CN218061875U - Transmission box and push-pull door and window - Google Patents

Abstract

The invention provides a transmission box and a push-pull door window, which comprise a shell, a driving assembly and a moving member, wherein the moving member is connected with the shell in a sliding manner, the driving assembly is connected with the shell in a rotating manner, the driving assembly is connected with the moving member in a transmission manner, the driving assembly is used for receiving external torque force and driving the moving member to move relative to the shell, the input end of the driving assembly rotates relative to the shell from a first angle position to a second angle position, after the external torque force is removed, the input end of the driving assembly self-resets relative to the shell from the second angle position to the first angle position, one end or two ends of the moving member are provided with connecting parts, and the connecting parts are used for connecting and driving external equipment to act; the handle is characterized by also comprising an outer frame, a fan body, a handle and a pulley assembly; the transmission box and the push-pull door and window have reasonable structure, the use is safe.

Description

Transmission box and push-pull door and window

Technical Field

The invention belongs to the technical field of hardware, and particularly relates to a transmission box and a push-pull door window.

Background

Doors or windows are basic components of modern buildings, and are distinguished according to the opening modes of doors and windows, and the doors and windows are mainly divided into casement doors and windows and push-pull doors and windows. The sliding door and window mainly comprises door and window leaves and a track, namely, the door and window leaves reciprocate along the track to realize the opening or closing of the door and window; meanwhile, due to the flexible opening, the sliding door and window can form separation on the space and can not occupy additional space when being opened, so that the sliding door and window is a door and window type which is used more frequently, for example, the sliding door and window is used between a balcony and a living room to form separation, and is also used between a kitchen and a restaurant. It is known that, in order to facilitate fixing or positioning of a sliding door on a rail at any time according to needs in the using process, for example, a young child in a home is prevented from entering and exiting a balcony randomly under the condition of ensuring basic ventilation, therefore, a pull-up type hardware is provided in the market, the main working principle is that a pulley block on the door and window can lift relative to a door and window body, namely, after the pulley block retracts relative to the rail or a chute, the door and window body and the rail form static friction, and then the door and window form fixing or positioning on the rail, for example, an european standard C notch lift-up type door and window hardware disclosed in the application number 201720561394.7. However, the push-pull doors and windows in the prior art have certain inconvenience or have certain potential safety hazard when in use, that is, the door and window is in the opening and closing process, especially in some heavy push-pull doors and windows in the opening and closing process, the rapid convolution of the handle driven by the transmission box in the reverse direction easily occurs under the action of the self gravity of the door and window sash, and then the handle can be hit to the human body and can cause injury to the human body. Particularly, promote the push-and-pull door when using, rotate handle 90 degrees or 180 degrees and then drive transmission box and move, the further drive pulley assembly of transmission box realizes the lifting to the fan body of door and window, and then makes the fan body of door and window can move in a flexible way for the frame or the track of door and window, can maintain the lock state of transmission box through locking mechanism at last, promptly, maintains the lifting state of door and window. On the contrary, after the locking state of the locking mechanism on the transmission box is released, the pulley assembly can reversely drive the transmission box to act under the action of gravity, namely the transmission box can reversely drive the handle of the handle to reversely rotate by 90 degrees or 180 degrees; furthermore, the fast-rotating lever handle may strike and injure the human body; and if the transmission box is in behind the lock-out state, and remove behind the moment of torsion power of effect on the handle, the handle can reset by oneself, just can effectively avoid in the traditional mode the handle to hit the problem that the human body and cause the injury because of the follow-up.

Disclosure of Invention

In view of this, the invention aims to provide a transmission box and a push-pull door window which are reasonable in structure and safe and reliable to use.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a transmission box, includes casing, drive assembly and moving part, the moving part with casing sliding connection, drive assembly with the casing rotates to be connected, drive assembly with the moving part transmission is connected, drive assembly is used for being connected with outside handle, drive assembly rotates and drives under the torsion effect of handle the moving part for the casing removes, drive assembly includes elastic element, the handle for when the casing rotates second angular position by first angular position, drive assembly drive the moving part removes to the locking position, just the moving part for the casing locking, simultaneously elastic element is compressed, after removing torsion, drive assembly's elastic element drives the moving part for the casing resets to first angular position by second angular position, the one end or both ends department of handle are provided with connecting portion, connecting portion are used for connecting and driving external equipment and move.

As a further improvement on the transmission box, the transmission box further comprises a trigger mechanism, the trigger mechanism comprises a trigger block, the trigger block is installed in the shell, the movable member is movably connected with the trigger block, and when the driving assembly drives the movable member to move upwards to the locking position relative to the shell and the trigger block, the trigger block moves outwards relative to the movable member and the shell, extends out of the shell, supports the movable member, and locks the movable member; when the trigger block is triggered by external force, the trigger block translates inwards relative to the movable piece and the shell and retracts into the shell, and when the trigger block retracts to a preset position, the movable piece moves downwards relative to the shell and the trigger block under the action of gravity and resets.

As a further improvement of the transmission box, the transmission box further comprises a lock tongue body, the lock tongue body is installed in the housing, the lock tongue body is movably connected with the movable part and the housing, the movable part is driven by the driving component to move upwards relative to the housing and the trigger block, the movable part drives the lock tongue body to retract inwards into the housing, when the trigger block is triggered by external force to retract to a preset position, the movable part moves downwards relative to the housing and the trigger block under the action of gravity, and simultaneously drives the lock tongue body to move outwards and extend out of the housing.

As a further improvement of the transmission box, the driving assembly further includes a base, a driving shaft and a driven wheel, the driving shaft penetrates through the housing and can rotate relative to the housing, the base, the driven wheel and the elastic element are all sleeved on the driving shaft, the driving shaft and the driven wheel can rotate relative to the base, and the base is fixed to the housing;

the base is fixed with a first limiting block, the drive shaft is fixed with a second limiting block, the driven wheel is fixed with a third limiting block, the first limiting block, the second limiting block and the third limiting block are arranged in the radial direction of the drive shaft, one end of the elastic element is connected with the base, and the other end of the elastic element is connected with the drive shaft.

As a further improvement of the transmission box, the driving assembly further comprises a first connecting rod, a first end of the first connecting rod is hinged to the movable member, a second end of the first connecting rod is hinged to the driven wheel, and a hinged point of the first connecting rod and the driven wheel deviates from an axial lead of the driven wheel.

