TWM555432U - Driving coupling structure of ball screw - Google Patents

Abstract

The present invention is a drive connection structure of a ball screw, comprising: a screw having a shoulder, the shoulder having an extension and an externally threaded section; a bearing set secured to the extension of the shoulder and having a bearing side; a pulley is sleeved on the shoulder and has a first side opposite to the side of the bearing, a second side, a reinforcing portion disposed between the first and second sides, and a set a gear portion between the reinforcing portion and the second side surface, and a through hole extending through the first and second sides, the through hole having a set of straight hole segments disposed in the extending portion, and a screwing threaded on the external thread The internal thread segment of the segment. Accordingly, the structural strength of the shoulder of the screw is increased, and the problem of uneven stress on the shoulder of the screw is reduced, and the problem of reduced accuracy and insufficient concentricity is avoided.

Description

Ball screw drive connection structure

The novel system is related to a ball screw, in particular to a transmission connection structure of a ball screw.

Referring to FIG. 1A, one of the drawings of a "side joint mechanism" of the Republic of China application No. 105112679 is shown; it is mainly applied to a linear module and a side mechanism of a motor shaft, and includes a bearing housing 11 and a joint member 12 And a pulley set 13. The bearing housing 11 is fixed to the linear module 14 and includes a bearing 141 disposed thereon. The engaging member 12 is coupled to the linear module and abuts against the bearing 141 and is pivotally mounted to the bearing housing 11. The pulley set 13 is mounted on the engaging member 12 and a motor shaft (not shown) to drive the engaging member 12 to rotate, thereby interlocking the linear module through the engaging member 12. However, it has at least the following drawbacks to be improved:

First, since the pulley 131 is indirectly disposed on the screw 142, that is, after the engaging member 12 is disposed on the shoulder portion 1421 of the screw 142, the pulley 131 is further sleeved and fixed to the engaging member 12 so as to be coupled with the screw. In order to increase the structural strength of the shoulder portion 1421 of the screw 142, a nut 15 is further disposed on the shoulder portion 1421 of the screw 142. Thus, the pulley 131, the engaging member 12, and the nut 15 are disposed. Although the linkage is increased and the strength of the shoulder portion 1421 of the screw 142 is increased, the component cost is high and the assembly is time-consuming and labor-intensive due to the excessive number of components.

Secondly, since the nut 15 and the engaging member 12 disposed on the shoulder portion 1421 of the screw 142 have a gap between the nut 15 and the bearing 143, the shoulder portion 1421 of the screw 142 is caused. The stress is uneven.

Referring to FIG. 1B, one of the drawings of the "power-sustaining structure of a ball screw" of the Republic of China application No. 104220269 is shown; the ball screw 16 processed without end is firmly tightened mainly by the keyless coupling structure. The connection is made, and the power input device is connected to the other end side to continue the power, so as to achieve the purpose of true power transmission. However, it has at least the following drawbacks to be improved:

First, the keyless coupling structure is fixed at one end of the splicer 17 with a nut 18 at one end of the ball screw 16, and then supported by the bearing 191 and the bearing housing 192 to be fixed on the splicer 17 At one end, the pulley 10 is finally sleeved and fixed to the splicer 17, so that not only the components are too much, but also the component structure is too complicated, which also causes high cost of parts and labor and assembly.

Secondly, the keyless coupling structure is clamped and fixed to the ball screw 16 processed at the endless portion, but the splicer 17 is clamped on the ball screw 16 by the clamping portion 171 arranged in a claw shape. One end, and finally, the clamping portion 171 is tightened by the nut 18 to achieve the connection between the splicer 17 and the ball screw 16, and the nip portion 171 is clamped on the ball. The manner of the screw 16 causes the center of the splicer 17 to deviate from the axis of the ball screw 16, which causes problems of accuracy and concentricity.

The purpose of the present invention is to provide a transmission connection structure of a ball screw, which mainly reduces assembly components, improves installation efficiency and reduces cost.

