A center distance adjustable transmission shell and a door and window structure

Abstract

The application discloses a center distance adjustable transmission shell and a door and window structure, and the center distance adjustable transmission shell comprises a transmission shell upper part and a transmission shell lower part; the transmission shell upper part is rotationally provided with a driving piece and a first transmission piece, the driving piece is in transmission connection with the first transmission piece, the transmission shell lower part is provided with a second transmission piece in transmission connection with the first transmission piece and at least one transmission rod in transmission connection with the second transmission piece, and an adjustment section is arranged between the first transmission piece and the second transmission piece; the distance from the center of the driving piece to the transmission shell lower part is adjustable in the adjustment section, and the first transmission piece is always in matched connection with the second transmission piece. The application sets the adjustment section between the first transmission piece and the second transmission piece, realizes the quick adjustment of the center distance in the adjustment section, ensures the normal transmission of the transmission shell, promotes the standardization of the transmission shell, reduces the burden of material management, and reduces the manufacturing cost and the material management cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of doors and windows, in particular to a center distance adjustable transmission shell and door and window structure. BACKGROUND

[0002] In the door and window lock system, the transmission shell is an important existence, as a conversion device of different motion forms, is indispensable. In order to realize the opening and closing of the door and window, it is usually necessary to rotate the handle to drive the transmission shell, and the transmission shell is connected with the lock element on the door and window through the aluminum rod to switch the door and window between opening and closing. The common transmission shell is fixed in center distance, and the center distance refers to the distance from the contact surface of the transmission shell to the center of the driving wheel. In order to meet the needs of different center distances, it is usually necessary to make transmission shells with different center distances, resulting in high manufacturing cost and high material management cost. SUMMARY

[0003] The purpose of the present application is to provide a center distance adjustable transmission shell and door and window structure, which aims to solve the problems of high manufacturing cost and high material management cost in the prior art.

[0004] The embodiment of the present application provides a center distance adjustable transmission shell, which comprises a transmission shell upper part and a transmission shell lower part; the transmission shell upper part is rotationally provided with a driving member and a first transmission member, the driving member is in transmission connection with the first transmission member, the transmission shell lower part is provided with a second transmission member in transmission connection with the first transmission member and at least one transmission rod in transmission connection with the second transmission member,

[0005] An adjustment section is arranged between the first transmission member and the second transmission member, the distance from the center of the driving member to the transmission shell lower part is adjustable in the adjustment section, and the first transmission member is always in matched connection with the second transmission member.

[0006] Further, the adjustment section is arranged at the upper end of the second transmission member, and the lower end of the first transmission member is provided with a matched hole in sliding insertion with the adjustment section and capable of driving the second transmission member; or the adjustment section is arranged at the lower end of the first transmission member, and the upper end of the second transmission member is provided with a matched hole in sliding insertion with the adjustment section and capable of driving the first transmission member.

[0007] Further, the transmission shell upper part comprises a fixed member and a movable part, the driving member and the first transmission member are arranged on the movable part, the lower end of the fixed member is fixedly connected with the transmission shell lower part, and the upper end of the fixed member is in up-down movable connection with the movable part, so as to adjust the distance from the center of the driving member to the transmission shell lower part.

[0008] Further, the upper end of the fixing member is provided with an inner cavity, the lower end of the movable component is provided with a matching section, the matching section is movably arranged in the inner cavity, and the fixing member and the matching section are detachably connected through a first fastener.

[0009] Further, a plurality of adjusting pieces are arranged between the movable component and the fixing member, and are used for adjusting the distance between the movable component and the fixing member.

[0010] Further, the first transmission member is a bevel gear shaft, the second transmission member is a cylindrical gear shaft, the driving member is provided with an incomplete bevel gear, the incomplete bevel gear is meshed with a bevel gear of the bevel gear shaft, and the transmission rod is provided with a rack, and the rack is meshed with a cylindrical gear of the cylindrical gear shaft.

[0011] Further, the transmission rod is provided with one rack, the rack is meshed with the cylindrical gear, and the cylindrical gear is used for driving the linear motion of the transmission rod.