As a further improvement of the transmission box, the driving assembly further comprises a rack, the rack is fixedly connected with the movable member, the driven wheel is a gear or a sector gear, and the driven wheel is meshed with the rack.

As a further improvement of the transmission box, the movable member is further provided with a seventh guide groove and a sixth guide post matched with the seventh guide groove, the seventh guide groove is arranged at intervals relative to the length direction of the movable member, the sixth guide post is arranged in the seventh guide groove, the sixth guide post is fixed with the shell, and the seventh guide groove is parallel to the axis of the movable member in the length direction.

As a further improvement of the transmission box, the transmission box further comprises a support gasket, the support gasket is located between the housing and the movable member, one surface of the support gasket is fixed with the movable member, the other surface of the support gasket is abutted against the inner wall of the housing, and the support gasket can slide relative to the housing.

As a further improvement of the transmission box, the transmission box further comprises a locking mechanism, the locking mechanism comprises a stop piece, a fifth guide post, a sixth guide groove and a lock cylinder mounting position arranged on the housing, the stop piece is slidably connected with the housing, the sixth guide groove is formed in the housing, the fifth guide post is fixedly connected with the stop piece, the fifth guide post is arranged in the sixth guide groove and can move relative to the sixth guide groove, a limiting groove mutually matched with the stop piece is formed in the movable piece, and the lock cylinder mounting position is used for mounting a lock cylinder for driving the stop piece to move;

when the locking mechanism is in a locking state, the stop piece moves into the limiting groove along the sixth guide groove, and when the locking mechanism is in an unlocking state, the stop piece is far away from the limiting groove.

The utility model provides a push-pull type door and window, its includes frame, the fan body, handle, loose pulley assembly and as above transmission box, the fan body install in the frame, handle, transmission box and loose pulley assembly all install on the fan body, the handle with transmission box transmission is connected, transmission box with loose pulley assembly transmission is connected, the handle is used for the drive transmission box moves, transmission box basis the motion control of handle loose pulley assembly is in the lifting state, and under the lifting state loose pulley assembly is right the fan body forms the support, makes the fan body can be followed the length direction of frame freely removes.

Compared with the prior art, the invention has the following beneficial effects: because the driving component capable of automatically resetting is arranged on the transmission box, the handle can automatically rotate and reset after the door and the window are operated and the torque force acting on the handle is removed, and then avoided in the push-and-pull door because the transmission box unblock back drive handle fast gyration under the action of gravity and probably hit and hurt the human body, the security when having improved transmission box and plug-type door and window use promptly.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a schematic view of the overall structure of the transmission case of the present invention;

FIG. 2 is a schematic structural view of the transmission box in a state to be triggered according to the present invention;

FIG. 3 is a partially exploded view of the transmission case of the present invention;

FIG. 4 is a schematic cross-sectional view of the transmission case of the present invention;

FIG. 5 is a schematic structural view of another embodiment of the transmission case of the present invention;

FIG. 6 is a schematic view of the overall structure of the driving pulley block according to the present invention;

FIG. 7 is an exploded view of the drive pulley block of the present invention;

FIG. 8 is a schematic view of the overall structure of the driven pulley block of the present invention;

fig. 9 is an exploded view of the driven pulley block of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and specific examples so that those skilled in the art can better understand the present invention and can implement the present invention, but the examples are not intended to limit the present invention, and in the present examples, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like as used herein are for illustrative purposes only.

As shown in fig. 1 to 9, the present embodiment provides a push-pull window, which includes an outer frame (not shown), a sash body (not shown), a handle (not shown), a transmission case 01 and a pulley assembly 02; the outer frame forms a fan body frame, and a track for the fan body to move is arranged in the frame, namely, the fan body is arranged in the outer frame; certainly, the outer frame may not be used directly, that is, the outer frame is manufactured on a building (such as a wall), and at this time, a track for the fan to move is directly laid in the outer frame of the building; the handle is a handle arranged on the door or the window and controls the opening or the closing of the door or the window through the handle. The handle, transmission box 01 and loose pulley assembly 02 all install on the fan body, the handle is connected with transmission box 01 transmission, transmission box 01 is connected with loose pulley assembly 02 transmission, the handle passes through the transmission shaft, drive transmission box 01 and move if the square shaft, transmission box 01 then controls and makes loose pulley assembly 02 be in the lifting state according to the action of handle, and sliding pulley assembly 02 forms the support to the fan body under the lifting state, specifically, loose pulley assembly 02 in this embodiment installs the bottom at the fan body, the pulley in lifting state sliding pulley assembly 02 stretches out or outstanding for the fan body this moment and then forms the support to the fan body, namely, loose pulley assembly will be the fan body with the frame or the fan body with the orbital conversion stiction between the frame track of frame into rolling friction, and then make the fan body can be along the frame or be located the orbital flexible left and right sides removal in the frame, namely, make the fan body can freely move along the length direction of frame in order to realize opening or half-closing of door and window. Further, the transmission box 01 is further provided with a trigger mechanism 03, one end of the trigger mechanism 03 is in transmission connection with the transmission box 01, the other end of the trigger mechanism 03 extends out of the transmission box 01, when the side edge of the door window in the longitudinal direction of the sash body is abutted or touched with the side edge of the outer frame (closed state), the trigger mechanism 03 can be extruded and triggered, and at the moment, the trigger mechanism 03 relieves the lifting state of the pulley assembly 02; at this moment, under the effect of gravity, the fan body then can directly fall on in the frame or the fan body then can directly fall on the track in the frame, and then makes fan body and frame form the static friction to make the fan body can not move for the frame in a flexible way, promptly, avoided door and window's the fan body because of the striking with the frame make the fan body take place the problem of kick-backing for the edge of frame, and then be convenient for the smooth closure of fan body. Further, when the door and window sash stops at any position in the outer frame or on the track, the triggering mechanism 03 can be triggered manually, that is, the triggering mechanism 03 is pressed and started by hands, so that the triggering mechanism 03 releases the lifting state of the pulley assembly 02 relative to the sash, for example, the door moving sash can be in a smaller opening degree as required, so as to meet the requirements of indoor and outdoor ventilation or air exchange, and prevent the household young children from easily moving the door sash to enter and exit the balcony.

