Transmission box and window structure

Abstract

This application relates to the field of door and window structure technology, specifically disclosing a transmission box and door / window structure. The transmission box includes a gear and a rack; the gear has an elliptical arc segment on its outer periphery; multiple evenly spaced meshing teeth are arranged on the elliptical arc segment; the meshing teeth mesh with the rack. In this solution, because the meshing teeth are arranged on the elliptical arc segment, the tip circle radius of the meshing teeth changes with the radius of the elliptical arc segment, correspondingly causing the transmission ratio between the gear and the rack to change with the elliptical radius. When the rack meshes with a meshing tooth with a large tip circle radius, the torque required to rotate the gear is large, but the rack's stroke is long for the same rotation angle; when the rack meshes with a meshing tooth with a small tip circle radius, the torque required to rotate the gear is small, but the rack's stroke is short for the same rotation angle. This solves the problem that existing transmission boxes cannot simultaneously achieve both increased rotational stroke and low rotational torque.

Description

Technical Field

[0001] This application relates to the field of door and window structure technology, and in particular to a transmission box and door and window structure. Background Technology

[0002] In door and window structures, a transmission box is a device that uses the door and window handle to drive the internal gears to rotate, which in turn drives the rack to move, so that the locking points on the rack move closer to or further away from the lock seat, thereby controlling the locking and unlocking of the door and window lock points and lock seat.

[0003] When the locking point and lock seat are in contact, the friction and clamping force between them increase the rotational resistance of the gears, thereby increasing the torque of the door and window handle. To reduce the torque for locking and unlocking, the existing method is to reduce the gear ratio between the gear and rack by shrinking the gear. However, this method increases the rotational stroke of the door and window handle, causing inconvenience to the user. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a transmission box and door / window structure to solve the problem that existing transmission boxes cannot simultaneously achieve the goal of not increasing the rotational stroke and having a small rotational torque.

[0005] To achieve the above-mentioned technical objectives, the first aspect of this application provides a transmission box, including: a gear and a rack;

[0006] The outer periphery of the gear is provided with an elliptical arc segment;

[0007] The elliptical arc segment is provided with multiple meshing teeth that are evenly spaced.

[0008] The meshing teeth engage with the rack and are used to move the locking point connected to the rack closer to or away from the lock seat.

[0009] Furthermore, the elliptical arc segment is a standard elliptical arc segment.

[0010] Furthermore, the outer periphery of the gear is provided with an arc segment, and the arc segment is a standard arc segment.

[0011] Furthermore, the angle formed by the lines connecting the two endpoints of the elliptical arc segment to the center of the gear is 180°;

[0012] The angle formed by the lines connecting the two endpoints of the arc segment to the center of the gear is 180°.

[0013] Furthermore, the radius of the arc segment is smaller than the tip circle radius of the meshing tooth;

[0014] On the elliptical arc segment, grooves are provided on both sides of each meshing tooth;

[0015] The rack is provided with protruding teeth that correspond one-to-one with the plurality of tooth grooves.

[0016] Furthermore, the elliptical arc segments are symmetrically distributed about their own major axis, and the plurality of meshing teeth are symmetrically distributed on the elliptical arc segments.

[0017] Furthermore, the elliptical arc segment includes a middle segment and side segments located on both sides of the middle segment;

[0018] The tooth height of the meshing teeth on the middle section is less than the tooth height of the meshing teeth on the side section.

[0019] Furthermore, it also includes: transmission bars and support components;

[0020] The transmission bar is slidably mounted on the support member;

[0021] The rack is fixedly fitted into the transmission bar.

[0022] A second aspect of this application provides a door and window structure, including: a door and window body, a frame, a door and window handle, and a transmission box as described in any one of the above.

[0023] A lock seat is provided on the frame;

[0024] The main body of the door and window is movably connected to the frame;

[0025] The transmission box is located on the main body of the door and window, and the rack and pinion are connected to locking points;

[0026] The door and window handle is connected to a gear, which drives the gear to rotate and move the locking point closer to or away from the lock seat.

[0027] Furthermore, when the locking point and the locking seat are in the locked state, the meshing tooth with the smallest tip circle radius in the gear meshes with the rack.

