Electric door panel limit position buffer mechanism and electric door using the buffer mechanism

Abstract

The present invention discloses an electric door panel limit position buffer mechanism and an electric door using the buffer mechanism. In the mechanism, the power gearbox on the housing assembly and the rack of the door panel assembly are meshed with each other. When the door panel assembly reaches the limit position, a relative movement is formed between the rack and the door panel assembly for limiting the electric door panel. The rack can move relative to the door panel assembly in the horizontal direction. When the electric door panel has reached the limit position and cannot continue to move, the transport gearbox will continue to push the rack to move a certain distance. In this process, the power gearbox can be given a sufficient deceleration process to prevent the stall noise caused by the sudden stop of the motor. A set structure of a guide shaft and a spring is installed on the rack, which can effectively prevent the door panel from resonating with vibration sources such as speakers and motors, and suppress vibration noise; the photoelectric sensor and the sensor baffle cooperate with each other to grasp the movement state of the door panel assembly in real time, and ensure the position accuracy of the electric door panel hitting the limit position.

Description

Technical Field

[0001] The present invention relates to a limit buffer mechanism and an electric door, in particular to an electric door panel limit buffer mechanism and an electric door using the buffer mechanism, belonging to the technical field of mechanical transmission. Background Art

[0002] Conventional electric door panel opening and closing sliding mechanisms can produce knocking noises when the electric door panel reaches its limit position during opening or closing, as well as stalling noises caused by the motor's inadequate braking. While eliminating this noise, it's also crucial to ensure the accuracy of the electric door panel's position when it hits the limit position. These issues have yet to be fully addressed, and they no longer meet consumer needs. Summary of the Invention

[0003] The purpose of the present invention is to provide an electric door panel limit position buffer mechanism and an electric door using the buffer mechanism. The first technical problem to be solved is to eliminate the impact noise generated when the electric door moves to the limit position. The second technical problem to be solved is to ensure the accuracy of the position accuracy of the electric door panel hitting the limit position and solve the shortcomings of the existing technology.

[0004] The present invention provides the following solutions:

[0005] A limit position buffer mechanism for an electric door panel includes a shell assembly and a door panel assembly for realizing the opening and closing of the electric door panel, the shell assembly is provided with a prime mover for driving the door panel assembly to move, and the door panel assembly is provided with a follower corresponding to the prime mover, and is characterized in that the prime mover is a power gear box installed on the shell assembly, and the follower is a rack meshed with the power gear box. When the door panel assembly reaches the limit position, a relative motion is formed between the rack and the door panel assembly for limiting and buffering the electric door panel.

[0006] Furthermore, a guide rail is provided on the shell assembly for relative movement with the door panel assembly, and the door panel assembly can be slidably mounted on the guide rail. A sliding support seat is fixedly mounted on the door panel assembly, and the rack is arranged on the upper side of the sliding support seat. Teeth corresponding to the power gear box are provided above the rack, and an oblong hole is provided on the rack. The fastening screw passes through the oblong hole in a vertical direction to mount the rack on the sliding support seat, and the rack can move horizontally within the inner contour of the oblong hole under the restriction of the fastening screw.

[0007] Furthermore, a guide shaft support seat is provided in the middle of the sliding support seat, and two ribs are provided on the side of the rack facing the sliding support seat. A guide shaft is fixedly installed on each rib, and springs are respectively installed on the opposite ends of the two guide shafts.

[0008] Furthermore, a photoelectric sensor for triggering the electric door limit position sensing is installed on the housing assembly, and a sensor baffle for triggering the photoelectric sensor is installed on the door panel assembly.

[0009] Furthermore, the photoelectric sensor is a U-shaped photoelectric sensor, and one end of the sensor baffle is provided with a bent portion, and the shape of the bent portion corresponds to the opening shape of the U-shaped photoelectric sensor.

[0010] Furthermore, there are two U-shaped photoelectric sensors, namely a first U-shaped photoelectric sensor and a second U-shaped photoelectric sensor, and the first U-shaped photoelectric sensor and the second U-shaped photoelectric sensor are arranged on the same straight line.