As shown in the drawings, in a preferred embodiment, the transmission box 01 includes a housing 05, a driving assembly 06 and a moving part 07, the moving part 07 is installed in the housing 05, and the moving part 07 is slidably connected to the housing 05, that is, the moving part 07 is movable relative to the housing 05, the driving assembly 06 is rotatably connected to the housing 05, the driving assembly 06 is configured to be connected to an external handle, the driving assembly 06 rotates under a torque force of the handle and drives the moving part to move relative to the housing 05, the driving assembly 06 includes an elastic element 22, when the handle rotates from a first angular position to a second angular position relative to the housing 05, the driving assembly 06 is driven to move to a locking position, the moving part is locked relative to the housing 05, the elastic element 22 is compressed, after the torque force is removed, the elastic element 22 of the driving assembly 06 drives the handle to reset from the second angular position to the first angular position relative to the housing 05, a connecting portion is provided at one end or two ends of the moving part, the connecting portion is configured to connect and drive an external device to operate, the connecting portion is provided at one end or two ends of the connecting portion 07, and is configured to connect and drive the external device to operate. Furthermore, because the transmission box 01 is provided with the driving component 06 capable of self-resetting, the handle can be automatically rotated and reset after the door and the window are operated and the torque force acted on the handle is removed, and further, the phenomenon that the handle is driven to rotate quickly under the action of gravity after the transmission box is unlocked in the sliding door, so that the handle can hit and hurt a human body is avoided.

As shown in fig. 1 to 5, in a preferred embodiment, the transmission case 01 includes a housing 05, a driving element 06, a movable element 07, and a triggering mechanism 03, wherein the movable element 07 is slidably connected to the housing 05, the driving element 06 is rotatably connected to the housing 05, the driving element 06 is drivingly connected to the movable element 07, and the driving element 06 is configured to drive the movable element 07 to move along a length direction of the housing 05, so that the movable element 07 cooperates with the triggering mechanism 03 and/or the latch element 04 to finally implement an operation of the transmission case. The device further comprises a trigger mechanism 03, wherein the trigger mechanism 03 comprises a trigger block 08, the trigger block 08 is installed in the shell 05, the moving part 07 is movably connected with the trigger block 08, and when the driving component 06 drives the moving part 07 to move upwards to a locking position relative to the shell 05 and the trigger block 08, the trigger block 08 moves outwards and translates relative to the moving part 07 and the shell 05, extends out of the shell 05, supports the moving part 07 and locks the moving part 07; when the trigger block 08 is triggered by an external force, the trigger block 08 translates inwards relative to the movable element 07 and the shell 05 and retracts into the shell 05, and when the trigger block 08 retracts to a preset position, the movable element 07 moves downwards relative to the shell 05 and the trigger block 08 under the action of gravity and resets.

Further, the triggering mechanism 03 further includes an elastic member 09, a first guide post 10, and a first guide groove 11 and a second guide groove 12 disposed on the movable member 07; in this embodiment, an included angle of 90 degrees is formed between the first guide groove 11 and the second guide groove 12, and one end of the first guide groove 11 is communicated with one end of the second guide groove 12, that is, the first guide groove 11 and the second guide groove 12 together form an L-shaped guide groove, the trigger block 08 is slidably connected with the movable element 07 and/or the housing 05, the first guide post 10 and the trigger block 08 form a fixed connection by riveting, welding or interference fit, the first guide post 10 is disposed in the first guide groove 11 or the second guide groove 12 and can slide along the first guide groove 11 and/or the second guide groove 12, one end of the elastic element 09 abuts against the housing 05, and the other end abuts against the trigger block 08, where the elastic element 09 is a spring in this embodiment.

Further, when the transmission box 01 is in the first state (corresponding to the pulley assembly 02, the transmission box makes the pulley assembly in the lifted state), the elastic member 09 pushes or ejects the trigger block 08 out of the housing 05 under the elastic force, and the first guide post 10 slides into the first guide groove 11; when the transmission case 01 is in the second state (relative to the pulley assembly 02, the transmission case releases the lifting state of the pulley assembly 02), the trigger block 08 retracts into the housing 05 and compresses the elastic member 09, and the first guide post 10 slides into the second guide groove 12. Further, a second guide post 13 is further arranged on the trigger block 08, a third guide groove 14 is further arranged on the housing 05, the second guide post 13 is fixedly connected with the trigger block 08, the second guide post 13 is arranged in the third guide groove 14 and can slide relative to the third guide groove 14, and the third guide groove 14 is parallel to the first guide groove 11, so that the trigger block 08 can reciprocate relative to the radial direction of the axis of the length direction of the housing. Further, the longitudinal axis of the first guide groove 11 is parallel to the longitudinal axis of the trigger block 08, and the longitudinal axis of the second guide groove 12 is parallel to the longitudinal axis of the movable element 07 or the housing 05. The seventh guide groove 53 and the sixth guide column 54 which is matched with the seventh guide groove 53 are further respectively arranged at two ends of the movable member 07 in the length direction, the sixth guide column 54 is arranged in the seventh guide groove 53, the sixth guide column 54 is fixed to the housing 05 through riveting, the seventh guide groove 53 is parallel to the axis of the movable member 07 in the length direction, that is, when the transmission box is longitudinally arranged, the sixth guide column 54 is matched with the seventh guide groove 53, so that the movable member 07 reciprocates up and down relative to the housing 07, or the movable member 07 reciprocates relative to the axis of the housing 07 in the length direction.

Further, when the door and window is in the initial state, the transmission box is longitudinally arranged, and at this time, transmission is performed through the handle, that is, when the driving assembly 06 is driven to move, the driving assembly 06 drives the moving member 07 to slide (slide upward) along the axis of the length direction of the housing, at this time, the second guide groove 12 slides relative to the first guide post 10 until the first guide post 10 corresponds to the first guide groove 11, at this time, because the axis of the first guide groove 11 is parallel to the third guide groove 14 and is no longer constrained by the second guide groove 12, the trigger block 08 is pushed out from the housing 05 under the elastic force of the elastic member 09 (the first state), and at the same time, because the axis of the first guide groove 11 and the movement axis of the 07 form a 90-degree flat angle, at this time, the first guide post can limit the movement of the moving member, that is, the lifting pulley state of the moving member 02 relative to the fan body is maintained. Similarly, when the sash body of the door or window is closed, the sash body touches the outer frame and presses the trigger block 08, or the trigger block 08 is directly pressed by the hand, the trigger block 08 overcomes the elastic acting force of the elastic piece 09 and retracts towards the shell 05, and can drive the first guide column 10 to move along the first guide groove 11 until the first guide column 10 corresponds to the second guide groove 12; at this time, the pulley assembly 02 generates a downward pulling force on the movable member 07 due to the gravity action from the fan body, so that after the first guide post 10 corresponds to the second guide groove 12, the movable member 07 moves downward relative to the housing 05 under the pulling force, and the lifting state of the pulley assembly 02 relative to the fan body is released, so that the fan body directly falls on the outer frame or the fan directly falls on the rail and forms static friction with the rail, that is, the fan body cannot move flexibly relative to the outer frame.

