Coupler-free power device and lifting window

Abstract

The utility model relates to a coupler-free power device used for lifting a movable window, and the power device comprises a motor assembly which comprises an output shaft which extends along a first direction and outputs torque; the chain wheel mechanism and the motor assembly are fixed in the first direction, the chain wheel mechanism and the motor assembly are fixed in the second direction perpendicular to the first direction, and the chain wheel mechanism comprises a chain wheel shaft directly connected with the output shaft, a chain wheel connected with the chain wheel shaft and a chain erected on the chain wheel; wherein the extension direction of the central axis L1 of the output shaft is marked as the first direction, a coupling hole extending in the first direction is formed in the chain wheel shaft, and the output shaft is inserted into the coupling hole in the first direction, so that a coupling is omitted, and on the basis of guaranteeing the structural stability, due to the fact that no middleware (coupling) is contained for transmitting power, accessories are reduced, the whole is more stable, and the service life is prolonged. Relative shaking and sliding are not prone to occurring.

Description

Technical Field

[0001] The present application relates to the technical field of lifting windows, and in particular to a power device and a lifting window for a heavy lifting window. Background Art

[0002] The smart lifting windows on the market usually have fixed windows and movable windows that can move up and down. The movable windows are often lifted and lowered by the cooperation of chains and sprockets. The motor is responsible for outputting torque to the sprocket to provide lifting power. Existing motors and sprockets are generally linked through an intermediate (coupling). The disadvantage is that after adding the coupling, many uncertain factors are added. For example, the poor concentricity of the coupling will cause the power output by the motor to fail to drive the moving end smoothly, and the movement will be blocked or even stopped; for example, if the coupling is poorly installed, the motor output end and the coupling will slide relative to each other, there will be high power loss, and noise will be generated; for example, if the hardness of the coupling is poor, the keyway connecting the motor output end and the keyway connecting the moving end will undergo permanent deformation, resulting in loose installation, and in severe cases, it will be disconnected from the coupling and unable to transmit. Utility Model Content

[0003] The purpose of the present application is to provide a heavy-duty lifting window and a power device thereof which have a simple structure, omit the unstable assembly element of a coupling, and can achieve a stable connection between a motor and a sprocket.

[0004] According to one aspect of the present application, there is provided a coupling-free power device for lifting a movable window, the power device comprising:

[0005] A motor assembly including an output shaft extending in a first direction and outputting a torque;

[0006] A sprocket mechanism is fixed to the motor assembly along a first direction and fixed along a second direction perpendicular to the first direction, and the sprocket mechanism includes: a sprocket shaft directly connected to the output shaft, a sprocket connected to the sprocket shaft, and a chain mounted on the sprocket; wherein, the extension direction of the center axis L1 of the output shaft is recorded as the first direction, a coupling hole extending along the first direction is formed on the sprocket shaft, and the output shaft is inserted into the coupling hole along the first direction.

[0007] More preferably, the center axis L2 of the sprocket shaft coincides with the center axis L3 of the coupling hole and the center axis L1 of the output shaft;

[0008] One end of the chain is connected to the counterweight rod, and the other end is connected to the movable window. The envelope angle of the chain on the sprocket is recorded as R, which satisfies the relationship: 90°<R<270°.

[0009] More preferably, a keyway extending along the first direction is formed on the hole wall of the coupling hole, and a positioning key matching the keyway is formed on the output shaft. When the output shaft is inserted into the coupling hole along the first direction, the positioning key is inserted into the keyway along the first direction to limit the relative rotation of the output shaft and the sprocket shaft around the central axis L1.

[0010] More preferably, the motor assembly further comprises:

[0011] A motor, located at an end of the output shaft away from the sprocket mechanism, wherein the output shaft extends from an end of the motor close to the sprocket shaft along a first direction;

[0012] The motor seat is located between the motor and the sprocket mechanism, and one end of the motor is bolted to the motor along a first direction, and the other end of the motor is bolted to the sprocket mechanism along a second direction.

