Actuation unit for actuating a rolling closing wall
By designing an actuation unit that incorporates sensors, the problems of inconvenient assembly and insufficient safety of existing actuation units are solved, enabling convenient assembly and timely fault detection in a small space, thereby improving safety and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MASINARA SPA
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-07
AI Technical Summary
Existing actuation units are inadequate in terms of ease of assembly and maintenance, as well as safety. In particular, actuation units for roller blinds or venetian blinds need to be more practical and suitable for small spaces, and need to be able to promptly notify of any problems such as spring breakage.
An actuation unit comprising a tubular body, a motor, a support body, a parachute device, a torsion spring, and first and second sensors is designed. By detecting the state of the torsion spring and the actuation of the centrifugal brake through the sensors, the motor is controlled and an alarm signal is released, ensuring safety and convenient maintenance.
It enables convenient assembly and maintenance in a small space, and can detect and respond to problems such as spring breakage in a timely manner, thus improving safety and reliability.
Smart Images
Figure CN224469065U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an actuation unit for actuating a rolling closing wall. Background Technology
[0002] In enclosed spaces or environments such as garages, shops, and rooms, there are various types of enclosing walls, including roller shutters and motor-driven louvers.
[0003] The actuation units of existing roller blinds or venetian blinds have some drawbacks in terms of ease of assembly and maintenance, as well as safety.
[0004] Generally, the actuation unit includes a motor that allows the rolling wall to move, a torsion spring, and a safety device, which may be, for example, a parachute type.
[0005] The torsion spring is automatically loaded during the lowering step of the closing wall, absorbing elastic energy and reducing the power required from the motor (or from the user in the case of manual movement) during the rising step of the wall, thereby balancing the weight of the wall.
[0006] Typically, the parachute assembly is located outside the other components of the unit and interacts with the torsion spring.
[0007] There is a need to manufacture an actuation unit that is particularly practical to assemble and also suitable for small spaces.
[0008] It is also necessary to signal any problems with the actuator, such as a broken spring. Utility Model Content
[0009] The purpose of this invention is to provide a unit for actuating a rolling closing wall that meets the above-mentioned requirements.
[0010] The specified technical objective is essentially achieved by a unit for actuating a closing wall, comprising one or more technical features described in this utility model.
[0011] This utility model describes an actuation unit for actuating a rolling closing wall, comprising: a tubular body having a main extension direction and a first end and a second end; a motor configured to rotate the tubular body; a support body having a housing; a parachute device housed in the housing of the support body and including a centrifugal brake operably coupled to the tubular body in use, the parachute device being configured to operate and prevent rotation of the tubular body when a predetermined rotational speed is exceeded; at least one torsion spring having a first end coupled to the motor for rotation; and a first sensor configured to detect a signal relating to the state of the torsion spring.
[0012] The first sensor is associated with the support body.
[0013] The actuation unit includes a second sensor located in the support body and configured to detect actuation of the centrifugal brake.
[0014] The actuation unit includes: an activation body rotatable relative to the support body portion; and wherein: the torsion spring further has a second end opposite to the first end, the second end being operably connected directly or indirectly to the activation body; the first sensor is configured to switch due to the rotation of the activation body.
[0015] The activation body is configured to rotate at an angle of less than 45° relative to the support body.
[0016] The activation body includes a receiving seat, and the second end is fixed to the activation body and inserted into the receiving seat.
[0017] The activation body has a disc shape.
[0018] The actuation unit includes a fixing body for fixing the torsion spring, the second end of the torsion spring being fixed to the fixing body, and wherein the activation body is coupled to the fixing body.
[0019] One of the activating body and the supporting body includes a limiting recess, and the other of the supporting body and the activating body includes a protrusion configured to be inserted into the limiting recess; the limiting recess and the protrusion are configured as a constraint means to limit partial rotation of the activating body relative to the supporting body.
[0020] The activation body has an activation protrusion or activation recess, which is configured to engage with the first sensor when the activation body is at a predetermined angular position relative to the support body.
[0021] The actuation unit includes an additional spring operatively coupled to the activation body and the support body.
