Centrifugal fan with belt wheel structure

Abstract

The utility model discloses a centrifugal fan with a belt wheel structure, which relates to the field of fans and is characterized by comprising a frame, a motor and an impeller are arranged on the frame, a first belt wheel is fixedly connected onto a shaft of the motor, a second belt wheel is fixedly connected onto a shaft of the impeller, and a transmission belt is sleeved on the first belt wheel and the second belt wheel. An adjusting rod is slidably connected to the frame, a third belt wheel is rotatably connected to the adjusting rod, and the transmission belt bypasses the third belt wheel. According to the utility model, when the third belt wheel moves towards the direction close to the connecting line between the first belt wheel and the second belt wheel, the transmission belt is loosened, so that related personnel can conveniently take down the transmission belt, avoid excessive deformation of the transmission belt, reversely move the adjusting rod to tighten the transmission belt after a new transmission belt is replaced, and then limit the movement of the adjusting rod through the limiting piece; and stable transmission is realized, and the running stability of the fan is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan field, more specifically, it relates to a centrifugal fan with pulley structure. BACKGROUND

[0002] Centrifugal fan is a kind of fluid machinery widely used in ventilation, air conditioning and industrial equipment, and it generates centrifugal force by impeller rotation to realize gas delivery, to improve transmission efficiency and adapt to different working condition requirements, part centrifugal fan adopts pulley structure, connects motor and fan impeller shaft by transmission belt (such as V belt, synchronous belt etc.), realizes power transmission, and this transmission mode has the advantages such as buffering vibration, overload protection and speed regulation convenience.

[0003] However, in actual use, the centrifugal fan with pulley structure needs to disassemble transmission belt to maintain, replace or adjust sometimes, currently, the common disassembly mode is to pry or manually force transmission belt to be elastically deformed, so that it is separated from pulley groove, and this operation mode is more laborious, and frequent or improper prying can cause transmission belt surface wear.

[0004] Therefore, a new scheme is needed to solve this problem, and the utility model provides another technical scheme to solve the technical problem. UTILITY MODEL CONTENT

[0005] In view of the deficiencies in the prior art, the utility model aims at providing a centrifugal fan with pulley structure.

[0006] The above technical purpose of the utility model is realized by the following technical scheme: a centrifugal fan with pulley structure, including frame, the frame is equipped with motor and impeller, the shaft of motor is fixedly connected with first pulley, the shaft of impeller is fixedly connected with second pulley, transmission belt is sleeved on first pulley and second pulley, adjusting rod is slidably connected on the frame, third pulley is rotatably connected on adjusting rod, transmission belt passes through third pulley, the distance from third pulley to the line connecting first pulley and second pulley changes along with the sliding of adjusting rod, the frame is equipped with limiting piece for limiting the movement of adjusting rod.

[0007] The utility model is further provided with: the side wall of frame is rotatably connected with rotating plate, adjusting rod is fixedly connected on rotating plate, and adjusting rod is located on one side of rotating plate axis.

[0008] The utility model is further provided with: limiting piece is slidably connected on the side wall of frame, and the edge of rotating plate is provided with insertion slot for the insertion of limiting piece.

[0009] The utility model is further provided with: third pulley is detachably connected on adjusting rod.

[0010] The utility model further sets up: the circumferential wall of adjusting rod is fixedly connected with mounting plate, the one end of adjusting rod is detachably connected with the card block away from the frame, third belt pulley is located between mounting plate and card block.

[0011] The utility model further sets up: be equipped with the ball bearing on the mounting plate, the ball bearing is equipped on the one end of third belt pulley close to mounting plate.

[0012] The utility model further sets up: the one end of adjusting rod is rotatably connected with handle away from the frame, handle is coaxial with adjusting rod.

