Motor fan mounting structure

Abstract

The utility model provides a motor fan installation structure comprising an abutting ring which is sleeved on a rotor shaft and abuts against a shaft shoulder of the rotor shaft; the spline housing is arranged on the rotor shaft in a sleeving manner and is in interference fit with the rotor shaft; the fan is arranged on the spline sleeve in a sleeving mode, and one end of the fan abuts against the abutting ring; and the locking structure is fixedly arranged on the rotor shaft and is provided with an abutting fixing position, and the abutting fixing position abuts against the other end of the fan and is fixedly connected with the fan. The motor fan mounting structure provided by the utility model is provided with the abutting ring which can be sleeved on the rotor shaft and abuts against the shaft shoulder of the rotor shaft, so that the spline housing can be prevented from directly abutting against the shaft shoulder. The spline housing is arranged and can be in interference fit with the rotor shaft. The fan is arranged, can be arranged on the spline housing in a sleeving mode and abuts against the abutting ring. The locking structure is arranged and can be fixedly connected with the rotor shaft and the fan, and loads generated when the fan is started and braked can be borne through the spline housing and the rotor bearing.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor fans, and particularly relates to a motor fan mounting structure. Background Art

[0002] The connection between the external fan of the motor and the rotor shaft is a key step to ensure the efficient operation of the fan, which directly affects the performance of the fan and the heat dissipation effect of the motor. The direct connection method is that in a small motor, one end of the fan usually abuts against the shoulder of the protruding end of the rotor shaft and is directly fixed to the protruding end of the rotor shaft by a key connection or a fastening screw. This connection method is simple and effective, and can ensure the synchronous rotation of the fan and the rotor. The external fan of the motor is usually installed on the outer shell of the motor, and the installation position is generally at the non-driving end of the motor.

[0003] In the prior art, when installing the motor fan, it relies on a connecting key at the hole to connect to the motor shaft. Under the starting and braking states, the fan will bear a large load impact, and the connecting key will shear and break brittlely, with poor adaptability and poor practicability. Summary of the Utility Model

[0004] An embodiment of the utility model provides a motor fan mounting structure, aiming to solve the problem of poor adaptability of the existing connection method of the external motor fan.

[0005] To achieve the above object, the technical solution adopted by the utility model is: to provide a motor fan mounting structure, including:

[0006] An abutting ring, sleeved on the rotor shaft, and one end of the abutting ring abuts against the shoulder of the rotor shaft;

[0007] A spline sleeve, sleeved on the rotor shaft, the inner wall of the spline sleeve is in interference fit with the rotor shaft, and one end of the spline sleeve abuts against the other end of the abutting ring;

[0008] A fan, sleeved on the spline sleeve, and one end of the fan abuts against the other end of the abutting ring;

[0009] A locking structure, fixedly arranged on the rotor shaft, having an abutting and fixing position, the abutting and fixing position abuts against the other end of the fan, and the abutting and fixing position is fixedly connected to the fan.

[0010] In a possible implementation manner, the locking structure includes:

[0011] A positioning cover, covering the protruding end of the rotor shaft and fixedly connected to the rotor shaft;

[0012] A plurality of first bolts, arranged annularly along the axis of the rotor shaft on the positioning cover, and passing through the positioning cover to be threadedly connected to the rotor shaft;

[0013] Second bolts, a plurality of which are provided, and the plurality of second bolts are annularly arranged around the axis of the rotor shaft on the positioning cover and penetrate through the positioning cover to be threadedly connected with the fan;

[0014] Wherein, the circumferential radius of the second bolts is greater than the circumferential radius of the first bolts.

[0015] In a possible implementation manner, the fan includes:

[0016] A connecting cylinder sleeved on the spline sleeve, and a keyway adapted to the spline sleeve is provided in the inner cavity of the connecting cylinder;

[0017] Blades, a plurality of which are provided, and the plurality of blades are annularly arranged around the axis of the connecting cylinder on the outer wall of the connecting cylinder, and each blade is integrally connected with the connecting cylinder;

[0018] Wherein, threaded holes for threaded connection of the second bolts are provided on the connecting cylinder.

