Suction mechanism of automobile door lock

Abstract

The utility model discloses a suction mechanism of an automobile door lock, which relates to the field of opening and closing parts of the automobile door lock and comprises a motor, a first-stage worm, a first-stage transmission tooth part, a second-stage worm, a second-stage transmission tooth part, a connecting rod, a ratchet wheel and a pawl, the first-stage worm is in transmission connection with the motor, the first-stage transmission tooth part is meshed with the first-stage worm, and the second-stage transmission tooth part is meshed with the second-stage worm. The second-stage worm is fixedly connected to the axis of the first-stage transmission gear piece, the second-stage transmission gear piece is rotatably installed on a fixed shaft and meshed with the second-stage worm, a plug pin is arranged at the position, close to the rim, of the second-stage transmission gear piece, one end of the connecting rod is connected to the plug pin, and the other end of the connecting rod is connected with the ratchet wheel in a clutch mode. When the motor rotates forwards or reversely by an angular displacement, the connecting rod pushes or pulls the ratchet wheel to rotate, and the ratchet wheel is converted from a semi-locking position to a full-locking position. The door lock is small in number of parts, small and exquisite in structure, easy to platformize, easy to install and assemble along with a lock body, capable of providing enough suction force through the two stages of worm gears and worms, stable in transmission and low in noise.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile door lock opening and closing parts, in particular to an automobile door lock suction mechanism with fewer parts and greater suction force, which can make the automobile door lock structure compact. Background Art

[0002] The existing automobile suction door lock mechanism is generally divided into two categories. One is a split actuator, which realizes the suction function of the door lock by pulling a wire, and the other is integrated inside the door lock through a gear set (including planetary gears) to drive the ratchet to realize the suction function. Among them, the first category: there are many assembly processes, high parts cost, and complex installation on the whole vehicle. Since the split actuator has many parts, it is necessary to consider the installation on the car body at the same time, and it is also necessary to connect it with the door lock through a pull wire. The length of the pull wire of different car doors is different, resulting in a wide variety of products, which also makes it difficult to platformize; the second category: the door lock is large in size, occupies the space of the car body, and the suction force generated is small, and the car door cannot be closed in harsh conditions. Since this type of door lock has actuators such as electric opening and central control, and the gear set is integrated to realize the suction function, the door lock is large in size. If a small planetary gear is used, the transmission ratio is relatively small, resulting in insufficient suction force and a lot of noise. In view of this, the utility model provides a suction mechanism for a car door lock which has fewer parts and a greater suction force and can make the car door lock structure compact. Utility Model Content

[0003] In order to solve the defects of the above-mentioned technology, the utility model provides a suction mechanism of a car door lock which has fewer parts and a greater suction force and can make the car door lock structure compact.

[0004] The technical solution adopted by the utility model to achieve the above technical effects is:

[0005] A suction mechanism for a car door lock comprises a motor, a first-stage worm, a first-stage transmission tooth, a second-stage worm, a second-stage transmission tooth, a connecting rod, a ratchet and a pawl, wherein the first-stage worm is connected to the motor in a transmission manner, the first-stage transmission tooth meshes with the first-stage worm, the second-stage worm is fixedly connected to the axis of the first-stage transmission tooth, the second-stage transmission tooth is rotatably mounted on a fixed shaft and meshes with the second-stage worm, the second-stage transmission tooth is provided with a latch at a position close to a wheel rim, one end of the connecting rod is connected to the latch, and the other end is clutchably connected to the ratchet, when the motor rotates forward or reverses an angular displacement, the connecting rod pushes or pulls the ratchet to rotate, the ratchet changes from a semi-locked position to a fully locked position, and meshes with the pawl to complete the suction action of the door lock.

[0006] Preferably, in the above-mentioned automobile door lock suction mechanism, a ratchet damping shaft is provided at the rotation axis center of the ratchet, and a ratchet half-locking end and a ratchet full-locking end are formed at one end of the ratchet that cooperates with the pawl, and a ratchet damping shaft is provided at the rotation axis center of the pawl, and the tooth end of the pawl is provided with an arc-shaped guide surface that cooperates with the ratchet half-locking end and the ratchet full-locking end.