[0013] More preferably, the motor base comprises:

[0014] The first seat body is formed with a first screw hole penetrating along a first direction, and the motor seat is bolted to the motor along the first direction through the first screw hole;

[0015] The first connection portion is formed by extending from the first seat body toward one end away from the motor and along the first direction. A second screw hole is formed on the first connection portion and passes through the first connection portion along the second direction. The motor seat is bolted to the sprocket mechanism along the second direction through the second screw hole.

[0016] More preferably, the sprocket mechanism further comprises:

[0017] The sprocket seat is integrally formed with a bearing hole extending through the sprocket seat in a first direction, the sprocket shaft is arranged on the sprocket seat, and the sprocket shaft is rotatably connected to the bearing hole; wherein,

[0018] The sprocket seat comprises:

[0019] Bottom plate,

[0020] A first support is formed by integrally extending upward from the bottom plate,

[0021] The second support is integrally extended upward from the base plate and is opposite to the first support with a gap therebetween. The second support is located on a side of the first support away from the motor. A second connecting portion opposite to the first connecting portion is formed on the first support. A third screw hole penetrating along a second direction is formed on the second connecting portion. The third screw hole cooperates with the second screw hole to realize bolt connection between the motor seat and the sprocket seat in the second direction.

[0022] More preferably, the bearing hole is formed on the first support and the second support, the bearing hole formed on the first support is marked as the first bearing hole, and the bearing hole formed on the second support is marked as the second bearing hole, one end of the sprocket shaft extends into the first bearing hole, and the other end extends into the second bearing hole, the diameter of the first bearing hole is larger than the diameter of the sprocket shaft, and during installation, one end of the sprocket shaft first extends into the first bearing hole and then into the second bearing hole;

[0023] The sprocket seat also includes:

[0024] bearings, respectively disposed in the first bearing hole and the second bearing hole;

[0025] an anti-chain-jumping plate fixed to the sprocket seat, wherein the anti-chain-jumping plate is spaced apart from the chain in the second direction; when the chain jumps along the second direction, the chain abuts against the anti-chain-jumping plate and is pressed back onto the sprocket to mesh with the sprocket;

[0026] A bearing pressure plate, in the first direction, the bearing pressure plate is located between the motor seat and the sprocket seat, and the bearing is located on a side of the bearing pressure plate away from the motor seat and abuts against the bearing pressure plate.

[0027] A heavy-duty lifting window comprises the power device, and the heavy-duty lifting window further comprises:

[0028] a window frame, the power device being mounted on the window frame;

[0029] A fixed window, fixed to the window frame;

[0030] The movable window is connected to the power device and is slidably connected to the window frame; the window frame includes:

[0031] A profile crossbeam, with a receiving groove formed inside, and the power device is installed in the receiving groove;

[0032] The movable cover plate is rotatably connected to the profile beam, and the movable cover plate is rotated around the profile beam toward the second direction to open, so as to expose the power device in the accommodating groove for disassembly, assembly and maintenance by the user.

[0033] More preferably, the receiving tank comprises:

[0034] A first accommodating groove is located between the movable cover plate and the profile crossbeam;

[0035] A second containing groove is located at a side of the first containing groove away from the movable cover plate, and the power device is arranged in the second containing groove;

[0036] The baffle is arranged between the first accommodating groove and the second accommodating groove. When the user needs to disassemble and maintain the power device, the user first rotates the movable cover in the second direction around the profile beam to open the movable cover, and then removes the baffle along the second direction to expose the power device in the second accommodating groove for the user to disassemble and maintain.

[0037] More preferably, the heavy lift window further comprises:

[0038] The screen window rolling mechanism is arranged in the first accommodating groove, and the sprocket seat is arranged in the second accommodating groove and arranged side by side with the screen window rolling mechanism;

[0039] A counterweight rod, located in the window frame and connected to the chain;

[0040] The window frame also includes:

[0041] A screen window frame connected to the first accommodating groove;

[0042] A screen window, arranged at one end of the screen window frame away from the first accommodating groove and connected to the screen window rolling mechanism;

[0043] The movable window frame is connected to the second containing groove, and the movable window is arranged at one end of the movable window frame away from the second containing groove.

