An electric limiter for automobile side door

Abstract

The present invention discloses an electric limiter for a side door of a vehicle, comprising: a housing; a power assembly installed in the housing; a sensor connected to the power assembly for sensing the position, speed and direction of the opening and closing of the side door of the vehicle; a transmission assembly installed in the housing, comprising a double worm gear, a double gear and a rack, wherein the large end of the double worm gear is connected to the power assembly, the small end of the double worm gear is meshed with the large end of the double gear, and the small end of the double gear is meshed with the rack; one end of the rack is arranged in the door, and the other end is connected to a vehicle body fixing bracket through a movable connection device; one end of the movable connection device is hinged to the vehicle body fixing bracket, and the other end is hinged to the rack. The present invention realizes the electrification of the opening and closing of the door, and at the same time reduces the envelope of the limiter in a narrow space, improves the strength of the actuator, and thus improves the reliability and adaptability of the product.

Description

Technical Field

[0001] The invention relates to a vehicle side door limiter, in particular to an electric limiter for a vehicle side door. Background Art

[0002] At present, the application of electric opening and closing technology in tailgates and side sliding doors has been relatively mature. Electric tailgates are not only widely seen in luxury models, but also increasingly used in compact models. However, the application of electric opening and closing technology in vehicle side doors is still in the initial stage of development. Developers use their own technical expertise to give full play to their own advantages to achieve the function of electric opening and closing. However, since the limit arm of the crank slider mechanism of the traditional mode limiter needs to swing when working, the motion envelope space of the entire component is large, and the electric limiter has more parts and a larger volume than the traditional limiter. Due to the limitation of the space of the vehicle side door, the design is more difficult. Therefore, some manufacturers adopt an electric push rod solution similar to the electric tailgate, or a wire rope solution similar to the window glass lifter, but the former requires a larger hole on the side of the door to meet the motion envelope space of the electric push rod, and the latter has the problem of deformation and elongation of the rope affecting the protection of anti-pinch and anti-collision. Summary of the invention

[0003] In order to solve the shortcomings of the prior art, the present invention provides a limiter for a vehicle side door, which uses a rack as a guide rod and a small connecting rod is connected to one end of the rack. This rack assembly does not need to swing, and while meeting the function of electrically opening and closing the vehicle side door, it reduces the required envelope space.

[0004] To achieve the above object, the present invention proposes the following technical solutions:

[0005] An electric limiter for a vehicle side door comprises a housing; a power assembly installed in the housing; a sensor connected to the power assembly and used to sense the position, speed and direction of the opening and closing of the vehicle side door; a transmission assembly installed in the housing, comprising a double worm wheel, a double gear and a rack, wherein the large end of the double worm wheel is connected to the power assembly, the small end of the double worm wheel is meshed with the large end of the double gear, and the small end of the double gear is meshed with the rack;

[0006] One end of the rack is arranged in the vehicle door, and the other end is connected to the vehicle body fixing bracket through a movable connection device;

[0007] One end of the movable connection device is hinged to the vehicle body fixing bracket, and the other end is hinged to the rack.

[0008] The present invention uses a rack as a guide rod, and one end of the rack connected to the vehicle body fixing bracket is provided with a movable connection device, so that the rack does not need to swing, while meeting the function of electrically opening and closing the vehicle side door, while reducing the required envelope space.

[0009] As a further improvement of the present invention, the movable connection device includes a small connecting rod, a first pin and a second pin, the small connecting rod and the vehicle body fixing bracket are connected through the first pin, and the small connecting rod and the rack are connected through the second pin.

[0010] As a further improvement to the present invention, the small connecting rod includes connecting pieces which are arranged in parallel up and down.

[0011] As a further improvement of the present invention, the inner wall of the shell is provided with protrusions at the positions where the rack enters and exits the shell, and the protrusions are opposite to each other in pairs and are in contact with the side surfaces of the rack respectively.

[0012] As a further improvement to the present invention, a support plate is fixedly installed in the housing, and the rack is arranged above the support plate and slides relative to the support plate.

[0013] As a further improvement of the present invention, an arc-shaped protrusion is provided on the upper surface of the support plate, which is matched with the bottom of the rack.

[0014] As a further improvement of the present invention, the support plate is installed in the housing through a fifth pin, and the fifth pin is provided with a groove recessed from both ends toward the center in its axial direction, and the support plate is clamped in the groove.

[0015] As a further improvement of the present invention, the power assembly includes a motor and a worm, the worm is arranged on the motor shaft of the motor, and the large end of the double worm wheel is meshed with the worm.

