LIFT MECHANISM AND AIR SUPPLY DEVICE WITH LIFT MECHANISM

Abstract

A lift mechanism and air supply device with lift mechanism, the lift mechanism includes a cylinder, a threaded rod rotationally arranged in the cylinder, a power source for driving the threaded rod to rotate and a threaded holder in threaded connection with the threaded rod, the threaded holder is configured to install the air supply mechanism, a space is formed between the support bracket and the threaded holder, one end of the threaded rod extends between the support bracket and the threaded holder, and a guiding element for preventing the threaded holder from rotating is arranged between the cylinder and the threaded holder.

Claims

1. A lift mechanism, comprising a cylinder, a threaded rod rotationally arranged in the cylinder, a power source for driving the threaded rod to rotate, and a threaded holder in threaded connection with the threaded rod, wherein an air supply mechanism is connected to the threaded holder, and a guiding element for preventing the threaded holder from rotating is arranged between the cylinder and the threaded holder.

2. The lift mechanism according to claim 1, wherein an inner wall of the cylinder is provided with an installation plate, an end of the threaded rod is assembled with a stationary base, the stationary base is rotationally connected to the installation plate, the power source is installed at a side of the installation plate departing from the threaded rod, and the power source is connected to the stationary base, such that the power source drives the stationary base and the threaded rod to rotate.

3. The lift mechanism according to claim 2, wherein the installation plate is provided with an extension stand, the extension stand extends in a direction to the threaded rod, an installation cavity is defined at a side of the extension stand departing from the threaded rod, the power source is installed in the installation cavity, and the stationary base is rotationally connected to the extension stand.

4. The lift mechanism according to claim 3, wherein an end of the stationary base departing from the threaded rod is provided with a ring flange, an external diameter of the ring flange is greater than an external diameter of the stationary base, a circular groove for rotation of the ring flange is defined in the extension stand, the extension stand is further connected with a reinforcing member, and the reinforcing member is configured to prevent the stationary base from detaching from the circular groove.

5. The lift mechanism according to claim 4, wherein the reinforcing member comprises a pressing plate on the extension stand, the pressing plate is covered on the circular groove, a side of the pressing plate departing from the extension stand is provided with a collar, and the stationary base is rotationally connected to the collar.

6. The lift mechanism according to claim 5, wherein the power source is provided with a rotation shaft, a side wall of the rotation shaft is provided with an abutting face, a slot is defined in the stationary base, the slot is adapted to the rotation shaft, and the rotation shaft is inserted in the slot, such that the stationary base is driven to rotate by rotation of the rotation shaft.

7. The lift mechanism according to claim 6, wherein a bottom end of the cylinder is rotationally connected to a housing, a driving member is installed in the housing, and the driving member is configured to drive the cylinder to rotate back and forth above the housing.

8. The lift mechanism according to claim 7, wherein the housing is provided with an extension pillar, the bottom end of the cylinder is connected with a cover, the cover is rotationally connected to the extension pillar, and the driving member is connected to the cover.

9. An air supply device, comprising a base, an outer shell which is hollow inside, the air supply mechanism and the lift mechanism according to claim 1, wherein the air supply mechanism is located in a housing, the air supply mechanism is installed on a support bracket, and the cylinder is arranged on the base.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 schematically shows the structure of Embodiment 1 of the present application;

[0029] FIG. 2 schematically shows a sectional view of Embodiment 1 of the present application;

[0030] FIG. 3 is an exploded view of the stationary base and the pressing plate in Embodiment 1 of the present application;

[0031] FIG. 4 is a view showing the slot in Embodiment 1 of the present application;

[0032] FIG. 5 is a schematic exploded view of the driving element in Embodiment 1 of the present application;

[0033] FIG. 6 is a schematic view showing the connecting shaft in Embodiment 1 of the present application;

[0034] FIG. 7 is a schematic view of Embodiment 2 of the present application;

[0035] FIG. 8 is a schematic view showing the structure of Embodiment 3 of the present application;

[0036] FIG. 9 is a schematic exploded view of Embodiment 3 of the present application;

[0037] FIG. 10 is a schematic view of the notch in Embodiment 4 of the present application.

DETAILED DESCRIPTION

[0038] The present application is further described in detail below in combination with FIGS. 1-9.

