A multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings

Abstract

The present invention relates to a multi-stroke coupled crankshaft adapted to fire rescue windows of special-shaped buildings. It solves the problem that the conventional crankshaft window opener in the prior art is difficult to adapt to fire rescue windows with weaving and relief shapes, and the rotation range is also easily limited, making it difficult to achieve flexible opening and closing. It includes a shaft base symmetrically arranged on two adjacent sides of a window frame, the inner wall of the window frame is provided with a connecting base for the shaft base, the inner side of the window frame can be opened and closed by symmetrically arranged window sashes, the shaft bases are connected by a coaxial screw, a crankshaft assembly is sleeved between one end of the coaxial screw and the shaft base, the end of the crankshaft assembly away from the shaft base is connected to a sash fixed angle code through a flip shaft structure, and the sash fixed angle code is connected to the sash in the window frame and is linked to flip through the flip shaft structure. The advantages of the present invention are: it can not only meet the requirements of architectural effects, but also meet the opening and passage function of the fire rescue window, and the opening and closing are flexible and smooth.

Description

Technical Field

[0001] The invention relates to the technical field of building design, and in particular to a multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings. Background Art

[0002] The crank arm window opener is a device that can open and close multiple windows at the same time, which can effectively save people's time in opening and closing windows one by one and reduce labor intensity. The actual operation is simpler and faster. The traditional crank arm window opener is usually composed of a linkage rod, a crank arm and a support rod. The crank arm is installed on the linkage rod, and the two ends of the support rod are respectively connected to one end of the crank arm and the surface of the lower or upper end of the window. By rotating the linkage rod, the crank arm is driven to link the support rod, so that multiple windows can be opened or closed at the same time. As the window has been used for a long time, the rotation smoothness between the window and the window frame will be reduced. Therefore, in the process of opening the window, it is usually necessary to apply greater force. In addition, the crank arm window opener opens and closes multiple windows at the same time. Therefore, in actual use, if the rotation smoothness between the window and the window frame is reduced, the force on the support rod will be greatly increased during the opening and closing of the window. Therefore, the traditional support rod will bend after long-term use, resulting in the problem that the window is not closed tightly enough; in addition, with the development of BIM technology in the construction industry, more and more fluids are being used in the design of building skins. Curved shapes are used in building surfaces, and woven textures often appear. For some special-shaped fire rescue windows, traditional profile window hardware cannot meet the needs of current woven and embossed fire rescue windows, which is mainly reflected in the fact that the rescue windows are set in irregular polygons, and the window sashes mostly have convex and concave embossed shapes. Because the window openings are irregular and deformed, and the architectural effect does not allow the destruction of the building's facade texture, and does not allow regular rescue windows to protrude, the traditional curved arm window opener with the side of the regular opening as the axis is difficult to adapt and use, and the rotation is easily restricted, making it difficult to achieve flexible opening and closing, affecting the window opening operation and the overall building's facade texture effect.

[0003] In order to solve the deficiencies in the prior art, people have conducted long-term explorations and proposed various solutions. For example, a Chinese patent document discloses a long-life crank-type automatic window opener [CN202020585540.1], which includes a window frame body, a window body, a linkage shaft, a limit sleeve, a locking box, a crank and a first mounting plate, wherein the window frame body is provided with a window body, and both sides of the window frame body are provided with limit sleeves, and the two limit sleeves are plugged with linkage shafts, and the outer wall of the linkage shaft is welded with a second mounting plate, and the outer wall of the second mounting plate away from the window body is provided with a first mounting plate, and the outer wall of one side of the first mounting plate is welded with a curved rod, and the outer walls of both sides of one end of the curved rod are symmetrically provided with a second rotating shaft, and the outer wall of the second rotating shaft is sleeved with a support rod, and the outer wall of the lower end of the window body is symmetrically provided with a fixing plate, and a locking box is installed at one end of the linkage shaft.

