Flexible connection device for a ball screw pair

Abstract

The application relates to a flexible connecting device of a ball screw pair, belonging to the ball screw field, which comprises a rack, a connecting rod and a guide square rod, both ends of the guide square rod are sleeved with adjusting blocks, the adjusting blocks are provided with turnover assemblies for adjusting the overturning angles of the guide square rods, the turnover assemblies and the adjusting blocks are connected through rotating assemblies, the rotating assemblies are used for adjusting the overturning angles of the guide square rods, the turnover assemblies are provided with fixing assemblies for adjusting and fixing the overturning angles of the guide square rods, the rack is provided with adjusting assemblies for adjusting the positions of the adjusting blocks, the adjusting assemblies correspond to the adjusting blocks one by one, and the connecting rod is connected with the guide square rod through rolling pieces. The application has the effects of reducing the track deviation of a screw nut and causing mechanism abrasion, and prolonging the service life of the ball screw pair.

Description

Technical Field

[0001] This application relates to the field of ball screws, and more particularly to a flexible connection device for ball screw pairs. Background Technology

[0002] A ball screw assembly is a helical transmission element with steel balls as rolling elements between a screw and a nut. It can convert rotary motion into linear motion, or vice versa. Therefore, the ball screw assembly is both a transmission component and a component that converts linear and rotary motion into each other. Ball screw assemblies have advantages such as high precision, micro-feed, zero backlash, and high rigidity, and are therefore widely used in machine tools.

[0003] When the nut on the ball screw moves, it usually needs to be guided to ensure that the nut can slide stably. Traditionally, the nut is guided mainly by a guide rod, and the guide rod and the nut are connected by a connecting rod. The connecting rod slides on the guide rod. Due to manufacturing and installation errors, the axis of the ball screw is tilted from the trajectory of the connecting rod sliding on the guide rod. This causes the pressure of the nut on the balls to increase when it slides, resulting in rapid wear of the mechanism and reducing the service life of the ball screw pair. Summary of the Invention

[0004] To address the problem of rapid wear and reduced service life of ball screw pairs, this application provides a flexible connection device for ball screw pairs.

[0005] The flexible connection device for a ball screw assembly provided in this application adopts the following technical solution:

[0006] A flexible connection device for a ball screw assembly includes a frame, a connecting rod, and a guide rod. Adjusting blocks are fitted at both ends of the guide rod. Each adjusting block has a flipping component for adjusting the tilting angle of the guide rod. The flipping component is connected to the adjusting block via a rotating component, which adjusts the tilting angle of the guide rod. The flipping component has a fixing component for adjusting and fixing the tilting angle of the guide rod. The frame has an adjusting component for adjusting the position of the adjusting blocks. Each adjusting component corresponds to one adjusting block. The connecting rod is connected to the guide rod via a rolling element.

[0007] By adopting the above technical solution, when adjusting the ball screw assembly, the height and position of both ends of the guide rod are adjusted by the adjustment component. When the heights of the two ends of the guide rod are inconsistent, the guide rod drives the adjustment block to flip under the action of the flipping component, thereby allowing the guide rod to tilt. Then, the lateral flipping angle of the guide rod is adjusted by the rotation component. Then, the nut slides on the guide rod through the connecting rod and the rolling element, thereby ensuring that the sliding trajectory of the rolling element on the guide rod is parallel to the sliding trajectory of the nut on the screw, thereby reducing the wear caused by the trajectory deviation between the two and improving the service life of the ball screw assembly.

[0008] In one specific implementation, the flipping assembly includes a rotating ring and a rotating shaft, the rotating shaft being arranged radially along the rotating ring, and the rotating shaft being inserted into the adjusting block and rotatably configured with the adjusting block.

[0009] By adopting the above technical solution, when adjusting the guide rod, the adjusting component adjusts the different heights at both ends of the guide rod to adapt to the lead screw. At this time, the guide rod drives the rotating ring to rotate around the rotating axis through the adjusting block and the rotating component, thereby realizing the tilting of the guide rod in the length direction.

[0010] In one specific implementation, the rotating assembly includes an arc plate, the rotating ring is rotatably disposed with the adjusting block, the rotating ring is provided with a rotating groove for the arc plate to be inserted, the side wall of the arc plate abuts against and slides against the groove wall of the rotating groove, and the guide rod is fixedly disposed with the arc plate.