As shown in fig. 1-4, in a preferred embodiment, the transmission case 01 is further provided with a latch bolt assembly 04, when the side edge of the fan body touches the side edge of the outer frame, the trigger mechanism 03 and the latch bolt assembly 04 are activated, the trigger mechanism 03 releases the lifting state of the pulley assembly 02, and the latch bolt assembly 04 extends out of the fan body or the transmission case 01 and is connected with the outer frame; when the transmission box 01 controls the pulley assembly 02 to be in a lifting state according to the action of the handle, the bolt assembly 04 is retracted into the transmission box 01; further, when the sash body of the door and window is in a closed state relative to the outer frame and needs to be locked with the outer frame, the lock tongue is used for locking the sash body and the outer frame; or, set up the lock body on the frame, the lock body mutually supports with spring bolt subassembly 04 and realizes the locking between the fan body and the frame, promptly, the lock body forms fixed connection with spring bolt subassembly 04, and then realizes the locking state between fan body and the frame.

Specifically, in this embodiment, the latch bolt assembly 04 includes the latch bolt body 15, the latch bolt body 15 is installed in casing 05, latch bolt body 15 and moving part 07 and casing 05 swing joint, when the drive assembly drives moving part 07 for casing 05 and trigger block 08 upward movement, moving part 07 drives latch bolt body 15 to retract inwards in the casing 05, when trigger block 08 is triggered by external force and retracts to the preset position, moving part 07 moves downwards relative to casing 05 and trigger block 08 under the action of gravity, drives latch bolt body 15 to move outwards simultaneously, stretches out outside casing 05. Further, the locking bolt assembly 04 further includes a third guide post 16, a fourth guide post 17, a fourth guide groove 18 and a fifth guide groove 19, the locking bolt body 15 is slidably connected to the movable member 07 and/or the housing 05, the fourth guide groove 18 is disposed on the locking bolt body 15, the third guide post 16 is fixedly connected to the movable member 07 and is disposed in the fourth guide groove 18, the fifth guide groove 19 is disposed on the housing 05, the fourth guide post 17 is fixedly connected to the locking bolt body 15 and is disposed in the fifth guide groove 19, the fifth guide groove 19 is parallel to the first guide groove 11 or the third guide groove 14, the fourth guide groove 18 is disposed in an inclined manner with respect to the axial line of the locking bolt body 15 in the length direction, for example, the fourth guide groove 18 forms an included angle of 40 degrees with respect to the axial line of the locking bolt body 15 in the length direction; further, when the movable element 07 moves up and down, the third guiding column 16 is driven to move up and down, and the movement track of the guiding column 16 forms an included angle of, for example, 40 degrees with the axis of the fourth guiding groove 18, and meanwhile, due to the fourth guiding column 17 and the fifth guiding groove 19 cooperating therewith, the moving up and down of the movable element 07 forces the bolt body 15 to extend or retract relative to the housing 05.

Further, in this embodiment, the retractable latch body 15 can further eliminate the swing of the sash, specifically, in the process of closing the door and window, especially, heavy doors and windows often swing elastically due to the collision between the sash and the outer frame, and especially, the middle of the longitudinal axis of the sash of the door and window is more obvious, and the transmission box is often installed in the middle of the sash, so that when the sash touches the outer frame, the trigger mechanism 03 releases the lifting state of the pulley assembly 02, and the latch assembly 04 is simultaneously activated, that is, the latch body 15 extends into the outer frame, thereby slowing down or eliminating the swing of the sash due to the collision with the outer frame. Furthermore, the lock tongue body 15 in this embodiment is provided with a groove, and the outer frame is further provided with a lock body which is matched with the lock tongue assembly 04, namely, the lock body is clamped with the groove on the bolt body 15, so that the sector is locked with the outer frame.

As shown in fig. 2-5, in a preferred embodiment, the driving assembly 06 further includes a base 20, a driving shaft 21 and a driven wheel 23, the elastic element 22 in this embodiment is a torsion spring, the driving shaft 21 penetrates the housing 05 and can rotate relative to the housing 05, the base 20, the driven wheel 23 and the elastic element 22 are all sleeved on the driving shaft 21, the driving shaft 21 and the driven wheel 23 can rotate relative to the base 20, and the base 20 and the housing 05 are fixed by riveting or bolts. Further, a first limit block 24 is fixed on the base 20, a second limit block 25 is fixed on the driving shaft 21, a third limit block 26 is fixed on the driven wheel 23, the first limit block 24, the second limit block 25 and the third limit block 26 are arranged in the radial direction relative to the driving shaft 21, one end of the elastic element 22 is connected with the base 20, and the other end is connected with the driving shaft 21; when the transmission box 01 is in the first state, the first limit block 24 is located between the second limit block 25 and the third limit block 26; when the transmission case 01 is in the first state, the second stopper 25 is located between the first stopper 24 and the third stopper 26. Through the mutual matching of the base 20, the driving shaft 21, the elastic element 22, the driven wheel 23, the first limiting block fixed on the base 20, the second limiting block 25 on the driving shaft 21 and the third limiting block 26 on the driven wheel 23, the handle connected with the transmission box can be automatically reset after rotating by a corresponding angle.

Specifically, because the first limit block 24 is fixed to the base 20 and the driving shaft 21 is provided with the second limit block 25, the rotation angle of the driving shaft 21 relative to the base 20 does not exceed 360 degrees, and further, because the driven wheel 23 is provided with the third limit block 26, when the driving shaft 21 rotates, the third limit block is shifted by the second limit block 25 and the driven wheel 23 is driven to rotate relative to the base 20; further, after the driven part 23 rotates to a certain angle, the transmission cassette can be moved to and kept in a first state (driving and enabling the pulley assembly 02 to be in a lifting state relative to the fan body), at the moment, after the torque force acting on the handle is removed by the hand or when the torque force acting on the handle is smaller than the elastic torque force of the elastic element 22, the driving shaft 21 is driven to revolve under the elastic torque force of the elastic element 22, namely, the handle of the handle connected with the driving shaft 21 is driven to revolve and return, namely, the second limiting block 25 on the driving shaft 21 abuts against the first limiting block 24 on the base 20, and then the automatic return of the handle is formed; through setting up the drive assembly 06 that can make the automatic playback of handle, can avoid the fan body when relieving the lifting state, the fan body drives handle fast circle round and hit the human body and probably cause the injury under the effect of gravity.

