CN211377772U

CN211377772U - Support structure of motor shaft on range hood fan and range hood

Info

Publication number: CN211377772U
Application number: CN201921709311.XU
Authority: CN
Inventors: 陈源
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-08-28
Anticipated expiration: 2029-10-12

Abstract

The utility model relates to a bearing structure of motor shaft on range hood fan, its characterized in that is provided with bearing (2) including the static support frame (1) of relative range hood's main part in this support frame (1), this bearing (2) bearing the end of motor shaft (32) in fan (3). The utility model also discloses a range hood that has above-mentioned bearing structure. Compared with the prior art, this application can carry out the enhancement of structure on current fan, and then improves impeller rotational stability.

Description

Support structure of motor shaft on range hood fan and range hood

Technical Field

The utility model belongs to the technical field of range hood, concretely relates to bearing structure of motor shaft on range hood fan and range hood thereof.

Background

The fan of the range hood mostly comprises a shell, an impeller arranged in the shell and a motor driving the impeller to rotate. The rotating shaft of the motor is generally fixed with one end face of the impeller, the other end face of the impeller is a free end capable of rotating, the single-side fixing structure enables the impeller to have a problem of dynamic balance of the impeller when the impeller is used for a long time, and under the condition that the dynamic balance of the impeller is problematic or the dynamic balance is damaged due to long-term oil accumulation, the radial force of the rotating shaft of the motor is increased due to high-speed rotation of the impeller, so that the problems of bending of the rotating shaft of the motor, eccentricity of the impeller, rapid reduction of air volume, abnormal sound and the like. However, since the impeller rotates in a working state, it is difficult to limit the impeller itself to improve the structural stability of the impeller.

In order to solve the above problem, the utility model patent of patent number ZL201420869012.3 utility model fan that a range hood was used (the grant bulletin number is CN204371724U) discloses includes spiral case, wind wheel and drive wind wheel pivoted external rotor electric machine, external rotor electric machine includes the pivot and the stator that links firmly with the pivot, pivot both ends and spiral case lateral wall fixed connection, stator outside cover is equipped with can revolute a pivoted rotor, the pivot both ends are equipped with the bearing respectively, two bearing outside overlap respectively and are equipped with the end cover, two end covers respectively with rotor fixed connection. Therefore, the wind wheel is more compactly connected with the outer rotor motor, and the rotating stability of the wind wheel is improved. However, the outer rotor motor changes the original motor structure, and the rotation stability of the impeller cannot be improved on the basis of the existing fan.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first technical problem that will solve is to prior art's current situation, provides the bearing structure of motor shaft on the structural range hood fan that carries on the improvement of fan that can carry out at present to improve the structural stability of impeller on the fan through motor shaft and this bearing structure.

The utility model aims to solve the second technical problem that a range hood with above-mentioned bearing structure is provided.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: a supporting structure of a motor shaft on a fan of a range hood is characterized by comprising a supporting frame which is static relative to a main body of the range hood, wherein a bearing is arranged in the supporting frame and supports the tail end of the motor shaft in the fan.

The bearing is preferably a rolling bearing.

In the application, in order to ensure the connection strength and not influence the normal rotation of the motor shaft, preferably, the bearing comprises an inner ring coaxially connected with the output end of the motor shaft, an outer ring and balls, wherein the outer ring and the balls are circumferentially arranged outside the inner ring; the balls are circumferentially placed in the receiving cavity. And the inner ring can rotate relative to the outer ring through the balls.

In order to avoid the situation that the ball is stuck in the accommodating cavity, preferably, one of the first groove and the second groove is arranged corresponding to the outer wall of the ball, and the ball can only rotate in the inner circumferential direction of the groove; the caliber of the other groove is larger than the diameter of the ball, and the ball can rotate in the groove in the circumferential direction and can move in the axial direction.

The inner ring can be directly and fixedly connected to the output end of the motor shaft and also can be detachably connected with the output end of the motor shaft. For convenience of assembly, preferably, the center of the inner ring is provided with a threaded hole in threaded connection with the output end of the motor shaft.

In order to facilitate the connection of the inner ring to the output end of the motor shaft, the inner ring is provided with a tool hole or a tool groove for a tool to act thereon to drive the inner ring to rotate. The tool may be a screwdriver, a bayonet, or the like.

