CN111704006B - A vertical lifting rolling screw device for up and down movement - Google Patents
A vertical lifting rolling screw device for up and down movement Download PDFInfo
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- CN111704006B CN111704006B CN202010673852.2A CN202010673852A CN111704006B CN 111704006 B CN111704006 B CN 111704006B CN 202010673852 A CN202010673852 A CN 202010673852A CN 111704006 B CN111704006 B CN 111704006B
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- lead screw
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- 238000005096 rolling process Methods 0.000 title claims abstract description 16
- 230000008878 coupling Effects 0.000 claims abstract 3
- 238000010168 coupling process Methods 0.000 claims abstract 3
- 238000005859 coupling reaction Methods 0.000 claims abstract 3
- 230000001681 protective effect Effects 0.000 claims description 12
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
- B66B11/0446—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation with screw-nut or worm-screw gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/02—Kinds or types of lifts in, or associated with, buildings or other structures actuated mechanically otherwise than by rope or cable
- B66B9/025—Kinds or types of lifts in, or associated with, buildings or other structures actuated mechanically otherwise than by rope or cable by screw-nut drives
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Automation & Control Theory (AREA)
- Civil Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Transmission Devices (AREA)
Abstract
本发明公开了一种应用于上下运行的垂直提升滚动螺杆装置，包括垂直丝杠1和驱动大螺母2；垂直丝杠1表面加工有矩形螺纹11；驱动大螺母2上沿相应于垂直丝杠表面矩形螺纹的螺旋线21上均布有安装孔22，每个安装孔22内装配有滚柱螺杆单元23，滚柱螺杆单元23包括中心轴231，中心轴231内端固定装配有滚柱轴承232、其外端过盈配合穿过安装孔22后旋拧有锁紧小螺母233；驱动大螺母2旋拧于垂直丝杠1上，垂直丝杠1上套装有盘式中空力矩电机3，输出轴一端通过联轴器与驱动大螺母2固定连接。本发明对垂直升降电梯的螺杆驱动方式进行了改进，降低了能源消耗，简化了驱动结构，节约了制造和运行成本。
The present invention discloses a vertical lifting rolling screw device for up and down operation, comprising a vertical lead screw 1 and a driving large nut 2; the vertical lead screw 1 is processed with a rectangular thread 11; the driving large nut 2 is evenly distributed with mounting holes 22 on the spiral line 21 corresponding to the rectangular thread on the vertical lead screw surface, each mounting hole 22 is equipped with a roller screw unit 23, and the roller screw unit 23 comprises a central shaft 231, the inner end of the central shaft 231 is fixedly equipped with a roller bearing 232, and the outer end thereof is screwed with a locking small nut 233 after passing through the mounting hole 22 through interference fit; the driving large nut 2 is screwed on the vertical lead screw 1, and a disc-type hollow torque motor 3 is mounted on the vertical lead screw 1, and one end of the output shaft is fixedly connected to the driving large nut 2 through a coupling. The present invention improves the screw driving mode of the vertical lifting elevator, reduces energy consumption, simplifies the driving structure, and saves manufacturing and operating costs.
Description
Technical Field
The invention relates to the field of vertical lifting equipment, in particular to a vertical lifting rolling screw device applied to up-and-down operation.
Background
An elevator refers to a permanent transport device serving a number of specific floors within a building with its car running in at least two columns of rigid rails running perpendicular to the horizontal or inclined at an angle of less than 15 ° to the plumb line.
The driving modes of the elevator mainly comprise the following steps:
1. An AC elevator, which uses an AC induction motor as driving force. The traction mode can be divided into alternating current single speed, alternating current double speed, alternating current voltage and speed regulation, alternating current voltage transformation variable frequency speed regulation and the like, and the traction is performed through a steel wire rope.
2. A DC elevator, which uses a DC motor as driving force. The rated speed of such elevators is typically above 2.00 m/s.
3. In general, a hydraulic elevator is an elevator in which a liquid is driven by an electric pump to flow and a car is lifted by a plunger.
4. The gear rack elevator processes the guide rail into a rack, the elevator car is provided with a gear meshed with the rack, and the motor drives the gear to rotate so as to enable the elevator car to ascend and descend.
5. The screw elevator is characterized in that a plunger of the straight-top elevator is processed into rectangular threads, a large nut with a thrust bearing is arranged on the top of an oil cylinder, and then the nut is driven to rotate through a motor via a speed reducer (or a belt), so that the screw can lift the elevator in a lifting or descending mode.
