Ball spline pair

Abstract

The application relates to a ball spline pair and belongs to the ball spline field. The ball spline pair comprises a spline shaft, two mounting plates are arranged on the spline shaft, the two mounting plates enclose a sleeve for being sleeved on the spline shaft, a ball spline sleeve for being matched with the spline shaft is arranged in the sleeve, the ball spline sleeve comprises a plurality of sleeves which are distributed in the circumferential direction of the spline shaft, two mounting plates correspond to one or more base plates, and the base plates are detachably fixedly connected to the corresponding mounting plates, and each base plate is provided with one or more groups of ball circulating units for being matched with the spline shaft. The ball spline pair can conveniently replace the ball spline sleeve on the screw rod.

Description

Technical Field

[0001] This application relates to the field of ball splines, and more particularly to a ball spline pair. Background Technology

[0002] A ball spline is a rolling guide assembly, mainly composed of a screw and a ball spline sleeve. The ball spline sleeve consists of a nut, steel balls, and a retainer. The steel balls roll infinitely between the nut and the screw, allowing the nut to move linearly and with high precision along the screw. Compared to linear bearings, the steel balls in the rolling grooves make angular contact, thus allowing relative movement between the nut and the screw to transmit torque.

[0003] Traditionally, when a nut is fitted onto a screw and the ball spline sleeve needs replacement due to excessive wear of the steel balls, the operator must first remove the screw from the corresponding equipment, then slide the ball spline sleeve off the end of the screw, install a new ball spline sleeve, and finally reinstall the screw onto the corresponding equipment. If the screw's installation relationship on the corresponding equipment is too complex, excessive time will be spent on installing and removing the screw, making the replacement of the ball spline sleeve overly cumbersome. Summary of the Invention

[0004] To facilitate operators in replacing the ball spline sleeve on the screw, this application provides a ball spline pair.

[0005] The ball spline pair provided in this application adopts the following technical solution:

[0006] A ball spline assembly includes a spline shaft with two mounting plates. The two mounting plates form a sleeve for fitting onto the spline shaft. A ball spline sleeve for cooperating with the spline shaft is disposed within the sleeve. The ball spline sleeve includes a plurality of sleeves distributed circumferentially along the spline shaft. Each of the two mounting plates corresponds to one or more base plates, and the base plates are detachably and fixedly connected to the corresponding mounting plate. Each base plate is provided with one or more sets of ball circulation units for cooperating with the spline shaft.

[0007] By adopting the above technical solution, when replacing the ball spline sleeve, the operator can directly disassemble the two mounting plates, then remove the base plate to be replaced from the corresponding mounting plate and replace it. By collaring the damaged part of the ball spline sleeve, the waste caused by the entire ball spline sleeve being collared is reduced. In addition, during the process of installing and removing the ball spline sleeve, the operator does not need to slip or slide the ball spline sleeve from the end of the spline shaft, reducing the time and effort spent by the operator in disassembling the spline shaft, and thus improving the efficiency of the operator in replacing the ball spline sleeve.

[0008] Optionally, the inner wall of the mounting plate is provided with a receiving groove for accommodating the substrate. Limiting blocks are provided at both ends of the substrate along its own axial direction. A first slot for the limiting block to be inserted is provided on the groove wall at one end of the receiving groove. The other end of the receiving groove is open. A limiting seat is detachably provided on the mounting plate. The limiting seat is used to restrict the substrate from leaving the receiving groove, and a second slot for the limiting block to be inserted is provided on the limiting seat.

[0009] By adopting the above technical solution, the operator opens the limiting seat, inserts the substrate into the receiving groove, and then moves the substrate so that the limiting block at one end of the substrate is inserted into the first slot. The operator then installs the limiting seat so that the limiting block at the other end of the substrate is inserted into the second slot, thereby realizing the detachable installation and fixation of the base on the corresponding mounting plate.

[0010] Optionally, the limiting seat is hinged to the mounting plate. When the two mounting plates are connected to each other, the two limiting seats abut against each other and restrict the limiting seat from rotating.

