Bearing mounting structure for air conditioner fan and air conditioner

Abstract

The bearing installation structure comprises a fan driving shaft, a bearing, a shaft sleeve and an outer shell, a round hole penetrating through the left plane of the bearing and the right plane of the bearing is formed in the center of the bearing, and the first end of the fan driving shaft is arranged in the round hole in a penetrating mode through the left plane of the bearing. The fan shaft rotates in the round hole, the shaft sleeve is arranged on the peripheral side of the bearing in a sleeved mode, the shell is arranged outside the shaft sleeve in a sleeved mode and used for fixing the shaft sleeve and the bearing, an oil blocking piece is arranged on the inner wall of the shaft sleeve on one side of the right plane of the bearing, the oil blocking piece is an annular protrusion extending from the inner wall of the shaft sleeve to the central axis of the fan driving shaft, and a central hole is formed in the annular protrusion. The fan driving shaft is arranged in the center hole in a penetrating mode and is in clearance fit with the center hole. The utility model solves the technical problems that the lubricating oil of the existing structure is easy to run off, so that the lubrication between the fan driving shaft and the inner wall of the bearing is insufficient, and the abnormal sound is easy to generate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air conditioner assembly, especially a bearing mounting structure for air conditioner fan and air conditioner. BACKGROUND

[0002] In the fan structure of the existing air conditioner indoor hanging machine, the fan driving shaft is arranged in the fan, the fan is fixed on the fan driving shaft, the fan rotates synchronously with the fan driving shaft, one end of the fan driving shaft is connected with the driving shaft of the direct current motor, and the other end is installed on the bearing structure. The bearing structure generally comprises a bearing, a shaft sleeve and a shell, the shaft sleeve is sleeved on the circumferential side of the bearing, the shaft sleeve and the shell are used for fixing the bearing, the center of the bearing has a through hole, the fan driving shaft is inserted into the through hole of the bearing, and the fan driving shaft rotates in the through hole.

[0003] When the air conditioner operates, the fan rotates, and at this time, the fan driving shaft and the inner wall of the through hole of the bearing have relative friction movement. In actual application, lubricating oil is usually added to the matching area of the fan driving shaft and the inner wall of the through hole of the bearing to reduce the friction therebetween. However, the shaft sleeve does not block the side of the bearing away from the fan, and the lubricating oil will overflow on the side of the bearing away from the fan when the fan driving shaft rotates, resulting in loss of the lubricating oil in the matching area of the fan driving shaft and the inner wall of the through hole of the bearing, and thus the lubrication between the fan driving shaft and the inner wall of the bearing is insufficient, causing an irritating noise during friction between the two. This condition affects the user's experience, and excessive wear also shortens the service life of the air conditioner. UTILITY MODEL CONTENTS

[0004] To solve the technical problem that the lubricating oil of the existing structure is easy to flow out, and thus the lubrication between the fan driving shaft and the inner wall of the bearing is insufficient and an irritating noise is easy to be produced, the utility model provides a bearing mounting structure for air conditioner fan and air conditioner for reducing lubricating oil overflow.

[0005] The utility model solves the technical problems thereof by adopting the technical scheme of:

[0006] The bearing mounting structure for air conditioner fan comprises a fan driving shaft, a bearing, a shaft sleeve and a shell, the center of the bearing has a through hole penetrating a bearing left plane and a bearing right plane, the first end of the fan driving shaft is arranged in the through hole through the bearing left plane, the fan shaft rotates in the through hole, the shaft sleeve is sleeved on the circumferential side of the bearing, the shell is sleeved outside the shaft sleeve, and the shaft sleeve and the bearing are fixed. An oil blocking piece is arranged on the inner wall of the shaft sleeve on the side of the bearing right plane, the oil blocking piece is an annular protrusion extending from the inner wall of the shaft sleeve to the central axis of the fan driving shaft, the annular protrusion forms a central hole, the fan driving shaft is arranged in the central hole, and the fan driving shaft is gap-fitted with the central hole.

[0007] Further, the gap between the fan drive shaft and the central hole is 0.1mm-0.2mm.

[0008] Further, the right surface of the annular protrusion forms a cavity with the inner wall of the shaft sleeve, and the first end of the fan drive shaft is located in the cavity.

[0009] Further, the shaft sleeve and the annular protrusion are made of rubber material.

[0010] The utility model also provides a kind of air conditioner, including the bearing mounting structure for air conditioner fan described in any one embodiment of above.

[0011] Further, it includes base frame, fan and DC motor, DC motor is fixed on base frame, fan drive shaft is arranged in fan, fan is fixed on fan drive shaft, fan and fan drive shaft synchronous rotary motion, the second end of fan drive shaft is connected with DC motor drive shaft, shell is fixed on base frame.

