Electric limit stop and vehicle

Abstract

The application discloses an electric limiter and a vehicle, and the electric limiter comprises a shell, wherein the shell comprises a door mounting seat and a reduction box shell, the door mounting seat is detachably connected with the left side of the reduction box shell, the reduction box shell is internally provided with an axial mounting cavity, a reduction assembly comprises a worm gear and a positioning bearing, the worm gear and the positioning bearing are located in the axial mounting cavity, the worm gear is sleeved with the positioning bearing, and a cover is threadedly connected with the left side of the axial mounting cavity. Through detachable connection of the door mounting seat and the reduction box shell and through the threaded cover arranged on the left side of the axial mounting cavity, the electric limiter is convenient to assemble and disassemble the positioning bearing and the worm gear, and the maintainability and the maintenance efficiency of the electric limiter are effectively improved.

Description

Technical Field

[0001] This application relates to the field of automotive parts, and in particular to an electric limiter and a vehicle. Background Technology

[0002] Vehicles commonly use electric door limiters to control the opening and closing of doors. Currently, many electric door limiters on the market typically contain a reduction gear assembly consisting of a worm gear, worm, and positioning bearing to achieve high torque and self-locking transmission.

[0003] Existing electric limit switches typically employ an integrated housing design, with the internal reduction gear components encapsulated after assembly. These reduction gear components include worm gears, worm shafts, and bearings. When these components wear out or malfunction and require repair or replacement, the process is extremely inconvenient, often necessitating the complete disassembly or replacement of the entire electric limit switch – a complex and time-consuming operation. Utility Model Content

[0004] This application provides an electric limit switch and a vehicle, which aims to solve the problem of complex operation when the deceleration components of existing electric limit switches need to be repaired or replaced.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is: The first aspect of this application discloses an electric limiter, comprising: The housing includes a door mounting seat and a gearbox housing, the door mounting seat being detachably connected to the left side of the gearbox housing; the gearbox housing has an axial mounting cavity inside. A speed reduction assembly, comprising a worm gear and a positioning bearing, wherein the worm gear and the positioning bearing are located within the axial mounting cavity, and the worm gear is sleeved with the positioning bearing; A cover is provided, which is threaded to the left side of the axial mounting cavity.

[0006] In some embodiments, the worm gear has a stepped portion on the left side, and the positioning bearing is connected to the stepped portion; after assembly, the left side of the positioning bearing abuts against the cover, and the right side abuts against the shoulder of the stepped portion.

[0007] In some embodiments, the cap has a gripping portion.

[0008] In some embodiments, a notch or opening is provided at the outer peripheral edge of the cover to form the grip portion.

[0009] In some embodiments, the worm gear has an internal spline portion; the electric limiter further includes a lead screw with an external spline portion, the worm gear is mounted on the lead screw, and the internal spline portion is engaged with the external spline portion.

[0010] In some embodiments, the internal spline portion is located to the left of the worm gear; the lead screw has, from left to right, a connected protruding thread portion, the external spline portion, the optical shaft portion, and a shoulder protrusion portion. The outer diameter of the protruding thread portion is smaller than that of the external spline portion. The protruding thread portion passes through the worm gear and protrudes from the side of the worm gear near the door mounting seat. A fastening nut is threaded onto the protruding thread portion. The outer diameter of the fastening nut is larger than that of the internal spline portion. After the worm gear and the lead screw are assembled, the worm gear is located on the external spline portion and the optical shaft portion. The left side of the worm gear abuts against the fastening nut, and the right side abuts against the shoulder protrusion portion.

[0011] In some embodiments, the cover has a hollowed-out portion in the middle of the side facing the positioning bearing, and the fastening nut is located in the hollowed-out portion.

[0012] In some embodiments, the electric limiter further includes an oil seal and a lead screw bushing, wherein the lead screw, the lead screw bushing, and the oil seal are sequentially sleeved together, and the oil seal is embedded in the right side of the gearbox housing.

[0013] In some embodiments, the gearbox housing has a vertical mounting cavity that communicates with the axial mounting cavity; the reduction assembly further includes a worm gear located within the vertical mounting cavity and meshing with the worm wheel; the electric limiter further includes a drive device detachably mounted on the gearbox housing and covering the vertical mounting cavity, the drive shaft of the drive device being inserted into the worm gear.