[0022] The support body includes a seat for accommodating the additional spring, and one end of the additional spring is coupled to the activation body.
[0023] The spring is a linear spring.
[0024] The actuation unit includes a second sensor located in the support body, the second sensor being configured to detect actuation of the centrifugal brake due to a descent speed exceeding a predetermined value relative to the closing wall.
[0025] The actuation unit includes a control unit connected to the first sensor and configured to release an alarm signal based on the state of a signal received from the first sensor.
[0026] The actuation unit includes a signal unit that communicates with the control unit, the signal unit being configured to supply signals related to the first sensor and / or the second sensor.
[0027] The motor includes a rotor connected to the tubular body.
[0028] The support body includes a stop portion designed to contact the parachute device when the centrifugal brake is actuated.
[0029] The centrifugal brake includes a disc-shaped body.
[0030] The disc-shaped body has a recessed portion.
[0031] When the centrifugal brake is not actuated, the second sensor contacts the recessed portion.
[0032] The disc-shaped body comprises a first part and a second part.
[0033] The disc-shaped body includes a first edge extending around at least a first portion.
[0034] The support body has a first contact portion that is configured to potentially contact the first edge during actuation of the centrifugal brake.
[0035] The disc-shaped body includes a second edge extending around at least the second portion.
[0036] The support body has a second contact portion configured to contact the second edge.
[0037] The centrifugal brake includes a gear that is received inside the disc-shaped body and has multiple slots and a central hole.
[0038] The centrifugal brake includes a plurality of movable blocking elements, each of which is housed in each slot of the gear.
[0039] The plurality of movable blocking elements include spherical or cylindrical elements.
[0040] The parachute device is configured to rotate relative to the support body in a first rotational direction after the actuation of the centrifugal brake.
[0041] The tubular body has an octagonal cross-section.
[0042] The tubular body has a cylindrical cross-section.
[0043] The first sensor is configured to generate a first signal accordingly after the torsion spring breaks.
[0044] The first sensor is limited by a switch.
[0045] The second sensor is limited by a switch. Attached Figure Description
[0046] The description is illustrated below with reference to the accompanying drawings, which are provided for illustrative and therefore non-limiting purposes only, in which:
[0047] - Figure 1 This is a perspective view of the first embodiment of the actuation unit for the closing wall according to the present invention.
[0048] - Figure 2 yes Figure 1 Exploded view of the actuation unit.
[0049] - Figure 3 yes Figure 1 The cross-section of the actuator unit,
[0050] - Figure 4 This is a perspective view showing details of a unit for actuating a closing wall according to a first embodiment of the present invention.
[0051] - Figure 5 This is a perspective view showing details of the unit for actuating the closing wall according to the first embodiment.
[0052] - Figure 6 and Figure 7 This is when the activation disk is in two different locations. Figure 5 The corresponding 3D diagram of the details;
[0053] - Figure 8 This is a perspective view showing details of a unit for actuating a closing wall according to a first embodiment of the present invention.
[0054] - Figure 9 It is after disassembly Figure 8 A detailed 3D view, showing one of the parts removed;
[0055] - Figure 10 It is after disassembly Figure 8 A detailed 3D image;
[0056] - Figure 11 and Figure 12These are, respectively, a perspective view and an exploded perspective view of a partially assembled parachute device for an actuating closing wall according to the present invention;
[0057] - Figure 13 This is a perspective view of a second embodiment of the actuation unit for the closing wall according to the present invention.
[0058] - Figure 14 yes Figure 13 Exploded view of the actuation unit.
[0059] - Figure 15 and Figure 16 This is a perspective view showing details of the unit for actuating the closing wall according to the second embodiment of the present invention in two different configurations.
[0060] - Figure 17 and Figure 18 They are shown respectively Figure 15 and Figure 16 A magnified view of some details. Detailed Implementation
[0061] This utility model relates to a unit 1 for actuating a rolling closing wall.
[0062] According to this utility model, the unit for actuating the rolling closing wall includes:
[0063] - A tubular body 2 having a main extending direction D and a first end 2A and a second end 2B;
[0064] - Motor 3, which is configured to rotate the tubular body 2.
