CN213016889U

CN213016889U - Novel centrifugal fan

Info

Publication number: CN213016889U
Application number: CN202021760650.3U
Authority: CN
Inventors: 樊德泗
Original assignee: Shaoxing Hangyu Xingrong Fan Co ltd
Current assignee: Shaoxing Hangyu Xingrong Fan Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-04-20
Anticipated expiration: 2030-08-21

Abstract

The utility model discloses a novel centrifugal fan, the on-line screen storage device comprises a base, be provided with spiral case and motor on the base, be provided with the impeller in the spiral case, motor and impeller pass through drive mechanism and connect, drive mechanism includes fixed connection and reaches the belt pulley two of fixed connection on the impeller at the motor output, realize the transmission through the belt between belt pulley one and the belt pulley two and be connected, be provided with hold-down mechanism on the base, hold-down mechanism includes the foot rest, the spacing section of thick bamboo of fixedly connected with on the foot rest, the inside sliding connection of spacing section of thick bamboo has a lift section of thick bamboo, be provided with spacing along the axial on the lift section of thick bamboo perisporium, set up the guide way that is used for spacing card to go into on the spacing section of thick. The utility model has the advantages that: the utility model discloses a set up hold-down mechanism, can compress tightly and relax the belt, make things convenient for the installation and the change of belt, the flexible operation is laborsaving.

Description

Novel centrifugal fan

Technical Field

The utility model relates to a ventilation equipment technical field specifically is a novel centrifugal fan.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion.

In traditional centrifugal fan, the belt pulley is including installing in the motor pulley of motor rotation epaxial and driving impeller pivoted and installing in the fan belt pulley of optical axis, be connected through belt transmission between motor pulley and the fan belt pulley, if do not install and adjust correctly, the inconsistent condition of belt elasticity can appear, and the belt is after long-time the use, the condition that the belt has the fracture crackle can appear, or centrifugal fan belt wearing and tearing are serious appears, lose the obvious condition of commentaries on classics phenomenon, after this kind of condition appears, need change or adjust the belt, and the unable adjustment of distance between the output shaft of traditional centrifugal fan motor and the impeller shaft, make the belt stretch out too tightly, be difficult to change.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is to provide a novel centrifugal fan for solving the problem, which can flexibly and conveniently install and replace the belt.

The utility model realizes the above purpose by the following technical proposal, a novel centrifugal fan comprises a base, a volute and a motor are arranged on the base, an impeller is arranged in the volute, the motor and the impeller are connected by a transmission mechanism, the transmission mechanism comprises a first belt pulley fixedly connected with the output end of the motor and a second belt pulley fixedly connected with the impeller, the first belt pulley and the second belt pulley are in transmission connection by a belt, a pressing mechanism is arranged on the base and comprises a foot rest, a limit cylinder is fixedly connected with the foot rest, a lifting cylinder is slidably connected inside the limit cylinder, a limit strip is arranged on the peripheral wall of the lifting cylinder along the circumferential direction, a guide groove for clamping the limit strip is arranged on the inner peripheral wall of the limit cylinder, a lead screw is rotatably connected with the base and extends into the limit cylinder and is in threaded connection with the lifting cylinder, the top of the lifting cylinder is provided with a connecting seat, and a tensioning wheel used for compressing the belt is arranged on the connecting seat.

