Fan and range hood

Abstract

The utility model provides a fan and a range hood. The fan comprises a motor and an impeller, the motor is provided with an output shaft, the impeller is provided with a penetrating hole, the output shaft is sleeved with the impeller through the penetrating hole, the fan further comprises a clamping jaw and a positioning base which can move between a first position and a second position relative to the clamping jaw in the first direction, and the clamping jaw is provided with a plurality of elastic arms inserted into the positioning base. A matching structure is arranged between the elastic arms and the positioning seat, and the matching structure is configured to enable the elastic arms to be in a first state when the positioning seat is in a first position relative to the clamping jaw, enable the elastic arms in the first state to be separated from the output shaft and enable the elastic arms to be in a second state when the positioning seat is in a second position relative to the clamping jaw. And the plurality of elastic arms in the second state limit the output shaft. According to the fan, fastening connection between the motor and the impeller is formed through interaction of force, the connection is not prone to loosening, and the situation similar to nut thread loosening does not occur. And the structure is simpler and easy to realize.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a fan and a range hood. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in people's daily lives. Range hoods can quickly remove the fumes generated during the user's cooking process, which can reduce pollution, purify the air, and greatly improve people's quality of life. Range hoods are usually equipped with a fan, which usually includes an impeller and a motor. The impeller can rotate under the drive of the output shaft of the motor, and the flowing airflow formed can remove the fumes generated during the user's cooking process.

[0003] In existing range hoods, threads are usually provided on the output shaft of the motor, and the relative position of the impeller and the motor is fixed by the cooperation between the nut and the thread. However, such fixing with the nut may cause the nut to slip or the nut to be not tightened, resulting in the loosening of the impeller, which in turn causes problems such as loud noise and damage to the entire equipment. Utility Model Content

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the utility model, a fan is provided. The fan includes a motor and an impeller, the motor has an output shaft, the impeller has a through hole, the impeller is sleeved on the output shaft through the through hole, the fan also includes a claw and a positioning seat movable between a first position and a second position relative to the claw along a first direction, the claw has a plurality of elastic arms inserted in the positioning seat, wherein the elastic arms and the positioning seat have a matching structure with each other, and the matching structure is configured to make the plurality of elastic arms in a first state when the positioning seat is in a first position relative to the claw, and the plurality of elastic arms in the first state are separated from the output shaft, and the plurality of elastic arms in a second state when the positioning seat is in a second position relative to the claw, and the plurality of elastic arms in the second state form a limit to the output shaft.

[0005] The fan provided by the utility model, under the action of the matching structure, when the positioning seat is in the second position relative to the claw, the multiple elastic arms can be in the second state relative to each other, so that the output shaft can be limited, and the fastening connection between the motor and the impeller can be achieved. In such a fan, the fastening connection between the motor and the impeller is formed by the interaction of forces, and the connection is not easy to loosen, and there will be no situation similar to the slipping of the nut. The structure is also simpler and easy to implement.

[0006] For example, the elastic arm has a suspension end, a latch portion is formed on the suspension end, the output shaft has a connection section, a latch matching portion is provided on the connection section, and the latch portion is engaged with the latch matching portion when the plurality of elastic arms are in the second state. In such a fan, even after a long time, the connection between the impeller and the motor is not easy to loosen, and there will be no situation similar to nut slipping, and the overall device is more stable and safer when in use.

[0007] Exemplarily, the positioning seat has an insertion hole, and the matching structure includes a guide portion and an abutment portion, wherein the guide portion is formed on the hole wall of the insertion hole and is inclined relative to the center line of the insertion hole, and the abutment portion is formed on the elastic arm for abutting against the guide portion. In such a fan, the process of switching between the first state and the second state of the multiple elastic arms is more continuous, and the installation of the fan is more convenient and labor-saving.