[0011] By adopting the above technical solution, when adjusting the lateral tilt angle of the guide rod, first rotate the fixing component, the fixing component drives the arc plate to rotate along the rotating groove, and the guide rod rotates with the arc plate, thereby realizing the adjustment of the lateral tilt angle of the guide rod.

[0012] In one specific implementation, a toothed ring is provided on the peripheral sidewall of the arc-shaped plate, and an adjusting shaft is rotatably provided on the rotating ring. The adjusting shaft is provided with a drive gear for meshing with the toothed ring.

[0013] By adopting the above technical solution, when adjusting the lateral flipping angle of the guide rod, the operator rotates the adjustment shaft, which drives the drive gear to rotate. The drive gear, through meshing with the gear ring, drives the arc plate to rotate, thereby adjusting the lateral flipping angle of the guide rod and improving the convenience of adjusting the lateral flipping angle.

[0014] In one specific implementation, the fixing assembly includes a fixing sleeve, a fixing screw, and an extrusion member. The fixing sleeve is fixedly mounted on the rotating ring. The adjusting shaft is inserted into the fixing sleeve and rotated. The fixing screw is inserted into the adjusting shaft and threadedly connected. The axis of the fixing screw is collinear with the axis of the adjusting shaft. The fixing sleeve is provided with a limiting groove. The fixing screw is provided with a limiting block for sliding within the limiting groove. The extrusion member is used to restrict the extension and retraction of the fixing screw.

[0015] By adopting the above technical solution, when the lateral rotation angle of the guide rod is adjusted, the adjusting shaft drives the fixing screw to rotate inside the fixing sleeve. At the same time, with the limiting block and the limiting groove engaged, the fixing screw slides along the axial direction of the fixing sleeve. At this time, the fixing screw extends or retracts into the adjusting shaft. When the lateral rotation angle of the guide rod is adjusted, the length of the fixing screw extending out of the adjusting shaft is constant. Then, the pressing component restricts the change in the length of the fixing screw extending out of the adjusting shaft, thereby limiting the rotation of the adjusting shaft. This achieves the fixation of the lateral rotation angle of the guide rod and improves the stability of the guide rod during operation.

[0016] In one specific implementation, the extrusion component includes an extrusion cylinder and an extrusion ring. The extrusion cylinder is provided with an extrusion block for extruding the fixed screw. The extrusion cylinder is threadedly connected to the fixed sleeve. The extrusion ring is sleeved on the fixed sleeve and threadedly connected to the fixed sleeve. The fixed sleeve is provided with a sliding through hole. The extrusion ring is provided with a fixing block for extruding the limiting block. The fixing block passes through the sliding through hole and extends into the fixed sleeve.

[0017] By adopting the above technical solution, when restricting the fixing screw, the extrusion cylinder is first screwed onto the fixing sleeve, so that the extrusion block squeezes the fixing screw. Then, the extrusion ring is screwed on, and the extrusion ring pushes the fixing block to slide along the sliding through hole. Then, the fixing block squeezes the limiting block, thereby realizing the sliding of the fixing screw along the axial direction of the fixing sleeve and improving the stability of the guide square rod.

[0018] In one specific implementation, the adjusting assembly includes a lateral adjusting screw, the frame is provided with an adjusting groove for the adjusting block to slide in, the lateral adjusting screw is inserted into the side wall of the adjusting groove and rotatably disposed with the side wall of the adjusting groove, a support plate is provided on the lateral adjusting screw, the lateral adjusting screw passes through the support plate and is threadedly connected to the support plate, and the adjusting block slides with the support plate.

[0019] By adopting the above technical solution, when adjusting the position of the adjusting plate, first rotate the horizontal adjusting screw, the horizontal adjusting screw drives the support plate to slide horizontally, and the support plate drives the adjusting block to slide, thereby realizing the horizontal position adjustment of the adjusting block. At the same time, when the horizontal adjusting screw stops rotating, the support plate remains stationary due to the self-locking of the thread.

[0020] In one specific implementation, the adjusting assembly further includes a vertical adjusting screw that passes through the adjusting block and is threadedly connected to it. Slide grooves are provided on opposite sidewalls of the adjusting groove. A slider for sliding within the slide groove is provided on the frame. Both ends of the vertical adjusting screw are inserted into the slider on the same side. The vertical adjusting screw and the slider are rotatably configured. A guide groove is provided on the support plate, and the guide groove is arranged perpendicular to the sliding direction of the support plate. A slide bar for sliding within the guide groove is provided on the adjusting block.