6. The power source of the elevator driven by the linear motor is the linear motor.
For screw type elevators, as shown in fig. 5, the driving part mainly comprises a fixed vertical screw 501, a conventional driving large nut is arranged on the vertical screw 501, the driving large nut is assembled on a platform longitudinal assembly 502, and an alternating current motor is assembled on the platform longitudinal assembly 502 to drive the large nut to rotate through a transmission mechanism. The platform transverse assembly 503 is assembled on the platform longitudinal assembly 502, the car is mounted on the platform transverse assembly 503, the driving large nut provides axial load, and the up-and-down running of the car is realized through the motor.
Compared with the common alternating current elevator pulled by the steel wire rope, the screw elevator runs very stably and accurately, and the phenomenon of shaking does not exist when the elevator reaches a specified floor. But the screw elevator consumes large energy during operation, has a complex structure and is high in cost.
Disclosure of Invention
Aiming at the problems of complex structure, high energy consumption and the like of the existing screw type elevator, the invention aims to provide a vertical lifting rolling screw device applied to up-down running, which is applied to a driving part of the screw type elevator.
The invention is realized by adopting the following technical scheme:
A vertical lifting rolling screw device applied to up-and-down operation comprises a vertical screw rod and a driving large nut.
Rectangular threads are machined on the surface of the vertical screw rod.
The driving large nut is uniformly provided with mounting holes along a spiral line corresponding to rectangular threads on the surface of the vertical screw rod, each mounting hole is internally provided with a roller screw unit, the roller screw unit comprises a central shaft, the inner end of the central shaft is fixedly provided with a roller bearing, and the outer end of the central shaft is in interference fit and penetrates through the mounting holes to be screwed with the small locking nut.
The driving large nut is screwed on the vertical screw rod, namely, the roller bearing of each roller screw rod unit on the driving large nut is correspondingly positioned in the rectangular thread of the vertical screw rod.
The vertical screw rod is sleeved with a disc type hollow torque motor, and one end of an output shaft of the disc type hollow torque motor is fixedly connected with a driving large nut through a coupler.
Further preferably, the vertical screw rod is screwed with a protective nut, the other end of the output shaft of the disc type hollow torque motor is fixedly connected with the protective nut through a coupler, and a clearance fit is formed between threads of the protective nut and rectangular threads of the vertical screw rod.
When the lifting platform works, the disc type hollow torque motor is started to lift or descend, the driving large nut rotates along the vertical screw rod to lift or descend, rolling friction is formed between the driving large nut and the vertical screw rod, resistance caused by traditional sliding friction is greatly reduced, the driving large nut also has large axial load force, and the driving large nut is used as an axial driving component for lifting or descending of the lifting platform. In the process, the disc type hollow torque motor drives the protection nut at the other end to ascend or descend in a follow-up rotation way, the protection nut is a common traditional nut with rectangular convex threads, and because the threads of the protection nut and the rectangular threads of the vertical screw rod are in clearance fit, namely the threads of the protection nut are not in direct contact with the rectangular threads of the vertical screw rod in the ascending or descending process, only the follow-up lifting or descending process is carried out, the output torque of the disc type hollow torque motor is not consumed, only in abnormal emergency situations, if a plurality of roller screw units for driving the large nut are broken, and when the large nut is driven to lose axial force, the protection nut can be in close contact with the vertical screw rod at the moment, the axial supporting force is provided again, and the condition that a lifting platform falls rapidly is prevented.
The invention has the following advantages:
1. The 'convex thread' in the driving large nut is formed by a roller bearing, the nut and the screw rod are matched to be changed into rolling friction from traditional sliding friction, the running resistance of the nut on the screw rod is greatly reduced, the output power of a driving motor is reduced, and the energy conservation and emission reduction are realized.
2. The disc type hollow torque motor is adopted to replace the traditional motor, and has the advantages that the disc type hollow torque motor can be directly hoisted below the driving large nut and sleeved on the vertical screw rod, so that the assembly space is greatly saved, the device structure is simplified, the manufacturing cost is reduced, and the motor does not need to act on the driving large nut to operate by using a transmission mechanism, so that the transmission efficiency is improved.
The invention has reasonable design, improves the screw driving mode of the vertical lift elevator, reduces energy consumption, simplifies the driving structure, saves manufacturing and running cost and has good practical application value.
Drawings
Fig. 1 shows an overall schematic view of a vertical lift rolling screw device.
Fig. 2 shows a schematic view of the cooperation of a vertical screw and a driving large nut.
Fig. 3 shows a schematic view of the structure of the roller screw unit enlarged at section a in fig. 2.