[0008] For example, the latch portion and the abutment portion are connected to form a hook shape, and the latch portion is closer to the center line of the insertion hole than the abutment portion. Such an elastic arm can grasp, hold or clamp the output shaft more stably, and the latch portion and the abutment portion can be formed by integrated processing. When the latch portion and the abutment portion are connected to form a hook shape, the whole is easier to produce and process, and the latch portion and the abutment portion can be formed by bending the plate.

[0009] Exemplarily, the positioning seat has a first end and a second end, the first end and the second end are arranged oppositely, the insertion hole passes through from the first end to the second end along the first direction, and the insertion hole has a first hole section, a second hole section and a third hole section in sequence from the first end to the second end, the aperture of the first hole section is larger than the aperture of the third hole section, and the guide portion is formed on the hole wall of the second hole section. The insertion hole that passes through the positioning seat is easier to process, and it is also more convenient to insert the claw into such an insertion hole, so that such a fan is easier to realize. The third hole section can prevent the claw from falling off from the positioning seat at the second end. The third hole section can also have an inner diameter close to the size of the output shaft, for example, the third hole section can have an inner diameter close to the outer diameter of the output shaft, so that the third hole section can limit the radial displacement and swing of the output shaft, the claw can be inserted into the first hole section from the first end, and a plurality of elastic arms can be switched to the second state at the second hole section, thereby realizing the limit of the output shaft, so that the fan is more convenient to install.

[0010] Exemplarily, a cover plate is connected to the positioning seat, and the cover plate has a covering portion covering the end surface where the first end is located. The covering portion can protect the end surface where the first end is located to prevent the positioning seat from being damaged.

[0011] Exemplarily, the claw has a connecting body, a plurality of elastic arms are arranged on the connecting body, and in the first direction, the connecting body and the end face where the first end is located are respectively located on both sides of the covering portion. The plurality of elastic arms are arranged on the connecting body, and the overall structure of the claw is more stable. The connecting body and the end face where the first end is located are respectively located on both sides of the covering portion, and when the plurality of elastic arms are in the second state, the connecting body can clamp the covering portion with the end face where the first end is located, and at this time, the claw, the positioning seat and the cover plate are relatively stable as a whole, so that the claw is more stable when limiting the output shaft.

[0012] Exemplarily, the cover plate has a limiting portion extending into the first hole segment, and the limiting portion keeps the multiple elastic arms in the first state in the insertion hole. The setting of the upper limiting portion of the cover plate can prevent the multiple elastic arms from falling off after being inserted into the insertion hole, thereby improving the overall stability of the fan.

[0013] For example, a threaded connection portion is provided on the outer periphery of the cover plate, an internal thread is provided on the threaded connection portion, an external thread is provided on the outer side wall of the positioning seat, and the cover plate and the positioning seat are connected by the internal thread and the external thread. The cover plate is connected to the positioning seat by thread, and the fan is more stable as a whole, and such a fan is simpler and easier to install.

[0014] Exemplarily, the latch fitting portion includes an annular groove, and the latch fitting portion is engaged with the annular groove when the plurality of elastic arms are in the second state. The latch fitting portion in the form of an annular groove is easier to produce and process, and it is also easier to engage the annular groove when the plurality of elastic arms are in the second state relative to each other, and strict alignment in the circumferential direction of the annular groove is not required.

[0015] Exemplarily, the impeller includes a first wheel body, a second wheel body and a separator, the separator has a first side and a second side, the first side is arranged opposite to the second side, the first wheel body is connected to the first side, the second wheel body is connected to the second side, a through hole is arranged on the separator and passes through from the first side to the second side, a support portion is formed on the separator at the periphery of the through hole, and the fan also includes an elastic member, one end of the elastic member is connected to the positioning seat, and the other end abuts against the support portion. In this way, when the positioning seat is in the second position relative to the claw, the elastic force of the elastic member acting on the positioning seat can be transmitted to make the clamping part and the clamping matching part more stable, and when disassembly is required, the disassembly can be made more labor-saving and convenient under the action of the elastic member.