[0044] This application has the following beneficial effects:

[0045] By fixing the sprocket mechanism and the motor assembly along the first direction and the second direction, a stable and reliable assembly is provided for the power device, and then the output shaft of the motor assembly is directly connected to the sprocket shaft of the sprocket mechanism, thereby omitting the coupling. On the basis of ensuring structural stability, since there is no intermediate piece (coupling) to transmit power, the accessories are reduced, and the coupling is instead integrated into the moving end in disguise, so that the structure of the moving end is matched with the motor output end, making the whole more stable and less prone to relative shaking and sliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 This is a schematic diagram of the structure in which the power device according to one embodiment of the utility model is installed in a heavy lifting window;

[0048] Figure 2It is a structural schematic diagram of another perspective of the power device according to one embodiment of the utility model installed in a heavy lifting window;

[0049] Figure 3 This is a schematic diagram of a sprocket assembly and a motor assembly in a separated state according to an embodiment of the utility model;

[0050] Figure 4 This is a schematic diagram of the assembly state of the sprocket assembly and the motor assembly according to one embodiment of the utility model;

[0051] Figure 5 This is a schematic diagram of a three-dimensional structure in which a sprocket according to an embodiment of the utility model is installed on a sprocket seat;

[0052] Figure 6 It is a schematic diagram of the three-dimensional structure when the sprocket wheel according to one embodiment of the utility model is removed from the sprocket wheel seat;

[0053] Figure 7 This is a schematic diagram of the principle that the envelope angle between the sprocket and the chain is 180° according to one embodiment of the utility model;

[0054] Figure 8 This is a schematic diagram of the principle that the envelope angle between the sprocket and the chain is 90° according to one embodiment of the utility model;

[0055] Fig. 9 This is a schematic diagram of the principle that the envelope angle between the sprocket and the chain is 270° according to one embodiment of the utility model;

[0056] Fig.10 A side view of a heavy lift window according to an embodiment of the present utility model;

[0057] Fig.11 A top view of a heavy lifting window according to an embodiment of the utility model;

[0058] Description of Figure Numbers:

[0059] 100, power device; 200, movable window; 10, motor assembly; F1, first direction; 11, output shaft; 20, sprocket mechanism; 21, sprocket shaft; 22, sprocket; 23, chain; 350, counterweight rod; 211, coupling hole; 212, keyway; 111, positioning key; 12, motor; 13, motor seat; F2, second direction; 131, first seat body; 1311, first screw hole; 132, first connecting part; 1321, second screw hole; 24, sprocket seat; 2410, bearing hole; 241, bottom plate; 242, first support; 243, first Two supports; 2421, second connecting part; 2422, third screw hole; 2411, first bearing hole; 2412, second bearing hole; 25, bearing; 26, anti-jump chain plate; 27, bearing pressure plate; 300, heavy-duty lifting window; 310, window frame; 320, fixed window; 311, profile beam; 313, accommodating groove; 312, movable cover plate; 3131, first accommodating groove; 3132, second accommodating groove; 3133, baffle; 340, screen window rolling mechanism; 350, counterweight rod; 314, screen window frame; 315, screen window; 316, movable window frame. DETAILED DESCRIPTION

[0060] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0061] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0063] Please refer to Figure 1 - Fig.11 In one embodiment of the present application, a coupling-free power device 100 is provided for lifting a movable window 200 . The power device 100 includes: a motor assembly 10 and a sprocket mechanism 20 .

[0064] The motor assembly 10 includes an output shaft 11 extending in a first direction F1 and outputting torque. The sprocket mechanism 20 is fixed to the motor assembly 10 in the first direction F1 and in a second direction F2 perpendicular to the first direction F1, and the sprocket mechanism 20 includes: a sprocket shaft 21 directly connected to the output shaft 11, a sprocket 22 connected to the sprocket shaft 21, and a chain 23 mounted on the sprocket 22, thereby omitting the coupling. On the basis of ensuring structural stability, since there is no intermediate piece (coupling) to transmit power, accessories are reduced, and the coupling is integrated into the moving end in disguise, so that the structure of the moving end is matched with the motor output end, making the whole more stable and less prone to relative shaking and sliding.

