Connecting structure of oil smoke suction upper motor and connecting rod and range hood

Abstract

The utility model relates to a connecting structure of a motor and a connecting rod on oil smoke suction and a range hood, the connecting structure comprises: a motor, which is provided with a rotating shaft, and the axial direction of the rotating shaft is recorded as a first axial direction; the connecting rod is used for being connected with a smoke barrier on the extractor hood; the connecting rod is provided with a through hole for the motor rotating shaft to pass through, and a first magnetic part and a second magnetic part which can be attracted together are respectively arranged on the inner wall of the through hole and the corresponding side wall of the motor rotating shaft, so that the torque of the motor rotating shaft can be transmitted to the connecting rod through the second magnetic part and the first magnetic part, and the connecting rod rotates along with the motor rotating shaft; in addition, under the state that the rotating speed difference is generated between the motor rotating shaft and the connecting rod, the first magnetic piece is separated from the second magnetic piece. When the motor rotating shaft rotates, the second magnetic piece on the motor rotating shaft rotates synchronously, due to magnetic attraction, the second magnetic piece drives the first magnetic piece to rotate, and then the connecting rod is driven to rotate; when the motor is locked, the first magnetic piece and the second magnetic piece are separated, and the connecting rod can be well protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and in particular relates to a connection structure between a range hood upper motor and a connecting rod and a range hood. Background Art

[0002] In order to improve the oil fume extraction effect, existing range hoods, especially close-suction range hoods, are provided with a smoke baffle at the smoke inlet. The installation structure of the smoke baffle is disclosed in the Chinese invention patent application "Smoke baffle drive system, smoke baffle drive method, range hood, storage medium" with application number 202310804283.4 and application publication number CN116734301A. The smoke baffle drive system is connected to the smoke baffle, including a motor; a transmission mechanism connected between the motor and the smoke baffle, which can convert the rotation of the motor into a swinging motion to drive the smoke baffle; the transmission mechanism can adopt various transmission structures in the prior art, such as a rotation transmission structure composed of multiple connecting rods. The motor works to drive the transmission mechanism to move, thereby driving the smoke baffle to open and close.

[0003] The existing motor shaft and the transmission connecting rod are usually fastened with screws. When the motor is stalled, the torque is large, which will produce a large pulling force on the connecting rod, which may cause the connecting rod to tear in severe cases. In addition, the screws are subject to torque for a long time and there is a risk of loosening, which affects the service life of the range hood. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a connection structure between a motor and a connecting rod of a range hood to improve the service life in view of the current status of the prior art.

[0005] The second technical problem to be solved by the utility model is to provide a range hood with the above connection structure.

[0006] The technical solution adopted by the utility model to solve the first technical problem is: a connection structure between the motor and the connecting rod of the range hood, including:

[0007] The motor has a rotating shaft, and the axial direction of the rotating shaft is referred to as a first axial direction;

[0008] A connecting rod for connecting to a smoke baffle on a range hood;

[0009] Features:

[0010] The connecting rod is provided with a through hole through which the motor shaft passes, and the inner wall of the through hole and the side wall of the corresponding motor shaft are respectively provided with a first magnetic member and a second magnetic member that can be attracted together, so that the torque of the motor shaft can be transmitted to the connecting rod through the second magnetic member and the first magnetic member, so that the connecting rod rotates with the motor shaft;

[0011] Furthermore, when a rotation speed difference is generated between the motor shaft and the connecting rod, the first magnetic member is separated from the second magnetic member.

[0012] In this way, when the motor shaft rotates, the second magnetic part on the motor shaft rotates synchronously. Due to magnetic attraction, the second magnetic part drives the first magnetic part to rotate, and then drives the connecting rod to rotate, thereby driving the smoke shield to move; when the motor stalls, the first and second magnetic parts disengage, which will not cause excessive force on the connecting rod and can better protect the connecting rod.