[0021] By adopting the above technical solution, when adjusting the vertical position of the adjusting block, the vertical adjusting screw is rotated, and the adjusting block slides vertically along the vertical direction with the vertical adjusting screw. At this time, the slide bar slides along the guide groove, thereby realizing the adjustment of the vertical position of the adjusting block.

[0022] In one specific implementation, the rolling element includes two sets of rollers and a movable bracket. The movable bracket is connected to the connecting rod, and the guide rod is located between the two sets of rollers. Each set of rollers is rotatably equipped with a support frame, and the movable bracket is equipped with an adjusting element for pushing the two support frames closer to each other.

[0023] By adopting the above technical solution, when the nut slides along the lead screw, the nut drives two sets of rollers to slide along the guide rod through the connecting rod, the moving bracket and the support frame. When the axis of the lead screw is inclined to the guide rod, the nut drives the rollers to slide laterally along the guide rod, so as to adapt to the inclination of the axis of the lead screw to the guide rod, thereby effectively avoiding large wear of the ball screw pair.

[0024] In one specific implementation, the adjusting component includes an adjusting screw, which corresponds one-to-one with the movable bracket. The adjusting screw is threadedly connected to the movable bracket, and the movable bracket is provided with a slot. The adjusting screw is provided with a plate for rotating within the slot.

[0025] By adopting the above technical solution, when installing the rollers, rotating the adjusting screw causes the support frame to slide through the engagement of the clamping plate and the clamping groove, thereby adjusting the pressure of the two sets of rollers on the guide rod. This improves the convenience of roller adjustment while increasing the stability of the rollers sliding along the guide rod.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. When adjusting the ball screw assembly, the height and position of both ends of the guide rod are adjusted by the adjustment component. When the heights of the two ends of the guide rod are inconsistent, the guide rod drives the adjustment block to flip under the action of the flipping component, thereby tilting the guide rod. Then, the lateral flipping angle of the guide rod is adjusted by the rotation component. Then, the nut slides on the guide rod through the connecting rod and the rolling element. By adjusting the guide rod, the sliding trajectory of the rolling element on the guide rod is made parallel to the sliding trajectory of the nut on the screw, thereby reducing the offset between the two trajectories and causing wear of the mechanism, thus improving the service life of the ball screw assembly.

[0028] 2. When adjusting the guide rod, first rotate the horizontal adjusting screw and the vertical adjusting screw to adjust the height and position of both ends of the guide rod. When the heights of the two ends of the guide rod are inconsistent, the guide rod drives the rotating ring to rotate around the rotating shaft, thereby making the position of the guide rod and the lead screw consistent and reducing the positional deviation between the guide rod and the lead screw. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the flexible connection device of the ball screw pair according to an embodiment of this application.

[0030] Figure 2 This is a structural diagram used to illustrate the adjustment components.

[0031] Figure 3 It is along Figure 2 A cross-sectional view along the BB line.

[0032] Figure 4 It is used to display the exploded view of the structure of the arc plate.

[0033] Figure 5 yes Figure 3 Enlarged view of section C.

[0034] Figure 6 This is a structural diagram used to illustrate the extruded part.

[0035] Figure 7 yes Figure 1 Enlarged view of section A.

[0036] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Adjustment space; 21. Lead screw; 22. Nut; 23. Connecting rod; 3. Guide square rod; 31. Adjusting block; 4. Adjustment assembly; 41. Horizontal adjusting screw; 411. First adjusting screw head; 412. First guide rod; 42. Vertical adjusting screw; 421. Second adjusting screw head; 422. Second guide rod; 43. Guide groove; 44. Sliding bar; 45. Sliding groove; 46. Sliding block; 47. Support plate; 5. Tilting assembly; 51. Adjustment groove; 52. Rotating ring; 53. Rotating shaft; 54. Support 6. Support ring; 7. Rotating assembly; 61. Rotating groove; 62. Arc plate; 63. Ring groove; 64. Gear ring; 7. Fixing assembly; 71. Fixing sleeve; 72. Fixing screw; 73. Extrusion part; 731. Extrusion cylinder; 732. Extrusion ring; 733. Extrusion block; 734. Sliding through hole; 735. Fixing block; 74. Adjusting shaft; 75. Drive gear; 76. Adjusting nut; 77. Limiting groove; 78. Limiting block; 8. Rolling part; 81. Roller; 82. Moving bracket; 83. Support frame; 84. Adjusting part; 841. Adjusting screw. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0038] This application discloses a flexible connection device for ball screw pairs.