[0004] The above scheme has solved to a certain extent the problem in the prior art that the curved arm window opener has low rotation smoothness and the support rod is prone to bending, which affects the opening and closing effects of doors and windows. However, the scheme still has many shortcomings. For example, it is difficult to adapt to fire rescue windows with woven and embossed shapes, and the rotation range is also easily limited, making it difficult to achieve flexible opening and closing, affecting the window opening operation and the overall building facade texture effect. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned problems and to provide a multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings, including shaft bases symmetrically arranged on two adjacent sides of a window frame, an inner wall of the window frame is provided with a connecting base for the shaft base, the inner side of the window frame can be opened and closed by symmetrically arranged window sashes, the shaft bases are connected by a coaxial screw, a crankshaft assembly is sleeved between one end of the coaxial screw and the shaft base, the end of the crankshaft assembly away from the shaft base is connected to a sash fixed angle code through a flip shaft structure, and the sash fixed angle code is connected to the window sash in the window frame and is linked to flip through the flip shaft structure.

[0007] In the above-mentioned one or a multi-stroke coupled crankshaft adapted for fire rescue windows of special-shaped buildings, the crankshaft assembly includes a rotating shaft sleeve arranged at one end and a flip shaft hole arranged at the other end, a linkage long shaft arm is arranged on the rotating shaft sleeve, and a linkage short shaft arm is arranged at the end of the linkage long shaft arm away from the rotating shaft sleeve, the linkage long shaft arm and the linkage short shaft arm are formed integrally with each other and form an angle therebetween, and the flip shaft hole is arranged on the linkage short shaft arm.

[0008] In the above-mentioned multi-stroke coupled crank arm shaft suitable for fire rescue windows of special-shaped buildings, flip limit clamps are provided on both sides of the linkage short axis arm, and a flip stroke limit seat corresponding to the flip limit clamp is provided on the fixed angle code of the window sash, rotation limit clamps are provided on both sides of the linkage long axis arm, and a rotation stroke limit seat corresponding to the rotation limit clamp is provided on the shaft base.

[0009] In the above-mentioned multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings, the rotating sleeve at one end of the crankshaft assembly is arranged on the shaft of the shaft base, and a nylon pad is provided between one side of the rotating sleeve and the shaft base, and a stainless steel pad for positioning the rotating sleeve is provided on the coaxial screw and on the other side of the rotating sleeve, a locking nut is provided on one side of the stainless steel pad, and a compression spring is provided between the locking nut and the stainless steel pad.

[0010] In the above-mentioned one or a multi-stroke coupled crank arm shaft suitable for fire rescue windows of special-shaped buildings, the flip shaft structure includes a shaft screw, which is passed through the flip shaft hole, and positioning nuts for positioning the linkage short shaft arm are provided on the shaft screw and on both sides of the flip shaft hole, and a metal anti-friction pad is provided between one end of the upper positioning nut and the fixed angle code of the window sash, and spring pads are provided between the metal anti-friction pad and the upper positioning nut and between the lower positioning nut and the linkage short shaft arm.

[0011] In the above-mentioned one or a multi-stroke coupled crankshaft adapted for fire rescue windows of special-shaped buildings, the connecting base includes an L-shaped vertically arranged connecting portion, one end of the connecting portion is provided with a fixing portion connected to the window frame, and the above-mentioned rotating shaft base is connected to the outer wall on one side of the connecting portion, and the outer wall on the other side of the connecting portion is connected to a guide positioning cross frame, the other end of the guide positioning cross frame is connected to the connecting portion used to position different rotating shaft bases, and the bottom of the guide positioning cross frame is provided with a guide positioning connecting piece for guiding and positioning the window sash.

[0012] In the above-mentioned multi-stroke coupled crankshaft adapted for fire rescue windows of special-shaped buildings, the guide positioning connecting piece is arranged in an inverted Z shape, and the upper end of the guide positioning connecting piece has an upper vertical portion that fits mutually with one side of the guide positioning cross frame, and the lower end of the guide positioning connecting piece is provided with a lower vertical portion connected to the side wall of the window sash, and the upper vertical portion and the lower vertical portion are connected by a horizontal portion.

[0013] In the above-mentioned multi-stroke coupled crankshaft adapted for fire rescue windows of special-shaped buildings, the horizontal portion is connected to the upper end of the window sash through a connecting nut, a clearance is formed between the upper vertical portion and the horizontal portion for the guide positioning cross frame to pass through, and a connecting gap is formed between the lower vertical portion and the horizontal portion for one end of the window sash to be inserted.

