Square inner rotor axial flow fan

Abstract

The invention provides a square inner rotor axial flow fan, and belongs to the technical field of fans. The axial flow fan solves the problems that due to the fact that the shaft connecting part of an impeller and a motor of an existing axial flow fan is in high-speed operation for a long time, the connecting section of the impeller and the motor is abraded, transmission stability is affected, and the connecting section is prone to cracking. The square inner rotor axial flow fan comprises an impeller composed of blades and a shaft seat, a machine shell is arranged outside the impeller, the end of the shaft seat is provided with an inner threaded hole and connected with a connecting sleeve in a threaded mode, a motor with a machine shaft is further arranged in the machine shell, and the connecting sleeve is connected with the machine shaft through a long-rod nut and screw assembly. The device has the advantages of being easy to disassemble and assemble, efficient and stable in transmission and capable of preventing cracking.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fans and relates to a square inner rotor axial flow fan. BACKGROUND

[0002] The connecting part of the axial flow fan impeller and the motor is in long-term high-speed operation, which causes wear at the connecting section of the two, affects the stability of transmission, and easily causes cracking of the connecting section. SUMMARY

[0003] The application aims at the above problems in the prior art and provides a square inner rotor axial flow fan with high stability.

[0004] The application can be realized by the following technical scheme: a square inner rotor axial flow fan, which comprises an impeller composed of blades and a shaft seat, and is externally provided with a casing, characterized in that the end of the shaft seat is provided with an internal threaded hole, and a connecting sleeve is threadedly connected to the internal threaded hole, a motor with a motor shaft is further arranged in the casing, and the connecting sleeve and the motor shaft are connected through a long rod nut screw assembly. The end of the connecting sleeve is provided with an external protruding cross clamping plate, and the end of the motor shaft is provided with a cross clamping groove for positioning the cross clamping plate. A plurality of long screw grooves one are arranged in the connecting sleeve, the end of the motor shaft is provided with a long screw groove two which is in communication with the long screw groove one, and the long screw groove one and the long screw groove two are connected through the long rod nut screw assembly. The long screw groove two is filled with grease, and an oil guiding assembly is arranged in the long screw groove two.

[0005] In the above square inner rotor axial flow fan, the oil guiding assembly comprises an internal connecting block and a spring, the internal connecting block is threadedly connected into the long screw groove two, and the spring is sleeved on the internal connecting block and abuts against the long rod nut screw assembly.

[0006] In the above square inner rotor axial flow fan, the internal connecting block is integrally composed of an outer rod, a middle rod and an inner rod, the inner rod is threadedly connected into the long screw groove two, the spring is sleeved on the middle rod, and a guide sleeve is sleeved on the outer rod.

[0007] In the above square inner rotor axial flow fan, the long rod nut screw assembly comprises a hollow long screw rod and a nut part locked at the end of the long screw rod, the long screw rod is threadedly screwed into the long screw groove one and the long screw groove two and moves along the inner wall of the guide sleeve, the end of the long screw rod is pressed to one end of the spring, and the other end of the spring abuts against the end of the inner rod.

[0008] In the square inner rotor axial flow fan, the hollow partition plate is arranged in the casing, the motor end portion is provided with a mounting bracket, and the mounting bracket is fixedly connected to the hollow partition plate.

[0009] In the square inner rotor axial flow fan, the outer wall of the cross clamping plate is coated with sealing glue.

[0010] Compared with the prior art, the square inner rotor axial flow fan has the advantages of simple disassembly and assembly, high-efficiency stable transmission and prevention of cracking. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is a sectional view of the square inner rotor axial flow fan.

[0012] Fig. 2 is a perspective view of the connecting sleeve.

[0013] Fig. 3 is a perspective view of the motor and the shaft.

[0014] In the figure, 1 is a blade, 2 is a shaft seat, 3 is a casing, 4 is a connecting sleeve, 5 is a shaft, 6 is a motor, 7 is a cross clamping plate, 8 is a cross clamping groove, 9 is a long screw groove 1, 10 is a long screw groove 2, 11 is a spring, 12 is an outer rod, 13 is a middle rod, 14 is an inner rod, 15 is a guide sleeve, 16 is a long screw rod, 17 is a nut part, 18 is a hollow partition plate, and 19 is a mounting bracket. DETAILED DESCRIPTION