[0039] Reference Figure 1 , Figure 2 A flexible connection device for a ball screw assembly includes a frame 1, a screw 21, a nut 22, a connecting rod 23, and a guide rod 3. The two ends of the screw 21 are rotatably mounted on the frame 1. The nut 22 is sleeved on the screw 21 and fixed to the connecting rod 23 by bolts. Both ends of the guide rod 3 are provided with adjusting blocks 31. The frame 1 is provided with adjusting spaces 11 for inserting the adjusting blocks 31. The adjusting spaces 11 correspond one-to-one with the adjusting blocks 31. The frame 1 is provided with adjusting components 4 for adjusting the position of the adjusting blocks 31. The adjusting blocks 31 are provided with flipping components 5 for flipping the guide rod 3 along its length. The flipping components 5 are provided with rotating components 6 for adjusting the lateral rotation angle of the guide rod 3. The flipping components 5 are provided with fixing components 7 for limiting the rotation of the rotating components 6. The connecting rod 23 and the guide rod 3 are connected by rolling elements 8.

[0040] When adjusting the ball screw 21, the adjusting block 31 is moved within the adjusting space 11 by the adjusting component 4, thereby adjusting the height and position of both ends of the guide rod 3. At the same time, under the action of the flipping component 5, the guide rod 3 drives the adjusting block 31 to flip, thereby allowing the guide rod 3 to tilt. Then, the lateral flipping angle of the guide rod 3 is adjusted by the rotating component 6. Then, the nut 22 slides on the guide rod 3 through the connecting rod 23 and the rolling element 8, thereby ensuring that the sliding trajectory of the rolling element 8 on the guide rod 3 is parallel to the sliding trajectory of the nut 22 on the screw 21, thereby reducing the wear caused by the trajectory deviation between the two, and thus improving the service life of the ball screw pair.

[0041] Reference Figure 2 , Figure 3 and Figure 4 The adjustment assembly 4 includes a horizontal adjustment screw 41 and a vertical adjustment screw 42. Both ends of the horizontal adjustment screw 41 are inserted into the frame 1 on the same side and rotated. One end of the horizontal adjustment screw 41 extends out of the frame 1. A first adjustment screw head 411 is fixedly provided at the end of the horizontal adjustment screw 41 extending out of the frame 1. A first guide rod 412 is fixedly provided on the frame 1. The first guide rod 412 is horizontally positioned within the adjustment space 11 and is parallel to the horizontal adjustment screw 41. A support plate 47 is provided on the horizontal adjustment screw 41. The horizontal adjustment screw 41 passes through the support plate 47 and is threadedly connected to the support plate 47. The first guide rod 412 passes through the support plate 47 and slides along the support plate 47. A guide groove 43 is provided on the support plate 47 in a vertical direction. A slider 44 is provided on the adjustment block 31 for sliding within the guide groove 43. The vertical direction of the adjustment space 11... Each of the opposite side walls is provided with a sliding groove 45. One of the sliding grooves 45 on the side wall passes through the frame 1. The frame 1 is provided with a slider 46 for sliding in the sliding groove 45. There are two sliders 46 in each sliding groove 45. A vertical adjusting screw 42 passes through the adjusting block 31 and is threadedly connected to the adjusting block 31. The two ends of the vertical adjusting screw 42 are respectively inserted into the sliders 46 on the same side and are slidably set. One end of the vertical adjusting screw 42 passes through the slider 46 and extends out of the frame 1. A second adjusting screw head 421 is fixedly provided at the end of the vertical adjusting screw 42 that extends out of the frame 1. A second guide rod 422 is provided on the frame 1. The second guide rod 422 is vertically placed in the adjusting space 11. The second guide rod 422 is parallel to the vertical adjusting screw 42. The second guide rod 422 passes through the adjusting block 31 and is slidably set with the adjusting block 31. The two ends of the second guide rod 422 are respectively inserted into the sliders 46 on the same side.