[0011] Furthermore, the number of the oblong holes is two, and the positions of the oblong holes are located on the horizontal line of the rack.

[0012] Furthermore, the number of the fastening screws is the same as the number of the oblong holes.

[0013] Furthermore, vibration-damping rubber pads are installed at both ends of the guide rail.

[0014] An electric door is provided with the electric door panel limit position buffer mechanism.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The rack is fixed by fastening screws in the vertical direction and can move horizontally. The range of movement is limited to the length of the inner contour of the oblong hole. When the electric door panel has reached the limit and cannot move further, the power gearbox will continue to push the rack to move a certain distance. This distance is the distance of relative movement between the rack and the door panel assembly. In this process, the power gearbox can be given sufficient deceleration process to prevent the stall noise caused by the sudden stop of the motor.

[0017] The rack is equipped with a guide shaft and spring, which can effectively prevent the door panel from resonating with the speaker, motor and other vibration sources, thereby suppressing vibration noise.

[0018] A photoelectric sensor is installed on the shell assembly, and a sensor baffle corresponding to the photoelectric sensor is installed on the door panel assembly. When the door panel assembly moves, the photoelectric sensor can be triggered in time, and the movement status of the door panel assembly can be grasped in real time, providing strong guarantee for ensuring the position accuracy of the electric door panel hitting the limit position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is the front view of the electric door panel limit position buffer mechanism;

[0021] Figure 2 This is the rear view of the electric door panel limit position buffer mechanism;

[0022] Figure 3 This is a three-dimensional diagram of the electric door panel limit position buffer mechanism;

[0023] Figure 4 This is an exploded view of the electric door panel limit position buffer mechanism;

[0024] Figure 5 It is a front view of the door panel assembly;

[0025] Figure 6 This is an exploded view of the door panel assembly;

[0026] Figure 7 This is the assembly drawing of the guide shaft and spring in the door panel assembly;

[0027] Figure 8 is a front view of the housing assembly;

[0028] Figure 9 is a perspective view of the housing assembly;

[0029] Figure 10 It is a top view of the rack;

[0030] Figure 11 It is the plane assembly drawing of the door panel and the shell;

[0031] Figure 12 It is a three-dimensional assembly diagram of the door panel and the shell;

[0032] Figure 13 yes Figure 12 A partial enlarged view of . DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] The central idea of ​​the present invention is to provide an electric door panel limit position buffer mechanism, and to provide an electric door panel using the limit position buffer mechanism. This electric door panel limit position buffer mechanism includes a shell assembly and a door panel assembly. The shell assembly and the door panel assembly cooperate with each other to realize the opening and closing of the electric door panel. The shell assembly is provided with a prime mover for driving the door panel assembly to move. The door panel assembly is provided with a follower corresponding to the prime mover. The correspondence between the follower and the prime mover means that the follower receives the power drive of the prime mover. The prime mover is a power gearbox installed on the shell assembly, and the follower is a rack meshed with the power gearbox. The prime mover generates driving force through the motor and drives the follower to move under certain constraints. In the present invention, when the door panel assembly reaches the limit position, a relative motion is formed between the rack and the door panel assembly for limiting the electric door panel. Since relative movement occurs between the rack and the door panel assembly when the door panel assembly reaches the limit position, it acts as a buffer, avoiding the motor stalling noise caused by the sudden stop of the door panel. It can also sense the position of the door panel assembly in real time through the sensor to ensure the position accuracy of the electric door panel hitting the limit position.

