A screw-driven elevator

Abstract

The present invention discloses a screw-driven elevator, which comprises a guide rail, a screw, a car frame, and a driving mechanism for driving the car frame to move up and down along the screw. A fixed seat is fixed at the top of the guide rail, the top of the screw is fixed on the fixed seat, a first shock-absorbing mechanism is arranged between the top of the screw and the fixed seat, and a second shock-absorbing mechanism is arranged between the driving mechanism and the car frame. In the screw-driven elevator of the present invention, by arranging the first shock-absorbing mechanism at the top of the screw and the second shock-absorbing mechanism between the driving mechanism and the car frame, effective shock absorption of the car is achieved, and the riding comfort is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and particularly to a household elevator driven by a screw. Background Art

[0002] With the advancement of urban construction and the continuous improvement of people's living standards, the market demand for household elevators is also increasing. At present, the household platform elevators on the market are mainly divided into screw drive and steel belt traction drive structures.

[0003] However, in the screw-driven household elevator in the prior art, its drive motor and nut are directly fixedly connected to the car platform. When the elevator runs, the vibration generated by the movement of the motor and the screw nut is directly transmitted to the passengers through the car frame and the car bottom, accompanied by considerable noise and vibration, resulting in very low overall comfort and poor experience. Summary of the Invention

[0004] In view of this, in order to solve the problems of the prior art, the present invention provides an improved screw-driven elevator with low noise and good shock absorption effect.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A screw-driven elevator, comprising a guide rail, a screw, a car frame, and a drive mechanism for driving the car frame to move up and down along the screw. A fixed seat is fixed at the top of the guide rail, the top of the screw is fixed on the fixed seat, a first shock absorption mechanism is arranged between the top of the screw and the fixed seat, and a second shock absorption mechanism is arranged between the drive mechanism and the car frame.

[0007] According to some preferred embodiments of the present invention, the first shock absorption mechanism includes a first gasket, a second gasket, and a first shock absorber located between the first gasket and the second gasket. The first gasket and the second gasket are fixed on the fixed seat, and the top of the screw sequentially passes through the first gasket, the first shock absorber, and the second gasket. In some embodiments, a limiting mechanism is arranged at the top of the screw, and the limiting mechanism is located above the second gasket. At the same time, a third gasket is also arranged between the bottom of the fixed seat and the screw.

[0008] According to some preferred embodiments of the present invention, the drive mechanism is fixed on a fixing plate, a connecting member is arranged between the fixing plate and the car frame, one side of the connecting member is connected to the fixing plate, the other side of the connecting member is connected to the car frame, and a second shock absorber is arranged between the connecting member and the fixing plate and / or between the connecting member and the fixing plate. That is, the second shock absorption mechanism includes a connecting member and a second shock absorber, effectively realizing shock absorption between the drive mechanism and the car frame.

[0009] According to some preferred implementation aspects of the present invention, the first shock absorber and / or the second shock absorber is a rubber pad or an elastic member. The elastic member can be of types such as springs, disc springs, etc.

[0010] According to some preferred implementation aspects of the present invention, it includes an emergency mechanism. The emergency mechanism includes an emergency motor and a sleeve connected to the bottom of the screw. The emergency motor is used to drive the sleeve to rotate. For example, in an emergency situation where the drive mechanism fails, the emergency motor can be started to drive the sleeve to rotate, and then drive the screw to rotate to achieve the movement of the car frame. The sleeve and the screw can be fixed by a cylindrical pin.

[0011] According to some preferred implementation aspects of the present invention, the guiding portion of the guide rail is trapezoidally arranged, and the width on the side close to the car frame is greater than the width on the side far from the car frame; the car frame is provided with guide shoes matching the guiding portion. The cross-section of the guiding portion is a (quasi)-trapezoidal or triangular structure, that is, the width of the guiding portion gradually increases from the side of the hoistway wall to the side of the car frame; the guiding portion includes three guiding walls, one of which is parallel to the hoistway wall, and the other two guiding walls are symmetrically arranged on both sides of this guiding wall, and the included angle with this guiding wall is 60-85°, preferably 80°. And the guide shoes are provided with working portions cooperating with the guiding walls of the guiding portion, and three rollers are respectively arranged on the working portions corresponding to the three guiding walls to cooperate with the guiding walls for guiding.