[0042] Reference Figure 2 , Figure 3 and Figure 4Each adjusting block 31 is provided with an adjusting groove 51. The flipping assembly 5 includes a rotating ring 52 and two rotating shafts 53. The two rotating shafts 53 are evenly arranged along the circumference of the outer wall of the rotating ring 52. The axes of the two rotating shafts 53 are collinear. The rotating shafts 53 are inserted into the adjusting block 31 and rotate with the adjusting block 31. There is a gap between the rotating ring 52 and the groove wall of the adjusting groove 51. A support ring 54 is provided between the rotating ring 52 and the groove wall of the adjusting groove 51. The support ring 54 is fixedly arranged with the rotating shaft 53. The axis of the support ring 54 is collinear with the axis of the rotating ring 52. The support ring 54 rotates with the rotating ring 52. A rotating groove 61 is provided on the inner wall of the rotating ring 52. The cross-section of the rotating groove 61 is arc-shaped. The rotating assembly 6 includes an arc plate 62 for inserting into the rotating groove 61. The arc plate 62 is attached to and slidably arranged with the side wall of the rotating groove 61. A guide rod 3 is fixedly arranged on the arc plate 62. The guide rod 3 is arranged along the axis of the arc plate 62.

[0043] When adjusting the guide rod 3, rotating the horizontal adjusting screw 41 causes the support plate 47 to drive the adjusting block 31 to slide horizontally. At this time, the vertical adjusting screw 42 drives the slider 46 to slide in the slide groove 45. Then, rotating the vertical adjusting screw 42 causes the adjusting block 31 to slide vertically. At this time, the slider 44 slides in the guide groove 43. The movement of the adjusting block 31 simultaneously causes the position of the guide rod 3 to change. Through the change in the position of the two ends of the guide rod 3, the axis of the guide rod 3 and the lead screw 21 are collinear. When the two ends of the guide rod 3 are at different heights, the guide rod 3 tilts. At this time, the guide rod 3 drives the rotating ring 52 to rotate around the rotating shaft 53 through the arc plate 62, thereby causing the guide rod 3 to bend, thus adapting to the change in the position of the two ends of the guide rod 3. By adjusting the position of the two ends of the guide rod 3, the position of the guide rod 3 is changed, thereby keeping the guide rod 3 parallel to the lead screw 21, thus effectively avoiding excessive wear of the ball screw 21 and extending the service life of the ball screw 21.

[0044] Reference Figure 4 , Figure 5 and Figure 6The arc plate 62 has an annular groove 63 on its circumferential sidewall, and a toothed ring 64 on the sidewall of the annular groove 63. The fixing assembly 7 includes a fixing sleeve 71, a fixing screw 72, and an extrusion member 73. The fixing sleeve 71 is fixedly disposed on the side of the support ring 54 away from the rotating ring 52. An adjusting shaft 74 is slidably disposed inside the fixing sleeve 71. The adjusting shaft 74 passes through the support ring 54 and the rotating ring 52 and extends into the annular groove 63. A drive gear 75 is coaxially fixed at the end of the adjusting shaft 74 that extends into the annular groove 63. The drive gear 75 meshes with the toothed ring 64. An adjusting nut 76 is fixedly disposed on the adjusting shaft 74. The adjusting nut 76 is located between the support ring 54 and the rotating ring 52. The fixing screw 72 is inserted into the adjusting shaft 74 and threadedly connected to the adjusting shaft 74. The axis of the fixing screw 72 is collinear with the axis of the adjusting shaft 74. A limiting groove 77 is provided on the inner sidewall of the fixing sleeve 71. The fixing screw 72 is... A limiting block 78 is provided for sliding within a limiting groove 77. The limiting groove 77 is arranged along the axial direction of the fixed sleeve 71. The extrusion member 73 includes an extrusion cylinder 731 and an extrusion ring 732. An extrusion block 733 for extruding a fixed screw 72 is fixedly provided on the inner wall of the extrusion cylinder 731. The extrusion cylinder 731 is sleeved on the fixed sleeve 71 and threadedly connected to the fixed sleeve 71. After the extrusion cylinder 731 is screwed on the fixed sleeve 71, the extrusion block 733 presses the fixed screw 72. The fixed sleeve 71 is provided with a sliding through hole 734 and a fixing block 735 for sliding within the sliding through hole 734. The fixing block 735 passes through the sliding through hole 734 and extends out of the fixed sleeve 71. The extrusion ring 732 is sleeved on the fixed sleeve 71 and threadedly connected to the fixed sleeve 71. The extrusion ring 732 pushes the fixing block 735 to abut against the limiting block 78.