Another object of the present invention is to provide a transmission connection structure of a ball screw which mainly reduces the problem of uneven stress on the shoulder of the screw.

A further object of the present invention is to provide a transmission connection structure for a ball screw which mainly avoids the problem of reducing accuracy and concentricity.

In order to achieve the above objective, the present invention is a transmission connection structure of a ball screw, comprising: a screw having a shoulder, the shoulder having an extension and an externally threaded section; a bearing set fixed on the shoulder An extension portion having a bearing side; a pulley fixed to the shoulder and having a first side against the side of the bearing, a second side opposite to the first side, and a pulley a reinforcing portion between the first and second sides, a gear portion disposed between the reinforcing portion and the second side, and a through hole extending through the first and second sides, the through hole having a set disposed on the extending portion a straight bore section and an internally threaded section threaded into the externally threaded section.

Accordingly, the present invention provides a transmission connection structure of a ball screw, which is sleeved on a shoulder of the screw by the pulley, so that the shoulder is covered by the reinforcing portion and the gear portion of the pulley, thereby increasing the screw The structural strength of the shoulder reduces the problem of uneven stress on the shoulder of the screw, and at the same time, the pulley is used to improve the installation efficiency and reduce the cost, and the problem of reduced accuracy and insufficient concentricity can be avoided.

Preferably, the pulley further has a locking portion disposed between the gear portion and the second side, the locking portion has a first locking arc connected to the gear portion, and a connection a first locking arc segment of the first locking arc segment and separated from the gear portion, the first locking arc segment having a first threaded arc surface disposed on the external thread segment and a first locking surface The second locking arc segment has a second thread segment that is coupled to or separated from the first threaded arc surface and is coupled to the external thread segment, and a second locking member that abuts or separates from the first locking surface The driving connection structure of the ball screw further has a positioning screw, and the positioning screw is screwed between the first and second locking arc segments for abutting or separating the first and second locking surfaces, and The second threaded segment is joined or separated from the externally threaded section.

Preferably, the first locking arc segment further has a locking screw groove recessed by the first locking surface, and the second locking arc segment further has a second locking surface and The locking screw hole of the screw groove should be locked, and the positioning screw is screwed between the locking screw hole and the locking screw groove.

Preferably, the shoulder portion of the screw further has a shaft segment connecting the external thread segment and having a non-circular cross section; the transmission connection structure of the ball screw further has a positioning member and a plurality of positioning screws, and the positioning member sleeve Positioned on the shaft segment and abutting against the second side of the pulley, each of the positioning screws is locked between the positioning member and the pulley.

Preferably, the pulley further has a plurality of positioning screw holes recessed by the second side, the positioning member has a positioning shaft hole which is non-circular in cross section and is sleeved in the shaft segment, and the plurality of corresponding holes Positioning the through holes of the screw holes, each of the positioning screws is locked between the positioning screw holes and the positioning holes.

Preferably, the pulley has a radial screw hole extending through the gear portion and communicating with the through hole. The transmission connection structure of the ball screw further has a positioning screw, and the positioning screw is screwed to the radial screw hole. And having a positioning surface on the external thread segment.

In addition, for the above purpose, the present invention further provides a transmission connection structure of a ball screw, comprising: a screw having a shoulder, the shoulder having an extension and an externally threaded section; a bearing set, being sleeved on An extension of the shoulder and having a bearing side; a reinforcing sleeve secured to the shoulder and having a reinforcing side against the side of the bearing, a reinforcing ring portion secured to the extension, and a clamping claw fixed to the extending portion and having a plurality of slots; a pulley is sleeved between the shoulder and the reinforcing sleeve, and has a first side and a first side opposite to the first side a second side, a gear portion disposed between the first and second sides, and a through hole extending through the first and second sides, the through hole having a set of tapered holes disposed in the clamping claw portion, And an internal thread segment that is screwed into the externally threaded section.

