Overhead fan mounting structure and range hood

Abstract

The invention discloses an overhead fan mounting structure and a range hood, belongs to the technical field of kitchen appliances, and aims to solve the problems that an existing range hood is lack of a self-locking structure and the like. The invention discloses an overhead fan mounting structure which comprises a fan case and a fan cover. The winding assembly comprises a cable, a wheel set, a winding shaft and a driving device, and the driving device is used for driving the winding shaft to rotate around the axis of the winding shaft; one end of the cable is connected to the hanging disc, and the other end of the cable is connected to the wheel set; and when the driving device fails, the self-locking assembly can enable the winding shaft to stop rotating. According to the overhead fan mounting structure and the range hood disclosed by the invention, when the driving device drives the winding shaft to rotate around the axis of the winding shaft, part of the cable is wound on the wheel set, so that the fan case gradually gets close to the hanging disc, and the mounting is more convenient. When the driving device fails, the self-locking assembly can enable the winding shaft to stop rotating, the winding shaft is prevented from rotating reversely under the gravity effect of the fan case, and the fan case is prevented from falling off.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a top-mounted fan installation structure and a range hood. Background Art

[0002] A range hood is an appliance used to collect and discharge indoor cooking fumes. Its main working principle is to use a fan to generate negative pressure in the air inlet duct of the chassis. The fume gas enters the air inlet duct under the action of negative pressure and is then discharged outdoors or filtered.

[0003] The fan will generate noise when it is working. In order to improve the user experience, there is a split range hood system that places the fan in the ceiling, using the ceiling to block the fan noise from being transmitted to the user. The ceiling is located at a higher position in the room. In order to improve the stability of the installation, the fan system is usually installed on the top wall of the room, and then the ceiling is closed to block the fan.

[0004] To lift the fan to the top wall of the room and then fix it to the top wall of the room with bolts and other connectors, multiple people are required to operate, which is time-consuming and laborious. Some existing range hoods include a base, cables and a fan system. First, a lighter base is fixed to the top wall of the room, and then the fan system is lifted by cables until it is close to the base, and the fan system is fixed to the base with connectors. The defects of this range hood include: poor safety. When the motor rolls the cable to lift the fan system, if the motor fails, the fan system is at risk of falling. Summary of the invention

[0005] The purpose of the present invention is to provide a top-mounted fan installation structure and a range hood, which solves the problem that the existing range hoods lack a self-locking structure and are safer to use.

[0006] To achieve this object, on the one hand, the present invention adopts the following technical solutions:

[0007] The overhead fan installation structure includes: a fan chassis; a winding assembly, including a cable, a wheel group, a winding shaft and a driving device, the driving device is used to drive the winding shaft to rotate around its own axis; a hanging plate, one end of the cable is connected to the hanging plate, and the other end of the cable is connected to the wheel group; and a self-locking assembly, when the driving device fails, the self-locking assembly can stop the winding shaft from rotating.

[0008] In one of the preferred embodiments, the self-locking assembly includes a ratchet disk, a ratchet, a pawl and an elastic member, the ratchet is arranged on the inner wall of the ratchet disk, the ratchet disk is fixedly connected to the fan chassis, the pawl is movably connected to the winding shaft, and the elastic member has a tendency to push the pawl to cooperate with the ratchet.

[0009] In one preferred embodiment, the ratchet comprises a first ratchet and a second ratchet. The first ratchet and the second ratchet are respectively arranged on the inner wall of the ratchet disc along the axial direction of the winding shaft, and the tooth directions of the first ratchet and the second ratchet are opposite.

[0010] In one preferred embodiment, the pawl includes a first pawl and a second pawl, the first pawl cooperates with the first ratchet tooth, and the second pawl cooperates with the second ratchet tooth.

[0011] In one of the preferred embodiments, the pawl also includes a pawl seat, and a transmission column groove and an elastic member mounting portion respectively opened on the pawl seat, each pawl seat is provided with a first pawl or a second pawl, and the side wall surface of the transmission column groove close to the winding shaft forms a traction slope.

