Lathe screw rod spring pre-tensioning device

Abstract

The utility model relates to a lathe screw spring pretensioning device, which belongs to the technical field of lathe screws and comprises a lower traction table, two-way adjusting screw rods are rotatably connected to four corners of the top of the lower traction table, adjusting gears are fixedly mounted on the outer surfaces of the centers of the two-way adjusting screw rods, adjusting fluted discs are meshed outside the adjusting gears, and the adjusting fluted discs are meshed with the adjusting fluted discs. An upper traction table is arranged at the top of the two-way adjusting screw rod; and fixing mechanisms used for clamping the upper end and the lower end of the screw rod are arranged in the lower traction table and the upper traction table correspondingly. The traction device has the beneficial effects that the upper end and the lower end of the screw rod are respectively fixed by the lower traction table and the upper traction table in the use process through the arrangement of the two-way adjusting screw rod, and then the distance between the lower traction table and the upper traction table is fixed by the two-way adjusting screw rod according to the length of the screw rod in the use process; and therefore, the problem of deformation of the screw rod in the use process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe screw rods, in particular to a lathe screw rod spring pre-tensioning device. Background Art

[0002] The ball screw is a key component of the CNC machine tool feed system. When the ball screw is working, the frictional heat generated during the movement of the bearing, screw, nut and other components will cause the temperature to rise, and the screw will elongate along its axial direction. However, since both ends of the screw are fixed and cannot elongate, the screw will bend and deform in this case, affecting the transmission of the screw, thereby affecting the positioning accuracy of the feed system, and further affecting the processing accuracy of the parts. Therefore, during use, the lathe screw needs to be limited and adjusted through a pre-tensioning device to avoid deformation.

[0003] Application number: CN202220799271.8; discloses a spring pre-tensioning device for the tail end of a machine tool screw, the key points of its technical solution are: it includes a ball screw, a bearing, a bearing seat, a nut and an end cover, the bearing sleeve is arranged at the tail end of the ball screw, the tail end of the ball screw passes through the bearing and is locked by the nut, the bearing seat sleeve is arranged on the peripheral side of the bearing, one end of the bearing seat close to the nut is fixedly connected to the end cover, one end of the bearing seat close to the ball screw shaft extends radially toward the side wall of the ball screw so that the bearing seat, the bearing and the ball screw form an accommodating space, an elastic member is arranged in the accommodating space, and the two ends of the elastic member respectively abut the bearing seat and the bearing along the axial direction of the ball screw. The utility model provides an oil channel on the bearing seat on the basis of providing pre-tensioning force by the elastic part in the existing design to avoid thermal deformation of the ball screw. Lubricating oil is injected through the oil channel to lubricate the bearing, ball screw and other components to reduce friction between the components, which not only reduces the generation of heat but also improves the stability of the connection between the components and the transmission accuracy, thereby improving the processing accuracy.

[0004] The ball screws in the above-mentioned comparative documents are usually only capable of fixing screws of fixed models when in use, so it is difficult to make corresponding adjustments according to changes in the screw model, which limits the scope of use of the equipment. Therefore, there are limitations in use. To address the above problems, we have introduced a lathe screw spring pre-tensioning device. Utility Model Content

[0005] The utility model aims to provide a lathe screw spring pre-tensioning device to solve the problems raised in the above background technology.

[0006] The technical solution of the utility model is: comprising a lower traction platform, the four corners of the top of the lower traction platform are rotatably connected with a two-way adjustment screw rod, the outer surface of the center of the two-way adjustment screw rod is fixedly installed with an adjustment gear, the outer part of the adjustment gear is meshed with an adjustment toothed disc, and the top of the two-way adjustment screw rod is provided with an upper traction platform;

[0007] The lower traction platform and the upper traction platform are respectively provided with fixing mechanisms for clamping the upper and lower ends of the screw;

[0008] An auxiliary mechanism for ensuring smooth rotation of the screw rod is arranged at the center of the opposite side of the lower traction platform and the upper traction platform.

