Centrifugal fan with impeller convenient to disassemble quickly

Abstract

The centrifugal fan comprises a motor base, the upper end face of the motor base is fixedly connected with a motor box, the end face of one side of the motor box is fixedly connected with a volute, the end, away from the motor box, of the volute is fixedly connected with a connecting disc, a motor is fixedly arranged in the motor box, and an output shaft of the motor is connected with a chuck in a sleeved mode. The impeller is sleeved outside the chuck, the chuck is provided with a plurality of clamping teeth and an input hole, a clamping part is arranged on the back face of the impeller, the chuck is sleeved with the clamping part, a plurality of clamping grooves are formed in an inner ring of the clamping part, the clamping grooves correspond to the clamping teeth in a one-to-one mode, a fastening bolt is arranged in the center of the impeller, and the fastening bolt penetrates through the impeller and the chuck. And the end part of the output shaft of the motor is in threaded connection. According to the utility model, the chuck and the impeller are clamped and positioned, and then the output shaft of the motor, the chuck and the impeller are fixed through the fastening bolts, so that the impeller is convenient to mount and dismount, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a centrifugal fan with an impeller that is easy to quickly disassemble. Background Art

[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. With the continuous development of modern society, centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels and buildings.

[0003] After the existing centrifugal fan has been used for a period of time, the impeller body needs to be disassembled for cleaning. When installing, the existing impeller body needs to be connected to the motor and then fixed to the front end of the casing by bolts. Therefore, when the operator disassembles the impeller body, the bolts at the front end of the impeller body need to be unscrewed one by one. This step will waste a lot of time and reduce the efficiency of subsequent cleaning work. Utility Model Content

[0004] The utility model aims to provide a centrifugal fan with an impeller that is easy to quickly disassemble in view of the defects and shortcomings of the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a centrifugal fan which is easy to quickly disassemble the impeller, including a motor base, an upper end face of the motor base is fixedly connected to a motor box, a side end face of the motor box is fixedly connected to a volute, an upper side of the volute is provided with an air outlet, an middle part of the end face of the volute away from the motor box is provided with an air inlet, and an end of the volute away from the motor box is fixedly connected to a connecting disk. The innovation point is: an electric motor is fixedly arranged inside the motor box, a chuck is sleeved on the output shaft of the electric motor, an impeller is sleeved on the outside of the chuck, the chuck has a plurality of teeth and input holes, a clamping part is arranged on the back side of the impeller, the clamping part is sleeved on the outside of the chuck, and a plurality of slots are arranged on the inner ring of the clamping part, the slots correspond to the teeth one by one, a fastening bolt is arranged at the center of the impeller, the fastening bolt passes through the impeller and the chuck, and is threadedly connected to the end of the output shaft of the motor.

[0006] Furthermore, a positioning flat groove is provided at the front end of the output shaft of the motor, and a sleeve hole matching the positioning flat groove is provided inside the chuck.

[0007] Furthermore, a positioning ring is arranged outside the chuck.

[0008] Furthermore, the slot is clearance-matched with the teeth, and a rubber pad is provided in the slot.

[0009] After adopting the above structure, the utility model has the following beneficial effects:

[0010] The utility model arranges a chuck and an impeller for clamping and positioning, and then fixes the motor output shaft, the chuck and the impeller by fastening bolts. This method is convenient for installing and disassembling the impeller, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Description of reference numerals:

[0013] 1 motor seat, 2 motor box, 3 volute, 4 air outlet, 5 air inlet, 6 connecting plate, 7 motor, 8 chuck, 81 clamping teeth, 82 input hole, 9 impeller, 91 clamping part, 92 clamping groove, 10 fastening bolt, 11 positioning ring. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0016] See also Figure 1A centrifugal fan for facilitating quick removal of an impeller comprises a motor base 1, an upper end face of the motor base 1 is fixedly connected to a motor box 2, an end face of one side of the motor box 2 is fixedly connected to a volute 3, an upper side of the volute 3 is provided with an air outlet 4, an end face of the volute away from the motor box is provided with an air inlet 5, an end of the volute 3 away from the motor box is fixedly connected to a connecting plate 6, an electric motor 7 is fixedly arranged inside the motor box 2, a chuck 8 is sleeved on the output shaft of the electric motor 7, an impeller 9 is sleeved on the outside of the chuck 8, the chuck 8 has a plurality of teeth 81 and an input hole 82, a clamping portion 91 is arranged on the back side of the impeller 9, the clamping portion 91 is sleeved on the outside of the chuck 8, and a plurality of slots 92 are arranged on the inner ring of the clamping portion, the slots 92 correspond to the teeth 81 one by one, a fastening bolt 10 is arranged at the center of the impeller 9, the fastening bolt 10 passes through the impeller 9 and the chuck 8, and is threadedly connected to the end of the output shaft of the motor. Specifically, when installing the impeller 9 for the first time, first put the clamping portion 91 of the impeller 9 on the chuck 8, then insert the wrench into the input hole 82 and rotate it, so that the clamping teeth 81 extend outward and embed into the clamping groove 92, so as to realize the installation of the impeller 9 and the chuck 8, and then the chuck 8 is put on the output shaft of the motor 7 and fixed by the fastening bolts 10, and finally the connecting disk 6 is fixed and installed; when the impeller 9 needs to be removed, the connecting disk 6 is first removed, and then the impeller 9 is rotated so that the input hole 82 of the chuck 8 faces the air outlet 4, and then the wrench is inserted from the air outlet 4 and embedded into the input hole 82 The impeller 9 is then taken out by removing the fastening bolt 10; when installing the impeller 9 again, the fastening portion 91 of the impeller 9 is put on the chuck 8, and then a wrench is inserted into the input hole 82 and rotated, so that the fastening tooth 81 extends outward and is embedded in the slot 92, thereby realizing the installation of the impeller 9 and the chuck 8, and then fixed by the fastening bolt 10, and finally the connecting plate 6 is fixed and installed; the chuck 8 is a mechanical device used to clamp the workpiece on the machine tool, and its specific structure and working principle are not described in this application.

[0017] In this embodiment, a positioning flat groove is provided at the front end of the motor output shaft, and a sleeve hole matching the positioning flat groove is provided inside the chuck for positioning the installation of the chuck to ensure that the slot 92 can correspond radially one-to-one with the tooth 81.

[0018] In this embodiment, a positioning ring 11 is disposed outside the chuck 8 to ensure that the clamping groove 92 can correspond to the clamping teeth 81 axially when the impeller 9 is installed.

[0019] In this embodiment, the slot 92 and the tooth 81 are clearance-matched, and a rubber pad is provided in the slot to improve the sealing performance of the slot 92 and the tooth 81 during installation, thereby preventing the gap from being too large and affecting the stability of the impeller rotation.

[0020] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A centrifugal fan for facilitating quick removal of an impeller, comprising a motor base, an upper end surface of the motor base being fixedly connected to a motor box, a side end surface of the motor box being fixedly connected to a volute, an upper side of the volute being provided with an air outlet, a side end surface of the volute being away from the motor box being provided with an air inlet in the middle, and a connection plate being fixedly connected to one end of the volute being away from the motor box, Features: An electric motor is fixedly installed inside the motor box, a chuck is sleeved on the output shaft of the motor, an impeller is sleeved on the outside of the chuck, the chuck has a plurality of teeth and an input hole, a clamping portion is arranged on the back of the impeller, the clamping portion is sleeved on the outside of the chuck, and a plurality of slots are arranged on the inner ring of the clamping portion, the slots correspond to the teeth one by one, a fastening bolt is arranged at the center of the impeller, the fastening bolt passes through the impeller and the chuck, and is threadedly connected to the end of the output shaft of the motor.

2. A centrifugal fan with an impeller that is easy to quickly disassemble according to claim 1, Features: A positioning flat groove is arranged at the front end of the output shaft of the motor, and a sleeve hole matching the positioning flat groove is arranged inside the chuck.

3. A centrifugal fan with an impeller that is easy to quickly disassemble according to claim 1, Features: A positioning ring is arranged outside the chuck.

4. A centrifugal fan with an impeller that is easy to quickly disassemble according to claim 1, Features: The clamping slot is clearance-matched with the clamping teeth, and a rubber pad is arranged in the clamping slot.

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