[0007] Preferably, in the above-mentioned suction mechanism of the automobile door lock, a rotating member is provided on the second-stage worm gear so as to make it serve as the rotating axis of the first-stage transmission gear member.

[0008] Preferably, in the above-mentioned suction mechanism of the automobile door lock, there are two rotating members, which are rotatably sleeved on the two ends of the rod body of the second-stage worm, one in front and one in the back.

[0009] Preferably, in the above-mentioned suction mechanism of the automobile door lock, the rotating part is a bearing or a sleeve.

[0010] Preferably, in the above-mentioned suction mechanism of the automobile door lock, the first-stage transmission toothed member is a worm gear, and the second-stage transmission toothed member is a worm gear.

[0011] Preferably, in the above-mentioned suction mechanism of the automobile door lock, the front end of the connecting rod is formed with a pushing end, the ratchet is provided with a positive hook cooperating with the pushing end, the pushing end includes a flat step portion located on the inner side and an arc-shaped protrusion located on the outer side, and the flat step portion abuts against the positive hook when the motor rotates forward by an angular displacement.

[0012] Preferably, in the above-mentioned suction mechanism of the automobile door lock, a pull hook is formed on the front end of the connecting rod, and the ratchet is provided with a reverse hook that cooperates with the pull hook.

[0013] The advantages and positive effects of the utility model are as follows: the suction mechanism of the automobile door lock of the utility model has fewer parts, the door lock is easy to be platformized, installed with the lock body, and easy to assemble. Through the two-stage worm gear, a large transmission ratio can be generated, thereby providing sufficient suction force, and the transmission is stable and low in noise. In addition, the vertical distribution structure of the two-stage worm gear can make full use of the L-shaped space of the door lock, making the door lock structure compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional diagram of a push-type suction mechanism according to an embodiment of the utility model;

[0015] Figure 2 This is a diagram of a semi-locked state of a push-type suction mechanism according to an embodiment of the utility model;

[0016] Figure 3 This is a diagram of the fully locked state of the push-type suction mechanism of an embodiment of the utility model;

[0017] Figure 4 A three-dimensional diagram of a pull-type suction mechanism according to an embodiment of the utility model;

[0018] Figure 5 This is a back structural diagram of a pull-type suction mechanism according to an embodiment of the utility model;

[0019] Figure 6 This is a diagram of a semi-locked state of a pull-type suction mechanism according to an embodiment of the utility model;

[0020] Figure 7 This is a diagram of the fully locked state of the pull-type suction mechanism according to one embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to further understand the present invention, the present invention is further described below with reference to the accompanying drawings and specific embodiments:

[0022] In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 a limitation on the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In order to further understand the content, features and effects of the present invention, the following embodiments are described in detail as follows:

[0025] Embodiment 1:

[0026] See also Figure 1 As shown in the figure, the embodiment of the utility model proposes a suction mechanism for a car door lock, which includes a motor 1, a first-stage worm 2, a first-stage transmission gear 3, a second-stage worm 4, a second-stage transmission gear 5, a connecting rod 6, a ratchet 7 and a pawl 8. Figure 1As shown, the first-stage worm 2 is connected to the motor 1, and the motor 1 drives the first-stage worm 2 to rotate, and the first-stage transmission gear 3 is meshed with the first-stage worm 2, and the first-stage transmission gear 3 meshed with the first-stage worm 2 is driven to rotate by the rotating first-stage worm 2. Figure 1 As shown, the second-stage worm 4 is fixedly connected to the axis of the first-stage transmission gear 3. As the rotation axis of the first-stage transmission gear 3, the second-stage worm 4 rotates with the rotation of the first-stage transmission gear 3. Specifically, the second-stage transmission gear 5 is rotatably mounted on a fixed shaft 51 and meshes with the second-stage worm 4. The second-stage transmission gear 5 is driven to rotate by the rotating second-stage worm 4. Among them, the second-stage transmission gear 5 is provided with a latch 52 at a position close to the wheel rim, and one end of the connecting rod 6 is connected to the latch 52, and the other end is connected to the ratchet 7 in a clutchable manner. Specifically, in the first embodiment of the present utility model, the connecting drive structure between the connecting rod 6 and the ratchet 7 is a push-type structure. When the motor 1 rotates forward by an angular displacement, the connecting rod 6 pushes the ratchet 7 to rotate, and the ratchet 7 changes from a semi-locked position to a fully locked position, meshing with the pawl 8, completing the suction action of the door lock. In the first embodiment, the closing mechanism of the automobile door lock transmits the power of the motor 1 to the connecting rod 6 through the meshing of the two-stage worm gear and the transmission gear. When the motor 1 rotates forward, it provides thrust for the connecting rod 6, and the thrust of the connecting rod 6 drives the ratchet 7 to rotate, thereby pushing the ratchet 7 from the semi-locked position to the fully locked position, completing the closing action of the door lock.