[0016] As a further improvement of the present invention, the sensor includes a magnet and an inductive device, the magnet is fixed on the rotating shaft of the motor, and the inductive device is fixed on the motor and distributed on one side of the magnet.

[0017] The design structure of the present invention is compact and can realize the motorized opening and closing of the vehicle door. The setting of the small connecting rod structure further reduces the envelope of the limiter in a narrow space. The original limiter on the vehicle door can be replaced and installed without changing the opening, and the strength of the actuator is improved, thereby improving the reliability and adaptability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 The electric limiter Figure 1 The cross-sectional view of line AA in the figure;

[0021] Figure 3 It is a schematic diagram of the connection between the rack and the small connecting rod;

[0022] Figure 4 It is a schematic diagram of the structure of a double gear and a double worm gear;

[0023] Figure 5 It is a schematic diagram of the structure in which the support plate is connected with the pin and the rack;

[0024] Figure 6 It is a schematic diagram of the connection structure between the rack near the small connecting rod end and the housing;

[0025] Figure 7 It is a schematic diagram of the connection structure between the rack and the housing away from the small connecting rod end;

[0026] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure.

[0027] In the figure, the numbers represent the following meanings: 1-body fixing bracket, 2-first pin, 3-second pin, 4-housing, 5-worm, 6-motor, 7-magnet, 8-induction device, 9-double worm gear, 10-third pin, 11-double gear, 12-fourth pin, 13-fifth pin, 14-support plate, 15-rack, 16-small connecting rod, 17-bump. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be described clearly and completely in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work belong to the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular form of "one", "one" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of "including" or "comprising" include the features, wholes, steps, operations, elements and / or components listed after "including" or "comprising", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0029] Example 1

[0030] As shown in the figure, an electric limiter for a vehicle side door includes a housing 4, a power assembly, a transmission assembly and a sensor. The sensor is connected to the power assembly, the power assembly is connected to the transmission assembly, the transmission assembly is connected to a vehicle body fixing bracket 1, the transmission assembly is arranged in the housing 4, and the vehicle body fixing bracket 1 is fixed to the vehicle body.

[0031] In this embodiment, the sensor includes a magnet 7 and an induction device 8, and the sensor senses the position, speed and direction of the door opening and closing through the rotation of the motor shaft. The power assembly is fixed on the housing 4, and includes a worm 5 and a motor 6, and the worm 5 is arranged on the motor shaft of the motor 6.

[0032] Specifically, the magnet 7 is fixed on the shaft of the motor 6 and rotates with the motor 6 . The induction device 8 is fixed on the motor 6 through an intermediate piece and arranged beside the magnet 7 . The induction device 8 can also be directly fixed on the motor 6 .

[0033] The transmission assembly includes: a double worm wheel 9 meshing with the worm 5 , a double gear 11 meshing with the small end of the double worm wheel 9 , and a rack 15 meshing with the small end of the double gear 11 .

[0034] The duplex worm gear 9 and the duplex gear 11 are fixedly mounted on the housing 4 by a third pin 10 and a fourth pin 12 respectively.

[0035] The rack 15 is meshed with the small end of the double gear 11 , and the bottom surface of the rack 15 slides on the support plate 14 . The two ends of the support plate 14 are fixedly mounted on the housing 4 through two fifth pins 13 .

[0036] Specifically, an arc-shaped protrusion is provided on the upper side of the support plate 14 , which is matched with the bottom of the rack 15 .

[0037] Specifically, the fifth pin 13 is provided with grooves sunken from both ends toward the center in the axial direction, and the support plate 14 is stuck in the groove of the fifth pin 13 to limit the movement of the support plate 14 in the vertical direction of the rack 15.

[0038] An active connection device is provided between the rack 15 and the vehicle body fixing bracket 1, and the active connection device comprises a small connecting rod 16, a first pin 2 and a second pin 3. One end of the active connection device is hinged to the vehicle body fixing bracket 1, and the other end is hinged to the rack 15.

[0039] Specifically, the widths at both ends of the small connecting rod 16 are slightly greater than the width in the middle, and the entire connecting rod 16 presents a waist-shaped structure.

[0040] Specifically, one end of the small connecting rod 16 is connected to the rack 15 through the second pin 3, and the other end of the small connecting rod 16 is connected to the vehicle body fixing bracket 1 through the first pin 2. The design of the small connecting rod can make the electric limiter of the present invention compact and avoid occupying more space due to the left and right swing of the rack.

