A sliding door drive with power-off hold

Abstract

The utility model relates to a sliding door driver with power-off keeping, including driver casing, be equipped with the sliding door transmission structure in driver casing, the sliding door transmission structure is driven by drive arrangement, and the sliding door transmission structure includes worm wheel, and the worm wheel rotatory installation is in driver casing, and the worm wheel is connected with pulley through pulley cover, and the pulley is located the outside of driver casing, drive arrangement includes motor, and the output of motor is worm gear, the worm gear is inlaid into driver casing and is engaged with worm wheel and both can realize self -lock. The utility model does not have the clutch, simple structure, small, when the sliding door driver is not powered or power-off, even if the sliding door is on the ramp, the holding force is greater than the door's slide force, so that the door will not slide, will not produce the security hidden danger, manual also can push the sliding door, are not affected by clutch life, increased user experience and the convenience of opening and closing the door.

Description

Technical Field

[0001] This utility model belongs to the field of automotive technology and relates to a sliding door actuator with power-off retention. Background Technology

[0002] Automobiles are an important means of transportation in modern society. There are many different ways to open car doors, among which sliding doors are widely used in various commercial vehicles due to their convenience for entry and exit.

[0003] Traditional sliding door actuators, including clutches, are complex and bulky. The clutch requires continuous power to keep the sliding door on a ramp, and in this state, the door is locked and cannot be manually operated. When the sliding door is on the ramp and the clutch is de-energized, the door will not stay in place and will slide, creating a safety hazard. Summary of the Invention

[0004] The purpose of this invention is to provide a sliding door actuator with power-off retention, which can solve the above-mentioned problems and increase the user experience and the convenience of opening and closing the door.

[0005] According to the technical solution provided by this utility model: a sliding door actuator with power-off retention includes an actuator housing, a sliding door transmission structure is provided in the actuator housing, the sliding door transmission structure is driven by a drive device, the sliding door transmission structure includes a worm gear, the worm gear is rotatably installed in the actuator housing, the worm gear is connected to a pulley through a pulley sleeve, the pulley is located outside the actuator housing; the drive device includes a motor, the output end of the motor is a worm; the worm extends into the actuator housing and meshes with the worm gear, and the two can achieve self-locking.

[0006] As a further improvement of this utility model, the driver housing adopts a split structure, which is composed of a driver base and a driver cover plate, and the two are connected by screws.

[0007] As a further improvement of this utility model, the worm gear is mounted in the drive housing via a second bearing and a third bearing.

[0008] As a further improvement of this utility model, the outer periphery of the worm wheel consists of a transmission section, an upper mounting section, a tooth profile, and a lower mounting section. The second bearing and the third bearing are respectively installed in the driver base and the driver cover plate, and the second bearing and the third bearing are sleeved on the outer periphery of the upper mounting end and the lower mounting end of the worm wheel.

[0009] As a further improvement of this utility model, a rubber ring is embedded in the bottom of the driver base, and the rubber ring contacts the bottom of the second bearing.

[0010] As a further improvement of this utility model, the lower part of the pulley is provided with a pulley hole, which is sleeved on the outer circumference of the worm gear transmission section. The pulley and the worm gear are driven by a spline structure. The pulley hole is provided with an internal spline, and the worm gear transmission section is provided with an external spline. The pulley is provided with a pulley through hole, and the pulley screw passes through the pulley through hole and is threadedly connected to the pulley sleeve. The pulley sleeve has an internal thread.

[0011] As a further improvement of this utility model, the pulley is connected to one end of the transmission belt, and the other end of the transmission belt is connected to the sliding door drive shaft; a transmission groove is provided on the outer periphery of the middle part of the pulley, a pulley baffle is provided above the transmission groove, and a pulley cover plate is installed below the transmission groove.

[0012] As a further improvement of this utility model, the worm gear is fitted with a pulley sleeve through injection molding; the worm gear is provided with a connecting hole in the axial direction, the connecting hole has a stepped structure, and the pulley sleeve is provided with a positioning boss on the outer periphery, the positioning boss being embedded in the connecting hole.

[0013] As a further improvement of this utility model, the motor has a flange mounting surface, which is connected to the driver housing by a first screw.