[0012] In one of the preferred embodiments, the winding assembly further includes a self-locking assembly accommodating member, the self-locking assembly accommodating member includes a transmission column, the transmission column is located in the transmission column slot and can move along the transmission column slot.

[0013] In one of the preferred embodiments, the self-locking assembly further comprises a winding shaft disk, a pawl slot is provided on the winding shaft disk, the pawl is provided in the pawl slot and can move along the extension direction of the pawl slot.

[0014] In one of the preferred embodiments, the driving device includes a driving motor, a driving gear and a driven gear, the driving gear is fixedly connected to the output end of the driving motor, the driving gear is meshed with the driven gear, and the driven gear can drive the winding shaft to rotate around its own axis.

[0015] In one of the preferred embodiments, a hanging groove is provided on the hanging plate, and the hanging groove includes a snap-in portion and a limit portion connected to each other, and the snap-in portion and the limit portion form an inverted L shape; a hanging nail is provided on the fan chassis, and the hanging nail includes a nail body and a nail head connected to each other, and the diameter of the nail body is smaller than the width of the hanging groove, and the diameter of the nail head is larger than the width of the hanging groove.

[0016] On the other hand, the present invention adopts the following technical solutions:

[0017] A range hood comprises the above-mentioned overhead fan installation structure.

[0018] The top-mounted fan installation structure disclosed in the present invention includes a fan chassis, a winding assembly, a hanging plate and a self-locking assembly. When the driving device drives the winding shaft to rotate around its own axis, part of the cable is wound on the wheel assembly, so that the fan chassis gradually approaches the hanging plate, and the installation is more convenient and labor-intensive. One installer can complete the installation of the range hood. When the driving device fails, the self-locking assembly can stop the winding shaft from rotating, preventing the winding shaft from rotating in the opposite direction under the gravity of the fan chassis, avoiding the fan chassis from falling, and making it safer to use.

[0019] The range hood disclosed in the present invention includes the above-mentioned top-mounted fan installation structure, which can automatically lift or lower the fan chassis. One installer can complete the installation of the range hood, which saves time and effort, has low labor intensity, and provides a good user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural schematic diagram of a range hood provided by a specific embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a hanging plate provided in a specific embodiment of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a fan chassis provided by a specific embodiment of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a hanging plate and a fan chassis provided in a specific embodiment of the present invention when they are not installed;

[0024] Figure 5 It is a schematic diagram of the structure after the hanging plate and the fan chassis are installed according to a specific embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of the combined structure of the hanging slot and the hanging nail provided in a specific embodiment of the present invention;

[0026] Figure 7 It is a structural schematic diagram of a self-locking assembly provided in a specific embodiment of the present invention;

[0027] Figure 8 is a schematic structural diagram of a first pawl provided in a specific embodiment of the present invention;

[0028] Fig. 9 is a schematic structural diagram of a second pawl provided in a specific embodiment of the present invention;

[0029] Fig.10 It is a structural schematic diagram of a self-locking assembly receiving member provided in a specific embodiment of the present invention;

[0030] Fig.11 It is a schematic diagram of the combined structure of a winding shaft and a winding shaft disk provided in a specific embodiment of the present invention;

[0031] Fig.12 is a schematic diagram of the combined structure of a ratchet and a pawl provided in a specific embodiment of the present invention;

[0032] Fig.13 is a front view of a combined structure of a ratchet and a pawl provided in a specific embodiment of the present invention;

[0033] Fig.14 yes Fig.13A partial enlarged view of the middle A;

[0034] Fig.15 and Fig.16 They are schematic diagrams of the relative position relationship between the second ratchet tooth and the second pawl provided in specific embodiments of the present invention;

[0035] Fig.17 yes Fig.13 A partial enlarged view of point B in the middle;

[0036] Fig.18 and Fig.19 They are schematic diagrams of the relative position relationship between the first pawl and the first ratchet tooth provided in specific embodiments of the present invention.