[0028] As can be seen from the above technical solutions, this application provides a transmission box and a door / window structure. The transmission box includes a gear and a rack; the outer periphery of the gear is provided with an elliptical arc segment; the elliptical arc segment is provided with a plurality of evenly spaced meshing teeth; the meshing teeth are meshed with the rack.

[0029] In this design, because the meshing teeth are positioned on an elliptical arc segment, the tip circle radius of the meshing teeth changes with the radius of the ellipse, consequently altering the transmission ratio between the gear and rack. When the rack meshes with teeth having a large tip circle radius, the torque required to rotate the gear is high, but the rack's travel is long for the same rotation angle. Conversely, when the rack meshes with teeth having a small tip circle radius, the torque required to rotate the gear is low, but the rack's travel is short for the same rotation angle. Therefore, this design allows the transmission box to achieve a low-torque meshing state without increasing the total rack travel, solving the problem of existing transmission boxes being unable to simultaneously achieve both low torque and no increase in rotational travel. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A cross-sectional view of a transmission box in an unlocked state provided in an embodiment of this application;

[0032] Figure 2 A cross-sectional view of a transmission box during the locking / unlocking process provided in this application embodiment;

[0033] Figure 3 A schematic diagram of a transmission box with its gears and rack separated, provided for an embodiment of this application;

[0034] Figure 4 A perspective view of gears in a transmission box provided in an embodiment of this application;

[0035] Figure 5 A front view of a gear in a transmission box provided in an embodiment of this application;

[0036] Figure 6 A cross-sectional view of a transmission box when the gears and racks rotate to edge engagement, provided in an embodiment of this application;

[0037] Figure 7 A front view of a gear in a transmission box provided for another embodiment of this application;

[0038] Figure 8 A process diagram illustrating the removal of a portion of the meshing teeth from a gear in a transmission box, provided as an embodiment of this application;

[0039] Figure 9 An exploded view of a transmission box provided in an embodiment of this application;

[0040] Figure 10 This is a diagram illustrating the locking process of a door and window structure provided in an embodiment of this application.

[0041] In the picture:

[0042] 100. Gear; 101. Middle section; 102. Side section; 110. Elliptical arc segment; 111. Meshing tooth; 112. Tooth groove; 120. Circular arc segment;

[0043] 200. Rack; 210. Convex tooth;

[0044] 300. Transmission bar;

[0045] 400. Support components;

[0046] 500. Door and window handles;

[0047] 600. Lock base;

[0048] 700, Lock Point;

[0049] a: Radius of the tip circle of the meshing teeth; b: Radius of the arc segment. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0051] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0053] Please see Figures 1 to 4 In this application embodiment, a first aspect provides a transmission box, including a gear 100 and a rack 200. The gear 100 has an elliptical arc segment 110 on its outer periphery. The elliptical arc segment 110 refers to a curve that is part of an ellipse. The elliptical arc segment 110 has a plurality of evenly spaced meshing teeth 111; the meshing teeth 111 mesh with the rack 200. Since other components connected to the rack 200 and gear 100 in this embodiment can all be components from the prior art, they are not specifically shown in this embodiment. Generally, the rack 200 in this embodiment is the same as the racks in the prior art, and is connected to a locking point, so that when the gear 100 drives the rack 200 to move, it can move the locking point closer to or away from the lock seat to achieve locking or unlocking; the gear 100 is connected to a door / window handle, so that the door / window handle can drive the gear 100 to rotate.

[0054] In this application, the distance from any point on the elliptical arc segment 110 to the center of the ellipse (the center of the gear 100) is defined as the radius of the ellipse. The elliptical radius is different at the endpoints of the elliptical arc segment 110 at different positions. In an ellipse, the shortest elliptical radius is its minor axis; the longest elliptical radius is its major axis. In this embodiment, as the elliptical radius gradually increases along the direction from the minor axis to the major axis on the elliptical arc segment 110, the elliptical radius gradually increases; correspondingly, the addendum circle radius of the meshing teeth 111 increases sequentially along the direction from the minor axis to the major axis on the elliptical arc segment 110. The addendum circle radius of the meshing teeth 111 refers to the distance from the outermost end of the meshing teeth 111 to the center of the ellipse (the center of the gear 100), such as... Figure 3 The distance 'a' in the figure is shown.

