An adjustable rotary ball spline based on self-locking

Abstract

The present invention belongs to the technical field of rotary ball splines, and particularly relates to an adjustable rotary ball spline based on self-locking, which includes a packaging machine and a ball spline mechanism. The packaging machine includes a support plate, a connecting plate, a slide rail, a slider, a undulating plate, a driving cavity, and a packaging box. The packaging box includes a packaging cylinder and a cover. The packaging cylinder is threadedly connected to the cover, and a hexagonal hole is provided on the upper surface of the cover. The ball spline mechanism includes a spline shaft and a ball nut. Grooves are provided on both sides of the spline shaft. The ball nut is sleeved outside the spline shaft through the grooves. The upper end of the spline shaft is rotatably connected to the bottom surface of the undulating plate. The ball nut is installed on the connecting plate by bearings. A hexagonal screw block is fixed at the bottom end of the spline shaft. The slide rail is fixedly installed on the support plate. The slider is slidably connected in the slide rail. This device solves the problem that the current ball spline cannot improve the packaging efficiency and packaging quality when applied to a packaging machine.

Description

Technical Field

[0001] The present invention belongs to the technical field of rotary ball splines, and particularly relates to an adjustable rotary ball spline based on self-locking. Background Art

[0002] Rotary ball splines are generally used in medical devices or packaging equipment. Packaging equipment has a wide range of applications, including packaging boxes with lids. Generally, products are placed in the packaging box and then the lid is covered. To ensure the tightness of the product, the lid is screwed into the box in a spiral manner, and then sealed through a threaded connection. This kind of packaging equipment requires the use of a rotary ball spline, which can move up and down and rotate, and perform high-efficiency automated self-locking packaging work.

[0003] For this packaging method, the locking strength needs to be ensured. Generally, there will be insufficient locking force, resulting in reduced tightness, or instability during the threaded connection of the packaging box, and the phenomenon of thread jamming. This phenomenon has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to provide an adjustable rotary ball spline based on self-locking to solve the problems mentioned in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solution: An adjustable rotary ball spline based on self-locking, comprising a packaging machine and a ball spline mechanism. The packaging machine includes a support plate, a connecting plate, a slide rail, a slider, a corrugated plate, a drive cavity, and a packaging box. The packaging box includes a packaging cylinder and a cover. The packaging cylinder is threadedly connected to the cover, and a hexagonal hole is provided on the upper surface of the cover.

[0006] The ball spline mechanism includes a spline shaft and a ball nut. Grooves are provided on both sides of the spline shaft. The ball nut is sleeved outside the spline shaft through the grooves. The upper end of the spline shaft is rotatably connected to the bottom surface of the corrugated plate. The ball nut is installed on the connecting plate through a bearing. A hexagonal screw block is fixed to the bottom end of the spline shaft. The slide rail is fixedly installed on the support plate. The slider is slidably connected in the slide rail and is fixedly connected to the corrugated plate. The drive cavity is fixedly installed on the support plate and is located below the slide rail. A first gear is fixed to the outside of the ball nut. A rotating rod is installed on the bottom of the drive cavity through a bearing. A second gear is fixed to the lower end of the rotating rod. The second gear meshes with the first gear. A connecting rod is installed on the lower end of the slider through a bearing.

[0007] The present invention is further described as follows. The driving cavity includes a motor and a hydraulic cavity. The rotating rod is fixedly connected to the output end of the motor. The motor is fixedly installed at the top of the inner wall of the driving cavity. The hydraulic cavity is fixedly installed above the inner wall of the driving cavity, and a hydraulic plate is slidably connected to the inner wall of the hydraulic cavity. The upper and lower parts of the hydraulic cavity are both connected to an external hydraulic pump through pipelines.

[0008] A threaded rod is fixed to the lower end of the connecting rod. A threaded hole is provided in the middle of the hydraulic plate. The threaded rod is threadedly connected to the threaded hole. Hydraulic oil is filled above and below the hydraulic plate.

