TW201326582A - Combination of screw rod and nut with supporting base - Google Patents

Abstract

A combination of screw rod and nut with supporting base comprising a movable platform, a first screw rod and nut set wherein a fixing element is fixed at both ends of screw rod respectively with the first screw nut pivoted on the movable platform, a second screw rod and nut set comprising a second screw rod and a second screw nut with the second nut pivoted on the movable platform for being inserted with the second rod, a driving device which can drive the first and the second nuts at the same time. The second moving speed of the second rod to the second nut is twice as fast as the first moving speed of the first rod to the first nut and in the opposite direction. The first and the second supporting bases are fixed to the second screw rod, and move with the second screw rod. Thus, the gap between the supporting base and the movable platform can be changed according to the movement of screw nuts so as to reduce the distance beyond the movement of the movable platform.

Description

Screw nut combination with support

The invention relates to a screw nut combination, and in particular to a screw nut combination with a support base.

According to the machine generally using the screw nut group, the moving platform for the user to place the workpiece is fixed to the nut of the screw nut group, and the nut reciprocates along the screw. For the screw nut group with a long stroke, since the length of the screw is long, the deformation amount of the screw is also large when the nut moves on the screw, which is likely to cause excessive deformation of the screw. As a result, the critical speed of the screw will be limited, and the screw nut group is also prone to disturbing noise due to malfunction. In this regard, a support base has been added under the screw nut group to support the design of the screw to reduce the above limitation of the critical speed and the large amount of screw deformation. At present, the existing support seat is arranged. As shown in the first figure, the support base 1 and the nut 2 are connected by a connecting rod 3, so that the support base 1 moves with the nut 2 and the screw is supported, reducing The amount of deformation of the screw during operation, but because the distance between the support base 1 and the nut 2 is fixed, the movable stroke of the nut 2 will be blocked by the support base 1 to be reduced. As shown in the second figure, the support base 4 is driven by gas and hydraulic pressure. Although the support rod 4 can support the position of the screw, the support rod can be prevented from being moved by the support seat, and the support manner can be reduced. The production cost is high, and there are more restrictions on the cost of implementation.

The main object of the present invention is to provide a screw nut combination with a support base, which changes the spacing between the support base and the moving platform as the nut moves, reduces the travel of the mobile platform, and uses air and hydraulic pressure. The cost of driving the support is low.

In order to achieve the foregoing objective, a screw nut assembly with a support base according to the present invention includes: a moving platform; a first screw nut group having a first screw and a first nut The first screw is respectively fixed on a fixing member, the first nut is pivotally disposed on the moving platform, and is sleeved on the first screw to move along the first screw; a second screw a nut group having a second screw and a second nut, the second nut being pivoted on the moving platform, and the second screw is threaded and moved relative to the second nut; a driving device Driving the first nut and the second nut simultaneously; the first nut generates a first rate relative to the first screw when moving, and the second screw moves relative to the second nut when moving Generating a second rate that is greater than the second rate and is the same as the second rate of travel; and a first support base and a second support base are respectively secured to the second screw The second screw moves and supports the first screw.

Thereby, when the moving platform moves on the first screw, the second nut travels in the same direction as the first nut, reducing the stroke that the first nut cannot move, and the structure is driven by gas and hydraulic pressure. The method cost is low.

In order to explain the technical features of the present invention in detail, the following preferred embodiments are described below with reference to the accompanying drawings, wherein: as shown in the third to fourth embodiments, the first preferred embodiment of the present invention provides A screw nut combination with a support base mainly comprises: a mobile platform 11, a first screw nut group 12, a second screw nut group 13, a driving device 14, a first support base 15 and a Second support base 16.

The mobile platform 11 is used to provide goods to be carried, such as workpieces, goods, and the like.

The first screw nut group 12 has a first screw 121 and a first nut 122. The two ends of the first screw 121 are respectively fixed on a fixing member 20 to prevent the first screw 121 from rotating. The nut 122 is pivotally disposed on the moving platform 11 and is sleeved on the first screw 121 to move along the first screw 121 . In the preferred embodiment, each of the fixing members 20 prevents the first screw 121 from rotating, so that the first nut 122 can smoothly move along the first screw 121.

The second screw nut group 13 has a second screw 131 and a second nut 132. The second nut 132 is pivotally disposed on the moving platform 11 and is disposed through the second screw 131. The second nut 132 moves.

