High speed transmission helical guide pair

Abstract

The application discloses a high-speed transmission screw guide rail pair, which comprises a screw rolling guide rail with a large lead angle formed by a linear rolling guide rail, and a screw rolling track of a slider of the linear rolling guide rail pair matched with the screw rolling guide rail, which becomes a screw rolling block assembly; two screw rolling block assemblies are installed on the screw rolling guide rail, and the two screw rolling block assemblies are fixedly installed on a flange through first fastening screws; the screw rolling guide rail track is an open double-end screw, and the two screw rolling block assemblies are installed at an angle of 180 degrees and fixedly installed on the flange through the fastening screws; when the screw rolling guide rail rotates, the two screw rolling block assemblies and the fixed flange move along the track of the screw rolling guide rail, so that the screw transmission function is realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to a kind of screw transmission structure, specifically relates to a high-speed spiral guide rail transmission pair with the same function of ball screw pair. BACKGROUND

[0002] In some automated production lines or high-speed moving and some special application fields, the moving speed requirement is very fast, reaching more than 5 meters per second. If the traditional ball screw pair is used for transmission, it is difficult to achieve. Because there are two ways to achieve high-speed transmission of ball screw pair: one is to increase the speed of screw. Two is to increase the lead of ball screw.

[0003] And the speed of the screw is limited by the DN value (screw diameter D x speed N), the speed cannot be increased unlimitedly (for long screw, it is also limited by the limit speed of the screw itself). Therefore, only the method of increasing the lead of the ball screw can be used to increase the transmission speed of the screw. Under the condition of the same load, the nut needs to be lengthened, that is, the lead is doubled, and the length of the nut is doubled. In addition, with the increase of the lead of the nut, the helix angle of the nut becomes larger. When the nut grows to a certain length, the grinding rod cannot enter the inner hole of the nut during grinding processing, and it cannot be processed. When the lead of the nut is more than 100 mm, the existing technology process is difficult to achieve. SUMMARY

[0004] The purpose of the present application is to provide a high-speed transmission spiral guide rail pair, which has stable operation, realizes large lead processing and solves the problem of high-speed transmission.

[0005] The technical scheme of the present application is a high-speed transmission spiral guide rail pair, characterized in that the linear rolling guide is made into a large lead spiral rolling guide, and the rolling way of the slider of the linear rolling guide pair is also made into a spiral rolling way matched with the spiral rolling guide to form a spiral rolling block assembly; two spiral rolling block assemblies are installed on the spiral rolling guide at 180 degrees, and are fixedly installed on a flange through a first fastening screw; the rolling way of the spiral rolling guide is an open double-end spiral, and when the spiral rolling guide rotates, the two spiral rolling block assemblies and the fixed flange move along the rolling way of the spiral rolling guide, thereby realizing the function of spiral transmission.

[0006] Further, the spiral rolling block assembly comprises a second fastening screw, a dust cover, a return device, a steel ball and a spiral rolling block; the return device is installed on both sides of the spiral rolling block to realize the reciprocating circulation of the steel ball, the dust cover is installed on the outside of the return device, and the return device and the dust cover are fixedly installed on the spiral rolling block through the second fastening screw. Two rolling grooves are processed on the spiral rolling block, and the steel ball is arranged in the rolling grooves and reciprocates through the return device installed on both sides.

[0007] The present application solves the problem of high-speed transmission. Currently, high-speed transmission elements usually adopt ball screw pairs for transmission. To achieve high-speed transmission, the lead of the screw rod must be increased. However, when the lead of the ball nut is greater than 80 mm, the helix angle is too large, the thread groove is too inclined during grinding, which causes interference between the grinding rod and the inner diameter of the nut, making it difficult to process, or even impossible to process.