[0013] At the same time, the connection structure of the utility model does not require the use of fasteners such as screws.

[0014] Preferably, the first magnetic member is a first magnet, the second magnetic member is a second magnet, the N pole of the first magnet is opposite to the S pole of the second magnet, or the S pole of the first magnet is opposite to the N pole of the second magnet.

[0015] Preferably, the first magnet and the second magnet are both bar magnets and extend along the first axial direction.

[0016] Furthermore, the inner wall of the through hole is provided with a first groove extending along the first axial direction and penetrating therethrough, so that the first magnet can be constrained therein; the side wall of the motor shaft is provided with a second groove extending along the first axial direction, so that the second magnet can be constrained therein. During installation, the connecting rod equipped with the first magnet can be sleeved on the outer periphery of the motor shaft equipped with the second magnet, which is convenient for operation.

[0017] Furthermore, the connecting rod includes a rod-shaped body and a connecting ring provided at one end of the rod-shaped body, the connecting ring extends along a first axial direction, and the extending direction intersects with the extending direction of the rod-shaped body, and the inner wall of the connecting ring defines the through hole.

[0018] Furthermore, the motor shaft and the through hole are arranged coaxially;

[0019] The inner diameter of the through hole is R1, and the outer diameter of the motor shaft is R2, and both satisfy 1mm≤R1-R2≤5mm.

[0020] Preferably, there are at least two first magnets, which are arranged at intervals along the circumferential direction, and the magnetic poles of two adjacent first magnets face in opposite directions;

[0021] The number of the second magnets is consistent with the number of the first magnets, and they are arranged corresponding to the respective first magnets.

[0022] This makes the overall structure more solid.

[0023] In the above schemes, preferably, a sleeve is also included, which is sleeved on the outer periphery of the motor shaft to constrain the connecting rod on the motor shaft. This prevents the connecting rod from moving along the axial direction of the motor shaft. When installation is required, the connecting rod equipped with the first magnet is sleeved on the outer periphery of the motor shaft equipped with the second magnet, and then the sleeve is installed, which is convenient for operation.

[0024] The technical solution adopted by the utility model to solve the second technical problem is: a range hood, characterized by having the connection structure as described above.

[0025] Preferably, the range hood comprises:

[0026] The box body has a smoke inlet on its front side wall;

[0027] A smoke baffle is arranged at the smoke inlet in a manner that it can rotate forward and backward along an axis extending left and right to open and close the smoke inlet;

[0028] The motor is arranged in the box body, and the connecting rod is connected to the smoke baffle plate to transmit the torque of the motor shaft to the smoke baffle plate to drive the smoke baffle plate to rotate.

[0029] Compared with the prior art, the advantages of the utility model are: when the motor shaft rotates, the second magnetic part on the motor shaft rotates synchronously. Due to magnetic attraction, the second magnetic part drives the first magnetic part to rotate, and then drives the connecting rod to rotate, thereby driving the smoke shield to move; when the motor stalls, the first and second magnetic parts disengage, which will not cause excessive force on the connecting rod and can better protect the connecting rod.

[0030] At the same time, the connection structure of the utility model does not require the use of fasteners such as screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the connection structure between the motor and the connecting rod in the embodiment of the utility model;

[0032] Figure 2 This is a schematic diagram of the connection structure between the motor and the connecting rod in another perspective in the embodiment of the utility model;

[0033] Figure 3 This is a three-dimensional exploded view of the connection structure in the embodiment of the utility model;

[0034] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0035] Figure 5 A cross-sectional view of the connection structure in an embodiment of the utility model;

[0036] Figure 6 for Figure 5 Enlarged view of middle part B;

[0037] Figure 7 It is a structural schematic diagram of a range hood in an embodiment of the utility model. DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0039] like Figures 1 to 7 As shown, a connection structure between a motor and a connecting rod on a range hood and a preferred embodiment of the range hood of the utility model is shown, and the connection structure includes a motor 1, a connecting rod 2, a first magnetic part 3, a second magnetic part 4 and a shaft sleeve 5.