The driving device 14 drives the first nut 122 and the second nut 132 to move at the same time. The first nut 122 generates a first rate V1 relative to the first screw 121 when moving, and the second screw 131 generates a second rate V2 relative to the second nut 132 when moving, the first The rate V1 is greater than the second rate V2 rate and is opposite to the second rate V2.

The first support base 15 and the second support base 16 are respectively fixed to the second screw 131 to move along with the second screw 131 and support the first screw 121. It should be noted that, in the first preferred embodiment, the first support base 15 and the second support base 16 support the first screw 121 to avoid the first support base 15 and the second support base. Since the rotation of the 16 is restricted, the second screw 131 is restrained from rotating, so that the second nut 132 can surely move the second screw 131. In addition, it is worth mentioning that a linear moving component such as a linear slide rail or a pulley may be added under the first support base 15 or the second support base 16 to ensure that the first support base 15 or the second support base 16 operates stably.

The above is a description of the first preferred embodiment of the present invention, and the mode of operation of the first preferred embodiment will be described next. Please refer to the fifth to sixth figures. Taking the mobile platform 11 moving to the right as an example. The driving device 14 simultaneously drives the first nut 122 and the second nut 132 to rotate, so that the moving platform 11 moves toward the right end of the first screw 121 along with the first nut 122. At this time, the second screw 131 is oppositely moved toward the left end of the second nut 132 to reduce the distance between the second nut 132 and the first support base 15, thereby reducing the mobile platform. 11 A trip that cannot be moved due to being blocked by the first support base 15. Similarly, when the mobile platform 11 moves to the left, the driving device 14 simultaneously drives the first nut 122 and the second nut 132 to rotate, so that the moving platform 11 faces the first with the first nut 122. The left end of the screw 121 moves. At this time, the second screw 131 is oppositely moved toward the right end of the second nut 132, reducing the distance between the second nut 132 and the second support base 16, which will also reduce the movement of the mobile platform 11. The stroke to which the second support base 16 blocks and cannot move.

It is worth mentioning that the above operation mode is explained. To obtain the better effect of the first support base 15 and the second support base 16 supporting the first screw 121, the first support base 15 is located at the right end of the first nut 122 and the first screw 121. In the intermediate position, the second support base 16 is located at an intermediate position between the first nut 122 and the left end of the first screw 121. Thus, the second rate V2 is less than the first rate V1, and the second speed V2 is When the first rate V1 is twice the second rate V2, the travel of the mobile platform 11 by the first support base 15 or the second support base 16 can be minimized.

It should be noted that, in the preferred embodiment, the driving device has a first transmission wheel 141, a second transmission wheel 142, a first driving wheel 143, a second driving wheel 144, a driving motor 145, A first flexible element 146 and a second flexible element 147.

The first transmission wheel 141 is fixed to the first nut 122, and the second transmission wheel 142 is fixed to the second nut 132. The first driving wheel 143 and the second driving wheel 144 are fixed to the driving. The rotating shaft of the motor 145 is driven by the driving motor 145. The first flexible component 146 is hung on the first driving wheel 141 and the first driving wheel 143 to cause the first driving wheel 143 to drive the first driving wheel 141. The second flexible component 147 is mounted on the second transmission wheel 142 and the second drive wheel 144 to cause the second drive wheel 144 to drive the second transmission wheel 142. In the preferred embodiment, the first transmission wheel 141, the second transmission wheel 142, the first driving wheel 143 and the second driving wheel 144 are exemplified by a pulley, but not limited thereto. It is a gear. The first flexible element 146 and the second flexible element 147 are exemplified by a belt in the preferred embodiment, and may also be a chain. The driving motor 145 simultaneously drives the first driving wheel 143 and the second driving wheel 144, and transmits power to the first transmission wheel 141 and the first flexible element 146 and the second flexible element 147. The second transmission wheel 142, in turn, drives the first nut 122 and the second nut 132 simultaneously.

Next, referring to the seventh figure, a second preferred embodiment of the present invention is described. It is an embodiment of the first preferred embodiment, wherein the first transmission wheel 141 and the second transmission wheel 142 have the same outer diameter. The first driving wheel 143 and the second driving wheel 144 have the same outer diameter. The first screw 121 has a first thread groove 121a, the first thread groove 121a has a first lead; the second screw 131 has a second thread groove 131a, and the second thread groove 131a has a second guide. Cheng. The first thread groove 121a is opposite to the groove direction of the second thread groove 131a, and the first lead is larger than the second lead. Similarly, if the first support base 15 and the second support base 16 are to obtain the better effect of supporting the first screw 121, the first support base 15 is located at the first nut 122 and the first screw. The intermediate position of the right end of the 121 is also located at an intermediate position between the first nut 122 and the left end of the first screw 121. The first lead is twice the second lead, which can make The travel of the mobile platform 11 that cannot be moved due to being blocked by the first support base 15 or the second support base 16 is minimized.