[0019] In a possible implementation manner, a first rubber washer is provided between the abutting ring and the shoulder of the rotor shaft, and the first rubber washer is used to prevent the abutting ring from wearing the rotor shaft.

[0020] In a possible implementation manner, a second rubber washer is provided between the abutting ring and the spline sleeve, and the second rubber washer is used to prevent the abutting ring from wearing the spline sleeve.

[0021] In a possible implementation manner, a third rubber washer is provided between the positioning cover and the spline sleeve, and the third rubber washer is used to prevent the positioning cover from wearing the spline sleeve and simultaneously pressing the spline sleeve to prevent the spline sleeve from displacing along the axis direction of the rotor shaft.

[0022] In a possible implementation manner, a plurality of compensating washers are provided between the positioning cover and the fan, the plurality of compensating washers are arranged in one-to-one correspondence with the plurality of second bolts, and each compensating washer is sleeved on the corresponding second bolt and is located between the positioning cover and the fan.

[0023] In this implementation manner, compared with the prior art, an abutting ring is provided, which can be sleeved on the rotor shaft and abuts against the shoulder of the rotor shaft, so that the spline sleeve can be prevented from directly abutting against the shoulder. A spline sleeve is provided, which can be in interference fit with the rotor shaft. A fan is provided, which can be sleeved on the spline sleeve and abuts against the abutting ring. A locking structure is provided, which can be fixedly connected with the rotor shaft and the fan, and the load generated during the starting and braking states of the fan can be borne by the spline sleeve and the rotor shaft. The ability to bear load impact is strong, the adaptability is good, and the practicability is good. Brief Description of the Drawings

[0024] Figure 1 Schematic diagram of the installation structure of the motor fan installation structure provided by the embodiment of the present utility model;

[0025] Figure 2 Schematic diagram of the spline sleeve of the motor fan installation structure provided by the embodiment of the present utility model;

[0026] Figure 3 Schematic diagram of the fan of the motor fan installation structure provided by the embodiment of the present utility model;

[0027] Description of the reference numerals:

[0028] 10, abutting ring; 20, spline sleeve; 30, fan; 31, connecting cylinder; 32, fan blade; 40, locking structure; 41, positioning cover; 42, first bolt; 43, second bolt; 50, first rubber washer; 60, second rubber washer; 70, third rubber washer; 80, compensating washer; 90, rotor shaft. Detailed Description of the Preferred Embodiments

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0030] Please refer to Figures 1 to 3 together, and now the installation structure of the motor fan 30 provided by the present utility model will be described. The installation structure of the motor fan 30 includes an abutting ring 10, a spline sleeve 20, a fan 30 and a locking structure 40. The abutting ring 10 is sleeved on the rotor shaft 90, and one end of the abutting ring 10 abuts against the shoulder of the rotor shaft 90. The spline sleeve 20 is sleeved on the rotor shaft 90, and the inner wall of the spline sleeve 20 is in interference fit with the rotor shaft 90. One end of the spline sleeve 20 abuts against the other end of the abutting ring 10. The fan 30 is sleeved on the spline sleeve 20, and one end of the fan 30 abuts against the other end of the abutting ring 10. The locking structure 40 is fixed on the rotor shaft 90 and has an abutting and fixing position. The abutting and fixing position abuts against the other end of the fan 30 and is fixedly connected to the fan 30.

[0031] The installation structure of the motor fan 30 provided in this embodiment, compared with the prior art, is provided with an abutting ring 10 which can be sleeved on the rotor shaft 90 and abuts against the shoulder of the rotor shaft 90, so as to avoid the spline sleeve 20 directly abutting against the shoulder. The spline sleeve 20 is provided, which can be in interference fit with the rotor shaft 90. The fan 30 is provided, which can be sleeved on the spline sleeve 20 and abuts against the abutting ring 10. The locking structure 40 is provided, which can be fixedly connected with the rotor shaft 90 and the fan 30. The load generated during the starting and braking states of the fan 30 can be borne by the spline sleeve 20 and the rotor shaft 90, and it has strong load impact resistance, good adaptability and good practicability.

