Lifting pulley block with good bearing performance and lifting door and window system

Abstract

The utility model discloses a lifting pulley block with good bearing performance and a lifting door and window system, the lifting pulley block is configured at the bottom of a sash frame and comprises a lifting seat and a pulley assembly, and the lifting seat is connected with the corner of the bottom of the sash frame; the pulley assembly is movably matched with the lifting seat; the pulley assembly comprises two fixing plates arranged on the front side and the rear side of the lifting seat respectively and two pulleys which are connected between the two fixing plates in a clamped mode and arranged in a left-right spaced mode, and each pulley comprises a pulley wheel disc and a double-row ball bearing arranged in the pulley wheel disc. And the pulley penetrates through the double-row ball bearing through a fixing pin so as to be fixed on the fixing plate. Therefore, the size of the pulley made of the double-row ball bearings can be further reduced on the premise of ensuring the same bearing capacity as that of a large-size pulley, so that the visual surface of the bottom profile of the sash frame is narrowed, and the pulley is simpler, more elegant and better in visual effect.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window hardware accessories, and in particular to a lifting pulley block with good load-bearing performance and a lifting door and window system. Background Art

[0002] This section only provides background information related to the present application to help those skilled in the art understand the present application more thoroughly and accurately, and it is not necessarily prior art.

[0003] The lifting and sliding doors and windows on the market usually include a slide rail and a door leaf that can slide back and forth on the slide rail. The door leaf is equipped with a handle, a transmission assembly connected to the handle, and a pulley assembly connected to the transmission assembly; wherein the door leaf is supported on the slide rail through the pulley assembly and reciprocates on the slide rail through the pulley assembly. However, for heavy lifting doors and windows, due to the large size and weight of the door leaf, in order to meet the load-bearing requirements of the door leaf, it is usually necessary to use a pulley assembly with larger specifications and dimensions, which results in a larger width of the sash frame profile, reducing the overall aesthetics of the door and window.

[0004] Therefore, how to design a lifting pulley block that can ensure load-bearing capacity and has small specifications and dimensions is a technical problem that needs to be solved urgently by technical personnel in this field. Utility Model Content

[0005] In order to overcome the defects of the above-mentioned prior art, the utility model provides a lifting pulley group and a lifting door and window system with good load-bearing performance. The pulley is made of double-row ball bearings. The size can be further reduced while ensuring the same load-bearing capacity as a large-size pulley, thereby narrowing the visible surface of the sash frame, making it more concise and elegant, thereby achieving a better visual effect.

[0006] The technical solution adopted by the utility model to solve the problem is:

[0007] A lifting pulley block with good load-bearing performance, which is arranged at the bottom of the fan frame, comprises:

[0008] A lifting seat, which is used to connect with the bottom corner of the fan frame;

[0009] A pulley assembly movably cooperates with the lifting seat;

[0010] Among them, the pulley assembly includes two fixed plates respectively arranged on the front and rear sides of the lifting seat and two pulleys clamped and connected between the two fixed plates and arranged at intervals on the left and right, and the pulley is used to slide on the slide rail; the pulley includes a pulley disc and a double-row ball bearing arranged in the pulley disc, and the pulley passes through the double-row ball bearing through a fixing pin and is connected and fixed to the fixed plate.

[0011] Furthermore, it also includes a first transmission assembly arranged at one end of the pulley assembly, wherein:

[0012] The first transmission assembly includes a corner piece and a push-pull rod, the corner piece has a first end, a second end and a third end, the first end of the corner piece is hinged to the lifting seat through a latch, the second end of the corner piece is hinged to the push-pull rod through a latch; the third end of the corner piece is transmission-connected to the fixed plate through a connecting rod;

[0013] The push-pull rod is slidably disposed on the lifting seat. When the push-pull rod is driven to slide on the lifting seat, the corner piece can be driven to rotate, and then the fixing plate can be driven to move through the connecting rod.

[0014] Furthermore, the third end of the corner piece is hinged to one end of the connecting rod through a latch pin, and the other end of the connecting rod extends between the two fixing plates and is connected and fixed to the fixing plates through a fixing pin.

[0015] Further, the lifting seat comprises a seat body and a mounting plate arranged on the seat body, wherein:

[0016] The mounting plate is an L-shaped structure and includes a horizontal plate portion and a vertical plate portion. The horizontal plate portion is fixed on the base body. A sliding groove is provided on the vertical plate portion. A sliding block is provided on the push-pull rod and is slidably mounted on the sliding groove via the sliding block.

