TW201348116A - Screw rod raising and descending structure - Google Patents

Abstract

A screw rod raising and descending structure comprises a first guide rail and a second guide rail. The first screw rod nut set has a first screw rod and a first screw nut. A top of the first screw rod is fixedly connected with a fastening base. The first screw nut moves along the first screw rod. The power device is disposed at a first lifting and descending table. The power device has a first driving portion and a second driving portion. The first driving portion is fixedly connected to the first screw nut. The second screw rod nut set has a second screw rod and a second screw nut. A top of the second screw rod is fixedly connected to the second driving portion. The second screw nut moves along the second screw rod. The moving body is fixedly connected to the second screw nut to move in accordance with the second screw nut. Accordingly, by controlling single power device, the moving body is driven to move. Its manufacturing expenses and control costs are lower than conventional technique.

Description

Screw lifting structure

The invention relates to a lifting structure, in particular to a screw lifting structure.

According to the aging of the population and the increasing concentration of the urban population, the demand for the use of lifting structures is increasing. The traditional lifting structure adopts a cable pulley structure to drive the car to move up and down to transport people or goods to various floors of the building. However, although the conventional cable-type lifting structure has the advantages of low cost and mature production technology, there is a safety concern - the cable breakage problem, although the industry is constantly researching and improving the safety of the cable-type lifting structure. However, in the news, there is still a problem of falling cars caused by broken steel cables. In addition, the cable lifting structure also has problems that require frequent inspection and maintenance.

In this regard, there has been a lifting structure for driving the screw nut group. Since the nut in the screw nut group is sleeved on the screw and there is no problem of pulling out the screw, this type of lifting structure can be prevented from being broken due to the cable. The car fell from the problem. However, because the length of the screw is limited in manufacturing, and the excessively long screw also causes a lot of stress concentration in the material strength, there is a new patent creation of the Republic of China No. 543649 to overcome the above problems, but the aforementioned patents are used. The production cost of the two sets of power sources is still high, and the control cost of the two sets of power sources must be controlled at the same time. Furthermore, the transmission mechanism is disposed on the side of the mechanism, which tends to cause the carriage to shift and the operation is unstable.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a screw lifting structure capable of driving a lifting structure car using a single set of power sources and controlling only a single power source, which is less expensive to control than conventional techniques.

A second object of the present invention is to provide a screw lifting structure which reduces the movement deflection of the vehicle and which is smoother in operation than the prior art.

In order to achieve the foregoing objective, a screw lifting structure according to the present invention includes a first rail and a second rail which are erected in parallel with each other on a fixing surface; a fixing base is fixed to the fixing a first guide rail; a first screw nut group having a first screw and a first nut, the first screw end is fixed to the fixing seat, and the first nut is sleeved on the first a first screw is moved up and down along the first screw when the first nut and the first screw are relatively rotated; a lifting platform has a first rail groove at opposite ends thereof a second rail slot, the first rail slot receives the first rail, the second rail slot receives the second rail, restricting the lifting platform to move up and down along the first rail and the second rail; a power unit is disposed on the lifting platform, the power unit has a first driving portion and a second driving portion, the first driving portion is fixed to the first nut to drive the first nut to rotate; a second screw nut set having a second screw and a second nut The second screw end is fixed to the second driving portion, and is driven to rotate by the second driving portion. The second nut is sleeved on the second screw when the second screw and the second nut rotate relative to each other. The second nut moves up and down along the second screw; and a moving body is disposed between the first rail and the second rail, and the movable body has two sides respectively a third rail slot and a fourth rail slot, the third rail slot receiving the first rail, the fourth rail slot receiving the second rail, limiting the moving body along the first rail and the first The two rails move up and down, and the moving body fixes the second nut to move along with the second nut.

Thereby, the first driving unit and the second driving unit can be used to control the moving device to move up and down, and the cost is lower than that of the prior art, and only a single power device is controlled. Known technology control costs are low.

In addition, the power unit has a reducer and a motor, and the speed reducer is disposed on the lift platform and has the first drive portion and the second drive portion. The motor is disposed on the reducer and is driven. The first driving portion and the second driving portion are disposed at an intermediate position between the first rail and the second rail.

Thereby, the screw lifting structure of the present invention drives the moving body to move up and down in the middle position of the moving body, and if the moving body is disposed on the moving body, the movement of the moving body is reduced and the running is stable.