[0045] When adjusting the lateral tilting angle of the guide rod 3, the operator rotates the adjusting shaft 74, which drives the drive gear 75 to rotate. The drive gear 75 drives the arc plate 62 to rotate through the gear ring 64, and the arc plate 62 drives the guide rod 3 to rotate, thereby adjusting the lateral rotation of the guide rod 3. This keeps the top wall of the guide rod 3 horizontal, making the sliding of the rolling element 8 on the guide rod 3 smoother and reducing the impact of the connection between the rolling element 8 and the guide rod 3 on the wear of the ball screw 21.

[0046] After adjusting the flip angle of the guide rod 3, the extrusion cylinder 731 is screwed onto the fixed sleeve 71, and then the extrusion block 733 is pressed against the fixed screw 72. Then, the extrusion ring 732 is rotated, and the extrusion ring 732 pushes the fixed block 735 to press against the limit block 78, thereby achieving axial bidirectional restriction on the fixed screw 72, restricting the fixed screw 72 from extending or retracting into the adjusting shaft 74, thereby restricting the rotation of the adjusting shaft 74, thereby achieving lateral fixation of the guide rod 3 and improving the stability of the rolling element 8 sliding on the guide rod 3.

[0047] Reference Figure 1 , Figure 7 The rolling element 8 includes two sets of rollers 81 and a movable bracket 82. Each set of rollers 81 consists of one roller. The guide rod 3 is located between the two rollers 81. Each roller 81 is rotatably mounted to the movable bracket 82 via a support frame 83. The movable bracket 82 is fixedly connected to the connecting rod 23. The movable bracket 82 is provided with an adjusting element 84, which includes an adjusting screw 841. The rollers 81 are rotatably mounted on the support frame 83. The adjusting screw 841 passes through the movable bracket 82 and is threadedly connected to the movable bracket 82. The adjusting screw 841 is rotatably connected to the support frame 83.

[0048] When the nut 22 drives the roller 81 to slide through the connecting rod 23 and the movable bracket 82, the rolling friction between the roller 81 and the guide rod 3 reduces the bending moment generated by the sliding of the roller 81 on the nut 22. At the same time, when the axis of the lead screw 21 deviates horizontally from the guide rod 3, the nut 22 drives the roller 81 to slide laterally along the top wall of the guide rod 3, thereby improving the flexibility of the roller 81 sliding on the guide rod 3 and reducing the wear on the ball screw 21. When installing the roller 81, the installation distance between the roller 81 and the guide rod 3 can be adjusted by rotating the adjusting screw 841, thereby effectively avoiding the gap between the roller 81 and the guide rod 3 and improving the stability of the roller 81 sliding on the guide rod 3.

[0049] The implementation principle of the flexible connection device for a ball screw pair in this application embodiment is as follows: When adjusting the ball screw pair, the height and position of both ends of the guide rod 3 are adjusted by the adjustment component 4. When the heights of the two ends of the guide rod 3 are inconsistent, the guide rod 3 drives the adjustment block 31 to flip under the action of the flipping component 5, so that the guide rod 3 can tilt. Then, the lateral flipping angle of the guide rod 3 is adjusted by the rotation component 6. Then, the nut 22 slides on the guide rod 3 through the connecting rod 23 and the rolling element 8, thereby ensuring that the sliding trajectory of the rolling element 8 on the guide rod 3 is parallel to the sliding trajectory of the nut 22 on the screw 21, thereby reducing the wear of the mechanism caused by the deviation of the two trajectories, and thus improving the service life of the ball screw pair.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flexible connection device for a ball screw assembly, comprising a frame (1), a connecting rod (23), and a guide rod (3), characterized in that: Both ends of the guide rod (3) are fitted with adjusting blocks (31). The adjusting blocks (31) are provided with a flipping component (5) for adjusting the tilting angle of the guide rod (3). The flipping component (5) and the adjusting blocks (31) are connected by a rotating component (6). The rotating component (6) is used to adjust the flipping angle of the guide rod (3). The flipping component (5) is provided with a fixing component (7) for adjusting and fixing the flipping angle of the guide rod (3). The frame (1) is provided with an adjusting component (4) for adjusting the position of the adjusting blocks (31). The adjusting component (4) corresponds one-to-one with the adjusting blocks (31). The connecting rod (23) is connected to the guide rod (3) by a rolling element (8).