Accordingly, the present invention provides a transmission connection structure of a ball screw, which is fastened to the shoulder of the screw by the reinforcing sleeve with the pulley, so that the shoulder is covered by the reinforcing sleeve and the pulley, thereby increasing The structural strength of the shoulder of the screw reduces the problem of uneven stress on the shoulder of the screw, and at the same time, only the reinforcing kit is matched with the pulley assembly, thereby improving installation efficiency and reducing cost, and avoiding precision reduction and insufficient concentricity. The problem.

Preferably, the clamping claw portion of the reinforcing sleeve has an outer annular surface which is inclined and tapered, and the tapered hole portion of the pulley is pressed against the outer annular surface.

Preferably, the pulley further has a locking portion disposed between the gear portion and the second side, the locking portion has a first locking arc connected to the gear portion, and a connection a first locking arc segment of the first locking arc segment and separated from the gear portion, the first locking arc segment having a first threaded arc surface disposed on the external thread segment and a first locking surface The second locking arc segment has a second thread segment that is coupled to or separated from the first threaded arc surface and is coupled to the external thread segment, and a second locking member that abuts or separates from the first locking surface The driving connection structure of the ball screw further has a positioning screw, and the positioning screw is screwed between the first and second locking arc segments for abutting or separating the first and second locking surfaces, and The second threaded segment is joined or separated from the externally threaded section.

Preferably, the first locking arc segment further has a locking screw groove recessed by the first locking surface, and the second locking arc segment further has a second locking surface and The locking screw hole of the screw groove should be locked, and the positioning screw is screwed between the locking screw hole and the locking screw groove.

Before the detailed description is made, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 2 to FIG. 5B , the first embodiment of the present invention provides a transmission connection structure of a ball screw for dynamically connecting with a motor pulley 23 provided on the drive motor 22 by a timing belt 21 . The transmission connection structure of the ball screw is mainly composed of a screw 30, a bearing set 40, a pulley 50, and a positioning screw 60, wherein:

The screw 30 has a shoulder 31 having an extension 311 and an externally threaded section 312.

The bearing set 40 is sleeved on the extension 311 of the shoulder 31 and has a bearing side 41.

The pulley 50 is sleeved on the shoulder 31 and has a first side 51 opposite to the bearing side 41 and a second side 52 opposite to the first side 51. a reinforcing portion 53 between the two side surfaces 51 and 52, a gear portion 54 disposed between the reinforcing portion 53 and the second side surface 52 and interposed between the timing belt 21, and a first and second sides extending through the first and second sides a through hole 55 of 51, 52 having a straight hole portion 551 disposed in the extension portion 311 and an internal thread portion 552 screwed to the externally threaded portion 312; in the embodiment, the pulley 50 is further There is a locking portion 56 disposed between the gear portion 54 and the second side surface 52. The locking portion 56 has a first locking arc segment 561 connected to the gear portion 54 and a first connection. a second locking arc segment 562 that is locked to the arc portion 561 and separated from the gear portion 54. The first locking arc segment 561 has a first threaded arc surface 5611 and a first lock disposed on the externally threaded portion 312. a solid surface 5612, and a locking screw groove 5613 recessed by the first locking surface 5612, the second locking arc segment 562 has a surface facing the first threaded arc surface 5611 and the external thread segment 31 The second threaded portion 5621 of the combined or separated second threaded portion 5621, and the second locking surface 5622 which is in contact with or separated from the first locking surface 5612, and the second locking surface 5622, and corresponding to the locking groove Locking screw hole 5623 of 5613. In addition, in another embodiment, the second locking arc segment 562 of the locking portion 56 can be separated from the first locking arc segment 561.