[0012] Further, the movable component comprises a first shell and a second shell covering the first shell, the first shell and the second shell are oppositely provided with first positioning parts, each first positioning part is horizontally provided with a positioning groove, an outer wall of the bevel gear shaft is horizontally provided with a positioning ring rotatably connected in the positioning groove, and the bevel gear shaft and the positioning groove are rotatably connected through the positioning ring.

[0013] Further, the lower part of the transmission shell further comprises a cover plate and a fixing plate, the transmission rod is arranged on the cover plate, the fixing plate is arranged above the transmission rod and is fixedly connected with the cover plate, the fixing plate is fixedly connected with the upper part of the transmission shell, and the fixing plate is provided with a first circular hole for positioning and limiting the cylindrical gear shaft.

[0014] Further, the fixing member is provided with a second positioning part with a second circular hole, and the second circular hole is used for positioning and limiting the cylindrical gear shaft.

[0015] The embodiment of the present application also provides a door and window structure comprising the above-mentioned center distance adjustable transmission shell.

[0016] The embodiment of the application discloses a center distance adjustable transmission shell and a door and window structure, the center distance adjustable transmission shell comprising: a transmission shell upper part and a transmission shell lower part; the transmission shell upper part is rotationally provided with a driving piece and a first transmission piece, the driving piece is in transmission connection with the first transmission piece, the transmission shell lower part is provided with a second transmission piece in transmission connection with the first transmission piece and at least one transmission rod in transmission connection with the second transmission piece, an adjustment section is arranged between the first transmission piece and the second transmission piece, the distance from the center of the driving piece to the transmission shell lower part is adjustable in the adjustment section, and the first transmission piece is always in matched connection with the second transmission piece. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0018] Figure 1 It is an exploded view of the center distance adjustable transmission shell of the embodiment;

[0019] Figure 2 It is an exploded view of the transmission shell upper part of the embodiment;

[0020] Figure 3 It is an exploded view of the movable part of the embodiment;

[0021] Figure 4 It is a structural schematic view of the first shell and the second shell of the embodiment;

[0022] Figure 5 It is an exploded view of the transmission shell lower part of the single transmission rod;

[0023] Figure 6 It is an exploded view of the transmission shell lower part of the double transmission rod (with a fixed plate);

[0024] Figure 7 It is a structural schematic view of the first transmission piece of the embodiment;

[0025] Figure 8 It is a structural schematic view of the second transmission piece of the embodiment;

[0026] Figure 9 It is a structural schematic view of the first transmission piece of an embodiment;

[0027] Figure 10Structure diagram of the second transmission member of one embodiment;

[0028] Figure 11 Main view of the center distance adjustable transmission housing of the embodiment;

[0029] Figure 12 Exploded view of the center distance adjustable transmission housing of one embodiment;

[0030] Figure 13 Structure diagram of the driving member of the embodiment;

[0031] Figure 14 Exploded view of the lower part of the transmission housing of one embodiment (without the fixing plate);

[0032] Figure 15 Structure diagram of the fixing member of the embodiment;

[0033] Figure 16 Top view of Figure 15 ;

[0034] The reference signs are as follows:

[0035] 1, upper part of the transmission housing; 2, lower part of the transmission housing; 3, driving member; 4, first transmission member; 5, second transmission member; 6, transmission rod; 7, adjustment section; 8, matching hole; 9, fixing member; 10, movable part; 11, inner cavity; 12, matching section; 13, first fastener; 14, adjustment piece; 15, second fastener; 16, guide end; 17, incomplete bevel gear; 18, bevel gear; 19, rack; 20, cylindrical gear; 21, square mounting hole; 22, first housing; 23, second housing; 24, first positioning part; 25, positioning groove; 26, positioning ring; 27, cover plate; 28, fixing plate; 29, first circular hole; 30, cylindrical section; 31, second circular hole; 32, second positioning part; 33, riveting shaft; 34, anti-skewing member; 35, clamping block; 36, connecting screw; 37, anti-rattling block. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] It should be understood that the terms "comprises" and "comprising," when used in this specification and the following claims, indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0038] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in this specification and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0039] It should further be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items, and that the term "at least one of' encompasses one or more of the associated listed items.