[0009] The present invention is further described as follows. A support rod is fixed to the bottom end of the threaded rod. An elastic telescopic joint is fixed to the lower end of the support rod. A rotating shaft is fixed to the lower end of the elastic telescopic joint. A third gear is fixed to the lower end of the rotating shaft. The rotating shaft is connected to the bottom of the inner wall of the driving cavity through a bearing. Grooves are provided on both the front and rear sides of the hydraulic plate. Guide rails are fixedly installed on both the front and rear inner walls of the hydraulic cavity. The hydraulic plate is slidably connected to the guide rails through the grooves. The third gear meshes with the second gear.

[0010] The present invention is further described as follows. A socket block and a disc are sleeved on the outer side of the rotating rod. The disc is located above the socket block, and a elastic spring is fixed between the two. A limiting block is provided at the bottom of the socket block and is fixed to the outer side of the rotating rod. Extrusion rods are evenly fixed around the surface of the disc. An arc disc is fixed to the outer side of the support rod. The arc disc is located above the extrusion rods and contacts the extrusion rods after moving downward. The bottom of the arc disc is arc-shaped.

[0011] The present invention is further described as follows. The upper end of the extrusion rod is spherical. The elasticity of the elastic telescopic joint is four times that of the elastic spring.

[0012] The present invention is further described as follows. Chutes are provided on both the left and right sides of the rotating rod. A jacking disc is slidably connected to the inner wall of the chute. Impact rods are evenly fixed to the bottom of the jacking disc. The bottom ends of the impact rods are spherical.

[0013] The present invention is further described as follows. The bottom end of the impact rod is in contact with the surface of the disc.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The ball spline adopted by the present invention is applied to a packaging machine for self-locking packaging work. The automatic operation is convenient and fast, improving the packaging efficiency. And by adjusting the rotation speed of the motor, the tightening strength is increased, ensuring the packaging quality. During the rotation of Gear II, the connecting rod moves downward, causing the hexagonal screw block to gradually move downward. As the cap is connected to the packaging cylinder, the cap gradually descends, causing the hexagonal screw block to descend accordingly, avoiding detachment and ensuring the locking strength. And when Gear II drives Gear III to rotate, through the connection between the threaded rod and the threaded hole, after rotating several circles, the hexagonal screw block will not descend excessively and remains synchronous, further improving the packaging quality.

[0015] By slightly jittering the support rod up and down, it can be avoided that the pressure of the hexagonal screw block on the hexagonal hole of the cap is too large, resulting in a large force required by the motor, preventing the increase in energy consumption. And it can avoid the low locking strength leading to poor sealing of the packaging box, playing a role in improving the packaging quality. By jittering, the force exerted by the hexagonal screw block on the hexagonal hole of the cap is first loose and then tight. On the one hand, it ensures the rotational force of the cap, thereby increasing the locking strength. On the other hand, it avoids the large tightness between the threads, resulting in jamming and affecting the smooth operation of the packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0017] Figure 1 is the overall structural schematic diagram of the present invention;

[0018] Figure 2 is the structural schematic diagram of the ball spline mechanism of the present invention;

[0019] Figure 3 is the front view of the present invention;

[0020] Figure 4 is the internal structural schematic diagram of the drive cavity of the present invention;

[0021] Figure 5 is the plan view of the drive cavity of the present invention;

[0022] Figure 6 is the schematic diagram of the rotating rod and the structure on the rotating rod of the present invention;

[0023] Figure 7 is the internal structural schematic diagram of the hydraulic cavity of the present invention;

[0024] Figure 8 is the schematic diagram of the installation position of the disc of the present invention;

[0025] In the figure: 1. Support plate; 2. Connecting plate; 3. Slide rail; 31. Slide block; 32. Undulating plate; 33. Connecting rod; 331. Threaded rod; 34. Support rod; 341. Arc disk; 35. Elastic telescopic joint; 36. Rotating shaft; 37. Gear three; 4. Driving cavity; 41. Rotating rod; 411. Socket block; 412. Disk; 413. Extrusion rod; 414. Chute; 415. Jacking disk; 416. Impact rod; 417. Elastic spring; 42. Gear two; 43. Motor; 44. Hydraulic cavity; 441. Hydraulic plate; 442. Groove; 443. Guide rail; 5. Spline shaft; 51. Channel; 52. Hexagonal screw block; 6. Ball nut; 61. Gear one. Detailed implementation manners