[0037] In the figure:

[0038] 1. Fan chassis; 2. Cable; 3. Wheel set; 4. Winding shaft; 5. Hanging plate; 6. Self-locking component; 7. Self-locking component accommodating part; 9. Connecting part; 11. Hanging nail; 12. Winding shaft mounting hole; 13. Bracket avoidance groove; 14. Cable hole; 31. First winding wheel; 32. Second winding wheel; 33. Pulley; 41. Elastic member limiting hole; 51. Hanging groove; 52. Hanging plate mounting hole; 54. Cable mounting bracket; 55. Flanging; 56. Fastening hole; 61. Ratchet plate; 62. Ratchet; 64. Elastic member; 65. Winding shaft plate; 66. Ratchet slide groove; 67. 7. Avoidance groove; 71. Transmission column; 72. Bottom surface; 73. Cylinder wall; 74. Accommodation member mounting hole; 81. Driving motor; 82. Driving gear; 83. Driven gear; 100. Smoking chamber; 111. Nail body; 112. Nail head; 200. Flexible connecting tube; 511. Insertion part; 512. Limiting part; 621. First ratchet; 622. Second ratchet; 631. First pawl; 632. Second pawl; 633. Pawl seat; 634. Transmission column groove; 635. Elastic member mounting part; 636. Traction slope; 661. Slide groove side wall. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0045] This embodiment discloses a top-mounted fan installation structure and a range hood including the top-mounted fan installation structure. Figure 1 As shown, the range hood further comprises a smoking chamber 100 and a flexible connecting pipe 200. The specific structures of the smoking chamber 100 and the flexible connecting pipe 200 are not limited, and the smoking chamber 100 and the flexible connecting pipe 200 in the prior art can be used in this embodiment.

[0046] like Figures 1 to 6 As shown, the overhead fan installation structure includes a fan chassis 1, a winding assembly, a hanging plate 5 and a self-locking assembly 6, wherein the hanging plate 5 is located above the fan chassis 1 and is fixed to the top wall of the room (not shown) by a connecting member 9 such as bolts, wherein the winding assembly includes a cable 2, a wheel set 3, a winding shaft 4 and a driving device, wherein the driving device is used to drive the winding shaft 4 to rotate around its own axis, one end of the cable 2 is connected to the hanging plate 5, and the other end of the cable 2 is connected to the wheel set 3.

[0047] When the driving device drives the winding shaft 4 to rotate around its own axis, part of the cable 2 is wound on the wheel set 3, so that the fan housing 1 gradually approaches the hanging plate 5, which makes the installation more convenient and labor-intensive. One installer can complete the installation of the range hood. When the driving device fails, the self-locking component 6 can stop the winding shaft 4 from rotating, preventing the winding shaft 4 from rotating in the opposite direction under the gravity of the fan housing 1, preventing the fan housing 1 from falling, and making it safer to use.

[0048] The specific structure of the driving device is not limited, as long as it can make the winding shaft 4 rotate around its own axis. In the present embodiment, the driving device includes a driving motor 81, a driving gear 82 and a driven gear 83, the driving gear 82 is fixedly connected to the output end of the driving motor 81, the driving gear 82 is meshed with the driven gear 83, and the driven gear 83 can drive the winding shaft 4 to rotate around its own axis. Among them, the driving motor 81 and the self-locking component 6 are respectively fixedly connected to the fan chassis 1, and can remain stationary relative to the fan chassis 1. The driving motor 81 transmits power to the winding shaft 4 through the driving gear 82 and the driven gear 83 to drive the winding shaft 4 to rotate around its own axis.

[0049] The whole composed of the wheel set 3, the winding shaft 4 and the driving device can be placed outside the fan chassis 1, which is more convenient to process and avoids interference with the structure inside the fan chassis 1, making it safer to use. The whole composed of the wheel set 3, the winding shaft 4 and the driving device can also be placed inside the fan chassis 1, and it is only necessary to ensure that it does not affect the normal use of the fan and other structures inside the fan chassis 1, thus saving space, making the range hood more beautiful in appearance and reducing noise.

