A door check

Abstract

The utility model provides a kind of vehicle door limiter, it is related to the technical field of vehicle-mounted equipment.The vehicle door limiter includes motor, deceleration component, commutating component, screw rod, mobile sleeve and push rod.The input end of deceleration component is connected to the output shaft of motor;The input end of commutating component is connected to the output end of deceleration component;One end of screw rod is connected to the output end of commutating component, and the other end is rotatably connected to vehicle door;Mobile sleeve is screwed on screw rod outside, and can move back and forth along the length direction of screw rod;One end of push rod is connected to mobile sleeve, and the other end is provided with vehicle body support.Wherein, commutating component is located at the front end of screw rod, and is arranged along the height direction of screw rod;Deceleration component and motor are arranged along the length direction of screw rod.The utility model embodiment is compactly arranged along the length direction of screw rod by motor and deceleration component, makes full use of internal space, and commutating component is located at the front end of screw rod and is arranged along height direction, which further reduces the occupied space of overall device.

Description

Technical Field

[0001] This utility model belongs to the technical field of vehicle-mounted equipment, and in particular relates to a door limiter. Background Technology

[0002] As a key device in vehicles used to control the opening and closing of doors, the door limiter faces increasingly higher demands in terms of functionality and structural compactness with the continuous advancement of the automotive industry. In other words, while ensuring smooth opening and closing of the door, efforts are also being made to reduce the space it occupies.

[0003] In existing technologies, door limiters often have the problem of being too large, making it difficult to meet the needs of modern automobiles for detailed optimization. Utility Model Content

[0004] In view of this, the present invention provides a door limiter, which aims to solve the problem that the existing door limiters are large in size and occupy a lot of space, while improving their functionality and structural compactness.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model embodiment provides a door limiter, comprising: a motor, the housing of which is used to connect to a door; a reduction assembly, the input end of which is connected to the output shaft of the motor; a reversing assembly, the input end of which is connected to the output end of the reduction assembly; a lead screw, one end of which is connected to the output end of the reversing assembly, and the other end of which is rotatably connected to the door; a movable sleeve, screwed onto the lead screw and movable back and forth along the length direction of the lead screw; and a push rod extending along the length direction of the lead screw. One end of the push rod is connected to the movable sleeve, and the other end is provided with a body bracket for connecting to the vehicle body. The reversing assembly is located at the front end of the lead screw and is arranged along the height direction of the lead screw. The reduction assembly and the motor are arranged along the length direction of the lead screw.

[0007] In one embodiment, the reduction assembly includes a planetary gear reduction module and a low-tooth-difference reduction module arranged along the length of the lead screw. The low-tooth-difference reduction module includes an internal gear and an external gear ring meshing with the internal gear. The number of teeth on the internal gear is less than the number of teeth on the external gear ring, and the internal gear rotates within the external gear ring. The planetary gear reduction module includes a sun gear, planet gears driven and connected to the sun gear, a gear ring track meshing with the outer side of the planet gears, and a planet carrier connected to the planet gears. The gear ring track is fixed to the housing of the motor, the output shaft of the motor is connected to the internal gear, the external gear ring is connected to the sun gear, and the planet carrier is connected to the input end of the commutation assembly.

[0008] In one embodiment, the reversing assembly includes a first helical gear and a second helical gear that mesh with each other. The first helical gear and the second helical gear are arranged along the height direction of the lead screw. The core of the first helical gear is connected to the output end of the reduction assembly, and the core of the second helical gear is connected to the front end of the lead screw.

[0009] In one embodiment, the system further includes a spherical bearing, the inner ring of which is fixedly connected to the movable sleeve, and the outer ring of which is fixedly connected to the push rod.

[0010] In one embodiment, the device further includes: a housing having a first receiving cavity, a second receiving cavity, and a third receiving cavity communicating with one end of the first receiving cavity and the second receiving cavity; a front cover disposed at the front end of the housing; and a rear cover disposed at the rear end of the housing; wherein the housing, the front cover, and the rear cover are fixed to the vehicle door; the motor and the reduction assembly are disposed in the first receiving cavity, the lead screw and the push rod are disposed in the second receiving cavity, and the reversing assembly is disposed in the third receiving cavity; the rear cover has a through hole through which the push rod passes, and the width of the through hole is greater than the width of the push rod; the rear end of the lead screw is rotatably connected to the rear cover.