[0032] In some embodiments, the above-mentioned locking structure 40 can adopt the structure as Figure 1 shown. Refer to Figure 1 . The locking structure 40 includes: a positioning cover 41, a first bolt 42 and a second bolt 43. The positioning cover 41 is covered on the protruding end of the rotor shaft 90 and is fixedly connected with the rotor shaft 90. There are a plurality of first bolts 42, and the plurality of first bolts 42 are annularly arranged around the axis of the rotor shaft 90 on the positioning cover 41 and penetrate through the positioning cover 41 to be threadedly connected with the rotor shaft 90. There are a plurality of second bolts 43, and the plurality of second bolts 43 are annularly arranged around the axis of the rotor shaft 90 on the positioning cover 41 and penetrate through the positioning cover 41 to be threadedly connected with the fan 30.

[0033] Among them, the circumferential radius of the second bolt 43 is greater than that of the first bolt 42.

[0034] The positioning cover 41 can be covered on the protruding end of the rotor shaft 90 and fixedly connected with the rotor shaft 90 through a plurality of first bolts 42. The second bolt 43 can penetrate through the positioning cover 41 to be threadedly connected with the fan 30. The load generated during the starting and braking states of the fan 30 can be borne by the rotor shaft 90, and it has strong load impact resistance.

[0035] In some embodiments, the above-mentioned fan 30 can adopt the structure as Figures 1 to 3 shown. Refer to Figures 1 to 3 . The fan 30 includes: a connecting cylinder 31 and fan blades 32. The connecting cylinder 31 is sleeved on the spline sleeve 20, and a keyway adapted to the spline sleeve 20 is provided in the inner cavity of the connecting cylinder 31. There are a plurality of fan blades 32, and the plurality of fan blades 32 are annularly arranged around the axis of the connecting cylinder 31 on the outer wall of the connecting cylinder 31, and each fan blade 32 is integrally connected with the connecting cylinder 31.

[0036] Among them, a threaded hole for threaded connection of the second bolt 43 is provided on the connecting cylinder 31.

[0037] The connecting cylinder 31 and the fan blades 32 can be understood as that multiple fan blades 32 are annularly arranged around the outer wall of the connecting cylinder 31 along the axis of the connecting cylinder 31, and the multiple fan blades 32 are integrally connected to the connecting cylinder 31. The integral connection can be integrally cast or integrally welded.

[0038] It should be noted that a keyway adapted to the spline sleeve 20 is provided in the inner cavity of the connecting cylinder 31.

[0039] In some embodiments, the above-mentioned abutting ring 10 can adopt a structure as Figure 1 shown. Refer to Figure 1 , a first rubber washer 50 is provided between the abutting ring 10 and the shoulder of the rotor shaft 90. The first rubber washer 50 is used to prevent the abutting ring 10 from wearing the rotor shaft 90.

[0040] The first rubber washer 50 can prevent the abutting ring 10 from wearing the rotor shaft 90, and can improve the connection stability and service life.

[0041] In some embodiments, the above-mentioned abutting ring 10 can adopt a structure as Figure 1 shown. Refer to Figure 1 , a second rubber washer 60 is provided between the abutting ring 10 and the spline sleeve 20. The second rubber washer 60 is used to prevent the abutting ring 10 from wearing the spline sleeve 20.

[0042] The second rubber washer 60 can prevent the abutting ring 10 from wearing the spline sleeve 20, and can improve the connection stability and service life.