[0012] According to some preferred implementation aspects of the present invention, the guide rail and the hoistway wall are integrally formed. The hoistway wall can be formed of aluminum alloy and integrally formed with the guide rail.

[0013] According to some preferred implementation aspects of the present invention, the drive mechanism includes a nut sleeved outside the screw and a drive motor for driving the nut to rotate. The drive motor and the nut are connected by a conveyor belt to drive the nut to rotate.

[0014] According to some preferred implementation aspects of the present invention, the drive motor and / or the nut is provided with an outer cover. The outer cover can prevent dust and further reduce noise.

[0015] According to some preferred implementation aspects of the present invention, the drive mechanism further includes a lubrication mechanism for reducing the friction between the nut and the screw.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: For the screw-driven elevator of the present invention, by arranging a first shock-absorbing mechanism at the top of the screw and a second shock-absorbing mechanism between the drive mechanism and the car frame, effective shock absorption of the car is achieved, and the riding comfort is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0018] Figure 1 Structural schematic diagram of the screw-driven elevator in the embodiment of the present invention;

[0019] Figure 2 Schematic connection diagram of the top of the screw and the fixed seat in the embodiment of the present invention;

[0020] Figure 3 For Figure 2 side view in

[0021] Figure 4 Top view of the fixed seat and the first shock-absorbing mechanism in the embodiment of the present invention;

[0022] Figure 5 Schematic cooperation diagram of the driving mechanism and the screw in the embodiment of the present invention;

[0023] Figure 6 Schematic connection diagram of the driving mechanism and the car frame in the embodiment of the present invention;

[0024] Figure 7 Schematic cooperation diagram of the car frame and the guide rail in the embodiment of the present invention;

[0025] Figure 8 Structural schematic diagram after the guide rail, guide shoe and car frame are assembled in the embodiment of the present invention;

[0026] Figure 9 Schematic structural diagram of the guide rail and the hoistway wall in the embodiment of the present invention;

[0027] Figure 10 Schematic structural diagram of the cooperation between the guide rail and the guide shoe in the embodiment of the present invention;

[0028] Figure 11 Schematic structural diagram after the lubrication mechanism is installed on the screw elevator in the embodiment of the present invention;

[0029] Among them: screw-driven elevator - 1, hoistway - 2, screw - 3, car frame - 4, guide shoe - 41, first working part - 411, second working part - 412, third working part - 413, guide groove - 414, guide rail - 5, guiding part - 51, first guiding wall - 511, second guiding wall - 512, third guiding wall - 513, connecting part - 52, driving mechanism - 6, nut - 61, driving motor - 62, conveyor belt - 63, outer cover - 64, lubricating mechanism - 65, oil box - 651, inner ring part - 6511, outer ring part - 6512, bottom plate - 6513, mounting ear - 6514, cover plate - 652, lubricating block - 653, contact part - 6531, absorbing part - 6532, mounting plate - 654, lubricating oil - 655, fixing plate - 66, fixing seat - 7, first shock-absorbing mechanism - 8, first gasket - 81, second gasket - 82, third gasket - 83, first shock absorber - 84, second shock-absorbing mechanism - 9, connecting member - 91, second shock absorber - 92, emergency mechanism - 10, emergency motor - 101, sleeve - 102, through hole - 11, first roller - 121, second roller - 122, third roller - 123, limiting mechanism - 13, hoistway wall - 14. Detailed implementation manner

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] As Figures 1-11 shown, the screw-driven elevator 1 in this embodiment includes a hoistway 2, a guide rail 5, a screw 3, a car frame 4, a driving mechanism 6 for driving the car frame 4 to move up and down along the screw 3, and an emergency mechanism 10. The driving mechanism 6 is fixed on a fixing plate 66, and the fixing plate 66 is sleeved outside the screw 3. A fixing seat 7 is fixed at the top of the guide rail 5, the top of the screw 3 is fixed on the fixing seat 7, a first shock-absorbing mechanism 8 is arranged between the top of the screw 3 and the fixing seat 7, and a second shock-absorbing mechanism 9 is arranged between the driving mechanism 6 and the car frame 4. The screw in this embodiment is a spliced screw, and adjacent screws are thread-connected and fixed by a cylindrical pin.