[0065] In this embodiment, the sprocket shaft 21 and the sprocket 22 are integrally formed, thereby further reducing the number of parts, simplifying the assembly process, and not requiring additional connecting parts, thereby reducing the complexity and cost of assembly. At the same time, the integrally formed design can increase the bonding strength between the sprocket 22 and the sprocket shaft 21, reduce the possibility of loosening and swinging, and improve the stability and reliability of the device. At the same time, since the sprocket shaft 21 and the sprocket 22 are integrally formed, the friction area is reduced, and the friction force is also reduced accordingly, which can reduce energy loss and improve the efficiency of the device. At the same time, the integrally formed design reduces the use of connecting parts, reduces the frequency of maintenance and replacement, and reduces operating costs.

[0066] One end of the chain 23 is connected to the counterweight rod 350 , and the other end is connected to the movable window 200 . The envelope angle of the chain 23 on the sprocket 22 is denoted as R, which satisfies the relationship: 90°<R<270°.

[0067] Among them, directly connecting the sprocket shaft 21 to the output shaft 11 of the motor 12 can reduce the transmission components, simplify the structure, and reduce the complexity of the system and the possibility of failure. By fixing the sprocket mechanism 20 in the first direction F1 and the second direction F2 perpendicular thereto, the stability and balance of the entire device during operation are ensured, vibration and swing are reduced, and the working efficiency and safety of the system are improved. Setting the envelope angle R of the chain 23 on the sprocket 22 in the range of 90°<R<270° helps to reduce the possibility of the chain 23 jumping during movement. The setting within this range can maintain good contact between the chain 23 and the sprocket 22, avoiding the chain 23 from falling off or jumping teeth on the sprocket 22, thereby ensuring the stability and reliability of the device.

[0068] More preferably, the extension direction of the central axis L1 of the output shaft 11 is recorded as the first direction F1, and a coupling hole 211 extending along the first direction F1 is formed on the sprocket shaft 21, the output shaft 11 is inserted into the coupling hole 211 along the first direction F1, and the central axis L2 of the sprocket shaft 21 coincides with the central axis L3 of the coupling hole 211 and the central axis L1 of the output shaft 11.

[0069] Among them, by aligning the coupling hole 211 on the sprocket shaft 21 with the output shaft 11, the correct insertion and docking between the two is ensured. This alignment ensures the continuity and stability of power transmission. By aligning the central axis L2 of the sprocket shaft 21 with the central axis L3 of the coupling hole 211 and the central axis L1 of the output shaft 11, the stability of the connecting parts is ensured. Such a design can reduce unnecessary friction and vibration, improve the working efficiency and life of the system, and at the same time, reduce the errors and problems that may occur during assembly, and reduce the difficulty of maintenance and troubleshooting.

[0070] More preferably, a key slot 212 extending along the first direction F1 is formed on the hole wall of the coupling hole 211, and a positioning key 111 matching the key slot 212 is formed on the output shaft 11. When the output shaft 11 is inserted into the coupling hole 211 along the first direction F1, the positioning key 111 is inserted into the key slot 212 along the first direction F1 to limit the relative rotation of the output shaft 11 and the sprocket shaft 21 around the central axis L1.

[0071] Among them, by forming a keyway 212 on the hole wall of the coupling hole 211 and forming a positioning key 111 on the output shaft 11, the fixed position of the output shaft 11 in the coupling hole 211 can be achieved. This design can ensure that the relative position between the output shaft 11 and the sprocket shaft 21 remains stable, avoiding unnecessary swinging or misalignment during operation. The positioning key 111 is inserted along the keyway 212 to limit the relative rotation of the output shaft 11 and the sprocket shaft 21 around the central axis L1. This setting can ensure that the output shaft 11 and the sprocket shaft 21 remain in a fixed position during operation, and no unnecessary rotation or offset occurs, thereby maintaining the stability and reliability of the system. Through the cooperation of the keyway 212 and the positioning key 111, the connection accuracy between the output shaft 11 and the sprocket shaft 21 can be improved. In this way, the position and direction of the connecting parts can be ensured to be accurate, which reduces the errors and problems that may occur during operation and improves the working efficiency and reliability of the system.

[0072] More preferably, the motor assembly 10 further includes: a motor 12 and a motor base 13 .