By adopting the technical scheme, the pressing mechanism is arranged on the base and comprises a foot rest, the foot rest is fixedly connected with a limiting cylinder, the interior of the limiting cylinder is connected with a lifting cylinder in a sliding manner, the peripheral wall of the lifting cylinder is circumferentially provided with limiting strips, the inner peripheral wall of the limiting cylinder is provided with a guide groove for clamping the limiting strips, the base is rotationally connected with a lead screw, the lead screw extends into the limiting cylinder and is in threaded connection with the interior of the lifting cylinder, the top of the lifting cylinder is provided with a connecting seat, the connecting seat is provided with a tensioning wheel for pressing a belt, an operator rotates the lead screw, the lead screw drives the lifting cylinder to move through threads, the circumferential rotation of the lifting cylinder is blocked by the limiting cylinder, so that the lifting cylinder can only do axial lifting motion, the lifting cylinder drives the tensioning wheel to ascend and descend through the connecting seat, when the belt of the transmission mechanism is replaced, the pressing mechanism releases the belt, after a new belt is replaced, the pressing mechanism presses the belt of the transmission mechanism tightly, so that the belt is tightly attached to the first belt pulley and the second belt pulley, and the belt is not easy to slip.

As a further setting of the utility model, fixedly connected with swivel becket on the lead screw, set up the annular groove who matches with the swivel becket on the foot rest, the swivel becket is used for the card to go into the annular groove and is connected in order to realize the rotation of lead screw and foot rest.

Through adopting above-mentioned technical scheme, because fixedly connected with swivel becket on the lead screw sets up the annular groove that matches with the swivel becket on the foot rest, the swivel becket is used for the card to go into the annular groove and is connected in order to realize the rotation of lead screw and foot rest to the radial motion of lead screw is restricted, can only do the rotation of circumferencial direction, avoids the lead screw to drop from the foot rest, improves the stability when fan uses.

As the utility model discloses a further setting, the connecting seat includes the bottom plate, the bottom plate both sides all are provided with the bearing frame, the take-up pulley rotates to be connected between the bearing frame.

Through adopting above-mentioned technical scheme, because the connecting seat includes the bottom plate, the bottom plate both sides all are provided with the bearing frame, and the take-up pulley rotates to be connected between the bearing frame for the rotation of take-up pulley is very smooth and easy, is rolling friction between take-up pulley and the belt, thereby reduces the loss of belt, has improved the life of belt, has prolonged the change cycle of belt.

As a further setting of the utility model, be provided with the protection casing on the drive mechanism, logical groove has been seted up on the protection casing, the protection casing passes through detachable construction and connects on the base.

Through adopting the above technical scheme, because the last protection casing that is provided with of drive mechanism, thereby at centrifugal fan during operation, avoided the foreign matter to get into drive mechanism and lead to drive mechanism to damage, it leads to the injury still to have avoided the careless operation of user, because logical groove has been seted up on the protection casing, thereby avoid hold-down mechanism's elevating movement to receive the hindrance, because the protection casing passes through detachable construction and connects on the base, thereby the protection casing can be dismantled when changing the belt at every turn, make things convenient for the installation and the dismantlement of belt among the drive mechanism, improve the convenience of fan.

As a further setting of the utility model, detachable construction includes the connection piece of fixed connection in the protection casing both sides, all be provided with a plurality of bolts on the connection piece, set up a plurality of through-holes that are used for the bolt to pass on the base.

Through adopting the above technical scheme, because detachable construction includes the connection piece of fixed connection in protection casing both sides, all be provided with a plurality of bolts on the connection piece, set up a plurality of through-holes that are used for the bolt to pass on the base, when will dismantling the protection casing from the base, only need to use the spanner to screw off the nut from the bolt, then take out the bolt from the through-hole of base, make protection casing and base separation, when will installing the protection casing on the base, only need pass the through-hole on the base to the bolt that sets up on the connection piece, then screw up nut and bolt, make protection casing and base link together, the process convenient and fast of whole dismantlement and installation, the convenience when having improved centrifugal fan and changing the belt.

As a further setting of the utility model, lead screw bottom detachably is connected with the handle.

Through adopting above-mentioned technical scheme, because lead screw bottom detachably is connected with the handle to the user can rotate the handle and drive the lead screw and rotate, reaches laborsaving effect, and because the handle is detachable, can take off the handle after finishing to hold-down mechanism adjustment, reach the effect of preventing the mistake and touching.

