TWM575487U - Double nut ball screw for adjusting and measuring pre-compression - Google Patents

Abstract

An adjustable pre-compressed double-nut ball screw mainly comprises: a screw; a first nut through which the screw is threaded, one end of the first nut is annularly protruded with a flange, and the flange is Forming an external thread; a second nut for threading; a first rolling body unit disposed between the screw and the first nut; and a second rolling body unit disposed between the screw and the second nut; An adjusting ring having an internal thread is screwed onto the external thread of the first nut, and the outer surface of the adjusting ring has a groove; a measuring device having a fixing device, a limiting block and a pressing block a pressure sensor, the holder is fixed in the groove, the restriction block is placed in the groove, and one side of the restriction block has a limiting slope attached to the holder, and the pressing block is placed in the groove, and one side is The limiting block is attached, and the other side is abutted against one end surface of the second nut, and the pressure sensor is located between the limiting block and the pressing block; thereby achieving a simple structure, less assembly procedures, and effectively reducing manufacturing and assembly costs. At the same time, it also has the adjustment of pre-pressure and the measurement of pre-pressure and the adjustment of pre-pressure. And other effects of increased dramatically.

Description

Adjustable pre-compressed double nut ball screw

This creation is related to the ball screw, and more specifically to an adjustable preloaded double nut ball screw.

According to the characteristics of high precision positioning, long life, low pollution, high speed forward and reverse transmission and conversion transmission, the ball screw has gradually become an important component in the positioning and measurement system of precision technology and machinery industry. However, since the ball screw assembly requires a predetermined pre-pressure to maintain rigidity by its pre-pressure, it is possible to avoid a situation in which accuracy is not good. Therefore, the pre-pressure of the ball screw needs to be measured and adjusted. In the conventional double-nut type ball screw, as disclosed in Chinese Patent No. I336755, it mainly includes a screw, a second nut and a pre-pressing device. The two nuts are disposed on the screw, the pre-pressing device is disposed between the two nuts, and the pre-pressing device comprises at least two guiding portions disposed on opposite end faces of the two nuts, and At least two pressure guiding members are disposed between the guiding portions of the two nuts, and at least one adjusting member is disposed between the two pressure guiding members to control the position of the two pressure guiding members on the guiding portion. A displacement along the axial direction of the screw is generated to adjust the spacing and tightness between the nuts. However, the ball screw disclosed above has a preloading device for adjusting the preload, but since the components of the preloading device are numerous and complicated to install, the cost of manufacturing and assembly is inevitably increased. Moreover, since the ball screw disclosed above has to have at least two inclined portions, if the processing of the two inclined portions is not uniform, the application of the pre-pressure is uneven. Furthermore, since the preloading device can only be used to adjust the pre-pressure, but the adjusted pre-pressure value cannot be measured at the same time, it is necessary to use an additional measuring instrument for measurement, if the pre-pressure value is incorrect. At the same time, the procedure of adjusting the pre-pressure must be repeated, and the adjustment process is quite long, and the efficiency of adjusting the pre-pressure is not good.

In view of this, in order to improve the prior art, the conventional ball screw with pre-pressure adjustment has too many components, complicated assembly procedures, high manufacturing and assembly costs, and cannot adjust the pre-pressure and pre-pressure, and adjust the pre-pressure. The problem is that the efficiency is not good and the uneven force is easy to occur. Therefore, the present invention provides a double-nut ball screw with adjustable measurement and pre-compression, which mainly comprises: a screw; a first nut; The screw is axially bored, and a first load path is formed between the screw and the first nut, and one end of the first nut is axially annularly protruded with a flange, and an outer surface of the flange is formed on the outer circumferential surface. a second nut is disposed in the axial direction of the screw, and a second load path is formed between the screw and the second nut; a first rolling body unit is disposed in the first load path, For performing an infinite loop scrolling; a second rolling body unit is disposed in the second load path for performing an infinite loop scrolling; an adjusting ring having an internal thread, the outer surface of the adjusting ring having a groove The tone An opening communicating with the groove is formed on one end surface of the ring, the internal thread of the adjusting ring is screwed to the external thread of the first nut; a measuring device has a fixing device, a limiting block, and a forced a tightening block and a pressure sensor, the fixing device is fixed in the groove of the adjusting ring, the limiting block is placed in the groove of the adjusting ring, and the limiting block has a limiting inclined surface on one side thereof, the limiting inclined surface Attached to the holder, the pressing block is disposed in the groove of the adjusting ring, one side is attached to the limiting block, and the other side is exposed outside the opening and is end face of the second nut Abutting, the pressure sensor is located between the limiting block and the pressing block; thereby achieving a simple structure, less assembly procedures, and effectively reducing manufacturing and assembly costs, and simultaneously adjusting the amount of pre-pressure and pre-pressure Measure and improve the efficiency of adjusting the pre-pressure.