2. The flexible connection device for the ball screw assembly according to claim 1, characterized in that: The flipping assembly (5) includes a rotating ring (52) and a rotating shaft (53). The rotating shaft (53) is arranged radially along the rotating ring (52). The rotating shaft (53) is inserted into the adjusting block (31) and rotates with the adjusting block (31).

3. The flexible connection device for the ball screw assembly according to claim 2, characterized in that: The rotating assembly (6) includes an arc plate (62), the rotating ring (52) is rotatably disposed with the adjusting block (31), the rotating ring (52) is provided with a rotating groove (61) for the arc plate (62) to be inserted, the side wall of the arc plate (62) abuts against and slides against the groove wall of the rotating groove (61), and the guide rod (3) slides with the arc plate (62).

4. The flexible connection device for the ball screw assembly according to claim 3, characterized in that: The circular arc plate (62) has a toothed ring (64) on its peripheral sidewall, and an adjusting shaft (74) is rotatably mounted on the rotating ring (52). The adjusting shaft (74) is provided with a drive gear (75) for meshing with the toothed ring (64).

5. The flexible connection device for the ball screw assembly according to claim 4, characterized in that: The fixing component (7) includes a fixing sleeve (71), a fixing screw (72), and an extrusion member (73). The adjusting shaft (74) is inserted into the fixing sleeve (71) and rotated. The fixing screw (72) is inserted into the adjusting shaft (74) and threadedly connected. The axis of the fixing screw (72) is collinear with the axis of the adjusting shaft (74). The fixing sleeve (71) is provided with a limiting groove (77). The fixing screw (72) is rotatably provided with a limiting block (78) for sliding in the limiting groove (77). The extrusion member (73) is used to limit the extension and retraction of the fixing screw (72).

6. The flexible connection device for the ball screw assembly according to claim 5, characterized in that: The extrusion component (73) includes an extrusion cylinder (731) and an extrusion ring (732). The extrusion cylinder (731) is provided with an extrusion block (733) for extruding the fixed screw (72). The extrusion cylinder (731) is threadedly connected to the fixed sleeve (71). The extrusion ring (732) is sleeved on the fixed sleeve (71) and threadedly connected to the fixed sleeve (71). The fixed sleeve (71) is provided with a sliding through hole (734). The extrusion ring (732) is provided with a fixing block (735) for extruding the limiting block (78). The fixing block (735) passes through the sliding through hole (734) and extends into the fixed sleeve (71).

7. The flexible connection device for the ball screw assembly according to claim 2, characterized in that: The adjustment assembly (4) includes a transverse adjustment screw (41). The frame (1) is provided with an adjustment groove (51) for the adjustment block (31) to slide. The transverse adjustment screw (41) is inserted into the side wall of the adjustment groove (51) and rotates with the side wall of the adjustment groove (51). The transverse adjustment screw (41) is provided with a support plate (47). The transverse adjustment screw (41) passes through the support plate (47) and is threadedly connected to the support plate (47). The adjustment block (31) slides with the support plate (47).

8. The flexible connection device for the ball screw assembly according to claim 7, characterized in that: The adjustment assembly (4) further includes a vertical adjustment screw (42), which passes through the adjustment block (31) and is threadedly connected to the adjustment block (31). The adjustment groove (51) has sliding grooves (45) on its opposite sidewalls. The frame (1) is provided with a slider (46) for sliding in the sliding groove (45). The two ends of the vertical adjustment screw (42) are respectively inserted into the slider (46) on the same side. The vertical adjustment screw (42) and the slider (46) are rotatably arranged. The support plate (47) is provided with a guide groove (43), which is arranged along the sliding direction perpendicular to the support plate (47). The adjustment block (31) is provided with a slider (44) for sliding in the guide groove (43).

9. The flexible connection device for the ball screw assembly according to claim 1, characterized in that: The rolling element (8) includes two sets of rollers (81) and a movable bracket (82). The movable bracket (82) is connected to the connecting rod (23). The guide rod (3) is located between the two sets of rollers (81). Each set of rollers (81) is rotatably provided with a support frame (83). The movable bracket (82) is provided with an adjusting element (84) for pushing the two support frames (83) closer to each other.

10. The flexible connection device for the ball screw assembly according to claim 9, characterized in that: The adjusting component (84) includes an adjusting screw (841), which corresponds one-to-one with the movable bracket (82). The adjusting screw (841) is threadedly connected to the movable bracket (82), and the adjusting screw (841) is rotatably connected to the support frame (83).

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