As a further setting of the utility model, the handle includes the sleeve, the piece is held to sleeve bottom fixedly connected with, be provided with a plurality of sand grips along circumference on the telescopic internal perisporium, the recess that matches with the sand grip is seted up to the lead screw bottom.

Through adopting the above technical scheme, because the handle includes the sleeve, the piece is held to sleeve bottom fixedly connected with, be provided with a plurality of sand grips along circumference on the telescopic internal perisporium, the recess that matches with the sand grip is seted up to the lead screw bottom, when will be connected handle and lead screw, the recess card that aligns the sand grip on the sleeve of handle bottom the lead screw is gone into, thereby the user can make the lead screw rotate through rotating the handle, when will dismantling the handle from the lead screw, only need follow the recess roll-off of lead screw bottom with the sand grip of handle, thereby avoided the lead screw to touch the rotation because of the mistake, avoid the hold-down mechanism's that has adjusted height to be changed, and whole process convenient and fast, the operation is convenient, the time of operating personnel has.

As a further arrangement of the utility model, a plurality of circles of anti-skidding convex edges are arranged on the circumferential wall of the tensioning wheel along the circumferential direction.

Through adopting above-mentioned technical scheme, because be provided with a plurality of rings of anti-skidding beads along the circumferencial direction on the perisporium of take-up pulley, increased the frictional force between take-up pulley and the belt, avoided the belt slippage from the take-up pulley, improved novel stability from fan during operation.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a hold-down mechanism has been set up, when changing drive mechanism's belt, hold-down mechanism relaxs the belt to can conveniently easily take out the belt from drive mechanism, after having changed new belt, compress tightly drive mechanism's belt through hold-down mechanism, make closely laminating between belt and belt pulley one and the belt pulley two, the frictional force increase between belt and belt pulley one and the belt pulley two, the transmission is stable between the drive mechanism, difficult slipping.

Drawings

Fig. 1 is a first schematic structural diagram of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is a second schematic structural view of the present invention;

fig. 4 is a schematic structural view of the pressing mechanism of the present invention;

fig. 5 is a half sectional view of the pressing mechanism of the present invention;

fig. 6 is an enlarged schematic view of the structure at B in fig. 5.

Reference numerals: 1. a base; 2. a volute; 3. a motor; 4. an impeller; 5. a first belt pulley; 6. a second belt pulley; 7. a belt; 8. a foot rest; 9. a limiting cylinder; 10. a lifting cylinder; 11. a limiting strip; 12. a guide groove; 13. a screw rod; 14. a tension wheel; 15. a rotating ring; 16. an annular groove; 17. a base plate; 18. a bearing seat; 19. a protective cover; 20. a through groove; 21. connecting sheets; 22. a bolt; 23. a through hole; 24. a handle; 25. A sleeve; 26. a holding block; 27. a convex strip; 28. a groove; 29. and (4) anti-slip ribs.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and 3, a novel centrifugal fan comprises a base 1, a volute 2 and a motor 3 are fixedly connected to the base 1, an impeller 4 is rotatably connected to the volute 2, the motor 3 and the impeller 4 are connected through a transmission mechanism, the transmission mechanism comprises a first belt pulley 5 fixedly connected to an output end of the motor 3 and a second belt pulley 6 fixedly connected to the impeller 4, the first belt pulley 5 and the second belt pulley 6 are in transmission connection through a belt 7, a protective cover 19 is sleeved outside the transmission mechanism, a through groove 20 for a pressing mechanism to pass through is formed in the protective cover 19, the protective cover 19 is connected to the base 1 through a detachable structure, the detachable structure comprises connecting pieces 21 fixedly connected to two sides of the protective cover 19, a plurality of bolts 22 are arranged on the connecting pieces 21, a plurality of through holes 23 for the bolts 22 to pass through are formed in the base 1, and after the bolts 22, the fastening is done by means of a matching nut.