The positioning screw 60 is screwed between the locking screw hole 5623 and the locking screw groove 5613, and is screwed between the first and second locking arc segments 561 and 562 for making the first The two locking surfaces 5612, 5622 abut or separate, and the second thread segment 5621 is joined or separated from the external thread segment 312. Referring to FIG. 5A, it is shown that the positioning screw 60 does not tightly lock the first and second locking arc segments 561 and 562. At this time, the first and second locking surfaces 5612 and 5622 are separated, and the second The threaded section 5621 is separated from the externally threaded section 312, and in this state the pulley 50 can be unscrewed or screwed into the screw 30. Referring to FIG. 5B, the positioning screw 60 is tightly locked to the first and second locking arc segments 561 and 562. At this time, the first and second locking surfaces 5612 and 5622 are in abutting state, and the second The threaded section 5621 is coupled to the externally threaded section 312 such that the locking portion 56 is locked and fixed to the externally threaded section 312 of the screw 30, and in this state, the pulley 50 is in the same state as the screw 30.

The above description is the configuration description of each main component of the first embodiment of the creation. The following describes the use and efficacy of this creation.

First, improve installation efficiency and reduce costs. When assembling, the pulley 50 only needs to be inserted into the shoulder 31 of the screw 30, and the straight hole section 551 of the pulley 50 is guided and screwed to the external thread section of the shoulder 31 with the internal thread section 552. 312, the pulley 50 is securely positioned on the screw 30. At the same time, the pulley 50 is locked to the screw 30 by the locking portion 56 of the pulley 50 with the positioning screw 60, and the internal thread segment 552 of the pulley 50 and the externally threaded portion 312 of the shoulder 31 of the screw 30 are further It is better to be tightly engaged to prevent the drive motor 22 from being loosened when the pulley 50 is rotated by the timing belt 21. Accordingly, the structural design of the present invention makes it possible to assemble the pulley 50 with the design of the screw 30 and the pulley 50, so that the pulley 50 can be stably assembled on the shoulder 31 of the screw 30. Improve installation efficiency and reduce costs.

Second, the problem of uneven stress in the shoulder portion 31 of the screw 30 is reduced. Since the present invention is assembled, the straight hole section 551 of the pulley 50 is sleeved on the extension 311 of the shoulder 31, and the internal thread section 552 is screwed to the externally threaded section 312 of the shoulder 31 while the pulley The first side 51 of the pair 50 abuts against the bearing side 41, and the first side 51 of the pulley 50 and the perforation 55 have a precision of perpendicularity, so that the first side 51 of the pulley 50 will be screwed when the screw 50 is screwed The bearing side surface 41 of the bearing set 40 is fixedly compressed. Thus, the shoulder portion 31 of the screw 30 is covered by the reinforcing portion 53 of the pulley 50 and the gear portion 54, thereby increasing the structural strength of the shoulder portion 31 of the screw 30 and reducing The shoulder 31 of the screw 30 has a problem of uneven stress.

Third, avoid the problem of reducing accuracy and concentricity. Since the pulley 50 is guided by the straight hole section 551 and screwed to the external thread section 312 of the shoulder 31 with the internal thread section 552, the pulley 50 can be positioned on the screw 30, thereby being effective. It is avoided that the center of the hole of the through hole 55 of the pulley 50 is deviated from the axial center of the screw 30, and it is possible to avoid the problem of reduced accuracy and insufficient concentricity.

Fourth, shorten the length and reduce the torque. Since the present invention is assembled, the straight hole section 551 of the pulley 50 is sleeved on the extension 311 of the shoulder 31, and the internal thread section 552 is screwed to the externally threaded section 312 of the shoulder 31 while the pulley The first side 51 of the 50 is directly abutted against the bearing side 41, so that it is necessary to provide a nut on the shoulder of the screw before the pulley is placed on the shoulder of the screw. The effect of shortening the length, and also because the total length of the screw 30 after assembling the pulley 50 is reduced, the generation of torque is also reduced.