[0011] In one embodiment, the push rod is formed with an arc along the length of the lead screw; the curvature of the arc gradually increases from both ends of the push rod to the center of the push rod.

[0012] In one embodiment, the inner wall surface of the housing is provided with a slide rail, the slide rail extends along the length direction of the lead screw, and the push rod is slidably connected to the slide rail.

[0013] In one embodiment, a support bearing is provided at the end of the lead screw away from the reversing assembly, and the support bearing is disposed inside the rear cover.

[0014] In one embodiment, a circuit board is provided at the end of the motor opposite to the reduction assembly; the circuit board is aligned with the motor in the radial direction; the reduction assembly, the motor, and the circuit board are arranged sequentially along the length of the lead screw.

[0015] In one embodiment, the push rod is disposed below the lead screw.

[0016] The door limiter provided in this embodiment includes a motor, a reduction gear assembly, a reversing assembly, a lead screw, a movable sleeve, and a push rod. The motor housing is used to connect to the door; the input end of the reduction gear assembly is connected to the output shaft of the motor; the input end of the reversing assembly is connected to the output end of the reduction gear assembly; one end of the lead screw is connected to the output end of the reversing assembly, and the other end is rotatably connected to the door; the movable sleeve is screwed onto the lead screw and can move back and forth along the length of the lead screw; the push rod extends along the length of the lead screw; one end of the push rod is connected to the movable sleeve, and the other end is provided with a body bracket for connecting to the vehicle body. The reversing assembly is located at the front end of the lead screw and is arranged along the height direction of the lead screw; the reduction gear assembly and the motor are arranged along the length direction of the lead screw. This embodiment of the invention fully utilizes the internal space by compactly arranging the motor and reduction gear assembly along the length direction of the lead screw, and the reversing assembly being located at the front end of the lead screw and arranged along the height direction further reduces the overall space occupied by the device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A first-view schematic diagram of the internal structure of a door limiter according to an embodiment of the present invention;

[0019] Figure 2 A second-view schematic diagram of the internal structure of a door limiter according to an embodiment of the present invention;

[0020] Figure 3 for Figure 1 A schematic diagram of the external structure of the door limiter.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Motor; 2. Reduction assembly; 3. Reversing assembly; 31. First helical gear; 32. Second helical gear; 4. Lead screw; 5. Moving sleeve; 6. Push rod; 61. Body bracket; 7. Spherical bearing; 81. Housing; 82. Front cover; 83. Rear cover; 831. Through hole; 832. Support bearing; 9. Circuit board. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] As a key device in vehicles used to control the opening and closing of doors, the door limiter faces increasingly higher demands in terms of functionality and structural compactness with the continuous advancement of the automotive industry. In other words, while ensuring smooth opening and closing of the door, efforts are also being made to reduce the space it occupies.

[0027] In existing technologies, door limiters often have the problem of being too large, making it difficult to meet the needs of modern automobiles for detailed optimization.

[0028] In view of this, the present invention provides a door limiter, which aims to solve the problem that the existing door limiters are large in size and occupy a lot of space, while improving their functionality and structural compactness.

[0029] Please see Figure 1 and Figure 2The door limiter includes a motor 1, a reduction gear assembly 2, a reversing assembly 3, a lead screw 4, a moving sleeve 5, and a push rod 6. The motor 1 provides power, and its housing 81 is connected to the door to ensure the stability of the overall structure. The reduction gear assembly 2 uses a multi-stage reduction design to reduce the output speed of the motor 1 while increasing torque to meet the force requirements of the door limiter in different opening and closing states. The reversing assembly 3 is responsible for reversing the direction of the power transmitted by the reduction gear assembly 2, enabling the lead screw 4 to rotate in a predetermined position and direction. The design of the lead screw 4 allows the moving sleeve 5 to move smoothly in the length direction, thereby driving the push rod 6 to achieve telescopic movement. One end of the push rod 6 is connected to the vehicle body via a body bracket 61, ensuring that the entire device maintains a stable working state during door movement.

[0030] The reduction assembly 2 may include at least one of a planetary gear reduction module and a low-tooth-difference reduction module. If the reduction assembly 2 includes both, they may be arranged along the length direction of the lead screw 4, or along the extension direction of the output shaft of the motor 1. The length direction of the lead screw 4 is represented by the dashed line a in the figure.

