Forward and reverse rotation limiting device for rolling gate

Abstract

According to the forward and reverse rotation limiting device for the rolling gate, the transmission shaft and the triggering structures of the two triggering point positions are arranged in the shell in parallel, transmission of the transmission shaft drives the triggering structures to move left and right so as to trigger the left limiting switch and the right limiting switch, and therefore the lifting stroke end point of the rolling gate is limited; the elastic reset piece is arranged between the shell and the trigger structure to assist in pushing the trigger structure to perform reverse movement reset, reset is timely and effective, extrusion and clamping stagnation are effectively prevented during reverse action of threads, and the problems that in the prior art, structural arrangement stability is poor, extrusion and clamping stagnation are prone to occurring during reverse thread action of a nut, and the service life of the nut is prolonged are solved. And the effectiveness of normal resetting and stroke limiting is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor rotation limiting, in particular to a forward and reverse rotation limiting device for a rolling shutter door. Background Art

[0002] At present, the travel limit system of the central motor of the rolling door is usually implemented mechanically, generally composed of a screw rod, a bump block and a micro switch. It is widely used due to its simple structure, reliability and relatively stable performance.

[0003] Chinese patent CN219691456U discloses a limit device for a rolling door machine, including a limit seat body, the upper surface of which is fixedly connected with a micro switch 1 and a micro switch 2, respectively, the micro switch 1 and the micro switch 2 are distributed on diagonally opposite sides, and a limit component is rotatably connected to the side plate of the limit seat body, and the limit component includes: a screw rod, which is rotatably connected to the inner side wall of the limit seat body; a limit roller, which is threadedly connected to the outer side wall of the screw rod; by setting a single limit roller, and setting adjustment components distributed on opposite sides of the single limit roller, the limit of the upper stroke and the lower stroke can be adjusted by two adjustment components.

[0004] However, the structural setting in the prior art has poor stability; when in use, the nut is easily squeezed and stuck when the reverse thread action occurs, affecting the effectiveness of normal resetting and travel limit. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies in the prior art and provide a forward and reverse limit device for a rolling shutter door. By arranging a transmission shaft and a trigger structure with two trigger points in parallel in a shell, the transmission of the transmission shaft drives the trigger structure to move left and right, thereby triggering the two limit switches on the left and right, thereby limiting the end points of the lifting and lowering stroke of the rolling shutter door, and an elastic reset member is arranged between the shell and the trigger structure to assist in pushing the trigger structure to move in the opposite direction and reset. The reset is timely and effective, and the extrusion and jamming when the thread moves in the reverse direction are effectively prevented. The technical problems existing in the prior art such as the poor stability of the structural setting and the extrusion and jamming that easily occur when the nut moves in the reverse direction, which affects the effectiveness of normal reset and stroke limit, are solved.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A forward and reverse limit device for a rolling shutter door comprises: a limit switch, which is installed in a shell; a transmission shaft, which is rotatably installed in the shell; a trigger structure, which is connected to the transmission shaft, and the rotation of the transmission shaft drives the trigger structure to move along the axial direction of the transmission shaft to trigger the limit switch; and an elastic reset member, which is abutted and arranged between the shell and the trigger structure, and assists in driving the trigger structure to reset in the reverse direction.

[0008] Preferably, the trigger structure comprises: a conducting part, which directly triggers the limit switch, and is slidably installed in the housing along the axial direction of the transmission shaft, and the elastic reset member is abuttingly arranged between the housing and the conducting part.

[0009] Preferably, the trigger structure further comprises: a trigger part, movement of which drives the conducting part to slide, and the trigger part is configured as a nut threadedly sleeved on the transmission shaft.

[0010] Preferably, the conducting portion comprises a shaft end, and the elastic reset member is coaxially sleeved on the shaft end.

[0011] Preferably, the conducting part further comprises: a working section, wherein the working section is arranged between the two shaft ends, the lower part of the working section is used to be in contact with the trigger part, and the upper part of the working section is used to be in contact with the limit switch.

[0012] Preferably, the conducting portion is distributed parallel to the transmission shaft.

[0013] Preferably, a limiting portion is further provided in the shell, and the triggering portion is circumferentially limited by the limiting portion.