[0055] When the meshing tooth 111 with a large tip circle radius meshes with the rack 200, the torque required to rotate the gear 100 is large, but the travel of the rack 200 is large when rotating by the same angle. When the meshing tooth 111 with a small tip circle radius meshes with the rack 200, the torque required to rotate the gear 100 is small, but the travel of the rack 200 is small when rotating by the same angle.

[0056] In existing transmission boxes, a circular gear and a rack mesh. The rotation angle for switching between locked and unlocked states of door and window handles is generally 90° or 180°. Taking 90° as an example, in existing transmission boxes, a 90° rotation of the door and window handle can drive the rack to move a distance d, and the rotational torque of the circular gear and rack remains constant during the rotation without considering external interference.

[0057] In one embodiment provided in this example, in order to meet the requirement of the same travel distance d, the elliptical arc segment 110 can be adapted such that the addendum circle radius of the meshing teeth 111 near the major axis region is larger than the radius of the existing circular gear, and the addendum circle radius of the meshing teeth 111 near the minor axis region is smaller than the radius of the existing circular gear, so that the travel distance of the rack 200 in the transmission box in this embodiment is also d when the door and window handle is rotated 90°.

[0058] Therefore, the transmission box provided in this embodiment can achieve a meshing state with low transmission torque without affecting the total stroke.

[0059] The engagement state with low transmission torque can be set according to actual needs. For example, to solve the problem of increased gear rotation resistance when the locking point and lock seat are in contact, the transmission box in this embodiment can be configured such that: when the locking point and lock seat are in contact, the meshing teeth 111 meshing with the rack 200 are meshing teeth 111 close to the short shaft; optionally, when the locking point and lock seat are in the locked state, the meshing teeth 111 meshing with the rack 200 are meshing teeth 111 with the smallest tip circle radius. In this way, since the transmission ratio of the gear 100 and the rack 200 is small at this time, the rotational torque is small, thereby reducing the locking and unlocking torque while keeping the overall rotational stroke of the door and window handle unchanged.

[0060] It should be noted that after the locking point and the lock seat separate, the meshing teeth 111 that engage with the rack 200 have a larger tip circle radius. Although the torque increases due to the increased transmission ratio, the rack 200 is in a free-sliding state without contacting the lock seat. Therefore, the user's perception of operating resistance does not increase significantly. Thus, in overall use, the transmission box provided in this embodiment reduces the user's operating resistance when locking and unlocking, without affecting the rotation stroke of the door / window handle or the operating resistance of the door / window handle after the locking point and lock seat separate, thereby optimizing the overall user experience.

[0061] Meanwhile, in daily life, with the constant locking and unlocking of doors and windows, collisions and wear inevitably occur between the locking points and the lock seat. The transmission box provided in this embodiment can reduce the sliding speed of the rack 200 during the locking phase of the door or window. Specifically, by reducing the transmission ratio, the sliding speed of the rack 200 is reduced when the door or window handle rotates at the same speed, thereby reducing the impact force when the locking points and lock seat contact each other, and extending their service life.

[0062] In other embodiments, such as in cases where the resistance to locking and unlocking is required to be as high as possible, the transmission box may also be configured such that, in the state of contact between the locking point and the locking seat, the rack 200 engages with the meshing tooth 111 with a larger tip circle radius, which will not be elaborated in this embodiment.

[0063] As a further improvement, the elliptical arc segment 110 is a standard elliptical arc segment, meaning that the elliptical arc segment 110 is a curve within a standard ellipse. Correspondingly, in this embodiment, the elliptical arc segment 110 and the multiple meshing teeth 111 all conform to the requirements of a standard elliptical gear; specifically, the projections of the elliptical arc segment 110 and the multiple meshing teeth 111 overlap with the projections of a standard elliptical gear of the same size. Since the dimensions, parameters, etc., of standard elliptical gears have unified standard specifications, using a standard elliptical arc segment helps to simplify and standardize component production.

[0064] In one embodiment, such as Figure 5 As shown, the outer periphery of gear 100 can all be elliptical arc segments 110, making gear 100 a standard elliptical gear.

[0065] In one embodiment, such as Figures 1 to 4 As shown, the outer periphery of the gear 100 is provided with an arc segment 120, and the arc segment 120 is a standard arc segment.