[0050] The specific structure of the wheel set 3 is not limited, as long as it can reel in the cable 2 when the winding shaft 4 rotates around its own axis. In this embodiment, the wheel set 3 includes two groups of substructures respectively arranged at both ends of the winding shaft 4, each group of substructures includes a first winding wheel 31, a second winding wheel 32 and a pulley 33.

[0051] The pulley 33 is fixedly connected to the fan housing 1, and the first winding wheel 31 and the second winding wheel 32 are staggered and installed on the ends of the winding shaft 4 in sequence. The first winding wheel 31 and the pulley 33 on the same side are on the same plane, which is convenient for the winding of the cable 2. Specifically, there are two cables 2 corresponding to a group of substructures, one end of one cable 2 is fixedly connected to the hanging plate 5, and the other end is wound around the pulley 33 and then wound on the first winding wheel 31; one end of the other cable 2 is fixedly connected to the hanging plate 5, and the other end is wound around the second winding wheel 32. When the winding shaft 4 rotates around its own axis, the first winding wheel 31 and the second winding wheel 32 rotate synchronously with the winding shaft 4, and the cable 2 is increasingly wound around the first winding wheel 31 and the second winding wheel 32, and the cable 2 between the fan housing 1 and the hanging plate 5 becomes shorter and shorter, and the fan housing 1 gradually approaches the hanging plate 5, so that the fan housing 1 is lifted. When the winding shaft 4 rotates in the opposite direction around its own axis, the cable 2 is gradually released from the first winding wheel 31 and the second winding wheel 32, so that the fan housing 1 is lowered.

[0052] The specific connection method between the hanging plate 5 and the fan chassis 1 is not limited. In this embodiment, Figure 2 As shown, a hanging groove 51 is provided on one side of the hanging plate 5 close to the wall, and the hanging groove 51 includes a snap-in portion 511 and a stop portion 512 connected to each other, and the snap-in portion 511 and the stop portion 512 form an inverted L shape. Figures 3 to 6 As shown, a hanging nail 11 is provided on one side of the fan chassis 1 close to the wall, and the hanging nail 11 includes a nail body 111 and a nail head 112 connected to each other. The diameter of the nail body 111 is smaller than the width of the hanging groove 51, and the diameter of the nail head 112 is larger than the width of the hanging groove 51.

[0053] During installation, the nail body 111 enters the hanging groove 51 from the snap-in portion 511, moves up to the top, and then moves horizontally into the limiting portion 512. The bottom edge of the limiting portion 512 can prevent the nail body 111 from moving down, and the nail head 112 can prevent the nail body 111 from moving along the axial direction and escaping from the limiting portion 512, thereby achieving the snap connection between the fan chassis 1 and the hanging plate 5, solving the problem that the fan chassis 1 and the hanging plate 5 cannot be connected and fixed by screws on the side close to the wall, making it more convenient to use and the connection structure more stable.

[0054] Four mounting holes 52 are provided at the four top corners of the hanging plate 5. Bolts and other connecting parts 9 are passed through the hanging plate mounting holes 52 to fix the hanging plate 5 on the top wall of the room (not shown). The force on the hanging plate 5 is more uniform, the connection is more stable, and the load-bearing capacity is stronger. Fastening holes 56 are also provided on the hanging plate 5. Through holes (not shown) corresponding to the fastening holes 56 are provided on the fan chassis 1. Bolts and other connecting parts are passed through the hanging plate mounting holes 52 and the through holes on the fan chassis 1 to fix the hanging plate 5 and the fan chassis 1 together. The connection structure is stable and easy to disassemble and assemble.