Referring to FIG. 6 to FIG. 8 , a second embodiment of the present invention provides a transmission connection structure of a ball screw, which is also composed of a screw 30 , a bearing set 40 , a pulley 50 , and a set screw 60 . The state and function are the same as those in the first embodiment, so they will not be described again. The difference in the second embodiment lies in:

The shoulder portion 31 of the screw 30 further has a shaft segment 313 which is connected to the external thread segment 312 and has a non-circular cross section. The transmission connection structure of the ball screw further has a positioning member 70 and a plurality of positioning screws 60. 70 is disposed on the shaft portion 313 and abuts against the second side 52 of the pulley 50. Each of the positioning screws 60 is locked between the positioning member 70 and the pulley 50. In this embodiment, the pulley 50 is further The positioning member 70 has a plurality of positioning screw holes 57 recessed by the second side surface 52. The positioning member 70 has a positioning shaft hole 71 which is non-circular in cross section and is sleeved in the shaft portion 313, and a plurality of corresponding positioning screw holes The positioning through holes 72 of the 57 are locked between the positioning screw holes 57 and the positioning through holes 72. In order to achieve another embodiment, it is easier to process the pulley 50 and reduce the cost.

Referring to FIG. 9, a third embodiment of the present invention provides a transmission connection structure of a ball screw, which is also composed of a screw 30, a bearing set 40, a pulley 50, and a set screw 60, due to its configuration and efficacy. The same as the first embodiment, it will not be described again. The difference in the third embodiment lies in:

The pulley 50 further has a radial screw hole 58 extending through the gear portion 54 and communicating with the through hole 55. The transmission connection structure of the ball screw further has a positioning screw 60. In the embodiment, the positioning screw 60 is a countersunk head. A set screw 60 is screwed to the radial screw hole 58 and has a positioning surface 61 that terminates in the outer thread segment 312 of the shoulder portion 31 of the screw 30. In order to achieve another embodiment, it is easier to process the pulley 50 and reduce the cost.

Referring to FIG. 10 and FIG. 11 , a fourth embodiment of the present invention provides a transmission connection structure of a ball screw, which is also dynamically connected to a motor pulley 23 provided on a drive motor 22 by a timing belt 21 . The transmission connection structure of the ball screw is composed of a screw 30, a bearing set 40, a reinforcing set 80, a pulley 50, and a set screw 60. The configuration of the screw 30 and the bearing set 40 and the approximate structure of the pulley 50 are the same as those of the first embodiment. An embodiment is not described again. The fourth embodiment differs in that:

The reinforcing sleeve 80 is sleeved on the shoulder 31 of the screw 30 and has a reinforcing side 81 against the bearing side 41 of the bearing set 40, a reinforcing ring portion 82 fixed to the extending portion 311, and A clamping claw portion 83 fixed to the extending portion 311 and having a plurality of slits 831; in the embodiment, the clamping claw portion 83 of the reinforcing sleeve 80 has an outer annular surface 832, and the outer annular surface 832 is reinforced by the outer ring surface 832 The ring portion 82 to the free end is inclined and tapered.

The pulley 50 is sleeved between the shoulder portion 31 and the reinforcing sleeve 80, and has a first side surface 51, a second side surface 52 opposite to the first side surface 51, and one of the first and second sides. a gear portion 54 between the side faces 51, 52, and a through hole 55 extending between the first and second side faces 51, 52, the through hole 55 having a set of tapered hole portions 553 disposed in the clamping claw portion 83, and An inner threaded section 552 is threaded onto the outer threaded section 312, and the tapered bore section 553 is correspondingly pressed against the outer annular surface 832 of the reinforcing sleeve 80. As for the locking portion 56 of the pulley 50, it is the same as that of the first embodiment, and therefore will not be described again.

Accordingly, in the fourth embodiment of the present invention, the reinforcing member 80 is fitted with the pulley 50 to the shoulder portion 31 of the screw 30, so that the shoulder portion 31 is covered by the reinforcing sleeve 80 and the pulley 50. Therefore, the structural strength of the shoulder portion 31 of the screw 30 is increased, and the problem of uneven stress of the shoulder portion 31 of the screw 30 is reduced. At the same time, only the reinforcing kit 80 is used in combination with the pulley 50 to improve installation efficiency and reduce cost. Avoid problems with reduced accuracy and insufficient concentricity.

In summary, the above embodiments and drawings are only preferred embodiments of the present invention, and the scope and scope of the present invention should not be limited thereto. It is within the scope of this creation patent.