[0073] The motor 12 is located at an end of the output shaft 11 away from the sprocket mechanism 20, and the output shaft 11 extends along the first direction F1 from an end of the motor 12 close to the sprocket shaft 21. The motor seat 13 is located between the motor 12 and the sprocket mechanism 20, and one end is bolted to the motor 12 along the first direction F1, and the other end is bolted to the sprocket mechanism 20 along the second direction F2.

[0074] Among them, by installing the motor 12 at the end of the output shaft 11 away from the sprocket mechanism 20, the size of the entire power device 100 can be made more compact. Such a layout can save space and make the device more suitable for installation and use in a limited space. By installing the motor base 13 between the motor 12 and the sprocket mechanism 20, a solid support can be provided for the motor 12. One end is connected to the motor 12 by bolts, and the other end is connected to the sprocket mechanism 20 by bolts, ensuring the stability and firmness of the motor base 13. By fixing the connection points between the motor 12 and the sprocket mechanism 20 in different directions, the load can be effectively dispersed, and the vibration and swing during the operation of the system can be reduced, thereby improving the reliability and durability of the entire device.

[0075] More preferably, the motor base 13 includes a first base body 131 and a first connecting portion 132 .

[0076] The first seat body 131 is formed with a first screw hole 1311 penetrating along the first direction F1, and the motor seat 13 is bolted to the motor 12 along the first direction F1 through the first screw hole 1311. The first connecting portion 132 is formed extending from the first seat body 131 toward an end away from the motor 12 and along the first direction F1, and the first connecting portion 132 is formed with a second screw hole 1321 penetrating along the second direction F2, and the motor seat 13 is bolted to the sprocket mechanism 20 along the second direction F2 through the second screw hole 1321.

[0077] Among them, the first screw hole 1311 on the first seat body 131 is used for bolt connection with the motor 12 along the first direction F1, and the second screw hole 1321 on the first connecting part 132 is used for bolt connection with the sprocket mechanism 20 along the second direction F2. This design allows connection in two directions respectively, which increases the flexibility and convenience of assembly. By bolting in two directions, the firm fixation between the motor seat 13 and the sprocket mechanism 20 can be ensured. This structure can effectively withstand the forces and vibrations generated during operation and maintain the stability and reliability of the device. The design of the first seat body 131 and the first connecting part 132 makes the layout of the screw holes more reasonable, thereby enhancing the stability and strength of the connection. This arrangement can ensure that the device will not loosen or fall off during operation, thereby improving the reliability of the entire system.

[0078] More preferably, the sprocket mechanism 20 further includes a sprocket seat 24 .

[0079] The sprocket seat 24 is integrally formed with a bearing hole 2410 along the first direction F1 , the sprocket shaft 21 is disposed on the sprocket seat 24 , and the sprocket shaft 21 is rotatably connected to the bearing hole 2410 .

[0080] Among them, by forming a bearing hole 2410 on the sprocket seat 24 and arranging the sprocket shaft 21 thereon, the sprocket shaft 21 can be effectively supported to ensure its stability and balance during operation. The existence of the bearing 25 can reduce the friction and wear between the sprocket shaft 21 and the sprocket seat 24, and extend the service life of the entire device. The rotational connection between the sprocket shaft 21 and the bearing hole 2410 enables the sprocket 22 to rotate smoothly when the device is running, and realizes the smooth transmission of the chain 23. Such a setting can ensure that the sprocket shaft 21 will not get stuck or unstable during operation, thereby improving the working efficiency and reliability of the system. The sprocket seat 24 is integrally penetrated along the first direction F1 to form a bearing hole 2410, so that the sprocket shaft 21 is evenly supported and fixed in the sprocket seat 24. This structural design ensures the stability and reliability of the device during operation, reduces vibration and noise, and improves the performance of the entire system.

[0081] More preferably, the sprocket seat 24 includes: a bottom plate 241 , a first support 242 and a second support 243 .