[0032] As Figure 5 and 6As shown in the figure, the driving mechanism 6 in this embodiment includes a nut 61 sleeved outside the screw 3, a lubricating mechanism 65, and a driving motor 62 for driving the nut 61 to rotate. A conveyor belt 63 is used to connect the driving motor 62 and the nut 61, thereby driving the nut 61 to rotate. The lubricating mechanism 65 is sleeved outside the screw 3 and is used to reduce the frictional force between the nut 61 and the screw 3. An outer cover 64 is provided outside the nut 61, and the outer cover 64 can prevent dust and further reduce noise.

[0033] Specifically, as Figure 11 shown, the lubricating mechanism 65 in this embodiment includes an oil box 651, a cover plate 652, a lubricating block 653 accommodated between the oil box 651 and the cover plate 652, and a mounting plate 654 for fixedly installing the oil box 651. An oil cavity is provided in the oil box 651 for accommodating lubricating oil 655. The oil box 651, the cover plate 652, and the lubricating block 653 are all annularly arranged and sleeved outside the screw 3. One end of the mounting plate 654 is fixed to the oil box 651, the other end of the mounting plate 654 is fixed to the fixing plate 66, and the middle position of the mounting plate 654 is fixed to the driving nut 61. A through hole for the screw 3 to pass through is provided on the cover plate 652.

[0034] The material of the lubricating block 653 is sponge or felt, preferably sponge. It includes a contact part 6531 in contact with the screw 3 for lubrication and an absorption part 6532 extending into the oil cavity for absorbing the lubricating oil 655. In this embodiment, the contact part 6531 and the absorption part 6532 are perpendicularly arranged. The absorption part 6532 is used to extend downward into the oil cavity to absorb the lubricating oil 655 and transfer it to the contact part 6531, and the lubricating oil 655 in the contact part 6531 is transferred to the screw 3 to achieve the lubricating effect.

[0035] The oil box 651 includes an inner ring part 6511, an outer ring part 6512, a bottom plate 6513 connecting the bottoms of the inner ring part 6511 and the outer ring part 6512, and mounting ears 6514 for installing the oil box 651 and the cover plate 652. An oil cavity is formed between the inner ring part 6511, the outer ring part 6512, and the bottom plate 6513. And the height of the inner ring part 6511 is less than the height of the outer ring part 6512; the inner diameter of the inner ring part 6511 is greater than the outer diameter of the screw 3.

[0036] The contact part 6531 is accommodated between the top of the inner ring part 6511 and the cover plate 652, and the absorption part 6532 extends from the contact part 6531 towards the bottom plate 6513. The inner ring part 6511 can support the lubricating block 653.

[0037] In the lubrication mechanism 65 of this embodiment, the oil box 651 and the lubrication block 653 adopt a 360° circular ring structure, which can enclose the screw rod 3. The cover plate 652 of the oil box 651 presses the lubrication block 653, and the lubrication block 653 lubricates the screw rod 3 by absorbing the lubricating oil 655, so as to achieve 360° fully enclosed lubrication, self-recovery of oil splashing, reduction of oil consumption, reduction of oil stains, and improvement of lubrication effect.

[0038] As Figure 5 and 6 shown, the emergency mechanism 10 in this embodiment includes an emergency motor 101 and a sleeve 102 connected to the bottom of the screw rod 3. The emergency motor 101 is used to drive the sleeve 102 to rotate. In the event of an emergency where the drive mechanism 6 fails, the emergency motor 101 can be started to drive the sleeve 102 to rotate, and then drive the screw rod 3 to rotate to realize the movement of the car frame 4. A cylindrical pin can be used to fix between the sleeve 102 and the screw rod 3.