As shown in fig. 5, in an embodiment, the driving assembly 06 further includes a first connecting rod 27, a first end of the first connecting rod 27 is hinged to the movable member 07, a second end of the first connecting rod 27 is hinged to the driven wheel 23, and a hinge point of the first connecting rod 27 and the driven wheel 23 is offset from an axial line of the driven wheel 23, that is, the movable member 07 is driven to reciprocate relative to the housing 05 by the cooperation of the eccentric driven wheel 23 and the first connecting rod 27.

In another embodiment, as shown in fig. 3, the driving assembly 06 further includes a rack 28, the rack 28 is fixed to the movable member 07 by riveting or bolting, the driven wheel 23 is a gear or a sector gear, and the driven wheel 23 is engaged with the rack 28, that is, the movable member 07 is driven to reciprocate relative to the housing 05 by the cooperation of the gear 23 and the rack 28. Further, still be provided with shaft hole 29 on the drive shaft 21, shaft hole 29 runs through drive shaft 21, and shaft hole 29 is polygon or internal spline, and shaft hole 29 in this embodiment is square shaft hole, carries out the transmission through the square shaft between the handle of handle and the transmission box promptly.

As shown in fig. 2 to 4, in a preferred embodiment, the transmission case 01 further includes a locking mechanism, the locking mechanism includes a stop member 30, a fifth guide column 31, a sixth guide slot 32, and a key cylinder mounting position 33 disposed on the housing 05, the stop member 30 is slidably connected to the housing 05, the sixth guide slot 32 is opened on the housing 05, the fifth guide column 31 is fixedly connected to the stop member 30, the fifth guide column 31 is disposed in the sixth guide slot 32 and can move relative to the sixth guide slot 32, a limit slot 34 is disposed on the movable member 07 and is matched with the stop member 30, and the key cylinder mounting position 33 is used for mounting a key cylinder for driving the stop member 30 to move; when the locking mechanism is in the locked state, the stop member 30 moves along the sixth guide groove 32 into the limit groove 34, and when the locking mechanism is in the unlocked state, the stop member 30 is away from the limit groove 34. Specifically, when the locking mechanism is in the locked state, the transmission case cannot be operated, for example, the transmission case cannot be operated and the pulley assembly 02 is in the lifted state, and for example, when the locking mechanism is in the locked state, the lifted state of the pulley assembly 02 is maintained.

As shown in fig. 4 to 5, in a preferred embodiment, the transmission case 01 further includes an adjusting member connected to one or both ends of the movable member 07, and the adjusting member is used to adjust a transmission distance between the transmission case 01 and the pulley assembly 02. Further, the adjusting member includes a first pull rod 35, a second pull rod 36, and a connecting member 37, wherein one end of each of the first pull rod 35 and the second pull rod 36 is fixedly connected to the connecting member 37, in this embodiment, one end of each of the first pull rod 35 and the second pull rod 36 is connected to the connecting member 37 through a thread, or the connecting member 37 is respectively sleeved on the end of each of the first pull rod 35 and the second pull rod 36, and meanwhile, a jackscrew is also disposed on the connecting member 37, that is, after the first pull rod 35 and the second pull rod 36 are connected to the connecting member 37, the first pull rod 35 and the second pull rod 36 are both fixedly connected to the connecting member 37 through the jackscrew; the other end of the first pull rod 35 is screwed with the movable element 07 through threads, the other end of the second pull rod 36 is screwed with the sliding assembly 02 through threads, and further, the first pull rod 35 is provided with a forward-rotation thread, and the second pull rod 36 is provided with a reverse-rotation thread.

Particularly, because to the door and window of different specifications, transmission distance between transmission box and the loose pulley assembly 02 is inconsistent, consequently, accomplish transmission box and loose pulley assembly 02's the back of being connected when the regulating part, often still need come transmission distance between transmission box and the loose pulley assembly 02 to finely tune through the regulating part to guarantee reliable opening or opening the precision of door and window, like realize door and window and open and close the in-process, the precision of the handle pivoted angle of handle (if the adjustment handle is in the horizontality). Further, in another embodiment, the adjusting member includes a first pull rod 35 and a connecting member 37, one end of the first pull rod 35 is provided with a forward-rotation thread, a second end of the first pull rod 35 is provided with a backward-rotation thread, and the connecting member 37 is detachably sleeved on and fixed to the first pull rod 35, that is, only one pull rod is used at this time, and the forward-rotation thread and the backward-rotation thread are respectively disposed at two ends of the pull rod. Further, the connecting member 37 is coaxial with the first pull rod 35 or the second pull rod 36, the connecting member 37 is polygonal, such as hexagonal, and/or a plurality of holes 38 are disposed in a circumferential direction of the connecting member 37, and the holes 38 are disposed relative to a radial direction of the connecting member 37. Specifically, the connecting member 37 arranged in a polygonal shape may be capable of being rotated by a wrench to drive the first pull rod 35 and the second pull rod 36, or a rod member is inserted into the hole 38 of the connecting member 37 to drive the first pull rod 35 and the second pull rod 36 to rotate, and meanwhile, since the first pull rod 35 and the second pull rod 36 are respectively provided with the forward and reverse threads, when the connecting member 37 drives the first pull rod 35 and the second pull rod 36 to rotate and adjust, the transmission case and the pulley assembly 02 can synchronously move towards each other or synchronously move away from each other, relative to the axial direction of the first pull rod 35 or the second pull rod 36.