[0026] The technical solution of the present invention will be further described in detail below in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1 - 8 , the present invention provides a technical solution: An adjustable rotary ball spline based on self-locking, including a packaging machine and a ball spline mechanism. The packaging machine includes a support plate 1, a connecting plate 2, a slide rail 3, a slide block 31, an undulating plate 32, a driving cavity 4 and a packaging box. The packaging box includes a packaging cylinder and a cover. The packaging cylinder is threadedly connected to the cover, and a hexagonal hole is provided on the upper surface of the cover;

[0028] The ball spline mechanism includes a spline shaft 5 and a ball nut 6. Channel grooves 51 are provided on both sides of the spline shaft 5. The ball nut 6 is sleeved outside the spline shaft 5 through the channel grooves 51. The upper end of the spline shaft 5 is rotatably connected to the bottom surface of the undulating plate 32. The ball nut 6 is installed on the connecting plate 2 by bearings. A hexagonal screw block 52 is fixed at the bottom end of the spline shaft 5. The slide rail 3 is fixedly installed on the support plate 1. The slide block 31 is slidably connected in the slide rail 3 and is fixedly connected to the undulating plate 32. The driving cavity 4 is fixedly installed on the support plate 1 and is located below the slide rail 3. A gear one 61 is fixed on the outside of the ball nut 6. A rotating rod 41 is installed on the bottom of the driving cavity 4 by bearings. A gear two 42 is fixed at the lower end of the rotating rod 41. The gear two 42 meshes with the gear one 61. The lower end of the slide block 31 is installed with a connecting rod 33 by bearings.

[0029] The driving cavity 4 includes a motor 43 and a hydraulic cavity 44. The rotating rod 41 is fixedly connected to the output end of the motor 43. The motor 43 is fixedly installed on the top of the inner wall of the driving cavity 4. The hydraulic cavity 44 is fixedly installed above the inner wall of the driving cavity 4. A hydraulic plate 441 is slidably connected to the inner wall of the hydraulic cavity 44. The upper and lower parts of the hydraulic cavity 44 are connected to an external hydraulic pump through pipelines;

[0030] A threaded rod 331 is fixed to the lower end of the connecting rod 33. A threaded hole is provided in the middle of the hydraulic plate 441, and the threaded rod 331 is threadedly connected to the threaded hole. Hydraulic oil is filled above and below the hydraulic plate 441.

[0031] Place the packaging box on the support plate 1. Then, first inject hydraulic oil into the upper part of the hydraulic chamber 44 through an external hydraulic pump and extract the hydraulic oil below, so that the hydraulic pressure above the hydraulic plate 441 increases and the hydraulic pressure below decreases. The hydraulic plate 441 slides downward along the inner wall of the hydraulic chamber 44 under the force. The hydraulic plate 441 drives the slider 31 to slide downward along the inner wall of the slide rail 3 through the connecting rod 33. The slider 31 drives the spline shaft 5 to move downward through the undulating plate 32. The spline shaft 5 makes the ball nut 6 roll on its surface through the channels 51 on both sides. The spline shaft 5 drives the hexagonal nut block 52 to move downward until it is inserted into the hexagonal hole of the cover. Then, drive the motor 43 to operate. The motor 43 drives the second gear 42 to rotate through the rotating rod 41. The second gear 42 drives the ball nut 6 to rotate through the engagement with the first gear 61, thereby driving the spline shaft 5 to rotate. The spline shaft 5 drives the hexagonal nut block 52 to rotate, thereby driving the cover to rotate. The cover is threadedly connected to the packaging cylinder to perform self-locking packaging work. The automated operation is convenient and fast, improving the packaging efficiency. And by adjusting the rotation speed of the motor 43, the tightening strength is improved to ensure the packaging quality.