[0040] Reference should be made to Figures 1-10 The present application provides a center distance adjustable transmission shell, comprising: a transmission shell upper part 1, a transmission shell lower part 2; the transmission shell upper part 1 is rotationally provided with a driving member 3 and a first transmission member 4, the driving member 3 is in transmission connection with the first transmission member 4, the transmission shell lower part 2 is provided with a second transmission member 5 in transmission connection with the first transmission member 4 and at least one transmission rod 6 in transmission connection with the second transmission member 5;

[0041] An adjustment section 7 is arranged between the first transmission member 4 and the second transmission member 5, in the adjustment section 7, the distance from the center of the driving member 3 to the transmission shell lower part 2 is adjustable, and the first transmission member 4 is always in matched connection with the second transmission member 5.

[0042] The working principle is as follows: when the user rotates the working handle, the working handle drives the driving member 3 to rotate, then the driving member 3 drives the first transmission member 4 to rotate, the first transmission member 4 drives the second transmission member 5 to rotate, the second transmission member 5 then drives the transmission rod 6 to move linearly, the transmission rod 6 then drives the aluminum rod to move, the aluminum rod drives the lock rod to separate from or match the lock seat, so as to realize the opening or locking of the door and window.

[0043] Further, the adjustment section 7 is arranged at the upper end of the second transmission member 5, and the lower end of the first transmission member 4 is provided with a matched hole 8 in slidable insertion with the adjustment section 7 and capable of driving the second transmission member 5; or the adjustment section 7 is arranged at the lower end of the first transmission member 4, and the upper end of the second transmission member 5 is provided with a matched hole 8 in slidable insertion with the adjustment section 7 and capable of driving the first transmission member 4.

[0044] The shape of the adjusting section 7 can be square, triangular, pentagonal or irregular, and the above shapes are only examples of the shape of the adjusting section 7, and the shape of the adjusting section 7 is not limited to the above shapes.

[0045] Further, the upper part of the transmission shell 1 comprises a fixed part 9 and a movable part 10, the driving part 3 and the first transmission part 4 are arranged on the movable part 10, the lower end of the fixed part 9 is fixedly connected with the lower part of the transmission shell 2, and the upper end of the fixed part 9 is movably connected with the movable part 10, so as to adjust the distance from the center of the driving part 3 to the lower part of the transmission shell 2, and within the adjusting range, the first transmission part 4 is always connected with the second transmission part 5.

[0046] In the embodiment, the movable connection between the fixed part 9 and the movable part 10 can adjust the center distance (the distance from the contact surface of the transmission shell and the profiled material to the center of the driving part 3, i.e. Figure 11 Within the adjustable range of the center distance, the first transmission part 4 is always connected with the second transmission part 5, so as to satisfy that the transmission shell can still open and close the door and window in the adjustable center distance.

[0047] The transmission rod 6 needs to be provided with at least one, and can be provided with two, and the two transmission rods 6 drive the aluminum rod to move, so as to open and close the door and window.

[0048] In the embodiment, the upper end of the fixed part 9 is provided with an inner cavity 11, the lower end of the movable part 10 is provided with a matching section 12, the matching section 12 is movably arranged in the inner cavity 11, and the fixed part 9 and the matching section 12 are detachably connected through the first fastener 13; or, the lower end of the movable part 10 is provided with an inner cavity 11, the upper end of the fixed part 9 is provided with a matching section 12, the matching section 12 is movably arranged in the inner cavity 11, and the movable part 10 and the matching section 12 are detachably connected through the first fastener 13, when the center distance needs to be adjusted, the first fastener 13 is removed, the center distance is adjusted to the appropriate position, that is, the position between the fixed part 9 and the movable part 10 is adjusted, and then the first fastener 13 is installed to realize the stable connection of the fixed part 9 and the movable part 10.