[0014] Preferably, the limiting portion is configured as a rib arranged parallel to the transmission shaft, and a clamping groove is provided on the outer peripheral surface of the trigger portion, and the rib is clamped in the clamping groove.

[0015] Preferably, there are two limit switches symmetrically distributed along the axial direction of the transmission shaft, and two trigger parts are correspondingly arranged. The two trigger parts respectively drive the conductive part to move to the left to trigger the limit switch at the left end or drive the conductive part to move to the right to trigger the limit switch at the right end.

[0016] Preferably, a transmission tooth is provided at the input end of the transmission shaft, and the transmission tooth is transmission-connected to the output end of the rolling shutter door motor.

[0017] The beneficial effects of the utility model are:

[0018] (1) The utility model arranges a transmission shaft and a trigger structure at two trigger points in parallel in the housing. The transmission of the transmission shaft drives the trigger structure to move left and right, thereby triggering the left and right limit switches, thereby limiting the end point of the lifting stroke of the rolling shutter door. The structure is stable and reliable.

[0019] (2) The utility model provides an elastic reset member between the housing and the trigger structure to assist in pushing the trigger structure to move in the reverse direction and reset. The reset is timely and effective, and the thread is effectively prevented from being squeezed and stuck when the thread moves in the reverse direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the overall structure of the utility model;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 for Figure 1 Sectional view at point B. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] Embodiment 1

[0026] like Figure 1-2 As shown, a forward and reverse limit device for a rolling shutter door includes: a limit switch 1, which is installed in a shell body 2; a transmission shaft 3, which is rotatably installed in the shell body 2; a trigger structure 40, which is connected to the transmission shaft 3, and the rotation of the transmission shaft 3 drives the trigger structure 40 to move along the axial direction of the transmission shaft 3 to trigger the limit switch 1; and an elastic reset member 5, which is abutted and arranged between the shell body 2 and the trigger structure 40, and assists in driving the trigger structure 40 to reset in the reverse direction.

[0027] In this embodiment, an elastic reset member 5 is provided between the housing 2 and the trigger structure 40 to assist in pushing the trigger structure 40 to move in the reverse direction and reset. The reset is timely and effective, and the thread is effectively prevented from being squeezed and stuck when the thread moves in the reverse direction. The elastic reset member 5 is provided as a compression spring.

[0028] Preferably, the trigger structure 40 includes: a conducting part 6 , which directly triggers the limit switch 1 , which is slidably installed in the shell 2 along the axial direction of the transmission shaft 3 , and the elastic reset member 5 is abutted and arranged between the shell 2 and the conducting part 6 .

[0029] Preferably, the trigger structure 40 further includes: a trigger part 4 , the movement of the trigger part 4 drives the conducting part 6 to slide, and the trigger part 4 is configured as a nut threadedly sleeved on the transmission shaft 3 .

[0030] Preferably, the conducting portion 6 includes a shaft end 61 , and the elastic reset member 5 is coaxially sleeved on the shaft end 61 .

[0031] Preferably, the conducting portion 6 is slidably installed in the housing 2 via the shaft end 61 .

[0032] Preferably, the conducting portion 6 further includes: a working section 62 , wherein the working section 62 is arranged between the two shaft ends 61 , the lower portion of the working section 62 is used to be in contact with the trigger portion 4 , and the upper portion of the working section 62 is used to be in contact with the limit switch 1 .

[0033] Preferably, the conducting portion 6 is distributed parallel to the transmission shaft 3 .

[0034] As a preference, Figure 2-3 As shown, a limiting portion 21 is further provided in the housing 2, and the trigger portion 4 is circumferentially limited by the limiting portion 21, so that the rotation of the transmission shaft 3 drives the trigger portion 4 to move along the axial direction of the transmission shaft 3, and the transmission shaft 3 is matched with a thread.

[0035] Preferably, the limiting portion 21 is configured as a rib arranged parallel to the transmission shaft 3, and a slot is provided on the outer peripheral surface of the trigger portion 4, and the rib is clamped in the slot.

[0036] Preferably, a transmission tooth 7 is provided at the input end of the transmission shaft 3, and the transmission tooth 7 is transmission-connected to the output end of the rolling shutter door motor.