[0014] In the above-mentioned multi-stroke coupled crankshaft adapted for fire rescue windows of special-shaped buildings, a rotating button handle is provided on the window sash fixing angle bracket or the window sash.

[0015] In the above-mentioned multi-stroke coupled crankshaft shaft adapted for fire rescue windows of special-shaped buildings, one end of the coaxial screw rod is connected to the shaft rod of the shaft base through a nut sleeve.

[0016] In the above-mentioned multi-stroke coupled crank arm shaft suitable for fire rescue windows of special-shaped buildings, a symmetrically arranged rotation drive motor is provided on the partition frame body in the window frame, and the output ends of the rotation drive motor are respectively connected with linkage rods through linkage gear structures, and the ends of the linkage rods away from the output ends of the rotation drive motor are connected with the corresponding coaxial screw rods through an umbrella gear structure, and one of the linkage rods is provided with a linkage plug cylinder at one end away from the coaxial screw rod, and the other linkage rod is slidably provided with a sliding linkage plug cylinder corresponding to the connecting plug cylinder at one end away from the coaxial screw rod, a plurality of rotation positioning slots are provided in the linkage plug cylinder, a plurality of rotation positioning ribs are provided on the circumferential outer wall of the sliding linkage plug cylinder corresponding to the rotation positioning slots, and the end of the sliding linkage rod away from the linkage plug cylinder is slidably arranged on the circumferential inner side of the linkage rod and is circumferentially provided with a sliding push button exposed from the linkage rod, and the linkage rod is provided with a sliding stroke limiting groove for limiting the sliding push button.

[0017] Compared with the existing technology, the advantages of the present invention are: it can not only meet the requirements of architectural effects, but also meet the opening and passage functions of fire rescue windows, and realize the smooth opening of fire rescue windows that adapt to irregular polygonal openings and have woven textures and relief characteristics, and maximize the perfect unity of rescue windows and architectural textures. It can be applied to steel window frames and window sash frames, and solves the technical problem of traditional window profiles for non-right angle splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the position arrangement of the crankshaft shaft assembly in the present invention;

[0020] Figure 3 It is a detailed structural schematic diagram of the crankshaft shaft assembly in the present invention;

[0021] Figure 4 It is a schematic diagram of the flip axis structure in the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the window sash in the closed state of the present invention;

[0023] Figure 6 It is a schematic diagram of the translation stroke in the present invention;

[0024] Figure 7 It is a schematic diagram of the second rotation stroke in the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the guide and positioning connector in the present invention;

[0026] Fig. 9 It is a schematic diagram of the linkage structure of the linkage rod in the present invention;

[0027] In the figure: window frame 1, window sash 11, window sash fixing angle code 12, flip travel limit seat 121, shaft base 2, rotation travel limit seat 21, nylon pad 22, stainless steel pad 23, locking nut 24, compression spring 25, connecting base 3, connecting part 31, fixing part 32, guide positioning cross frame 33, coaxial screw rod 4, nut sleeve 41, rotation drive motor 42, linkage gear structure 43, linkage rod 44, bevel gear structure 45, curved Arm shaft assembly 5, rotating sleeve 51, flip shaft hole 52, linkage long axis arm 53, limit clamp 531, linkage short axis arm 54, flip limit clamp 541, flip shaft structure 6, shaft screw 61, positioning nut 62, metal anti-friction pad 63, spring pad 64, guide positioning connector 7, upper vertical part 71, lower vertical part 72, horizontal part 73, connecting nut 74, make way gap 75, connecting gap 76, rotating button handle 8. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-8 As shown, a multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings includes a shaft base 2 symmetrically arranged on two adjacent sides of a window frame 1, an inner wall of the window frame 1 is provided with a connecting base 3 for the shaft base 2, the inner side of the window frame 1 can be opened and closed by symmetrically arranged window sashes 11, the shaft bases 2 are connected by a coaxial screw 4, a crankshaft assembly 5 is sleeved between one end of the coaxial screw 4 and the shaft base 2, the end of the crankshaft assembly 5 away from the shaft base 2 is connected to a sash fixed angle code 12 through a flip shaft structure 6, and the sash fixed angle code 12 is connected to the window sash 11 in the window frame 1 and is linked to flip through the flip shaft structure 6.