[0017] Furthermore, it also includes a connector disposed at the other end of the pulley assembly, the connector being clamped and fixed between the two fixing plates; the pulley assembly is connected to another pulley assembly via the connector.

[0018] Furthermore, it also includes a lifting shaft fixedly connected between the two fixing plates, the lifting seat is provided with a guide groove, the lifting shaft is passed through the guide groove and can slide along the guide groove;

[0019] When the fixed plate is driven to lift or lower, the pulley and the lifting shaft can be driven to lift or lower synchronously, and the lifting and sinking of the door leaf can be realized through the cooperation of the lifting shaft and the guide groove; when the lifting shaft slides to the top of the guide groove, the door leaf completes the sinking action; when the lifting shaft slides to the bottom of the guide groove, the door leaf completes the lifting action.

[0020] Furthermore, it also includes at least one cushion block arranged at the bottom of the lifting seat, wherein:

[0021] When the door leaf completes the sinking action, the cushion block abuts against the slide rail, and the pulley is separated from the slide rail; when the door leaf completes the lifting action, the cushion block is separated from the slide rail, and the pulley is in contact with the slide rail.

[0022] In addition, the utility model also provides a lifting door and window system, comprising the lifting pulley block, door leaf, slide rail and slide rail box, wherein:

[0023] The door leaf comprises a leaf body and a leaf frame, and the lifting pulley block is installed at the bottom corner of the leaf frame;

[0024] The slide rail box is located below the door leaf, and the slide rail is arranged in the slide rail box; the lifting pulley block at least partially extends into the slide rail box and is slidably arranged on the slide rail through the pulley.

[0025] Furthermore, it also includes a handle assembly and a transmission mounted on the fan frame, wherein:

[0026] The handle assembly includes a handle, the transmission includes a second transmission assembly and a transmission bar, and the handle, the second transmission assembly and the transmission bar are sequentially connected in transmission;

[0027] The transmission bar is in transmission connection with the pulley assembly. When the handle is rotated, the transmission bar can be driven to move up and down by the second transmission assembly, thereby driving the pulley assembly to perform a lifting or lowering action to achieve lifting or sinking of the door leaf.

[0028] Furthermore, the handle assembly and the transmission are both arranged on one side of the fan frame.

[0029] In summary, the utility model provides a lifting pulley block and lifting door and window system with good load-bearing performance, which has the following beneficial effects:

[0030] (1) The lifting pulley block of the utility model adopts a pulley made of double-row ball bearings. Under the premise of ensuring the same load-bearing capacity as a large-sized pulley, the size can be further reduced, thereby narrowing the visible surface of the bottom profile of the sash frame, making it more simple and elegant, thereby achieving a better visual effect.

[0031] (2) In the lifting door and window system of the utility model, the handle assembly and the transmission are both installed on the same side of the sash frame, so as to narrow the visible surface of the side profile of the sash frame, making it more simple and beautiful, and providing a wider field of view and better visual effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is an explosion diagram of the lifting pulley block of the utility model;

[0033] Figure 2This is the front view of the lifting pulley block of the utility model;

[0034] Figure 3 for Figure 2 Schematic diagram of the AA section;

[0035] Figure 4 This is a top view of the lifting pulley block of the utility model;

[0036] Figure 5 for Figure 4 Schematic diagram of the middle BB section (the pulley assembly is in the lifting state at this time);

[0037] Figure 6 It is a cross-sectional schematic diagram of the pulley assembly in the lifting pulley block of the utility model when it is in a sinking state;

[0038] Figure 7 It is an exploded schematic diagram of the lifting door and window system of the utility model;

[0039] Figure 8 This is a schematic diagram of the structure of the lifting door and window system of the utility model after the slide rail box is hidden;

[0040] Fig. 9 It is a partial structural schematic diagram of the door and window in the lifting door and window system of the utility model when the door and window are in a sunken state;

[0041] Fig.10 It is a partial structural schematic diagram of the lifting door and window system of the utility model when the door and window are in the lifting state.