[0011] By adopting the above technical solution, the operator flips the limiting seat so that the limiting seat blocks the receiving groove. The operator connects the two mounting plates so that the limiting seats on the two mounting plates abut against each other, thereby limiting each other and restricting the flipping of the limiting seat, thus achieving the effect of detachably and fixedly connecting the substrate to the mounting plate.

[0012] Optionally, the limiting seat is hinged to the mounting plate via a rotating shaft. The mounting plate has an elongated hole corresponding to the position of the rotating shaft, and the rotating shaft can slide and rotate to be inserted into the elongated hole. A limiting post is fixedly connected to the limiting seat. A limiting groove for the limiting post to be inserted is provided on the opposite surfaces of the two mounting plates. The limiting post can be inserted into or slid out of the limiting groove along the length direction of the elongated hole.

[0013] By adopting the above technical solution, the operator flips the limiting seat so that it seals the end of the receiving groove. Then, the operator pushes the limiting seat to move, causing the spindle to slide in the elongated hole and the limiting post to be inserted into the limiting groove. The operator then splices and installs two mounting plates so that the two limiting seats abut against each other. Under the locking action of the limiting post and the limiting groove, the flipping of the limiting seat is further restricted, which helps to improve the installation stability of the substrate on the mounting plate.

[0014] Optionally, a flip plate is hinged to the mounting plate, and the flip plate is fixedly connected to another mounting plate by bolts.

[0015] By adopting the above technical solution, the operator rotates the flip plate so that it abuts against another mounting plate. Then, the operator uses bolts to fix the flip plates corresponding to the two mounting plates to the other mounting plate, thereby realizing a detachable connection between the two mounting plates, which facilitates the installation or removal of the sleeve and ball spline sleeve on the spline shaft.

[0016] Optionally, a first insert block is fixed on the flip plate, and a first slot for inserting the first insert block is fixedly connected to the side of the mounting plate opposite to the flip plate.

[0017] By adopting the above technical solution, the operator rotates the flip plate and connects it to another mounting plate. During this process, the first insert is inserted into the first slot. The force is directly applied through the insertion between the first insert and the first slot, which reduces the possibility of damage caused by excessive shearing force on the bolts, thereby improving the connection stability between the two mounting plates.

[0018] Optionally, a positioning block is fixedly connected to one side of the mounting plate along its own radial direction, and a positioning groove is provided on the side of the mounting plate opposite to the positioning block for the positioning block to be inserted. The flip plate is hinged to the mounting plate.

[0019] By adopting the above technical solution, the positioning block is inserted into the positioning groove of another mounting plate, which facilitates the positioning between the two mounting plates and reduces the occurrence of axial misalignment between the two mounting plates.

[0020] Optionally, the positioning block is provided with a clearance groove, the flip plate is hinged in the clearance groove, and the flip plate is fixedly connected to both sides along its own hinge axis with a second insert block. The groove wall of the clearance groove is provided with a second slot for the second insert block to be inserted.

[0021] By adopting the above technical solution, when the operator rotates the flip plate and connects it with another mounting plate, the second insert is inserted into the corresponding second insert. At this time, the second insert and the second slot cooperate to bear force, which reduces the situation of excessive force and deformation of the hinge shaft of the flip plate, and helps to further improve the connection stability between the two mounting plates.

[0022] Optionally, the splined shaft includes a main shaft, the end of which is detachably provided with a mounting shaft for connection with the equipment, a connecting seat is fixedly connected to the upper end of the main shaft, a connecting rod is hinged to the mounting shaft, the connecting seat has a groove for insertion of the connecting rod, a collar is slidably sleeved on the connecting rod, a limiting ring is provided on the connecting rod for limiting the sliding distance of the collar, and a threaded sleeve for threaded connection with the connecting seat is rotatably connected to the collar.

[0023] By adopting the above technical solution, when disassembling the spindle, the operator loosens the threaded sleeve, and then flips the connecting rod to disengage it from the groove, thereby achieving the effect of separating the spindle from the mounting shaft, which facilitates the operator's assembly and disassembly of the spindle.