[0031] The reversing assembly 3 can be two meshing gears or other reversing assemblies 3, as long as they can achieve reversing. Due to the setting of the reversing assembly 3, the overall length of the door limiter can be reduced, thus making the door limiter structure compact.

[0032] Please see Figure 1 and Figure 2 The specific implementation principle during the opening and closing of the car door is as follows: After the motor 1 starts, it transmits power to the reversing assembly 3 through the reduction assembly 2. The reversing assembly 3 adjusts the direction of power, causing the lead screw 4 to start rotating. As the lead screw 4 rotates, the moving sleeve 5 moves smoothly along its length and pushes the push rod 6 to extend and retract. The movement of the push rod 6 is linked with the car body through the body bracket 61, thereby realizing the opening and closing control of the car door.

[0033] The door limiter provided in this embodiment includes a motor 1, a reduction assembly 2, a reversing assembly 3, a lead screw 4, a movable sleeve 5, and a push rod 6. The housing 81 of the motor 1 is used to connect to the door; the input end of the reduction assembly 2 is connected to the output shaft of the motor 1; the input end of the reversing assembly 3 is connected to the output end of the reduction assembly 2; one end of the lead screw 4 is connected to the output end of the reversing assembly 3, and the other end is rotatably connected to the door; the movable sleeve 5 is screwed onto the lead screw 4 and can move back and forth along the length of the lead screw 4; the push rod 6 extends along the length of the lead screw 4; one end of the push rod 6 is connected to the movable sleeve 5, and the other end is provided with a body bracket 61, which is used to connect to the vehicle body. The reversing assembly 3 is located at the front end of the lead screw 4 and is arranged along the height direction of the lead screw 4 (the height direction of the lead screw is represented by the dashed line b in the figure); the reduction assembly 2 and the motor 1 are arranged along the length direction of the lead screw 4. This embodiment of the invention makes full use of the internal space by compactly arranging the motor 1 and the reduction assembly 2 along the length direction of the lead screw 4. The reversing assembly 3 is located at the front end of the lead screw 4 and arranged along the height direction, further reducing the space occupied by the overall device. Furthermore, the cooperative design of the lead screw 4 and push rod 6 not only ensures smooth movement but also improves the control precision during the opening and closing of the door. Therefore, this invention significantly reduces the size of the door limiter while meeting functional requirements, making it more in line with the modern automotive requirements for space utilization and aesthetics.

[0034] In some embodiments, in order to more effectively reduce the output power of the motor 1 and increase the thrust of the push rod 6, the reduction assembly 2 is designed with multi-stage reduction.

[0035] Please see Figure 1 and Figure 2 The specific structure and connection method are as follows: The reduction assembly 2 includes a planetary gear reduction module and a low-tooth-difference reduction module arranged along the length of the lead screw 4. The low-tooth-difference reduction module includes an internal gear and an external gear ring meshing with the internal gear. The number of teeth on the internal gear is less than the number of teeth on the external gear ring, and the internal gear rotates within the external gear ring. The planetary gear reduction module includes a sun gear, planet gears connected to the sun gear, a gear ring track meshing with the outside of the planet gears, and a planet carrier connected to the planet gears. The gear ring track is fixed to the housing 81 of the motor 1. The output shaft of the motor 1 is connected to the internal gear, the external gear ring is connected to the sun gear, and the planet carrier is connected to the input end of the commutation assembly 3.

[0036] Please see Figure 1 and Figure 2The specific deceleration principle is as follows: After motor 1 starts, the output shaft drives the internal gear to rotate. Since the internal gear has fewer teeth than the external gear ring, its rotation drives the external gear ring to rotate at a lower speed, thus achieving the first stage of deceleration. The rotation of the external gear ring is transmitted to the sun gear, which drives the planet gears to rotate around the gear ring's orbit, while the planet gears themselves also rotate. The planet carrier outputs the motion of the planet gears to the commutation assembly 3, completing the second stage of deceleration. Through this two-stage deceleration design, not only is the speed of motor 1 significantly reduced, but the output torque is also significantly increased, providing greater thrust for push rod 6 and ensuring that the door can withstand a greater load during opening and closing.