In order to enable the review committee to have a better understanding and recognition of the features and characteristics of this creation, the following preferred embodiments are illustrated with the following description: Please refer to the first to third figures, which is a better The embodiment of the present invention provides an adjustable pre-compressed double-nut ball screw 100, which mainly includes a screw 10, a first nut 20, a second nut 30, a first rolling body unit 40, and a The second rolling element unit 50, an adjusting ring 60 and a measuring device 70, wherein: the first to third figures, the screw 10 has an outer surface having at least one spiral screw groove 11. Referring to the first to third figures, the first nut 20 has a first through hole 21 extending through the first through hole 21, and the first through hole 21 is formed by the screw 10, and the wall surface of the first through hole 21 is formed with at least A first nut groove 22 is formed by the first nut groove 22 and the screw groove 11 as a first load path. One end of the first nut 20 is annularly annularly protruded with a flange 23, and an external thread 24 is formed on the outer peripheral surface of the flange 23. Referring to the first to third figures, the second nut 30 has a second through hole 31 extending through the second through hole 31. The second through hole 31 is formed by the screw 10, and the wall surface of the second through hole 31 is formed at least. A second nut groove 32 is formed by the second nut groove 32 and the screw groove 11 as a second load path. The flange 23 of the first nut 20 is adjacent to one end surface of the second nut 30. Referring to the first to third figures, the first rolling element unit 40 is a plurality of steel balls disposed on the screw groove 11 of the screw 10 and the first nut groove 22 of the first nut 20 . The first load path formed together to perform an infinite loop scrolling. Referring to the first to third figures, the second rolling element unit 50 is a plurality of steel balls disposed on the screw groove 11 of the screw 10 and the second nut groove 32 of the second nut 30. The second load path formed together to perform an infinite loop scrolling. Referring to the first to third figures, the adjusting ring 60 has an internal thread 61 in the axial direction, and the outer surface of the adjusting ring 60 has a groove 62. One end surface of the adjusting ring 60 is formed with the concave surface. The opening 62 of the slot 62 communicates. The adjusting ring 60 is screwed onto the external thread 24 of the first nut 20 by the internal thread 61 . Referring to the first to third figures, the measuring device 70 has a holder 71, a limiting block 72, a pressing block 73 and a pressure sensor 74. The fixing member 71 has a fixing block 711 and a fixing screw 712. The fixing block 711 has a through hole 713 extending through the top. The fixing block 711 has a fixing slope 715 on one side thereof, and the fixing screw 712 passes through the fixing block. The through hole 713 of the 711 is locked to the bottom wall of the groove 62 of the adjusting ring 60, so that the fixing block 711 is fixed in the groove 62. The side of the limiting block 72 has a limiting slope 721, and the limiting block 72 is The fixing block 73 is disposed in the recess 62 of the adjusting ring 60, and the pressing block 73 is disposed in the recess 62 of the adjusting ring 71. The pressing block 73 is disposed in the recess 62 of the adjusting ring 60. Attached to the limiting block 72, the other side is exposed outside the opening 63 and abuts against one end surface of the second nut 30. The pressure sensor 74 has a sensing portion 741 and a sense The measuring portion 741 is electrically connected to the transmitting portion 742, and the sensing portion 741 is located between the limiting block 72 and the pressing block 73. Therefore, the above description is a description of the various components of the adjustable preloaded double nut ball screw 100 and the assembly manner thereof, and then the use characteristics thereof are as follows: First, After the creation of the creation is completed, the adjustment ring 60 can be rotated to change the tightness between the pressing block 73 and the second nut 30, and the pressure is measured by the sensing portion 741 of the pressure sensor 74. Then, the transmission portion 742 is externally transmitted, so that the author can immediately know the value of the pre-pressure, and continuously rotate the adjustment ring 60 until the value of the pre-pressure reaches a preset value. In this way, the components required for this creation are relatively simple, and the assembly procedure is small, which can effectively reduce the manufacturing and assembly costs. Moreover, the creation can simultaneously adjust the pre-pressure and the pre-pressure to allow the efficiency of the pre-pressure to be adjusted. Significantly improved. The above description is only for the preferred embodiment provided by the present invention, and is not intended to limit the scope of implementation of the present invention. All of the relevant artisans in the art are equally varied according to the present creation, and should belong to the present invention. The scope of coverage.