[0013] Summarized above, the utility model has following beneficial effect: when third belt pulley moves to the direction close to the line between first belt pulley and second belt pulley, transmission belt is slack, and it is convenient for relevant personnel to remove transmission belt, avoids transmission belt excessive deformation, after replacing new transmission belt, reversely moves adjusting rod, makes transmission belt tight, again through the movement of limiting part adjusting rod, realizes stable transmission, guarantees the stability of fan operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is structure diagram of the utility model Figure 1 ;

[0015] Figure 2 It is structure diagram of the utility model Figure 2 ;

[0016] Figure 3 It is Figure 2 Enlarged view of A in the utility model.

[0017] Fig. in: 1, frame;2, first belt pulley;3, second belt pulley;4, transmission belt;5, adjusting rod;6, third belt pulley;7, limiting part;8, rotating plate;9, mounting plate;10, card block;11, ball bearing;12, handle. DETAILED DESCRIPTION

[0018] The utility model is described in detail below in combination with the drawings and examples.

[0019] Example: a centrifugal fan with pulley structure, as Figure 1 、 Figure 2 、 Figure 3As shown, including frame 1, frame 1 is provided with motor and impeller, the shaft of the motor is fixedly connected with first pulley 2, the shaft of the impeller is fixedly connected with second pulley 3, the first pulley 2 and the second pulley 3 are sleeved with transmission belt 4, the front of frame 1 is fixedly connected with volute, the blades on the impeller are all located in the volute, the shaft of the impeller extends to the back of frame 1 through the volute, the shaft end of the impeller is drivingly connected with the second pulley 3 through the key, the motor is located on the side of the volute away from the air outlet, the shaft of the motor is drivingly connected with the first pulley 2 through the key, the frame 1 is slidingly connected with the adjusting rod 5, the third pulley 6 is rotatably connected with the adjusting rod 5, the transmission belt 4 passes through the third pulley 6, the distance from the third pulley 6 to the line between the first pulley 2 and the second pulley 3 changes with the sliding of the adjusting rod 5, the frame 1 is provided with a limiting piece 7 for limiting the movement of the adjusting rod 5, the end faces of the first pulley 2, the second pulley 3 and the third pulley 6 are flush, three mutually parallel transmission belts 4 are sleeved outside the first pulley 2, the second pulley 3 and the third pulley 6, when the first pulley 2 rotates under the drive of the motor, the second pulley 3 rotates, driving the impeller to rotate, the centrifugal fan starts to work, at this time, because the third pulley 6 is rotatably connected with the adjusting rod 5, so the adjusting rod 5 remains stationary, when it is necessary to stop and dismount the transmission belt 4, the third pulley 6 is moved towards the line between the first pulley 2 and the second pulley 3, the transmission belt 4 is relaxed, which is convenient for the relevant personnel to remove the transmission belt 4, avoiding excessive deformation of the transmission belt 4, after replacing the new transmission belt 4, the adjusting rod 5 is moved reversely, the transmission belt 4 is taut, the movement of the adjusting rod 5 is limited by the limiting piece 7, realizing stable transmission and ensuring the stability of the fan operation.

[0020] As shown in Figure 1 , Figure 2 , Figure 3 , the side wall of the frame 1 is rotatably connected with a rotating plate 8, the adjusting rod 5 is fixedly connected with the rotating plate 8, the adjusting rod 5 is located on one side of the axis of the rotating plate 8, the limiting piece 7 is slidingly connected with the side wall of the frame 1, the edge of the rotating plate 8 is provided with a slot for inserting the limiting piece 7, the eccentric adjusting rod 5 on the rotating plate 8 makes a circular motion with the rotation of the rotating plate 8, as seen from the back of the frame 1, the rotating plate 8 is located below the second pulley 3, and at the same time, the rotating plate 8 is located to the right of the first pulley 2, when the adjusting rod 5 makes a circular motion, the distance from the adjusting rod 5 to the first pulley 2 and the second pulley 3 changes, the limiting piece 7 is between the first pulley 2, the second pulley 3 and the rotating plate 8, the shape of the cross section of one end of the limiting piece 7 matches the shape of the cross section of the slot, when the rotating plate 8 is rotated to the angle at which the transmission belt 4 is taut, the sliding slot of the limiting piece 7 is aligned with the slot, the limiting piece 7 is inserted into the slot, limiting the rotation of the rotating plate 8.

