TW201616016A - Outer-loop strengthened bending tube structure of ball screw - Google Patents

Abstract

Provided is an outer-loop strengthened bending tube structure of ball screw, which includes a bending tube body, a positioning rib and a strengthened rib. The bending tube body is integrally formed into one piece including a joint terminal, an input/output terminal, a bending section connected between the joint terminal and the input/output terminal, and a reflowing hole penetrating through the joint terminal, the input/output terminal and the bending section. The terminal edge of the input/output terminal is provided with an oblique incision, and the oblique incision is protruded and extended with a guiding lip piece at a terminal edge close to the bending section. The positioning rib is formed by integrally protruding from the external side surface of the input/output terminal of the bending tube body. The strengthened rib is formed by integrally protruding from the external side surface of the guiding lip piece of the bending tube body and extending to the external side surface of the bending section. As a result, the present invention is able to achieve the functions of excellent overall strength, difficulty in breaking, difficulty in slanting, wear-resisting, low vibration, low and sweet sound, long usage lifetime, easy manufacture, time-saving, labor-saving, excellent precision and high assembling speed.

Description

Reinforced curved pipe structure outside the ball screw

The present invention relates to a ball screw, and more particularly to a ball-reinforced outer tube structure.

According to FIG. 1, the outer circulation type ball screw 1 mainly comprises a nut 2, a plurality of balls (not shown), at least one outer circulation elbow 3 and a screw 4, and the screw 4 penetrates. In the nut 2, at least one spiral rolling path 5 is provided on the inner circumferential surface of the nut 2 and the outer circumferential surface of the screw 4 for the balls to roll along the rolling path 5, the outer The circulation elbow 3 is inserted outside the nut 2 so that the outer circulation elbow 3 communicates with the beginning and the end of the rolling path 5, so that the balls can pass the outer circulation elbow 3 to the rolling path. A continuous reflux cycle is carried out within 5.

However, as shown in FIG. 2, the outer circulation bend 3 is generally U-shaped, and a return hole 6 communicating the two ends is formed in the tube, and one end is formed at each end of the outer circulation bend 3 A slanting slit 7 is formed at the inner end of the slanting slit 7 to protrude a guide lip 8 for guiding the ball in and out.

However, since the shape of the outer circulation elbow 3 has to be rolled and rolled, only the stainless steel or the structural steel can be used, so that the strength is limited; The wall thickness of the outer circulation elbow 3 is uniform, so the strength at the position of the guiding lip 8 is weak, and under the impact of the rolling ball rolling, cracking, severe skewing, abrasion, large vibration, and sharp sound are often occurred. Piercing and short service life. Moreover, the process of the outer circulation elbow 3 is not only cumbersome and labor intensive, but also has poor precision, and requires manual grinding to make the assembly speed slower.

In view of this, in order to improve the prior art, the conventional outer circulation elbow has poor overall strength, is prone to fracture, severely skewed, worn, vibrated, sharp and harsh, and has a short service life, and the process is rather cumbersome and labor-intensive. The invention has the advantages of low cost, low precision, and need to be manually ground to make the assembly speed slower. Therefore, the present invention provides a ball screw external circulation strengthening curved pipe structure, comprising a curved pipe body, a positioning rib and a reinforcing rib; The elbow body system is integrally formed, the elbow body has an engaging end, an inlet and outlet end, a curved section connected between the joint end and the inlet and outlet ends, and a through end, the inlet and outlet ends, and the a return hole of the curved section, the end edge of the inlet and outlet end has a oblique cut, and the oblique cut is adjacent to the end edge of the curved section and protrudes with a guiding lip, the positioning rib is from the bending body The outer side of the outlet end is integrally formed, and the reinforcing rib is integrally protruded from the outer side surface of the guiding lip of the curved body and extends to the outer side of the curved section; thereby, the invention can be Preferably strength, easy to break and difficult to skew, abrasion, vibration, bass voice, long life, simple process, saving time and labor costs, good precision and fast speed of assembly and other effects.

"Knowledge"

1‧‧‧Ball screw

2‧‧‧ nuts

3‧‧‧External circulation elbow

4‧‧‧ screw

5‧‧‧ rolling path

6‧‧‧Return hole

7‧‧‧ oblique incision

8‧‧‧ Guide lip

"this invention"

100‧‧‧Bead screw external circulation strengthening elbow structure

10‧‧‧Bend body

11‧‧‧ joint end

111‧‧‧ stepped incision

12‧‧‧Import and export

121‧‧‧ oblique incision

122‧‧‧Leading lip

13‧‧‧Bend section

14‧‧‧Reflow hole

20‧‧‧ positioning ribs

30‧‧‧ Strengthening ribs

91‧‧‧ Nuts

911‧‧‧ jack

912‧‧‧Return path

92‧‧‧Fixed blocks

93‧‧‧ balls

Fig. 1 is a structural combination diagram of a conventional ball screw.

Figure 2 is a perspective view of a conventional outer loop elbow.

Figure 3 is a perspective view of a preferred embodiment of the present invention.

Fig. 4 is a view showing the state of use of the embodiment shown in Fig. 3.

Fig. 5 is a schematic view showing the assembly of the embodiment shown in Fig. 3.

Figure 6 is a schematic cross-sectional view of the embodiment shown in Figure 3.

