TWI445889B - Circulating assembly for ball screw - Google Patents

Description

Ball screw reflow element

The present invention provides a ball screw reflow element that is associated with a transmission.

The ball screw is a kind of high precision and widely used linear transmission component. In order to continuously circulate the ball, it must be equipped with a reflow device. The conventional reflow device is shown in Fig. 1, the reflow device. 10 In order to be suitable for the screw without teething, the reflow device 10 is composed of three separate members, and is composed of a first end plug member 11, a second end plug member 12 and a separating member 13. The first end plug member 11 and the second end plug member 12 respectively form a main return path by a first end plug member path 111 and a second end plug member path 121, and the separating member 13 has an auxiliary return flow. The path 131 is in communication with the main return path. The auxiliary return path 13 has only a semi-circular closed section. The ball must pass through the cooperation with the main return path. It can be seen that the reflow device 10 must be split into three. Separate components can be used for the purpose of screwing out the screw and providing reflow. The production must be divided into three parts, which leads to complicated production process and reduced production efficiency. In addition, it is also The return path of the reflow device 10 must pass through the auxiliary return path 131 of the semicircular arc shape to cooperate with the main return path for the balls to pass through, so that the joint between the separating member 13 and each of the end plug members 11 and 12 is inevitably caused to be broken, which is easily affected. The smooth running of the ball; as shown in Fig. 2 is another conventional reflow device 20, which is composed of a separate reflow member 21 and a fixing member 22, which provides reflow for the curved hollow tubular shape. The fixing member 22 can fix the reflow member 21 to the nut. However, in the assembly, since the outer peripheral surface of the reflow member 21 is a curved surface, there is a problem that the arc is facing in the assembly, and assembly occurs. For a certain difficulty, the lack of precision can not be accurately controlled; in view of this, the inventors have devoted themselves to research and further conceived, and after many trials and developments, finally invented a ball screw reflow element.

The invention provides a ball screw reflow element, the main purpose of which is to reduce the difficulty of production and assembly, and is more suitable for use in a screw without teething.

In order to achieve the foregoing object, the present invention provides a ball screw reflow element comprising a first reflow member and a second reflow member, the first reflow member being offset by a sleeve surface corresponding to the appearance of the reflow portion of the second reflow member The first reflow member and the second reflow member are disposed on the second reflow member and the first reflow member and the second reflow member, and the first reflow member and the second reflow member are respectively applicable to the screw without the teeth. The configuration of a reflow member and the second reflow member can be separately formed by forming a single mold unit, which does not need to be divided into molds, thereby reducing production difficulty; and the invention is more suitable for screw assembly without teething, It also has the advantage of being easy to assemble and reducing the difficulty of assembly.

In order to enable the reviewing committee to have a better understanding and understanding of the purpose, features and effects of the present invention, the following is a detailed description of the following: a preferred embodiment of the ball screw reflow element of the present invention, for example, the third As shown in FIG. 10, it is fitted on a nut 50, and the nut 50 is sheathed by a screw 60 having a rolling groove 51 therein. The screw 60 has a spiral groove 61 thereon. The groove 51 and the spiral channel 61 form a load path X and accommodate a plurality of rolling elements A, and the nut 50 has two end faces 52. Each of the end faces 52 is provided with a receiving groove 521, and the two receiving grooves 521 are connected. A through hole 522 is defined, and the reflow element comprises: a first reflow member 70, wherein the first reflow member 70 is integrally formed by a guiding portion 71 and a set of connecting portions 72, and the first reflow member 70 has a relative a first abutting surface 73 and a second abutting surface 74, the guiding portion 71 has a nail 711 and a guiding channel 712 extending therethrough, and the socket portion 72 has a U shape a sleeve surface 721 connected to the first abutment surface 73 and the second abutment surface 74 The first guiding portion 722 is provided with a plurality of first limiting portions 722. The first limiting portion 722 of the embodiment is a groove structure, and the first portion The retracting member 70 is received in the receiving groove 521 of the nut 50, and the second abutting surface 74 of the first reflowing member 70 abuts against the receiving groove 521, and the position of the sleeve portion 72 corresponds to the nut The through hole 522 of the first reflow member 70 is abutted against the screw 60; and a second reflow member 80 is integrally formed by a reflow section 81 and a positioning portion 82. The reflow section is formed. 81 is a cylindrical structure, and the reflow section 81 has a circular arc-like circumferential surface 811 and an end surface 812. The reflow section 81 is provided with a return passage 813 through which the two ends respectively penetrate the circumferential surface 811 and the end surface 812, and A plurality of second limiting portions 814 are disposed on the circumferential surface 811 of the reflowing portion 81. The second limiting portion 814 is a bump structure, and the positioning portion 82 is the positioning portion 82. A locking hole 821 is disposed, and the second reflow member 80 passes through the sleeve portion 72 of the first reflow member 70 with the reflow portion 81, and the circumferential surface 811 of the reflow portion 81 is abutted against a sleeve surface 721 of the first reflow member 70, and the positioning portion 82 of the second reflow member 80 abuts against the first abutment surface 73 of the first reflow member 70, and the reflow portion 81 protrudes from the first portion The contact surface 74 is inserted into the through hole 522 of the nut 50, and the return passage 813 of the second reflow member 80 communicates with the guiding channel 712 of the first reflow member 70. The second limiting portion 814 is received in the first limiting portion 722 to form a rotation stop limit, and the second reflow member 80 can be locked to the nut 50 through the locking hole 821 .