Furthermore, the damping device also comprises a damping ring sleeved on the outer ring, and the outer ring is connected with the supporting frame through the damping ring. So, can avoid directly transmitting the vibrations on the motor shaft output to the support frame.

As an improvement, the support frame comprises at least three support rods and a fixing ring, one end of each support rod is connected to the peripheral surface of the fixing ring along the circumferential direction, and the other end of each support rod is connected to the shell of the fan; the fixed ring is circumferentially sleeved on the damping ring and is connected with the damping ring.

In order to lock the damping ring on the support frame, the further improvement is that at least two elastic sheets for compressing the damping ring are arranged on the circumferential direction of the fixing ring at intervals, each elastic sheet is provided with a bulge which is inwards convex along the radial direction of the fixing ring, and the bulges are abutted against the end surface of the damping ring.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: a range hood comprises the support structure of the motor shaft on the fan of the range hood, and is characterized in that the support frame is fixed on a wind-guiding ring, a fan cover or a smoke collection cover of the range hood. As long as the support frame can be static relative to the main body of the range hood.

Compared with the prior art, the utility model has the advantages of: through setting up bearing and support frame, pass through the bearing with the output of motor shaft and the support frame is spacing on range hood, so, can be when radially fixing the motor shaft, can also be at the impeller on the axial fixed fan, overcome among the prior art impeller unilateral support and cause the dynamic balance problem, and then improved impeller rotational stability. And this application sets up bearing and support frame through the output at the motor shaft, need not to change the structure of current motor shaft, and then is convenient for implement. The range hood with the support structure has stable structure.

Drawings

Fig. 1 is a schematic structural view of a fan in an embodiment of the present invention;

fig. 2 is a sectional view of a blower according to an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a partial exploded perspective view of the blower according to the embodiment of the present invention;

fig. 5 is an exploded perspective view of a support structure according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of the range hood according to the embodiment of the present invention (the casing in the front of the fan cover is omitted).

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1-6, for the utility model discloses a support structure for motor shaft on the fan of range hood, this support structure includes the static support frame 1 of main part relative range hood 5, is provided with bearing 2 in this support frame 1, and this bearing 2 supports the end of motor shaft 32 in the fan 3. In this embodiment, the support frame 1 is connected to the wind-guiding ring 31 of the fan 3 in a relatively stationary manner.

Specifically, as shown in fig. 3 to 5, the bearing 2 is a thrust ball bearing, and includes an inner ring 21 coaxially connected to the output end of the motor shaft 32, an outer ring 22 circumferentially disposed outside the inner ring 21, a plurality of balls 23, a ball retaining ring 25, and a damping ring 24, the outer ring 22 is connected to the support frame 1 through the damping ring 24, a first groove 210 and a second groove 220 are respectively disposed on opposite circumferential surfaces of the inner ring 21 and the outer ring 22, and the first groove and the second groove enclose to form an accommodating cavity for placing the balls 23; balls 23 are circumferentially placed in the receiving cavity, and the inner race 21 is rotatable relative to the outer race 22 via the balls 23.

In order to prevent the balls 23 from being locked and enable the parts to have certain dimensional errors, in the embodiment, the second groove 220 is arranged corresponding to the outer wall of the balls 23, and the balls 23 can only rotate in the inner circumferential direction of the second groove 220; the diameter of the first groove 210 is larger than the diameter of the ball 23, and the ball 23 can rotate in the inner circumferential direction of the first groove 210 and also can have a floating space of about 2mm in the axial direction. In order to arrange the balls 23 in order along the circumferential direction of the accommodating chamber, the ball retaining ring 25 is disposed in the accommodating chamber, and the ball retaining ring 25 is provided with the stopper holes 250 at intervals along the circumferential direction, and the balls 23 are disposed in the corresponding stopper holes 250.

To facilitate the attachment of the inner ring 21 to the output end of the motor shaft 32, the inner ring 21 is provided at its center with a threaded hole 211 to be threadedly coupled to the output end of the motor shaft 32. The inner ring 21 is provided with two tool holes 212 for the bolt to act thereon to drive the inner ring 21 to rotate, and the tool holes 212 are symmetrically distributed on both sides of the threaded hole 211 with the threaded hole 211 as the center.

