A ball spline shaft drilling jig

Abstract

A ball spline shaft drilling fixture includes a support base, a movable panel, and a cylinder. A mounting plate is fixedly connected to the top of the support base, and a slide rail is fixedly mounted on the top of the mounting plate. A slider is fixedly connected to the lower surface of the movable panel, and the movable panel is slidably connected to the slide rail via the slider. A pneumatic chuck is fixedly mounted on the movable panel for clamping the ball spline shaft. A through hole is formed in the center of the movable panel, and corresponding strip holes are formed on the surface of the mounting plate. The axis of the strip holes is parallel to the axis of the slide rail, and the ball spline shaft passes through the through hole and the strip holes. The cylinder is fixedly mounted on one side of the upper surface of the support base, and the piston rod of the cylinder is connected to the movable panel via a connecting seat. The direction of movement of the piston rod is parallel to the axis of the slide rail. This invention overcomes the shortcomings of the prior art, ensuring the coaxiality and stability of the ball spline shaft during the drilling process. It is also suitable for the universal processing needs of ball spline shafts of various specifications.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to machining fixtures, specifically a ball spline shaft drilling fixture. Background Technology

[0002] A ball spline shaft is a high-precision transmission component that combines torque transmission with linear displacement motion, and is widely used in fields such as high-torque constant velocity joint drive shafts. Drilling is required during its manufacturing process.

[0003] Existing technologies generally employ two types of clamping methods: the first is the traditional manual clamping method, which results in low processing efficiency, high labor intensity, and susceptibility to errors due to human factors. The second method uses a semi-automatic hydraulic clamp, which, although driven by a hydraulic cylinder, lacks an axial guide mechanism on the clamp base. When the workpiece moves, it experiences radial sway due to hydraulic impact, easily causing drill bit deflection and breakage during drilling. Furthermore, fixed positioning baffles cannot accommodate shafts of different lengths, and changing product specifications requires disassembling and adjusting components, which is costly and inconvenient to maintain. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a ball spline shaft drilling fixture, which overcomes the deficiencies of existing technologies, features a reasonable design, and ensures the coaxiality and stability of the ball spline shaft during the drilling process. It is also suitable for the universal machining needs of ball spline shafts of various specifications.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A ball spline shaft drilling fixture includes a support base, a movable panel, and a cylinder. A mounting plate is fixedly connected to the top of the support base, and a slide rail is fixedly mounted on the top of the mounting plate. A slider is fixedly connected to the lower surface of the movable panel, and the movable panel is slidably connected to the slide rail via the slider. A pneumatic chuck is fixedly mounted on the movable panel for clamping the ball spline shaft. The axial direction of the pneumatic chuck is perpendicular to the length direction of the slide rail. A through hole is formed in the middle of the movable panel, and a strip hole corresponding to the top and bottom of the through hole is formed on the surface of the mounting plate. The length direction of the strip hole is parallel to the axis of the slide rail. The ball spline shaft passes through the through hole and moves in the strip hole.

[0007] The cylinder is fixedly mounted on one side of the upper surface of the mounting plate. The piston rod of the cylinder is connected to the movable panel, and the direction of movement of the piston rod is parallel to the axis of the slide rail.

[0008] Preferably, a limit block is provided at one end of the slide rail near the cylinder, and the limit block is fixedly mounted on the mounting plate.

[0009] Preferably, one end of the piston rod of the cylinder is fixedly installed with a fisheye connector, the movable panel is fixedly connected to a connecting seat on the side near the cylinder, and the other end of the fisheye connector is connected to the connecting seat through a pin.

[0010] Preferably, two positioning reference plates are fixedly installed at the bottom of the inner cavity of the support base. The positioning reference plates correspond to the ball spline shaft and are used to position the lower end of the ball spline shaft.

[0011] This invention provides a ball spline shaft drilling fixture with the following advantages: The sliding block and slide rail form a linear guide pair, effectively eliminating radial degrees of freedom. The through-hole of the movable panel further constrains and guides the ball spline shaft, ensuring its coaxiality and stability during drilling. The cylinder-driven movable panel design allows the ball spline shaft to move precisely along a predetermined axis, further improving drilling accuracy. Simultaneously, the vertical alignment of the strip hole and through hole effectively prevents offset or vibration caused by uneven force during movement, thus ensuring drilling quality. This fixture is simple in structure and easy to operate, not only improving processing efficiency but also significantly enhancing stability and reliability during drilling, making it suitable for the generalized processing needs of ball spline shafts of various specifications. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of this utility model or the prior art will be briefly introduced below.