[0043] In some embodiments, the above-mentioned positioning cover 41 can adopt a structure as Figure 1 shown. Refer to Figure 1 , a third rubber washer 70 is provided between the positioning cover 41 and the spline sleeve 20. The third rubber washer 70 is used to prevent the positioning cover 41 from wearing the spline sleeve 20, and at the same time presses the spline sleeve 20 to prevent the spline sleeve 20 from displacing along the axis direction of the rotor shaft 90.

[0044] The third rubber washer 70 can prevent the positioning cover 41 from wearing the spline sleeve 20, and at the same time presses the spline sleeve 20 to prevent the spline sleeve 20 from displacing along the axis direction of the rotor shaft 90, and can improve the connection stability and service life.

[0045] In some embodiments, the above-mentioned positioning cover 41 can adopt a structure as Figure 1 shown. Refer to Figure 1 , a plurality of compensating washers 80 are provided between the positioning cover 41 and the fan 30. The plurality of compensating washers 80 are arranged in one-to-one correspondence with the plurality of second bolts 43. Each compensating washer 80 is sleeved on the corresponding second bolt 43 and is located between the positioning cover 41 and the fan 30.

[0046] A plurality of shim washers 80 can be arranged in one-to-one correspondence with a plurality of second bolts 43, and can be arranged between the positioning cover 41 and the fan 30 as a compensating member between the positioning cover 41 and the fan 30.

[0047] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. Motor fan installation structure, characterized in that, Comprising: A contact ring sleeved on the rotor shaft, one end of the contact ring being in contact with the shoulder of the rotor shaft; A spline sleeve sleeved on the rotor shaft, the inner wall of the spline sleeve being in interference fit with the rotor shaft, and one end of the spline sleeve being in contact with the other end of the contact ring; A fan sleeved on the spline sleeve, one end of the fan being in contact with the other end of the contact ring; A locking structure fixed on the rotor shaft, having a contact fixing position which contacts the other end of the fan and is fixedly connected to the fan.

2. The motor fan mounting structure according to claim 1, characterized in that, The locking structure includes: A positioning cover covering the protruding end of the rotor shaft and fixedly connected to the rotor shaft; A plurality of first bolts, which are annularly arranged around the positioning cover along the axis of the rotor shaft and penetrate through the positioning cover to be threadedly connected to the rotor shaft; A plurality of second bolts, which are annularly arranged around the positioning cover along the axis of the rotor shaft and penetrate through the positioning cover to be threadedly connected to the fan; Wherein, the circumferential radius of the second bolts is greater than that of the first bolts.

3. The motor fan mounting structure according to claim 2, characterized in that, The fan includes: A connecting cylinder sleeved on the spline sleeve, and a keyway adapted to the spline sleeve is provided in the inner cavity of the connecting cylinder; A plurality of fan blades, which are annularly arranged around the outer wall of the connecting cylinder along the axis of the connecting cylinder, and each of the fan blades is integrally connected to the connecting cylinder; Wherein, a threaded hole for threaded connection of the second bolts is provided on the connecting cylinder.

4. The motor fan mounting structure according to claim 1, wherein, A first rubber washer is provided between the contact ring and the shoulder of the rotor shaft, and the first rubber washer is used to prevent the contact ring from wearing the rotor shaft.

5. The motor fan mounting structure according to claim 1, characterized in that, A second rubber washer is provided between the contact ring and the spline sleeve, and the second rubber washer is used to prevent the contact ring from wearing the spline sleeve.

6. The motor fan mounting structure according to claim 2, characterized in that, A third rubber washer is provided between the positioning cover and the spline sleeve, and the third rubber washer is used to prevent the positioning cover from wearing the spline sleeve and simultaneously pressing the spline sleeve to prevent the spline sleeve from displacing along the axis of the rotor shaft.

7. The motor fan mounting structure according to claim 2, characterized in that, A plurality of extension washers are provided between the positioning cover and the fan, and the plurality of extension washers are arranged in one-to-one correspondence with the plurality of second bolts. Each of the extension washers is sleeved on the corresponding second bolt and is located between the positioning cover and the fan.

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