[0012] The utility model has the advantages of:

[0013] The utility model discloses a bearing right plane one side's shaft sleeve inner wall is provided with oil baffle, effectively solve the problem that traditional design lubricating oil is easy to overflow.Specifically, oil baffle adopts the annular protrusion design that extends from the inner wall of the shaft sleeve to the central axis of the fan drive shaft, and a central hole is formed therebetween, so that the fan drive shaft is arranged in the central hole and cooperates with the gap.This design not only realizes good blocking of lubricating oil, reduces the overflow of lubricating oil from the side of the bearing away from the fan during the rotation of the fan drive shaft as much as possible, but also ensures that the fan drive shaft can rotate smoothly without obstruction.Therefore, the setting of oil baffle significantly reduces the loss of lubricating oil, ensures the sufficient lubrication between the fan drive shaft and the inner wall of the bearing, effectively eliminates the harsh noise caused by insufficient lubrication, improves the user's experience and prolongs the service life of the air conditioner.In addition, due to the effective retention of lubricating oil, the need for frequent addition or replacement of lubricating oil is also reduced, further saving maintenance cost.

[0014] The right surface of the annular protrusion and the inner wall of the shaft sleeve form a cavity, which effectively collects the possible overflow of lubricating oil.This design not only prevents lubricating oil from leaking to other parts inside the air conditioner, but also protects the cleanliness of the internal environment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the structural schematic diagram of bearing mounting structure for air conditioner fan;

[0016] Fig. 2 It is the explosion schematic diagram of shell, shaft sleeve and bearing;

[0017] Fig. 3is a structural schematic view of components mounted on the bottom frame;

[0018] In the figure, 1 is a fan driving shaft, 2 is a bearing, 3 is a round hole, 4 is a shaft sleeve, 5 is a shell, 6 is a ring-shaped protrusion, 7 is a cavity, 8 is a bottom frame, 9 is a fan, and 10 is a DC motor. DETAILED DESCRIPTION

[0019] To make the purposes, technical solutions and advantages of the embodiments of the present application more clear, the present application is further described below with reference to the drawings.

[0020] First of all, it needs to be stated that the technical solutions of the embodiments of the present application are clearly and completely described, and the described embodiments are part of the embodiments of the present application, rather than a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0021] In the description of the present application, it should be understood that the terms "first", "second", "upper", "lower", "left", "right", "inner", "outer", "axial" or "radial" indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, structure and operation, and therefore cannot be understood as a limitation of the present application.

[0022] It should be noted that in the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be broadly understood, for example, "fixing" can be fixed connection, or detachable connection, or integral: can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Reference Figs. 1-3 The present application provides a bearing mounting structure for an air conditioner fan and an air conditioner.

[0024] As Figs. 1-3As shown, the bearing mounting structure for the air conditioner fan comprises a fan drive shaft 1, a bearing 2, a shaft sleeve 4 and a shell 5. The bearing 2 has a through-hole 3 in the center of the bearing 2, which penetrates the left plane of the bearing 2 and the right plane of the bearing 2. The first end of the fan drive shaft 1 is arranged in the through-hole 3 through the left plane of the bearing 2. The fan shaft 9 rotates in the through-hole 3. The shaft sleeve 4 is arranged on the side of the bearing 2. The shell 5 is arranged outside the shaft sleeve 4 to fix the shaft sleeve 4 and the bearing 2. An oil blocking piece is arranged on the inner wall of the shaft sleeve 4 on the right plane side of the bearing 2. The oil blocking piece is a ring-shaped protrusion 6 extending from the inner wall of the shaft sleeve 4 to the central axis of the fan drive shaft 1. The ring-shaped protrusion 6 forms a central hole, and the fan drive shaft 1 is arranged in the central hole. The fan drive shaft 1 is in clearance fit with the central hole.

[0025] As shown in the drawings, Fig. 2 For the bearing 2, a conventional ball bearing in the art can be selected, which includes an inner ring and an outer ring. The fan drive shaft 1 is fixed relative to the inner ring, and the inner ring and the outer ring move relative to each other. Alternatively, a bearing 2 without an inner ring and an outer ring can be selected. The bearing 2 is a whole. The bearing 2 has a through-hole 3 in the center of the bearing 2, which penetrates the left plane of the bearing 2 and the right plane of the bearing 2. The fan drive shaft 1 rotates in the through-hole 3.