[0013] Figure 1 Structural diagram of this utility model Figure 1 ;

[0014] Figure 2 Structural diagram of this utility model Figure 2 ;

[0015] Figure 3 A schematic diagram of the cross-sectional structure of this utility model;

[0016] Explanation of the labels in the diagram:

[0017] 1. Support base; 2. Movable panel; 3. Cylinder; 4. Mounting plate; 5. Slide rail; 6. Slider; 7. Pneumatic chuck; 8. Ball spline shaft; 9. Through hole; 10. Strip hole; 11. Limit block; 12. Fish eye connector; 13. Connecting seat; 14. Positioning reference plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0019] Example 1, as Figure 1-3 As shown, a ball spline shaft drilling fixture includes a support base 1, a movable panel 2, and a cylinder 3. A mounting plate 4 is fixedly connected to the top of the support base 1, and two sets of parallel slide rails 5 are fixedly installed on the top of the mounting plate 4. A slider 6 is fixedly connected to the lower surface of the movable panel 2, and the movable panel 2 is slidably connected to the slide rails 5 through the slider 6. A pneumatic chuck 7 is fixedly installed on the movable panel 2 for clamping the ball spline shaft 8. A through hole 9 is opened in the middle of the movable panel 2, and a strip hole 10 corresponding to the through hole 9 is opened on the surface of the mounting plate 4. The length direction of the strip hole 10 is parallel to the axis of the slide rail 5. The ball spline shaft 8 passes through the through hole 9 and moves in the strip hole 10.

[0020] Cylinder 3 is fixedly installed on one side of the upper surface of mounting plate 4. The piston rod of cylinder 3 is connected to movable panel 2. The direction of movement of piston rod of cylinder 3 is parallel to the axis of slide rail 5.

[0021] Working principle:

[0022] When drilling is required on the ball spline shaft, first place the ball spline shaft 8 in the pneumatic chuck 7, with the lower end of the ball spline shaft 8 passing through the through hole 9 and the slotted hole 10. Then, press the first foot switch to activate the pneumatic chuck 7 to perform a clamping action, thus firmly clamping the ball spline shaft 8 and ensuring it remains stationary. Simultaneously, the piston rod of the cylinder 3 pulls the movable panel 2 to slide along the slide rail 5. Since the movable panel 2 is slidably connected to the slide rail 5 via the slider 6, it can move smoothly along the slide rail 5. Furthermore, because the piston rod of the cylinder 3 moves parallel to the axis of the slide rail 5, it ensures that the movable panel 2 will not tilt or wobble during movement. During the movement of the movable panel 2, the slotted hole 10 serves as clearance space for the ball spline shaft 8, allowing it to move axially along the slotted hole 10 to the predetermined drilling position. At this point, drilling equipment can be used to drill the ball spline shaft 8. During the drilling process, the pneumatic chuck 7 firmly clamps the ball spline shaft 8, ensuring drilling accuracy and stability. After drilling is completed, the second foot switch is pressed to control the "processing end and reset" process. After pressing the second foot switch, the piston rod of the cylinder 3 extends, driving the movable panel 2 to slide in the opposite direction along the slide rail 5 back to the initial position. At the same time, the pneumatic chuck 7 automatically releases, releasing the clamping state of the ball spline shaft 8, thus facilitating the removal of the machined ball spline shaft 8. Throughout the entire processing, the fixture achieves rapid clamping and release of the ball spline shaft 8 through the pneumatic chuck 7, while the cylinder 3 drives the movable panel 2 to move smoothly along the slide rail 5, allowing the ball spline shaft 8 to accurately reach the drilling position, effectively improving drilling accuracy and processing efficiency.

[0023] In this embodiment, two foot switches are used to control the clamping and releasing actions of the pneumatic chuck 7 and the extension and retraction movements of the cylinder 3. This is a common control method in the prior art, enabling convenient control of the machining process. Specifically, the foot switch is a pneumatic two-position three-way or five-way valve. When the first foot switch is pressed, the main air circuit is connected. The airflow first enters the cylinder of the pneumatic chuck to clamp it. When the pressure in the chuck cylinder reaches the set value, a sequence valve is triggered, and the airflow then enters the cylinder, causing its piston rod to retract. Similarly, after drilling is completed, pressing the second foot switch again switches the airflow direction, thereby controlling the piston rod of the cylinder to extend, driving the movable panel back to the initial position along the slide rail, releasing the pneumatic chuck, and completing the entire machining cycle. Alternatively, an electric control method can be used, where the foot switch is an electronic switch (or a pneumatic-electric switch). Through a controller and a solenoid valve, automated control of the pneumatic chuck 7 and cylinder 3 can be achieved (this is prior art and will not be described further).