[0014] In some embodiments, the housing further includes a guide housing located on the right side of the gearbox housing. A first fastening screw passes sequentially from the left side of the door mounting seat through the door mounting seat and the gearbox housing, and is threadedly connected to the guide housing. A second fastening screw passes from the left side of the door mounting seat through the door mounting seat and is threadedly connected to the gearbox housing.

[0015] In some embodiments, the housing further includes an end cap located on the right side of the guide housing and threadedly connected to the guide housing via a third fastening screw passing through the right side of the end cap.

[0016] A second aspect of this application discloses a vehicle including an electric limiter as described in any of the preceding embodiments.

[0017] The beneficial effects of this application are as follows: Compared with existing technologies, this application adopts a detachable connection between the door mounting base and the gearbox housing, and provides a threaded cover on the left side of the axial mounting cavity. This facilitates the installation and removal of the positioning bearing and worm gear, effectively improving the maintainability and efficiency of the electric limiter. During assembly, simply place the stepped worm gear and positioning bearing into the axial mounting cavity, and tighten the cover to seal the left side of the cavity, preventing the entry of liquids, dust, and other foreign objects. During disassembly, first separate the door mounting base from the gearbox housing, then unscrew the cover to expose the axial mounting cavity and its internal reduction components. The positioning bearing and worm gear can then be removed by hand or with tools, making the operation convenient and eliminating the need to disassemble the entire electric limiter. Furthermore, liquids, dust, and other foreign objects must pass through the door mounting base and cover to enter the axial mounting cavity from the left side. Therefore, the door mounting base and cover provide a double seal for the axial mounting cavity, resulting in excellent sealing performance and effectively improving the protection level of the electric limiter. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 These are schematic diagrams of the vehicle structure provided in some embodiments of this application; Figure 2 This is a schematic diagram of the structure of the electric limiter provided in some embodiments of this application; Figure 3 yes Figure 2 An exploded view of the electric limit switch; Figure 4 yes Figure 2 One of the schematic diagrams of the cross-sectional structure of the electric limit switch; Figure 5 yes Figure 4 An enlarged schematic diagram of the electric limit switch at region A; Figure 6 yes Figure 2 The second schematic diagram of the cross-sectional structure of the electric limit switch; Figure 7 This is an exploded view of the lead screw, fastening nut, worm gear, lead screw bushing, and oil seal in some embodiments of the electric limiter provided in this application.

[0020] Explanation of reference numerals in the attached figures: 10000 - Vehicle, 1000 - Electric limit switch, 2000 - Vehicle side door, 3000 - Vehicle body, 100 - Housing, 110 - Door mounting bracket, 120 - Gearbox housing, 121 - Axial mounting cavity, 122 - Vertical mounting cavity, 130 - Guide housing, 140 - First fastening screw, 150 - Second fastening screw, 160 - End cover, 170 - Third fastening screw, 210 - Worm gear 211-Stepped section, 212-Internal spline section, 220-Positioning bearing, 230-Worm gear, 300-Cap, 310-Holding section, 320-Hollowed section, 400-Lead screw, 410-External spline section, 420-Protruding threaded section, 430-Optical shaft section, 440-Shoulder protrusion, 500-Oil seal, 600-Lead screw bushing, 700-Drive device, 800-Fasting nut, 900-Pull rod. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, not all structures. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] In the description of this application, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0023] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] See Figure 1 This application discloses a vehicle 10000, which includes an electric limiter 1000, a vehicle side door 2000, and a vehicle body 3000. The electric limiter 1000 is installed in the interior space of the vehicle side door 2000 and connected to the vehicle body 3000, and is used to control the opening and closing of the vehicle side door 2000.

[0025] See Figures 2 to 7 The electric limit switch 1000 includes: The housing 100 includes a door mounting seat 110 and a gearbox housing 120. The door mounting seat 110 is detachably connected to the left side of the gearbox housing 120. The gearbox housing 120 has an axial mounting cavity 121 inside. The speed reduction assembly includes a worm gear 210 and a positioning bearing 220. The worm gear 210 and the positioning bearing 220 are located in the axial mounting cavity 121, and the worm gear 210 is sleeved with the positioning bearing 220. The cover 300 is threaded to the left side of the axial mounting cavity 121.