[0009] Furthermore, the outer surfaces of the upper and lower ends of the bidirectional adjustment screw rod close to the center of the adjustment gear are fixedly connected to limit plates, and the position of the adjustment gear disc can be fixed by the limit plates.

[0010] Furthermore, the fixing mechanism includes an installation groove, which is opened inside the lower traction platform and the upper traction platform, and a rotating table is fixedly installed inside the installation groove. A rotating groove is opened inside the rotating platform, and a rotating bar is embedded in the rotating groove. A chuck is fixedly installed on one side of the rotating bar close to the center of the lower traction platform, and the screw can be fixedly clamped by the chuck.

[0011] Furthermore, the chuck inside the lower traction platform is arranged in an arc shape, and the upper traction platform inside the upper traction platform is arranged in a hexagonal shape, and the arc-shaped and hexagonal settings can ensure fixation from both ends of the screw.

[0012] Further, both ends of the opposite side of the chuck are fixedly installed with adjustment blocks, the opposite side of the adjustment block is rotatably connected with a bidirectional movable screw, the outside of the center of the bidirectional movable screw is fixedly installed with an adjustment bevel gear, one end of the adjustment bevel gear is meshed with a rotating bevel gear, and the side of the rotating bevel gear away from the center of the lower traction platform is fixedly installed with an adjustment rod. The distance between the chucks can be adjusted by the meshing structure of the rotating bevel gear and the adjusting bevel gear, so as to meet the fixation of screws of different models.

[0013] Furthermore, the auxiliary mechanism includes an auxiliary plate, the auxiliary plate is fixedly connected to the center of the lower traction platform and the upper traction platform on the opposite side, a rotating plate is fixedly installed inside the auxiliary plate, and a rubber plate is fixedly installed on one side of the rotating plate close to the center. The screw can be wrapped and fixed from the outside through the rubber plate.

[0014] Furthermore, limiting rings are fixedly installed on the outer sides near the center of the upper and lower ends of the rotating disk, and limiting grooves are provided on the upper and lower ends near the center of the auxiliary disk. Balls are embedded in the limiting grooves at equal intervals. The action of the balls can make the rotating disk rotate more smoothly, thereby ensuring smoother rotation of the screw.

[0015] First, the utility model, through the setting of the bidirectional adjustment screw rod, during use, the upper and lower ends of the screw rod are respectively fixed by the lower traction platform and the upper traction platform, and then when in use, the distance between the lower traction platform and the upper traction platform is fixed by the bidirectional adjustment screw rod according to the length of the screw rod, thereby avoiding the problem of deformation of the screw rod during use.

[0016] Secondly: The utility model, through the coordinated use of the fixing mechanism and the internal parts, during use, the screw is fixed and clamped by the chuck from the upper and lower ends of the screw respectively, and when clamping, the distance between the chucks is adjusted by moving the lead screw in both directions according to the model of the screw, so that the chuck can fix screws of different models, thereby expanding the practical scope of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the front view three-dimensional structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the auxiliary mechanism structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the upper traction platform of the utility model;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the lower traction platform of the utility model.

[0022] Explanation of the accompanying reference numerals: 1. lower traction platform; 2. two-way adjustment screw rod; 3. adjustment gear; 4. adjustment gear plate; 5. upper traction platform; 6. limit plate; 7. rotating platform; 8. rotating bar; 9. chuck; 10. adjustment block; 11. two-way movable screw rod; 12. adjustment bevel gear; 13. rotating bevel gear; 14. adjustment rod; 15. auxiliary disk; 16. rotating disk; 17. rubber disk; 18. limit ring; 19. ball bearing. DETAILED DESCRIPTION