[0024] Optionally, a limiting cylinder is fixedly connected to one end of the limiting ring facing the mounting shaft. The limiting cylinder has an opening at one end facing the mounting shaft for the mounting shaft to pass through. An adjustment unit is provided on the connecting rod for controlling the angle of the limiting cylinder. The adjustment unit is used to control whether the opening is aligned with the flip angle of the mounting shaft.

[0025] By adopting the above technical solution, when the spindle and the mounting shaft are fixed, the opening of the limiting cylinder is offset from the rotation angle of the mounting shaft, restricting the rotation of the connecting rod. When the operator disassembles the spindle, they loosen the locking nut to release the connection between the threaded sleeve and the connecting seat. Then, the operator controls the rotation of the limiting cylinder through the adjustment unit, aligning the opening of the limiting cylinder with the rotation angle of the mounting shaft. This facilitates the operator's rotation of the connecting rod, causing it to disengage from the corresponding groove and achieving separation between the spindle and the mounting shaft.

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

[0027] 1. During the installation and removal of the ball spline sleeve, there is no need to put the ball spline sleeve into or slide it out from the end of the spline shaft, which reduces the time and effort consumed by the operator in disassembling the spline shaft and helps to improve the efficiency of the operator in replacing the ball spline sleeve.

[0028] 2. The ball spline sleeve is divided into several base plates. By re-ringing the damaged parts of the ball spline sleeve, the waste caused by the entire ball spline sleeve is reduced. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0030] Figure 2 This is a schematic diagram illustrating the structure of the sleeve in an embodiment of this application.

[0031] Figure 3 This is a schematic diagram illustrating the structure of the positioning block in an embodiment of this application.

[0032] Figure 4 This is a schematic diagram illustrating the structure of the limiting seat in an embodiment of this application.

[0033] Figure 5 This is an exploded view of the receiving tank used in the embodiments of this application.

[0034] Figure 6 This is an exploded view of the connecting rod used in the embodiments of this application.

[0035] Figure 7 This is a structural schematic diagram illustrating the flipped state of the connecting rod in an embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Splined shaft; 11. Main shaft; 12. Spline groove; 13. Mounting shaft; 2. Connecting seat; 21. Groove; 22. Connecting rod; 23. Collar; 24. Limiting ring; 25. Screw sleeve; 26. Limiting sleeve; 27. Opening; 3. Adjusting unit; 31. First adjusting groove; 32. Second adjusting groove; 33. Slider; 4. Sleeve; 41. Mounting plate; 42. Reference surface; 43. Receiving groove; 44. Limiting 45. First slot; 46. Limiting seat; 47. Second slot; 48. Mounting slot; 5. Long hole; 51. Rotating shaft; 52. Limiting post; 53. Limiting groove; 6. Ball spline sleeve; 61. Base plate; 62. Ball circulation unit; 7. Positioning block; 71. Positioning groove; 72. Clearance groove; 73. Flip plate; 74. First insert block; 75. First slot; 76. Second insert block; 77. Second slot; 78. Bolt. 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 ball spline assembly. For example... Figure 1 and Figure 2 The ball spline assembly includes a spline shaft 1, which includes a main shaft 11. Both ends of the main shaft 11 are detachably and fixedly connected to mounting shafts 13 for connection with equipment. The main shaft 11 is provided with two semi-circular mounting plates 41, which are detachably connected to each other to form a sleeve 4, and the sleeve 4 is fitted onto the main shaft 11.

[0039] like Figure 2 and Figure 3 The sleeve 4 is equipped with a ball spline sleeve 6 for cooperating with the spindle 11. Each ball spline sleeve 6 is provided with a set of base plates 61 corresponding to each mounting plate 41. Each base plate 61 has one or more sets of ball circulation units 62 on its inner side. The spindle 11 is provided with spline grooves 12 for cooperating with the balls. A set of base plates 61 can be one or multiple sets arranged along the arc direction of the mounting plate 41. In the embodiment of this application, one mounting plate 41 corresponds to one base plate 61, and the base plate 61 can be detachably installed on the inner wall of the corresponding mounting plate 41.