Embodiment 1

[0039] The embodiment of the present application provides a lift mechanism, the lift mechanism is used for an air supply device, such as a tower fan. The lift mechanism is connected to the air supply mechanism 23 in the air supply device, in particular, the lift mechanism is configured to drive the air supply mechanism 23 to move up and down in vertical direction, so as to adjust the vertical height of the air supply mechanism 23. The air supply mechanism 23 of the present embodiment can supply warm air, cold air or natural air.

[0040] Referring to FIG. 1 and FIG. 2, the lift mechanism includes a cylinder 1, a threaded rod 2 rotationally arranged inside the cylinder 1, a power source 3 for driving the threaded rod 2 to rotate, and a threaded holder 4 in threaded connection with the threaded rod 2. The cylinder 1 is cylinder-shaped, the cylinder 1 has an internal hollow structure, and the cylinder 1 stands vertically. The inner wall of the cylinder 1 is provided with an installation plate 7, the threaded rod 2 is rotationally connected to the installation plate 7, and the threaded rod 2 and the cylinder 1 are coaxially arranged. The power source 3 is installed at a side of the installation plate 7 departing from the threaded rod 2, and the power source 3 is connected to the threaded rod 2 to drive the threaded rod 2 to rotate.

[0041] The air supply mechanism 23 is arranged on the threaded holder 4. In the present embodiment, a plurality of support rods 19 are fastened on the threaded holder 4, preferably, three support rods 19 are provided, the support rods 19 are arranged at intervals in a circumferential direction of the threaded holder 4. The top ends of the three support rods 19 are all connected to a same support bracket 5, such that the air supply mechanism 23 is installed on the support bracket 5. The threaded rod 2 extends in the space among the three support rods 19, and the length direction of the threaded rod 2 is parallel to the length direction of the support rod 19. A recess is defined in the surface of the support bracket 5, to connect with the air supply mechanism 23. When the threaded rod 2 drives the threaded holder 4 to move, the support bracket 5 is synchronously driven to move, and consequently the air supply mechanism 23 is driven to move.

[0042] Referring to FIG. 2, the threaded holder 4 is blocky, the threaded rod 2 is in threaded connection with the threaded holder 4, and a guiding element 6 is arranged between the threaded holder 4 and the inner wall of the cylinder 1. The threaded holder 4 can be driven to slide in the axis direction of the cylinder 1 by the rotation of the threaded rod 2 with the help of the guiding element 6. The guiding element 6 includes pegs 61 installed on the side wall of the threaded holder 4, there are three groups of the pegs 61 at intervals along the circumferential direction of the threaded holder 4. Each group contains two pegs above one another in vertical direction. The inner wall of the cylinder 1 is configured with guiding grooves 62, which extend parallel to the axis direction of the cylinder 1, and each peg 61 is inserted in a respective guiding groove 62. When the threaded rod 2 rotates, the pegs 61 can slide in the guiding grooves 62. To reduce the friction between the guiding element 6 and the inner wall of the guiding grooves 62, the end of each peg 61 is arc-shaped.

[0043] Referring to FIG. 2 and FIG. 3, an end of the threaded holder 4 facing to the power source 3 is fastened with a stationary base 8, the stationary base 8 is shaped in form of a circular cylinder, and the power source 3 is connected to the stationary base 8. The power source 3 drives the stationary base 8 to rotate, and consequently drives the threaded rod 2 to rotate. The installation plate 7 is integrally formed with an extension stand 9, the extension stand 9 extends in a directioin to the threaded rod 2, and a side of the extension stand 9 departing from the threaded rod 2 is formed with an installation cavity 10, the power source 3 is installed in the installation cavity 10, and the stationary base 8 is rotationally connected to extension stand 9.

[0044] The outer wall at one end of the stationary base 8 departing from the threaded rod 2 is coaxially fixed with a ring flange 11, the external diameter of the ring flange 11 is greater than the external diameter of the stationary base 8. A circular groove 26 is defined in the extension stand 9, and the ring flange 11 can rotate in the circular groove 26. The extension stand 9 is further provided with a reinforcing member 12, to prevent the ring flange 11 from detaching from the circular groove 26.

[0045] The reinforcing member 12 includes a pressing plate 121 on the extension stand 9, the pressing plate 121 is installed in a side of the extension stand 9 departing from the installation cavity 10 through a screw etc., and the pressing plate 121 can be covered on the circular groove 26. The pressing plate 121 is fixed with a collar 122, the collar 122 and the stationary base 8 are coaxially arranged, and the stationary base 8 is rotationally connected to the collar 122. The pressing plate 121 and the collar 122 play a role of positioning, to prevent the ring flange 11 from detaching from the circular groove 26, and consequently improve the rotation stability of the stationary base 8. Further, the surfaces of the extension stand 9 and of the installation plate 7 are both provided with reinforcing ribs at intervals, to improve the strength of the extension stand 9 and the installation plate 7.