In order to explain in detail the technical features of the present invention, one of the following preferred embodiments will be described with reference to the following drawings, wherein: as shown in the first to third embodiments, a preferred embodiment of the present invention provides The screw lifting structure is disposed on a fixing surface 80. The screw lifting structure comprises: a first guiding rail 11 , a second guiding rail 12 , a fixing seat 13 , a first screw nut group 14 , a lifting platform 15 , a power unit 16, a first A two-screw nut set 17 and a moving body 18.

The first rail 11 and the second rail 12 are erected on the fixing surface 80 in parallel with each other.

The fixing seat 13 is fixed to the fixing surface 80 or the first rail 11 . In the preferred embodiment, the fixing rail 13 is fixed to the first rail 11 as an example. It should be noted that the fixing seat 13 is used to fix the foundation of the object, whether it is directly or indirectly fixed to the fixing surface 80 or the first rail 11 , or even the fixing surface 80 or the first rail 11 One-piece molding can be implemented.

The first screw nut group 14 has a first screw 141 and a first nut 142. The top end of the first screw 141 is fixed to the fixing seat 13. The first nut 142 is sleeved on the first screw. 141. When the first nut 142 and the first screw 141 rotate relative to each other, the first nut 142 moves up and down along the first screw 141. It is worth mentioning that the first screw nut group 14 can also be a ball screw nut group or a roller screw nut group.

The lifting platform 15 has a first rail slot 151 and a second rail slot 152 at opposite ends thereof. The first rail slot 151 receives the first rail 11 and the second rail slot 152 receives the second rail. The guide rail 12 restricts the lifting table 15 from moving up and down along the first rail 11 and the second rail 12.

The power unit 16 is disposed on the lifting platform 15 . The power unit 16 has a first driving portion 161 and a second driving portion 162 . The first driving portion 161 fastens the first nut 142 to drive the power unit 16 . The first nut 142 rotates. In the preferred embodiment, the power unit 16 has a speed reducer 163 and a motor 164. The speed reducer 163 is disposed on the lifting platform 15 and has The first driving unit 161 and the second driving unit 162 are provided in the speed reducer 163 to drive the first driving unit 161 and the second driving unit 162.

The second screw nut group 17 has a second screw 171 and a second nut 172. The second screw 171 is fixed to the second driving portion 162, and is driven to rotate by the second driving portion 162. The second nut 172 is sleeved on the second screw 171. When the second screw 171 and the second nut 172 are relatively rotated, the second nut 172 moves up and down along the second screw 171.

The moving body 18 can be disposed on the vehicle or other mounting object, and is disposed between the first rail 11 and the second rail 12, and has a third rail slot 181 on each side of the moving body 18 and a fourth rail slot 182, the third rail slot 181 is configured to receive the first rail 11 , the fourth rail slot 182 is configured to receive the second rail 12 , and the movable body 18 is constrained along the first rail 11 and the The second rail 132 moves up and down, and the moving body 18 is fixed to the second nut 172 to move along with the second nut 172.

Thereby, the first driving unit 161 and the second driving unit 162 can be used to control the moving device 18 to move up and down, and the cost is lower than that of the prior art, and only a single power unit 16 is controlled. It is also cheaper to control than conventional technology.

The above is a description of the preferred embodiment. In addition, in order to reduce the deflection of the vehicle in the prior art, the preferred embodiment places the reducer 163 in the middle between the first rail 11 and the second rail 12. Position setting, which can reduce the movement of the car and stabilize the operation

Next, the description of the use of the preferred embodiment will be described.

If the moving body 18 is moved up and down along the first rail 11 and the second rail 12 respectively, the motor 164 in the power unit 16 is activated, and the speed reducer 163 is driven via the motor 164 to make the first The driving portion 161 and the second driving portion 162 respectively drive the first nut 142 and the second screw 171 to rotate.

Because the second screw 171 rotates, the second nut 172 sleeved on the second screw 171 moves along the second screw 171, and the moving body 18 of the second nut 172 is fixed. The second nut 172 moves. At the same time, the first nut 142 moves up and down along the first screw 141 by rotation, and also drives the lifting platform 15 to move along the first rail 11 and the second rail 12 respectively.

In addition to the above, it is particularly mentioned that both the first screw nut group 14 and the second screw nut group 17 have their lead. In the preferred embodiment, the first screw nut The lead of the set 14 and the second screw nut set 17 are the same, and the first nut 142 and the second screw 171 rotate at the same speed. As a result, the moving distance of the lifting platform 15 relative to the first screw 141 is equal to the moving distance of the moving body 18 relative to the second screw 171. Of course, the lead of the first screw nut group 14 can be designed to be larger than the lead of the second screw nut group 17, and the rotation speed of the first nut 142 must be smaller than the rotation speed of the second screw 171. Alternatively, the lead of the first ball screw 14 group is smaller than the lead of the second screw nut group 17, and the rotation speed of the first nut 142 is greater than the rotation speed of the second screw 171.

