A stopper for a roller shutter motor

Abstract

The utility model relates to rolling shutter door control technical field discloses a kind of limit stop for rolling shutter door motor, including limiting component and adjusting component.Limiting component is equipped with screw rod two and slider two of screw connection on it with motor transmission mechanism linkage.Limiting component is equipped with integrally rotatable knob and worm, worm wheel meshed with worm, screw rod one and slider one of screw connection on it with coaxial connection of worm wheel.When fixing travel switch on slider one, when adjusting, rotating knob is driven by worm worm wheel high reduction ratio transmission to make screw rod one accurate rotation, to drive slider one and travel switch whole linear fine adjustment to set limit point.The utility model separates limit point setting and position feedback by the adjusting component, effectively solve the problem of tedious adjustment operation, poor positioning accuracy of prior art, with the beneficial effects of convenient and labor-saving adjustment, accurate and stable positioning, reliable structure, good self-locking and vibration resistance.

Description

Technical Field

[0001] This utility model relates to the field of roller shutter door control technology, and in particular to a limit switch for a roller shutter door motor. Background Technology

[0002] Roller shutters, widely used in shops, garages, and warehouses, are typically driven by a motor. To ensure that the roller shutter can accurately stop at the fully open or fully closed position and to prevent motor overload or damage to the door, limit switches are usually installed in its drive system.

[0003] In existing technology, a common limit switch for roller shutter motors mainly adopts a mechanical structure. Its working principle is usually as follows: a gear linked to the motor transmission mechanism drives a lead screw to rotate, and a slider on the lead screw moves axially accordingly. When the slider moves to a predetermined position, it triggers a fixed limit switch, thereby cutting off the motor control circuit and realizing the limit.

[0004] However, in this structure, the installation position of the limit switch is usually relatively fixed. When it is necessary to adjust the upper or lower limit of the roller shutter, the operator often needs to open the housing of the limit switch, manually loosen the fixing screw of the limit switch, move it to the new position, and then tighten it again. This adjustment process has obvious shortcomings. First, the accuracy of manual adjustment is difficult to guarantee, and minute movements are difficult to control, often requiring repeated attempts to achieve the ideal limit effect, resulting in a cumbersome and time-consuming debugging process. Second, due to the limited adjustment space and inconvenient operation, the adjustment efficiency is low, especially in situations requiring fine-tuning. In addition, some limit switches that are only fastened with simple screws may experience slight shifts in their set position under the vibration environment of the roller shutter motor during long-term operation, affecting the long-term reliability of the limit control. Therefore, this utility model proposes a limit switch for roller shutter motors to solve the shortcomings of the prior art. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a limit switch for a roller shutter motor, aiming to improve the problems of cumbersome adjustment process, time-consuming adjustment, and difficulty in guaranteeing adjustment accuracy in the existing limit switches for roller shutter motors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A limit switch for a roller shutter motor includes: a housing, a dust cover, and a limit assembly. The limit assembly includes a gear connected to the transmission mechanism of the roller shutter motor, a lead screw driven by the gear, a slider threadedly connected to the lead screw, and a limit switch disposed on the movement path of the slider. It also includes an adjustment assembly, which includes a lead screw and a slider threadedly connected to the lead screw.

[0007] The limit switch is fixedly mounted on the slider.

[0008] Preferably, the limit switch for the roller shutter motor further includes a fastening assembly for fixing the dust cover to the outer casing. The fastening assembly includes a knob, a screw connected to the knob, and a threaded seat on the outer casing that is threadedly engaged with the screw.

[0009] Preferably, the adjustment assembly further includes a second knob and a worm gear connected to the second knob.

[0010] Preferably, the adjusting assembly further includes a worm gear that meshes with the worm.

[0011] Preferably, the worm gear and the lead screw are coaxially connected.

[0012] Preferably, the gear is connected to the lead screw in a transmission connection.

[0013] Preferably, the slider two is positioned so that it can touch the limit switch.

[0014] Preferably, the limit switch is provided with a spring contact, and the slider touches the spring contact.

[0015] This utility model has the following beneficial effects: 1. In this utility model, by adding an adjustment component consisting of a worm, a worm wheel, and a lead screw, the slider with a fixed limit switch is driven by the adjustment component to move linearly, which solves the problem of inconvenient adjustment and low precision of the roller shutter limit switch in the prior art, and achieves the technical effect of being able to make precise and stable fine adjustments to the limit point.