[0042] The meanings of the reference numerals are as follows:

[0043] 1. Lifting pulley assembly; 11. Lifting seat; 111. Seat body; 1111. Guide groove; 1112. First hinge hole; 112. Mounting plate; 1121. Horizontal plate portion; 1122. Vertical plate portion; 11221. Slide groove; 12. Pulley assembly; 121. Fixing plate; 1211. First fixing hole; 1212. Fourth fixing hole; 1213. Second fixing hole; 1214. Third fixing hole; 122. Pulley; 1221. Pulley wheel disc; 1222. Double-row ball bearing; 123. Fixing pin; 124. Lifting shaft; 1 3. Corner piece; 131. Third hinge hole; 132. Fourth hinge hole; 133. Fifth hinge hole; 14. Push-pull rod; 141. Sixth hinge hole; 142. Slider; 15. Connecting rod; 151. Seventh hinge hole; 152. Fifth fixing hole; 16. Latch; 17. Connecting head; 171. Boss; 18. Pad; 2. Door leaf; 21. Leaf body; 22. Leaf frame; 3. Slide rail; 4. Slide rail box; 5. Rear lifting pulley block; 6. Connecting rod; 7. Handle assembly; 71. Handle; 8. Transmission; 9. Locking transmission assembly. DETAILED DESCRIPTION

[0044] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the modules or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0047] Embodiment 1

[0048] See also Figure 1-6 The utility model first provides a lifting pulley block 1 with good load-bearing performance, including a lifting seat 11 and a pulley assembly 12. The lifting pulley block 1 is connected to the bottom corner of the fan frame 22 through the lifting seat 11; the pulley assembly 12 is movably matched with the lifting seat 11. The pulley assembly 12 includes two fixed plates 121 respectively arranged at the front and rear sides of the lifting seat 11, and two pulleys 122 clamped and connected between the two fixed plates 121 and arranged at intervals on the left and right. The pulley 122 is used to slide on the slide rail 3, and the pulley 122 includes a pulley wheel 1221 and a double-row ball bearing 1222 arranged in the pulley wheel 1221. The pulley 122 passes through the double-row ball bearing 1222 through a fixing pin 123 to be fixed on the fixing plate 121.

[0049] Therefore, the pulley 122 made of double-row ball bearings can be further reduced in size while ensuring the same load-bearing capacity as the large-sized pulley 122, thereby narrowing the visible surface of the bottom profile of the sash frame 22, making it more simple and elegant, thereby achieving a better visual effect.

[0050] In this embodiment, the fixing plate 121 is provided with a first fixing hole 1211 for fixing and matching with the end of the fixing pin 123 .

[0051] Furthermore, the lifting pulley group 1 also includes a first transmission assembly arranged at one end of the pulley assembly 12, the first transmission assembly includes a corner piece 13, a push-pull rod 14 and a connecting rod 15, the corner piece 13 is a triangular structure and has a first end, a second end and a third end, the first end of the corner piece 13 is hinged to the lifting seat 11 through a pin 16, the second end of the corner piece 13 is hinged to the push-pull rod 14 through a pin 16, the third end of the corner piece 13 is hinged to one end of the connecting rod 15 through a pin 16, and the other end of the connecting rod 15 extends between the two fixed plates 121 and is hinged to the fixed plate 121 through a fixing pin 123.

[0052] Among them, the push-pull rod 14 is slidably arranged on the lifting seat 11. When the push-pull rod 14 is driven to slide on the lifting seat 11, it can drive the corner piece 13 to rotate, and then drive the fixed plate 12 to perform lifting or lowering action in the left and right directions through the connecting rod 15, thereby realizing the lifting or sinking of the door leaf 2.

[0053] Specifically, the lifting seat 11 includes a seat body 111 and a mounting plate 112 arranged on the seat body 111. The mounting plate 112 is an L-shaped structure and includes a horizontal plate portion 1121 and a vertical plate portion 1122. The horizontal plate portion 1121 is fixed on the seat body 111. The vertical plate portion 1122 is provided with a slide groove 11221. The push-pull rod 14 is provided with a slider 142. The push-pull rod 14 is slidably arranged on the slide groove 11221 through the slider 142 to achieve up and down movement; the first end of the corner piece 13 is hinged to the seat body 111 through a pin 16.