[0055] The specific arrangement positions of the hanging groove 51 and the fastening hole 56 are not limited, as long as the hanging plate 5 and the fan chassis 1 can be stably connected. In this embodiment, at least part of the periphery of the hanging plate 5 is bent perpendicular to the plane where the hanging plate 5 is located to form a flange 55, and the hanging groove 51 and the fastening hole 56 are both provided on the flange 55. Among them, the hanging groove 51 is provided on the flange 55 close to the wall side, and the fastening hole 56 is provided on the flange 55 on the other side, which is convenient for processing, easy for disassembly and assembly, and stable for connection.

[0056] On the basis of the above structure, a winding shaft mounting hole 12 and a bracket avoidance groove 13 are provided on the fan chassis 1, and the two side ends of the winding shaft 4 are respectively inserted into the winding shaft mounting holes 12 which are relatively arranged on the fan chassis 1. The winding shaft mounting hole 12 can prevent the winding shaft 4 from moving in the radial direction, but does not affect the rotation of the winding shaft 4 around its own axis.

[0057] Four cable mounting brackets 54 are symmetrically arranged on the hanging plate 5, and each cable mounting bracket 54 is fixedly connected to a cable 2, so that the force on the fan chassis 1 is more balanced. The bracket avoidance groove 13 is aligned with the cable mounting bracket 54 to avoid the cable mounting bracket 54, ensuring that the fan chassis 1 can be close enough to the hanging plate 5 to save ceiling installation space. A cable hole 14 is opened at the bracket avoidance groove 13, and the cable hole 14 connects the inside of the fan chassis 1 to the outside. The cable 2 is inserted into the cable hole 14 to connect the wheel set 3 located in the fan chassis 1 to the hanging plate 5 located outside the fan chassis 1, and the structure is more reasonable.

[0058] The specific structure of the self-locking component 6 is not limited, as long as it can stop the winding shaft 4 from rotating when the driving device fails. Figure 7As shown, the self-locking assembly 6 includes a ratchet plate 61, a ratchet tooth 62, a pawl and an elastic member 64. The ratchet tooth 62 is arranged on the inner wall of the ratchet plate 61. The ratchet plate 61 is fixedly connected to the fan chassis 1 through a ratchet mounting seat (not shown). The pawl is movably connected to the winding shaft 4. The elastic member 64 has a tendency to push the pawl to cooperate with the ratchet tooth 62.

[0059] The conventional screw slider self-locking mechanism and the worm gear self-locking mechanism only allow the shaft to rotate in one direction (clockwise or counterclockwise), which is inconvenient to use. In order to solve this problem, in the present embodiment, the ratchet 62 includes a first ratchet 621 and a second ratchet 622, which are respectively arranged on the inner wall of the ratchet disc 61 along the axial direction of the winding shaft 4, and the first ratchet 621 and the second ratchet 622 have opposite tooth directions.

[0060] The self-locking assembly 6 composed of a ratchet 62 and a pawl can stop the rotation of the winding shaft 4 when the driving device fails. The two ratchet 62 structures with opposite teeth can work when the winding shaft 4 rotates clockwise and counterclockwise respectively, allowing the winding shaft 4 to choose clockwise rotation or counterclockwise rotation according to actual conditions. The fan chassis 1 can be lifted and lowered, which is more convenient to use.

[0061] Accordingly, if Figure 8 and Fig. 9 As shown, the pawl includes a pawl seat 633, a transmission column groove 634 and an elastic member mounting portion 635 respectively opened on the pawl seat 633, and a first pawl 631 and a second pawl 632. Specifically, each pawl seat 633 is provided with a first pawl 631 or a second pawl 632; the side wall surface of the transmission column groove 634 close to the winding shaft 4 forms a traction slope 636, and the traction slope 636 on the pawl seat 633 on which the first pawl 631 is installed is opposite to the inclination direction of the traction slope 636 on the pawl seat 633 on which the second pawl 632 is installed; the elastic member mounting portion 635 is used to fix the elastic member 64 to ensure that the fixed elastic member 64 is not easily separated from the pawl.