[0030] Among them, the crank arm rotating shaft assembly 5 includes a rotating shaft sleeve 51 arranged at one end and a flip shaft hole 52 arranged at the other end, a linkage long shaft arm 53 is arranged on the rotating shaft sleeve 51, and a linkage short shaft arm 54 is arranged at one end of the linkage long shaft arm 53 away from the rotating shaft sleeve 51, the linkage long shaft arm 53 and the linkage short shaft arm 54 are formed integrally with each other and an angle is formed therebetween, and the flip shaft hole 52 is arranged on the linkage short shaft arm 54.

[0031] The crank arm pivot assembly 5 is in a three-fold line shape and its two ends are respectively connected to the shaft rod of the pivot base 2 and the window sash fixed angle code 12. By disassembling the movement stroke of the window sash 11 by moving it horizontally perpendicular to the direction of the window sash 11 facing and rotating the window sash 90° outward along the end of the linkage short axis arm 54, the smooth opening of the special-shaped concave rescue window can be achieved.

[0032] Obviously, flip limit clamps 541 are provided on both sides of the linkage short axis arm 54, and a flip stroke limit seat 121 corresponding to the flip limit clamp 541 is provided on the fixed angle code 12 of the window sash, and rotation limit clamps 531 are provided on both sides of the linkage long axis arm 53, and a rotation stroke limit seat 21 corresponding to the rotation limit clamp 531 is provided on the rotating shaft base 2.

[0033] The window sash 11 is in an initial closed state by engaging the rotation limit clamp 531 with the rotation travel limit seat 21 on the shaft base 2 and the flip travel limit seat 121 on the window sash fixed angle code 12 with the flip limit clamp 541 on both sides of the linkage short axis arm 54, and the axis of the crank arm shaft assembly 5 forms an angle of 18° with the finished surface of the window sash 11.

[0034] Furthermore, a rotating sleeve 51 at one end of the crankshaft shaft assembly 5 is rotatably sleeved on the shaft rod of the shaft base 2, and a nylon pad 22 is provided between one side of the rotating sleeve 51 and the shaft base 2, and a stainless steel pad 23 for positioning the rotating sleeve 51 is provided on the coaxial screw and located on the other side of the rotating sleeve 51, a locking nut 24 is provided on one side of the stainless steel pad 23, and a compression spring 25 is provided between the locking nut 24 and the stainless steel pad 23.

[0035] The nylon pad 22 is used to buffer the friction between the rotating sleeve 51 and the rotating shaft base 2, and the stainless steel pad 23 is used to buffer the positioning of one side of the rotating sleeve 51 when the rotating sleeve 51 rotates.

[0036] Furthermore, the flip axis structure 6 includes a rotating axis screw 61, which is inserted into the flip axis hole 52, and a positioning nut 62 for positioning the linkage short axis arm 54 is provided on the rotating axis screw 61 and on both sides of the flip axis hole 52, and a metal anti-friction pad 63 is provided between one end of the upper positioning nut 62 and the window sash fixing angle code 12, and a spring pad 64 is provided between the metal anti-friction pad 63 and the upper positioning nut 62 and between the lower positioning nut 62 and the linkage short axis arm 54.

[0037] The flip shaft structure 6 is mainly used to lock the position of the linkage short shaft arm 54 and enable the rotating shaft screw 6 to rotate in the flip shaft hole 52 to achieve the flipping of the window sash 11.

[0038] Specifically, the connecting base 3 includes an L-shaped vertically arranged connecting portion 31, one end of the connecting portion 31 is provided with a fixing portion 32 connected to the window frame 1, and the above-mentioned rotating shaft base 2 is connected to the outer wall of one side of the connecting portion 31, and the outer wall of the other side of the connecting portion 31 is connected to a guiding and positioning cross frame 33, the other end of the guiding and positioning cross frame 33 is connected to the connecting portion 31 for positioning different rotating shaft bases 2, and the bottom of the guiding and positioning cross frame 33 is provided with a guiding and positioning connecting member 7 for guiding and positioning the window sash 11.