[0066] As mentioned above, the rotation stroke of door and window handles is generally 90° to 180°, so a portion of the outer periphery of gear 100 does not need to contact rack 200. In this embodiment, this portion of the outer periphery is set as an arc segment 120, which can reduce the possibility of interference between this area and other components during assembly.

[0067] In one implementation, the angle formed by the lines connecting the two endpoints of the elliptical arc segment 110 to the center of the gear 100 is 180°; the angle formed by the lines connecting the two endpoints of the circular arc segment 120 to the center of the gear 100 is 180°.

[0068] Specifically, the area traversed by the circular arc segment 120 on gear 100 forms a semicircle. The area traversed by the elliptical arc segment 110 forms a semi-elliptical gear. This structure facilitates the production of gear 100 by methods such as casting.

[0069] In one embodiment, see Figure 3 , Figure 4 and Figure 6 The radius b of the arc segment 120 is smaller than the radius a of the tip circle of the meshing tooth 111; on the elliptical arc segment 110, each meshing tooth 111 has a tooth groove 112 on both sides; the rack 200 has protruding teeth 210 that correspond one-to-one with the multiple tooth grooves 112.

[0070] In this embodiment, since each meshing tooth 111 has a tooth groove 112 on both sides, and the convex tooth 210 and the tooth groove 112 correspond one-to-one, when the gear 100 rotates to mesh with the edge of the rack 200, the outermost convex tooth 210 is just inserted into the outermost tooth groove 112. At this time, one side of the convex tooth 210 is the meshing tooth 111, and the other side is the arc segment 120. Since the radius b of the arc segment 120 is smaller than the tooth tip circle radius a of the meshing tooth 111, the gear 100 continues to rotate along the edge of the rack 200. Figure 6 The counterclockwise rotation in the middle can no longer move the rack 200, but here the gear 100 moves along... Figure 6 The clockwise rotation can still drive the rack 200 to the right slightly through the meshing teeth 111, thus preventing the rack 200 and gear 100 from running into a jammed state where they are completely disengaged.

[0071] In one embodiment, see Figure 7 When the rotation stroke of the door and window handle is 90°, the meshing tooth 111 can be set only on one side of the gear 100.

[0072] In another embodiment, such as Figure 3 As shown, the elliptical arc segment 110 is symmetrically distributed about its own major axis, and multiple meshing teeth 111 are symmetrically distributed on the elliptical arc segment 110.

[0073] In this embodiment, when the locking point and the locking seat are in the unlocked state, the gear 100 is located in the middle region of the rack 200, and the meshing teeth 111 on the major axis of the elliptical arc segment 110 mesh with the rack 200.

[0074] In this embodiment, the gear 100 has an overall axisymmetric structure, which is easy to manufacture and can prevent mistakes during assembly.

[0075] In one embodiment, see Figure 8 The elliptical arc segment 110 includes a middle segment 101 and side segments 102 located on both sides of the middle segment 101; the tooth height of the meshing teeth 111 on the middle segment 101 is less than the tooth height of the meshing teeth 111 on the side segments 102.

[0076] Specifically, since the meshing teeth 111 are located on the elliptical arc segment 110, the convex tooth structure on the rack 200 needs to match the curve of the elliptical gear. This results in a large curvature of the convex tooth structure on the rack 200, thereby increasing the longitudinal volume of the rack 200. In this embodiment, setting the height of the meshing teeth 111 on the middle segment 101 to be smaller can reduce the longitudinal space required for the convex tooth structure, which helps to miniaturize the rack 200.

[0077] It should be noted that, as Figure 8 In this embodiment, the meshing teeth 111 can be achieved by making a standard elliptical gear structure and then cutting off the meshing teeth 111 portion on the middle section 101.

[0078] In one embodiment, see Figure 9 The transmission box also includes: a transmission bar 300 and a support member 400; the transmission bar 300 is slidably disposed on the support member 400; and the rack 200 is fixedly fitted into the transmission bar 300.

[0079] In this embodiment, the support member 400 is a fixed member that can be fixed to the main body of the door or window. Simultaneously, the support member 400 may be provided with a sliding groove for the transmission bar 300 to slide. The transmission bar 300 connects to the locking point, so that when the rack 200 moves, it can drive the locking point to move via the transmission bar 300.