[0023] The following will be combined with the attached Figures 1 to 4The utility model is described in detail, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides a lathe screw spring pre-tensioning device through improvement, such as Figure 1-Figure 4 As shown, it includes a lower traction platform 1, and the four corners of the top of the lower traction platform 1 are rotatably connected with a two-way adjustment screw rod 2, and the outer surface of the center of the two-way adjustment screw rod 2 is fixedly installed with an adjustment gear 3, and the outer surface of the adjustment gear 3 is meshed with an adjustment gear plate 4, and the top of the two-way adjustment screw rod 2 is provided with an upper traction platform 5; the lower traction platform 1 and the upper traction platform 5 are respectively provided with a fixing mechanism for clamping the upper and lower ends of the screw rod; the center of the opposite side of the lower traction platform 1 and the upper traction platform 5 is provided with an auxiliary mechanism for ensuring the smooth rotation of the screw rod. The outer surface of the upper and lower ends of the two-way adjustment screw rod 2 close to the center of the adjustment gear 3 is fixedly connected with a limit plate 6.

[0025] In this embodiment: during use, the distance between the lower traction platform 1 and the upper traction platform 5 is adjusted according to the length of the screw that needs to be fixed, and the distance between the lower traction platform 1 and the upper traction platform 5 is adjusted by adjusting the meshing structure between the toothed plate 4 and the adjusting gear 3. At the same time, by fixing the distance between the lower traction platform 1 and the upper traction platform 5, the screw can be limited to avoid deformation.

[0026] In the first implementation scheme, when fixing the screw rod, it is necessary to fix it from both ends of the screw rod respectively. The specific operation is as follows:

[0027] like Figure 1 and Figure 3 as well as Figure 4 As shown, the fixing mechanism includes a mounting groove, which is provided inside the lower traction platform 1 and the upper traction platform 5, and a rotating platform 7 is fixedly installed inside the mounting groove. A rotating groove is provided inside the rotating platform 7, and a rotating bar 8 is embedded inside the rotating groove. A chuck 9 is fixedly installed on the side of the rotating bar 8 close to the center of the lower traction platform 1. The chuck 9 inside the lower traction platform 1 is arranged in an arc shape, and the upper traction platform 5 inside the upper traction platform 5 is arranged in a hexagonal shape. Adjustment blocks 10 are fixedly installed on both ends of the opposite side of the chuck 9, and a bidirectional movable screw rod 11 is rotatably connected to the opposite side of the adjustment block 10, and an adjustment bevel gear 12 is fixedly installed on the outside of the center of the bidirectional movable screw rod 11, and a rotating bevel gear 13 is meshed at one end of the adjustment bevel gear 12, and an adjustment rod 14 is fixedly installed on the side of the rotating bevel gear 13 away from the center of the lower traction platform 1;

[0028] In this embodiment: one end of the screw is inserted into the interior of the upper traction platform 5, and the other end is inserted into the interior of the lower traction platform 1. According to the size and model of the screw, the distance of the chuck 9 is adjusted, and one end of the adjusting rod 14 is respectively inserted into the interior of the lower traction platform 1 and the upper traction platform 5. By adjusting the meshing structure between the bevel gear 12 and the rotating bevel gear 13, the bidirectional movable screw 11 is driven to rotate, and the distance between the adjusting block 10 and the chuck 9 is adjusted by the bidirectional movable screw 11. Since the chuck 9 inside the lower traction platform 1 is set to an arc shape, and the upper traction platform 5 inside the upper traction platform 5 is set to a hexagonal shape, after being used together, screws of different models can be clamped and fixed.

[0029] In the first implementation scheme, during the use of the screw, it is easy to be affected by external resistance, resulting in rotational wear. The specific operation is as follows:

[0030] like Figure 1 and Figure 2 As shown, the auxiliary mechanism includes an auxiliary disk 15, which is fixedly connected to the center of the opposite side of the lower traction platform 1 and the upper traction platform 5. A rotating disk 16 is fixedly installed inside the auxiliary disk 15, and a rubber disk 17 is fixedly installed on the side of the rotating disk 16 close to the center. Limiting rings 18 are fixedly installed on the outer side of the upper and lower ends of the rotating disk 16 close to the center, and limiting grooves are provided on the upper and lower ends of the auxiliary disk 15 close to the center, and balls 19 are embedded in the limiting grooves at equal distances.