100‧‧‧Adjustable pre-compression double nut ball screw

10‧‧‧ screw

11‧‧‧ screw groove

20‧‧‧ first nut

21‧‧‧First perforation

22‧‧‧First nut groove

23‧‧‧Flange

24‧‧‧ external thread

30‧‧‧Second nut

31‧‧‧Second perforation

32‧‧‧Second nut groove

40‧‧‧First rolling element unit

50‧‧‧Second rolling element unit

60‧‧‧Adjustment ring

61‧‧‧ internal thread

62‧‧‧ Groove

63‧‧‧ openings

70‧‧‧Measurement device

71‧‧‧Retainer

711‧‧‧Fixed block

713‧‧‧Perforation

715‧‧‧ Fixed bevel

712‧‧‧ fixing screws

72‧‧‧Restriction block

721‧‧‧Restricted slope

73‧‧‧Forcing block

74‧‧‧pressure sensor

741‧‧‧Sensor

742‧‧‧Transportation Department

The first figure is an exploded perspective view of a preferred embodiment of the present invention. The second drawing is a perspective assembled view of the embodiment shown in the first figure. The third drawing is a combined cross-sectional view and a partial enlarged view of the embodiment shown in the first figure.

Claims (6)

The utility model relates to an adjustable pre-compressed double-nut ball screw, which mainly comprises: a screw; a first nut for axially piercing the screw, and a first between the screw and the first nut a load path, one end of the first nut protrudes annularly with a flange, and an outer thread is formed on the outer circumferential surface of the flange; a second nut is axially inserted through the screw, and the screw and the screw a second load path is formed between the second nut; a first rolling body unit is disposed in the first load path for performing an infinite loop rolling; and a second rolling body unit is disposed at the second load In the path, the infinite loop is rolled; an adjusting ring has an internal thread, and the outer surface of the adjusting ring has a groove, and an end surface of the adjusting ring is formed with an opening communicating with the groove, the adjusting ring The internal thread is screwed onto the external thread of the first nut; a measuring device has a fixing device, a limiting block, a pressing block and a pressure sensor, and the fixing device is fixed to the adjusting ring In the groove, the restriction block is placed in the groove In the groove of the adjusting ring, one side of the limiting block has a limiting inclined surface, and the limiting inclined surface is attached to the fixing device, and the pressing block is disposed in the groove of the adjusting ring, and one side is attached to the limiting block The other side is exposed outside the opening and abuts against one end surface of the second nut, and the pressure sensor is located between the limiting block and the pressing block. The double-nut ball screw of the adjustable type pre-compression according to the first aspect of the patent application, wherein the outer surface of the screw has at least one spiral groove; the first nut is axially penetrated a first through hole, the first through hole is bored, and the first perforated hole wall surface is formed with at least one first nut groove to be formed by the first nut groove and the screw groove together a first load path; the second nut is axially inserted through a second through hole, the second through hole is bored by the screw, and the second perforated hole wall surface is formed with at least one second nut groove for A second nut groove is formed with the screw groove as the second load path. The double-nut ball screw of the adjustable type pre-compression according to the first aspect of the patent application, wherein the first rolling element unit is a plurality of steel balls; and the second rolling element unit is a plurality of steel balls. The adjustable double-nut ball screw according to the first aspect of the patent application, wherein the fixing device has a fixing block and a fixing screw, and the fixing block has a perforation through the top and bottom. The fixing screw is inserted through the through hole of the fixing block to be locked to the bottom wall of the adjusting ring, and one side of the fixing block is attached to the limiting slope of the limiting block. The double-nut ball screw of the adjustable type pre-compression according to claim 4, wherein one side of the fixing block has a fixed inclined surface, and the fixed inclined surface is attached to the limiting inclined surface of the limiting block. The double-nut ball screw of the adjustable type pre-compression according to the first aspect of the patent application, wherein the pressure sensor of the measuring device has a sensing portion and a transmission portion electrically connected to the sensing portion The sensing portion is located between the limiting block and the pressing block, and the transmitting portion is configured to transmit the pre-pressure value measured by the sensing portion to the outside.