Referring to fig. 2, the bottom of the screw rod 13 is detachably connected with a handle 24, the handle 24 includes a sleeve 25, the bottom of the sleeve 25 is fixedly connected with a holding block 26, a plurality of protruding strips 27 are circumferentially arranged on the inner circumferential wall of the sleeve 25, a groove 28 matched with the protruding strips 27 is formed in the bottom of the screw rod 13, and after the protruding strips 27 enter the groove 28, the handle 24 is clamped with the screw rod 13.

Referring to fig. 4, 5 and 6, a pressing mechanism is arranged on a base 1, the pressing mechanism includes a foot rest 8, a limiting cylinder 9 is fixedly connected to the foot rest 8, a lifting cylinder 10 is slidably connected to the inside of the limiting cylinder 9, a limiting strip 11 is arranged on the outer circumferential wall of the lifting cylinder 10 along the circumferential direction, a guide groove 12 for clamping the limiting strip 11 is arranged on the inner circumferential wall of the limiting cylinder 9, a lead screw 13 is rotatably connected to the base 1, a rotating ring 15 is fixedly connected to the lead screw 13, an annular groove 16 matched with the rotating ring 15 is arranged on the foot rest 8, the rotating ring 15 is used for clamping the annular groove 16 to realize the rotary connection between the lead screw 13 and the foot rest 8, the lead screw 13 extends into the limiting cylinder 9 and is in threaded connection with the inside of the lifting cylinder 10, a connecting seat is arranged on the top of the lifting cylinder 10, a tension pulley 14 for pressing a belt 7, the tension pulley 14 is rotatably connected between the bearing blocks 18, and a plurality of circles of anti-slip ribs 29 are provided on the circumferential wall of the tension pulley 14 in the circumferential direction.

Because the base 1 is provided with the pressing mechanism, the pressing mechanism comprises a foot rest 8, the foot rest 8 is fixedly connected with a limiting cylinder 9, the limiting cylinder 9 is connected with a lifting cylinder 10 in a sliding way, a limiting strip 11 is arranged on the peripheral wall of the lifting cylinder 10 along the circumferential direction, a guide groove 12 for clamping the limiting strip 11 is arranged on the inner peripheral wall of the limiting cylinder 9, the base 1 is connected with a lead screw 13 in a rotating way, the lead screw 13 extends into the limiting cylinder 9 and is connected with the inside of the lifting cylinder 10 in a threaded way, the top of the lifting cylinder 10 is provided with a connecting seat, the connecting seat is provided with a tension wheel 14 for pressing a belt 7, an operator rotates the lead screw 13, the lead screw 13 drives the lifting cylinder 10 to move through threads, when the lifting cylinder 10 wants to rotate in the circumferential direction, the limiting strip 11 on the peripheral wall of the lifting cylinder 10 is blocked by the guide, a section of thick bamboo 10 drives the take-up pulley 14 through the connecting seat and rises and descends, when changing drive mechanism's belt 7, hold-down mechanism relaxes belt 7, thereby can conveniently easily take out belt 7 from drive mechanism, after having changed new belt 7, compress tightly drive mechanism's belt 7 through hold-down mechanism, make belt 7 and belt pulley 5 and the second 6 between closely laminating of belt pulley, the frictional force increase between belt 7 and belt pulley 5 and the second 6 of belt pulley, the transmission is stable between the drive mechanism, difficult slipping.

Because the rotating ring 15 is fixedly connected to the screw rod 13, the annular groove 16 matched with the rotating ring 15 is formed in the foot rest 8, and the rotating ring 15 is clamped into the annular groove 16 to realize the rotating connection of the screw rod 13 and the foot rest 8, the radial movement of the screw rod 13 is limited, the screw rod 13 can only rotate in the circumferential direction, the screw rod 13 is prevented from falling off from the foot rest 8, and the stability of the fan during use is improved.