[0040] like Figure 4 and Figure 5The mounting plate 41 has a receiving groove 43 on its inner wall for accommodating the substrate 61. Limiting blocks 44 are fixedly connected to both ends of the substrate 61 along its axial direction. A first slot 45 for inserting the limiting block 44 is formed on one end of the receiving groove 43 along the axial direction of the mounting plate 41. The side wall of the receiving groove 43 away from the first slot 45 is open along the axial direction of the mounting plate 41. A mounting groove 48 communicating with the receiving groove 43 is formed at the end of the mounting plate 41 near the open end. A limiting seat 46 for preventing the substrate 61 from disengaging from the receiving groove 43 is rotatably connected to the mounting groove 48 via a rotating shaft 51. A second slot 47 for inserting the limiting block 44 is formed on the limiting seat 46.

[0041] The rotating shaft 51 is fixedly connected to the limiting seat 46, and the groove wall of the mounting groove 48 has elongated holes 5 at both ends corresponding to the rotating shaft 51. The relative planes of the two mounting plates 41 are designated as the reference plane 42. The length direction of the elongated holes 5 is perpendicular to the reference plane 42. The rotating shaft 51 is inserted into the elongated holes 5 and can slide or rotate within the two elongated holes 5. Limiting posts 52 are fixedly connected to both sides of the limiting seat 46. The mounting plate 41 has limiting grooves 53 on the reference plane 42 for the insertion of the limiting posts 52. The limiting posts 52 can be inserted into the limiting grooves 53 along the length direction of the corresponding elongated holes 5. When the limiting posts 52 are inserted into the corresponding limiting grooves 53, if the reference planes 42 of the two mounting plates 41 are aligned and spliced, the two limiting seats 46 abut against each other, restricting the rotation of the limiting seats 46.

[0042] like Figure 2 and Figure 3 A positioning block 7 is fixedly connected to one side of the mounting plate 41 along its own arc direction, and a positioning groove 71 for the positioning block 7 to be inserted is fixedly connected to the side of the mounting plate 41 away from the positioning block 7. The positioning block 7 cooperates with the positioning groove 71 on another mounting plate 41 to achieve the positioning effect between the two mounting plates 41. A clearance groove 72 is opened on the side of the positioning block 7 away from the mounting plate 41, and a flip plate 73 is hinged in the clearance groove 72. A second insert 76 is fixedly connected to the flip plate 73 at the position of the groove wall of the clearance groove 72, and a second slot 77 for the second insert 76 to be inserted is opened on the groove wall of the clearance groove 72. A first insert 74 is fixedly connected to the flip plate 73 at the position of the positioning groove 71 of another mounting plate 41, and a first slot 75 for the first insert 74 to be inserted is opened on the bottom wall of the groove of the positioning groove 71. A bolt 78 passes through the flip plate 73, and the bolt 78 is threadedly connected to the bottom wall of the groove of the positioning groove 71 of the other mounting plate 41. When the flip plate 73 is fixedly connected to the positioning groove 71 of another mounting plate 41 by bolts 78, the first insert 74 is inserted into the first slot 75, and the second insert 76 is inserted into the second slot 77. The cooperation between the first insert 74 and the first slot 75, and the cooperation between the second insert 76 and the second slot 77, helps to improve the stability of the splicing installation between the two mounting plates 41.

[0043] like Figure 6 and Figure 7 A cylindrical connecting seat 2 is coaxially fixed to the end of the main shaft 11. The end of the connecting seat 2 facing the mounting shaft 13 has a groove 21 along its own axial direction. A connecting rod 22 is hinged to the end of the mounting shaft 13 facing the connecting seat 2, and the hinge axis of the connecting rod 22 is perpendicular to the axis of the mounting shaft 13. The end of the connecting rod 22 away from the mounting shaft 13 can be inserted into the groove 21. A collar 23 is slidably sleeved on the connecting rod 22. Limiting rings 24 for limiting the sliding distance of the collar 23 are fixedly connected to both ends of the connecting rod 22. A threaded sleeve 25 is coaxially fixed to the side of the collar 23 facing the corresponding connecting seat 2, and the threaded sleeve 25 can be threaded into the corresponding connecting seat 2. When the threaded sleeve 25 is tightened, the collar 23 abuts against the limiting ring 24 near the connecting seat 2, and the connecting rod 22 abuts against the connecting seat 2.