[0065] - Support body 4, which has a first receiving seat 40,
[0066] - A parachute device 5, housed in a seat 40 of the support body 4, and including a centrifugal brake 50 operably coupled (directly or indirectly) to the tubular body 2, the parachute device 5 being configured to operate and prevent rotation of the tubular body 2 when a predetermined rotational speed is exceeded.
[0067] - At least one torsion spring 7 having a third end 7A operably (preferably indirectly) coupled to the motor 3 for rotation;
[0068] - A first sensor 9 (preferably a switch) is designed to detect signals related to the state of the torsion spring 7 (preferably failure and / or unloading).
[0069] According to another aspect, the first sensor 9 is associated with the support body 4, and is specifically fixed to the support body 4.
[0070] It should be noted that, preferably, the actuation unit includes a second sensor 8, which is located in the support body 4 and configured to detect the actuation of the centrifugal brake 50.
[0071] The first and second embodiments shown share the concept of the fundamental present invention; the actual differences between these embodiments will be described in more detail below.
[0072] According to one aspect of this specification, the actuation unit includes an activation body 20 that is rotatable relative to a support body 4.
[0073] Moreover, preferably, the torsion spring 7 has a third end 7A that is operably (directly or indirectly) connected to the motor 3 for rotation, and a fourth end 7B that is operably directly or indirectly connected to the activation body 20.
[0074] The term "indirect connection" refers to the connection between one element and another element through another element, while the term "direct connection" refers to the connection between one element and another element without another element.
[0075] It should be noted that, without mentioning whether the connection is direct or indirect, it can be understood that, according to alternative implementations, the connection can be in two ways.
[0076] It should be noted that the first sensor 9 is configured to switch (i.e., change the logic state) due to the rotation of the activation disk 20 between the first angular position and the second angular position.
[0077] It should be noted that the description of the activation disk 20 as "partially rotatable" must be understood as the activation body 20 not performing a full rotation (i.e., 360°) relative to the support body 4, but rather performing a rotation at a predetermined angle (less than 360°).
[0078] This aspect will be described in more detail below.
[0079] According to another aspect, the activating body 20 is configured to rotate at an angle of less than 45° (preferably less than 15°) relative to the supporting body 4.
[0080] In order to allow "partial rotation" of the activating body 20 relative to the supporting body 4, one of the activating body 20 and the supporting body 4 includes a limiting recess 23A, and the other of the supporting body 4 and the activating body 20 includes a protrusion 23B configured to be inserted into the recess 23A; the limiting recess 23A and the protrusion 23B are configured as a constraint device to limit the partial rotation of the activating body 20 relative to the supporting body 4.
[0081] The use of this portion of the rotation relative to the signal from the first sensor 9 is described in more detail below.
[0082] According to the second embodiment, the activation body 20 includes a second receiving seat 21.
[0083] The fourth end 7B of the spring 7 is fixed to the activation body 20 and inserted into the receiving cavity 21.
[0084] According to the first embodiment, the activation body 20 has a disc shape.
[0085] Furthermore, in this first embodiment, the actuation unit includes a fixing body 22 for fixing the spring 7, and the fourth end 7B of the spring 7 is directly fixed to the fixing body 22; according to this first embodiment, the activation body 20 is coupled (i.e., fixed) to the fixing body 22.
[0086] According to another aspect, the activation body 20 has an activation protrusion 24A or an activation recess (in) Figure 10 and Figure 17 As can be seen in the image, the activation protrusion 24A or activation recess is configured to engage with the first sensor 9 (more precisely, with the activation element of the first switch 9) when the activation body 20 is in a predetermined angular position relative to the support body 4.
[0087] In fact, the arrangement of the activation body 20 at a predetermined angular position determines the switching of the state of the first sensor 9 (i.e., switch 9).
[0088] The following will explain this function in more detail with reference to the specific advantages of the utility model.
[0089] According to one aspect, the actuation unit includes an additional spring 25, which is operatively coupled to the activation element 20 and the support element 4.
[0090] The additional spring 25 acts as an insert between the activating body 20 and the supporting body 4. The function of the additional spring 25 is described in more detail below.