[0054] In this embodiment, the first end of the corner piece 13 is provided with a third hinge hole 131, and one end of the base body 111 is provided with a first hinge hole 1112, and a pin 16 is used to pass through the first hinge hole 1112 and the third hinge hole 131 to hinge the corner piece 13 and the base body 111; the second end of the corner piece 13 is provided with a fourth hinge hole 132, and the lower end of the push-pull rod 14 is provided with a sixth hinge hole 141, and a pin 16 is used to pass through the fourth hinge hole 132 and the sixth hinge hole 141 to hinge the corner piece 13 and the push-pull rod 14. The third end of the corner piece 13 is provided with a fifth hinge hole 133, and one end of the connecting rod 15 is provided with a seventh hinge hole 151. A latch pin 16 is passed through the seventh hinge hole 151 and the fifth hinge hole 133 to hinge the corner piece 13 and one end of the connecting rod 6; the other end of the connecting rod 6 is provided with a fifth fixing hole 152, and the fixing plate 121 is provided with a fourth fixing hole 1212. A fixing pin 123 is passed through the fourth fixing hole 1212 and the fifth fixing hole 152 to connect and fix the connecting rod 6 to the fixing plate 121.

[0055] Furthermore, it also includes a connecting head 17 arranged at the other end of the pulley assembly 12, and the connecting head 17 is clamped and fixed between the two fixing plates 121; specifically, the front and rear sides of the connecting head 17 are provided with a boss 171, and the fixing plate 121 is provided with a third fixing hole 1214; thus, the connection between the two is achieved by inserting the boss 171 into the third fixing hole 1214 and clamping it.

[0056] Therefore, by providing the connecting head 17 , the pulley assembly 12 can be connected to another pulley assembly 12 through the connecting head 17 to form a pulley mechanism, thereby further improving the supporting load-bearing capacity of the door leaf 2 .

[0057] See also Figure 1-6 The lifting pulley block 1 further includes a lifting shaft 124 fixedly connected between the two fixing plates 121. A guide groove 1111 is provided on the seat body 111 of the lifting seat 11. The lifting shaft 124 is inserted into the guide groove 1111 and can move along the guide groove 1111. Specifically, a second fixing hole 1213 is provided on the fixing plate 121. One end of the lifting shaft 124 is inserted into the second fixing hole 1213 and is clamped and fixed.

[0058] Since the lifting shaft 124 is fixed on the fixing plate 121, it can move with the fixing plate 121. When the fixing plate 121 is lifted or lowered in the left and right directions, the pulley 122 and the lifting shaft 124 can be synchronously driven to lift or lower, and the door leaf 2 can be lifted or lowered through the cooperation between the lifting shaft 124 and the guide groove 1111. When the lifting shaft 124 is driven to slide to the lowest end of the guide groove 1111, the door leaf 2 completes the lifting action; when the lifting shaft 124 is driven to slide to the top of the guide groove 1111, the door leaf 2 completes the sinking action.

[0059] Furthermore, it also includes at least one cushion block 18 arranged at the bottom of the lifting seat 11. Preferably, the cushion block 18 is made of nylon. When the door leaf 2 completes the sinking action, the cushion block 18 abuts against the slide rail 3, and the pulley 122 disengages from the slide rail 3. At this time, the door leaf 2 cannot move, thereby ensuring that after the door leaf 2 drops to the lowest position, the user cannot push it, thereby improving the stability of the door leaf 2.

[0060] Of course, in other embodiments, the cushion block 18 may also be made of other plastic or rubber materials, which are not limited here.

[0061] Embodiment 2

[0062] See also Figure 7-10The utility model also provides a lifting door and window system, comprising the lifting pulley block 1 of the first embodiment, the door leaf 2, the slide rail 3, the slide rail box 4 and the rear lifting pulley block 5, the door leaf 2 comprises a leaf body 21 and a leaf frame 22, the lifting pulley block 1 is installed on the left side of the bottom of the leaf frame 22, and the rear lifting pulley block 5 is installed on the right side of the bottom of the leaf frame 22, the lifting pulley block 1 and the rear lifting pulley block 5 have the same structure and are connected by a connecting rod to form a pulley mechanism, the pulley mechanism can support the door leaf 2, and the door leaf 2 is slidably arranged on the slide rail 3 through the pulley mechanism. Among them, the slide rail box 4 is located below the door leaf 2 and is provided with a slide rail 3 inside, the pulley mechanism at least partially extends into the slide rail box 4 and is slidably arranged on the slide rail 3, thereby, the slide rail box 4 can cover the pulley mechanism to achieve "hiding" of the pulley mechanism, thereby improving the overall aesthetics of the lifting door and window system.