[0046] Referring to FIG. 3 and FIG. 4, in a further development, the power source 3 is a motor, and the motor is provided with a rotation shaft 13, the rotation shaft 13 is connected to the stationary base 8, so as to drive the stationary base 8 to rotate. The side wall of the rotation shaft 13 is provided with an abutting face 14, a slot 15 is defined in the stationary base 8, the slot 15 is adapted to the rotation shaft 13, and the rotation shaft 13 is slidably inserted in the slot 15. When the rotation shaft 13 rotates, the stationary base 8 can be synchronously driven to rotate. In other embodiments, the cross-section of the rotation shaft 13 can also be polygonal, the slot 15 is adapted to the rotation shaft 13, such that the stationary base 8 can be driven to rotate when the rotation shaft rotates. The rotation shaft 13 is in sliding engagement with the slot 15, such that when the threaded rod 2 is displaced upwards during transportation or other processes, the rotation shaft 13 can slide in the slot 15, so the force is not easily transmitted to the power source 3, thereby improving the stability of the power source 3.

[0047] In a further development, referring to FIG. 2 and FIG. 5, the bottom end of the cylinder 1 is rotationally connected with a housing 16, the housing 16 is hollow inside. A driving member 17 is installed in the housing 16, the driving member 17 is configured to drive the cylinder 1 to rotate back and forth above the housing 16, thereby driving the air supply mechanism 23 to rotate back and forth. The top surface of the housing 16 is fixed with an extension pillar 20, the bottom of the cylinder 1 is fixed with a cover 27, which is rotationally connected to the extension pillar 20 by a bearing. A space is formed between the cover 27 and the installation plate 7, a plurality of screws are connected between the cover 27 and the installation plate 7, to connect the cover 27 and the installation plate 7 together.

[0048] Referring to FIG. 6, the bottom of the cover 27 is fixed with a connecting shaft 29, an arc-shaped groove 28 is defined on the top surface of the housing 16, and the connecting shaft 29 extends to the inner cavity of the housing 16 through the arc-shaped groove 28. The driving member 17 includes a driving motor 171 fixed in the housing 16, a connecting rod 172 connected to an output shaft of the driving motor 171 and a connecting sheet 173 rotationally connected to the connecting rod 172. A notch 18 is defined at the end of the connecting sheet 173 departing from the connecting rod 172, one end of the connecting shaft 29 is inserted in the notch 18 and can rotate relative to notch 18. The driving motor 171 drives the connecting sheet 173 to move via the connecting rod 172, thereby driving the connecting shaft 29 to slide back and forth in the arc-shaped groove 28.

[0049] The implement principle of the lift mechanism in the embodiment of the present application is as follows. The power source 3 drives the threaded rod 2 to rotate. Because the threaded holder 4 is in threaded connection with the threaded rod 2, the threaded rod 2 rotates, such that the threaded holder 4 is driven to move up and down in the cylinder 1 and the support bracket 5 is synchronously driven to move up and down with the help of the guiding element 6. The air supply mechanism 23 is installed on the support bracket 5, therefore, the height position of the air supply mechanism 23 can be adjusted synchronously. The air supply mechanism generally has an outer shell, the bottom end of the air supply mechanism 23 is connected to the support bracket 5, while the top end thereof is connected to the outer shell of the air supply mechanism, such that the out shell is synchronously driven to move when the air supply mechanism 23 moves up and down. In order to improve the stability in use, the outer shell and the cylinder can be further provided with a limit assembly in form of block-slot, such that it is more stable when the air supply mechanism 23 drives the housing to move synchronously.

Embodiment2

[0050] Referring to FIG. 7, the present embodiment is different from embodiment 1 in that the air supply mechanism 23 is directly installed on the threaded holder 4. When the air supply mechanism 23 is installed on the threaded holder 4, the threaded rod 2 can pass through the bottom end of the air supply mechanism 23 and extend to the inner cavity of the air supply mechanism 23. Therefore, when the threaded rod 2 drives the threaded holder 4 to move up and down, there will be no interference between the threaded rod 2 and the air supply mechanism 23. In this embodiment, the bottom end of the air supply mechanism 23 is rotationally connected to the threaded holder 4, and the top end of the air supply mechanism 23 is rotationally connected to the inner wall at the top end of the outer shell.