[0082] Among them, the first support 242 is integrally extended upward from the bottom plate 241, the second support 243 is integrally extended upward from the bottom plate 241, and is opposite to the first support 242 with a gap set, the second support 243 is located on the side of the first support 242 away from the motor 12, and a second connecting portion 2421 opposite to the first connecting portion 132 is formed on the first support 242, and a third screw hole 2422 is formed on the second connecting portion 2421 and passes through along the second direction F2, and the third screw hole 2422 cooperates with the second screw hole 1321 to realize the bolt connection between the motor seat 13 and the sprocket seat 24 in the second direction F2.

[0083] Among them, the first support 242 and the second support 243 are formed by extending upward from the bottom plate 241, and the facing arrangement and appropriate gap between them ensure the stability of the support. This structural design enables the sprocket seat 24 to be evenly supported, ensuring the stability of the entire device during operation. The second connecting portion 2421 formed on the first support 242 cooperates with the second screw hole 1321 to realize the bolt connection between the motor seat 13 and the sprocket seat 24 in the second direction F2. Such an arrangement ensures that the connection between the motor seat 13 and the sprocket seat 24 is tight, avoiding loosening or falling off during operation.

[0084] Preferably, the bearing hole 2410 is formed on the first support 242 and the second support 243, the bearing hole 2410 formed on the first support 242 is recorded as the first bearing hole 2411, and the bearing hole 2410 formed on the second support 243 is recorded as the second bearing hole 2412, one end of the sprocket shaft 21 extends into the first bearing hole 2411, and the other end extends into the second bearing hole 2412, and the diameter of the first bearing hole 2411 is larger than the diameter of the sprocket shaft 21, see Figure 5 and Figure 6 During installation, one end of the sprocket shaft 21 first extends into the first bearing hole 2411 and then extends into the second bearing hole 2412.

[0085] More preferably, the sprocket seat 24 further includes: a bearing 25 , an anti-chain jumping plate 26 and a bearing pressure plate 27 .

[0086] The bearing 25 is respectively arranged in the first bearing hole 2411 and the second bearing hole 2412. The anti-jumping chain plate 26 is fixed to the sprocket seat 24. In the second direction F2, the anti-jumping chain plate 26 is spaced apart from the chain 23. When the chain 23 jumps along the second direction F2, the chain 23 abuts against the anti-jumping chain plate 26 and is pressed back onto the sprocket 22 to engage with the sprocket 22. In the first direction F1, the bearing pressure plate 27 is located between the motor seat 13 and the sprocket seat 24. The bearing 25 is located on the side of the bearing pressure plate 27 away from the motor seat 13 and abuts against the bearing pressure plate 27.

[0087] Among them, by fixing the anti-chain jumping plate 26 and combining it with the sprocket seat 24, when the chain 23 jumps along the second direction F2, the anti-chain jumping plate 26 can prevent the chain 23 from jumping off the sprocket 22, and press it back onto the sprocket 22, ensuring that the engagement between the chain 23 and the sprocket 22 is not affected. Such a design can reduce the occurrence of chain jumping of the chain 23 and improve the stability and reliability of the system. The bearing pressure plate 27 is located between the motor seat 13 and the sprocket seat 24, and plays a role in fixing the bearing 25 in the first direction F1. The bearing 25 is located on the back of the bearing pressure plate 27 and abuts against the bearing pressure plate 27, ensuring that the position of the bearing 25 is stable. Such a setting helps to prevent the bearing 25 from moving due to vibration or external force during operation, thereby maintaining the stability and reliability of the system.

[0088] This specific embodiment further provides a heavy-duty lifting window 300 , including the power device 100 . The heavy-duty lifting window 300 also includes: a window frame 310 , a fixed window 320 , and a movable window 200 .

[0089] The power device of the window frame 310 is installed on the window frame 310. The fixed window 320 is fixed to the window frame 310. The movable window 200 is connected to the power device and is slidably connected to the window frame 310.

[0090] The window frame 310 includes a profile beam 311 and a movable cover plate 312 .

[0091] A receiving groove 313 is formed inside the profile beam 311, and the power device is installed in the receiving groove 313. The movable cover plate 312 is rotatably connected to the profile beam 311, and the movable cover plate 312 rotates around the profile beam 311 in the second direction F2 to open, so as to expose the power device in the receiving groove 313 for disassembly and maintenance by the user.