[0026] Compared with the prior art, this application adopts a detachable connection between the door mounting base 110 and the gearbox housing 120, and provides a threaded cover 300 on the left side of the axial mounting cavity 121, which facilitates the installation and removal of the positioning bearing 220 and the worm gear 210, effectively improving the maintainability and maintenance efficiency of the electric limiter 1000. During assembly, simply place the worm gear 210 with the stepped portion 211 and the positioning bearing 220 into the axial mounting cavity 121, and tighten the cover 300 to seal the left side of the axial mounting cavity 121, preventing the entry of external foreign objects such as liquids and dust. During disassembly, first separate the door mounting base 110 from the gearbox housing 120, then unscrew the cover 300 to expose the axial mounting cavity 121 and the internal reduction assembly. The positioning bearing 220 and the worm gear 210 can be removed by hand or with tools, making the operation convenient and eliminating the need to disassemble the entire electric limiter 1000. Meanwhile, external foreign objects such as liquids and dust need to pass through the door mounting seat 110 and the cover 300 to enter the axial mounting cavity 121 from the left side. Therefore, the door mounting seat 110 and the cover 300 have a double sealing effect on the axial mounting cavity 121, with good sealing performance, which effectively improves the protection level of the electric limiter 1000.

[0027] See Figure 5 and Figure 7 In this embodiment, the worm gear 210 has a stepped portion 211 on its left side, and a positioning bearing 220 is connected to the stepped portion 211. After assembly, the left side of the positioning bearing 220 abuts against the cover 300, and the right side abuts against the shoulder of the stepped portion 211. During assembly, simply place the worm gear 210 with the stepped portion 211 and the positioning bearing 220 into the axial mounting cavity 121, and tighten the cover 300 to reliably press and fix the positioning bearing 220 by utilizing its cooperation with the shoulder of the stepped portion 211.

[0028] See Figure 3In this embodiment, the cap 300 has a gripping portion 310. This provides a force application position for tightening or loosening the cap 300, making it easier to tighten or loosen the cap 300 by hand or with tools, and facilitating manual operation during assembly and maintenance.

[0029] Furthermore, a notch or opening is provided at the outer periphery of the cover 300 to form a grip 310. The structure is simple and practical, significantly enhancing the anti-slip properties and ease of force application when operating by hand or with tools, making the installation and removal of the cover 300 more labor-saving and efficient, and improving the convenience of maintenance.

[0030] In other embodiments, a rectangular protrusion is provided at the center left side of the cap to form a grip, which can be operated by hand or with a wrench, making the structure simple and practical.

[0031] See Figure 4 , Figure 5 as well as Figure 7 In this embodiment, the worm gear 210 has an internal spline portion 212; the electric limiter 1000 also includes a lead screw 400, which has an external spline portion 410. The worm gear 210 is fitted onto the lead screw 400, and the internal spline portion 212 and the external spline portion 410 are connected in a mating manner. The worm gear 210 and the lead screw 400 are connected by the mating of the internal spline portion 212 and the external spline portion 410, which improves the assembly efficiency of the electric limiter 1000. During assembly, no additional positioning tools are required. The worm gear 210 is simply fitted along the axial direction of the lead screw 400, and the precise circumferential positioning and torque transmission between the two can be quickly achieved through the tooth profile guidance of the spline. At the same time, the structural strength of the spline fit is adapted to the power transmission requirements of the worm gear 210 and the lead screw 400, which simplifies the assembly process while ensuring the stability of the transmission.

[0032] Furthermore, the inner spline portion 212 is located to the left of the worm gear 210; the lead screw 400 has, from left to right, a connected protruding thread portion 420, an outer spline portion 410, a smooth shaft portion 430, and a shoulder protrusion 440. The outer diameter of the protruding thread portion 420 is smaller than that of the outer spline portion 410. The protruding thread portion 420 passes through the worm gear 210 and protrudes from the side of the worm gear 210 near the door mounting seat 110. A fastening nut 800 is threaded onto the protruding thread portion 420. The outer diameter of the fastening nut 800 is larger than that of the inner spline portion 212. After the worm gear 210 and the lead screw 400 are assembled, the worm gear 210 is located on the outer spline portion 410 and the smooth shaft portion 430. The left side of the worm gear 210 abuts against the fastening nut 800, and the right side abuts against the shoulder protrusion 440. Specifically, the outer diameter of the protruding threaded portion 420 is smaller than that of the outer spline portion 410, so that the protruding threaded portion 420 can completely pass through the inner hole of the worm gear 210 from the right side; the radial dimension of the fastening nut 800 is larger than that of the inner spline portion 212, so as to prevent the worm gear 210 from accidentally coming out from the left side, allowing the fastening nut 800 to press the worm gear 210 from the left side, and in conjunction with the shoulder protrusion 440 on the lead screw 400 to limit the worm gear 210 from the right side, ensuring that the worm gear 210 will not move axially during the transmission process, thereby ensuring the accuracy and stability of the spline meshing transmission.