[0062] The first pawl 631 cooperates with the first ratchet tooth 621, and the second pawl 632 cooperates with the second ratchet tooth 622. The specific number of pawls is not limited. In this embodiment, two first pawls 631 and two second pawls 632 are included. The first pawls 631 and the second pawls 632 are arranged at intervals, and all the first pawls 631 and the second pawls 632 form a ring structure.

[0063] like Fig.10 As shown, the winding assembly also includes a self-locking assembly accommodating member 7, which includes a bottom surface 72 and a barrel wall 73 extending in a direction perpendicular to the bottom surface 72, the bottom surface 72 and the barrel wall 73 form a barrel-shaped structure with a single-sided opening (not shown), and the space enclosed by the bottom surface 72 and the barrel wall 73 is used to place the self-locking assembly 6.

[0064] A receiving member installation hole 74 is provided at the center of the bottom surface 72. A bearing (not shown) is passed through the receiving member installation hole 74. The winding shaft 4 is passed through the bearing to realize the movable connection between the self-locking component receiving member 7 and the winding shaft 4. Four transmission columns 71 are evenly arranged on the bottom surface 72 and evenly around the receiving member installation hole 74. The transmission columns 71 are located in the transmission column groove 634 and can move along the transmission column groove 634.

[0065] The specific location of the driven gear 83 is not limited, as long as it can drive the winding shaft 4 to rotate around its own axis. Figure 4 As shown, the driven gear 83 is arranged on the outer peripheral surface of the self-locking component receiving member 7, and the overall structure is more compact and saves space.

[0066] like Fig.11 As shown, the self-locking assembly 6 also includes a winding shaft disk 65 fixedly connected to the winding shaft 4, and four ratchet chute grooves 66 are arranged on the winding shaft disk 65 in a cross shape, and each ratchet is arranged in a ratchet chute 66 and can move along the extension direction of the ratchet chute 66. Specifically, the ratchet chute 66 is the area between two interval-arranged chute side walls 661, and the ratchet is arranged in the ratchet chute 66, and the chute side walls 661 on both sides can prevent the ratchet from moving sideways. The transmission column 71 is located in the transmission column groove 634, and the transmission column 71 is also located in the ratchet chute 66. When the transmission column 71 abuts against the chute side wall 661, the chute side wall 661 has a tendency to prevent the transmission column 71. However, when the force applied on the transmission column 71 is greater than the resistance of the winding shaft 4 to rotate around its own axis, the winding shaft 4 begins to rotate around its own axis, and the driven gear 83 drives the winding shaft 4 to rotate.

[0067] The winding shaft 4 is provided with an elastic member limiting hole 41, which corresponds to the bottom end of the ratchet slide groove 66. One end of the elastic member 64 is inserted into the elastic member mounting portion 635, and the other end is inserted into the elastic member limiting hole 41. The slide groove sidewalls 661 on both sides can prevent the elastic member 64 from moving sideways or bending, ensuring that the elastic member 64 can only push the ratchet along the extension direction of the ratchet slide groove 66.

[0068] The specific shapes and setting positions of the first pawl 631 and the second pawl 632 are not limited. Given that the first ratchet tooth 621 and the second ratchet tooth 622 are respectively arranged on the inner wall of the ratchet disk 61 along the axial direction of the winding shaft 4, the first pawl 631 and the second pawl 632 also need to be staggered along the axial direction of the winding shaft 4.

[0069] One method is: the first pawl 631 and the second pawl 632 are normally installed on the corresponding pawl seat 633 respectively, and the pawl seat 633 is staggered along the axial direction of the winding shaft 4, so that the first pawl 631 cooperates with the first ratchet tooth 621, and the second pawl 632 cooperates with the second ratchet tooth 622.

[0070] Another method is: all the pawl seats 633 are arranged in a ring shape on the outer periphery of the winding shaft 4, one of the first pawl 631 and the second pawl 632 is normally installed on the pawl seat 633 (the pawl and the pawl seat 633 both extend radially along the winding shaft 4), and the other of the first pawl 631 and the second pawl 632 is skewed relative to the pawl seat 633 (the pawl seat 633 extends radially along the winding shaft 4, and there is an angle between the extension direction of the pawl and the extension direction of the pawl seat 633), so that the first pawl 631 cooperates with the first ratchet tooth 621, and the second pawl 632 cooperates with the second ratchet tooth 622.