As shown in fig. 6-7, in a preferred embodiment, the pulley assembly 02 includes a driving pulley block and a driven pulley block 48, wherein the driving pulley block includes a first roller 39, a first bracket 40, a second bracket 41, a second link 42 and a third link 43, the second link 42 and the third link 43 are spaced apart, first ends of the second link 42 and the third link 43 are respectively connected with the second bracket 41 through a pin, second ends of the second link 42 and the third link 43 are respectively connected with the first bracket 40 through a pin, the second links are parallel to the third link 43, the first roller 39 is connected with the first bracket 40, wherein the first roller 39 may be one more, such as 2, 3 or more, and is arranged along a length direction of the first bracket 40, i.e., the plurality of rollers 39 are provided to improve a bearing capacity of the pulley assembly.

Furthermore, the hinge points of the second connecting rod 42 and the third connecting rod 43 on the first bracket 40 and the second bracket 41, and the hinge points of the second connecting rod 42 and the third connecting rod 43 on the first bracket 40 and the second bracket 41 together form a parallelogram, so that the first roller 39 connected to the first bracket 40 can be adjusted up and down relative to the fan body of the door leaf according to the motion characteristics of the quadrilateral mechanism (the relative rods are always parallel, and the angular displacement, the angular velocity and the angular acceleration of the two connecting rods are always equal); further, the sliding friction generated by the existence of the guide groove in the prior art is eliminated, namely, the rotating friction is generated only at the hinge point in the part of the pulley assembly, so that the resistance of the pulley assembly in action is reduced, and the rotating torque of the handle when the push-pull door window is opened is further reduced. Further, the third link 43 is further provided with a driving arm 44, a first end of the driving arm 44 is integrally formed with the third link 43, a second end of the driving arm 44 extends away from the third link 43, and the driving arm 44 is located at one end of the second bracket 41, and the driving arm 44 is used for driving the second bracket 41 and the first bracket 40 to move relatively with respect to a radial direction of the length axis of the first bracket 40 and the second bracket 41.

Further, the length of the driving arm 44 is greater than that of the third connecting rod 43, so that a labor-saving lever is formed, and the driving moment of the pulley assembly 02 caused by the transmission box is reduced. The driving arm 44 is configured to drive the first bracket 40 to move relative to the second bracket 41, so that the first roller 39 is in a first state or a second state (in a retracted state or a lifted state relative to the sash of the door or window), and an included angle between the first bracket 40 and the second link 42 when the first roller 39 is in the first state is smaller than an included angle between the first bracket 40 and the second link 42 when the first roller 39 is in the first state. Specifically, the second link 42 and the third link 43 are respectively connected to the first bracket 40 and the second bracket 41 to form a parallelogram, and synchronous movement of two opposite sides can be realized according to the nature of the parallelogram, and further, the arm of force of the driving arm 44 can be used as a labor-saving lever, so that a relatively small moment can be output from the transmission box to enable the driving pulley to be in a lifting state, and further, the lengths of the driving arm 44 and the third link 43 are maintained in a proper proportion by calculation, for example, the swing height of the driving arm is 13MM, and the first bracket 40 drives the first roller 39 to move by a distance of 5MM relative to the second bracket 41.

As shown in fig. 7, in a preferred embodiment, the device further includes a third bracket 45, a third pull rod 46 and a slide block 47, the third bracket 45 forms a 90-degree angle with the second bracket 41 and is fixed, the slide block 47 is slidably connected with the third bracket 45, one end of the third pull rod 46 is connected with the slide block 47, the other end of the third pull rod is connected with the second end of the driving force arm 44, and the slide block 47 is used for connecting the first pull rod 35 or the second pull rod 36. Specifically, the third support, the third pull rod 46 and the matching with the sliding block 47 can facilitate the installation of the driving pulley block in the fan body, and the 90-degree angle formed by the third support 45 and the second support 41 can facilitate the accurate positioning of the driving pulley block at the corner of the fan body, or ensure the free swinging amount of the tail end of the driving arm 44. Further, a seventh guide post 55 is further arranged on the slider 47, the seventh guide post 55 and the slider 47 are fixed by riveting or bolts, an eighth guide groove 56 matched with the seventh guide post 55 is formed in the third bracket 45, and the seventh guide post 55 is arranged in the eighth guide groove 56; specifically, the engagement of the seventh guide post 55 and the eighth guide groove 56 guides the movement direction of the slider 47 relative to the third bracket 45, that is, moves the slider 47 relative to the axial direction of the third bracket 45.

As shown, in the preferred embodiment, the hinge point of the third pull rod 46 and the driving arm 44, and the hinge point of the second link 42 or the third link 43 and the first bracket 40 and the second bracket 41 form a triangle together; when the first roller 39 is in the first state (the retracted state), the hinge point of the second link 42 or the third link 43 with the first bracket 40, and the hinge point of the third link 43 with the driving arm 44 are lower than the hinge point of the second link 42 or the third link 43 with the second bracket 41; specifically, when the hinge point of the third link 46 and the driving arm 44 is lowered, the amount of swing of the driving arm 44 can be reduced relative to the case where the driving arm 44 and the second link 42 or the third link 43 form a straight line, so that the structure of the pulley assembly can be relatively more compact.

As shown in the figures, in the preferred embodiment, the first bracket 40 and the second bracket 41 are both bent into a U shape, and a first accommodating cavity 57 and a second accommodating cavity 58 are respectively arranged in the first bracket 40 and the second bracket 41; the first roller is disposed in the first receiving cavity 57 of the first bracket 40, and the first bracket 40 is disposed in the second receiving cavity 58 of the second bracket 41. Further, a first receiving groove 60 is further formed at one side of the first bracket 40 in the width direction, when the first roller 39 is in the first state (the contracted state), a hinge point of the second bracket 41 and the second link 42 or the third link 43 is disposed in the first receiving groove 60, and when the first roller 39 is in the second state (the lifted state), the hinge point of the second bracket 41 and the second link 42 or the third link 43 is separated from the first receiving groove 60. Specifically, the first bracket 40 and the second bracket 41 are nested together, so that the overall structure of the pulley assembly is relatively more compact, and the overall structural strength of the pulley assembly is relatively higher.

Further, the support device further comprises a support gasket 59, one surface of the support gasket 59 is fixed on the first bracket 40 and/or the sliding block 47 in a clamping manner, the other surface of the support gasket 59 is abutted against the inner wall of the second bracket 41 and/or the third bracket 45 respectively, and the support gasket 59 can slide relative to the inner wall of the second bracket 41 and/or the third bracket 45; furthermore, a supporting gasket 59 is also arranged between the housing 05 and the movable member 07, one surface of the supporting gasket 59 is fixedly clamped with the movable member 07, the other surface of the supporting gasket 59 abuts against the inner wall of the housing 05, and the supporting gasket 59 can slide relative to the housing 05. The supporting pad 59 in this embodiment may be made of teflon, and specifically, the supporting pad 59 serves to reduce friction between the first bracket 40 and the second bracket 41 and between the third bracket 45 and the slider 47, i.e., to reduce friction force increased by surface contact between the first bracket 40 and the second bracket 41; as another example, the support pad 59 may reduce frictional resistance as the moveable member 07 moves relative to the housing 05.

