Air outlet nozzle mounting structure of fan

Abstract

The utility model provides an air outlet nozzle mounting structure of a fan, and belongs to the technical field of machinery. The problem that an existing fan air outlet nozzle is not stable in positioning is solved. The fan comprises a volute, the air outlet nozzle is arranged on the front side of the volute, the mounting structure comprises an air outlet ring formed at the front end of the volute, the air outlet ring is of a rectangular annular structure, an inner hole of the air outlet ring is a volute air outlet, an air inlet ring is arranged at the rear end of the air outlet nozzle, the air inlet ring is connected to the air outlet ring in a sleeved mode, and stepped holes are formed in the side walls of the periphery of the air inlet ring in a penetrating mode. Protruding blocks are formed on the inner side wall of the periphery of the air outlet ring, the number of the protruding blocks is the same as that of the stepped holes, a bolt is arranged in each stepped hole, the rod portion of each bolt is screwed into the corresponding protruding block, strip-shaped grooves are formed in the outer side wall of the periphery of the air outlet ring, and the number of the strip-shaped grooves is the same as that of the protruding blocks. The front end of the strip-shaped groove is open; protruding sliding blocks are arranged on the inner side wall of the air inlet ring, one sliding block is arranged in each strip-shaped groove, and each stepped hole penetrates through the corresponding sliding block. According to the utility model, the air outlet nozzle can be stably positioned.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a fan, and more particularly to a fan outlet mounting structure. Background Technology

[0002] A blower is a type of bladed gas compression machinery. Gas is drawn in through the intake chamber, and the blades do work on the gas, increasing its pressure and speed before it is discharged from the outlet.

[0003] An existing blower structure, such as the blower disclosed in the Chinese Patent Database (application number: 202020504218.1), includes a shell made of plastic material with an internal cavity and a drive motor fixed to one side of the shell. A protruding air outlet, communicating with the internal cavity, is located on the side wall of the shell along its circumference. A fan wheel is fixedly connected to the output shaft of the drive motor. The shell is integral and has a through first mounting hole that connects the internal cavity of the shell to the outside. The outer diameter of the fan wheel is smaller than the inner diameter of the first mounting hole, and the axial centerline of the fan wheel passes through the center of the first mounting hole. An air nozzle, shaped like a duckbill, is fixedly connected to the outer end of the air outlet.

[0004] In the aforementioned blower, the air outlet is fixed to the outer casing by a ring of bolts, and the air outlet has a stepped hole for the bolt to pass through. Since the actual product's air outlet itself is not very thick, the addition of the stepped hole further reduces the thickness of the air outlet at the point supporting the bolt head. This makes the air outlet prone to deformation when the bolt is tightened, affecting its positioning strength and stability. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a fan nozzle installation structure, which solves the technical problem of how to enhance the positioning strength of the nozzle.

[0006] The objective of this utility model can be achieved through the following technical solution: A fan nozzle mounting structure, wherein the fan includes a volute, and the nozzle is located on the front side of the volute. This mounting structure includes a nozzle ring formed on the front end of the volute, the nozzle ring being a rectangular ring structure, and the inner hole of the nozzle ring being the air outlet of the volute. The rear end of the nozzle is an air inlet ring matching the nozzle ring, the air inlet ring being sleeved on the nozzle ring. Stepped holes are provided through the four sides of the air inlet ring, and protrusions are formed on the four sides of the inner side of the nozzle ring, with the number of protrusions and stepped holes being the same. Each stepped hole contains a bolt, and the bolt shank is screwed into the corresponding protrusion. The nozzle ring is characterized by having strip-shaped grooves on the four sides of the outer side of the nozzle ring, with the number of strip-shaped grooves and protrusions being the same and their positions corresponding one-to-one; the length of the strip-shaped grooves extends axially along the nozzle ring, and the front end of the strip-shaped grooves is open; the inner side of the air inlet ring has protruding sliders, each strip-shaped groove containing one of the aforementioned sliders, and each stepped hole penetrating the corresponding slider.

[0007] The same number of sliders as the protrusions are formed on the inner wall of the air inlet ring, and each stepped hole passes through the corresponding slider. This effectively increases the thickness of the air inlet ring at the bolt connection, reduces the deformation of the air inlet ring when the bolt is tightened, strengthens the air inlet ring's ability and strength to support the bolt, and ensures that the air outlet ring and the air inlet ring are stably connected together, thereby stably positioning the air outlet on the volute and enabling the fan to operate stably.

[0008] In the above-mentioned fan outlet mounting structure, the shape and size of the slider are matched with the strip groove, and the slider slides into the corresponding strip groove for installation guidance, which facilitates the assembly of the outlet.

[0009] In the above-mentioned fan outlet mounting structure, the type of the strip groove is a dovetail groove. At this time, the slider is a dovetail block that matches the dovetail groove, so that a limiting structure is formed between the strip groove and the slider to restrict the radial movement of the slider, reducing the stress on the bolt when the outlet is hit, thereby further strengthening the connection strength between the outlet and the volute.