[0071] In order to prevent the skewed pawl from being retracted into the pawl slot 66, a relief groove 67 is provided at the top of the pawl slot 66. The specific shape and size of the relief groove 67 are not limited, as long as the pawl can be completely separated from the ratchet.

[0072] Fig.12 and Fig.13 The figure shows the overall structure after the pawl and the ratchet are assembled. The working principle of the self-locking component 6 is as follows: the driving motor 81 is started, and the driving motor 81 drives the driven gear 83 to rotate clockwise through the driving gear 82. The driven gear 83 is arranged on the outer periphery of the cylinder wall 73 of the self-locking component receiving part 7, so the self-locking component receiving part 7 can rotate synchronously with the driven gear 83.

[0073] like Fig.14 As shown, the transmission column 71 rotates around the axis of the driven gear 83, the pressing force F1 applied by the transmission column 71 on the traction inclined surface 636 of the second pawl 632 is reduced, and the second pawl 632 moves outward along the pawl sliding groove 66 under the thrust F3 of the elastic member 64; Fig.15 As shown, the transmission column 71 continues to slide along the transmission column slot 634, and the second pawl 632 continues to move outward along the pawl slot 66 under the push of the elastic member 64, and the second pawl 632 gradually approaches the second ratchet tooth 622. Fig.16As shown, the transmission column 71 slides along the transmission column groove 634 to the slide groove side wall 661, and the second pawl 632 is fully inserted into the second ratchet tooth 622. The transmission column 71 applies a thrust F2 to the slide groove side wall 661, and the slide groove side wall 661 rotates around the axis of the driven gear 83, and the winding shaft 4 is fixedly connected to the winding shaft disk 65, so the winding shaft 4 starts to rotate around the axis of the driven gear 83. At this time, the second pawl 632 and the second ratchet tooth 622 are in forward cooperation, and the second ratchet tooth 622 has no resistance to the second pawl 632, and the winding shaft 4 can rotate smoothly.

[0074] When the driving motor 81 loses power, the gravity of the fan housing 1 acts on the cable 2, and the cable 2 tends to pull the winding shaft 4 to rotate in the opposite direction. At this time, when the second pawl 632 is fully extended into the second ratchet 622, the reverse rotation trend of the winding shaft 4 causes the second pawl 632 to be in reverse cooperation with the second ratchet 622, thereby preventing the pulling winding shaft 4 from rotating in the opposite direction, and realizing self-locking.

[0075] like Fig.17 As shown, the transmission column 71 rotates around the axis of the driven gear 83, and the clamping force F1 applied by the transmission column 71 on the traction inclined surface 636 of the first pawl 631 increases, and the clamping force F1 is greater than the elastic force F3 of the elastic member 64, so the elastic member 64 is compressed, and the first pawl 631 moves toward the direction of the winding shaft 4, and the first pawl 631 begins to separate from the first ratchet tooth 621. Fig.18 As shown, the transmission column 71 continues to slide along the transmission column groove 634, the traction inclined surface 636 is continuously squeezed by the transmission column 71, and the first ratchet 631 and the first ratchet tooth 621 are gradually separated. Fig.19 As shown, the transmission column 71 slides to the end of the transmission column groove 634 and abuts against the slide groove side wall 661, and the first ratchet 631 is completely separated from the first ratchet tooth 621. The transmission column 71 applies a thrust F2 to the slide groove side wall 661, and the slide groove side wall 661 rotates around the axis of the driven gear 83. The winding shaft 4 is fixedly connected to the winding shaft disk 65, so the winding shaft 4 starts to rotate around the axis of the driven gear 83.