[0016] Exemplarily, an installation groove is provided on the outer side wall of the positioning seat, and one end of the elastic member is connected to the installation groove. The elastic member is connected to the positioning seat in this way, and the overall structure is simpler and easier to implement.

[0017] According to another aspect of the utility model, a range hood is provided. The range hood includes a chassis and any one of the fans described above, and the fan is arranged in the chassis. Since the connection between the impeller in the fan and the output shaft is not easy to loosen, the situation similar to the nut slipping will not occur, and the range hood is more stable and safer when in use.

[0018] A series of simplified concepts are introduced in the utility model content, which will be further described in detail in the detailed implementation section. The utility model content section does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0019] The advantages and features of the present invention are described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the implementation of the present invention and its description, and are used to explain the principle of the present invention. In the drawings,

[0021] Figure 1 is a perspective view of a fan according to an exemplary embodiment of the present utility model;

[0022] Figure 2 for Figure 1 An exploded view of the fan is shown;

[0023] Figure 3 It is a cross-sectional view of a fan according to an exemplary embodiment of the utility model, wherein the positioning seat is in a second position relative to the claw and the latch portion is engaged with the latch matching portion;

[0024] Figure 4 for Figure 3 A partial enlarged view of the fan shown;

[0025] Figure 5 It is a cross-sectional view of a fan according to an exemplary embodiment of the utility model, wherein the positioning seat is in a first position relative to the claw;

[0026] Figure 6 A partial perspective view of a fan according to an exemplary embodiment of the present utility model;

[0027] Fig. 7A A partial perspective view of a fan according to an exemplary embodiment of the present utility model;

[0028] Figure 7B for Fig. 7A A partial front view of the fan is shown;

[0029] Figure 8for Fig. 7A A partial exploded view of the fan is shown;

[0030] Fig. 9A It is a partial cross-sectional view of a fan according to an exemplary embodiment of the utility model, wherein the positioning seat is in a second position relative to the claw;

[0031] Fig. 9B A partial cross-sectional view of a fan according to an exemplary embodiment of the utility model, wherein the positioning seat is in a first position relative to the claw; and

[0032] Fig.10 It is a perspective view of a claw according to an exemplary embodiment of the present utility model.

[0033] The above drawings include the following reference numerals:

[0034] 10. fan; 110. claw; 111. elastic arm; 1111. suspension end; 1111a. latching portion; 1111b. abutting portion; 112. connector; 120. positioning seat; 121. first end; 122. second end; 123. insertion hole; 1231. first hole section; 1232. second hole section; 1232a. guide portion; 1233. third hole section; 124. mounting groove; 130. cover plate; 131. shield Cover; 132, limiting portion; 133, threaded connection portion; 200, motor; 210, output shaft; 211, connecting section; 211a, latch fitting portion; 220, main body; 300, impeller; 310, first wheel body; 320, second wheel body; 330, separator; 331, first side; 332, second side; 333, through hole; 334, supporting portion; 335, bushing; 400, elastic member; 500, volute. DETAILED DESCRIPTION

[0035] In the following description, a large number of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only illustrates preferred embodiments of the present invention, and the present invention can be implemented without one or more of such details. In addition, in order to avoid confusion with the present invention, some technical features known in the art are not described in detail.

[0036] According to one aspect of the utility model, a fan is provided. The fan can be applied to any suitable device, including but not limited to a range hood. Therefore, according to another aspect of the utility model, a range hood is provided, and the range hood can include any fan to be introduced below. The fan and the range hood provided by the utility model will be described in detail below with reference to the accompanying drawings.

[0037] See also Figure 1 and Figure 2 The range hood may include a chassis and any fan 10 as will be described below, and the fan 10 may be arranged in the chassis. The fan 10 may include a motor 200, an impeller 300 and a volute 500. The motor 200 and the impeller 300 may be arranged in the volute 500.