[0091] According to another aspect, the support body 4 includes a seat 26 for accommodating the additional spring 25, and one end of the additional spring 25 is coupled to the activation body 20.
[0092] Preferably, the spring 25 is a linear spring.
[0093] The spring 25 is compressed between the first corner position of the activating body 20 (corresponding to the position where the spring 7 is unloaded or broken) and the second corner position of the activating body 20 (corresponding to the position where the spring 7 is loaded).
[0094] According to another aspect, the actuation unit includes a second sensor 8 (preferably a switch) located in the support body 4 and configured to detect actuation of the centrifugal brake 50 due to an excess of the rotational angular velocity of the tubular body 2, which corresponds to an excessively rapid descent speed of the closing wall relative to a predetermined value.
[0095] This condition corresponds to the case of spring 7 breaking, because a failure occurred in the motor and / or brake (or other mechanical components inherent in the motion chain motor-closing wall), which thus determines the sudden acceleration of the closing wall (descent).
[0096] According to another aspect, the actuation unit includes a control unit connected to the first sensor 9 and / or the second sensor 8, and configured to release an alarm signal based on the state of the signal received from the first sensor 9 and / or the second sensor 8.
[0097] According to another aspect, the actuation unit includes a signal unit that communicates with the control unit and is configured to supply signals related to the first sensor 9 and / or the second sensor 8.
[0098] Preferably, the first sensor 9 is defined by a switch.
[0099] Furthermore, preferably, the second sensor 8 is defined by a switch.
[0100] According to one aspect, the first switch 9 and the second switch 8 respectively have a first active contact 9A and a second active contact 8A.
[0101] Other aspects related to the actuation unit are described below.
[0102] The supporting body 4 has a supporting part with a seat 40 positioned therein.
[0103] The support portion preferably has a quadrilateral shape and a receiving seat 40.
[0104] The seat 40 is preferably defined by a hole that accommodates the parachute device 5.
[0105] The support portion is preferably fixed to the frame (not shown) of the rolling closure wall during use.
[0106] The centrifugal brake 50 includes a first rotor portion 50A, which is mechanically coupled to the motor 3 in use (preferably indirectly, that is, by means of other elements).
[0107] Therefore, when motor 3 is actuated, the first part 50A rotates.
[0108] The parachute device 5 is configured to prevent the rotation of the tubular body 2 under predetermined conditions (exceeding a predetermined rotational speed of the tubular body 2, which corresponds to an excessively rapid descent speed of the closing wall) so as to substantially stop the descent of the roller shutter.
[0109] The parachute device 5 is positioned at the end 2B of the tubular body 2.
[0110] According to the first embodiment, the actuation unit 1 further includes a shaft 6 located inside the tubular body 2, the shaft 6 having an end 6A that is mechanically coupled (more precisely, rotationally restricted) to the inner surface 2C of the tubular body 2, and another end 6B that is coupled to the parachute device 5 (more specifically, to the first rotor portion 50A of the centrifugal brake 50).
[0111] Therefore, according to the first embodiment, shaft 6 allows the motion of motor 3 to be transmitted to the first rotor portion 50A of centrifugal brake 50.
[0112] According to the first embodiment, the torsion spring 7 is positioned inside the tubular body 2.
[0113] According to the first embodiment, the torsion spring 7 is positioned to wind around the shaft 6.
[0114] It should be noted that, according to the first embodiment, due to mechanical coupling, the torsion spring 7, the parachute device 5, and the shaft 6 define a single component (unit) 100.
[0115] The individual component 100 can be removably attached to the tubular body 2.
[0116] Therefore, advantageously, in the event of spring 7 failure or parachute device 5 intervention, the entire assembly 100 can be replaced.
[0117] As is well known, in practice, the parachute device 5 needs to be replaced when it is engaged.
[0118] Regarding the second sensor 8, it should be noted that the second switch 8 is located in the first seat 4C of the supporting body 4.
[0119] Preferably, the first switch 9 is fixed to the support body 4 in region 4D.
[0120] According to a preferred embodiment, the tubular body 2 has an octagonal cross-section.
[0121] The motor 3 includes a rotor connected to the tubular body 2.