[0037] In this embodiment, a guide rail 23 is provided on the housing assembly for relative motion with the door panel assembly. The door panel assembly is slidably mounted on the guide rail 23. A sliding support seat 19 is fixedly mounted on the door panel assembly. Vibration-damping rubber pads are mounted at both ends of the guide rail 23, with a vibration-damping rubber pad 5 at one end and a vibration-damping rubber pad 10 at the other end. The vibration-damping rubber pads are made of an elastic material (such as rubber) and can effectively eliminate the impact noise of the door panel 1. The door panel assembly is slidably connected to the housing assembly via the guide rail 23. Key components of the door panel assembly, such as the rack 3 and the sensor baffle 6, are all arranged on the same side of the door panel assembly. Teeth that mesh with the power gearbox 4 are provided above the rack 3. The power gearbox 4 serves as the prime mover and transmits power to the rack 3 through the meshing of the teeth of the gear mounted thereon and the rack 3, thereby achieving power drive for the driven member. The rack 3 is provided with oblong holes (waist-shaped holes), which in this embodiment include oblong holes 20 and oblong holes 21, evenly distributed horizontally on the rack 3. The rack 3 is positioned above the sliding support 19. Fastening screws 17 and 18 pass through the oblong holes 20 and oblong holes 21, respectively, in the vertical direction to mount the rack 3 on the sliding support 19. Fastening screws 17 and 18 only secure the rack 3 perpendicularly to the sliding support 19 but do not restrict the horizontal movement of the rack 3. The oblong holes 20 and oblong holes 21 are both longer than fastening screws 17 and 18, leaving a gap or margin between the fastening screws 17 and 18 and the oblong holes 20 and oblong holes 21 in the horizontal direction. The rack 3 can move horizontally within the inner contours of the oblong holes, and the horizontal movement limit is the horizontal length range of the oblong holes 20 and oblong holes 21.

[0038] The rack 3 is provided with two ribs (reinforcement ribs) on the side facing the sliding support seat 19, namely rib 15 and rib 16, and a guide shaft is fixedly installed on each rib, and the guide shaft 8 is fixedly installed on the rib 15, and the guide shaft 14 is fixedly installed on the rib 16. The guide shaft 8 and the guide shaft 14 are located on the same horizontal line, and springs are set at the opposite ends of the guide shaft 8 and the guide shaft 14, that is, the guide shaft 8 and the guide shaft 14 are set with a spring 9. The guide shaft 8 is set with a spring 9, and the guide shaft 14 is set with a spring 13. The guide shaft set spring means that the spring is installed on the outer surface of the guide shaft, and a guide shaft bracket 22 corresponding to the guide shaft 8 and the spring 9 is provided in the middle of the sliding support seat 19, and a stop block 24 and a stop block 25 are provided on both sides of the guide shaft bracket 22, corresponding to the spring 9 and the spring 13 respectively. The spring 9 is clamped between the stop block 24 and the guide shaft bracket 22, and the spring 13 is clamped between the stop block 25 and the guide shaft bracket 22.

[0039] Taking the leftward sliding motion of the door panel assembly as an example, the vibration damping and sensor principles within the buffer and limiter mechanism are described: When the rack 3 continues to move leftward while the door panel 1 stops, the right end of the spring 9 is pulled leftward by the rib 15 of the rack 3, compressing the spring 9. When the door panel assembly is in the left limit position (door closed), it is constantly under pressure from the spring 9, maintaining a tight hold. This effectively prevents resonance between the door panel 1 and vibration sources such as speakers and motors, thereby suppressing vibration and noise. After being installed into the rack 3, the springs 9 and 13 are in a compressed state, with an initial tension, each restrained by the ribs on either side of the door panel 1. When the rack 3 drives the door panel, because the initial tension is greater than the frictional resistance between the door panel 1 and the housing 2, the springs remain uncompressed until the limit position is reached. The rack 3 compresses the two springs via ribs 15 and 16. When one spring is compressed, the other does not counteract or interfere with the elastic force of the buffer and limiter mechanism. As can be seen from the accompanying drawings, spring 13 is blocked by block 25 on door panel 1 and does not exert any force on spring 9 (the force on the rack is the K value of a single spring). Without the block, the forces of the two springs would cancel each other out, preventing the force from increasing rapidly according to the designed K value. The same applies when the rack moves in the opposite direction.