Because the connecting seat includes bottom plate 17, and bottom plate 17 both sides all are provided with bearing frame 18, and take-up pulley 14 rotates to be connected between bearing frame 18 for take-up pulley 14's rotation is very smooth and easy, is rolling friction between take-up pulley 14 and the belt 7, thereby reduces the loss of belt 7, has improved the life of belt 7, has prolonged the replacement cycle of belt 7.

Because drive mechanism overcoat is equipped with protection casing 19, thereby at centrifugal fan during operation, avoided the foreign matter to get into drive mechanism and lead to drive mechanism to damage, still avoided the careless operation of user to lead to the injury, because logical groove 20 has been seted up on protection casing 19, thereby avoid hold-down mechanism's elevating movement to receive the hindrance, because protection casing 19 passes through detachable construction and connects on base 1, thereby protection casing 19 can be dismantled when changing belt 7 at every turn, make things convenient for the installation and the dismantlement of belt 7 among the drive mechanism, improve the convenience of fan.

Because detachable construction includes the connection piece 21 of fixed connection in protection casing 19 both sides, all be provided with a plurality of bolts 22 on the connection piece 21, a plurality of through-holes 23 that are used for bolt 22 to pass have been seted up on the base 1, when will dismantling protection casing 19 from the base 1, only need to use the spanner to screw the nut from bolt 22, then take out bolt 22 from the through-hole 23 of base 1, make protection casing 19 and base 1 separation, when will installing protection casing 19 on the base 1, only need to pass the through-hole 23 on the base 1 to the bolt 22 that sets up on connection piece 21, then screw up nut and bolt 22, make protection casing 19 link together with base 1, the process convenient and fast of whole dismantlement and installation, convenience when having improved centrifugal fan and having changed belt 7.

Because lead screw 13 bottom detachably is connected with handle 24 to the user can rotate handle 24 and drive lead screw 13 and rotate, reaches laborsaving effect, and because handle 24 is detachable, can take off handle 24 after finishing to hold-down mechanism adjustment, reach the effect of preventing the mistake and touching.

Because the handle 24 includes the sleeve 25, the piece 26 is held to sleeve 25 bottom fixedly connected with, be provided with a plurality of sand grips 27 along circumference on the internal perisporium of sleeve 25, the recess 28 that matches with sand grip 27 is seted up to the lead screw 13 bottom, when will being connected handle 24 and lead screw 13, the recess 28 card that aligns the bottom of lead screw 13 with sand grip 27 on the sleeve 25 of handle 24 is gone into, thereby the user can make lead screw 13 rotate through rotating handle 24, when will dismantling handle 24 from lead screw 13, only need the sand grip 27 of handle 24 along the recess 28 roll-off of lead screw 13 bottom, thereby avoided lead screw 13 to touch the rotation because of the mistake, the height of avoiding the hold-down mechanism who adjusts is changed, and whole process convenient and fast, and convenient operation, operating personnel's time has been saved.

Because be provided with a plurality of rings of anti-skidding bead 29 along the circumferencial direction on the perisporium of take-up pulley 14, increased the frictional force between take-up pulley 14 and the belt 7, when belt 7 rotated, take-up pulley 14 was absorbed in belt 7 certain degree of depth and was hugged closely, had avoided belt 7 slippage from take-up pulley 14, had improved novel stability from fan during operation.