Embodiment 3

[0051] The present application provides an air supply device, referring to FIG. 8 and FIG. 9, which includes a base 21, an outer shell 22 which is hollow inside, an air supply mechanism 23 and the lift mechanism of Embodiment 1 or Embodiment 2, the air supply mechanism 23 and the lift mechanism are located in the outer shell 22, and the air supply mechanism 23 is connected to the inner wall of the outer shell 22. The housing 16 is installed on the base 21 via threaded bolts or other means, and the base 21 is of a structure with a large top and a small bottom, thereby improving the stability of the base 21 placed on the ground.

[0052] The outer shell 22 includes a front shell and a rear shell, which are connected with each other by a screw or other means. The outer walls of the front shell and the rear shell are symmetrically configured with grid-shaped air vents, one for air inlet and the other for air outlet. When the threaded rod 2 drives the threaded holder 4 to move upwards, the air supply mechanism 23 and the outer shell 22 can be synchronously driven to move upwards, thereby achieving the adjustment of the air supply position. A limit assembly in form of block-slot can be arranged between the outer shell 22 and the cylinder 1, such that it is more stable when the outer shell 22 slides up and down.

[0053] The air supply mechanism 23 of the present embodiment includes a fan wheel 231 and a first motor 232, the fan wheel 231 is connected to the first motor 232, and the first motor 232 is configured to drive the fan wheel 231 to rotate.

[0054] When the lift mechanism is of the structure in Embodiment 1, the top end of the fan wheel 231 is rotationally connected to the inner wall of the outer shell 22 via a bearing, the first motor 232 is installed on the support bracket 5; and the first motor 232 drives the fan wheel 231 to rotate, thereby supplying air. In the other embodiments, the air supply mechanism can also be a mechanism for supplying warm air. When the lift mechanism is of the structure in Embodiment 2, the bottom end of the fan wheel 231 is rotationally connected to the threaded holder 4, the first motor 232 is installed on the top of the inner wall of the outer shell 22, and the threaded rod 2 extends to the inner cavity of the fan wheel 231, by which the first motor 232 can similarly drive the fan wheel 231 to rotate, and there will be no interference between the fan wheel 231 and the threaded rod 2.

Embodiment

4

[0055] Referring to FIG. 10, this embodiment is different from Embodiment 1 in that the notch 18 in the connecting sheet 173 is slightly larger than the cross section of the connecting shaft, and an elastic layer 25 is symmetrically arranged on the inner wall of the notch 18. When the connecting shaft 29 reciprocates in the arc-shaped groove 28, the connecting shaft 29 can abut against the elastic layer 25. The elastic layer 25 can be a rubber or an airbag, preferably an airbag. When the connecting shaft 29 is driven by the connecting sheet 173 to move in an opposite direction, the connecting shaft 29 can abut against the airbag firstly and decelerate, and then be driven by the connecting sheet 173 to slide in another direction, thereby reducing the inertia of the housing 16 when rotating and improving the stability of the device during use.

[0056] The above are the preferred embodiments of the present application, which are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

LISTING OF REFERENCE SIGNS

[0057] 1 cylinder [0058] 2 threaded rod [0059] 3 power source [0060] 4 threaded holder [0061] 5 support bracket [0062] 6. guiding element [0063] 61 Peg [0064] 62 guiding groove [0065] 7 installation plate [0066] 8 stationary base [0067] 9 extension stand [0068] 10 installation cavity [0069] 11 ring flange [0070] 12. reinforcing member [0071] 121 pressing plate [0072] 122 collar [0073] 13 rotation shaft [0074] 14 abutting face [0075] 15 slot [0076] 16 housing [0077] 17 driving member [0078] 171 driving motor [0079] 172 connecting rod [0080] 173 connecting sheet [0081] 18 notch [0082] 19 support rod [0083] 20 extension pillar [0084] 21 base [0085] 22 outer shell [0086] 23 air supply mechanism [0087] 231 fan wheel [0088] 232 first motor [0089] 24 stationary holder [0090] 25 elastic layer [0091] 26 circular groove [0092] 27 cover [0093] 28 arc-shaped groove [0094] 29 connecting shaft