[0049] The first fastener 13 can be a screw, a threaded hole is formed in the wall surface of the inner cavity 11, and the number of the threaded hole can be determined according to the specific condition, when the fixed part 9 and the movable part 10 need to be fixed, the matching section 12 is pressed by the screw to realize the stable connection of the fixed part 9 and the movable part 10, or a plurality of adjusting holes are formed in the matching section 12, and the first fastener 13 is inserted into different adjusting holes to realize the stable connection of the fixed part 9 and the movable part 10.

[0050] In one embodiment, please refer to Figure 12A plurality of adjusting pieces 14 are arranged between the movable part 10 and the fixed part 9, for adjusting the distance between the movable part 10 and the fixed part 9; the movable part 10, the plurality of adjusting pieces 14 and the fixed part 9 are sequentially detachably connected through a second fastener 15, wherein the number of the adjusting pieces 14 can be 1, 2, 3…n, and the thickness can be uniform or non-uniform, the purpose of adjusting the center distance is achieved by adjusting the superimposed thickness of the adjusting pieces 14, and the second fastener 15 is generally a screw, which is used to realize the function of connecting the movable part 10, the plurality of adjusting pieces 14 and the fixed part 9 through cooperation with the threaded hole on the fixed part 9.

[0051] The movable part 10 is further provided with a guide end 16, which plays a guiding and positioning role when adjusting the center distance; the smaller the part of the guide end 16 extending into the inner cavity 11 of the fixed part 9, the larger the center distance of the transmission shell; when the guide end 16 completely enters the inner cavity 11 of the fixed part 9, the center distance of the transmission shell is the smallest.

[0052] The first transmission part 4 and the second transmission part 5 will be described in detail as follows:

[0053] Please refer to Figures 5-13 The first transmission part 4 is a bevel gear shaft, and the second transmission part 5 is a cylindrical gear shaft. The driving part 3 is provided with an incomplete bevel gear 17, the incomplete bevel gear 17 is engaged with a bevel gear 18 at the upper end of the bevel gear shaft, the transmission rod 6 is provided with a rack 19, the rack 19 is engaged with a cylindrical gear 20 at the lower end of the cylindrical gear shaft, and the driving part 3 is further provided with a square mounting hole 21 matched with the square shaft of the working handle.

[0054] The bevel gear shaft of the embodiment can convert the horizontal rotational motion of the driving part 3 into vertical rotational motion, and the cylindrical gear shaft can convert the vertical rotational motion transmitted by the bevel gear shaft into horizontal linear motion of the transmission rod 6 through the engagement of the cylindrical gear 20 and the rack 19. The embodiment realizes the conversion of the motion form from rotation to linear motion through the bevel gear shaft and the cylindrical gear shaft.

[0055] Please refer to Figure 5 The transmission rod 6 is provided with a rack 19 engaged with a cylindrical gear 20, and the cylindrical gear 20 is used to drive the linear motion of the transmission rod 6. The cylindrical gear 20 can drive the transmission rod 6 to move back and forth in the linear direction, and the back and forth movement of the transmission rod 6 drives the aluminum rod to move, and the aluminum rod drives the lock rod to separate from or cooperate with the lock seat, thereby realizing the opening or locking of the door and window; or, as Figure 6As shown, the transmission rod 6 is provided in parallel with two racks 19, which are respectively engaged with two sides of the cylindrical gear 20, and the cylindrical gear 20 is used to drive the two transmission rods 6 to move reversely, and the two transmission rods 6 can be moved linearly towards or away from each other by rotating the cylindrical gear 20, and the linear movement of the two transmission rods 6 drives the aluminum rod connected thereto to move, and the aluminum rod drives the lock rod to separate from or cooperate with the lock seat, so as to realize the opening or locking of the door and window.

[0056] In the embodiment, the movable part 10 comprises a first shell 22 and a second shell 23 covering the first shell 22, and the first shell 22 and the second shell 23 are respectively provided with a first positioning part 24, each first positioning part 24 is horizontally provided with a positioning groove 25, and the outer wall of the bevel gear shaft is horizontally provided with a positioning ring 26 rotatably connected in the positioning groove 25, and the bevel gear shaft is rotatably connected with the positioning groove 25 through the positioning ring 26, that is, the bevel gear shaft is rotatably connected with the first shell 22 and the second shell 23 through the positioning groove 25 and the positioning ring 26.