[0039] As Figure 4 、 7 -10 shown, the elevator guiding assembly in this embodiment includes a mutually cooperating guide rail 5 and a guide shoe 41. The guide shoe 41 is fixedly installed at the upper and lower ends on both sides of the car frame 4. The guide rail 5 includes a connecting portion 52 and a guiding portion 51. The connecting portion 52 is connected between the guiding portion 51 and the hoistway wall 14; the guide shoe 41 has a guiding groove 414 for accommodating the guiding portion 51. The hoistway wall 14 can be formed of aluminum alloy and is integrally formed with the guide rail 5, with a compact structure and optimized space utilization.

[0040] The width of the guiding portion 51 gradually decreases from the side close to the car frame 4 to the side far from the car frame 4. In this embodiment, the cross-section of the guiding portion 51 is set to be a (quasi-) trapezoidal or triangular structure, that is, the width of the guiding portion 51 gradually increases from the side of the hoistway wall 14 to the side of the car frame 4. By changing the width of the guiding portion 51, the guiding portion 51 has multiple guiding surfaces, and at the same time the guide shoe 41 matches the guiding portion 51, improving the guiding stability of the guiding assembly.

[0041] As Figures 9-10 shown, specifically, the guiding portion 51 in this embodiment has a first guiding wall 511, a second guiding wall 512 and a third guiding wall 513. The second guiding wall 512 and the third guiding wall 513 are symmetrically arranged on both sides of the first guiding wall 511. The second guiding wall 512 and the third guiding wall 513 are connected between the first guiding wall 511 and the connecting portion 52, and the distance between the second guiding wall 512 and the third guiding wall 513 gradually decreases from the side close to the first guiding wall 511 to the side close to the connecting portion 52. That is, by changing the structural width of the guiding portion, at least three guiding walls (surfaces) are realized for the guiding portion 51, thereby improving the guiding effect, realizing the guiding function of the elevator operation, and effectively calibrating the elevator operation center.

[0042] The first guiding wall 511 is perpendicular to the vertical plane formed by the two side guide rails 5. The included angles between the second guiding wall 512 and the third guiding wall 513 and the first guiding wall 511 are 80°, which further improves the guiding effect and can prevent the guide shoe 41 from falling off the guide rail 5.

[0043] Corresponding to the guiding portion 51 of the guide rail 5, the guide shoe 41 includes a first working portion 411, a second working portion 412, and a third working portion 413 that respectively cooperate with the first guiding wall 511, the second guiding wall 512, and the third guiding wall 513. A guiding groove 414 is formed between the first working portion 411, the second working portion 412, and the third working portion 413. The distance between the second working portion and the third working portion gradually decreases from the end close to the first working portion to the end close to the guide rail connection portion.

[0044] To further improve the guiding effect, a guiding wheel is provided in the guiding groove 414. The outer surface of the guiding wheel is used to contact and guide the surface of one of the guide shoe 41 or the guiding portion 51. That is, a guiding wheel is provided on one of the guide shoe 41 and the guiding portion 51, and the outer surface of the guiding wheel is used to contact and guide the surface of the remaining one of the guide shoe 41 and the guiding portion 51. By providing the guiding wheel, the gap between the guide rail and the guide shoe can be further reduced, and the running stability can be improved.

[0045] As Figure 10 shown, in this embodiment, the guiding wheel is rotatably arranged on the guide shoe 41, and the outer surface of the guiding wheel is used to contact and guide the guiding portion 51. The guiding wheel includes a first roller 121, a second roller 122, and a third roller 123 that are respectively fixed on the first working portion 411, the second working portion 412, and the third working portion 413. The second roller 122 and the third roller 123 are located in the same horizontal plane. The guiding portion 51 is received in the guiding groove 414, and the guiding wall, the working portion, and the roller correspond one by one.

[0046] As Figure 8 shown, in this embodiment, guide shoes 41 are provided both above and below one side of the car frame 4, and two second rollers 122 and third rollers 123 are provided on the same guide shoe 41. The horizontal plane where the first roller 121 is located is at the middle position between the two second rollers 122 or third rollers 123. This further improves the centering effect of the guide shoe 41 and the guiding property during operation.