The support frame 1 comprises three support rods 11 and a fixing ring 12, one end of each support rod 11 is circumferentially connected to the outer circumferential surface of the fixing ring 12, and the other end of each support rod 11 is circumferentially connected to an air inducing ring 31 of the fan; the fixed ring 12 is circumferentially sleeved on the damping ring 24, three elastic sheets 13 used for compressing the damping ring 24 are circumferentially arranged on the fixed ring 12 at intervals, each elastic sheet 13 is provided with a protrusion 131 which is inward convex along the radial direction of the fixed ring 12, and the protrusion 131 abuts against the end face of the damping ring 24, so that the damping ring 24 is locked.

When the fan is used, the inner ring 21 of the bearing 2 is connected to the output end of the motor shaft 32, the other end of each support rod 11 is connected to the air guide ring 31, the output end of the motor shaft 32 can be radially fixed on the fan 3, and then the impeller 33 connected with the motor shaft 32 is further supported, and the structural stability of the impeller 33 is improved.

In this embodiment, as shown in fig. 6, the range hood 5 having the above-mentioned support structure includes a fan cover 51 and a smoke collecting cover 52, the fan 3 is disposed in the fan cover 51, and the support frame 1 is fixed on the induced air ring 31 of the fan 3.

Claims

1. The utility model provides a bearing structure of motor shaft on range hood fan which characterized in that: the range hood comprises a support frame (1) which is static relative to a main body of the range hood, wherein a bearing (2) is arranged in the support frame (1), and the bearing (2) supports the tail end of a motor shaft (32) in the fan (3).

2. The support structure of claim 1, wherein: the bearing (2) is a rolling bearing.

3. The support structure of claim 2, wherein: the bearing (2) comprises an inner ring (21) coaxially connected with the output end of the motor shaft (32), an outer ring (22) and balls (23) which are circumferentially arranged outside the inner ring (21), the outer ring (22) is connected with the support frame (1), a first groove (210) and a second groove (220) are respectively arranged on the circumferential surfaces of the inner ring (21) and the outer ring (22) which are opposite, and the first groove and the second groove are enclosed to form an accommodating cavity for placing the balls (23); the balls (23) are placed in the accommodating cavity along the circumferential direction, and the inner ring (21) can rotate relative to the outer ring (22) through the balls (23).

4. The support structure of claim 3, wherein: one of the first and second grooves is arranged corresponding to the outer wall of the ball (23), and the ball (23) can only rotate in the inner circumferential direction of the groove; the caliber of the other groove is larger than the diameter of the ball (23), and the ball (23) can rotate in the groove in the circumferential direction and can move in the axial direction.

5. The support structure of claim 3, wherein: the center of the inner ring (21) is provided with a threaded hole (211) which is in threaded connection with the output end of the motor shaft (32).

6. The support structure of claim 5, wherein: the inner ring (21) is provided with a tool hole (212) or a tool groove for a tool to act on to drive the inner ring (21) to rotate.

7. The support structure of claim 3, wherein: the shock-absorbing support frame is characterized by further comprising a shock-absorbing ring (24) sleeved on the outer ring (22), and the outer ring (22) is connected with the support frame (1) through the shock-absorbing ring (24).

8. The support structure of claim 7, wherein: the support frame (1) comprises at least three support rods (11) and a fixing ring (12), one end of each support rod (11) is connected to the outer peripheral surface of the fixing ring (12) along the circumferential direction, and the other end of each support rod is connected to the shell of the fan; the fixing ring (12) is circumferentially sleeved on the damping ring (24) and is connected with the damping ring (24).

9. The support structure of claim 8, wherein: the damping ring is characterized in that at least two elastic pieces (13) used for compressing the damping ring (24) are arranged on the fixing ring (12) in the circumferential direction at intervals, each elastic piece (13) is provided with a protrusion (131) protruding inwards along the radial direction of the fixing ring (12), and the protrusions (131) abut against the end face of the damping ring (24).

10. A range hood comprising the support structure for the motor shaft of the range hood as claimed in any one of claims 1 to 9, wherein: the support frame (1) is fixed on an induced draft ring (31) or a fan cover (51) or a smoke collecting cover (52) of the range hood (5).