[0014] As a further improvement of this utility model, a first bearing is installed at the front end of the worm gear, and the first bearing is located in the drive base.

[0015] The positive and progressive effects of this utility model are as follows: This invention eliminates the need for a clutch, resulting in a simple structure and small size. Even when the sliding door drive is not powered or is de-energized, and the sliding door is on a ramp, the holding force is greater than the door's downward force, preventing the door from sliding down and eliminating safety hazards. Simultaneously, the sliding door can be manually pushed, unaffected by the clutch's lifespan, thus enhancing user experience and convenience in opening and closing the door. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention.

[0017] Figure 2 This is a schematic diagram of the meshing structure of the worm and worm wheel of this utility model. Detailed Implementation

[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, terms such as "comprising" and "having" mean that in addition to those already listed in "comprising" and "having," other unlisted contents may also be included; for example, a process, method, system, product, or device may include a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0021] Due to the angle of the drawing, some parts may not be drawn, but their positions and connections can be understood from the text descriptions.

[0022] like Figure 1 As shown, this utility model is a sliding door actuator with power failure retention, including an actuator housing, in which a sliding door transmission structure is provided, and the sliding door transmission structure is driven by a drive device.

[0023] The sliding door drive structure includes a worm gear 7, which is rotatably mounted in the drive housing. The worm gear 7 is connected to the pulley 13 via a pulley sleeve 8, and the pulley 13 is located outside the drive housing.

[0024] The driver housing adopts a split structure, consisting of a driver base 3 and a driver cover 9, which are connected by screws.

[0025] The worm gear 7 is mounted in the driver housing via the second bearing 6 and the third bearing 11. Specifically, the outer periphery of the worm gear 7 consists of a transmission section, an upper mounting section, a tooth profile, and a lower mounting section. The second bearing 6 and the third bearing 11 are respectively installed in the driver base 3 and the driver cover plate 9. The second bearing 6 and the third bearing 11 are sleeved on the outer periphery of the upper mounting end and the lower mounting end of the worm gear.

[0026] To prevent the second bearing 6 from directly contacting the driver base 3, a rubber ring 5 is embedded in the bottom of the driver base 3, and the rubber ring 5 contacts the bottom of the second bearing 6.

[0027] The pulley 13 has a pulley hole at its lower part, which is fitted around the outer circumference of the worm gear 7 transmission section. The pulley 13 and the worm gear 7 are driven by a spline structure. The pulley hole has an internal spline, and the worm gear 7 transmission section has an external spline. The pulley 13 has a pulley through hole, and the pulley screw 14 passes through the pulley through hole and is threaded into the pulley sleeve 8. The pulley sleeve 8 has an internal thread, and the pulley screw 14 completes the axial positioning of the pulley 13.

[0028] The pulley 13 is connected to one end of the transmission belt, and the other end of the transmission belt is connected to the sliding door drive shaft. The outer periphery of the middle part of the pulley 13 is provided with a transmission groove, which is used to cooperate with the transmission belt. A pulley baffle 13-1 is provided above the transmission groove, and a pulley cover plate 10 is installed below the transmission groove. The pulley baffle 13-1 and the pulley cover plate 10 prevent the transmission belt from coming off the pulley 13.

[0029] The worm gear 7 is fitted with the pulley sleeve 8 via injection molding. The worm gear 7 has an axial connecting hole with a stepped structure. The pulley sleeve 8 has a positioning boss on its outer periphery, which is embedded in the connecting hole, thereby improving the connection strength between the worm gear 7 and the pulley sleeve 8.

[0030] The drive unit includes a motor 1, and the output end of the motor 1 is a worm gear 4. The motor 1 has a flange mounting surface, which is connected to the drive housing by a first screw. The worm gear 4 extends into the drive housing and meshes with a worm wheel 7. Figure 2 As shown.

[0031] To ensure the stability of the worm gear 4, a first bearing 2 is installed at the front end of the worm gear 4, and the first bearing 2 is located in the driver base 3.

