to rotate. The pushing and rotation will drive the box body 17 to rotate and the first slider 18 to move. When the second pusher 19 disengages from the pawl rod 4, the safety is locked and the car door cannot be opened.

[0102] In the present invention, the structural parameters of the raised gear 8 and the position of the raised gear 8 are determined according to the characteristics of the automobile door to which the automobile door lock body is installed and multiple working modes, thereby determining the position of the shift fork 6.

[0103] In the present invention, the movable distance of the first slider 18 and the rotation angle of the box body 17 in the safety device 1 are determined according to the characteristics of the automobile door on which the automobile door lock body is installed and multiple working modes.

[0104] like Figure 12 and Figure 13 Shown is the automatic insurance mode of the present invention.

[0105] Initial state of automatic safety mode: the safety device 1 is not opened, the inner opening handle rod 14 moves from the second limit block 16 to the first limit block 15 and abuts against the first limit block 15, triggering the movable stop pin 13 to move downward into the ratchet groove, the ratchet 5 rotates counterclockwise, and drives the box body 17 of the safety device 1 to rotate counterclockwise, causing the pawl rod 4 to rotate, and then the ratchet 5 and the pawl to engage, the car door causes the ratchet 5 pawl to engage, and the car door is locked;

[0106] Automatic insurance mode implementation process: Figure 12 and Figure 13 As shown, the arcuate teeth mesh with the rotating gear, and the driver drives the incomplete gear 7 counterclockwise, which in turn drives the rotating gear 9 and the sector gear 10. At this point, because the inner opening handle is blocked by the first stopper 15, the telescopic member 12 is initially compressed to pass through the singular position, and then returns to its original length after breaking through the mode interval. During this process, the raised gear 8, driven by the incomplete gear 7, also rotates counterclockwise, shifting the shift fork 6, thereby disengaging the safety device 1 from the pawl rod 4 and disabling the opening branch.

[0107] like Figure 13 As shown, the equivalent four-bar motion state corresponding to the planar four-bar door lock mechanism of the automatic safety car door is shown. The dotted line represents the initial state, the thick solid line represents the dynamic safety state, and the thin solid line represents the motion trajectory.

[0108] like Figure 14 and Figure 15 As shown, this is the automatic insurance release mode of the present invention.

[0109] Initial state of automatic release mode: safety device 1 is open, ratchet 5 and pawl are engaged, and the car door is locked;

[0110] Automatic release mode implementation process: This process is the reverse action of the insurance, such as Figure 14 and Figure 15 As shown, the driver drives the incomplete gear 7 to rotate clockwise, which in turn drives the rotating gear 9 and the sector gear 10. The telescopic member 12 is first compressed to pass through the singular position. After breaking through the mode interval, the telescopic member 12 returns to its original length. The inner opening handle rod 14 moves from the first limit block 15 to the second limit block 16 and abuts against the second limit block 16. During this process, the raised gear 8 is also driven by the incomplete gear 7 to rotate clockwise, shifting the shift fork 6, thereby causing the safety device 1 to contact the pawl rod 4. This in turn drives the pawl rod 4 to rotate clockwise, causing the pawl to separate from the ratchet wheel 5 and open the opening branch.

[0111] like Figure 15 As shown, the equivalent four-bar motion state corresponding to the planar four-bar door lock mechanism of the automatically released safety car door is shown. The dotted line represents the initial state, the thick solid line represents the safety state, and the thin solid line represents the motion trajectory.

[0112] During the automatic insurance mode and the automatic release mode, it can be deduced that the maximum contraction amount of the first slider 18 in the retractable member 12 is for:

[0113]

[0114] Therefore, it is necessary to satisfy the requirement that the movable range of the first slider 18 in the retractable member 12 in the housing is greater than ;

[0115] In order to enable the automobile door lock body provided by the present invention to realize the manual limit opening automobile door mode, the automatic insurance mode, and the automatic insurance release mode, it is judged that and The size of , then the movable range of the first slider 18 in the retractable member 12 in the housing is greater than ;like , then the movable range of the first slider 18 in the retractable member 12 in the housing is greater than .