[0044] A limiting ring 24 is coaxially fixedly connected to a limiting cylinder 26 on the side facing the corresponding mounting shaft 13. The limiting cylinder 26 is sleeved on the connecting rod 22 and the mounting shaft 13. An opening 27 is provided on the side of the limiting cylinder 26 away from the collar 23, and the opening 27 allows the mounting shaft 13 to pass through. An adjustment unit 3 for controlling the rotation angle of the limiting cylinder 26 is provided on the connecting rod 22. The adjustment unit 3 includes a slider 33 fixedly connected to the inner wall of the limiting cylinder 26. A first adjustment groove 31 and a second adjustment groove 32 are provided axially on the limiting ring 24 near the mounting shaft 13. The first adjustment groove 31 and the second adjustment groove 32 are spaced 90° apart around the circumference of the corresponding limiting ring 24. The slider 33 can slide axially into the first adjustment groove 31 or the second adjustment groove 32.

[0045] When the positioning ring abuts against the limiting ring 24 near the main shaft 11, the slider 33 is inserted into the first adjusting groove 31 or the second adjusting groove 32; when the positioning ring abuts against the limiting ring 24 near the mounting shaft 13, the slider 33 disengages from the first adjusting groove 31 and the second adjusting groove 32. When the slider 33 is inserted into the first adjusting groove 31, the opening 27 on the limiting cylinder 26 is aligned with the flip angle of the connecting rod 22; when the slider 33 is inserted into the second adjusting groove 32, the opening 27 on the limiting cylinder 26 is offset from the flip angle of the connecting rod 22, thus restricting the flipping of the connecting rod 22 by the limiting cylinder 26.

[0046] In the initial state, the connecting rod 22 is inserted into the groove 21 on the connecting seat 2, the collar 23 abuts against the limiting ring 24 near the main shaft 11, and the threaded sleeve 25 is threaded onto the connecting seat 2. The slider 33 is inserted into the second adjustment groove 32. When the operator needs to separate the main shaft 11 from the mounting shaft 13, the operator first loosens the threaded sleeve 25 to separate it from the connecting seat 2. Then, the operator moves the collar 23 so that it abuts against the limiting ring 24 near the mounting shaft 13. At this time, the slider 33 disengages from the second adjustment groove 32. Then, the operator rotates the limiting cylinder 26 to insert the slider 33 into the first adjustment groove 31. At this time, the opening 27 on the limiting cylinder 26 is aligned with the flip angle of the connecting rod 22. The operator can flip the connecting rod 22 to disengage it from the groove 21, thereby facilitating the disassembly of the main shaft 11 from the mounting shaft 13 and making it easier for the operator to replace the main shaft 11.

[0047] The implementation principle of this application embodiment is as follows: When the operator needs to replace the ball spline sleeve 6, the operator loosens the bolt 78 and then rotates the flip plate 73 to release the connection between the two mounting plates 41, thus separating the ball spline sleeve 6 from the spindle 11. Then, the operator moves the limiting seat 46, causing the spindle 11 to slide within the elongated hole 5, and driving the limiting post 52 out of the limiting groove 53. The operator then flips the limiting seat 46 to release the limiting effect on the base plate 61, allowing the operator to replace the new base plate 61. By replacing the damaged part of the ball spline sleeve 6, the need for complete replacement when the ball spline sleeve 6 is damaged is reduced, thereby reducing resource waste. Furthermore, by replacing the ball spline sleeve 6 in this way, the operator does not need to disassemble the spindle 11, reducing the time spent by the operator disassembling the connection between the spindle 11 and the equipment.