[0038] The motor 200 may include a main body 220 and an output shaft 210, and the main body 220 may drive the output shaft 210 to rotate. The main body 220 may be fixedly connected to the volute 500 by threaded connection or other various forms.

[0039] The impeller 300 may include a first wheel body 310, a second wheel body 320 and a separator 330. The separator 330 may have a first side 331 and a second side 332. The first side 331 and the second side 332 may be arranged opposite to each other. The first wheel body 310 may be connected to the first side 331, and the second wheel body 320 may be connected to the second side 332. The impeller 300 may have a through hole 333. The through hole 333 may be arranged at any suitable position on the impeller 300. Usually, the through hole 333 may be arranged on the separator 330 of the impeller 300. The impeller 300 may be sleeved on the output shaft 210 through the through hole 333. The output shaft 210 may have a connecting section 211. The connecting section 211 may be a portion of the output shaft 210 that passes through the through hole 333 and is away from the main body 220.

[0040] See also Fig. 7A , Figure 7B and Figure 8 The fan 10 may further include a claw 110 and a positioning seat 120. Fig. 9A , Fig. 9B and Fig.10 The claw 110 may have a plurality of elastic arms 111 inserted into the positioning seat 120, and the plurality of elastic arms 111 may have a first state and a second state. The plurality of elastic arms 111 in the first state may be separated from the output shaft 210, and the plurality of elastic arms 111 do not limit the output shaft 210; the plurality of elastic arms 111 in the second state may limit the output shaft 210, so that the output shaft 210 cannot move or rotate. The elastic arm 111 may be in the form of a cantilever, such as Fig.10 In the illustrated embodiment, one end of the plurality of elastic arms 111 is connected to the connecting body 112, and the other end forms a suspended end 1111. The plurality of elastic arms 111 may have a certain elasticity, and in a natural state, the plurality of elastic arms 111 may be in a first state, and the inner side wall of the positioning seat 120 may abut against the plurality of elastic arms 111, so that the plurality of elastic arms 111 may switch between the first state and the second state according to the position change of the plurality of elastic arms 111 inserted in the positioning seat 120. Specifically, Fig. 9AIn the illustrated embodiment, the plurality of elastic arms 111 are in the second state, and the plurality of elastic arms 111 are now against a portion with a smaller inner diameter in the positioning seat 120; Fig. 9B In the illustrated embodiment, the plurality of elastic arms 111 are in a first state, at which time the plurality of elastic arms 111 may abut against a portion with a larger inner diameter in the positioning seat 120, or may just contact the inner side wall of the positioning seat 120 without being constrained, or may not contact the inner side wall of the positioning seat 120.

[0041] The positioning seat 120 is movable between a first position and a second position along a first direction (XX direction in the figure) relative to the claw 110. The elastic arms 111 and the positioning seat 120 may have a matching structure with each other. The matching structure may be configured to place the plurality of elastic arms 111 in a first state when the positioning seat 120 is in a first position relative to the claw 110, and to place the plurality of elastic arms 111 in a second state when the positioning seat 120 is in a second position relative to the claw 110. The matching structure means that the elastic arm 111 may have a contact portion 1111b, and the positioning seat 120 may have a guide portion 1232a. When the positioning seat 120 is in the first position relative to the claw 110, the contact portion 1111b may contact the guide portion 1232a, or just contact the guide portion 1232a without being constrained by the guide portion 1232a, or may not contact the guide portion 1232a. When the positioning seat 120 is in the second position relative to the claw 110, the contact portion 1111b contacts the guide portion 1232a, and the contact portions 1111b of the plurality of elastic arms 111 will approach each other under the contact of the guide portion 1232a, that is, the positioning seat 120 will switch the plurality of elastic arms 111 to the second state. Fig. 9B At this time, the positioning seat 120 is in the first position relative to the claw 110; see Fig. 9A , at this time, the positioning seat 120 is in the second position relative to the claw 110. The multiple elastic arms 111 in the second state can limit the output shaft 210. For example, the multiple elastic arms 111 in the second state can form any suitable connection with the output shaft 210 such as gripping, abutting or clamping, thereby limiting the output shaft 210 in all directions. When the multiple elastic arms 111 limit the output shaft 210, the output shaft 210 cannot move or rotate.