[0080] In this embodiment, the rack 200 and the transmission bar 300 are set separately, so that the rack 200 can be manufactured by casting or other methods and then assembled with the transmission bar 300, which facilitates the manufacturing of the rack 200. In this embodiment, the protruding tooth structure on the rack 200 can be arranged in an arc shape.

[0081] A second aspect of this application provides a door and window structure; please refer to [link / reference]. Figure 10 It includes: a door / window body, a frame, a door / window handle 500, and a transmission box for any of the above; a lock seat 600 is provided on the frame; the door / window body is movably connected to the frame; the transmission box is provided on the door / window body, and a rack 200 is connected to a locking point 700; the door / window handle 500 is connected to a gear 100, so as to drive the gear 100 to rotate and drive the locking point 700 to move closer to or away from the lock seat 600.

[0082] In this embodiment, the main body of the door or window can be a window, door, or other structure. The main body of the door or window can be connected to the frame by means of flipping, sliding, or other methods.

[0083] In this embodiment, when the locking point 700 and the locking seat 600 are in the locked state, the meshing tooth 111 with the smallest tip circle radius in the gear 100 meshes with the rack 200.

[0084] In the door and window structure provided in this embodiment, the door and window handle 500 can drive the locking point 700 and the lock seat 600 to lock and unlock during a 90° rotation stroke. Moreover, the torque required to rotate the door and window handle 500 during the locking and unlocking process is small, so the unlocking / locking resistance of the door and window handle 500 can be reduced without increasing the rotation stroke.

[0085] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although the present application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A transmission cassette, characterized in that, include: Gear (100) and rack (200); The outer periphery of the gear (100) is provided with an elliptical arc segment (110). The elliptical arc segment (110) is provided with a plurality of meshing teeth (111) that are evenly spaced. The meshing teeth (111) are meshed with the rack (200) to drive the locking point connected to the rack (200) closer to or further away from the lock seat.

2. The transmission cassette of claim 1, wherein, The elliptical arc segment (110) is a standard elliptical arc segment.

3. The transmission cassette of claim 2, wherein, The gear (100) has an arc segment (120) on its outer periphery, and the arc segment (120) is a standard arc segment.

4. The transmission box according to claim 3, characterized in that, The angle formed by the lines connecting the two endpoints of the elliptical arc segment (110) and the center of the gear (100) is 180°; The angle formed by the line connecting the two endpoints of the arc segment (120) and the center of the gear (100) is 180°.

5. The transmission cassette of claim 3, wherein, The radius of the arc segment (120) is smaller than the radius of the tip circle of the meshing tooth (111); On the elliptical arc segment (110), tooth grooves (112) are provided on both sides of each of the meshing teeth (111). The rack (200) is provided with protruding teeth (210) that correspond one-to-one with the plurality of tooth grooves (112).

6. The transmission cassette of any one of claims 1 to 5, wherein, The elliptical arc segment (110) is symmetrically distributed about its own major axis, and the plurality of meshing teeth (111) are symmetrically distributed on the elliptical arc segment (110).

7. The transmission cassette of claim 6, wherein, The elliptical arc segment (110) includes a middle segment (101) and side segments (102) located on both sides of the middle segment (101). The tooth height of the meshing tooth (111) on the middle section (101) is less than the tooth height of the meshing tooth (111) on the side section (102).

8. The transmission cassette of claim 1, wherein, Also includes: Drive bar (300) and support member (400); The transmission bar (300) is slidably disposed on the support member (400). The rack (200) is fixedly fitted into the transmission bar (300).

9. A door and window structure, characterized by include: The main body of the door and window, the frame, the door and window handle (500), and the transmission box as described in any one of claims 1 to 8; A lock seat (600) is provided on the frame. The main body of the door and window is movably connected to the frame; The transmission box is disposed on the door and window body, and the rack (200) is connected to the locking point (700). The door and window handle (500) is connected to a gear (100) to drive the gear (100) to rotate, thereby causing the locking point (700) to move closer to or further away from the lock seat (600).

10. The door and window structure according to claim 9, characterized in that, When the locking point (700) and the locking seat (600) are locked, the meshing tooth (111) with the smallest tip circle radius in the gear (100) meshes with the rack (200).

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