[0010] In the above-mentioned fan outlet mounting structure, the slider presses against the bottom wall of the corresponding strip groove, which reduces the fitting accuracy requirements between the air outlet ring and the air inlet ring, and facilitates design and assembly.

[0011] In the aforementioned fan outlet mounting structure, the protrusion is strip-shaped and its length extends along the axial direction of the outlet ring. This design enhances the protrusion's strength by increasing the contact area between the protrusion and the outlet ring, thus providing a more stable connection to the bolts.

[0012] In the above-mentioned fan outlet mounting structure, the cross-section of the protrusion is arc-shaped to further enhance the strength of the protrusion.

[0013] In the aforementioned fan outlet mounting structure, at least one raised rib is formed on each of the four outer walls of the inlet ring, and the length of the raised rib extends along the axial direction of the inlet ring. The raised ribs are provided to strengthen the outlet ring itself, making the installation of the outlet more stable.

[0014] In the above-mentioned fan outlet mounting structure, the sidewall of the air inlet ring is formed by two short sidewalls and two long sidewalls. The stepped holes on the short sidewalls are provided with the above-mentioned ribs on both sides along the length of the short sidewalls to enhance the strength of the air inlet ring at the stepped hole position.

[0015] Compared with existing technologies, the air outlet mounting structure of this fan has the following advantages:

[0016] 1. The same number of sliders as the protrusions are formed on the inner wall of the air inlet ring, and each stepped hole passes through the corresponding slider. This can effectively increase the thickness of the air inlet ring at the bolt connection, reduce the deformation of the air inlet ring when the bolt is tightened, strengthen the air inlet ring's ability and strength to support the bolt, and ensure that the air outlet ring and the air inlet ring are stably connected together, thereby stably positioning the air outlet on the volute and making the fan run stably.

[0017] 2. The type of the strip groove is a dovetail groove. In this case, the slider is a dovetail block that matches the dovetail groove, so that a limiting structure is formed between the strip groove and the slider to restrict the radial movement of the slider, reduce the stress on the bolt when the air outlet is hit, and thus further strengthen the connection strength between the air outlet and the volute. Attached Figure Description

[0018] Figure 1 This is a 3D schematic diagram of the fan.

[0019] Figure 2 This is a diagram showing the installation of the air outlet.

[0020] Figure 3 This is a three-dimensional schematic diagram of the volute.

[0021] In the diagram, 1 is the volute; 1a is the exhaust ring; 1b is the protrusion; 1c is the strip groove; 2 is the exhaust nozzle; 2a is the intake ring; 2a1 is the short sidewall; 2a2 is the long sidewall; 2b is the stepped hole; 2c is the slider; 2d is the rib; and 3 is the bolt. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figure 1 and Figure 3As shown, in the fan's outlet mounting structure, the fan includes a volute 1, and an outlet 2 is located on the front side of the volute 1. This mounting structure includes an outlet ring 1a formed on the front end face of the volute 1. The outlet ring 1a has a rectangular ring structure, and its inner hole is the outlet of the volute 1. The outer diameter of the outlet ring 1a is smaller than the outer diameter of the front end face of the volute 1, so that an annular mounting step is formed between the outer surface of the outlet ring 1a and the front end face of the volute 1.

[0024] The rear end of the air outlet 2 is an air inlet ring 2a that matches the air outlet ring 1a. The air inlet ring 2a is fitted onto the air outlet ring 1a and presses against the front end face of the volute 1, so that the air outlet 2 is fitted into place in one go. Stepped holes 2b are provided through all four sides of the air inlet ring 2a, and protrusions 1b are formed on all four sides of the inner side of the air outlet ring 1a. The number of protrusions 1b and stepped holes 2b are the same. A bolt 3 is provided in each stepped hole 2b. The shank of the bolt 3 is screwed into the corresponding protrusion 1b, and the head of the bolt 3 presses against the inner wall of the corresponding stepped hole 2b to stably connect the air inlet ring 2a and the air outlet ring 1a.

[0025] like Figure 2 and Figure 3 As shown, the outer walls of the air outlet ring 1a are provided with strip-shaped grooves 1c. The number of strip-shaped grooves 1c and protrusions 1b are the same and their positions correspond one-to-one. The length of the strip-shaped grooves 1c extends along the axial direction of the air outlet ring 1a, and the front end of the strip-shaped grooves 1c is open. The inner wall of the air inlet ring 2a has protruding sliders 2c. Each strip-shaped groove 1c contains one slider 2c, and each stepped hole 2b passes through the corresponding slider 2c.

[0026] The same number of sliders 2c as the protrusions 1b are formed on the inner wall of the air inlet ring 2a, and each stepped hole 2b passes through the corresponding slider 2c. This can effectively increase the thickness of the air inlet ring 2a at the bolt 3 connection, reduce the deformation of the air inlet ring 2a when the bolt 3 is tightened, strengthen the ability and strength of the air inlet ring 2a to support the bolt 3, and ensure that the air outlet ring 1a and the air inlet ring 2a are stably connected together, thereby stably positioning the air outlet 2 on the volute 1 and making the fan run stably.