[0039] More specifically, the guide positioning connecting member 7 is arranged in an inverted Z shape, and the upper end of the guide positioning connecting member 7 has an upper vertical portion 71 that is in contact with one side of the guide positioning cross frame 33, and the lower end of the guide positioning connecting member 7 is provided with a lower vertical portion 72 that is connected to the side wall of the window sash 11, and the upper vertical portion 71 and the lower vertical portion 72 are connected by a horizontal portion 73.

[0040] The guiding and positioning connecting member 7 is used to guide the translational movement of the window sash 11 and to position the window sash 11 when it is closed.

[0041] In detail, the horizontal portion 73 is connected to the upper end of the window sash 11 through a connecting nut 74, a clearance gap 75 is formed between the upper vertical portion 71 and the horizontal portion 73 for the guide positioning cross frame 33 to pass through, and a connecting gap 76 is formed between the lower vertical portion 72 and the horizontal portion 73 for one end of the window sash 11 to be inserted.

[0042] Preferably, a rotating button handle 8 is provided on the window sash fixing angle code 12 or the window sash 11 .

[0043] In addition, one end of the coaxial screw 4 is connected to the shaft of the shaft base 2 through a nut sleeve 41. The coaxial screw 4 is synchronously connected to the shaft base 2 through the nut sleeve 41, so that the wire crank arm shaft assembly 5 is coaxial, and the window sash fixed angle code 12 is connected to the window sash 11 to form a rescue window system.

[0044] like Fig. 9 As shown, a symmetrically arranged rotating drive motor 42 is provided on the partition frame in the window frame 1, and the output ends of the rotating drive motor 42 are respectively connected to linkage rods 44 through linkage gear structures 43, and one end of the linkage rod 44 away from the output end of the rotating drive motor 42 is connected to the corresponding coaxial screw 4 through a bevel gear structure 45.

[0045] By rotating the driving motor 42, the window sashes 11 on both sides can be driven to rotate independently or to open in sequence.

[0046] Embodiment 1

[0047] During the translation stroke, the corresponding crank shaft assembly 5 is rotated by pulling the rotating button handle 8, so that the window sash 11 moves parallel to the lower side, so that the window sash 11 is separated from the window frame 1, and the motion trajectory of the translation stroke one is ended.

[0048] Embodiment 2

[0049] During the translation stroke, the corresponding coaxial screw 4 is driven to rotate by rotating the drive motor 42, and the coaxial screw 4 drives the shaft of the shaft base 2 to move synchronously, so that the window sash 11 connected to the crank shaft assembly 5 moves parallel to the lower side, so that the window sash 11 is separated from the window frame 1, and the motion trajectory of the translation stroke one ends. In order to avoid collision when the window sashes 11 on both sides are translated at the same time, they can be started successively, that is, when one of the window sashes 11 completes the rotation stroke two, the other window sash 11 performs the step of translation stroke one.

[0050] Two translational driving modes are provided, namely, manually pulling the rotating button handle 8 and rotating the driving motor 42 for electric driving. When the rotating driving motor 42 is powered off, the translational travel driving can be performed by manually pulling the rotating button handle 8, thereby improving the opening safety of the sash 11 of the rescue window. Secondly, when the sashes 11 on both sides are opened, they are opened in sequence to avoid collision during synchronous linkage starting.

[0051] In summary, the principle of this embodiment is:

[0052] Translational stroke one: by pulling the rotating button handle 8 or by rotating the drive motor 42, the crank arm shaft assembly 5 is forced to rotate 45° counterclockwise along the shaft of the shaft base 2, and the shaft base 2 of the crank arm shaft assembly 5 contacts the limit, and the motion trajectory of the translational stroke one is ended by rotating the stroke limit seat 21. At this time, the window sash 11 is parallel to the direction of the window sash 11 facing surface, and moves 89mm to the right, and 105mm outward perpendicular to the direction of the window sash 11 facing surface. The crank arm shaft assembly 5 and the crank arm shaft assembly 5 in the initial state of the window sash 11 closing are at an angle of 45°. After completing the first translation stroke, the crank arm shaft assembly 5 and the finished surface of the window sash 11 facing surface are at an angle of 63°. The edge of the window sash 11 moves along the stroke trajectory. The first translation stroke is a two-way coupling stroke perpendicular to and parallel to the window sash 11 facing surface. The purpose of setting this stroke is to force the window sash 11 with a relief shape to protrude from the original building opening, so that the shaft of the window sash 11 is externalized, creating rotation conditions for the next stage of rotation stroke two.