The above is the structural relationship of the ball screw reflow element of the present invention, and when assembled, the present invention can be used with the screw 60 which does not have teeth, and the nut 50 can be first sheathed after the screw 60, and then the first The reflow member 70 is received in the cavity 521 of the nut 50, and the rolling member A can be placed in the through hole 522 of the nut 50 at this time, as shown in Fig. 6, and the rolling member A is placed. The second reflow member 80 is inserted into the through hole 522 by the end surface 812 of the reflow section 81 to form a positioning, as shown in FIGS. 7 and 10, and can be matched with the locking hole 821 of the second reflow member 80. The two reflow members 80 are locked on the nut 50 to complete the assembly, as shown in Figures 8 and 9; as can be seen from the above, the assembly process of the ball screw reflow element of the present invention is simple, and the difficulty of the rolling element A of the device can be reduced, and the assembly can be reduced. The time required, at the same time, the configuration of the first reflow member 70 and the second reflow member 80 of the present invention can be respectively applied to the forming of the single body, and can be completed without the splitting, thereby not only reducing the cost of the pair of molds, And the production difficulty is low, which can improve production efficiency and yield.

"Knowledge Technology"

10. . . Reflow device

11. . . First end plug component

12. . . Second end plug part

13. . . Separator

111. . . First end plug component path

121. . . Second end plug component path

131. . . Auxiliary return path

321. . . Auxiliary return path

20. . . Reflow device

twenty one. . . Reflow piece

twenty two. . . Fastener

"this invention"

50. . . Nut

51. . . Rolling groove

52. . . End face

521. . . Crate

522. . . Through hole

60. . . Screw

61. . . Spiral channel

70. . . First return piece

71. . . Guide

711. . . Nail

712. . . Guide channel

72. . . Socket

721. . . Socket surface

722. . . First limit

73. . . First to the face

74. . . Second to the face

80. . . Second reflow member

81. . . Reflux section

811. . . Weekly

812. . . End face

813. . . Return channel

82. . . Positioning department

821. . . Locking hole

814. . . Second limit

X. . . Load path

A. . . Rolling element

Figure 1 is a schematic view of a first conventional reflow device.

Figure 2 is a schematic view of a second conventional reflow device.

Fig. 3 is a perspective exploded view showing the use of the ball screw reflow element of the present invention in combination with a ball screw.

Fig. 4 is a schematic exploded perspective view showing the ball screw reflow element of the present invention.

Fig. 5 is a schematic view showing the appearance of a three-dimensional structure of a ball screw reflow element of the present invention.

Fig. 6 is a first schematic view showing the assembly operation of the ball screw reflow element of the present invention in use.

Fig. 7 is a second schematic view showing the assembly operation of the ball screw reflow element of the present invention in use.

Fig. 8 is a schematic view showing the combined appearance of a ball screw reflow element of the present invention and a ball screw.

Fig. 9 is a sectional view showing the combination of a ball screw reflow element of the present invention and a ball screw.

Fig. 10 is a schematic view showing the partial structure relationship of the ball screw reflow element of the present invention combined with the nut.

70. . . First return piece

71. . . Guide

711. . . Nail

712. . . Guide channel

72. . . Socket

721. . . Socket surface

722. . . First limit

73. . . First to the face

74. . . Second to the face

80. . . Second reflow member

81. . . Reflux section

811. . . Weekly

812. . . End face

813. . . Return channel

82. . . Positioning department

821. . . Locking hole

814. . . Second limit

Claims (3)

A ball screw reflow element is mounted on a nut, and the nut is sleeved with a screw, the nut has a rolling groove therein, the screw has a spiral channel, the rolling groove and the spiral groove The reciprocating member includes a first end surface, and the nut has two end faces, each of the end faces is provided with a receiving groove, and the two slots are connected to each other to open a through hole, and the reflow element comprises: a first reflow The first returning member has a first abutting surface and a second abutting surface, and the guiding portion has a nail and a through-set a guiding channel, the socket has a set of joints, the sleeve surface is shaped into a U shape, and the sleeve surface is connected between the first abutment surface and the second abutment surface, the guide a guiding channel is inserted through the sleeve surface, the first reflow member is received in the cavity of the nut, and the second abutting surface of the first reflow member abuts against the receiving groove; and a second reflow a positioning portion integrally formed by a reflow section, the recirculation section being a cylindrical structure and having a circular arc shape a circumferential surface and an end surface, the reflow section is provided with a return passage extending through the circumferential surface and the end surface respectively, and a closed state is formed between the two ends of the return passage, and the second returning member passes through the reflow section a sleeve portion of the reflow member, and the circumferential surface of the reflow portion abuts against the sleeve surface of the first reflow member, and the positioning portion of the second reflow member abuts against the first portion of the first reflow member Abutting, the retracting section protrudes from the second abutting surface, and the end surface is inserted into the through hole of the nut, and the return passage of the second reflow member communicates with the guiding groove of the first reflow member Road. The ball screw reflow element according to claim 1, wherein the sleeve portion of the first reflow member is further provided with a plurality of first limiting portions, and the recirculation portion of the second reflow member is circumferentially And a plurality of second limiting portions, wherein the first limiting portion is a groove structure, the second limiting portion is a bump structure, and each of the second limiting portions is received in the first limiting portion to form a stopping limit . The ball screw reflow element according to claim 2, wherein the positioning portion of the second reflow member is provided with a locking hole, and further comprises a screw locking member for locking the second reflow member through the locking hole On the nut.