Fan with blades convenient to replace

Abstract

The utility model discloses a fan with blades convenient to replace, which relates to the technical field of fans, and comprises a casing, a base, a motor and a connecting shaft, the base is welded at the bottom end of the casing, the motor is mounted in the casing through bolts, the output end of the motor is connected with the connecting shaft through a coupler, and the connecting shaft is connected with the base through bolts. And four groups of connecting grooves extending to the outer side are formed in the connecting shaft. The four sets of limiting blocks are pushed towards the inner side, the limiting blocks push the springs to conduct compression deformation, the limiting blocks move to be separated from the limiting grooves, the connecting cover arranged on the outer side of the connecting shaft in a sleeving mode is taken down, the connecting cover of a new blade is arranged on the outer wall of the connecting shaft in a sleeving mode, and the limiting blocks are pushed to limit the limiting grooves through reset of the springs. The connecting cover and the connecting shaft are clamped and limited through the limiting block, so that the blades of the fan are convenient to replace, normal operation of the fan can be guaranteed by replacing the damaged blades in time, and shutdown caused by the blade problem is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan with convenient blade replacement. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Fan is China's customary abbreviation for gas compression and gas delivery machinery. Commonly referred to fans include ventilators, blowers and wind turbines.

[0003] When the fan is in use, the fan motor is connected to an external power source and the motor is started. The motor drives the fan blades to rotate, causing air to flow around the fan blades. The existing fan motor and fan blades are connected and fixed by multiple sets of bolts. Since the fan blades are located in the fan casing and the inner cavity of the fan casing is relatively narrow, it is inconvenient to disassemble the bolts, which affects the efficiency of replacing the fan blades. Utility Model Content

[0004] The utility model aims to provide a fan with easy-to-replace blades, so as to solve the problem of inconvenient replacement of fan blades in the current market as mentioned in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a fan for easy replacement of blades, comprising a casing, a base, a motor and a connecting shaft, wherein the base is welded to the bottom end of the casing, the motor is installed inside the casing by bolts, and the output end of the motor is connected to the connecting shaft by a coupling.

[0006] Preferably, the connecting shaft is provided with four groups of connecting grooves extending to the outside, the outer wall of the connecting shaft is sleeved with a connecting cover, the outer wall of the connecting cover is welded with a blade body, and the outer wall of the connecting cover is provided with four groups of limiting grooves.

[0007] Preferably, a connecting frame extending into the connecting groove is arranged inside the connecting shaft, and limiting blocks extending into the limiting groove are sleeved on all four sides of the connecting frame, and springs are arranged inside the four groups of limiting blocks at one end of the connecting frame.

[0008] Preferably, a protective net is connected to the front end of the casing via bolts.

[0009] Preferably, both sides of the base are connected to support rods via rotating shafts, the inner sides of the bottom ends of the two groups of support rods are connected to connecting blocks via rotating shafts, and the interiors of the two groups of connecting blocks are penetrated by bidirectional threaded rods.

[0010] Preferably, a rotating block is welded to one end of the bidirectional threaded rod, a fixing frame is sleeved on the outer side of the support rod on the outer wall of the bidirectional threaded rod, and a guide plate is welded to the inner side of the fixing frame.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. When the blades of the fan are replaced, the four sets of limit blocks are pushed inward, the limit blocks push the springs to compress and deform, the limit blocks move and separate from the limit grooves, the connection cover sleeved on the outside of the connecting shaft is removed, the connection cover of the new blade is sleeved on the outer wall of the connecting shaft, the limit blocks are pushed to limit the limit grooves by spring reset, the connection cover and the connecting shaft are engaged and limited by the limit blocks, so that the blades of the fan are easy to replace. By replacing damaged blades in time, the normal operation of the fan can be guaranteed, and shutdown caused by blade problems can be avoided.

[0013] 2. When the height of the fan needs to be adjusted, the bidirectional threaded rod is reversed by the rotating block, and the reversal of the bidirectional threaded rod drives the two groups of connecting blocks threadedly connected to the bidirectional threaded rod to move, and the distance between the two groups of connecting blocks is gradually shortened. The movement of the two groups of connecting blocks drives the bottom end of the support rod to move through the rotating shaft, and the movement of the bottom end of the support rod drives the top end of the support rod to push the base and the casing to rise, so that the height of the fan can be adjusted, so that the fan can adapt to different working environments and needs, thereby improving the applicability of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 It is a three-dimensional cutaway view of the connecting shaft of the utility model;

[0016] Figure 3 This is an exploded view of the connecting shaft of the utility model;

[0017] Figure 4 It is a three-dimensional cutaway view of the fixing frame of the utility model.

[0018] In the figure: 1. casing; 101. protective net; 2. base; 201. support rod; 202. connecting block; 203. bidirectional threaded rod; 204. rotating block; 205. fixing frame; 206. guide plate; 3. motor; 4. connecting shaft; 401. connecting groove; 402. connecting cover; 403. blade body; 404. limiting groove; 405. connecting frame; 406. limiting block; 407. spring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The utility model provides a technical solution: a fan for easy replacement of blades, comprising a casing 1, a base 2, a motor 3 and a connecting shaft 4, the bottom end of the casing 1 is welded with the base 2, the inside of the casing 1 is installed with the motor 3 by bolts, and the output end of the motor 3 is connected with the connecting shaft 4 by a coupling.