[0041] Specifically, the small connecting rod 16 includes two connecting pieces, which are arranged in parallel up and down; one end of the two connecting pieces is respectively arranged on the upper outer surface and the lower outer surface of the rack 15, and the other end is respectively arranged on the upper inner surface and the lower inner surface of the vehicle body fixing bracket 1. The small connecting rod structure is simple in design and light.

[0042] The movable connection device is not limited to the above structure, and any structure that can enable the vehicle body fixing bracket 1 and the rack 15 to rotate relative to each other and achieve a small swing is within the protection scope of the present invention.

[0043] The inner wall of the housing 4 is provided with protrusions 17 at the position where the rack 15 enters and exits the housing 4. The protrusions 17 are arranged opposite to each other in pairs and contact the side surfaces of the rack 15 respectively to limit the running direction of the rack, so that the rack can move left and right relatively stably in the opening portion opened on the housing.

[0044] In the working practice of the electric limiter for the side door of the automobile, when the control system receives the door opening / closing command, the motor 6 is started, and the motor 6 drives the double worm gear 9 through the worm 5 on the motor shaft, and the small gear at the small end of the double worm gear 9 drives the double gear 11, and the small gear at the small end of the double gear 11 pushes / pull the rack 15, and the rack 15 pushes / pull the door to open / close through the second pin 3, the small connecting rod 16, the first pin 2 and the body fixing bracket 1 (fixed on the body).

[0045] When the door needs to be opened / closed manually, the door pulls / pushes the rack 15 through the body fixing bracket 1, the first pin 2, the small connecting rod 16 and the second pin 3, and the rack 15 drives the double gear 11 to rotate. The double gear 11 drives the double worm gear 9 to rotate through the large end. The double worm gear 9 drives the worm 5 and the motor shaft of the motor 6 to rotate through the large end, and the magnet 7 on the motor shaft rotates accordingly. The control system determines the direction and speed of the door movement through the sensing device 8 to assist in controlling the rotation direction and speed of the motor 6, thereby simulating a state of manual operation by humans, making the operation of manually opening / closing the door easier.

[0046] The present invention is not limited to the above-mentioned embodiments as examples, and other structural variations are possible. In particular, the sensor is not limited to being arranged on the motor shaft, but can also be arranged on other rotatable central shafts. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

[0047] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. An electric limiter for a vehicle side door, characterized in that: include: shell; A power assembly is installed in the housing; A sensor, connected to the power assembly, for sensing the position, speed and direction of opening and closing of the vehicle side door; A transmission assembly is installed in the housing, and includes a double worm gear, a double gear and a rack, wherein the large end of the double worm gear is connected to the power assembly, the small end of the double worm gear is meshed with the large end of the double gear, and the small end of the double gear is meshed with the rack; One end of the rack is arranged in the vehicle door, and the other end is connected to the vehicle body fixing bracket through a movable connection device; One end of the movable connection device is hinged to the vehicle body fixing bracket, and the other end is hinged to the rack; Among them, the power assembly includes a motor and a worm, the worm is arranged on the motor shaft of the motor, and the large end of the double worm wheel is meshed with the worm; the sensor includes a magnet and an induction device, the magnet is fixed on the rotating shaft of the motor, and the induction device is fixed on the motor and distributed on one side of the magnet; the inner wall of the shell is provided with protrusions at the position where the rack enters and exits the shell, and the protrusions are opposite to each other and respectively contact the side surfaces of the rack.

2. The electric limiter for a vehicle side door according to claim 1, characterized in that: The movable connection device comprises a small connecting rod, a first pin and a second pin. The small connecting rod and the vehicle body fixing bracket are connected through the first pin, and the small connecting rod and the rack are connected through the second pin.

3. The electric limiter for a vehicle side door according to claim 2, characterized in that: The small connecting rod comprises connecting pieces which are arranged in parallel up and down.

4. The electric limiter for a vehicle side door according to claim 1, characterized in that: A support plate is fixedly installed in the shell, and the rack is arranged above the support plate and slides relative to the support plate.

5. The electric limiter for a vehicle side door according to claim 4, characterized in that: The upper surface of the support plate is provided with an arc-shaped protrusion which is matched with the bottom of the rack.

6. The electric limiter for a vehicle side door according to claim 4, characterized in that: The support plate is installed in the housing through a fifth pin. The fifth pin is provided with a groove in the axial direction thereof which is recessed from both ends toward the center. The support plate is clamped in the groove.

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