[0092] More preferably, the containing groove 313 includes: a first containing groove 3131 and a second containing groove 3132 .

[0093] The first receiving groove 3131 is located between the movable cover plate 312 and the profile beam 311. The second receiving groove 3132 is located on the side of the first receiving groove 3131 away from the movable cover plate 312, and the power device is arranged in the second receiving groove 3132. The baffle 3133 is arranged between the first receiving groove 3131 and the second receiving groove 3132. When the user needs to disassemble and maintain the power device, the movable cover plate 312 is first rotated in the second direction F2 around the profile beam 311 to open it, and then the baffle 3133 is removed along the second direction F2 to expose the power device in the second receiving groove 3132 for the user to disassemble and maintain it.

[0094] More preferably, the heavy-duty lifting window 300 further includes: a screen window rolling mechanism 340 and a counterweight rod 350 .

[0095] The screen reeling mechanism 340 is disposed in the first receiving groove 3131 , and the sprocket seat 24 is disposed in the second receiving groove 3132 and arranged side by side with the screen reeling mechanism 340 . The weight bar 350 is located in the window frame 310 and connected to the chain 23 .

[0096] More preferably, the window frame 310 further includes: a screen window frame 314 , a screen window 315 and a movable window frame 316 .

[0097] The screen window frame 314 is connected to the first receiving groove 3131. The screen window 315 is arranged at one end of the screen window frame 314 away from the first receiving groove 3131, and is connected to the screen window rolling mechanism 340. The movable window frame 316 is connected to the second receiving groove 3132, and the movable window 200 is arranged at one end of the movable window frame 316 away from the second receiving groove 3132.

[0098] Thus, by fixing the sprocket mechanism 20 and the motor assembly 10 along the first direction F1 and the second direction F2, a stable and reliable assembly is provided for the power device 100, and then the output shaft 11 of the motor assembly 10 is directly connected to the sprocket shaft 21 of the sprocket mechanism 20, thereby omitting the coupling. On the basis of ensuring the stability of the structure, since there is no intermediate piece (coupling) to transmit power, the accessories are reduced, and the coupling is integrated into the moving end in disguise, so that the structure of the moving end is matched with the output end of the motor 12, making the whole more stable and less prone to relative shaking and sliding. On the other hand, the envelope angle R between the chain 23 and the sprocket 22 is set to 90°<R<270°, which reduces the risk of the chain 23 jumping teeth.

[0099] The above-described embodiments only express several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A coupling-free power device for lifting a movable window, characterized in that: The power device comprises: A motor assembly including an output shaft extending in a first direction and outputting a torque; A sprocket mechanism is fixed to the motor assembly along a first direction and fixed along a second direction perpendicular to the first direction, and the sprocket mechanism includes: a sprocket shaft directly connected to the output shaft, a sprocket connected to the sprocket shaft, and a chain mounted on the sprocket; wherein, the extension direction of the center axis L1 of the output shaft is recorded as the first direction, a coupling hole extending along the first direction is formed on the sprocket shaft, and the output shaft is inserted into the coupling hole along the first direction.

2. The coupling-free power device according to claim 1, characterized in that: The central axis L2 of the sprocket shaft coincides with the central axis L3 of the coupling hole and the central axis L1 of the output shaft; One end of the chain is connected to the counterweight rod, and the other end is connected to the movable window. The envelope angle of the chain on the sprocket is recorded as R, which satisfies the relationship: 90°<R<270°.

3. The coupling-free power device according to claim 2, characterized in that: A keyway extending along the first direction is formed on the hole wall of the coupling hole, and a positioning key matching the keyway is formed on the output shaft. When the output shaft is inserted into the coupling hole along the first direction, the positioning key is inserted into the keyway along the first direction to limit the relative rotation of the output shaft and the sprocket shaft around the central axis L1.

4. The coupling-free power device according to claim 3, characterized in that: The motor assembly also includes: A motor, located at an end of the output shaft away from the sprocket mechanism, wherein the output shaft extends from an end of the motor close to the sprocket shaft along a first direction; The motor seat is located between the motor and the sprocket mechanism, and one end of the motor is bolted to the motor along a first direction, and the other end of the motor is bolted to the sprocket mechanism along a second direction.