[0057] The first shell 22 and the second shell 23 can be riveted and fixed, or can be welded, or can be connected by screws. Generally, the screws are selected for convenient disassembly and maintenance, and the maintenance cost is reduced.

[0058] Further, the transmission shell lower part 2 further comprises a cover plate 27 and a fixed plate 28, the transmission rod 6 is arranged on the cover plate 27, the fixed plate 28 is arranged above the transmission rod 6 and is fixedly connected with the cover plate 27, the fixed plate 28 is fixedly connected with the transmission shell upper part 1, and the fixed plate 28 is provided with a first circular hole 29 for positioning and limiting the cylindrical gear shaft, and the diameter of the first circular hole 29 is the same as or slightly larger than the diameter of the cylindrical section 30 on the cylindrical gear shaft.

[0059] In one embodiment, referring to Figures 14-16 , the fixing part 9 is provided with a second positioning part 32 with a second circular hole 31, and the second circular hole 31 is used for positioning and limiting the cylindrical gear shaft. When the second positioning part 32 with the second circular hole 31 is arranged on the fixing part 9, generally, the fixed plate 28 does not need to be arranged, and therefore the fixing part 9 and the cover plate 27 need to be fixed by a riveting shaft 33, and the design of the fixed plate 28 is cancelled to simplify the structure.

[0060] In the embodiment, the movable part 10 is further provided with a plurality of anti-skewing members 34 and sliding grooves matched with the anti-skewing members 34, which are used to avoid the deformation of the transmission shell caused by the action force of the screw when the transmission shell is fixed on the profile. When the screw is tightened, the action force of the screw will make the anti-skewing member 34 slide in the sliding groove, thereby avoiding the deformation of the transmission shell.

[0061] Further, the transmission shell is further provided with a clamping block 35 for fixing the transmission shell on the profile, the clamping block 35 is arranged above the transmission rod 6 and is in threaded connection with a connecting screw 36, when the connecting screw 36 rotates, the clamping block 35 will rotate, then the clamping block 35 is clamped with the profile, so as to realize the function of fixing the transmission shell on the profile.

[0062] Further, the transmission shell is further provided with an anti-ringing block 37, the anti-ringing block 37 is sleeved on the column connecting the transmission rod 6 and the aluminum rod, and plays a role in eliminating the gap between the transmission rod 6 and the aluminum rod, avoiding the sound when the transmission rod 6 is transmitted because of the gap between the column on the transmission rod 6 and the aluminum rod.

[0063] The cylindrical gear shaft and the bevel gear shaft in the bidirectional transmission transmission shell of the embodiment not only play the role of reversing but also play the role of driving the transmission rod 6; the setting of the bevel gear transmission mechanism greatly simplifies the internal structure of the traditional transmission shell; the telescopic matching structure of the cylindrical gear shaft and the bevel gear shaft realizes the adjustable center distance; since the adjustable center distance is realized, a series of transmission shells with different center distances can be made into one specification, thereby promoting the standardization of the transmission shell.

[0064] The application also provides a door and window structure comprising the adjustable center distance transmission shell of the above embodiment.

[0065] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts are referred to the method part. It should be pointed out that for ordinary skilled in the art, without departing from the principle of the application, the application can be improved and modified, and these improvements and modifications also fall within the protection scope of the claims of the application.

[0066] It should be further noted that in the specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive.

[0067] Comprise, when used that a process, method, article or apparatus comprises several elements or steps does not, unless specifically stated to the contrary, preclude the inclusion of other elements or steps, or the addition of other elements or steps, than those listed. The words comprises / comprising when used in a claim, stand-by themselves as open-ended, non- limiting words. The term comprising has the same meaning as including and includes, and is intended you be open, and not limiting.