[0032] The working process of this utility model is as follows: The worm gear 4 on motor 1 can drive the worm wheel 7 to rotate in both directions. The pulley 13 is fixedly connected to the worm wheel 7 by a spline pulley screw 14. Therefore, the worm wheel 7 can drive the pulley 13 to rotate in both directions, thereby causing the belt connected to the pulley to drive the sliding door to move in both directions. This, in turn, drives the sliding door drive shaft to control the opening and closing of the sliding door.

[0033] When the motor is powered off, the sliding door can be manually pushed. The belt drives the pulley 13 and worm gear 7 to move in two directions, thus enabling the manual opening and closing of the sliding door. This is not affected by the lifespan of the clutch and increases the user experience and the convenience of opening and closing the door.

[0034] When the sliding door is on the ramp and the drive suddenly loses power or stops abruptly when manually pushed, the pulley will exert a holding force. This holding force is achieved by adjusting the parameters between the worm gear and worm 7 on motor 1, setting a specific contact angle, and coordinating with the motor's cogging torque. This holding force is greater than the sliding door's downward force, thus preventing the sliding door from sliding down and eliminating any safety hazards.

[0035] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A sliding door actuator with power-off retention, comprising an actuator housing, a sliding door transmission structure disposed within the actuator housing, the sliding door transmission structure being driven by a drive device, characterized in that, The sliding door transmission structure includes a worm gear (7), which is rotatably installed in the drive housing. The worm gear (7) is connected to the pulley (13) through the pulley sleeve (8), and the pulley (13) is located outside the drive housing. The drive device includes a motor (1), and the output end of the motor (1) is a worm (4). The worm (4) extends into the drive housing and meshes with the worm gear (7), and the two can achieve self-locking.

2. The sliding door actuator with power-off retention as described in claim 1, characterized in that, The driver housing has a split structure, consisting of a driver base (3) and a driver cover (9), which are connected by screws.

3. The sliding door actuator with power-off retention as described in claim 2, characterized in that, The worm gear (7) is mounted in the drive housing via the second bearing (6) and the third bearing (11).

4. The sliding door actuator with power-off retention as described in claim 3, characterized in that, The outer periphery of the worm gear (7) consists of a transmission section, an upper mounting section, a tooth profile, and a lower mounting section. The second bearing (6) and the third bearing (11) are installed in the driver base (3) and the driver cover (9), respectively. The second bearing (6) and the third bearing (11) are sleeved on the outer periphery of the upper mounting end and the lower mounting end of the worm gear.

5. The sliding door actuator with power-off retention as described in claim 2, characterized in that, A rubber ring (5) is embedded in the bottom of the driver base (3), and the rubber ring (5) contacts the bottom of the second bearing (6).

6. The sliding door actuator with power-off retention as described in claim 1, characterized in that, The pulley (13) has a pulley hole at the bottom, which is fitted around the outer circumference of the worm gear (7) transmission section. The pulley (13) and the worm gear (7) are driven by a spline structure. The pulley hole has an internal spline, and the worm gear (7) transmission section has an external spline. The pulley (13) has a pulley through hole, and the pulley screw (14) passes through the pulley through hole and is threaded to the pulley sleeve (8). The pulley sleeve (8) has an internal thread.

7. The sliding door actuator with power-off retention as described in claim 1, characterized in that, The pulley (13) is connected to one end of the transmission belt, and the other end of the transmission belt is connected to the sliding door drive shaft; the pulley (13) has a transmission groove on the outer periphery of the middle part, a pulley baffle (13-1) is provided above the transmission groove, and a pulley cover plate (10) is installed below the transmission groove.

8. The sliding door actuator with power-off retention as described in claim 1, characterized in that, The worm gear (7) is fitted with a pulley sleeve (8) by injection molding process; the worm gear (7) has a connecting hole in the axial direction, the connecting hole is a stepped structure, and the pulley sleeve (8) has a positioning boss on its outer periphery, the positioning boss is embedded in the connecting hole.

9. The sliding door actuator with power-off retention as described in claim 1, characterized in that, The motor (1) has a flange mounting surface, which is connected to the driver housing by a first screw.

10. The sliding door actuator with power-off retention as described in claim 2, characterized in that, The first bearing (2) is installed at the front end of the worm (4), and the first bearing (2) is located in the drive base (3).

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