[0016] 2. In this invention, when adjusting the limit point, the worm gear is driven by rotating an external adjustment knob. The worm gear drives the worm wheel through meshing transmission, which in turn causes the lead screw to rotate. Finally, the position of the limit switch is precisely linearly shifted through the threaded transmission. This design utilizes the high reduction ratio and self-locking characteristics of the worm gear transmission, making the adjustment process precise and labor-saving. After adjustment, the position is stable and will not shift due to equipment vibration.

[0017] 3. In this utility model, during automatic limit operation, the gear linked to the motor transmission mechanism drives the lead screw to rotate synchronously, causing the slider two, which represents the real-time position of the roller shutter door, to move axially. When the slider two moves to the position preset by the adjustment component, it will touch the limit switch, thereby sending a signal to stop the motor. This achieves separation of position feedback and position setting, ensuring the accuracy and reliability of limit control. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of a limit switch for a roller shutter motor proposed in this utility model; Figure 2 This is an exploded view of the structure of a limit switch for a roller shutter motor proposed in this utility model; Figure 3 This is a schematic diagram of the limiting component of a limit switch for a roller shutter motor according to the present invention; Figure 4 This is a schematic diagram of the adjustment assembly of a limit switch for a roller shutter motor proposed in this utility model.

[0019] Legend: 1. Outer casing; 2. Dust cover; 3. Fastening assembly; 301. Knob 1; 302. Screw; 303. Threaded seat; 4. Adjustment assembly; 401. Knob 2; 402. Worm gear; 403. Worm wheel; 404. Lead screw 1; 405. Slider 1; 5. Limit assembly; 501. Gear; 502. Lead screw 2; 503. Slider 2; 504. Limit switch; 505. Spring contact. Detailed Implementation

[0020] 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 protection scope of the present utility model.

[0021] Reference Figures 1-4 This utility model provides a limit switch for a roller shutter motor, which aims to solve the problems of inconvenient adjustment and low accuracy of existing roller shutter limit switches.

[0022] The limit switch for the roller shutter motor includes a housing 1, a dust cover 2, and a limit component 5 disposed inside the housing 1. The limit component 5 includes a gear 501, which is connected to the transmission mechanism of the roller shutter motor. The limit component 5 also includes a lead screw 502, which is connected to the gear 501. A slider 503 is threadedly connected to the lead screw 502. A limit switch 504 is disposed on the movement path of the slider 503. The limit switch for the roller shutter motor in this embodiment also includes an adjustment component 4. The adjustment component 4 includes a lead screw 404 and a slider 405 threadedly connected to the lead screw 404. The limit switch 504 is fixedly connected to the slider 405. The position of the limit switch 504 can be adjusted by the adjustment component 4.

[0023] The structure of each component and their connection relationships are described in detail below: The adjustment assembly 4 also includes a second knob 401 and a worm gear 402. The second knob 401 is located outside the outer casing 1. One end of the worm gear 402 is fixedly connected to the second knob 401. The worm gear 402 can rotate around its own axis and is connected to the outer casing 1. The adjustment assembly 4 also includes a worm wheel 403, which meshes with the worm gear 402. The worm wheel 403 is coaxially fixedly connected to the lead screw 404. When the second knob 401 is rotated, the second knob 401 drives the worm gear 402 to rotate. The worm gear 402 drives the worm wheel 403 to rotate through meshing transmission. The worm wheel 403 then drives the lead screw 404 to rotate. Since the lead screw 404 and the slider 405 are threadedly connected, the rotation of the lead screw 404 will drive the slider 405 to slide along the axial direction of the lead screw 404, thereby realizing the position adjustment of the limit switch 504 fixed on the slider 405.

[0024] The limit switch for the roller shutter motor also includes a fastening assembly 3 for detachably fixing the dust cover 2 to the outer casing 1. The fastening assembly 3 includes a knob 301, a screw 302 and a threaded seat 303. The threaded seat 303 is fixedly mounted on the outer casing 1. One end of the screw 302 is fixedly connected to the knob 301. The screw 302 passes through the dust cover 2 and is threadedly connected to the threaded seat 303.

[0025] The limit switch 504 is provided with a spring contact 505. The slider 503 is positioned so that when it moves axially along the lead screw 502, its end can touch the spring contact 505. The limit switch 504 is triggered by squeezing the spring contact 505.

[0026] In a preferred embodiment, gear 501 and lead screw 502 are coaxially arranged and fixedly connected to ensure that the transmission between them is delayed and stable and reliable.

[0027] Specifically, the lead screw 2 502 is threadedly connected to two sliders 2 503. The threads of the two sliders 2 503 are opposite, so that when the lead screw 2 502 rotates in one direction, the two sliders 2 503 move closer to each other or further away from each other, respectively for the upper limit and lower limit of the roller shutter door.