As shown in fig. 8-9, in a preferred embodiment, the pulley assembly 02 further includes a driven pulley block 48, the driven pulley block 48 is fixed with the fan body through a bolt, the driving pulley block and the driven pulley block 48 are arranged at intervals, and the driving pulley block is in transmission connection with the driven pulley block 48; when the driving pulley block cannot well support the fan body, and if the length of the driving pulley block cannot stably support the bottom of the fan body of the door and window, one or more driven pulley blocks 48 can be used to be matched with the driving pulley block to form effective support for the fan body; further, when the transmission box 01 controls the driving pulley block to be in a lifting state according to the action of the handle, the driven pulley block 48 is linked with the driving pulley block and is in the lifting state.

As shown in fig. 8-9, in a preferred embodiment, the driven pulley block 48 comprises a fourth bracket 49, a fifth bracket 50, a second roller 51 and a fourth link 52, one end of the fourth link 52 is hinged to the fourth bracket 49, the other end of the fourth link 52 is hinged to the fifth bracket 50, and the second roller 51 is connected to the fifth bracket 50; the fifth bracket 50 is configured to receive an external force and drive the second roller 51 to move relative to the fourth bracket 49, so that the second roller 51 is in a first state (a retracted state) or a second state (a lifted state), and an included angle between the fourth bracket 49 and the fourth link 52 when the second roller 51 is in the first state is smaller than an included angle between the fourth bracket 49 and the fourth link 52 when the second roller 51 is in the second state. Further, in an embodiment, two second rollers 51 are disposed and spaced apart from each other in a length direction of the fifth bracket 50, only one fourth connecting rod 52 is used, the fourth connecting rod 52 is located between the second rollers 51, when the fifth bracket 50 moves relative to the fourth bracket 49 (the fourth bracket 49 is fixed on the sash body) under the driving of the driving pulley block, at this time, the fourth connecting rod 52 hinged between the fourth bracket 49 and the fifth bracket 50 and disposed obliquely forms a support so that the second rollers 51 form a support relative to the sash body of the door or window, and the sash body of the door or window can move flexibly. Of course, the number of the second rollers 51 may be more than 3, 4, 5 according to the requirement, so that the driven pulley 48 can bear the weight load of the heavy door and window sash, and when the number of the second rollers 51 is more than 3, the connection points of the second rollers 51 and the fifth bracket 50 are located on the same straight line, and the straight line is parallel to the length axis of the fifth bracket 50.

Further, in another embodiment, two fourth connecting rods 52 are provided, and in this case, in order to reduce the biasing moment applied to the driven pulley block 48, the second roller 51 is located between the two fourth connecting rods 52; further, when the hinge point of the fourth bracket 49 and the fourth link 52, the hinge point of the fifth bracket 50 and the fourth link 52 together form a parallelogram, so that the second roller 51 can be adjusted to be lifted and lowered relative to the sash of the door or window according to the motion characteristics of the quadrilateral mechanism (the relative rods are always kept parallel and the angular displacement, angular velocity and angular acceleration of the two links are always equal), that is, the parallel motion of the fifth bracket 50 relative to the fourth bracket 49; of course, if more than 2 second rollers 51 are provided, two fourth links 52 may be disposed between the two second rollers 51, or the second rollers 51 and the fourth links 52 may be disposed alternately. Specifically, when the driven pulley block 48 is in the lifted state, the driving pulley block drives the fifth bracket 50 to shift relative to the fourth bracket 49, the fourth link 52 connecting the fifth bracket 50 and the fourth bracket 49 rotates relative to the fifth bracket 50 and the fourth bracket 49, respectively, and the telescopic state, i.e., the lifted state or the contracted state, of the second roller 51 relative to the fourth bracket 49 is realized through the size of the deflection angle of the axis of the fourth link 52. Further, the driving pulley block and the driven pulley block 48 are fixed at the bottom of the fan body, the driving pulley block and the driven pulley block 48 are arranged at intervals, when the transmission box 01 controls the driving pulley block to be in a lifting state according to the action of the handle, the driven pulley block 48 is linked with the driving pulley block and is in the lifting state, namely the driving pulley block and the driven pulley block 48 realize synchronous action under the driving of the transmission box.

As shown in fig. 8-9, in the preferred embodiment, the fourth bracket 49 and the fifth bracket 50 are both U-shaped, wherein a third accommodating cavity 61 is formed in the fourth bracket 49, a fourth accommodating cavity 62 is formed in the fifth bracket 50, the second roller 51 is located in the fourth accommodating cavity 62, and the fifth bracket 50 is located in the third accommodating cavity 61. Nesting the fifth bracket 50 within the fourth bracket 49 may, on the one hand, result in a relatively more compact structure of the driven pulley and, on the other hand, may result in a relatively stronger overall structure of the driven pulley and 48. Further, a second receiving groove 63 is further formed in one side of the fifth bracket 50 in the width direction, when the second roller 51 is in the first state, a hinge point of the fourth connecting rod and the fourth bracket is disposed in the second receiving groove 63, and when the second roller 51 is in the second state, a hinge point of the fourth connecting rod 52 and the fourth bracket 49 is separated from the second receiving groove 63 or at least partially disposed outside the second receiving groove. The provision of the second receiving groove 63 makes it possible to make the volume of the set of driven pulleys 48 in the contracted state relatively more compact.

As shown in fig. 8-9, in a preferred embodiment, a supporting pad 59 is further disposed between the fourth bracket 49 and the fifth bracket 50, one surface of the supporting pad 59 is fixed to the fifth bracket 50 by clamping, and the other surface of the supporting pad 59 is abutted against the fourth bracket 49 and can slide relative to the fourth bracket 49. The support pad 59 in this embodiment may be teflon, and in particular, the support pad 59 between the fourth bracket 49 and the fifth bracket 50 may reduce friction when the fifth bracket 50 moves relative to the fourth bracket 49.