[0037] This embodiment of the invention, by employing a multi-stage reduction gear assembly 2, effectively reduces the output speed of the motor 1 and increases the thrust of the push rod 6, thereby meeting the needs of the door limiter under different operating conditions. The combined use of the planetary gear reduction module and the low-tooth-difference reduction module makes full use of the internal space, resulting in a more compact overall structure.

[0038] In some embodiments, please refer to Figure 1 and Figure 2 The reversing assembly 3 includes a first helical gear 31 and a second helical gear 32 that mesh with each other. The first helical gear 31 and the second helical gear 32 are arranged along the height direction of the lead screw 4. The core of the first helical gear 31 is connected to the output end of the reduction assembly 2, and the core of the second helical gear 32 is connected to the front end of the lead screw 4. Since the reversing assembly 3 has only two meshing gears, the overall structure of the reversing assembly 3 is simple.

[0039] Please see Figure 1 and Figure 2 The specific reversing principle is as follows: the first helical gear 31 receives power from the output end of the reduction assembly 2, and its rotational motion achieves direction conversion through meshing with the second helical gear 32. Since the two helical gears are arranged along the height direction of the lead screw 4, this design converts the power originally transmitted along the length direction into output along the height direction, thereby effectively reducing the overall length of the device. The core of the second helical gear 32 is directly connected to the front end of the lead screw 4, and after receiving the reversed power, it drives the lead screw 4 to rotate. In this way, the reversing assembly 3 not only achieves a change in the direction of power but also optimizes the spatial layout, making the entire door limiter structure more compact and efficient.

[0040] This embodiment of the utility model uses two helical gears as the core components of the reversing assembly 3. This simple reversing structure not only reduces the number of components and space occupation, but also improves transmission efficiency and reduces the risk of failure that may be caused by complex structures.

[0041] In some embodiments, please refer to Figure 1 and Figure 2The door limiter also includes a spherical bearing 7. The inner ring of the spherical bearing 7 is fixed to the movable sleeve 5, and the outer ring of the spherical bearing 7 is fixed to the push rod 6.

[0042] Specifically, during the opening and closing of the car door, the spherical bearing 7 plays a crucial connecting and adjusting role. When the moving sleeve 5 moves along the length of the lead screw 4, the spherical bearing 7 can flexibly adjust the angle of the push rod 6 to adapt to the changes in the movement trajectory during the opening and closing of the car door. This design not only ensures the stability of the push rod 6 during the extension and retraction process, but also effectively reduces friction or jamming caused by angular deviations.

[0043] Because the spherical plain bearing 7 has multi-directional adjustment capabilities, it can automatically make fine adjustments when the push rod 6 is subjected to external force interference, thereby avoiding the impact of hard impacts on the overall structure. In addition, the use of the spherical plain bearing 7 can also extend the service life of the device because it can disperse stress concentration and reduce wear between components.

[0044] This embodiment of the utility model introduces a spherical bearing 7, which enables the push rod 6 to maintain stable operation under complex working conditions, while improving the working efficiency and durability of the entire door limiter.

[0045] In some embodiments, the external structure of the door limiter is reasonably configured in order to provide stable support and positioning for the internal structure of the door limiter.

[0046] Please see Figure 1 and Figure 3 Specifically, the door limiter includes a housing 81, a front cover 82, and a rear cover 83. The housing 81 has a first receiving cavity, a second receiving cavity, and a third receiving cavity connected to one end of the first and second receiving cavities. The front cover 82 is located at the front end of the housing 81, and the rear cover 83 is located at the rear end of the housing 81. The housing 81, front cover 82, and rear cover 83 are fixed to the door. The motor 1 and the reduction assembly 2 are located in the first receiving cavity, the lead screw 4 and the push rod 6 are located in the second receiving cavity, and the reversing assembly 3 is located in the third receiving cavity. The rear cover 83 has a through hole 831 through which the push rod 6 passes, and the width of the through hole 831 is greater than the width of the push rod 6. The rear end of the lead screw 4 is rotatably connected to the rear cover 83.

[0047] Since the end of the lead screw 4 furthest from the reversing assembly 3 is rotatably connected to the rear cover 83, the rear cover 83 provides stable support for the lead screw 4.