[0122] Motor 3 is a tubular motor.
[0123] Preferably, according to the first embodiment, the motor 3 is connected to the inner surface of the tubular body 2 via a flange 60.
[0124] Advantageously, the actuation unit manufactured in this way allows for a reduction in overall size, making it suitable for use in reduced spaces, such as in the case of rolling blinds.
[0125] Advantageously, actuators manufactured in this way are particularly useful during assembly and installation.
[0126] According to one aspect, the centrifugal brake 50 includes a disc-shaped body 51 having a recessed portion 52 on its outer surface.
[0127] According to one aspect, the support body 4 includes a stop portion 10 that is designed to contact certain elements of the parachute device 5, more specifically, at least one contact element 30 of the disc-shaped body 51 (during the intervention of the centrifugal brake 50).
[0128] According to one aspect, such as Figure 5 As shown, the disc-shaped body 51 includes a first part 51A and a second part 51B.
[0129] According to a preferred embodiment, the centrifugal brake 50 includes a gear 27 received inside a disc-shaped body 51, more specifically inside two portions 51A and 51B.
[0130] Gear 27 is defined by rotor section 50A.
[0131] Gear 27 has multiple slots 52' and also has a center hole 53.
[0132] According to the first embodiment, the shaft 6 is coupled to part 50A of the parachute device 5 through the central hole 53.
[0133] The coupling using hole 53 allows the rotation of shaft 6 to be transmitted to part 50A of parachute device 5, i.e., to gear 27.
[0134] The centrifugal brake 50 includes multiple movable blocking elements 54.
[0135] Each movable blocking element 54 is accommodated in each slot 52' of the gear 27.
[0136] According to, for example Figure 11 In the preferred embodiment shown, the plurality of movable blocking elements 54 include spherical elements 54'.
[0137] Specifically, when the centrifugal brake 50 is activated, the spherical element 54' positioned in the groove 52' emerges from the groove 52' due to centrifugal force.
[0138] More precisely, the spherical element 54' is blocked between the gear 27 and the disc-shaped body 51, thereby causing the disc-shaped body 51 to move due to the rotation of the gear 27.
[0139] In this way, as described in more detail below, the centrifugal brake 50 of the parachute device 5 has an intervention condition.
[0140] According to one aspect, the disc-shaped body includes a first edge 51C extending around at least a portion of the first portion 51A.
[0141] According to one aspect, the support body 4 has a first contact portion 4B, which is configured to contact the first edge 51C (or contact element 30) during actuation of the centrifugal brake 50.
[0142] According to one embodiment, the disc-shaped body 51 is configured to rotate relative to the support body 4 in a first rotational direction W1 after the centrifugal brake 50 is actuated.
[0143] According to one embodiment, the first and second sensors (switches) 9 and 8 are configured to generate a first signal after the torsion spring 7 breaks and a second signal after the centrifugal brake 50 is actuated.
[0144] Advantageously, upon receiving the first signal and / or the second signal, the power supply to the motor 3 can be disconnected, thereby placing the actuation unit under safe conditions.
[0145] The following describes the activation conditions of the centrifugal brake 50 and the failure conditions of the spring 7.
[0146] As described above, the second switch 8 is configured to detect the actuation of the centrifugal brake 50 due to the closing wall exceeding a predetermined descent speed value.
[0147] The following will explain what happens in this situation, where the intervention of the centrifugal brake 50 maintains the mechanical integrity of the roller shutter unit and the safety of the user; therefore, it is an active safety element in all intents and purposes.
[0148] It should be noted that it is an abnormal event for the closing wall to exceed the predetermined descent speed value due to a failure of any electrical and / or mechanical component of the motor, or the motor brake, or other components of the kinematic motor—such as the movable closing wall (e.g., even the spring itself).
[0149] In these cases, as the closing wall accelerates downward, the rotor portion 50A of the centrifugal brake also accelerates; thus, the gear 27 accelerates, thereby transmitting the centrifugal acceleration to the rolling element 54, which is pushed radially toward the radial periphery of the disc-shaped body 51, i.e., toward the inner wall.