[0027] Further, in a preferred embodiment of the present invention, Figure 1 As shown, a ratchet damping shaft 71 is provided at the rotation axis of the ratchet 7, and the ratchet damping shaft 71 can enable the ratchet 7 to maintain a reset capability. In the fully locked position, when the motor 1 reverses an angular displacement, the connecting rod 6 retreats, and the ratchet 7 is reset to the initial semi-locked state under the action of the ratchet damping shaft 71. Figure 1 As shown, the ratchet 7 is formed with a ratchet semi-locking end 72 and a ratchet fully-locking end 73 at one end that cooperates with the ratchet 8. A ratchet damping shaft 81 is provided at the rotation axis of the ratchet 8. The ratchet damping shaft 81 can enable the ratchet 8 to maintain a reset capability. In the fully locked position, when the motor 1 reverses an angular displacement, the connecting rod 6 retreats, and the ratchet 7 is reset to the initial semi-locked state under the action of the ratchet damping shaft 71. At this time, the ratchet 8 is not constrained by the ratchet 7 and is reset to the initial semi-locked state under the action of the ratchet damping shaft 81. Specifically, as Figure 1 As shown, the tooth end of the pawl 8 is provided with an arc-shaped introduction surface 82 that cooperates with the pawl half-locking end 72 and the pawl full-locking end 73. Figure 2 As shown, the ratchet 7 is in the semi-locked position. At this time, the arc-shaped lead-in curved surface 82 of the pawl 8 abuts against the semi-locked end 72 of the pawl, forming a semi-locked state. Figure 3As shown, the ratchet 7 is working in the fully locked position. When the connecting rod 6 is pushed forward and further extended, the connecting rod 6 pushes the ratchet 7 to continue to rotate counterclockwise by an angle, and the ratchet 7 pushes the pawl 8 to swing until the arc-shaped lead-in curved surface 82 abuts against the fully locked end 73 of the pawl. At this time, the fully locked state is formed. During the rotation of the ratchet 7, the arc-shaped lead-in curved surface 82 slides and contacts with the end surface of the ratchet 7 between the semi-locked end 72 of the pawl and the fully locked end 73 of the pawl, until the arc-shaped lead-in curved surface 82 abuts against the fully locked end 73 of the pawl, thereby realizing the conversion of the ratchet 7 and the pawl 8 between the semi-locked state and the fully locked state.

[0028] Further, in a preferred embodiment of the present invention, Figure 1 As shown, the second-stage worm 4 is provided with a rotating member 41 that serves as the rotating shaft of the first-stage transmission gear member 3. There are two rotating members 41, which are respectively rotatably sleeved on both ends of the rod body of the second-stage worm 4, one in front and one in the back. As a preferred embodiment of the utility model, the rotating member 41 is a bearing or a sleeve, and the rotating member 41 can reduce the friction of the second-stage worm 4 during the rotation process.