[0042] When the fan 10 is installed, the claw 110 can be sleeved on the output shaft 210, and the positioning seat 120 can be against the impeller 300 or connected to the impeller 300. Here, the connection between the positioning seat 120 and the impeller 300 can be a fixed connection or an elastic connection. Figure 3 , Figure 4 and Figure 5In the illustrated embodiment, the positioning seat 120 is connected to an elastic member 400, and the positioning seat 120 is pressed against the partition 330 through the elastic member 400. The elastic member 400 can exert an elastic force on the positioning seat 120 away from the partition 330. Figure 5 When the positioning seat 120 is in the first position relative to the claw 110, the plurality of elastic arms 111 are in the first state. At this time, the claw 110 is only sleeved on the output shaft 210 without limiting the output shaft 210. Figure 3 and Figure 4 , the positioning seat 120 is in the second position relative to the claw 110, and under the action of the matching structure, the multiple elastic arms 111 are in the second state, at this time, the multiple elastic arms 111 limit the output shaft 210, and the specific limiting form can be a clamping connection with the output shaft 210 as shown in the figure, or it can be other various forms such as grasping and leaning that are not shown. Because the elastic member 400 applies an elastic force to the positioning seat 120 away from the separator 330, under the action of the matching structure, the positioning seat 120 can actually clamp the multiple elastic arms 111 of the claw 110, thereby clamping the output shaft 210 to achieve a fastened connection. Of course, the positioning seat 120 abutting against the separator 330 through the elastic member 400 is only used as an example here. In other embodiments not shown, the positioning seat 120 can also be fixedly connected to the separator 330 in various forms. For example, the positioning seat 120 can be fixedly connected to the separator 330 in various forms such as snap-on, welding, etc., and a fastening connection between the separator 330 and the output shaft 210 can also be achieved. However, the fastening connection formed by the positioning seat 120 fixedly connected to the separator 330 is more stable than that of the positioning seat 120 abutting against the separator 330 through the elastic member 400, but it is more difficult to disassemble.

[0043] The fan 10 provided by the utility model, under the action of the matching structure, when the positioning seat 120 is in the second position relative to the claw 110, the multiple elastic arms 111 can be in the second state, so that the output shaft 210 can be limited, and the fastening connection between the motor 200 and the impeller 300 can be achieved. Such a fan 10 forms a fastening connection between the motor 200 and the impeller 300 through the interaction of forces, and the connection is not easy to loosen, and there will be no situation similar to the nut slipping. The structure is also simpler and easy to implement.

[0044] In one embodiment of the present invention, see Figure 2 , Figure 3 , Figure 4 and Figure 5The elastic arm 111 may have a suspension end 1111, and a latching portion 1111a may be formed on the suspension end 1111. A latching mating portion 211a may be provided on the connecting section 211 of the output shaft 210, and the latching portion 1111a may be engaged with the latching mating portion 211a when the plurality of elastic arms 111 are in the second state. The latching mating portion 211a and the latching portion 1111a may be in any form that is easy to engage with each other, such as Figure 3 and Figure 4 As shown, the latching fitting part 211a can be in the form of multiple grooves matching the number of the multiple latching parts 1111a on the multiple elastic arms 111, and the latching part 1111a can be hook-shaped, and the latching part 1111a can be latched when it abuts against the latching fitting part 211a. In such a fan 10, even after a long time, the connection between the impeller 300 and the motor 200 is not easy to loosen, and there will be no situation similar to the nut slipping, and the overall device is more stable and safer when in use.