[0116] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for constructing a planar four-bar door lock mechanism capable of realizing manual opening and closing of automobile doors, characterized in that: The following steps are involved: Step S1, providing a car door lock body, the car door lock body comprising an outer opening handle rod, an inner opening handle rod, a retractable member, a rotating rod, a safety device, and a ratchet rod, all of which are arranged on the car door, a first hinge seat and a second hinge seat are provided on the car door, one end of the inner opening handle rod is fixed to the safety device, the lower middle portion is hinged to the first hinge seat, the upper middle portion is hinged to one end of the retractable member, and the other end is suspended, a first limit block and a second limit block are respectively provided on both sides of the inner opening handle rod, one end of the outer opening handle rod is suspended, the middle portion is hinged to the first hinge seat The pawl rod is hinged, and the other end is provided with a first pushing member capable of contacting the middle part of the inner opening handle rod. One end of the pawl rod is connected to a pawl, the middle part is hinged to the first hinge seat, and the other end is in contact with the safety device. The pawl is hinged to the car door, and a ratchet is rotatably connected to the car door. The ratchet is provided with a ratchet groove, and a movable stop pin is provided above the ratchet groove. The other end of the telescopic member is hinged to the rotating rod and connected by a second torsion spring. The rotating rod is hinged to the second hinge seat, and the first torsion spring is connected to the outer opening handle rod, the inner opening handle rod and the pawl rod; When the inner opening handle rod moves from the second limit block to the first limit block, it can trigger the movable stop pin to move downward into the ratchet groove to rotate the ratchet, and the inner opening handle rod drives the safety device to rotate, and then drives the pawl rod to rotate, so that the ratchet and pawl engage, and the car door is locked; When the inner opening handle rod moves from the first limit block to the second limit block, it drives the safety device to rotate in the opposite direction, and then drives the pawl rod to rotate, so that the pawl leaves the ratchet wheel and the car door is opened; Step S2, define the first hinge seat as point A, the hinge point between one end of the inner opening handle rod and the telescopic member as point B, the hinge point between the telescopic member and the rotating rod as point C, and the second hinge seat as point D. Determine that the line connecting point A and point B, the line connecting point B and point C, the line connecting point C and point D, and the connection between point D and point A are composed of a planar four-bar mechanism and are defined as the first link, the second link, the third link, and the fourth link respectively. Define a horizontal line and determine the motion angle of each link. The lengths of the first link, the second link, the third link, and the fourth link are respectively 、 、 and ; Step S3, construct the parametric equation of the planar four-bar mechanism between the first link, the second link, the third link and the fourth link, obtain all the motion characteristic information of the planar four-bar mechanism with the motion characteristic signal diagram, and determine the second link according to the motion characteristic signal diagram. Whether it can achieve telescopic extension; the parametric equation of the planar four-bar mechanism is: + =1 =1 in, For the first connecting rod The angle with the horizontal line, For the second connecting rod The angle with the horizontal line, For the third link The angle with the horizontal line, For the fourth link Angle with the horizontal line; According to the characteristics of the car door installed by the car door lock body, the positions of the first hinge seat and the second hinge seat and the first connecting rod are obtained by trial and error. , second connecting rod and the third link The length of the fourth link is obtained Angle with the horizontal and the fourth link , use trigonometric function elimination method to eliminate ,get and The motion characteristic signal diagram, when the motion characteristic signal diagram represents and There are two loops between them, which prove the position of the first hinge seat and the second hinge seat and the first connecting rod. , second connecting rod and the third link The length is reasonable; Step S4: determine the multiple working modes of the car door lock body, determine the rod parameters according to the returned motion characteristic signal diagram 、 、 、 Adjustments are made until the four-bar mechanism parameters that meet the motion mode requirements are formed.

2. The method for constructing a planar four-bar door lock mechanism capable of realizing manual opening and closing of a car door according to claim 1, characterized in that: The retractable component includes a shell, a second slider, a first connecting rod and a second connecting rod. The second slider is arranged in the shell. The two sides of the second slider are respectively connected to the two side walls of the shell by compression springs, so that when not subject to external force, the two compression springs keep the second slider in a force balance state. One end of the first connecting rod is fixed to the shell, and the other end is hinged to the inner opening handle rod. One end of the second connecting rod is fixed to the second slider, and the other end is hinged to the rotating rod.

3. The method for constructing a planar four-bar door lock mechanism capable of realizing manual opening and closing of a car door according to claim 1, characterized in that: According to the characteristics of the automobile door on which the automobile door lock body is installed and the multiple working modes of the automobile door lock body, the extreme working positions of the rotating rod and the inner opening handle rod in the multiple working modes are determined, thereby obtaining the telescopic amount of the telescopic component.