[0048] This embodiment of the invention, through the rational arrangement of the outer shell 81, front cover 82, and rear cover 83, not only provides robust protection for the internal components of the door limiter but also optimizes the overall spatial layout. The interior of the outer shell 81, through a zoned design of a first receiving cavity, a second receiving cavity, and a third receiving cavity, respectively houses the motor 1, the reduction assembly 2, the lead screw 4, the push rod 6, and the reversing assembly 3 within their respective functional areas, avoiding mutual interference between components and facilitating assembly and maintenance. The front cover 82 and rear cover 83 further enhance the sealing and stability of the device. In particular, the design of the through hole 831 on the rear cover 83 allows the push rod 6 to extend and retract flexibly. The detail that the width of the through hole 831 is greater than the width of the push rod 6 effectively reduces the risk of friction and jamming during movement. Furthermore, the rotatable connection between the rear end of the lead screw 4 and the rear cover 83 not only improves the smoothness of the lead screw 4's rotation but also provides it with an additional support point, thereby enhancing the reliability and durability of the entire device.

[0049] In some embodiments, given that the door limiter causes the door to move outward during opening, the push rod 6 is reasonably configured to avoid jamming.

[0050] For details, please refer to Figure 1 and Figure 2 The push rod 6 has an arc along the length of the lead screw 4; the curvature of the arc gradually increases from both ends of the push rod 6 to its center. This arc lies in the horizontal plane. Due to the arc design of the push rod 6, even when the door moves outward and the size of the through hole 831 is small, the push rod 6 can still extend and retract flexibly within the through hole 831.

[0051] The specific telescopic principle is as follows: During the telescopic process, the arc design of the push rod 6 can compensate for the impact of the outward displacement of the car door. When the car door is opened, the gradually increasing arc of the push rod 6 will dynamically cooperate with the edge of the through hole 831 to avoid jamming caused by linear movement.

[0052] This embodiment of the utility model solves the problem of jamming that may be caused by the displacement of the car door by setting an arc structure on the push rod 6.

[0053] In some embodiments, the inner wall surface of the housing 81 is provided with a slide rail, which extends along the length direction of the lead screw 4, and the push rod 6 is slidably connected to the slide rail.

[0054] Thanks to the design of the slide rail, the push rod 6 maintains a more stable trajectory when extending and retracting along the length of the lead screw 4. The slide rail not only guides the push rod 6 but also effectively reduces any wobbling or deviation that may occur during its movement.

[0055] In some embodiments, please refer to Figure 1 and Figure 2 To support the lead screw 4, a support bearing 832 is provided at the end of the lead screw 4 furthest from the reversing assembly 3, and the support bearing 832 is located inside the rear cover 83. This arrangement provides a support point for the lead screw 4, allowing it to maintain stable operation even under heavy loads. This design not only improves the overall performance of the door limiter but also enhances the reliability of the device under complex operating conditions. Furthermore, since the support bearing 832 is installed inside the rear cover 83, its compact layout further optimizes space utilization, making the entire device more concise and efficient.

[0056] In some embodiments, please refer to Figure 2 The motor 1 and circuit board 9 were arranged in a reasonable manner. Specifically, the circuit board 9 was installed at the end of the motor 1 away from the reduction assembly 2; the circuit board 9 was aligned with the motor 1 in the radial direction; the reduction assembly 2, the motor 1 and the circuit board 9 were arranged sequentially along the length of the lead screw 4.

[0057] Circuit board 9, through its alignment design with motor 1, makes full use of the space along the length of motor 1, avoiding additional space occupation. The reduction gear assembly 2, motor 1, and circuit board 9 are arranged sequentially along the length of lead screw 4, further optimizing the compactness of the internal structure. This layout not only shortens the overall height of the device but also makes the connections between components more direct and efficient, reducing energy loss during the energy transfer process.

[0058] Furthermore, this embodiment of the invention controls the motor 1 via circuit board 9, eliminating the need for a damper. The specific control principle is as follows: circuit board 9 has a built-in intelligent control module that automatically adjusts the output power of motor 1 according to different stages of door opening and closing. When the door is in the initial opening or final closing stage, circuit board 9 reduces the speed of motor 1 to reduce impact and improve operational smoothness; while when the door is fully open or requires greater thrust, circuit board 9 increases the torque output of motor 1 to ensure reliable completion of the action. This intelligent control method not only optimizes the working efficiency of the door limiter but also significantly improves the user experience, making the door opening and closing process smoother and quieter.