[0040] A first U-shaped photoelectric sensor 7 and a second U-shaped photoelectric sensor 11 for triggering the electric door limit position sensing are installed on the housing assembly. The first U-shaped photoelectric sensor and the second first U-shaped photoelectric sensor are arranged on the same straight line. A sensor baffle 6 for triggering the photoelectric sensor is installed on the door panel assembly. A curved portion is provided at one end of the sensor baffle 6. The shape of the curved portion corresponds to the opening shape of the U-shaped photoelectric sensor. The sensor response is triggered by passing through the first U-shaped photoelectric sensor 7 and the second U-shaped photoelectric sensor 11. When the door panel assembly slides to the left, before it hits the limit position and the vibration damping rubber pad 5, the sensor baffle 6 will trigger the first U-shaped photoelectric sensor 7. In this state, the distance between the left limit point of the door panel 1 and the vibration damping rubber pad 5 is set to A. The specific value of distance A is accumulated according to the tolerance of each related part to ensure that the first U-shaped photoelectric sensor 7 is in the triggered state when the door panel 1 reaches the limit position. Door panel 1 has reached its left limit and cannot move further to the left. The power gearbox 4 continues to push rack 3 to the left for a distance set to B. During this movement, the power gearbox 4 gradually decelerates and stops, completing the entire door panel's leftward sliding motion (closing the door). This process provides the power gearbox 4 with sufficient deceleration to prevent noise caused by sudden motor stalling. The maximum displacement of rack 3 on door panel 1 is set to distance C. The mechanism is designed to achieve C>B>A, ensuring a stable and safe stop of the door panel assembly at its left limit.

[0041] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric door panel limit position buffer mechanism, comprising a housing assembly and a door panel assembly for realizing electric door panel opening and closing, wherein the housing assembly is provided with a driving member for driving the door panel assembly to move, and the door panel assembly is provided with a driven member corresponding to the driving member, characterized in that: The driving member is a power gear box installed on the housing assembly, and the driven member is a rack meshed with the power gear box. When the door panel assembly reaches the limit position, a relative movement for limiting and buffering the electric door panel is formed between the rack and the door panel assembly; a guide rail for relative movement with the door panel assembly is provided on the housing assembly, and the door panel assembly is slidably mounted on the guide rail, and a sliding support seat is fixedly mounted on the door panel assembly, and the rack is arranged on the upper side of the sliding support seat, and teeth meshing with the power gear box are provided above the rack, and an oblong hole is provided on the rack, and a fastening screw passes through the oblong hole in the vertical direction to mount the rack on the sliding support seat, and the rack can move horizontally in the inner contour of the oblong hole under the restriction of the fastening screw; a guide shaft bracket is provided in the middle part of the sliding support seat, and two ribs are provided on the side of the rack facing the sliding support seat, and a guide shaft is fixedly mounted on each rib, and springs are respectively installed on the opposite ends of the two guide shafts.

2. The electric door panel limit position buffer mechanism according to claim 1, characterized in that: A photoelectric sensor for triggering the electric door limit position sensing is installed on the housing assembly, and a sensor baffle for triggering the photoelectric sensor is installed on the door panel assembly.

3. The electric door panel limit position buffer mechanism according to claim 2, characterized in that: The photoelectric sensor is a U-shaped photoelectric sensor. One end of the sensor baffle is provided with a bent portion, and the shape of the bent portion corresponds to the opening shape of the U-shaped photoelectric sensor.

4. The electric door panel limit position buffer mechanism according to claim 3, characterized in that: There are two U-shaped photoelectric sensors, namely a first U-shaped photoelectric sensor and a second U-shaped photoelectric sensor, and the first U-shaped photoelectric sensor and the second U-shaped photoelectric sensor are arranged on the same straight line.

5. The electric door panel limit position buffer mechanism according to claim 4, characterized in that: There are two oblong holes, and the oblong holes are located on the horizontal line of the rack.

6. The electric door panel limit position buffer mechanism according to claim 5, characterized in that: The number of the fastening screws is the same as the number of the oblong holes.

7. The electric door panel limit position buffer mechanism according to claim 6, characterized in that: Vibration-damping rubber pads are installed at both ends of the guide rail.

8. An electric door, characterized in that: The electric door is provided with an electric door panel limit position buffer mechanism according to any one of claims 1 to 7.

Images