In order to enable the reviewing committee to have a better understanding and recognition of the features and features of the present invention, the following preferred embodiments are illustrated as follows: Referring to Figures 3 through 6, a preferred embodiment of the present invention is preferred. The ball screw external circulation strengthening pipe structure 100 provided by the embodiment is integrally made of special alloy steel or other high-strength steel by precision casting or metal injection molding (MIM), and mainly comprises a bent pipe body. 10. A positioning rib 20 and a reinforcing rib 30: Referring to FIG. 3, the elbow body 10 has an engaging end 11, an inlet and outlet end 12, and a connection between the engaging end 11 and the inlet and outlet end 12. a curved section 13 and a return hole 14 extending through the joint end 11, the inlet and outlet end 12 and the curved section 13, the end edge of the joint end 11 has a stepped slit 111, and the end edge of the inlet and outlet end 12 has a The oblique slit 121 is adjacent to the end edge of the curved section 13 and has a guiding lip 122 protruding therefrom.

Referring to FIG. 3, the positioning rib 20 is integrally formed from the outer side surface of the inlet and outlet end 12 of the curved pipe body 10, and has a circular arc shape in a straight strip shape.

Referring to FIG. 3, the reinforcing rib 30 is integrally formed from the outer side surface of the guiding lip 122 of the curved body 10 and extends to the outer side of the curved section 13. Section.

Therefore, the above description is a description of the components of the ball screw outer circulation strengthening pipe structure 100 and the assembly manner thereof according to a preferred embodiment of the present invention, and then the use characteristics thereof are as follows: First, the present invention can be The inlet and outlet end 12 of the invented ball screw outer circulation reinforcing pipe structure 100 is inserted into the corresponding shape of the socket 911 on the outer side of a nut 91 (as shown in FIG. 4), and then another outer cycle of the invention is taken. The curved pipe structure 100 is strengthened, and the inlet and outlet ends thereof are also inserted into the other insertion hole of the corresponding shape formed on the outer side of the nut 91, so that the stepped slit 111 on the outer circulation reinforcing curved pipe structure 100 of the two inventions is made. Performing a butt fit (as shown in FIG. 5), and then fixing a fixing block 92 to the nut 91 and pressing against the ball screw outer circulation reinforcing pipe structure 100 of the present invention to fix the present invention to the On the nut 91, the ball 93 rolling along the return path 912 in the nut 91 can be continuously recirculated by the return hole 14 of the present invention (as shown in Fig. 6).

Therefore, due to the design of the present invention, a special alloy steel material or other high-strength steel grade can be integrally formed by precision casting or metal injection molding (MIM), so that the overall strength and wear resistance are better, and the size is improved. Accurate precision, assembly No need to manually grind, which can greatly reduce assembly time and labor costs.

In addition, since the outer side of the inlet and outlet end 12 of the elbow body 10 of the present invention has an integrally protruding positioning rib 20; not only the angle setting during assembly can be reduced, but also the positioning effect is better, so as to reduce the occurrence of sloshing. .

Secondly, in the present invention, the outer side of the guiding lip 122 of the elbow body 10 has a reinforcing rib 30 integrally protruding and extending to the curved section 13; therefore, not only can bear the greater impact force when the ball is recirculated and recirculated. In this way, the problem that the conventional guiding lip piece is often broken, severely skewed, worn and has a short service life is improved, and the effect of less vibration, lower sound and pleasant ear is obtained.

Furthermore, in the present invention, when the stepped slit 111 of the curved body 10 is docked with another stepped slit of the present invention, not only the effect of rapid docking but also the step of generating a step can be effectively reduced. The rolling of the balls can be smoother.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. All of the related art in the art will be equally changed according to the present invention. The scope of coverage.

100‧‧‧Bead screw external circulation strengthening elbow structure

10‧‧‧Bend body

11‧‧‧ joint end

111‧‧‧ stepped incision

12‧‧‧Import and export

121‧‧‧ oblique incision

122‧‧‧Leading lip

13‧‧‧Bend section

14‧‧‧Reflow hole

20‧‧‧ positioning ribs

30‧‧‧ Strengthening ribs

Claims (9)

The invention relates to a ball screw external circulation strengthening curved pipe structure, which mainly comprises: an elbow body integrally formed, the elbow body has an engaging end, an inlet and outlet end, a connecting end and the inlet and outlet a curved section between the end and a return hole extending through the joint end, the inlet and outlet ends and the curved section, the end edge of the inlet and outlet ends has a slanted cut, and the oblique cut is adjacent to the end edge of the curved section and protrudes There is a guiding lip; a reinforcing rib is integrally formed from the outer side surface of the guiding lip of the curved body and extends to the outer side of the curved section. The ball screw outer circulation reinforcing elbow structure according to the first aspect of the patent application, wherein the end edge of the joint end of the elbow body has a stepped slit. The ball screw external circulation strengthening bending pipe structure according to the first aspect of the patent application scope further includes a positioning rib, wherein the positioning rib is integrally protruded from an outer side surface of the inlet and outlet ends of the bending pipe body. According to the third aspect of the patent application, the ball screw external circulation strengthening pipe structure is adopted, wherein the positioning rib is a straight strip shape and has a circular arc section. According to the third aspect of the patent application, the ball screw external circulation strengthening bending pipe structure is adopted, wherein the bending pipe body, the reinforcing ribs and the positioning rib are integrally formed by precision casting. The ball screw external circulation reinforcing elbow structure according to the third aspect of the patent application scope, wherein the elbow body, the reinforcing rib and the positioning rib are integrally formed by metal injection molding. The ball-screw outer circulation reinforcing elbow structure according to the first aspect of the patent application scope, wherein the reinforcing rib has a straight strip shape and a circular arc section. The ball screw external circulation reinforcing elbow structure according to the first aspect of the patent application scope, wherein the elbow body and the reinforcing rib are integrally formed by precision casting. The ball screw external circulation reinforcing elbow structure according to the first aspect of the patent application scope, wherein the elbow body and the reinforcing rib are integrally formed by metal injection molding.