[0033] During assembly, simply insert the lead screw 400 through the right side of the worm gear 210, aligning the inner and outer splines. The worm gear 210 will then naturally slide to the shaft 430, where it will be initially positioned automatically by the right shoulder protrusion 440. Tightening the left-side fastening nut 800 completes the axial clamping. The entire process is a simple linear motion, requiring no complex alignment from the right side, making assembly easy. When maintenance or replacement of the worm gear 210 is needed, simply unscrew the cover 300, then loosen the left-side fastening nut 800. The worm gear 210, along with the positioning bearing 220, can then be easily removed axially from left to right.

[0034] Furthermore, the cover 300 has a hollowed-out portion 320 in the middle of the side facing the positioning bearing 220, and the fastening nut 800 is located in the hollowed-out portion 320. The hollowed-out portion 320 provides a receiving space for the fastening nut 800, avoiding structural interference between the fastening nut 800 and the cover 300 caused by the fastening nut 800 protruding, so that the cover 300 can be installed smoothly and fit tightly against the end face of the positioning bearing 220.

[0035] Furthermore, the electric limiter 1000 also includes an oil seal 500 and a lead screw bushing 600. The lead screw 400, lead screw bushing 600, and oil seal 500 are sequentially sleeved together, with the oil seal 500 embedded in the right side of the gearbox housing 120. The lead screw 400 is a rotating component, and the oil seal 500 is a stationary component. The lead screw bushing 600, as a wear-prone component between the lead screw 400 and the oil seal 500, effectively prevents wear between the oil seal 500 and the lead screw 400, effectively protecting the lead screw 400 and the oil seal 500. The oil seal 500 embedded in the right side of the gearbox housing 120 seals the right side of the axial mounting cavity 121, effectively preventing external foreign matter such as liquids and dust from entering from the right side of the axial mounting cavity 121, thus effectively improving the sealing performance of the axial mounting cavity 121.

[0036] Furthermore, the left side of the axial mounting cavity is double-sealed by the door mounting seat 110 and the cover 300, while the right side is sealed by the oil seal 500, effectively preventing the intrusion of external foreign objects such as liquids and dust, and providing good sealing performance.

[0037] See Figures 4 to 6 In this embodiment, the gearbox housing 120 has a vertical mounting cavity 122, which is connected to the axial mounting cavity 121. The reduction assembly also includes a worm gear 230, which is located in the vertical mounting cavity 122 and meshes with the worm wheel 210. The electric limiter 1000 also includes a drive device 700, which is detachably mounted on the gearbox housing 120 and closes the vertical mounting cavity 122. The drive shaft of the drive device 700 is inserted into the worm gear 230. The drive shaft of the drive device 700 drives the worm gear 230 to rotate, which in turn drives the worm wheel 210 and the lead screw 400 to rotate, thereby causing the pull rod 900 to reciprocate and realize the automatic opening and closing of the vehicle side door 2000. The drive unit 700 itself serves as a cover for the vertical mounting cavity 122, effectively sealing it off. This design is simple and practical. When it is necessary to disassemble the worm gear 230, since the drive shaft of the drive unit 700 is connected to the worm gear 230, the drive unit 700 can be removed from the gearbox housing 120 to expose the vertical mounting cavity 122. This makes the operation convenient.

[0038] It should be noted that, since the drive shaft of the drive device 700 is inserted into the worm 230, positioning bearings 220 need to be set at both the upper and lower ends of the worm 230 to fix the position of the worm 230.

[0039] In this application, the worm gear 210 and the worm 230 can be disassembled and replaced separately, and the worm 230 will not be displaced when the worm gear 210 is disassembled separately; similarly, the worm gear 210 will not be displaced when the worm 230 is disassembled separately, which facilitates maintenance work.

[0040] Furthermore, the drive unit 700 can be detachably connected to the gearbox housing 120 by means of fastening screws or snap-fitting.