[0040] The motor 1 has a rotating shaft 10, and the axial direction of the rotating shaft 10 is referred to as the first axial direction. The side wall of the motor rotating shaft 10 is provided with a second groove 11 extending along the first axial direction, and there are multiple second grooves (6 in this embodiment) and they are arranged at equal intervals along the circumference of the rotating shaft 10. The second magnetic member 4 is a bar-shaped second magnet extending along the first axial direction, the number of the second magnets is consistent with the number of the second grooves 11, and each second magnet is respectively embedded in its corresponding second groove 11, and the magnetic poles of two adjacent second magnets face opposite directions.

[0041] The connecting rod 2 is used to connect with the smoke baffle 7 on the range hood. The connecting rod 2 includes a rod-shaped body 2a and a connecting ring 2b provided at one end of the rod-shaped body 2a. The connecting ring 2b extends along the first axial direction, and the extension direction intersects with the extension direction of the rod-shaped body 2a. The inner wall of the connecting ring 2b defines a through hole 20 for the motor shaft 10 to pass through, and the motor shaft 10 and the through hole 20 are arranged coaxially; the inner diameter of the through hole 20 is R1, and the outer diameter of the motor shaft 10 is R2, and both satisfy 1mm≤R1-R2≤5mm (R1-R2 can be any value between 1 and 5mm, such as 1mm, 2mm, 3mm, 5mm, etc.). At the same time, the inner wall of the through hole 20 corresponding to the position of each second magnet is provided with a first groove 21 extending and penetrating along the first axial direction, the number of the first grooves 21 is consistent with the number of the second magnets, and each first groove 21 is arranged at equal intervals along the circumference of the inner wall of the through hole 20. The first magnetic member 3 is a first magnet in a strip shape extending along the first axial direction. The number of the first magnets is consistent with the number of the first grooves 21, and each first magnet is respectively embedded in the first grooves 21 corresponding to each other. The magnetic poles of two adjacent first magnets face opposite directions. At the same time, each first magnet is attracted to the corresponding second magnet (i.e., the N and S poles of the corresponding first and second magnets face each other), so that the torque of the motor shaft 10 can be transmitted to the connecting rod 2 through the second magnetic member 4 and the first magnetic member 3, so that the connecting rod 2 rotates with the motor shaft 10. And when a rotation speed difference is generated between the motor shaft 10 and the connecting rod 2, the first magnetic member 3 is separated from the second magnetic member 4.

[0042] The shaft sleeve 5 is sleeved on the outer circumference of the motor shaft 10 to constrain the connecting rod 2 on the motor shaft 10 to prevent the connecting rod 2 from axially moving relative to the motor shaft 10 .

[0043] like Figure 7 As shown, the range hood of this embodiment has a housing 6, a smoke baffle 7 and the above-mentioned connection structure. The front side wall of the housing 6 is provided with a smoke inlet 61, and the smoke baffle 7 is arranged at the smoke inlet 61 in a manner that it can rotate forward and backward along an axis extending left and right to open and close the smoke inlet 61. The motor 1 is arranged in the housing 6, and the connecting rod 2 is connected to the smoke baffle 7 to transmit the torque of the motor shaft 10 to the smoke baffle 7 to drive the smoke baffle 7 to rotate. In this embodiment, the connection method of the connecting rod 2 and the smoke baffle 7 refers to the prior art and is not described here.

[0044] When the motor shaft 10 rotates, the second magnetic component 4 on the motor shaft 10 rotates synchronously. Due to magnetic attraction, the second magnetic component 4 drives the first magnetic component 3 to rotate, and then drives the connecting rod 2 to rotate, thereby driving the smoke baffle 7 to rotate; when the motor is stalled, the first and second magnetic components are disengaged, which will not cause excessive force on the connecting rod 2, can better protect the connecting rod 2 and increase its service life.