Referring to the eighth embodiment, a third preferred embodiment of the present invention is described. The third preferred embodiment of the present invention is an embodiment of the first preferred embodiment, wherein the outer diameter of the first transmission wheel 141 is smaller than the second transmission wheel 142. The first drive wheel 143 and the second drive wheel 144 have the same outer diameter. The first thread groove 121a is opposite to the groove direction of the second thread groove 131a, and the first lead is equal to the second lead. Similarly, if the first support base 15 and the second support base 16 are to obtain the better effect of supporting the first screw 121, the first support base 15 is located at the first nut 122 and the first screw. The intermediate position of the right end of the 121 is also located at an intermediate position between the first nut 122 and the left end of the first screw 121. The outer diameter of the first transmission wheel 141 is the outer diameter of the second transmission wheel 142. Half, this can minimize the travel of the mobile platform 11 that cannot be moved due to being blocked by the first support base 15 or the second support base 16.

Next, referring to the ninth embodiment, a fourth preferred embodiment of the present invention is described, which is an embodiment of the first preferred embodiment, wherein the first transmission wheel 141 and the second transmission wheel 142 have the same outer diameter. The outer diameter of the first driving wheel 143 is larger than the outer diameter of the second driving wheel 144. The first thread groove 121a is opposite to the groove direction of the second thread groove 131a, and the first lead is equal to the second lead. In order to obtain the first support member 15 and the second support base support 16, the first screw 121 has a better effect, and the first support base 15 is located at the right end of the first nut 122 and the first screw 121. In the intermediate position, the second support base 16 is located at an intermediate position between the first nut 122 and the left end of the first screw 121. The outer diameter of the first drive wheel 143 is twice the outer diameter of the second drive wheel 144. In this way, the travel of the mobile platform 11 by the first support base 15 or the second support base 16 can be minimized.

In addition, as shown in the tenth figure, in order to reduce the frictional resistance of the first support base 15 relative to the movement of the first screw 121, the first support base 15 has a first axle 151 and a second axle at the top end. 152, are clamped to each other by a predetermined angle. A first roller 153 and a second roller 154 are respectively pivotally connected to the first axle 151 and the second axle 152, and support the first screw 121. If the first support base 15 moves relative to the first screw 121, the first roller 153 and the second roller 154 are in rolling contact to reduce frictional resistance. It should be noted that the foregoing method of setting the roller can also be applied to the second support base 16, which will not be described herein.

Finally, referring to the tenth to eleventh drawings, a fifth preferred embodiment of the present invention is introduced, which differs from the first preferred embodiment only in the first preferred embodiment, the first The screw nut group 12 and the second screw nut group 13 are disposed above and below; and in the fifth preferred embodiment, the first screw nut group 12 and the second screw nut group 13 are disposed left and right. . Therefore, the present invention can appropriately adjust the position between the first screw nut group 12 and the second screw nut group 13 as the user demands.

In summary, it can be seen that the screw nut combination with the support seat provided by the present invention can surely reduce the travel of the mobile platform 11 when the mobile platform 11 moves on the first screw 121, and the structure is relatively used. The method of gas and hydraulic driving is low in cost.

11. . . mobile platform

12. . . First screw nut set

121. . . First screw

121a. . . First thread groove

122. . . First nut

13. . . Second screw nut set

131. . . Second screw

131a. . . Second thread groove

132. . . Second nut

14. . . Drive unit

141. . . First transmission wheel

142. . . Second transmission wheel

143. . . First drive wheel

144. . . Second drive wheel

145. . . Drive motor

146. . . First flexible element

147. . . Second flexible element

15. . . First support

151. . . First axle

152. . . Second axle

153. . . First wheel

154. . . Second wheel

16. . . Second support

20. . . Fastener

V1. . . First rate

V2. . . Second rate

The first picture is a conventional technique;

The second picture is a conventional technique;

The third drawing is a front view of a first preferred embodiment of the present invention;

Figure 4 is a partial enlarged view of a first preferred embodiment of the present invention;

Figure 5 is a schematic view showing the operation of the first preferred embodiment of the present invention;