[0045] In one embodiment of the present invention, see Fig. 9A and Fig. 9B The positioning seat 120 may have an insertion hole 123, and a plurality of elastic arms 111 may be inserted into the insertion hole 123. The matching structure may include a guide portion 1232a and an abutment portion 1111b. The guide portion 1232a may be formed on the hole wall of the insertion hole 123 and may be inclined relative to the center line (center line CC in the figure) of the insertion hole 123. The abutment portion 1111b is formed on the elastic arm 111 for abutting against the guide portion 1232a. The side of the abutment portion 1111b facing the guide portion 1232a may have any form of curved surface. The abutment portion 1111b can slide on the guide portion 1232a. When the guide portion 1232a is tilted, the tilting direction can be: as the positioning seat 120 moves from the first position to the second position relative to the claw 110 in the first direction XX, the multiple elastic arms 111 switch from the first state to the second state, and at the same time, the abutment portion 1111b slides on the tilted guide portion 1232a and gradually approaches the center line CC of the insertion hole 123. In this way, the process of switching the multiple elastic arms 111 from the first state to the second state in the fan 10 is more continuous, and the installation of the fan 10 is more convenient and labor-saving.

[0046] In one embodiment of the present invention, see Fig. 9A , Fig. 9B and Fig.10, the latch portion 1111a can be connected with the abutment portion 1111b to form a hook shape, and the latch portion 1111a can be closer to the center line of the insertion hole 123 than the abutment portion 1111b. The output shaft 210 can be located at the center line CC of the insertion hole 123. Such an elastic arm 111 can grasp, hold or clamp the output shaft 210 more stably, and the latch portion 1111a and the abutment portion 1111b can be formed by integrated processing. When the latch portion 1111a and the abutment portion 1111b are connected to form a hook shape, the whole is easier to produce and process, and the latch portion 1111a and the abutment portion 1111b can be formed by bending the plate.

[0047] In one embodiment of the present invention, see Fig. 9A , Fig. 9B and Fig.10 The positioning seat 120 may have a first end 121 and a second end 122, the first end 121 and the second end 122 may be arranged opposite to each other, the insertion hole 123 may pass through from the first end 121 to the second end 122 along the first direction, and the insertion hole 123 may have a first hole section 1231, a second hole section 1232 and a third hole section 1233 in sequence from the first end 121 to the second end 122, the aperture of the first hole section 1231 may be larger than the aperture of the third hole section 1233, and the guide portion 1232a may be formed on the hole wall of the second hole section 1232. The insertion hole 123 that passes through the positioning seat 120 is easier to process, and it is also more convenient for the claw 110 to be inserted into such an insertion hole 123, and such a fan 10 is also easier to realize. The third hole section 1233 can prevent the claw 110 from falling off from the positioning seat 120 at the second end 122. The third hole section 1233 may also have an inner diameter that is close to the size of the output shaft 210. For example, the third hole section 1233 may have an inner diameter that is close to the outer diameter of the output shaft 210. In this way, the third hole section 1233 may limit the radial displacement and swing of the output shaft 210. The claw 110 may be inserted into the first hole section 1231 from the first end 121. At the second hole section 1232, the plurality of elastic arms 111 may be switched to the second state, thereby achieving the limitation of the output shaft 210. Such a fan 10 is more convenient to install.

[0048] In one embodiment of the present invention, see Figure 8 , Fig. 9A and Fig. 9B The positioning seat 120 may be connected to a cover plate 130, and the cover plate 130 may have a cover portion 131 that covers the end surface where the first end 121 is located. The cover portion 131 may protect the end surface where the first end 121 is located to prevent the positioning seat 120 from being damaged.