[0047] The elevator guiding assembly of this embodiment is composed of a three-sided guiding guide rail 5 and a matching angle roller guide shoe 41. The angle roller guide shoe 41 is installed at the upper and lower ends of the elevator car frame 4 to form a symmetric self-calibrating guiding, ensuring the up and down operation of the elevator in the hoistway, so that the self-calibration of the elevator operation can be realized, and it has good running smoothness.

[0048] As Figures 2-4As shown, the first shock-absorbing mechanism 8 includes a first gasket 81, a second gasket 82, and a first shock absorber 84 located between the first gasket 81 and the second gasket 82. The first gasket 81 and the second gasket 82 are fixed on the fixed seat 7. Through holes 11 are provided on the first gasket 81, the first shock absorber 84, and the second gasket 82. The top of the screw 3 sequentially passes through the first gasket 81, the first shock absorber 84, and the second gasket 82 and is provided with a limiting mechanism 13. The limiting mechanism 13 prevents the screw 3 from moving up and down, and the limiting mechanism 13 is located above the second gasket 82. At the same time, a third gasket 83 is also provided between the bottom of the fixed seat 7 and the screw 3.

[0049] As Figure 6 shown, the second shock-absorbing mechanism is arranged between the fixed plate 66 and the car frame 4. Specifically, a connecting member 91 is provided between the fixed plate 66 and the car frame 4. One side of the connecting member 91 is connected to the fixed plate 66, and the other side of the connecting member 91 is connected to the car frame 4. A second shock absorber 92 is provided between the connecting member 91 and the fixed plate 66. That is, the second shock-absorbing mechanism 9 includes the connecting member 91 and the second shock absorber 92, effectively realizing shock absorption between the driving mechanism 6 and the car. The first shock absorber 84 and the second shock absorber 92 can be selected as rubber pads.

[0050] For the screw-driven elevator of the present invention, by arranging a first shock-absorbing mechanism at the top of the screw and a second shock-absorbing mechanism between the driving mechanism and the car frame, effective shock absorption of the car is realized, and the riding comfort is improved.

[0051] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A screw-driven elevator, comprising a guide rail, a screw, a car frame, and a driving mechanism for driving the car frame to move up and down along the screw, characterized in that, A fixed seat is fixed to the top of the guide rail. The top of the screw is fixed on the fixed seat. A first shock-absorbing mechanism is arranged between the top of the screw and the fixed seat. A second shock-absorbing mechanism is arranged between the driving mechanism and the car frame. The first shock-absorbing mechanism includes a first gasket, a second gasket, and a first shock absorber located between the first gasket and the second gasket. The first gasket and the second gasket are fixed on the fixed seat. The top of the screw sequentially penetrates through the first gasket, the first shock absorber, and the second gasket. The second shock-absorbing mechanism includes a connecting member and a second shock absorber. The driving mechanism is fixed on a fixing plate. The connecting member is arranged between the fixing plate and the car frame. One side of the connecting member is connected to the fixing plate, and the other side of the connecting member is connected to the car frame. The second shock absorber is arranged between the connecting member and the fixing plate and / or between the connecting member and the car frame.

2. The screw-driven elevator according to claim 1, wherein, The first shock absorber and / or the second shock absorber is a rubber pad or an elastic member.

3. The screw-driven elevator according to claim 1, wherein, An emergency mechanism is included. The emergency mechanism includes an emergency motor and a sleeve connected to the bottom of the screw. The emergency motor is used to drive the sleeve to rotate.

4. The screw-driven elevator according to claim 1, characterized in that, The guiding portion of the guide rail is trapezoidally arranged, and the width of the side close to the car frame is greater than the width of the side far from the car frame. The car frame is provided with a guide shoe matching the guiding portion.

5. The screw-driven elevator according to claim 4, characterized in that, The guide rail is integrally formed with the hoistway wall.

6. The screw-driven elevator according to claim 1, characterized in that, The driving mechanism includes a nut sleeved outside the screw and a driving motor for driving the nut to rotate.

7. The screw-driven elevator according to claim 6, wherein The driving motor and / or the nut is covered with an outer cover.

8. The screw-driven elevator according to claim 6, wherein The driving mechanism further includes a lubricating mechanism for reducing the frictional force between the nut and the screw.

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