[0029] Specifically, in the first embodiment of the present invention, the push-type connection drive structure between the connecting rod 6 and the ratchet wheel 7 is as follows: Figure 1 As shown, the front end of the connecting rod 6 is formed with a pushing end 61a, and the ratchet 7 is provided with a positive hook 74a cooperating with the pushing end 61a. The pushing end 61a includes a flat step portion 61a1 located on the inner side and an arc-shaped protrusion 61a2 located on the outer side. The flat step portion 61a1 abuts against the positive hook 74a when the motor 1 rotates forward by an angular displacement. The arc-shaped protrusion 61a2 can, on the one hand, play a guiding role during the abutment, and on the other hand, can avoid the two from being separated when abutting.

[0030] like Figure 2 As shown, it is a semi-locked state diagram of the push-type suction mechanism. At this time, the connecting rod 6 and the ratchet 7 are in a non-contact state, the ratchet 7 and the pawl 8 are both maintained in the initial state, and the ratchet 7 and the pawl 8 are maintained in a semi-locked state. Figure 3 The fully locked state diagram of the push-type suction mechanism is shown in FIG. 1 . As the motor 1 rotates forward, the connecting rod 6 is pushed forward, and the pushing end 61a of the connecting rod 6 is kept in contact with the positive hook 74a of the ratchet 7. The ratchet 7 continues to rotate counterclockwise by an angular displacement through the push of the connecting rod 6. During the rotation of the ratchet 7, the pawl 8 is pressed to rotate clockwise by an angle, and the arc-shaped lead-in curved surface 82 is in sliding contact with the end surface of the ratchet 7 between the half-locked end 72 of the pawl and the fully locked end 73 of the pawl, until the arc-shaped lead-in curved surface 82 is in contact with the fully locked end 73 of the pawl, thereby completing the operation of the ratchet 7. Figure 2 Half lock shown Figure 3 As an optional embodiment, the first-stage transmission gear member 3 is a worm gear, and the second-stage transmission gear member 5 is a worm gear.

[0031] Embodiment 2:

[0032] See also Figure 4 and Figure 5 As shown in the figure, the embodiment of the utility model proposes a suction mechanism for a car door lock, which includes a motor 1, a first-stage worm 2, a first-stage transmission gear 3, a second-stage worm 4, a second-stage transmission gear 5, a connecting rod 6, a ratchet 7 and a pawl 8. Figure 4 As shown, the first-stage worm 2 is connected to the motor 1, and the motor 1 drives the first-stage worm 2 to rotate, and the first-stage transmission gear 3 is meshed with the first-stage worm 2, and the first-stage transmission gear 3 meshed with the first-stage worm 2 is driven to rotate by the rotating first-stage worm 2. Figure 4 As shown, the second-stage worm 4 is fixedly connected to the axis of the first-stage transmission tooth member 3. As the rotation axis of the first-stage transmission tooth member 3, the second-stage worm 4 rotates with the rotation of the first-stage transmission tooth member 3. Specifically, the second-stage transmission tooth member 5 is rotatably mounted on a fixed shaft 51 and meshes with the second-stage worm 4. The second-stage transmission tooth member 5 is driven to rotate by the rotating second-stage worm 4. Among them, the second-stage transmission tooth member 5 is provided with a latch 52 at a position close to the wheel rim, and one end of the connecting rod 6 is connected to the latch 52, and the other end is clutchably connected to the ratchet 7. Specifically, in the second embodiment of the present utility model, the connection drive structure between the connecting rod 6 and the ratchet 7 is a pulling type structure. When the motor 1 reverses an angular displacement, the connecting rod 6 is retracted, pulling the ratchet 7 to rotate, and the ratchet 7 is retracted. Figure 6 The half-locked position shown changes to Figure 7 The fully locked position shown in the figure completes the door lock's suction action. In the second embodiment, the suction mechanism of the automobile door lock transmits the power of the motor 1 to the connecting rod 6 through the meshing of the two-stage worm and the transmission gear. When the motor 1 reverses, it provides a pulling force for the connecting rod 6, and the ratchet wheel 7 is pulled to rotate by the pulling force of the connecting rod 6, thereby pulling the ratchet wheel 7 from the semi-locked position to the fully locked position to complete the door lock's suction action. As an optional embodiment, the first-stage transmission gear 3 is a worm wheel, and the second-stage transmission gear 5 is a worm wheel.