[0053] Rotation stroke two: the window sash 11 can be held at the rightmost side with the right hand, and the crank arm shaft assembly 5 does not move during this stroke. The window sash 11 is rotated clockwise along the connection between the crank arm shaft assembly 5 and the window sash fixed angle code 12. When the angle between the crank arm shaft assembly 5 and the facing of the window sash 11 is 153°, the flip stroke limit seat 121 of the window sash fixed angle code 12 contacts the flip limit clips 541 on both sides of the linkage short axis arm 54, and the rotation stroke two stops. The window sash 11 and the crank arm shaft assembly 5 form an angle of 153°, and the vertical stroke trajectory of the right edge of the window sash 11 presents a 90° fan shape, thereby completing a multi-stage coupled stroke movement. The rescue window has achieved 90° opening, which not only meets the requirements for building opening and passage, but also maximizes the perfect unity of the rescue window and the building texture.

[0054] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0055] Although this article uses more window frames 1, window sashes 11, window sash fixing angle codes 12, flip travel limit seats 121, shaft bases 2, rotation travel limit seats 21, nylon pads 22, stainless steel pads 23, locking nuts 24, compression springs 25, connecting bases 3, connecting parts 31, fixing parts 32, guide positioning cross frames 33, coaxial screw rods 4, nut sleeves 41, rotating drive motors 42, linkage gear structures 43, linkage rods 44, bevel gear structures 45, crankshaft shaft components 5 , rotating sleeve 51, flip shaft hole 52, linkage long shaft arm 53, limit clamp 531, linkage short shaft arm 54, flip limit clamp 541, flip shaft structure 6, rotating shaft screw 61, positioning nut 62, metal anti-friction pad 63, spring pad 64, guide positioning connector 7, upper vertical part 71, lower vertical part 72, horizontal part 73, connecting nut 74, clearance gap 75, connection gap 76, rotating button handle 8 and other terms, but the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A multi-stroke coupled crankshaft shaft suitable for fire rescue windows of special-shaped buildings, comprising shaft bases (2) symmetrically arranged on two adjacent sides of a window frame (1), the inner wall of the window frame (1) is provided with a connecting base (3) for the shaft base (2), the inner side of the window frame (1) can be opened and closed by symmetrically arranged window sashes (11), characterized in that: The rotating shaft bases (2) are connected via a coaxial screw (4); a crankshaft rotating shaft assembly (5) is sleeved between one end of the coaxial screw (4) and the rotating shaft base (2); one end of the crankshaft rotating shaft assembly (5) away from the rotating shaft base (2) is connected to a window sash fixing angle code (12) via a flip shaft structure (6); and the window sash fixing angle code (12) is connected to a window sash (11) in a window frame (1) and is linked to flip through the flip shaft structure (6).

2. According to claim 1, a multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings, the crankshaft assembly (5) includes a rotating shaft sleeve (51) arranged at one end and a flip shaft hole (52) at the other end, a linkage long shaft arm (53) is provided on the rotating shaft sleeve (51), and a linkage short shaft arm (54) is provided at the end of the linkage long shaft arm (53) away from the rotating shaft sleeve (51), the linkage long shaft arm (53) and the linkage short shaft arm (54) are formed integrally with each other and form an angle between them, and the flip shaft hole (52) is provided on the linkage short shaft arm (54).

3. According to the multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings as described in claim 2, flip limit clamps (541) are provided on both sides of the linkage short axis arm (54), and a flip stroke limit seat (121) corresponding to the flip limit clamp (541) is provided on the window sash fixed angle code (12), rotation limit clamps (531) are provided on both sides of the linkage long axis arm (53), and a rotation stroke limit seat (21) corresponding to the rotation limit clamp (531) is provided on the shaft base (2).

4. According to claim 3, a multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings, the rotating sleeve (51) at one end of the crankshaft assembly (5) is sleeved on the shaft of the shaft base (2), and a nylon pad (22) is provided between one side of the rotating sleeve (51) and the shaft base (2), and a stainless steel pad (23) for positioning the rotating sleeve (51) is provided on the coaxial screw and located on the other side of the rotating sleeve (51), a locking nut (24) is provided on one side of the stainless steel pad (23), and a compression spring (25) is provided between the locking nut (24) and the stainless steel pad (23).