[0150] Therefore, the rolling element 54 engages in the radial peripheral region between the disc-shaped body 51 and the gear 27, making the gear 27 and the disc-shaped body 51 effectively a rotating whole.
[0151] Under these conditions, the disc-shaped body 51 also rotates relative to the supporting body 4 due to the rotation of the gear 27 actuated by the falling of the movable wall.
[0152] The rotation of the disc-shaped body 51 relative to the support body 4 means that the seat 52 on which the second switch 8 acts moves relative to the support body 4, that is, relative to the second sensor 8 (as described above, the second sensor 8 is in a fixed position relative to the support body 4).
[0153] Therefore, the slider 8A of the second switch 8 no longer functions in the seat 52, but in another peripheral area of the disc-shaped body 51 (with a different radial height), thus transitioning from one logical state (preferably "closed") to another logical state (preferably "open").
[0154] The switching of the second switch 8 from the "closed" logic state to the "open" logic state allows the actuation of the motor 3 to be disabled.
[0155] In fact, the second switch 8 is positioned in series in the circuit used to power the motor 3.
[0156] Therefore, it can be understood that the second signal of the second switch 8 is a signal for the intervention of the centrifugal brake 50.
[0157] On the other hand, regarding the first sensor (switch) 9, it should be noted that it is configured to detect the failure of the torsion spring 7 or the unloaded state of the spring 7.
[0158] In other words, the first switch 9 detects whether the torsion spring 7 is no longer under tension (that is, the accumulated elastic energy).
[0159] As is well known, during the period from the open position of the inlet to the closed position of the inlet, the torsion spring 7 is compressed, thereby accumulating elastic energy.
[0160] The operating mechanism of the actuation unit relative to the first sensor 9 is as follows.
[0161] When spring 7 is unloaded, another spring 25 will activate the main body 20 to remain in a predetermined angular position (first position) relative to the supporting main body 4.
[0162] Regarding the first corner position of the activation body 20 in the first embodiment... Figure 7 As shown in the figure, and regarding the second embodiment in Figure 15 and Figure 17 As shown in the image.
[0163] At the first corner position of the activated body 20, the first sensor (switch) 9 has a predetermined logic state (preferably, "off").
[0164] In fact, the first sensor 9 (more precisely, the slider 9A used to activate the switch 9) is in the first region 29A of the activation body 20 ( Figure 10 (Operate at ) location.
[0165] Therefore, in such a case, the first sensor 9 can be advantageously used to provide an "unload" spring 7 signal, which can be used, for example, by a technical operator during installation / maintenance.
[0166] Due to the rotation of motor 3 (in the direction marked W1), the rotational motion of motor 3 is transmitted to the end 7A of spring 7 (away from centrifugal brake 50 and close to motor 3).
[0167] The rotation of the end 7A of the spring 7 (away from and closer to the motor 3 relative to the centrifugal brake 50) causes the activation body 20 to rotate to its angular contact position, that is, the second angular position (the position defined by the relative dimensions of the protrusion 23B and the recess 23A).
[0168] Regarding the second corner position of the activation body 20 in the first embodiment... Figure 6 As shown in the figure, and regarding the second embodiment in Figure 16 and Figure 18 As shown in the image.
[0169] Starting from the second corner position of the activated body 20, the further rotation of the motor 3 (in the direction marked W1) causes the spring 7 to be loaded, that is, elastic energy is accumulated in the spring 7.
[0170] At the second corner position of the activated body 20, the additional spring 25 is compressed.
[0171] It should be noted that, in the absence of an external force acting on the activating body 20, the spring 25 will tend to push the activating body 20 from the second corner position to the first corner position.
[0172] It should also be noted that at the second corner position of the activated body 20, the logic state of the first sensor 8 ("closed" logic state) is different from the logic state of the first position ("open" logic state).
[0173] In the event of spring 7 failure, the active body 20 is no longer constrained by spring 7 and therefore rotates freely from the second corner position toward the first corner position.
[0174] Since the other spring 25 is compressed, in the event that spring 7 fails, spring 7 releases the accumulated elastic energy and causes the active body 20 to rotate from the second position toward the first position.