[0031] In this embodiment: the rubber disc 17 covers the outside of the screw, and through the elastic properties of the rubber disc 17 itself, the inner surface of the rubber disc 17 can be closely fitted with the screw. When the screw rotates, the auxiliary disc 15 is driven to rotate by the rubber disc 17, and the auxiliary disc 15 can effectively reduce the resistance encountered during rotation under the action of the ball 19 and the limit ring 18, thereby reducing damage to the screw.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lathe screw spring pre-tensioning device, characterized in that: It comprises a lower traction platform (1), the four corners of the top of the lower traction platform (1) are rotatably connected to a bidirectional adjustment screw rod (2), the outer surface of the center of the bidirectional adjustment screw rod (2) is fixedly mounted with an adjustment gear (3), the outer part of the adjustment gear (3) is meshed with an adjustment toothed disc (4), and the top of the bidirectional adjustment screw rod (2) is provided with an upper traction platform (5); The lower traction platform (1) and the upper traction platform (5) are respectively provided with fixing mechanisms for clamping the upper and lower ends of the screw rod; An auxiliary mechanism for ensuring smooth rotation of the screw rod is arranged at the center of the opposite side of the lower traction platform (1) and the upper traction platform (5).

2. A lathe screw spring pre-tensioning device according to claim 1, characterized in that: The outer surfaces of the upper and lower ends of the bidirectional adjustment screw rod (2) close to the center of the adjustment gear (3) are fixedly connected to the limiting plates (6).

3. The lathe screw spring pre-tensioning device according to claim 1, characterized in that: The fixing mechanism comprises a mounting groove, the mounting groove is arranged inside the lower traction platform (1) and the upper traction platform (5), a rotating platform (7) is fixedly installed inside the mounting groove, a rotating groove is arranged inside the rotating platform (7), a rotating bar (8) is embedded inside the rotating groove, and a chuck (9) is fixedly installed on one side of the rotating bar (8) close to the center of the lower traction platform (1).

4. The lathe screw spring pre-tensioning device according to claim 1, characterized in that: The clamp (9) inside the lower traction platform (1) is arranged in an arc shape, and the upper traction platform (5) inside the upper traction platform (5) is arranged in a hexagonal shape.

5. The lathe screw spring pre-tensioning device according to claim 3, characterized in that: Adjustment blocks (10) are fixedly mounted at both ends of the opposite side of the chuck (9); a bidirectional movable lead screw (11) is rotatably connected to the opposite side of the adjustment block (10); an adjustment bevel gear (12) is fixedly mounted outside the center of the bidirectional movable lead screw (11); one end of the adjustment bevel gear (12) is meshed with a rotating bevel gear (13); an adjustment rod (14) is fixedly mounted on the side of the rotating bevel gear (13) away from the center of the lower traction platform (1).

6. The lathe screw spring pre-tensioning device according to claim 1, characterized in that: The auxiliary mechanism comprises an auxiliary disk (15), the auxiliary disk (15) being fixedly connected to the center of one side opposite to the lower traction platform (1) and the upper traction platform (5), a rotating disk (16) being fixedly mounted inside the auxiliary disk (15), and a rubber disk (17) being fixedly mounted on one side of the rotating disk (16) close to the center.

7. A lathe screw spring pre-tensioning device according to claim 6, characterized in that: Limiting rings (18) are fixedly mounted on the outer sides of the upper and lower ends of the rotating disk (16) near the center, and limiting grooves are provided on the upper and lower ends of the inner side of the auxiliary disk (15) near the center, and balls (19) are embedded in the limiting grooves at equal intervals.

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