4. The method for constructing a planar four-bar door lock mechanism capable of realizing manual opening and closing of a car door according to claim 3, characterized in that: In step S1, the car door lock body further includes a sector gear and a rotating gear, the sector gear is provided on the rotating rod, the rotating gear is engaged with the sector gear, and the rotating gear is driven to rotate by a driving member; In step S4, multiple working modes include an electric car door opening mode. After the car door is locked, during the implementation of the electric car door opening mode: the driving member drives the rotating gear to rotate, and the fan gear engaged with the rotating gear pulls the retractable component, thereby moving the inner opening handle rod from the first limit block to the second limit block. The retractable component rotates but keeps the scale unchanged. At the same time, the inner opening handle rod is pulled away from the first limit block until it hits the second limit block. The inner opening handle rod drives the safety device to rotate, causing the pawl to leave the ratchet and the car door is opened.

5. The method for constructing a planar four-bar door lock mechanism capable of realizing manual opening and closing of a car door according to claim 4, characterized in that: In step S1, the automobile door lock body further includes an incomplete gear, the incomplete gear being provided with an arcuate tooth portion and an arcuate toothless portion, the arcuate tooth portion being capable of meshing with the rotating gear, the arcuate toothless portion not being meshed with the rotating gear, and the incomplete gear being fixed to the output shaft of the driving member; In step S4, the multiple working modes include a manual limit opening mode for the automobile door. After the automobile door is locked, during the implementation of the manual limit opening mode for the automobile door: the inner opening handle rod or the outer opening handle rod is manually rotated, so that the inner opening handle rod moves away from the first limit block until it abuts the second limit block, and the inner opening handle rod drives the safety device to rotate, so that the pawl moves away from the ratchet wheel, and the automobile door is opened. During this process, since the arc-shaped tooth portion is engaged with the rotating gear, the rotating gear and the sector gear are both engaged and do not rotate, and thus the scale of the retractable member becomes smaller under the action of the thrust; The maximum contraction amount of the first slider in the retractable member is for: 。 6. The method for constructing a planar four-bar door lock mechanism capable of realizing manual opening and closing of a car door according to claim 5, characterized in that: According to the characteristics of the automobile door on which the automobile door lock body is installed, the structural parameters and positions of the sector gear, rotating gear and incomplete gear are determined. According to the multiple working modes of the automobile door lock body, the multiple working positions of the rotating rod in the multiple working modes are determined, and then the rotation angle of the sector gear when the rotating rod is converted between the multiple working positions is obtained, thereby obtaining the rotation angle of the rotating gear, the rotation angle of the incomplete gear, and the size of the arc tooth portion and the arc toothless portion on the incomplete gear.

7. The method for constructing a planar four-bar door lock mechanism capable of realizing manual opening and closing of a car door according to claim 5, characterized in that: In step S1, the car door lock body is further provided with a raised gear, which is provided with a protrusion, and the raised gear is provided on the rotating shaft of the incomplete gear. The safety device includes a box body and a first slider provided in the box body, the first slider is connected to a push rod, and the other end of the push rod is provided with a shift fork, and the first slider is provided with a second pusher, and the second pusher is capable of contacting the pawl rod; In step S4, multiple working modes include an automatic insurance mode and an automatic release mode. After the car door is locked, during the automatic insurance mode: the arc-shaped tooth portion engages with the rotating gear, the driving member drives the incomplete gear to rotate, and then drives the rotating gear and the sector gear to rotate. At this time, because the inner opening handle rod is blocked by the first limit block, the retractable member will first be compressed to pass through the singular position, and after breaking through the singular position, the length will return to its original length. During this process, the raised gear is driven to rotate by the incomplete gear, and the raised gear shifts the shift fork, causing the safety device to disengage from the pawl rod, making the opening branch invalid; During the automatic release mode, the arc-shaped tooth portion meshes with the rotating gear, and the driving member drives the incomplete gear to rotate in the opposite direction, thereby driving the rotating gear and the sector gear to rotate in the opposite direction. At this time, because the inner opening handle rod is blocked by the first limit block, the retractable member will first be compressed to pass through the singular position, and then restore its original length after breaking through the singular position. In this process, the raised gear is driven by the incomplete gear to rotate in the opposite direction, shifting the shift fork, thereby causing the safety device to contact the pawl rod, and opening the opening branch; During the implementation of the automatic insurance mode and the automatic release mode, it can be deduced that the maximum contraction amount of the first slider in the retractable member is for: The movable range of the first slider in the retractable member in the housing must be greater than .

8. The method for constructing a planar four-bar door lock mechanism capable of realizing manual opening and closing of a car door according to claim 7, characterized in that: To make the car door lock body able to realize manual limit opening car door mode, automatic insurance mode, automatic release insurance mode, judge and The size of , then the movable range of the first slider in the retractable member in the housing is greater than ;like , then the movable range of the first slider in the retractable member in the housing is greater than .

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