[知知]
11‧‧‧ bearing housing
12‧‧‧Connecting parts
13‧‧‧ Pulley set
131‧‧‧ Pulley
141, 143‧ ‧ bearing
142‧‧‧ screw
1421‧‧‧ shoulder
15‧‧‧ nuts
16‧‧‧Ball screw
17‧‧‧Continuous connector
171‧‧ ‧ gripping department
18‧‧‧ nuts
191‧‧‧ bearing
192‧‧‧ bearing housing
10‧‧‧ Pulley [This creation]
21‧‧‧Time belt
22‧‧‧Drive motor
23‧‧‧Motor pulley
30‧‧‧ screw
31‧‧‧ shoulder
311‧‧‧Extension
312‧‧‧ External thread section
313‧‧‧ shaft segment
40‧‧‧ bearing set
41‧‧‧ bearing side
50‧‧‧ Pulley
51‧‧‧ first side
52‧‧‧ second side
53‧‧‧Reinforcement Department
54‧‧‧ Gear Department
55‧‧‧Perforation
551‧‧‧ Straight hole section
552‧‧‧Threaded section
553‧‧‧Cone hole section
56‧‧‧Locking
561‧‧‧First locking arc
5611‧‧‧First threaded surface
5612‧‧‧First lock surface
5613‧‧‧Locking groove
562‧‧‧Second locking arc
5621‧‧‧Second thread segment
5622‧‧‧Second lock surface
5623‧‧‧Locking screw hole
57‧‧‧ Positioning screw holes
58‧‧‧radial screw holes
60‧‧‧positioning screws
61‧‧‧ positioning surface
70‧‧‧ Positioning parts
71‧‧‧ Positioning shaft hole
72‧‧‧ Positioning perforation
80‧‧‧Reinforcement kit
81‧‧‧ reinforcing side
82‧‧‧ Strengthening the ring
83‧‧‧Clamping claws
831‧‧‧ slotting
832‧‧‧ outer annulus

Figure 1A is one of the drawings of a "side-linking mechanism" of the Republic of China application No. 105112679; Figure 1B is a diagram of a "power-sustaining structure of a ball screw" of the Republic of China application No. 104220269; 3 is an exploded perspective view of the first embodiment of the present invention; FIG. 4 is an axial sectional view of the first embodiment of the present invention; FIG. FIG. 5B is a radial cross-sectional view showing the first embodiment of the present invention, showing a state in which the locking portion of the pulley is locked; FIG. 6 is a second embodiment of the present invention. Figure 3 is a perspective sectional view of a second embodiment of the present invention; Figure 8 is an axial sectional view of a second embodiment of the present invention; and Figure 9 is an axial sectional view of a third embodiment of the present invention; Figure 10 is an exploded perspective view of a fourth embodiment of the present invention; Figure 11 is an axial sectional view of a fourth embodiment of the present invention.

21‧‧‧Time belt

22‧‧‧Drive motor

23‧‧‧Motor pulley

30‧‧‧ screw

31‧‧‧ shoulder

311‧‧‧Extension

312‧‧‧ External thread section

50‧‧‧ Pulley

51‧‧‧ first side

52‧‧‧ second side

53‧‧‧Reinforcement Department

54‧‧‧ Gear Department

55‧‧‧Perforation

56‧‧‧Locking

5623‧‧‧Locking screw hole

60‧‧‧positioning screws

Claims (10)