5. According to a multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings as described in claim 3, the flip shaft structure (6) includes a shaft screw (61), the shaft screw (61) is inserted into the flip shaft hole (52), and a positioning nut (62) for positioning the linkage short shaft arm (54) is provided on the shaft screw (61) and on both sides of the flip shaft hole (52), and a metal anti-friction pad (63) is provided between one end of the upper positioning nut (62) and the window sash fixing angle code (12), and spring pads (64) are provided between the metal anti-friction pad (63) and the upper positioning nut (62) and between the lower positioning nut (62) and the linkage short shaft arm (54).

6. According to claim 1, a multi-stroke coupled crankshaft suitable for fire rescue windows of special-shaped buildings, the connecting base (3) includes an L-shaped vertically arranged connecting portion (31), one end of the connecting portion (31) is provided with a fixing portion (32) connected to the window frame (1), and the above-mentioned rotating shaft base (2) is connected to the outer wall of one side of the connecting portion (31), the outer wall of the other side of the connecting portion (31) is connected to a guiding and positioning cross frame (33), the other end of the guiding and positioning cross frame (33) is connected to the connecting portion (31) used for positioning different rotating shaft bases (2), and the bottom of the guiding and positioning cross frame (33) is provided with a guiding and positioning connecting member (7) for guiding and positioning the window sash (11).

7. According to claim 6, a multi-stroke coupled crankshaft adapted for fire rescue windows of special-shaped buildings, the guide positioning connecting member (7) is arranged in an inverted Z shape, and the upper end of the guide positioning connecting member (7) has an upper vertical portion (71) that is mutually fitted with one side of the guide positioning cross frame (33), and the lower end of the guide positioning connecting member (7) is provided with a lower vertical portion (72) connected to the side wall of the window sash (11), and the upper vertical portion (71) and the lower vertical portion (72) are connected by a horizontal portion (73).

8. According to the multi-stroke coupled crankshaft adapted for fire rescue windows of special-shaped buildings as described in claim 7, the horizontal portion (73) is connected to the upper end of the window sash (11) through a connecting nut (74), a clearance gap (75) is formed between the upper vertical portion (71) and the horizontal portion (73) for the guide positioning cross frame (33) to pass through, and a connection gap (76) is formed between the lower vertical portion (72) and the horizontal portion (73) for one end of the window sash (11) to be inserted.

9. According to the multi-stroke coupled crankshaft adapted for fire rescue windows of special-shaped buildings as described in claim 1, a rotating button handle (8) is provided on the window sash fixed angle code (12) or the window sash (11); one end of the coaxial screw rod (4) is connected to the shaft of the shaft base (2) through a nut sleeve (41).

10. According to a multi-stroke coupled crank arm shaft suitable for fire rescue windows of special-shaped buildings as described in claim 1, a partition frame in the window frame (1) is provided with a symmetrically arranged rotation drive motor (42), and the output end of the rotation drive motor (42) is respectively connected to a linkage rod (44) through a linkage gear structure (43), and the end of the linkage rod (44) away from the output end of the rotation drive motor (42) is connected to the corresponding coaxial screw (4) through an umbrella gear structure (45), and one end of one linkage rod (44) away from the coaxial screw (4) is provided with a linkage plug (46), and the other linkage rod (44) away from the coaxial screw ( 4) is slidably provided at one end thereof with a sliding linkage plug rod (47) corresponding to the connecting plug cylinder (46), a plurality of rotation positioning slots (461) are provided in the linkage plug cylinder (46), a plurality of rotation positioning convex ribs (471) corresponding to the rotation positioning slots (461) are provided on the circumferential outer wall of the sliding linkage plug rod (47), and an end of the sliding linkage rod (44) away from the linkage plug cylinder (46) is slidably provided on the circumferential inner side of the linkage rod (44) and a sliding push button (472) exposed from the linkage rod (44) is circumferentially provided, and a sliding travel limiting groove (473) for limiting the sliding push button (472) is provided on the linkage rod (44).

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