Fig. 4 shows an external schematic view of the drive large nut.
Fig. 5 is a schematic diagram showing a driving method of a conventional screw elevator.
In the figure, a vertical screw rod, a 11-rectangular screw thread, a 2-driving large nut, a 21-spiral line, a 22-mounting hole, a 23-roller screw unit, a 231-central shaft, a 232-roller bearing, a 233-locking small nut, a 3-disk type hollow torque motor, a 4-protection nut, a 501-screw rod, a 502-platform longitudinal assembly and a 503-platform transverse assembly are arranged.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
A vertical lifting rolling screw device applied to up-and-down operation is shown in fig. 1, and comprises a vertical screw 1, wherein a driving large nut 2, a disk type hollow torque motor 3 and a protection nut 4 are assembled on the vertical screw 1.
As shown in fig. 2, rectangular threads 11 are machined on the surface of the vertical screw rod 1, namely, the thread teeth are square or rectangular, and the thickness and the pitch of the thread teeth are determined according to actual requirements.
As shown in fig. 4, the driving large nut 2 is uniformly provided with mounting holes 22 along a spiral line 21 corresponding to a rectangular thread on the surface of the vertical screw rod, each mounting hole 22 is internally provided with a roller screw unit 23, as shown in fig. 3, the roller screw unit 23 comprises a central shaft 231, the inner end of the central shaft 231 is fixedly provided with a roller bearing 232, the outer end of the central shaft 231 is in interference fit through the mounting hole 22 and then is screwed with a small locking nut 233, and the small locking nut 233 further has the function of firmly assembling the roller bearing 232. In practical application, the outer surface of the driving large nut 2 is provided with an embedded groove in each mounting hole 22, and the locking small nut 233 can be embedded in the embedded groove on the surface of the driving large nut 2, so that the appearance of the driving large nut is tidy.
Wherein all roller bearings 232 on the inner surface of the drive large nut 2 are closely aligned, constituting a "male thread" of the drive large nut 2. The roller bearing 232 can bear great radial load, and the journal rotates to make circumferential contact with a plurality of rollers usually arranged on the positioning ring, so that the roller bearing can achieve good precision and rigidity through pretensioning, and according to the use occasions, the bearing without an inner ring or the roller (needle roller) and a retainer assembly can be selected, the journal surface matched with the bearing and the shell hole surface are directly used as the inner rolling surface and the outer rolling surface of the bearing, and the hardness, the machining precision and the surface quality of the surface of the shaft or the shell Kong Gundao are similar to those of a raceway of a bearing ring in order to ensure the load capacity and the running performance to be the same as those of the bearing ring.
As shown in fig. 2, the drive large nut 2 is screwed onto the vertical screw 1, i.e. the roller bearings 232 of each roller screw unit 23 on the drive large nut 2 are located correspondingly within the rectangular threads 11 of the vertical screw 1.
As shown in fig. 1, a disc type hollow torque motor 3 is sleeved on a vertical screw rod 1, one end of a (hollow) output shaft of the disc type hollow torque motor 3 is fixedly connected with a driving large nut 2 through a coupler, a traditional protection nut 4 is screwed on the vertical screw rod 1, the other end of the (hollow) output shaft of the disc type hollow torque motor 3 is fixedly connected with the protection nut 4 through the coupler, and a clearance fit is formed between threads of the protection nut 4 and rectangular threads 11 of the vertical screw rod 1, for example, the clearance distance between the threads of the protection nut 4 and the rectangular threads 11 of the vertical screw rod 1 is 2-5 mm.
Further, the disk hollow torque motor 3 may be installed below or above the driving large nut 2.