[0059] By directly aligning the circuit board 9 with the motor 1 and arranging it along the length of the lead screw 4, this embodiment of the invention further reduces the space occupied by the device while ensuring the simplicity of the signal transmission path. Compared with the traditional design that additionally configures a damper, this solution avoids complex mechanical structures and potential failure points, thereby improving the stability and durability of the overall system.

[0060] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A door limiter, characterized in that, include: The motor, whose housing is used to connect to the car door; A speed reduction assembly, the input end of which is connected to the output shaft of the motor; A commutation assembly, wherein the input terminal of the commutation assembly is connected to the output terminal of the deceleration assembly; A lead screw, one end of which is connected to the output end of the reversing assembly, and the other end of which is rotatably connected to the vehicle door; A movable sleeve is screwed onto the outside of the lead screw and can move back and forth along the length of the lead screw; A push rod extends along the length of the lead screw; one end of the push rod is connected to the movable sleeve, and the other end is provided with a vehicle body bracket, which is used to connect to the vehicle body. The reversing assembly is located at the front end of the lead screw and is arranged along the height direction of the lead screw; the deceleration assembly and the motor are arranged along the length direction of the lead screw.

2. The door limiter according to claim 1, characterized in that, The reduction assembly includes a planetary gear reduction module and a low-tooth-difference reduction module arranged along the length of the lead screw, wherein... The low-tooth-difference reduction module includes an internal gear and an external gear ring meshing with the internal gear. The number of teeth on the internal gear is less than the number of teeth on the external gear ring, and the internal gear rotates within the external gear ring. The planetary gear reduction module includes a sun gear, planet gears connected to the sun gear, a gear ring track meshing with the outside of the planet gears, and a planet carrier connected to the planet gears; The gear ring track is fixed to the housing of the motor, the output shaft of the motor is connected to the internal gear, the external gear ring is connected to the sun gear, and the planetary carrier is connected to the input end of the commutation assembly.

3. The door limiter according to claim 1, characterized in that, The reversing assembly includes a first helical gear and a second helical gear that mesh with each other. The first helical gear and the second helical gear are arranged along the height direction of the lead screw. The core of the first helical gear is connected to the output end of the reduction assembly, and the core of the second helical gear is connected to the front end of the lead screw.

4. The door limiter according to claim 1, characterized in that, It also includes a spherical bearing, the inner ring of which is fixed to the movable sleeve, and the outer ring of which is fixed to the push rod.

5. The door limiter according to claim 4, characterized in that, Also includes: The outer shell has a first receiving cavity, a second receiving cavity, and a third receiving cavity connected to one end of the first receiving cavity and the second receiving cavity; A front cover is disposed at the front end of the outer casing; Rear cover, disposed on the rear cover of the outer casing; The outer shell, the front cover, and the rear cover are fixed to the vehicle door; the motor and the reduction assembly are disposed in the first receiving cavity, the lead screw and the push rod are disposed in the second receiving cavity, and the reversing assembly is disposed in the third receiving cavity; the rear cover is provided with a through hole, the push rod passes through the through hole, and the width of the through hole is greater than the width of the push rod; the rear end of the lead screw is rotatably connected to the rear cover.

6. The door limiter according to claim 5, characterized in that, The push rod is formed with an arc along the length of the lead screw; the curvature of the arc gradually increases from both ends of the push rod to the center of the push rod.

7. The door limiter according to claim 5, characterized in that, The inner wall of the housing is provided with a slide rail, which extends along the length of the lead screw, and the push rod is slidably connected to the slide rail.

8. The door limiter according to claim 5, characterized in that, A support bearing is provided at the end of the lead screw away from the reversing assembly, and the support bearing is located inside the rear cover.

9. The door limiter according to claim 1, characterized in that, A circuit board is provided at the end of the motor opposite to the deceleration assembly; the circuit board is aligned with the motor in the radial direction; the deceleration assembly, the motor, and the circuit board are arranged sequentially along the length of the lead screw.

10. The door limiter according to claim 1, characterized in that, The push rod is located below the lead screw.

Images