[0041] See Figures 2 to 4 In this embodiment, the outer casing 100 further includes a guide housing 130, which is located on the right side of the gearbox housing 120. A first fastening screw 140 passes sequentially from the left side of the door mounting seat 110 through the door mounting seat 110 and the gearbox housing 120, and is threadedly connected to the guide housing 130. A second fastening screw 150 passes from the left side of the door mounting seat 110 through the door mounting seat 110 and is threadedly connected to the gearbox housing 120. By unifying the screw assembly direction on the left side, a reliable connection between the door mounting seat 110, the gearbox housing 120, and the guide housing 130 is achieved, which not only enhances the overall structural integrity but also significantly improves assembly efficiency and the convenience of maintenance operations.

[0042] It should be noted that, in addition to being detachably connected by fastening screws, the door mounting bracket 110, the gearbox housing 120, and the guide housing 130 can also be detachably connected by snap-fitting.

[0043] See Figures 2 to 4 In this embodiment, the outer casing 100 also includes an end cap 160, which is located on the right side of the guide housing 130. The end cap 160 is threadedly connected to the guide housing 130 through the right side of the end cap 160 by a third fastening screw 170. By connecting the end cap 160 and the guide housing 130 from the right side with the third fastening screw 170, the right end of the outer casing 100 is closed and fixed.

[0044] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.

Claims

1. An electric limit switch, characterized in that, include: The housing includes a door mounting seat and a gearbox housing, the door mounting seat being detachably connected to the left side of the gearbox housing; the gearbox housing has an axial mounting cavity inside. A speed reduction assembly, comprising a worm gear and a positioning bearing, wherein the worm gear and the positioning bearing are located within the axial mounting cavity, and the worm gear is sleeved with the positioning bearing; A cover is provided, which is threaded to the left side of the axial mounting cavity.

2. The electric limit switch according to claim 1, characterized in that: The worm gear has a stepped portion on its left side, and the positioning bearing is connected to the stepped portion; After assembly, the left side of the positioning bearing abuts against the cover, and the right side abuts against the shoulder of the stepped portion.

3. The electric limit switch according to claim 1, characterized in that: The cap has a gripping part.

4. The electric limit switch according to claim 3, characterized in that: The outer periphery of the cover has a notch or opening to form the grip portion.

5. The electric limit switch according to claim 1, characterized in that: The worm gear has an internal spline portion; The electric limiter also includes a lead screw with an external spline portion, a worm gear mounted on the lead screw, and an internal spline portion that engages with the external spline portion.

6. The electric limit switch according to claim 5, characterized in that: The internal spline portion is located on the left side of the worm gear; The lead screw has, from left to right, a connected protruding threaded portion, an external spline portion, a smooth shaft portion, and a shoulder protrusion portion. The outer diameter of the protruding threaded portion is smaller than that of the external spline portion. The protruding threaded portion passes through the worm gear and protrudes from the side of the worm gear near the door mounting seat. A fastening nut is threaded onto the protruding threaded portion. The outer diameter of the fastening nut is larger than that of the internal spline portion. After the worm gear and the lead screw are assembled, the worm gear is located on the external spline and the optical shaft. The left side of the worm gear abuts against the fastening nut, and the right side abuts against the shoulder protrusion.

7. The electric limit switch according to claim 6, characterized in that: The cover has a hollowed-out portion in the middle of the side facing the positioning bearing, and the fastening nut is located in the hollowed-out portion.

8. The electric limit switch according to claim 5, characterized in that: The electric limiter also includes an oil seal and a lead screw bushing, with the lead screw, the lead screw bushing, and the oil seal sequentially connected, and the oil seal being embedded in the right side of the gearbox housing.

9. The electric limit switch according to claim 1, characterized in that: The gearbox housing has a vertical mounting cavity, which is connected to the axial mounting cavity; The deceleration assembly also includes a worm gear, which is located in the vertical mounting cavity and meshes with the worm wheel; The electric limiter also includes a drive device, which is detachably mounted on the gearbox housing and seals the vertical mounting cavity. The drive shaft of the drive device is inserted into the worm gear.

10. The electric limit switch according to claim 1, characterized in that: The housing also includes a guide housing, which is located on the right side of the gearbox housing. A first fastening screw passes sequentially from the left side of the door mounting seat through the door mounting seat and the gearbox housing, and is threadedly connected to the guide housing. The second fastening screw passes through the left side of the door mounting bracket and is threaded into the gearbox housing.

11. The electric limiter according to claim 10, characterized in that: The housing also includes an end cap located on the right side of the guide housing, which is threadedly connected to the guide housing by a third fastening screw passing through the right side of the end cap.

12. A vehicle, characterized in that, Including the electric limiter as described in any one of claims 1 to 11.

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