[0026] For the clearance fit between the fan drive shaft 1 and the central hole, the clearance is preferably slightly larger than 0.1 mm, between 0.1 mm and 0.2 mm, and of course can be larger than 0.2 mm, still having a certain oil blocking effect, but the effect is slightly worse.

[0027] This design not only achieves good blocking of lubricating oil, reduces the overflow of lubricating oil from the side of the bearing 2 away from the fan 9 during the rotation of the fan drive shaft 1 as much as possible, but also ensures that the fan drive shaft 1 can rotate smoothly without being hindered. Therefore, the arrangement of the oil blocking piece significantly reduces the loss of lubricating oil, ensures sufficient lubrication between the fan drive shaft 1 and the inner wall of the bearing 2, effectively eliminates the harsh noise caused by insufficient lubrication, improves the user's experience and prolongs the service life of the air conditioner.

[0028] As shown in the drawings, Fig. 1 In the embodiment of the present scheme, the right surface of the ring-shaped protrusion 6 and the inner wall of the shaft sleeve 4 form a cavity 7, and the first end of the fan drive shaft 1 is located in the cavity 7. The cavity 7 can effectively collect the possible overflow of lubricating oil. This design not only prevents the leakage of lubricating oil to other parts inside the air conditioner, but also protects the cleanliness of the internal environment.

[0029] Further, the shaft sleeve 4 and the ring-shaped protrusion 6 are made of rubber material. Rubber material has good damping effect. In addition, by selecting rubber material, even if the ring-shaped protrusion 6 contacts the fan drive shaft 1 due to processing error, no abnormal sound will be generated due to the elastic damping effect of the rubber material. In addition to selecting rubber material, nylon or other composite materials can also be selected.

[0030] The utility model also provides a kind of air conditioner, including the bearing mounting structure for air conditioner fan described in any one embodiment of above. The specific structure of the bearing mounting structure for air conditioner fan refers to above embodiment, since the present air conditioner adopts all technical solutions of above all embodiments, thus at least have all beneficial effects brought by the technical scheme of above embodiment, here no longer repeat.

[0031] As Fig. 3 As shown in the embodiment of the present application, it includes a bottom frame 8, a fan 9 and a DC motor 10. The DC motor 10 is fixed on the bottom frame 8. The fan drive shaft 1 is arranged in the fan 9. The fan 9 is fixed on the fan drive shaft 1. The fan 9 rotates synchronously with the fan drive shaft 1. The second end of the fan drive shaft 1 is connected with the drive shaft of the DC motor 10. The shell 5 is fixed on the bottom frame 8.

Claims

1. A bearing mounting structure for an air conditioner fan, comprising a fan drive shaft (1), a bearing (2), a bushing (4), and a housing (5), wherein the bearing (2) has a circular hole (3) at its center that passes through the left and right planes of the bearing (2), the first end of the fan drive shaft (1) passes through the left plane of the bearing (2) and is inserted into the circular hole (3), the fan (9) shaft rotates within the circular hole (3), the bushing (4) is fitted around the bearing (2), and the housing (5) is fitted outside the bushing (4) for fixing the bushing (4) and the bearing (2), characterized in that: An oil baffle is provided on the inner wall of the bushing (4) on the right side of the bearing (2). The oil baffle is an annular protrusion (6) extending from the inner wall of the bushing (4) toward the central axis of the fan drive shaft (1). The annular protrusion (6) forms a central hole, and the fan drive shaft (1) passes through the central hole with a clearance fit between the fan drive shaft (1) and the central hole.

2. The bearing mounting structure for an air conditioner fan as described in claim 1, characterized in that: The gap between the fan drive shaft (1) and the center hole is 0.1mm-0.2mm.

3. The bearing mounting structure for an air conditioner fan as described in claim 1, characterized in that: The right surface of the annular protrusion (6) forms a cavity (7) with the inner wall of the bushing (4), and the first end of the fan drive shaft (1) is located in the cavity (7).

4. The bearing mounting structure for an air conditioner fan as described in claim 1, characterized in that: Both the bushing (4) and the annular protrusion (6) are made of rubber.

5. An air conditioner, characterized by: Includes the bearing mounting structure for an air conditioner fan as described in any one of claims 1-4.

6. The air conditioner as described in claim 5, characterized in that: It includes a base frame (8), a fan (9) and a DC motor (10). The DC motor (10) is fixed on the base frame (8). The fan drive shaft (1) passes through the fan (9). The fan (9) is fixed on the fan drive shaft (1). The fan (9) and the fan drive shaft (1) rotate synchronously. The second end of the fan drive shaft (1) is connected to the drive shaft of the DC motor (10). The outer shell (5) is fixed on the base frame (8).

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