[0015] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0016] As Figs. 1-3As shown, the square inner rotor axial flow fan includes an impeller composed of blades 1 and a shaft seat 2, an outer casing 3 is arranged outside the impeller, the shaft seat 2 has an internal threaded hole at the end, and a connecting sleeve 4 is threadedly connected, a motor 6 with a motor shaft 5 is further arranged inside the casing 3, the connecting sleeve 4 and the motor shaft 5 are connected through a long rod nut screw assembly, the connecting sleeve 4 has an external protruding cross clamping plate 7 at the end, the motor shaft 5 has a cross clamping groove 8 for the cross clamping plate 7 to extend into and be positioned, a plurality of long screw grooves 9 are arranged through the connecting sleeve 4, the motor shaft 5 has long screw grooves 10 at the end which are connected with the long screw grooves 9, the long screw grooves 9 and the long screw grooves 10 are connected through the long rod nut screw assembly, the long screw grooves 10 are filled with grease, the long screw grooves 10 are provided with a grease guiding assembly, the grease guiding assembly includes an inner connecting block and a spring 11, the inner connecting block is threadedly connected into the long screw grooves 10, the spring 11 is sleeved on the inner connecting block and abuts against the long rod nut screw assembly, the inner connecting block is integrally composed of an outer rod 12, a middle rod 13 and an inner rod 14, the inner rod 14 is threadedly connected into the long screw grooves 10, the spring 11 is sleeved on the middle rod 13, a guide sleeve 15 is sleeved on the outer rod 12, the long rod nut screw assembly includes a hollow long screw rod 16 and a nut member 17 locked at the end of the long screw rod 16, the long screw rod 16 is screwed into the long screw grooves 9 and the long screw grooves 10 and moves along the inner wall of the guide sleeve 15, and the end of the long screw rod 16 is pressed to one end of the spring 11, and the other end of the spring 11 abuts against the end of the inner rod 14, the casing 3 is provided with a hollow partition plate 18, and the motor 6 has a mounting bracket 19 at the end, the mounting bracket 19 is fixedly connected to the hollow partition plate 18.

[0017] The outer wall of the cross clamping plate 7 is coated with sealing glue, which forms a seal between the cross clamping groove 8 to prevent dust from entering.

[0018] Through the clamping of the cross clamping plate 7 and the cross clamping groove 8, the preliminary installation and positioning of the product are facilitated. After connection, the long screw rod 16 is connected, and the outer end is locked by the nut member 17, so as to achieve the fixed connection of the connecting sleeve 4 and the motor shaft 5. In the process of screwing in the long screw rod 16, the long screw rod 16 is screwed into the guide sleeve 15 and abuts against the spring 11. When the motor 6 works, it rotates at high speed as a whole. The grease is dispersed to the threaded position of the long screw rod 16 in the spiral direction of the spring 11, which prevents wear and tear, forms high-efficiency transmission, and prevents the shaft connection from cracking.

[0019] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

[0020] Although this document frequently uses terms such as blade 1, shaft seat 2, housing 3, connecting sleeve 4, shaft 5, motor 6, cross clamp 7, cross groove 8, long threaded groove one 9, long threaded groove two 10, spring 11, outer rod 12, middle rod 13, inner rod 14, guide sleeve 15, long threaded rod 16, nut 17, hollow partition 18, and mounting bracket 19, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A square internal rotor axial flow fan, comprising an impeller composed of blades (1) and a shaft seat (2), with a casing (3) surrounding the impeller, characterized in that, The end of the bearing seat (2) has an internal threaded hole and is threadedly connected to a connecting sleeve (4). The housing (3) is also equipped with a motor (6) with a machine shaft (5). The connecting sleeve (4) and the machine shaft (5) are connected by a long rod nut screw assembly. The connecting sleeve (4) has an outwardly protruding cross plate (7) at its end, and the machine shaft (5) has a cross groove (8) at its end for the cross plate (7) to extend into for positioning. The connecting sleeve (4) has several long threaded grooves (9) through it, and the end of the machine shaft (5) has a long threaded groove (10) that communicates with the long threaded grooves (9). The long threaded grooves (9) and the long threaded grooves (10) are connected by the long rod nut screw assembly. The long spiral groove (10) is filled with grease, and an oil guiding component is provided in the long spiral groove (10).

2. A square internal rotor axial flow fan according to claim 1, characterized in that, The oil guiding assembly includes an inner block and a spring (11). The inner block is threaded into the long threaded groove (10), and the spring (11) is sleeved on the inner block and abuts against the long rod nut thread assembly.

3. A square internal rotor axial flow fan according to claim 2, characterized in that, The inner connecting block is composed of an outer rod (12), a middle rod (13) and an inner rod (14) as a whole. The inner rod (14) is threaded in the long threaded groove (10). The spring (11) is sleeved on the middle rod (13). The outer rod (12) is sleeved with a guide sleeve (15).

4. A square internal rotor axial flow fan according to claim 2, characterized in that, The long rod nut assembly includes a hollow long rod (16) and a nut (17) locked to the end of the long rod (16). The long rod (16) is threaded into the first long groove (9) and the second long groove (10) and moves inward along the outer wall of the guide sleeve (15). The end of the long rod (16) is pressed against one end of the spring (11), and the other end of the spring (11) abuts against the end of the inner rod (14).

5. A square internal rotor axial flow fan according to claim 1, characterized in that, The housing (3) is provided with a hollow partition (18), and the motor (6) has a mounting bracket (19) at its end, which is fixedly connected to the hollow partition (18).

6. A square internal rotor axial flow fan according to claim 1, characterized in that, The outer wall of the cross-shaped card plate (7) is coated with sealant.

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