[0175] Therefore, due to the movement of the activating body 20, the first sensor 9 is able to switch logic states.
[0176] Based on the basic principles of this invention, this determines the switching of the first sensor 9 from one logical state to another.
[0177] The switching of the first sensor 9 corresponds to the failure signal of the spring 7.
[0178] The following describes some differences between the first embodiment (as described above) and the second embodiment (which will now be introduced), particularly in terms of fixing the closing wall and the transmission of motion from the motor 3 to the centrifugal brake 50 and the spring 7.
[0179] According to this second embodiment, the spring 7 is installed on the outside of the tubular body 2.
[0180] In this case, the actuation unit includes an outer bushing 32 that rotates with the rotor 3.
[0181] The closing wall is fixed to the bushing 32.
[0182] The bushing 32 receives motion directly or through an inserted element from the tubular body 2.
[0183] The actuation unit also includes a bushing 80, which rotates freely, meaning that the bushing 80 is not actuated by the motor 3.
[0184] According to the second embodiment, one end 7B of the spring is directly fixed to the activation body 20.
[0185] According to the second embodiment, the activation body 20 is provided with a limiting recess 23A, and the support body 4 includes a protrusion 23B defined by a screw and / or a sleeve keyed to the screw, the protrusion 23B engaging in the recess 23A with a gap.
[0186] It should be noted that the shape of the recess 23A, which has a gap relative to the protrusion 23B, determines the possibility of the activation body 20 rotating relative to the support body 4.
[0187] It should be noted that the second embodiment is essentially the same as the first embodiment in terms of the operating principle of the first sensor 9 or the second sensor 8.
[0188] According to the second embodiment, the actuation unit has no shaft 6: the movement of the bushing 32 is performed by the tubular body 2 (by means of shape coupling that allows the transmission of torsional torque) or by an element inserted between the tubular body 2 and the bushing 32, allowing the transmission of rotational motion.
Claims
1. An actuation unit for actuating a rolling closing wall, characterized in that, include: - A tubular body (2) having a main extension direction (D) and a first end (2A) and a second end (2B); - Motor (3), which is configured to rotate the tubular body (2), - Support body (4), which has a first receiving seat (40). - A parachute device (5), which is housed in a first receiving seat (40) of the support body (4) and includes a centrifugal brake (50) operably coupled to the tubular body (2) in use, the parachute device (5) being configured to operate and prevent rotation of the tubular body (2) when a predetermined rotational speed of the tubular body (2) is exceeded. - At least one torsion spring (7) having a third end (7A) coupled to the motor (3) for rotation; - A first sensor (9) is configured to detect a signal relating to the state of the torsion spring (7).
2. The actuation unit according to claim 1, characterized in that, The first sensor (9) is associated with the support body (4).
3. The actuation unit according to claim 2, characterized in that, It includes a second sensor (8) which is located in the support body (4) and configured to detect the actuation of the centrifugal brake (50).
4. The actuation unit according to any one of claims 1-3, characterized in that, It includes: - Activate the main body (20), which is partially rotatable relative to the supporting main body (4); And among them: - The torsion spring (7) also has a fourth end (7B) opposite to the third end (7A), the fourth end (7B) being operably connected directly or indirectly to the activation body (20). - The first sensor (9) is configured to switch due to the rotation of the activation body (20).
5. The actuation unit according to claim 4, characterized in that, The activation body (20) is configured to rotate less than 45° relative to the support body (4).
6. The actuation unit according to claim 4, characterized in that, The activation body (20) includes a second receiving seat (21), and the fourth end (7B) is fixed to the activation body (20) and inserted into the second receiving seat (21).
7. The actuation unit according to claim 4, characterized in that, The activation body (20) has a disk shape.
8. The actuation unit according to claim 4, characterized in that, It includes a fixing body (22) for fixing the torsion spring (7), the fourth end (7B) of the torsion spring (7) being fixed to the fixing body (22), and wherein the activating body (20) is coupled to the fixing body (22).
9. The actuation unit according to claim 4, characterized in that, One of the activation body (20) and the support body (4) includes a limiting recess (23A), and the other of the support body (4) and the activation body (20) includes a protrusion (23B) configured to be inserted into the limiting recess (23A); the limiting recess (23A) and the protrusion (23B) are configured as a constraint device to limit partial rotation of the activation body (20) relative to the support body (4).