Figure 6 is a schematic view showing the operation of the first preferred embodiment of the present invention;

7 is a partial enlarged view of the second preferred embodiment of the present invention, showing that the first thread groove and the second thread groove are opposite to each other, and the first lead is larger than the second lead;

Figure 8 is a partial enlarged view of the third preferred embodiment of the present invention, showing that the outer diameter of the first transmission wheel is smaller than the outer diameter of the second transmission wheel;

Figure 9 is a partially enlarged view of a fourth preferred embodiment of the present invention, showing that the outer diameter of the first drive wheel is larger than the outer diameter of the second drive wheel;

10 is a partial enlarged view of a preferred embodiment of the present invention, showing a first wheel, a second wheel axle, a first roller and a second roller;

11 is a perspective view of a fifth preferred embodiment of the present invention;

Figure 12 is a plan view of a fifth preferred embodiment of the present invention.

11. . . mobile platform

12. . . First screw nut set

121. . . First screw

121a. . . First thread groove

122. . . First nut

13. . . Second screw nut set

131. . . Second screw

131a. . . Second thread groove

132. . . Second nut

14. . . Drive unit

15. . . First support

16. . . Second support

V1. . . First rate

V2. . . Second rate

Claims (10)

A screw nut combination with a support base includes: a moving platform; a first screw nut group having a first screw and a first nut, the two ends of the first screw being respectively fixed to a fixing member The first nut is pivotally disposed on the moving platform and is sleeved on the first screw to move along the first screw; a second screw nut group has a second screw and a second screw a second nut is pivotally disposed on the moving platform, and the second screw is threaded and moved relative to the second nut; a driving device drives the first nut and the second nut simultaneously The first nut generates a first rate relative to the first screw when moving, and the second screw generates a second rate relative to the second nut when moving, the first rate being greater than the second The rate is opposite to the direction in which the second rate travels; and a first support base and a second support base are respectively fixed to the second screw to move along with the second screw and support the first screw. The screw nut combination with a support base according to claim 1, wherein the first rate is twice the second rate. The screw nut combination with a support base according to claim 1, wherein the driving device has a first transmission wheel, a second transmission wheel, a first drive wheel, a second drive wheel, and a Driving a motor, a first flexible element and a second flexible element; the first transmission wheel is fixed to the first nut, and the second transmission wheel is fixed to the second nut, the first drive The wheel and the second driving wheel are fixed to and driven by the rotating shaft of the driving motor, and the first flexible component is hung on the first driving wheel and the first driving wheel to cause the first driving wheel to drive the The first transmission wheel is mounted on the second transmission wheel and the second drive wheel to cause the second drive wheel to drive the second transmission wheel. The screw nut combination with a support base according to claim 3, wherein: the first transmission wheel and the second transmission wheel have the same outer diameter, and the first drive wheel and the second drive wheel have the same outer diameter The first screw has a first thread groove, the first thread groove has a first lead; the second screw has a second thread groove, the second thread groove has a second lead; the first The thread groove is opposite to the groove direction of the second thread groove, and the first lead is larger than the second lead. The screw nut combination with a support base according to claim 4, wherein the first lead is twice the second lead. The screw nut combination with a support base according to claim 3, wherein: the outer diameter of the first transmission wheel is smaller than the outer diameter of the second transmission wheel, and the outer diameter of the first driving wheel and the second driving wheel The first screw has a first thread groove, the first thread groove has a first lead; the second screw has a second thread groove, and the second thread groove has a second lead; A thread groove is opposite to a groove direction of the second thread groove, and the first lead is equal to the second lead. The screw nut combination with a support base according to claim 6, wherein the outer diameter of the first transmission wheel is half of the outer diameter of the second transmission wheel. The screw nut combination with a support base according to claim 3, wherein: the first transmission wheel and the second transmission wheel have the same outer diameter, and the outer diameter of the first drive wheel is larger than the second drive wheel The first screw has a first thread groove, the first thread groove has a first lead; the second screw has a second thread groove, and the second thread groove has a second lead; A thread groove is opposite to a groove direction of the second thread groove, and the first lead is equal to the second lead. The screw nut assembly with a support base according to claim 8, wherein the outer diameter of the first drive wheel is twice the outer diameter of the second drive wheel. The screw nut combination with a support base according to claim 1, wherein: the first support base has a first axle and a second axle at a top end, and is clamped to each other by a predetermined angle; The roller and a second roller are respectively pivotally connected to the first axle and the second axle, and support the first screw.