[0008] The spiral rolling block raceway of the present application is open, so the grinding rod can be processed from the opening during processing, and is not limited by the helix angle. Therefore, the spiral guide rail transmission pair of the present application can have a lead of 300 mm or more, and a moving speed of 5 meters per second or more, thus solving the problem of high-speed transmission. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a spiral guide rail transmission pair overall structure diagram;

[0010] Figure 2 is a spiral guide rail transmission pair overall structure explosion diagram;

[0011] Figure 3 is a spiral guide rail transmission pair spiral rolling block assembly schematic diagram;

[0012] Figure 4 is a spiral guide rail transmission pair spiral rolling block assembly explosion diagram;

[0013] Figure 5 is a spiral rolling block raceway schematic diagram;

[0014] Figure 6 is a spiral guide rail raceway schematic diagram;

[0015] BRIEF DESCRIPTION OF DRAWINGS: 1-spiral rolling guide rail; 2-spiral rolling block assembly; 3-flange; 4-first fastening screw; 5-second fastening screw, 6-dust cover; 7-return device; 8-steel ball; 9-spiral rolling block; 10-spiral rolling block rolling groove; 11-spiral rolling guide rail raceway groove. DETAILED DESCRIPTION

[0016] The present application is combined with the features of ball screw pair and linear rolling guide pair, the linear rolling guide is made into large lead screw rolling guide, the rolling way of the slider of the linear rolling guide pair is also made into screw rolling way matching the screw rolling guide, becoming screw rolling block assembly 2, the reverser 7 and dust cover 6 are installed on both sides of the screw rolling block 9, the steel ball is installed between the screw rolling guide rolling way and the screw rolling block rolling way, the steel ball is circulated by the reverser installed on both sides.

[0017] As shown in Figure 1 , Figure 2 , the screw rolling guide 1 is installed with two screw rolling block assemblies 2, the two screw rolling block assemblies 2 are fixedly installed on the flange 3 through the first fastening screw 4.

[0018] The screw rolling block assembly 2 is shown in Figure 3 and Figure 4 , which includes the second fastening screw 5, the dust cover 6, the reverser 7, the steel ball 8 and the screw rolling block 9; the reverser 7 is installed on both sides of the screw rolling block, realizing the reciprocating circulation of the steel ball 8, the dust cover 6 is installed on the outside of the reverser 7, playing the role of dustproof sealing, the reverser 7 and the dust cover 6 are fixedly installed on the screw rolling block 9 through the second fastening screw 5, the screw rolling block 9 is processed with two rolling grooves 10, as shown in Figure 5 , the steel ball 8 is installed in the rolling groove 10.

[0019] The screw rolling guide adopts double-head design, and each head of the screw rolling guide is processed with two rolling grooves 11, as shown in Figure 6 .

[0020] When working, the steel ball 8 rolls and transmits axial force between the screw rolling guide rolling way and the screw rolling block rolling way, the steel ball 8 realizes reciprocating circulation through the reverser 7 installed on both sides. When the screw rolling guide rotates, the two screw rolling block assemblies and the fixed flange move along the rolling way of the screw rolling guide, thereby realizing the function of screw transmission.

Claims

1. A high-speed transmission helical guide pair, characterized in that: The linear rolling guide is made into a large-lead helical rolling guide (1), and the raceway of the slider of the linear rolling guide pair is also made into a helical raceway that matches the helical rolling guide, forming a helical rolling block assembly (2); two helical rolling block assemblies (2) are installed at 180 degrees on the helical rolling guide (1), and fixed on a flange (3) by the first fastening screw (4); the raceway of the helical rolling guide is an open double-headed helix. When the helical rolling guide (1) rotates, the two helical rolling block assemblies (2) and the fixed flange (3) move along the raceway of the helical rolling guide, thereby realizing the function of helical transmission; The spiral rolling block assembly (2) includes a second fastening screw (5), a dust cover (6), a return device (7), a steel ball (8), and a spiral rolling block (9). The return device (7) is installed on both sides of the spiral rolling block to realize the reciprocating circulation of the steel ball (8). The dust cover (6) is installed on the outside of the return device (7). The return device (7) and the dust cover (6) are fixedly installed on the spiral rolling block (9) by the second fastening screw (5). Two rolling grooves (10) are machined on the spiral rolling block (9). The steel ball (8) is installed in the rolling groove (10). The steel ball (8) reciprocates through the return devices (7) installed on both sides. The raceway of the spiral rolling guide is an open double-headed spiral. During processing, the grinding rod is processed from the open end, which is not limited by the helix angle. Therefore, the spiral guide transmission pair can achieve a lead of more than 300mm and a moving speed of more than 5 meters per second, which effectively solves the problem of high-speed transmission.

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