[0063] Furthermore, the lifting door and window system also includes a handle assembly 7 and a transmission 8 arranged on the left side of the sash frame 22, the handle assembly 7 includes a handle 71, and the transmission 8 includes a second transmission assembly and a transmission bar, and the handle 71, the second transmission assembly and the transmission bar are sequentially connected in transmission; the end of the transmission bar is connected to the push-pull rod 14, so that when the handle 71 is rotated, the push-pull rod 14 can be driven up and down through the transmission of the second transmission assembly and the transmission bar in turn, thereby driving the pulley assembly 12 to perform lifting or lowering action to achieve lifting or sinking of the door 2.

[0064] When the lifting shaft 124 is driven to slide to the top of the guide groove 1111, the door leaf 2 completes the sinking action and abuts against the slide rail box 4. At the same time, the bottom of the lifting seat 11 abuts against the slide rail 3 through the cushion block 18 and the pulley 122 is separated from the slide rail 3. At this time, the door leaf 2 cannot move. Fig. 9 As shown; when the lifting shaft 124 is driven to slide to the lowest end of the guide groove 1111, the door leaf 2 completes the lifting action and disengages from the slide rail box 4, and at the same time, the pad 18 on the lifting seat 11 is disengaged from the slide rail 3 and the pulley 122 is in contact with the slide rail 3. At this time, pushing the door leaf 2 can drive the door leaf 2 to move left and right, such as Fig.10 shown.

[0065] In addition, it also includes a locking transmission assembly 9 installed on the right side of the sash frame 22, and the locking transmission assembly 9 is connected to the rear lifting pulley group 5. The locking transmission assembly 9 at least includes a locking transmission bar. When the lifting pulley group 1 is driven to move, the rear lifting pulley group 5 can be driven to move through a connecting rod, and then the locking transmission bar can be driven up and down to achieve locking and unlocking of the sash frame 22.

[0066] Therefore, the handle assembly 7 and the transmission device 8 are installed on the side of the sash frame 22, which can narrow the visible surface of the side profile of the sash frame 22, making it more simple and beautiful as a whole, and providing a wider field of view and a better visual effect.

[0067] The working process of the lifting door and window system of the utility model is as follows:

[0068] When the door leaf 2 needs to be lifted, by turning the handle 71, the transmission device 8 and the first transmission component can be driven in turn to drive the fixed plate 121 to descend to the left, and synchronously drive the pulley 122 and the lifting shaft 124 to descend to the left until the pulley 122 contacts the slide rail 3. At this time, the pulley 122 does not move, and the lifting shaft 124 continues to descend and drives the door leaf 2 to lift by cooperating with the guide groove 1111 until the lifting shaft 124 descends to the lowest end of the guide groove 1111. At this time, the door leaf 2 completes the lifting action and disengages from the slide rail box 4, and the pad 18 at the bottom of the lifting seat 11 is separated from the slide rail 3.

[0069] Similarly, when the door leaf 2 needs to be lowered, by rotating the handle 71 in the opposite direction, the transmission device 8 and the first transmission component can be driven in turn to move and drive the fixed plate 121 to lift to the right, and simultaneously drive the lifting shaft 124 to lift and drive the door leaf 2 to sink through its cooperation with the guide groove 1111, until the door leaf 2 sinks to abut against the slide rail box 4 and the pad 18 at the bottom of the lifting seat 11 abuts against the slide rail 3, at this time, the pulley 122 can be driven to lift to the right and disengage from the slide rail 3, until the lifting shaft 124 rises to the top of the guide groove 1111, at which time the door leaf 2 completes the sinking action.

[0070] In summary, the utility model provides a lifting pulley block 1 with good load-bearing performance and a lifting door and window system, which has the following beneficial effects:

[0071] (i) The lifting pulley block 1 of the utility model adopts a pulley 122 made of a double-row ball bearing 1222. Under the premise of ensuring the same load-bearing capacity as the large-sized pulley 122, the size can be further reduced, thereby achieving a narrower visible surface of the bottom profile of the sash frame 22, making it more simple and generous, thereby achieving a better visual effect.

[0072] (ii) In the lifting door and window system of the present invention, the handle assembly 7 and the transmission device 8 are both installed on the same side of the sash frame 22, so as to narrow the visible surface of the side profile of the sash frame 22, making it more simple and beautiful, and providing a wider field of view and a better visual effect.

[0073] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0074] It should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the modules or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0075] In addition, in the description of the present utility model, "multiple" and "several" mean two or more than two, unless otherwise clearly and specifically defined.