[0076] It should be noted that in order to clearly see the relative position relationship between the first pawl 631 and the first ratchet tooth 621, Figures 17 to 19 The second ratchet teeth 622 are removed to expose the first ratchet teeth 621 behind the second ratchet teeth 622. In addition, when the driven gear 83 rotates counterclockwise, the working principles of the first ratchet 631 and the second ratchet 632 remain unchanged, only the action flow is reversed.

[0077] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The top fan installation structure is characterized by: include: Fan chassis (1); A wire winding assembly comprises a cable (2), a wheel set (3), a wire winding shaft (4) and a driving device, wherein the driving device is used to drive the wire winding shaft (4) to rotate around its own axis; a hanging plate (5), one end of the cable (2) is connected to the hanging plate (5), and the other end of the cable (2) is connected to the wheel set (3); and A self-locking component (6) can stop the winding shaft (4) from rotating when the driving device fails.

2. The overhead fan installation structure according to claim 1, characterized in that: The self-locking component (6) comprises a ratchet disc (61), a ratchet tooth (62), a pawl and an elastic member (64); the ratchet tooth (62) is arranged on the inner wall of the ratchet disc (61); the ratchet disc (61) is fixedly connected to the fan housing (1); the pawl is movably connected to the winding shaft (4); and the elastic member (64) has a tendency to push the pawl to cooperate with the ratchet tooth (62).

3. The overhead fan installation structure according to claim 2, characterized in that: The ratchet teeth (62) include a first ratchet tooth (621) and a second ratchet tooth (622). The first ratchet tooth (621) and the second ratchet tooth (622) are respectively arranged on the inner wall of the ratchet disc (61) along the axial direction of the winding shaft (4). The tooth directions of the first ratchet tooth (621) and the second ratchet tooth (622) are opposite.

4. The overhead fan installation structure according to claim 3, characterized in that: The pawl comprises a first pawl (631) and a second pawl (632), wherein the first pawl (631) matches with the first ratchet tooth (621), and the second pawl (632) matches with the second ratchet tooth (622).

5. The overhead fan installation structure according to claim 4, characterized in that: The pawl also includes a pawl seat (633), and a transmission column slot (634) and an elastic member mounting portion (635) respectively provided on the pawl seat (633). Each of the pawl seats (633) is provided with one of the first pawl (631) and one of the second pawl (632). The side wall surface of the transmission column slot (634) close to the winding shaft (4) forms a traction inclined surface (636).

6. The overhead fan installation structure according to claim 5, characterized in that: The winding assembly also includes a self-locking assembly accommodating member (7), and the self-locking assembly accommodating member (7) includes a transmission column (71), and the transmission column (71) is located in the transmission column slot (634) and can move along the transmission column slot (634).

7. The overhead fan installation structure according to any one of claims 2 to 6, characterized in that: The self-locking component (6) further comprises a winding shaft disk (65), the winding shaft disk (65) being provided with a ratchet sliding groove (66), the ratchet being arranged in the ratchet sliding groove (66) and being movable along the extension direction of the ratchet sliding groove (66).

8. The overhead fan installation structure according to any one of claims 1 to 6, characterized in that: The driving device comprises a driving motor (81), a driving gear (82) and a driven gear (83); the driving gear (82) is fixedly connected to the output end of the driving motor (81); the driving gear (82) is meshed with the driven gear (83); and the driven gear (83) can drive the winding shaft (4) to rotate around its own axis.

9. The overhead fan installation structure according to any one of claims 1 to 6, characterized in that: The hanging plate (5) is provided with a hanging groove (51), the hanging groove (51) comprising a snap-in portion (511) and a limit portion (512) connected to each other, the snap-in portion (511) and the limit portion (512) forming an inverted L shape; The fan case (1) is provided with a hanging nail (11), the hanging nail (11) comprising a nail body (111) and a nail head (112) connected to each other, the diameter of the nail body (111) being smaller than the width of the hanging groove (51), and the diameter of the nail head (112) being larger than the width of the hanging groove (51).

10. A range hood, characterized in that: It comprises the overhead fan mounting structure as claimed in any one of claims 1 to 9.

Images