Claims

1. An adjustable center distance drive housing, comprising: The transmission shell upper part and the transmission shell lower part; the transmission shell upper part is rotationally provided with a driving member and a first transmission member, the driving member is in transmission connection with the first transmission member, the transmission shell lower part is provided with a second transmission member in transmission connection with the first transmission member and at least one transmission rod in transmission connection with the second transmission member, characterized in that, The first transmission member and the second transmission member are provided with an adjusting section, in the adjusting section, the distance from the center of the driving member to the transmission shell lower part is adjustable, and the first transmission member is always in matched connection with the second transmission member; The adjusting section is arranged at the upper end of the second transmission member, and the lower end of the first transmission member is provided with a matched hole in sliding insertion with the adjusting section and capable of driving the second transmission member; or, the adjusting section is arranged at the lower end of the first transmission member, and the upper end of the second transmission member is provided with a matched hole in sliding insertion with the adjusting section and capable of driving the first transmission member.

2. The center distance adjustable transmission housing of claim 1, wherein, The transmission shell upper part comprises a fixed member and a movable member, the driving member and the first transmission member are arranged on the movable member, the lower end of the fixed member is fixedly connected with the transmission shell lower part, and the upper end of the fixed member is in up-and-down movable connection with the movable member, so as to adjust the distance from the center of the driving member to the transmission shell lower part.

3. The adjustable center distance drive housing of claim 2, wherein, The upper end of the fixed member is provided with an inner cavity, the lower end of the movable member is provided with a matched section, the matched section is arranged in up-and-down movable mode in the inner cavity, and the fixed member and the matched section are detachably connected through a first fastener; or, the lower end of the movable member is provided with an inner cavity, the upper end of the fixed member is provided with a matched section, the matched section is arranged in up-and-down movable mode in the inner cavity, and the movable member and the matched section are detachably connected through a first fastener.

4. The adjustable center distance drive housing of claim 2, wherein, A plurality of adjusting pieces are arranged between the movable member and the fixed member, for adjusting the distance between the movable member and the fixed member; the movable member, the plurality of adjusting pieces and the fixed member are sequentially detachably connected through a second fastener.

5. The adjustable center distance drive housing of claim 2, wherein, The first transmission member is a bevel gear shaft, the second transmission member is a cylindrical gear shaft, an incomplete bevel gear is arranged on the driving member, the incomplete bevel gear is in mesh with a bevel gear of the bevel gear shaft, and a rack is arranged on the transmission rod, the rack is in mesh with a cylindrical gear of the cylindrical gear shaft.

6. The adjustable center distance drive housing of claim 5, wherein, The transmission rod is provided with one rack in mesh with the cylindrical gear, and the cylindrical gear is used for driving the linear motion of the transmission rod; or, the transmission rod is provided with two racks in parallel, the racks are respectively in mesh with two sides of the cylindrical gear, and the cylindrical gear is used for driving the reverse motion of the two transmission rods.

7. The adjustable center distance drive housing of claim 5, wherein, The movable member comprises a first shell and a second shell covering the first shell, first positioning parts are arranged on the first shell and the second shell in opposite relation, a positioning groove is horizontally arranged on each first positioning part, an outer wall of the bevel gear shaft is horizontally provided with a positioning ring rotationally connected in the positioning groove, and the bevel gear shaft is rotationally connected with the positioning groove through the positioning ring.

8. The adjustable center distance drive housing of claim 5, wherein, The lower part of the transmission shell further comprises a cover plate and a fixing plate, the transmission rod is arranged on the cover plate, the fixing plate is arranged above the transmission rod and fixedly connected with the cover plate, the fixing plate is fixedly connected with the upper part of the transmission shell, and the fixing plate is provided with a first circular hole for positioning and limiting the cylindrical gear shaft.

9. The adjustable center distance drive housing of claim 5, wherein, The fixing member is provided with a second positioning portion with a second circular hole, and the second circular hole is used for positioning and limiting the cylindrical gear shaft.

10. A door and window structure, characterized by A center distance adjustable transmission shell comprising any one of claims 1-9.

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