[0045] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0046] The term "vertical" is also used in the specification and claims of the present utility model, which means basically along the up and down direction, and is not limited to the vertical direction only, and can also be slightly inclined relative to the vertical direction.

[0047] The term "radial" is also used in the specification and claims of the present utility model, which means basically along the inward and outward direction, and is not limited to the radial direction passing through the center of the circle, and can also be slightly deviated from the radial direction.

Claims

1. A connection structure between a range hood upper motor and a connecting rod, comprising: The motor (1) has a rotating shaft (10), and the axial direction of the rotating shaft (10) is referred to as a first axial direction; A connecting rod (2) for connecting to a smoke baffle (7) on a range hood; Its characteristics are: The connecting rod (2) is provided with a through hole (20) through which the motor shaft (10) passes, and the inner wall of the through hole (20) and the side wall of the corresponding motor shaft (10) are respectively provided with a first magnetic member (3) and a second magnetic member (4) that can be attracted together, so that the torque of the motor shaft (10) can be transmitted to the connecting rod (2) through the second magnetic member (4) and the first magnetic member (3), thereby causing the connecting rod (2) to rotate with the motor shaft (10); Furthermore, when a rotation speed difference is generated between the motor shaft (10) and the connecting rod (2), the first magnetic member (3) is separated from the second magnetic member (4).

2. The connection structure according to claim 1, wherein: The first magnetic member (3) is a first magnet, the second magnetic member (4) is a second magnet, the N pole of the first magnet is opposite to the S pole of the second magnet, or the S pole of the first magnet is opposite to the N pole of the second magnet.

3. The connection structure according to claim 2, wherein: The first magnet and the second magnet are both bar magnets and extend along the first axial direction.

4. The connection structure according to claim 3, characterized in that: The inner wall of the through hole (20) is provided with a first groove (21) extending along a first axial direction and penetrating therethrough, so as to allow the first magnet to be constrained therein; A second groove (11) extending along a first axial direction is provided on the side wall of the motor shaft (10) for the second magnet to be constrained therein.

5. The connection structure according to claim 4, characterized in that: The connecting rod (2) includes a rod-shaped body (2a) and a connecting ring (2b) provided at one end of the rod-shaped body (2a); the connecting ring (2b) extends along a first axial direction, and the extending direction intersects with the extending direction of the rod-shaped body (2a); the inner wall of the connecting ring (2b) defines the through hole (20).

6. The connection structure according to claim 4, characterized in that: The motor shaft (10) and the through hole (20) are coaxially arranged; The inner diameter of the through hole (20) is R1, and the outer diameter of the motor shaft (10) is R2, and both satisfy 1mm≤R1-R2≤5mm.

7. The connection structure according to claim 3, characterized in that: There are at least two first magnets, which are arranged at intervals along the circumferential direction, and the magnetic poles of two adjacent first magnets are in opposite directions; The number of the second magnets is consistent with the number of the first magnets, and they are arranged corresponding to their respective first magnets.

8. The connection structure according to any one of claims 1 to 7, characterized in that: It also includes a shaft sleeve (5) which is sleeved on the outer periphery of the motor shaft (10) to constrain the connecting rod (2) on the motor shaft (10).

9. A range hood, characterized in that The invention has a connection structure as claimed in any one of claims 1 to 8.

10. The range hood according to claim 9, characterized in that: The range hood comprises: The box body (6) has a smoke inlet (61) provided on its front side wall; A smoke baffle (7) is provided at the smoke inlet (61) in a manner capable of rotating forward and backward along an axis extending left and right to open and close the smoke inlet (61); The motor (1) is arranged in a box (6), and the connecting rod (2) is connected to the smoke shield (7) to transmit the torque of the motor shaft (10) to the smoke shield (7) to drive the smoke shield (7) to rotate.

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