A drive connection structure for a ball screw, comprising: a screw having a shoulder having an extension and an externally threaded section; a bearing set secured to the extension of the shoulder and having a bearing side a pulley that is sleeved on the shoulder and has a first side that abuts against a side of the bearing, a second side that is opposite to the first side, and a first side that is disposed between the first and second sides a reinforcing portion, a gear portion disposed between the reinforcing portion and the second side surface, and a through hole penetrating the first and second sides, the through hole having a set of straight hole segments disposed in the extending portion, and a screw Engaged in the internal thread section of the externally threaded section. The transmission connection structure of the ball screw according to claim 1, wherein the pulley further has a locking portion disposed between the gear portion and the second side, the locking portion having a connection to the gear portion a locking arc segment, and a second locking arc segment connecting the first locking arc segment and separated from the gear portion, the first locking arc segment having a first thread arc disposed on the external thread segment And a first locking surface, the second locking arc segment having a second threaded section that is coupled to or separated from the first threaded arc surface and the external threaded section, and a first locking a second locking surface that is abutted or separated, the transmission connection structure of the ball screw further has a positioning screw, and the positioning screw is screwed between the first and second locking arc segments for making the first The two locking surfaces abut or separate, and the second thread segment is combined or separated from the external thread segment. The transmission connection structure of the ball screw according to claim 2, wherein the first locking arc segment further has a locking screw groove recessed by the first locking surface, and the second locking arc segment further has a The locking screw hole of the second locking surface corresponding to the locking groove is disposed, and the positioning screw is screwed between the locking screw hole and the locking screw groove. The transmission connection structure of the ball screw according to claim 1, wherein the shoulder of the screw further has a shaft section connecting the externally threaded section and having a non-circular cross section; the transmission connection structure of the ball screw has a positioning. And a plurality of positioning screws, the positioning member is sleeved on the shaft segment and abuts against the second side of the pulley, and each of the positioning screws is locked between the positioning member and the pulley. The transmission connection structure of the ball screw according to claim 4, wherein the pulley further has a plurality of positioning screw holes recessed by the second side, the positioning member has a cross section non-circular and is sleeved in the shaft segment The positioning shaft hole and the plurality of positioning holes corresponding to the positioning screw holes, each of the positioning screws is locked between the positioning screw hole and the positioning hole. The transmission connection structure of the ball screw according to claim 1, wherein the pulley further has a radial screw hole extending through the gear portion and communicating with the through hole, and the transmission connection structure of the ball screw further has a positioning screw, the positioning A screw thread is disposed on the radial screw hole and has a positioning surface that terminates in the external thread segment. A drive connection structure for a ball screw, comprising: a screw having a shoulder having an extension and an externally threaded section; a bearing set secured to the extension of the shoulder and having a bearing side a reinforcing kit secured to the shoulder and having a reinforcing side against the side of the bearing, a set of reinforcing ring portions secured to the extension, and a set of reinforcing slots extending in the extension and having a plurality of slots a clamping claw; a pulley fixed between the shoulder and the reinforcing sleeve, and having a first side, a second side opposite to the first side, and one of the first and second a gear portion between the sides, and a through hole extending between the first and second sides, the through hole having a set of tapered hole portions disposed on the clamping claw portion, and an internal thread screwed to the external thread portion segment. The transmission connection structure of the ball screw according to claim 7, wherein the clamping claw portion of the reinforcing sleeve has an outer annular surface, the outer annular surface is inclined and tapered, and the tapered hole portion of the pulley is pressed against the outer ring surface. The transmission connection structure of the ball screw according to claim 7, wherein the pulley further has a locking portion disposed between the gear portion and the second side, the locking portion having a connection to the gear portion a locking arc segment, and a second locking arc segment connecting the first locking arc segment and separated from the gear portion, the first locking arc segment having a first thread arc disposed on the external thread segment And a first locking surface, the second locking arc segment having a second threaded section that is coupled to or separated from the first threaded arc surface and the external threaded section, and a first locking a second locking surface that is abutted or separated, the transmission connection structure of the ball screw further has a positioning screw, and the positioning screw is screwed between the first and second locking arc segments for making the first The two locking surfaces abut or separate, and the second thread segment is combined or separated from the external thread segment. The transmission connection structure of the ball screw according to claim 9, wherein the first locking arc segment further has a locking screw groove recessed by the first locking surface, and the second locking arc segment further has a The locking screw hole of the second locking surface corresponding to the locking groove is disposed, and the positioning screw is screwed between the locking screw hole and the locking screw groove.