[0021] See also Figure 1 , Figure 2 and Figure 3 It can be known that four groups of connecting grooves 401 extending to the outside are opened inside the connecting shaft 4, the outer wall of the connecting shaft 4 is sleeved with a connecting cover 402, the outer wall of the connecting cover 402 is welded with a blade body 403, the outer wall of the connecting cover 402 is opened with four groups of limiting grooves 404, the interior of the connecting shaft 4 is provided with a connecting frame 405 extending to the inside of the connecting groove 401, and the connecting frame 405 is sleeved with limiting blocks 406 extending to the inside of the limiting groove 404 all around, and the inside of the four groups of limiting blocks 406 is provided with a spring 407 at one end of the connecting frame 405, one end of the limiting block 406 is snap-connected with the inside of the limiting groove 404, the outer wall of the limiting block 406 is slidably connected to the inner wall of the connecting groove 401, the inner wall of the limiting block 406 is slidably connected to the outer wall of the connecting frame 405, and the inner wall of the connecting cover 402 is slidably connected to the outer wall of the connecting shaft 4.

[0022] In specific implementation, when it is necessary to replace the blades of the fan, the operator removes the bolts fixing the protective net 101 with an inner hexagonal wrench, removes the protective net 101 from one end of the casing 1, pushes the four sets of limit blocks 406 inward, and the limit blocks 406 slide on the outer wall of the connecting frame 405. At the same time, the limit blocks 406 push the spring 407 to compress and deform, and the limit blocks 406 move to separate from the limit groove 404. The connection cover 402 sleeved on the outer side of the connecting shaft 4 is removed, and the connection of the new blade is connected. The cover 402 is sleeved on the outer wall of the connecting shaft 4, the limit block 406 slides on the inner wall of the connecting cover 402, the limit groove 404 moves to one end of the limit block 406, the spring 407 loses the limit and resets, the spring 407 pushes the limit block 406 to limit the limit groove 404, and the connection cover 402 and the connecting shaft 4 are engaged and limited by the limit block 406, so that the blades of the fan are easy to replace. By replacing damaged blades in time, the normal operation of the fan can be guaranteed to avoid shutdown caused by blade problems.

[0023] See also Figure 1 It can be seen that the front end of the housing 1 is connected with a protective net 101 via bolts.

[0024] During specific implementation, the fan is protected by the protection net 101 to prevent larger debris from being drawn into the fan and affecting the operation of the fan.

[0025] See also Figure 1 and Figure 4 It can be seen that both sides of the base 2 are connected to support rods 201 through a rotating shaft, the inner sides of the bottom ends of the two groups of support rods 201 are connected to connecting blocks 202 through a rotating shaft, the interiors of the two groups of connecting blocks 202 are penetrated by a two-way threaded rod 203, one end of the two-way threaded rod 203 is welded with a rotating block 204, the outer wall of the two-way threaded rod 203 is located on the outer side of the support rod 201 and is sleeved with a fixing frame 205, the inner side of the fixing frame 205 is welded with a guide plate 206, the inner wall of the connecting block 202 is threadedly connected to the outer wall of the two-way threaded rod 203, and the outer wall of the connecting block 202 is slidably connected to the inner side of the guide plate 206.

[0026] During specific implementation, when the height of the fan needs to be adjusted, the operator reverses the rotating block 204, and the reversal of the rotating block 204 drives the two-way threaded rod 203 to reverse, and the reversal of the two-way threaded rod 203 drives the two groups of connecting blocks 202 threadedly connected to the two-way threaded rod 203 to move, and the distance between the two groups of connecting blocks 202 gradually shortens, and the two groups of connecting blocks 202 slide on the inner side of the guide plate 206. The movement of the two groups of connecting blocks 202 drives the bottom end of the support rod 201 to move through the rotating shaft, and the movement of the bottom end of the support rod 201 drives the top end of the support rod 201 to push the base 2 to rise, and the rise of the base 2 drives the casing 1 to rise, so that the height of the fan can be adjusted, so that the fan can adapt to different working environments and needs, thereby improving the applicability of the fan.

[0027] To sum up: the motor 3 is connected to an external power source, the motor 3 is started, and the output end of the motor 3 drives the connecting shaft 4, the connecting cover 402 and the blade body 403 to rotate through the coupling, and the rotation of the blade body 403 drives the air to flow, and the air flows and forms an airflow.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, 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. A fan for convenient blade replacement, comprising a housing (1), a base (2), a motor (3) and a connecting shaft (4), characterized in that: A base (2) is welded to the bottom end of the casing (1); a motor (3) is installed inside the casing (1) by means of bolts; an output end of the motor (3) is connected to a connecting shaft (4) by means of a coupling; four groups of connecting grooves (401) extending to the outside are provided inside the connecting shaft (4); a connecting cover (402) is sleeved on the outer wall of the connecting shaft (4); a blade body (403) is welded on the outer wall of the connecting cover (402); four groups of limiting grooves (404) are provided on the outer wall of the connecting cover (402); a connecting frame (405) extending to the inside of the connecting groove (401) is provided inside the connecting shaft (4); limiting blocks (406) extending to the inside of the limiting groove (404) are sleeved around the connecting frame (405); springs (407) are provided inside the four groups of limiting blocks (406) at one end of the connecting frame (405).

2. A fan with easy blade replacement according to claim 1, characterized in that: The front end of the casing (1) is connected to a protective net (101) via bolts.

3. A fan with easy blade replacement according to claim 2, characterized in that: Both sides of the base (2) are connected to support rods (201) via rotating shafts, the inner sides of the bottom ends of the two groups of support rods (201) are connected to connecting blocks (202) via rotating shafts, and the interiors of the two groups of connecting blocks (202) are penetrated by bidirectional threaded rods (203).

4. A fan with easy blade replacement according to claim 3, characterized in that: A rotating block (204) is welded to one end of the bidirectional threaded rod (203), a fixing frame (205) is sleeved on the outer side of the support rod (201) on the outer wall of the bidirectional threaded rod (203), and a guide plate (206) is welded to the inner side of the fixing frame (205).

Images