5. The coupling-free power device according to claim 4, characterized in that: The motor base comprises: The first seat body is formed with a first screw hole penetrating along a first direction, and the motor seat is bolted to the motor along the first direction through the first screw hole; The first connection portion is formed by extending from the first seat body toward one end away from the motor and along the first direction. A second screw hole is formed on the first connection portion and passes through the first connection portion along the second direction. The motor seat is bolted to the sprocket mechanism along the second direction through the second screw hole.

6. The coupling-free power device according to claim 5, characterized in that: The sprocket mechanism also includes: The sprocket seat is integrally formed with a bearing hole extending through the sprocket seat in a first direction, the sprocket shaft is arranged on the sprocket seat, and the sprocket shaft is rotatably connected to the bearing hole; wherein, The sprocket seat comprises: Bottom plate, A first support is formed by integrally extending upward from the bottom plate, The second support is integrally extended upward from the base plate and is opposite to the first support with a gap therebetween. The second support is located on a side of the first support away from the motor. A second connecting portion opposite to the first connecting portion is formed on the first support. A third screw hole penetrating along a second direction is formed on the second connecting portion. The third screw hole cooperates with the second screw hole to realize bolt connection between the motor seat and the sprocket seat in the second direction.

7. The coupling-free power device according to claim 6, characterized in that: The bearing hole is formed on the first support and the second support, the bearing hole formed on the first support is marked as the first bearing hole, and the bearing hole formed on the second support is marked as the second bearing hole, one end of the sprocket shaft extends into the first bearing hole, and the other end extends into the second bearing hole, the diameter of the first bearing hole is larger than the diameter of the sprocket shaft, and during installation, one end of the sprocket shaft first extends into the first bearing hole and then extends into the second bearing hole; The sprocket seat also includes: bearings, respectively disposed in the first bearing hole and the second bearing hole; an anti-chain-jumping plate fixed to the sprocket seat, wherein the anti-chain-jumping plate is spaced apart from the chain in the second direction; when the chain jumps along the second direction, the chain abuts against the anti-chain-jumping plate and is pressed back onto the sprocket to mesh with the sprocket; A bearing pressure plate, in the first direction, the bearing pressure plate is located between the motor seat and the sprocket seat, and the bearing is located on a side of the bearing pressure plate away from the motor seat and abuts against the bearing pressure plate.

8. A heavy-duty lifting window, characterized in that: The heavy lifting window comprises a power device as described in any one of claims 1 to 7, and the heavy lifting window further comprises: a window frame, the power device being mounted on the window frame; A fixed window, fixed to the window frame; The movable window is connected to the power device and is slidably connected to the window frame; the window frame includes: A profile crossbeam, with a receiving groove formed inside, and the power device is installed in the receiving groove; The movable cover plate is rotatably connected to the profile beam, and the movable cover plate is rotated around the profile beam toward the second direction to open, so as to expose the power device in the accommodating groove for disassembly, assembly and maintenance by the user.

9. The heavy lift window according to claim 8, characterized in that: The receiving tank comprises: A first accommodating groove is located between the movable cover plate and the profile crossbeam; A second containing groove is located at a side of the first containing groove away from the movable cover plate, and the power device is arranged in the second containing groove; A baffle is disposed between the first accommodating groove and the second accommodating groove. When a user needs to disassemble and maintain the power device, the user first rotates the movable cover in the second direction around the profile beam to open the movable cover, and then removes the baffle along the second direction to expose the power device in the second accommodating groove for the user to disassemble and maintain.

10. The heavy lift window according to claim 9, characterized in that: The heavy-duty lifting window further comprises: The screen window rolling mechanism is arranged in the first accommodating groove, and the sprocket seat is arranged in the second accommodating groove and arranged side by side with the screen window rolling mechanism; A counterweight rod, located in the window frame and connected to the chain; The window frame also includes: A screen window frame connected to the first accommodating groove; A screen window, arranged at one end of the screen window frame away from the first accommodating groove and connected to the screen window rolling mechanism; The movable window frame is connected to the second containing groove, and the movable window is arranged at one end of the movable window frame away from the second containing groove.

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