[0048] 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 ball spline assembly, characterized in that: The system includes a spline shaft (1), on which two mounting plates (41) are provided. The two mounting plates (41) form a sleeve (4) for fitting onto the spline shaft (1). A ball spline sleeve (6) for cooperating with the spline shaft (1) is provided inside the sleeve (4). The ball spline sleeve (6) includes multiple sleeves (4) distributed circumferentially along the spline shaft (1). Each of the two mounting plates (41) corresponds to one or more base plates (61), and the base plate (61) is detachably and fixedly connected to the corresponding mounting plate (41). Each base plate (61) is provided with one or more sets of ball circulation units (62) for cooperating with the spline shaft (1). A flip plate (73) is hinged on the mounting plate (41), and the flip plate (73) is fixedly connected to the other mounting plate (41) by bolts (78).

2. The ball spline assembly according to claim 1, characterized in that: The mounting plate (41) has a receiving groove (43) on its inner wall for accommodating the substrate (61). The substrate (61) has a limiting block (44) at both ends along its own axial direction. A first slot (45) for the limiting block (44) to be inserted is provided on the groove wall at one end of the receiving groove (43). The other end of the receiving groove (43) is open. A limiting seat (46) is detachably provided on the mounting plate (41). The limiting seat (46) is used to restrict the substrate (61) from leaving the receiving groove (43). A second slot (47) for the limiting block (44) to be inserted is provided on the limiting seat (46).

3. A ball spline assembly according to claim 2, characterized in that: The limiting seat (46) is hinged to the mounting plate (41). When the two mounting plates (41) are connected to each other, the two limiting seats (46) abut against each other and restrict the limiting seat (46) from flipping.

4. A ball spline assembly according to claim 2, characterized in that: The limiting seat (46) is hinged to the mounting plate (41) via a rotating shaft (51). The mounting plate (41) has an elongated hole (5) corresponding to the position of the rotating shaft (51), and the rotating shaft (51) can slide and rotate to be inserted into the elongated hole (5). A limiting post (52) is fixedly connected to the limiting seat (46). A limiting groove (53) for the limiting post (52) to be inserted is provided on the opposite surfaces of the two mounting plates (41). The limiting post (52) can be inserted into or slide out of the limiting groove (53) along the length direction of the elongated hole (5).

5. A ball spline assembly according to claim 1, characterized in that: A first insert (74) is fixed on the flip plate (73), and a first slot (75) for inserting the first insert (74) is fixedly connected to the side of the mounting plate (41) away from the flip plate (73).

6. A ball spline assembly according to claim 1, characterized in that: The mounting plate (41) is fixedly connected to a positioning block (7) on one side of its radial direction. The mounting plate (41) has a positioning groove (71) on the side opposite to the positioning block (7) for the positioning block (7) to be inserted. The flip plate (73) is hinged to the mounting plate (41).

7. A ball spline assembly according to claim 6, characterized in that: The positioning block (7) has a clearance groove (72), the flip plate (73) is hinged in the clearance groove (72), and the flip plate (73) has a second insert (76) fixedly connected on both sides along its own hinge axis. The clearance groove (72) has a second slot (77) for the second insert (76) to be inserted into.

8. A ball spline assembly according to claim 1, characterized in that: The spline shaft (1) includes a main shaft (11), and the end of the main shaft (11) is detachably provided with a mounting shaft (13) for connecting to the equipment. The upper end of the main shaft (11) is fixedly connected with a connecting seat (2). A connecting rod (22) is hinged on the mounting shaft (13). The connecting seat (2) is provided with a groove (21) for the connecting rod (22) to be inserted. A collar (23) is slidably sleeved on the connecting rod (22). A limiting ring (24) is provided on the connecting rod (22) for limiting the sliding distance of the collar (23). A threaded sleeve (25) for threaded connection with the connecting seat (2) is rotatably connected to the collar (23).

9. A ball spline assembly according to claim 8, characterized in that: The limiting ring (24) is fixedly connected to a limiting cylinder (26) at one end facing the mounting shaft (13). The limiting cylinder (26) has an opening (27) at one end facing the mounting shaft (13) for the mounting shaft (13) to pass through. The connecting rod (22) is provided with an adjustment unit (3) for controlling the angle of the limiting cylinder (26). The adjustment unit (3) is used to control whether the opening (27) is aligned with the flip angle of the mounting shaft (13).

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