[0024] This invention utilizes a slider and a slide rail to form a linear guide pair, effectively eliminating radial degrees of freedom. The through-hole 9 in the movable panel 2 constrains and guides the ball spline shaft 8, ensuring its coaxiality and stability during drilling. The cylinder-driven movable panel design allows the ball spline shaft to move precisely along a predetermined axis, further improving drilling accuracy. Simultaneously, the vertical alignment of the slotted hole and the through-hole allows the ball spline shaft to slide freely along the axis of the slotted hole after passing through the through-hole, effectively preventing offset or vibration caused by uneven force during movement, thus ensuring drilling quality. This fixture has a simple structure and is easy to operate, not only improving processing efficiency but also significantly enhancing stability and reliability during drilling, making it suitable for the universal processing needs of various specifications of ball spline shafts.

[0025] In Embodiment Two, as a further preferred embodiment of Embodiment One, a limiting block 11 is provided at one end of the slide rail 5 near the cylinder 3, and the limiting block 11 is fixedly mounted on the mounting plate 4. By providing the limiting block 11, excessive sliding of the movable panel 2 under the push of the cylinder 3 is effectively prevented from disengaging from the slide rail 5, thereby ensuring that the movable panel 2 moves smoothly within a predetermined stroke range. This not only improves the safety of the overall structure but also effectively avoids equipment damage or processing errors caused by stroke loss of control.

[0026] In Example 3, as a further preferred embodiment of Example 1, one end of a spherical connector 12 is fixedly mounted on the piston rod end of the cylinder 3. A connecting seat 13 is fixedly connected to the side of the movable panel 2 near the cylinder 3. The other end of the spherical connector 12 is rotatably connected to the connecting seat 13 via a pin. By adopting the rotatable connection structure between the spherical connector 12 and the connecting seat 13, a flexible connection is formed between the piston rod of the cylinder 3 and the connecting seat 13, thereby effectively compensating for any slight axial deviation that may occur between the cylinder 3 and the movable panel 2 during installation, and avoiding stress concentration or movement jamming caused by rigid connection. This structure not only improves the flexibility and smoothness of the cylinder 3 driving the movable panel 2 to move, but also extends the service life of the cylinder 3 and related connecting components.

[0027] In Example 4, as a further preferred embodiment of Example 1, two positioning reference plates 14 are fixedly installed at the bottom of the inner cavity of the support base 1. The positioning reference plates 14 correspond to the ball spline shaft 8 and are used to position the lower end of the ball spline shaft 8. By setting two positioning reference plates 14, the bottom position of the ball spline shaft 8 in the clamping state can be accurately positioned, thereby further improving the overall positioning accuracy.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ball spline shaft drilling fixture, characterized in that: The device includes a support base (1), a movable panel (2), and a cylinder (3). A mounting plate (4) is fixedly connected to the top of the support base (1), and a slide rail (5) is fixedly installed on the top of the mounting plate (4). A slider (6) is fixedly connected to the lower surface of the movable panel (2). The movable panel (2) is slidably connected to the slide rail (5) through the slider (6). A pneumatic chuck (7) is fixedly installed on the movable panel (2). The pneumatic chuck (7) is used to clamp the ball spline shaft (8). The axial direction of the pneumatic chuck (7) is perpendicular to the length direction of the slide rail (5). A through hole (9) is opened in the middle of the movable panel (2). A strip hole (10) corresponding to the through hole (9) is opened on the surface of the mounting plate (4). The length direction of the strip hole (10) is parallel to the axis of the slide rail (5). The cylinder (3) is fixedly installed on one side of the upper surface of the mounting plate (4). The piston rod of the cylinder (3) is connected to the movable panel (2). The direction of movement of the piston rod of the cylinder (3) is parallel to the axis of the slide rail (5).

2. The ball spline shaft drilling fixture according to claim 1, characterized in that: The slide rail (5) is provided with a limit block (11) at one end near the cylinder (3), and the limit block (11) is fixedly installed on the mounting plate (4).

3. The ball spline shaft drilling fixture according to claim 1, characterized in that: The piston rod end of the cylinder (3) is fixedly installed with one end of a fisheye connector (12), and the movable panel (2) is fixedly connected to a connecting seat (13) on the side near the cylinder (3). The other end of the fisheye connector (12) is connected to the connecting seat (13) through a pin.

4. The ball spline shaft drilling fixture according to claim 1, characterized in that: Two positioning reference plates (14) are fixedly installed at the bottom of the inner cavity of the support base (1). The positioning reference plates (14) correspond to the ball spline shaft (8) and are used to position the lower end of the ball spline shaft (8).

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