[0037] Embodiment 2

[0038] The components of this embodiment that are the same as or corresponding to those in the above embodiment are marked with the same reference numerals as those in the above embodiment. For the sake of simplicity, only the differences from the above embodiment are described below. The differences between this embodiment and the above embodiment are:

[0039] As a preference, Figure 1 As shown, there are two limit switches 1 symmetrically distributed along the axial direction of the transmission shaft 3, and two trigger parts 4 are correspondingly arranged. The two trigger parts 4 respectively drive the conductive part 6 to move to the left to trigger the limit switch 1 at the left end or drive the conductive part 6 to move to the right to trigger the limit switch 1 at the right end.

[0040] In this embodiment, by arranging the transmission shaft 3 and the trigger structure 40 at two trigger points in parallel in the shell 2, the transmission of the transmission shaft 3 drives the trigger structure 40 to move left and right, thereby triggering the left and right limit switches 1, thereby limiting the end points of the lifting and lowering stroke of the rolling shutter door, and the structure is stable and reliable.

[0041] When working:

[0042] The rolling shutter door motor rotates to drive the rolling shutter door to rise or fall. At the same time, the transmission shaft 3 rotates to drive the trigger part 4 at the left or right end to translate to the left or right end of the working section 62, thereby driving the working section 62 to trigger the limit switch 1 at the left or right end, that is, the micro switch. When the micro switch is touched, the power supply of the motor is cut off, causing the motor to stop working.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A forward and reverse limit device for a rolling shutter door, characterized in that: include: A limit switch, wherein the limit switch is installed in the housing; A transmission shaft, the transmission shaft being rotatably mounted in the housing; A trigger structure, wherein the trigger structure is connected to the transmission shaft, and the rotation of the transmission shaft drives the trigger structure to move along the axial direction of the transmission shaft to trigger the limit switch; as well as An elastic reset member is disposed between the housing and the trigger structure to assist in driving the trigger structure to reset in the reverse direction.

2. A rolling shutter door forward and reverse limit device according to claim 1, characterized in that: The trigger structure comprises: The conducting part directly triggers the limit switch and is slidably installed in the housing along the axial direction of the transmission shaft. The elastic reset member is abutted and arranged between the housing and the conducting part.

3. A rolling shutter door forward and reverse limit device according to claim 2, characterized in that: The trigger structure also includes: A trigger part, the movement of which drives the conducting part to slide, and the trigger part is configured as a nut threadedly sleeved on the transmission shaft.

4. A rolling shutter door forward and reverse limit device according to claim 3, characterized in that: The conducting portion comprises a shaft end, and the elastic reset member is coaxially sleeved on the shaft end.

5. A rolling shutter forward and reverse limiting device according to claim 4, characterized in that: The conductive portion further includes: A working section is arranged between the two shaft ends, the lower part of the working section is used to be in contact with the trigger part, and the upper part of the working section is used to be in contact with the limit switch.

6. The forward and reverse rotation limiting device for a rolling shutter door according to claim 3, characterized in that: The conducting portion is distributed in parallel with the transmission shaft.

7. The forward and reverse rotation limiting device for a rolling shutter door according to claim 3, characterized in that: A limiting portion is also provided in the shell, and the triggering portion is circumferentially limited by the limiting portion.

8. The forward and reverse rotation limiting device for a rolling shutter door according to claim 7, characterized in that: The limiting portion is configured as a rib arranged parallel to the transmission shaft, the outer peripheral surface of the trigger portion is provided with a clamping groove, and the rib is clamped in the clamping groove.

9. A rolling shutter forward and reverse limit device according to any one of claims 3 to 8, characterized in that: There are two limit switches symmetrically distributed along the axial direction of the transmission shaft, and two trigger parts are correspondingly arranged. The two trigger parts respectively drive the conductive part to move leftward to trigger the limit switch at the left end or drive the conductive part to move rightward to trigger the limit switch at the right end.

10. A rolling shutter forward and reverse limit device according to any one of claims 1 to 8, characterized in that: The input end of the transmission shaft is provided with a transmission tooth, and the transmission tooth is transmission-connected with the output end of the rolling shutter door motor.

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