When the operating personnel will change belt 7, at first need take off with the nut of the bolt 22 connection on the connection piece 21 for protection casing 19 loses the relation of connection with base 1, then takes off protection casing 19, makes the drive mechanism who is sheltered from by protection casing 19 expose, will adjust hold-down mechanism afterwards and make belt 7 relax and conveniently take out, and concrete operation is: insert lead screw 13 bottom with 24 joints of handle, rotate handle 24 with the hand, make lead screw 13 rotate, lead screw 13 passes through the motion of screw drive lift section of thick bamboo 10, and the rotation of lift section of thick bamboo 10 circumferencial direction is hindered by spacing section of thick bamboo 9, make lift section of thick bamboo 10 can only be axial descending movement, lift section of thick bamboo 10 drives take-up pulley 14 through the connecting seat and descends, belt 7 must relax, operating personnel takes off belt 7 from belt pulley one 5 and belt pulley two 6, then install new belt 7 on belt pulley one 5 and belt pulley two 6, use hold-down mechanism to compress tightly belt 7 after that, concrete operation does: the handle 24 is rotated in the opposite direction by hand, so that the screw rod 13 rotates in the other direction, the screw rod 13 drives the lifting cylinder 10 to move through threads, the rotation of the lifting cylinder 10 in the circumferential direction is blocked by the limiting cylinder 9, the lifting cylinder 10 can only do axial ascending motion, the lifting cylinder 10 drives the tension wheel 14 to ascend through the connecting seat, the handle 24 is taken down from the screw rod 13 after the belt 7 is tensioned to a proper degree, and then the protective cover 19 is reconnected to the base 1 and shields the transmission mechanism.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a novel centrifugal fan, includes base (1), be provided with spiral case (2) and motor (3) on base (1), be provided with impeller (4) in spiral case (2), motor (3) and impeller (4) are connected through drive mechanism, drive mechanism includes fixed connection belt pulley one (5) and the belt pulley two (6) of fixed connection on impeller (4) of motor (3) output, realize the transmission through belt (7) between belt pulley one (5) and belt pulley two (6) and be connected its characterized in that: be provided with hold-down mechanism on base (1), hold-down mechanism includes foot rest (8), spacing section of thick bamboo (9) of fixedly connected with is gone up in foot rest (8), the inside sliding connection of spacing section of thick bamboo (9) has a section of thick bamboo (10), be provided with spacing (11) along circumference on a section of thick bamboo (10) periphery wall, offer guide way (12) that are used for spacing (11) card to go into on a spacing section of thick bamboo (9) internal perisporium, it is connected with lead screw (13) to rotate on base (1), lead screw (13) stretch into spacing section of thick bamboo (9) and threaded connection inside a section of thick bamboo (10) that goes up and down, a section of thick bamboo (10) top is provided with the connecting seat, be provided with take-up pulley (14).

2. The novel centrifugal fan according to claim 1, characterized in that: fixedly connected with swivel becket (15) on lead screw (13), set up annular groove (16) with swivel becket (15) matching on foot rest (8), swivel becket (15) are used for the card to go into annular groove (16) and are connected in order to realize the rotation of lead screw (13) and foot rest (8).

3. The novel centrifugal fan according to claim 1, characterized in that: the connecting seat comprises a bottom plate (17), bearing seats (18) are arranged on two sides of the bottom plate (17), and the tensioning wheel (14) is rotatably connected between the bearing seats (18).

4. The novel centrifugal fan according to claim 1, characterized in that: the automatic transmission mechanism is characterized in that a protective cover (19) is arranged on the transmission mechanism, a through groove (20) is formed in the protective cover (19), and the protective cover (19) is connected to the base (1) through a detachable structure.

5. The novel centrifugal fan according to claim 4, characterized in that: the detachable structure comprises connecting pieces (21) fixedly connected to two sides of the protective cover (19), a plurality of bolts (22) are arranged on the connecting pieces (21), and a plurality of through holes (23) for the bolts (22) to pass through are formed in the base (1).

6. The novel centrifugal fan according to claim 1, characterized in that: the bottom of the screw rod (13) is detachably connected with a handle (24).

7. The novel centrifugal fan according to claim 6, characterized in that: handle (24) include sleeve (25), piece (26) are held to sleeve (25) bottom fixedly connected with, be provided with a plurality of sand grips (27) along circumference on the internal perisporium of sleeve (25), recess (28) with sand grip (27) matching are seted up to lead screw (13) bottom.

8. The novel centrifugal fan according to claim 1, characterized in that: the peripheral wall of the tension wheel (14) is provided with a plurality of circles of anti-skidding ribs (29) along the circumferential direction.