[0076] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A lifting pulley block with good load-bearing performance, which is arranged at the bottom of the fan frame, characterized in that: include: A lifting seat, which is used to connect with the bottom corner of the fan frame; A pulley assembly movably cooperates with the lifting seat; Among them, the pulley assembly includes two fixed plates respectively arranged on the front and rear sides of the lifting seat and two pulleys clamped and connected between the two fixed plates and arranged at intervals on the left and right, and the pulley is used to slide on the slide rail; the pulley includes a pulley disc and a double-row ball bearing arranged in the pulley disc, and the pulley passes through the double-row ball bearing through a fixing pin and is connected and fixed to the fixed plate.

2. The lifting pulley block according to claim 1, characterized in that: It also includes a first transmission assembly disposed at one end of the pulley assembly, wherein: The first transmission assembly includes a corner piece and a push-pull rod, the corner piece has a first end, a second end and a third end, the first end of the corner piece is hinged to the lifting seat through a latch, the second end of the corner piece is hinged to the push-pull rod through a latch; the third end of the corner piece is transmission-connected to the fixed plate through a connecting rod; The push-pull rod is slidably disposed on the lifting seat. When the push-pull rod is driven to slide on the lifting seat, the corner piece can be driven to rotate, and then the fixing plate can be driven to move through the connecting rod.

3. The lifting pulley block according to claim 2, characterized in that: The third end of the corner piece is hinged to one end of the connecting rod through a latch pin, and the other end of the connecting rod extends between the two fixing plates and is connected and fixed to the fixing plates through a fixing pin.

4. The lifting pulley block according to claim 2, characterized in that: The lifting seat comprises a seat body and a mounting plate arranged on the seat body, wherein: The mounting plate is an L-shaped structure and includes a horizontal plate portion and a vertical plate portion. The horizontal plate portion is fixed on the base body. A sliding groove is provided on the vertical plate portion. A sliding block is provided on the push-pull rod and is slidably mounted on the sliding groove via the sliding block.

5. The lifting pulley block according to claim 1, characterized in that: It also includes a connector arranged at the other end of the pulley assembly, and the connector is clamped and fixed between the two fixing plates; the pulley assembly is connected to another pulley assembly through the connector.

6. The lifting pulley block according to any one of claims 1 to 5, characterized in that: It also includes a lifting shaft fixedly connected between the two fixing plates, the lifting seat is provided with a guide groove, the lifting shaft is passed through the guide groove and can slide along the guide groove; When the fixed plate is driven to lift or lower, the pulley and the lifting shaft can be driven to lift or lower synchronously, and the lifting and sinking of the door leaf can be realized through the cooperation of the lifting shaft and the guide groove; when the lifting shaft slides to the top of the guide groove, the door leaf completes the sinking action; when the lifting shaft slides to the bottom of the guide groove, the door leaf completes the lifting action.

7. The lifting pulley block according to claim 6, characterized in that: Also includes at least one cushion block arranged at the bottom of the lifting seat, wherein: When the door leaf completes the sinking action, the cushion block abuts against the slide rail, and the pulley is separated from the slide rail; when the door leaf completes the lifting action, the cushion block is separated from the slide rail, and the pulley is in contact with the slide rail.

8. A lifting door and window system, characterized in that: The invention comprises a lifting pulley block, a door leaf, a slide rail and a slide rail box as claimed in any one of claims 1 to 7, wherein: The door leaf comprises a leaf body and a leaf frame, and the lifting pulley block is installed at the bottom corner of the leaf frame; The slide rail box is located below the door leaf, and the slide rail is arranged in the slide rail box; the lifting pulley block at least partially extends into the slide rail box and is slidably arranged on the slide rail through the pulley.

9. The lifting door and window system according to claim 8, characterized in that: It also includes a handle assembly and a transmission mounted on the fan frame, wherein: The handle assembly includes a handle, and the transmission includes a second transmission assembly and a transmission bar, and the handle, the second transmission assembly and the transmission bar are sequentially connected in transmission; The transmission bar is in transmission connection with the pulley assembly. When the handle is rotated, the transmission bar can be driven to move up and down by the second transmission assembly, thereby driving the pulley assembly to perform a lifting or lowering action to achieve lifting or sinking of the door leaf.

10. The lifting door and window system according to claim 9, characterized in that: The handle assembly and the transmission are both arranged on one side of the fan frame.

Images