[0033] Further, in a preferred embodiment of the present invention, Figure 4 As shown, a ratchet damping shaft 71 is provided at the rotation axis of the ratchet 7, and the ratchet damping shaft 71 can enable the ratchet 7 to maintain a reset capability. In the fully locked position, when the motor 1 rotates forward by an angular displacement, the connecting rod 6 returns to the initial position, and the ratchet 7 is reset to the initial semi-locked state under the action of the ratchet damping shaft 71. Figure 4As shown, the ratchet 7 is formed with a ratchet semi-locking end 72 and a ratchet fully-locking end 73 at one end that cooperates with the ratchet 8. A ratchet damping shaft 81 is provided at the rotation axis of the ratchet 8. The ratchet damping shaft 81 can enable the ratchet 8 to maintain a reset capability. In the fully locked position, when the motor 1 rotates forward by an angular displacement, the connecting rod 6 returns to the initial position, and the ratchet 7 is reset to the initial semi-locked state under the action of the ratchet damping shaft 71. At this time, the ratchet 8 is not constrained by the ratchet 7 and is reset to the initial semi-locked state under the action of the ratchet damping shaft 81. Specifically, as Figure 5 As shown, the tooth end of the pawl 8 is provided with an arc-shaped introduction surface 82 that cooperates with the pawl half-locking end 72 and the pawl full-locking end 73. Figure 6 As shown, the ratchet 7 is in the semi-locked position. At this time, the arc-shaped lead-in curved surface 82 of the pawl 8 abuts against the semi-locked end 72 of the pawl, forming a semi-locked state. When the connecting rod 6 is pulled back further, the connecting rod 6 pulls the ratchet 7 to continue to rotate counterclockwise by an angle, and the ratchet 7 pushes the pawl 8 to swing until the arc-shaped lead-in curved surface 82 abuts against the fully locked end 73 of the pawl, forming a semi-locked state. Figure 7 During the rotation of the ratchet 7, the arcuate lead-in curved surface 82 makes sliding contact with the end surface of the ratchet 7 between the pawl semi-locked end 72 and the pawl fully locked end 73 until the arcuate lead-in curved surface 82 abuts against the pawl fully locked end 73, thereby realizing the conversion of the ratchet 7 and the pawl 8 between the semi-locked state and the fully locked state.

[0034] Further, in a preferred embodiment of the present invention, Figure 4 As shown, the second-stage worm 4 is provided with a rotating member 41 that serves as the rotating shaft of the first-stage transmission gear member 3. There are two rotating members 41, which are respectively rotatably sleeved on both ends of the rod body of the second-stage worm 4, one in front and one in the back. As a preferred embodiment of the utility model, the rotating member 41 is a bearing or a sleeve, and the rotating member 41 can reduce the friction of the second-stage worm 4 during the rotation process.

[0035] Specifically, in the second embodiment of the present utility model, the pull-type connection drive structure between the connecting rod 6 and the ratchet wheel 7 is as follows: Figure 4 and Figure 5 As shown, the front end of the connecting rod 6 is formed with a hook 61b, and the ratchet 7 is provided with a reverse hook 74b that cooperates with the hook 61b. The hook 61b and the reverse hook 74b are kept in hook connection. In the semi-locked state, the hook 61b does not pull the reverse hook 74b. When the motor 1 reverses an angular displacement, the connecting rod 6 pulls the reverse hook 74b, driving the ratchet 7 to rotate counterclockwise by an angle.