[0027] To further explain, the shape and size of slider 2c match those of the strip groove 1c, and slider 2c slides into the corresponding strip groove 1c for installation guidance, facilitating the assembly of the air outlet 2. Preferably, the strip groove 1c is a dovetail groove. In this case, slider 2c is a dovetail block that matches the dovetail groove, so that a limiting structure is formed between the strip groove 1c and slider 2c to restrict the radial movement of slider 2c, reducing the stress on bolt 3 when the air outlet 2 is impacted, thereby further strengthening the connection strength between the air outlet 2 and the volute 1.

[0028] Furthermore, the slider 2c presses against the bottom wall of the corresponding strip groove 1c, which reduces the precision requirements for the fit between the air outlet ring 1a and the air inlet ring 2a, facilitating design and assembly. The protrusion 1b is strip-shaped and extends along the axial direction of the air outlet ring 1a. This design enhances the strength of the protrusion 1b by increasing the contact area between it and the air outlet ring 1a, thus providing a more stable connection to the bolt 3. Preferably, the cross-section of the protrusion 1b is arc-shaped to further strengthen its strength.

[0029] like Figure 1 and Figure 3 As shown, at least one raised rib 2d is formed on each of the four outer walls of the air inlet ring 2a, and the length of the raised rib 2d extends along the axial direction of the air inlet ring 2a. The raised rib 2d is provided to strengthen the air outlet ring 1a itself, making the installation of the air outlet 2 more stable. Specifically, the sidewalls of the air inlet ring 2a are formed by two short sidewalls 2a1 and two long sidewalls 2a2. The raised rib 2d is provided on both sides of the stepped hole 2b on the short sidewall 2a1, distributed along the length of the short sidewall 2a1, to enhance the strength of the air inlet ring 2a at the stepped hole 2b location.

[0030] In the actual product, each short sidewall 2a1 and each long sidewall 2a2 is provided with two stepped holes 2b, that is, the total number of stepped holes 2b is eight, and the number of grooves, sliders 2c and protrusions 1b is eight each. Each short sidewall 2a1 and each long sidewall 2a2 is provided with four ribs 2d. On the same long sidewall 2a2, the ribs 2d and the stepped holes 2b are distributed along the length of the long sidewall 2a2, and the four ribs 2d are located between two stepped holes 2b.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A fan nozzle mounting structure, the fan including a volute (1), a nozzle (2) being disposed on the front side of the volute (1), the mounting structure including a nozzle ring (1a) formed on the front end of the volute (1), the nozzle ring (1a) being a rectangular ring structure, and the inner hole of the nozzle ring (1a) being the air outlet of the volute (1), the rear end of the nozzle (2) being an air inlet ring (2a) matching the nozzle ring (1a), the air inlet ring (2a) being sleeved on the nozzle ring (1a), the four sides of the air inlet ring (2a) being provided with stepped holes (2b), the four sides of the inner side of the nozzle ring (1a) being provided with protrusions (1b), and the number of protrusions (1b) and stepped holes (2b) being the same, each stepped hole (2b) being provided with a bolt (3), and the shank of the bolt (3) being screwed into the corresponding protrusion (1b), characterized in that, The outer walls of the air outlet ring (1a) are provided with strip grooves (1c), and the number of strip grooves (1c) and protrusions (1b) are the same and their positions correspond one-to-one. The length of the strip grooves (1c) extends along the axial direction of the air outlet ring (1a), and the front end of the strip grooves (1c) is open. The inner wall of the air inlet ring (2a) has protruding sliders (2c), and each strip groove (1c) has a slider (2c) as described above, and each stepped hole (2b) passes through the corresponding slider (2c).

2. The air outlet mounting structure of the fan according to claim 1, characterized in that, The shape and size of the slider (2c) are matched with the strip groove (1c), and the slider (2c) slides in conjunction with the corresponding strip groove (1c).

3. The air outlet mounting structure of the fan according to claim 2, characterized in that, The type of the strip groove (1c) is a dovetail groove.

4. The air outlet mounting structure of the fan according to claim 1, 2, or 3, characterized in that, The slider (2c) presses against the bottom wall of the corresponding strip groove (1c).

5. The air outlet mounting structure of the fan according to claim 1, 2, or 3, characterized in that, The protrusion (1b) is strip-shaped and its length extends along the axial direction of the air outlet ring (1a).

6. The air outlet mounting structure of the fan according to claim 5, characterized in that, The cross-section of the protrusion (1b) is arc-shaped.

7. The air outlet mounting structure of the fan according to claim 1, characterized in that, At least one rib (2d) is formed on each of the four outer walls of the air inlet ring (2a), and the length of the rib (2d) extends along the axial direction of the air inlet ring (2a).

8. The air outlet mounting structure of the fan according to claim 7, characterized in that, The sidewall of the air inlet ring (2a) is formed by two short sidewalls (2a1) and two long sidewalls (2a2). The stepped hole (2b) on the short sidewall (2a1) is provided with the above-mentioned ribs (2d) on both sides along the length direction of the short sidewall (2a1).

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