[0021] As shown in Figure 1 , Figure 2 , Figure 3As shown, the third belt wheel 6 is detachably connected to the adjusting rod 5, the adjusting rod 5 is fixedly connected with the mounting plate 9 on the circumferential wall, the end of the adjusting rod 5 away from the frame 1 is detachably connected with the clamping block 10, the third belt wheel 6 is located between the mounting plate 9 and the clamping block 10, the detachable structure of the third belt wheel 6 facilitates the maintenance and replacement of the third belt wheel 6, the third belt wheel 6 is clamped in the middle by the clamping block 10 and the mounting plate 9, the mounting plate 9 is provided with the ball bearing 11, the ball bearing 11 is sleeved on the end of the third belt wheel 6 close to the mounting plate 9, the side of the mounting plate 9 towards the clamping block 10 is integrally formed with the surrounding edge, the ball bearing 11 is clamped in the surrounding edge, the end of the third belt wheel 6 close to the mounting plate 9 is integrally formed with the connecting end, the connecting end is inserted into the ball bearing 11, the ball bearing 11 reduces the resistance received by the rotation of the third belt wheel 6, the end of the adjusting rod 5 away from the frame 1 is rotationally connected with the handle 12, the handle 12 is coaxial with the adjusting rod 5, the clamping block 10 is annular, and the clamping block 10 is connected with the adjusting rod 5 through threads, the inner diameter of the third belt wheel 6 and the inner diameter of the clamping block 10 are both greater than the maximum diameter of the handle 12, so the handle 12 will not affect the installation and dismounting of the third belt wheel 6 and the clamping block 10, and the existence of the handle 12 facilitates the rotation of the rotating plate 8 by the relevant personnel.

[0022] The preferred embodiments of the present application have been described above, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical scheme falling within the idea of the present application belongs to the protection scope of the present application. It should be noted that, for the ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. A centrifugal fan with a pulley structure, comprising a frame (1), wherein a motor and an impeller are mounted on the frame (1), a first pulley (2) is fixedly connected to the shaft of the motor, and a second pulley (3) is fixedly connected to the shaft of the impeller, and a transmission belt (4) is fitted onto the first pulley (2) and the second pulley (3), characterized in that: An adjusting rod (5) is slidably connected to the frame (1), and a third pulley (6) is rotatably connected to the adjusting rod (5). The transmission belt (4) passes around the third pulley (6). The distance from the third pulley (6) to the line connecting the first pulley (2) and the second pulley (3) changes as the adjusting rod (5) slides. A limiting member (7) is provided on the frame (1) to restrict the movement of the adjusting rod (5).

2. The centrifugal fan with a pulley structure according to claim 1, characterized in that: A rotating plate (8) is rotatably connected to the side wall of the frame (1), and an adjusting rod (5) is fixedly connected to the rotating plate (8). The adjusting rod (5) is located on one side of the axis of the rotating plate (8).

3. The centrifugal fan with a pulley structure according to claim 2, characterized in that: The limiting member (7) is slidably connected to the side wall of the frame (1), and the edge of the rotating plate (8) is provided with a slot for the limiting member (7) to be inserted.

4. The centrifugal fan with a pulley structure according to claim 1, characterized in that: The third pulley (6) is detachably connected to the adjusting rod (5).

5. The centrifugal fan with a pulley structure according to claim 4, characterized in that: An installation plate (9) is fixedly connected to the circumferential wall of the adjusting rod (5). A locking block (10) is detachably connected to one end of the adjusting rod (5) away from the frame (1). The third pulley (6) is located between the installation plate (9) and the locking block (10).

6. The centrifugal fan with a pulley structure according to claim 5, characterized in that: The mounting plate (9) is provided with a ball bearing (11), which is sleeved on the end of the third pulley (6) near the mounting plate (9).

7. The centrifugal fan with a pulley structure according to claim 2, characterized in that: The end of the adjusting rod (5) away from the frame (1) is rotatably connected to a handle (12), and the handle (12) is coaxial with the adjusting rod (5).

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