[0049] Exemplarily, the claw 110 may have a connecting body 112, and a plurality of elastic arms 111 may be arranged on the connecting body 112, and in the first direction XX, the connecting body 112 and the end surface where the first end 121 is located may be located on both sides of the covering portion 131, respectively. The plurality of elastic arms 111 are arranged on the connecting body 112, and the overall structure of the claw 110 is more stable. The connecting body 112 and the end surface where the first end 121 is located are located on both sides of the covering portion 131, respectively. When the plurality of elastic arms 111 are in the second state, the connecting body 112 and the end surface where the first end 121 is located may clamp the covering portion 131, respectively. At this time, the claw 110, the positioning seat 120 and the cover plate 130 are relatively stable as a whole, so that the claw 110 is more stable when limiting the output shaft 210.

[0050] Exemplarily, the cover plate 130 may have a limiting portion 132 extending into the first hole section 1231, and the limiting portion 132 may keep the plurality of elastic arms 111 in the first state in the insertion hole 123. The limiting portion 132 may be in any suitable form, and the aperture of the opening formed by the limiting portion 132 will be smaller than the inner diameter of the first hole section 1231. The provision of the upper limiting portion 132 of the cover plate 130 may prevent the plurality of elastic arms 111 from falling off after being inserted into the insertion hole 123, thereby improving the overall stability of the fan 10.

[0051] For example, a threaded connection portion 133 may be provided on the outer periphery of the cover plate 130, an internal thread may be provided on the threaded connection portion 133, an external thread may be provided on the outer side wall of the positioning seat 120, and the cover plate 130 and the positioning seat 120 may be connected by the internal thread and the external thread. The cover plate 130 is connected to the positioning seat 120 by threads, and the fan 10 is more stable as a whole, and such a fan 10 is simpler and easier to implement during installation.

[0052] For example, see Figure 2 , Figure 3 , Figure 4 and Figure 5The impeller 300 may include a first wheel body 310, a second wheel body 320 and a separator 330. The separator 330 may have a first side 331 and a second side 332. The first side 331 and the second side 332 may be arranged opposite to each other. The first wheel body 310 may be connected to the first side 331, and the second wheel body 320 may be connected to the second side 332. A through hole 333 may be arranged on the separator 330 and pass through from the first side 331 to the second side 332. A support portion 334 may be formed on the separator 330 at the periphery of the through hole 333. A sleeve 335 may be arranged on the support portion 334. The sleeve 335 may be sleeved on the output shaft 210 to make the output shaft 210 more stable. The fan 10 may further include an elastic member 400. One end of the elastic member 400 may be connected to the positioning seat 120, and the other end may be against the support portion 334. The elastic member 400 may be a spring or various other forms. One end of the elastic member 400 can be connected to the positioning seat 120 by clamping, welding or other various forms. Obviously, the elastic member 400 can provide the positioning seat 120 with an elastic force to move the positioning seat 120 from the second position to the first position relative to the claw 110. In this way, when the positioning seat 120 is in the second position relative to the claw 110, the elastic force of the elastic member 400 acting on the positioning seat 120 can be transmitted to make the clamping of the latch portion 1111a and the latch matching portion 211a more stable, and when disassembly is required, the elastic member 400 can make the disassembly more labor-saving and more convenient.

[0053] For example, see Figure 3 , Figure 4 , Figure 5 and Figure 6 The outer wall of the positioning seat 120 may be provided with a mounting groove 124, and one end of the elastic member 400 may be connected to the mounting groove 124. The mounting groove 124 may have a size matching that of the elastic member 400, and the elastic member 400 may be snap-fitted to the mounting groove 124. The elastic member 400 is connected to the positioning seat 120 in this way, and the overall structure is simpler and easier to implement.

[0054] Exemplarily, the latching part 211a may include an annular groove, and the latching part 1111a may be inserted into the annular groove when the plurality of elastic arms 111 are in the second state. The latching part 211a in the form of an annular groove is easier to produce and process, and it is also easier to insert the latching part 1111a into the annular groove when the plurality of elastic arms 111 are in the second state, without the need for strict alignment in the circumferential direction of the annular groove.