As shown in fig. 8-9, in a preferred embodiment, a reinforcing rib 64 is further disposed on the fifth bracket 50 relative to the length direction of the fifth bracket 50, the reinforcing rib 64 in this embodiment is formed by stamping, and the reinforcing rib 64 can further enhance the structural rigidity of the fifth bracket 50 and improve the deformation resistance of the driven pulley block under stress. Furthermore, first plugs 65 are further arranged at two ends of the fourth support 49, the first plugs are placed in the third accommodating cavity 61, and the first plugs 65 and the fourth support 49 are fixed through riveting or bolts. A second plug 66 is further disposed at one end or two ends of the fifth support 50, the second plug 66 is disposed in the fourth accommodating cavity 62, and the second plug 66 and the fifth support 50 are fixed by bolts or riveting. The first plug 65 and the second plug 66 can further improve the structural rigidity of the driven pulley block.

Compared with the prior art, the invention has the following beneficial effects: because the driving component capable of automatically resetting is arranged on the transmission box, the handle can automatically rotate and reset after the door and the window are operated and the torque force acting on the handle is removed, and then avoided in the push-and-pull door because the transmission box unblock back drive handle fast gyration under the action of gravity and probably hit and hurt the human body, the security when having improved transmission box and plug-type door and window use promptly.

In this specification, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature in direct contact with the first or second feature, or the first and second features may be in indirect contact via intermediate media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, reference to the description of the terms "preferred embodiment," "yet another embodiment," "other embodiments," or "specific examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (10)

1. A kind of drive box, its characteristic is: including casing, drive assembly and moving part, the moving part with casing sliding connection, drive assembly with the casing rotates to be connected, drive assembly with the moving part transmission is connected, drive assembly is used for being connected with outside handle, drive assembly rotates and drives under the torsion effect of handle the moving part for the casing removes, drive assembly includes elastic element, the handle for when the casing rotates second angular position by first angular position, drive assembly drive the moving part removes to the locking position, just the moving part for the casing locking, simultaneously elastic element is compressed, after removing torsion, drive assembly's elastic element drives the handle for the casing resets to first angular position by second angular position, the one end or both ends department of moving part are provided with connecting portion, connecting portion are used for connecting and drive external equipment and move.

2. The drive cassette of claim 1, wherein: the trigger mechanism comprises a trigger block, the trigger block is installed in the shell, the movable piece is movably connected with the trigger block, and when the driving assembly drives the movable piece to move upwards to the locking position relative to the shell and the trigger block, the trigger block moves outwards relative to the movable piece and the shell and extends out of the shell, supports the movable piece and locks the movable piece; when the trigger block is triggered by external force, the trigger block translates inwards relative to the movable piece and the shell and retracts into the shell, and when the trigger block retracts to a preset position, the movable piece moves downwards relative to the shell and the trigger block under the action of gravity and resets.

3. The drive cassette of claim 2, wherein: the transmission box still includes the spring bolt body, the spring bolt body is installed in the casing, spring bolt body and moving part and casing swing joint, the drive assembly drive the moving part for during casing and the upward movement of trigger block, the moving part drives the spring bolt body inwards retracts in the casing, when trigger block receives external force to trigger the retraction to preset the position, the moving part is relative to casing and trigger block downstream under the action of gravity, drives simultaneously the spring bolt body outwards removes, stretches out outside the casing.

4. A drive cassette according to any one of claims 1-3, wherein: the driving assembly further comprises a base, a driving shaft and a driven wheel, the driving shaft penetrates through the shell and can rotate relative to the shell, the base, the driven wheel and the elastic element are all sleeved on the driving shaft, the driving shaft and the driven wheel can rotate relative to the base, and the base is fixed with the shell;

the base is fixed with a first limiting block, the drive shaft is fixed with a second limiting block, the driven wheel is fixed with a third limiting block, the first limiting block, the second limiting block and the third limiting block are arranged in the radial direction of the drive shaft, one end of the elastic element is connected with the base, and the other end of the elastic element is connected with the drive shaft.

5. The drive cassette of claim 4, wherein: the driving assembly further comprises a first connecting rod, the first end of the first connecting rod is hinged to the moving piece, the second end of the first connecting rod is hinged to the driven wheel, and the hinged point of the first connecting rod and the driven wheel deviates from the axial lead of the driven wheel.

6. The drive cassette of claim 4, wherein: the driving assembly further comprises a rack, the rack is fixedly connected with the movable piece, the driven wheel is a gear or a sector gear, and the driven wheel is meshed with the rack.

7. The drive cassette of claim 4, wherein: the movable piece is further provided with a seventh guide groove and a sixth guide post matched with the seventh guide groove, the seventh guide groove is arranged at intervals relative to the length direction of the movable piece, the sixth guide post is arranged in the seventh guide groove and is fixed with the shell, and the seventh guide groove is parallel to the axis of the movable piece.

8. The drive cassette of any of claims 1-3, 5-7, wherein: the movable part is characterized by further comprising a supporting gasket, the supporting gasket is located between the shell and the movable part, one surface of the supporting gasket is fixed with the movable part, the other surface of the supporting gasket is abutted to the inner wall of the shell, and the supporting gasket can slide relative to the shell.

9. The drive cassette of any of claims 1-3, 5-7, wherein: the transmission box further comprises a locking mechanism, the locking mechanism comprises a stop piece, a fifth guide post, a sixth guide groove and a lock cylinder mounting position arranged on the shell, the stop piece is connected with the shell in a sliding mode, the sixth guide groove is formed in the shell, the fifth guide post is fixedly connected with the stop piece, the fifth guide post is arranged in the sixth guide groove and can move relative to the sixth guide groove, a limiting groove matched with the stop piece is formed in the movable piece, and the lock cylinder mounting position is used for mounting a lock cylinder;

when the locking mechanism is in a locking state, the stop piece moves into the limiting groove along the sixth guide groove, and when the locking mechanism is in an unlocking state, the stop piece is far away from the limiting groove.

10. A push-pull door and window is characterized in that: the door and window sash driving device comprises a pulley assembly and the transmission box as claimed in any one of claims 1 to 9, wherein the transmission box is used for being connected with a handle and driving the transmission box to act through the handle, the transmission box is in transmission connection with the pulley assembly, and the transmission box controls the pulley assembly to act relative to a door and window sash according to the action of the handle, so that the door and window sash is in a lifting or falling state.

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