10. The actuation unit according to claim 4, characterized in that, The activation body (20) has an activation protrusion (24A) or an activation recess, which is configured to engage with the first sensor (9) when the activation body (20) is in a predetermined angular position relative to the support body (4).
11. The actuation unit according to claim 4, characterized in that, It includes an additional spring (25) operatively coupled to the activation body (20) and the support body (4).
12. The actuation unit according to claim 11, characterized in that, The support body (4) includes a seat (26) for accommodating the additional spring (25), and one end of the additional spring (25) is coupled to the activation body (20).
13. The actuation unit according to claim 11, characterized in that, The spring (25) is a linear spring.
14. The actuation unit according to claim 3, characterized in that, The second sensor (8) is configured to detect the actuation of the centrifugal brake (50) due to a descent speed exceeding the closing wall relative to a predetermined value.
15. The actuation unit according to claim 3, characterized in that, It includes a control unit connected to the first sensor (9) and configured to release an alarm signal based on the state of a signal received from the first sensor (9).
16. The actuation unit according to claim 15, characterized in that, It includes a signal unit that communicates with the control unit, the signal unit being configured to supply signals related to the first sensor (9) and / or the second sensor (8).
17. The actuation unit according to any one of claims 1-3, characterized in that, The motor (3) includes a rotor connected to the tubular body (2).
18. The actuation unit according to any one of claims 1-3, characterized in that, The support body (4) includes a stop portion (10) designed to contact the parachute device (5) when the centrifugal brake (50) is actuated.
19. The actuation unit according to claim 3, characterized in that, The centrifugal brake (50) includes a disc-shaped body (51).
20. The actuation unit according to claim 19, characterized in that, The disc-shaped body (51) has a recessed portion (52).
21. The actuation unit according to claim 20, characterized in that, When the centrifugal brake (50) is not actuated, the second sensor (8) contacts the recessed portion (52).
22. The actuation unit according to any one of claims 19 to 21, characterized in that, The disc-shaped body (51) includes a first part (51A) and a second part (51B).
23. The actuation unit according to claim 22, characterized in that, The disc-shaped body (51) includes a first edge (51C) extending around at least a first portion (51A).
24. The actuation unit according to claim 23, characterized in that, The support body (4) has a first contact portion (4B) configured to potentially contact the first edge (51C) during actuation of the centrifugal brake (50).
25. The actuation unit according to any one of claims 19 to 21, characterized in that, The disc-shaped body (51) includes a second edge (51D) extending around at least the second portion (51B).
26. The actuation unit according to claim 25, characterized in that, The support body (4) has a second contact portion (4A) configured to contact the second edge (51D).
27. The actuation unit according to claim 19, characterized in that, The centrifugal brake (50) includes a gear (27) which is received inside the disc-shaped body (51) and has a plurality of slots (52') and a central hole (53).
28. The actuation unit according to claim 27, characterized in that, The centrifugal brake (50) includes a plurality of movable blocking elements (54), each movable blocking element (54) being accommodated in each slot (52') of the gear (27).
29. The actuation unit according to claim 28, characterized in that, The plurality of movable blocking elements (54) include spherical or cylindrical elements (54').
30. The actuation unit according to any one of claims 1-3, characterized in that, The parachute device (5) is configured to rotate relative to the support body (4) in a first rotational direction (W1) after the actuation of the centrifugal brake (50).
31. The actuation unit according to any one of claims 1-3, characterized in that, The tubular body (2) has an octagonal cross-section.
32. The actuation unit according to any one of claims 1-3, characterized in that, The tubular body (2) has a cylindrical cross-section.
33. The actuation unit according to any one of claims 1-3, characterized in that, The first sensor (9) is configured to generate a first signal accordingly after the torsion spring (7) breaks.
34. The actuation unit according to any one of claims 1-3, characterized in that, The first sensor (9) is limited by a switch.
35. The actuation unit according to claim 3, characterized in that, The second sensor (8) is limited by a switch.