[0055] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0059] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A fan, comprising a motor and an impeller, wherein the motor has an output shaft, the impeller has a through hole, and the impeller is sleeved on the output shaft through the through hole, characterized in that: The fan further comprises a claw and a positioning seat movable between a first position and a second position along a first direction relative to the claw, wherein the claw has a plurality of elastic arms inserted in the positioning seat. In which, the elastic arm and the positioning seat have a matching structure with each other, and the matching structure is configured to make the multiple elastic arms be in the first state when the positioning seat is in the first position relative to the claw, and the multiple elastic arms in the first state are disengaged from the output shaft; when the positioning seat is in the second position relative to the claw, the multiple elastic arms are in the second state, and the multiple elastic arms in the second state form a limit for the output shaft.

2. The fan according to claim 1, characterized in that: The elastic arm has a suspension end with a latching portion formed on the suspension end, the output shaft has a connecting section with a latching mating portion provided on the connecting section, and the latching portion is latched with the latching mating portion when the plurality of elastic arms are in the second state.

3. The fan according to claim 2, characterized in that: The positioning seat has an insertion hole, and the matching structure includes a guiding portion and an abutting portion. The guiding portion is formed on the hole wall of the insertion hole and is inclined relative to the center line of the insertion hole. The abutting portion is formed on the elastic arm for abutting against the guiding portion.

4. The fan according to claim 3, characterized in that: The latch portion is connected to the abutting portion to form a hook shape, and the latch portion is closer to the center line of the insertion hole than the abutting portion.

5. The fan according to claim 3, characterized in that: The positioning seat has a first end and a second end, the first end is arranged opposite to the second end, the insertion hole passes through from the first end to the second end along the first direction, and the insertion hole has a first hole segment, a second hole segment and a third hole segment in sequence from the first end to the second end, the hole diameter of the first hole segment is larger than the hole diameter of the third hole segment, and the guide portion is formed on the hole wall of the second hole segment.

6. The fan according to claim 5, characterized in that: The positioning seat is connected with a cover plate, and the cover plate has a covering portion covering the end surface where the first end is located.

7. The fan according to claim 6, characterized in that: The claw has a connecting body, and the plurality of elastic arms are arranged on the connecting body. In the first direction, the connecting body and the end surface where the first end is located are respectively located on two sides of the covering portion.

8. The fan according to claim 6, characterized in that: The cover plate has a limiting portion extending into the first hole segment, and the limiting portion keeps the plurality of elastic arms in the first state in the insertion hole.

9. The fan according to claim 6, characterized in that: A threaded connection portion is provided on the outer periphery of the cover plate, an internal thread is provided on the threaded connection portion, an external thread is provided on the outer side wall of the positioning seat, and the cover plate and the positioning seat are connected by the internal thread and the external thread.

10. The fan according to claim 2, characterized in that: The latch fitting portion comprises an annular groove, and the latch portion is latched into the annular groove when the plurality of elastic arms are in the second state.

11. The fan according to claim 1, characterized in that: The impeller includes a first wheel body, a second wheel body and a separator, the separator has a first side and a second side, the first side is arranged opposite to the second side, the first wheel body is connected to the first side, the second wheel body is connected to the second side, the through hole is arranged on the separator and passes through from the first side to the second side, a support portion is formed on the separator at the periphery of the through hole, and the fan also includes an elastic member, one end of the elastic member is connected to the positioning seat, and the other end abuts against the support portion.

12. The fan according to claim 11, characterized in that: An installation groove is arranged on the outer side wall of the positioning seat, and one end of the elastic member is connected to the installation groove.

13. A range hood, characterized in that: The invention comprises a chassis and a fan as claimed in any one of claims 1 to 12, wherein the fan is arranged in the chassis.

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