[0036] like Figure 6The figure shows a semi-locked state of the pull-type suction mechanism. At this time, the connecting rod 6 and the ratchet 7 are hooked but not in contact to produce a pulling state. The ratchet 7 and the pawl 8 are both kept in the initial state, and the ratchet 7 and the pawl 8 are kept in a semi-locked state. As the motor 1 reverses, the connecting rod 6 is pulled back and retracted, and the hook 61b of the connecting rod 6 is kept hooked and in contact with the reverse hook 74b of the ratchet 7. The hook 61b generates a pulling force on the reverse hook 74b, and the ratchet 7 continues to rotate counterclockwise by an angular displacement through the push of the connecting rod 6. During the rotation of the ratchet 7, the pawl 8 is pressed to rotate clockwise by an angle, and the arc-shaped lead-in curved surface 82 slides and contacts with the end face of the ratchet 7 between the semi-locked end 72 of the pawl and the fully locked end 73 of the pawl, until the arc-shaped lead-in curved surface 82 abuts against the fully locked end 73 of the pawl, thereby completing the operation. Figure 6 Half lock shown Figure 7 Full lock shown.

[0037] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements all fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A suction mechanism for a car door lock, characterized in that: The invention comprises a motor (1), a first-stage worm (2), a first-stage transmission toothed member (3), a second-stage worm (4), a second-stage transmission toothed member (5), a connecting rod (6), a ratchet wheel (7) and a pawl (8), wherein the first-stage worm (2) is transmission-connected to the motor (1), the first-stage transmission toothed member (3) is meshed with the first-stage worm (2), the second-stage worm (4) is fixedly connected to the axis of the first-stage transmission toothed member (3), and the second-stage transmission toothed member (5) is rotatably mounted on a fixed shaft ( The second-stage transmission gear (5) is provided with a latch (52) at a position close to the wheel rim. One end of the connecting rod (6) is connected to the latch (52), and the other end is connected to the ratchet (7) in a clutchable manner. When the motor (1) rotates forward or reversely by an angular displacement, the connecting rod (6) pushes or pulls the ratchet (7) to rotate, and the ratchet (7) changes from a semi-locked position to a fully locked position and meshes with the pawl (8), completing the door lock's suction action.

2. The suction mechanism of the automobile door lock according to claim 1, characterized in that: A ratchet damping shaft (71) is provided at the rotation axis of the ratchet (7); a ratchet semi-locking end (72) and a ratchet fully-locking end (73) are formed at one end of the ratchet (7) that cooperates with the ratchet (8); a ratchet damping shaft (81) is provided at the rotation axis of the ratchet (8); and an arc-shaped introduction curved surface (82) that cooperates with the ratchet semi-locking end (72) and the ratchet fully-locking end (73) is provided at the tooth end of the ratchet (8).

3. The suction mechanism of the automobile door lock according to claim 1, characterized in that: The second-stage worm (4) is provided with a rotating member (41) which serves as the rotating axis of the first-stage transmission tooth member (3).

4. The suction mechanism of the automobile door lock according to claim 3, characterized in that: There are two rotating members (41), which are rotatably sleeved on the two ends of the rod body of the second-stage worm (4), one in front and one in the back.

5. The suction mechanism of the automobile door lock according to claim 4, characterized in that: The rotating member (41) is a bearing or a sleeve.

6. The suction mechanism of the automobile door lock according to claim 1, characterized in that: The first-stage transmission toothed component (3) is a worm wheel, and the second-stage transmission toothed component (5) is a worm wheel.

7. The suction mechanism of the automobile door lock according to claim 1, characterized in that: The front end of the connecting rod (6) is formed with a pushing end (61a), and the ratchet (7) is provided with a positive hook (74a) cooperating with the pushing end (61a). The pushing end (61a) includes a flat step portion (61a1) located on the inner side and an arc-shaped protruding portion (61a2) located on the outer side. The flat step portion (61a1) abuts against the positive hook (74a) when the motor (1) rotates forward by an angular displacement.

8. The suction mechanism of the automobile door lock according to claim 1, characterized in that: A pull hook (61b) is formed at the front end of the connecting rod (6), and the ratchet wheel (7) is provided with a reverse hook (74b) that cooperates with the pull hook (61b) and is hooked.

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