11‧‧‧First rail

12‧‧‧Second rail

13‧‧‧ Fixed seat

14‧‧‧First screw nut group

141‧‧‧First screw

142‧‧‧ first nut

15‧‧‧ Lifting table

151‧‧‧First rail slot

152‧‧‧Second rail slot

16‧‧‧Powerplant

161‧‧‧First Drive Department

162‧‧‧Second drive department

163‧‧‧Reducer

164‧‧ ‧motor

17‧‧‧Second screw nut set

171‧‧‧Second screw

172‧‧‧second nut

18‧‧‧Mobile

181‧‧‧3rd rail slot

182‧‧‧4th rail slot

80‧‧‧fixed surface

The first drawing is a perspective view of a preferred embodiment of the present invention; the second drawing is a partially enlarged view of a preferred embodiment of the present invention, showing a lifting platform and a power unit; and the third drawing is a partially enlarged view of a preferred embodiment of the present invention. The fourth embodiment is a schematic view of the preferred embodiment of the present invention, and the moving body is moved upward; the fifth drawing is a schematic diagram of the preferred embodiment of the present invention, and the moving body is moved upward; A schematic diagram of the use of the embodiment, the moving body moves downward; and a seventh diagram is a schematic diagram of the use of the preferred embodiment of the present invention, the moving body moves downward.

11‧‧‧First rail

12‧‧‧Second rail

13‧‧‧ Fixed seat

14‧‧‧First screw nut group

141‧‧‧First screw

142‧‧‧ first nut

15‧‧‧ Lifting table

16‧‧‧Powerplant

161‧‧‧First Drive Department

162‧‧‧Second drive department

163‧‧‧Reducer

164‧‧ ‧motor

17‧‧‧Second screw nut set

171‧‧‧Second screw

172‧‧‧second nut

18‧‧‧Mobile

80‧‧‧fixed surface

Claims (9)

A screw lifting structure comprising: a first guiding rail and a second guiding rail, which are erected in parallel with each other on a fixing surface; a fixing seat fixed to the fixing surface or the first guiding rail; a first screw snail a cap group having a first screw and a first nut, the first screw end is fixed to the fixing seat, the first nut is sleeved on the first screw, the first nut and the first When the screw is relatively rotated, the first nut moves up and down along the first screw; and an lifting platform has a first rail slot and a second rail slot at opposite ends thereof, the first rail slot Accommodating the first rail, the second rail slot receiving the second rail, restricting the lifting platform from moving up and down along the first rail and the second rail; a power device is disposed on the lifting platform, The power device has a first driving portion and a second driving portion, the first driving portion fastens the first nut to drive the first nut to rotate; and a second screw nut group has a second screw And a second nut, the second screw tip is fixed to the second driving portion, and is subjected to the first The driving portion drives the rotation, and the second nut is sleeved on the second screw. When the second screw and the second nut rotate relative to each other, the second nut moves up and down along the second screw. And a moving body is disposed between the first rail and the second rail, and has a third rail slot and a fourth rail slot on each side of the moving body, the third rail slot is configured to receive the first a guide rail, the fourth rail slot is configured to receive the first The two guide rails restrict the moving body from moving up and down along the first rail and the second rail respectively, and the moving body fixes the second nut to move along with the second nut. The screw lifting structure of claim 1, wherein the fixing seat is fixed to the first rail. The screw lifting structure according to claim 1, wherein the first screw nut group or the second screw nut group is a ball screw nut group. The screw lifting structure of claim 1, wherein the first screw nut group or the second screw nut group is a roller screw nut group. The screw lifting structure according to claim 1, wherein the power unit has a speed reducer and a motor, and the speed reducer is disposed on the lifting platform and has the first driving portion and the second driving portion. The motor is disposed in the reducer to drive the first drive unit and the second drive unit. The screw lifting structure according to claim 1, wherein the speed reducer is disposed at an intermediate position between the first rail and the second rail. The screw lifting structure of claim 1, wherein the first screw nut group and the second screw nut group have the same lead, and the first nut and the second screw rotate at the same speed. The screw lifting structure of claim 1, wherein: the lead of the first screw nut group is larger than the lead of the second screw nut group, and the rotation speed of the first nut is smaller than the second screw Rotating speed. The screw lifting structure of claim 1, wherein: the lead of the first screw nut group is smaller than the lead of the second screw nut group, and the rotation speed of the first nut is greater than the second screw Rotating speed.