[0028] Accordingly, two limit switches 504 are provided, each of which is fixedly connected to its corresponding slider 405. The two limit switches 504 are located on the movement paths of the two sliders 503 respectively, and are used to detect the upper limit and lower limit respectively.

[0029] To ensure connection stability, limit switch 504 is fixed to slider 405 with fasteners. The threaded fit between slider 405 and lead screw 404 has a small clearance, and the meshing between worm gear 403 and worm 402 is tight to ensure adjustment accuracy and vibration resistance.

[0030] To improve durability, gear 501, worm 402, worm wheel 403, lead screw 1 404, slider 1 405, lead screw 2 502, and slider 2 503 are preferably made of wear-resistant metal materials or high-strength engineering plastics.

[0031] Working Principle: When the limit switch for the roller shutter motor of this utility model is working, the limit position is first set. When adjustment is needed, turn knob 301 to unscrew the screw 302 from the threaded seat 303 so that the dust cover 2 can be opened. Then, according to the upper or lower limit position to be set for the roller shutter, turn the corresponding knob 401. Knob 401 drives the worm gear 402 to rotate. The worm gear 402 drives the worm wheel 403 to rotate through meshing transmission. The worm wheel 403 then drives the lead screw 404 to rotate. The lead screw 404 drives the slider 405, which is fixed with the limit switch 504, to move linearly through thread transmission, thereby realizing precise adjustment of the physical position of the limit switch 504.

[0032] Once the upper and lower limit positions are set, the roller shutter motor is started to raise the roller shutter. The motor drives gear 501 to rotate via the transmission mechanism. Gear 501 then drives lead screw 502 to rotate. The rotation of lead screw 502 drives one of the sliders 503 to move towards the limit switch 504 corresponding to the upper limit position via threaded transmission. When the roller shutter rises to the preset upper limit position, slider 503 moves to the predetermined position and touches the spring contact 505 on the limit switch 504. After the spring contact 505 is pressed, it triggers the limit switch 504, which then sends an electrical signal. The signal is transmitted to the roller shutter motor controller, causing the motor to stop rotating and the roller shutter to stop at the upper limit position. Similarly, when the roller shutter motor rotates in the reverse direction to drive the roller shutter to descend, gear 501 drives the lead screw 502 to rotate in the reverse direction, and another slider 503 moves towards the limit switch 504 corresponding to the lower limit position. When the roller shutter descends to the preset lower limit position, the slider 503 touches the spring contact 505 of the corresponding limit switch 504, thereby stopping the motor and stopping the roller shutter at the lower limit position. Through the cooperation of the limit component 5 and the adjustment component 4, the problems of inconvenient and low-precision limit adjustment are solved.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A limit switch for a roller shutter motor, comprising: Outer shell (1); Dust cover (2); The limiting component (5) includes a gear (501) connected to the motor transmission mechanism of the rolling shutter door, a lead screw (502) driven by the gear (501), a slider (503) threadedly connected to the lead screw (502), and a limit switch (504) set on the movement path of the slider (503). Its features are, It also includes an adjustment assembly (4), which includes a lead screw (404) and a slider (405) threadedly connected to the lead screw (404). The limit switch (504) is fixedly mounted on the slider (405).

2. The limit switch for a roller shutter motor according to claim 1, characterized in that: It also includes a fastening assembly (3) for fixing the dust cover (2) to the outer casing (1), the fastening assembly (3) including a knob (301), a screw (302) connected to the knob (301), and a threaded seat (303) provided on the outer casing (1) and threadedly engaged with the screw (302).

3. A limit switch for a roller shutter motor according to claim 1, characterized in that: The adjustment assembly (4) also includes a second knob (401) and a worm gear (402) connected to the second knob (401).

4. A limit switch for a roller shutter motor according to claim 3, characterized in that: The adjustment assembly (4) also includes a worm wheel (403) that meshes with the worm (402).

5. A limit switch for a roller shutter motor according to claim 4, characterized in that: The worm gear (403) is coaxially connected to the lead screw (404).

6. A limit switch for a roller shutter motor according to claim 1, characterized in that: The gear (501) is connected to the lead screw (502) for transmission.

7. A limit switch for a roller shutter motor according to claim 1, characterized in that: The slider 2 (503) is positioned so that it can touch the limit switch (504).

8. A limit switch for a roller shutter motor according to claim 7, characterized in that: The limit switch (504) is provided with a spring contact (505), and the slider (503) touches the spring contact (505).

Images