The invention is used as vertical lifting equipment and has the working principle that the output shaft of the disc type hollow torque motor 3 outputs power not by constant power but by constant torque, so that stable torque can be provided for a load. When lifting or lowering is needed, the disc hollow torque motor 3 is started to rotate and lift or lower the driving large nut 2, and the roller bearings 232 can bear large radial load, and the plurality of roller bearings 232 form rectangular convex threads of the driving large nut 2, so that the driving large nut 2 can easily lift or lower along the vertical screw 1 due to rolling friction between the roller bearings 232 and the rectangular threads 11 of the vertical screw 1, and compared with the common driving large nut under the condition of the same vertical load, the disc hollow torque motor 3 can output small torque to lift or lower the driving large nut, and the roller bearings 232 can bear large radial load, so that the driving large nut 2 has large axial load force, and the driving large nut 2 is used as an axial driving part for lifting or lowering an axial lifting platform. In the process, the disc type hollow torque motor 3 drives the protection nut 4 at the other end to ascend or descend in a follow-up rotation way, the protection nut 4 is a common nut with rectangular threads, and since the threads of the protection nut 4 and the rectangular threads 11 of the vertical screw rod 1 are in clearance fit, namely the threads of the protection nut 4 do not contact with the rectangular threads 11 of the vertical screw rod 1 in the ascending or descending process, only follow-up lifting or descending is carried out, the output torque of the disc type hollow torque motor 3 is not consumed, a torque sensor is arranged between the other end of the output shaft of the disc type hollow torque motor 3 and the protection nut 4, if contact occurs between the threads of the protection nut 4 and the rectangular threads of the vertical screw rod 1 under normal conditions, the friction contact inevitably increases the output power (consumed torque) of the disc type hollow torque motor 3, and when the torque sensor is larger than a certain threshold value, the protection nut 4 is judged to work abnormally, and maintenance is needed. Only in abnormal emergency, if the roller screw units 23 driving the large nut 2 are broken, when the large nut 2 is driven to lose axial force, the protective nut 4 is directly and closely contacted with the vertical screw 1 after being lowered for 2-5 mm, and axial supporting force is provided again, so that the condition that the lifting platform falls rapidly is prevented.
In addition, the protection nut 4 is not necessarily assembled on the disc hollow torque motor 3, the protection nut 4 can be fixedly connected with the driving large nut 2, and the threads of the protection nut 4 and the rectangular threads 11 of the vertical screw rod 1 are in clearance fit, so that the protection nut 4 is driven by the driving large nut 2 to ascend or descend along with the driving large nut 2, but does not provide axial force, and only when the driving large nut 2 loses the axial force, the protection nut 4 can be contacted with the vertical screw rod 1 to provide the axial force.
When the elevator lifting device is applied, the elevator lifting device can be used as a driving mechanism of a vertical lifting elevator, an elevator car can stably move up and down by driving a large nut, and the extreme situation is prevented by protecting the nut.
It should be noted that modifications and applications can be made by those skilled in the art without departing from the principles of the invention, which are also considered as being within the scope of the invention.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010673852.2A CN111704006B (en) | 2020-07-14 | 2020-07-14 | A vertical lifting rolling screw device for up and down movement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010673852.2A CN111704006B (en) | 2020-07-14 | 2020-07-14 | A vertical lifting rolling screw device for up and down movement |
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| Publication Number | Publication Date |
|---|---|
| CN111704006A CN111704006A (en) | 2020-09-25 |
| CN111704006B true CN111704006B (en) | 2025-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010673852.2A Active CN111704006B (en) | 2020-07-14 | 2020-07-14 | A vertical lifting rolling screw device for up and down movement |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05288253A (en) * | 1992-02-10 | 1993-11-02 | Nippondenso Co Ltd | Feed screw device |
| CN203295111U (en) * | 2013-06-21 | 2013-11-20 | 南车戚墅堰机车有限公司 | Lead screw safety nut mechanism for lifting table |
| CN103629319A (en) * | 2013-12-11 | 2014-03-12 | 洪荣华 | Pin roller bearing nut and screw rod pair |
| CN212315269U (en) * | 2020-07-14 | 2021-01-08 | 山西风源机械制造有限公司 | Vertical lifting rolling screw device applied to up-down operation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3766788A (en) * | 1972-08-23 | 1973-10-23 | Norco Inc | Radial roller anti-friction transmission with eccentric bushings |
| US5644950A (en) * | 1995-11-17 | 1997-07-08 | Norco, Inc. | Heavy-duty mechanical oscillator |
| CN105293389A (en) * | 2015-11-24 | 2016-02-03 | 重庆红亿机械有限公司 | Car lifting jack with fall preventing function |
-
2020
- 2020-07-14 CN CN202010673852.2A patent/CN111704006B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05288253A (en) * | 1992-02-10 | 1993-11-02 | Nippondenso Co Ltd | Feed screw device |
| CN203295111U (en) * | 2013-06-21 | 2013-11-20 | 南车戚墅堰机车有限公司 | Lead screw safety nut mechanism for lifting table |
| CN103629319A (en) * | 2013-12-11 | 2014-03-12 | 洪荣华 | Pin roller bearing nut and screw rod pair |
| CN212315269U (en) * | 2020-07-14 | 2021-01-08 | 山西风源机械制造有限公司 | Vertical lifting rolling screw device applied to up-down operation |
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| Publication number | Publication date |
|---|---|
| CN111704006A (en) | 2020-09-25 |
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