[0032] A support rod 34 is fixed to the bottom end of the threaded rod 331. A resilient telescopic joint 35 is fixed to the lower end of the support rod 34. A rotating shaft 36 is fixed to the lower end of the resilient telescopic joint 35. A third gear 37 is fixed to the lower end of the rotating shaft 36. The rotating shaft 36 is connected to the bottom of the inner wall of the drive chamber 4 by a bearing.

[0033] Grooves 442 are provided on both the front and rear sides of the hydraulic plate 441. Guide rails 443 are fixed to the front and rear inner walls of the hydraulic chamber 44. The hydraulic plate 441 is slidably connected to the guide rails 443 through the grooves 442. The third gear 37 meshes with the second gear 42.

[0034] During the rotation of the second gear 42, the third gear 37 is driven to rotate through the engagement. The third gear 37 drives the rotating shaft 36 to rotate. The rotating shaft 36 drives the support rod 34 to rotate through the resilient telescopic joint 35. The support rod 34 drives the threaded rod 331 and the connecting rod 33 to rotate. During the rotation of the threaded rod 331, through the connection with the threaded hole, it moves downward while rotating. And through the guide rail 443 and the groove 442, the hydraulic plate 441 can be prevented from rotating, so that the threaded rod 331 can move downward smoothly. At the same time, the resilient telescopic joint 35 is compressed and shortened. At this time, the downward movement of the connecting rod 33 can make the hexagonal nut block 52 move downward step by step. As the cover is connected to the packaging cylinder, the cover gradually descends, so that the hexagonal nut block 52 also descends accordingly, avoiding detachment and ensuring the locking strength.

[0035] When the second gear 42 drives the third gear 37 to rotate, through the connection between the threaded rod 331 and the threaded hole, after rotating several circles, the hexagonal screw block 52 will not drop excessively and will remain synchronized, so as to further improve the packaging quality.

[0036] A socket block 411 and a disc 412 are sleeved on the outer side of the rotating rod 41. The disc 412 is located above the socket block 411, and a elastic spring 417 is fixed between the two. A limiting block is arranged at the bottom of the socket block 411 and is fixed on the outer side of the rotating rod 41. Extrusion rods 413 are evenly fixed around the surface of the disc 412. An arc disc 341 is fixed on the outer side of the support rod 34. The arc disc 341 is located above the extrusion rods 413, and after the arc disc 341 moves downward, it comes into contact with the extrusion rods 413. The bottom of the arc disc 341 is arc-shaped.

[0037] The upper end of the extrusion rod 413 is spherical, and the elasticity of the elastic telescopic joint 35 is four times that of the elastic spring 417.

[0038] During the packaging process, the cover rotates and is tightly connected to the packaging cylinder. Through the meshing of the second gear 42 and the third gear 37, the hexagonal screw block 52 slowly descends. At this time, the support rod 34 drives the arc disc 341 to move downward and contact the upper end of the extrusion rod 413. At the same time, the rotating rod 41 is in a rotating state, driving the extrusion rod 413 to rotate through the disc 412. When the extrusion rod 413 rotates to contact the arc disc 341, it squeezes and rubs against the arc-shaped part at the bottom of the arc disc 341. Since the elasticity of the elastic telescopic joint 35 is large and the elasticity of the elastic spring 417 is small, the arc disc 341 presses the extrusion rod 413. The extrusion rod 413 presses the elastic spring 417 to deform through the disc 412. At the same time, the arc disc 341 receives an upward force and thus moves slightly upward. After that, the extrusion rod 413 disengages from the arc disc 341, and the elastic telescopic joint 35 deforms and returns to its original state, causing the support rod 34 to vibrate slightly up and down. This can prevent the large pressure of the hexagonal screw block 52 on the hexagonal hole of the cover from resulting in a large force required by the motor 43, prevent the increase in energy consumption, and avoid the poor sealing of the packaging box due to low locking strength, playing a role in improving the packaging quality.

[0039] Through the vibration, the force exerted by the hexagonal screw block 52 on the hexagonal hole of the cover is first loose and then tight. On the one hand, it ensures the rotational force of the cover, thereby improving the locking strength. On the other hand, it avoids the large tightness between the threads, which may cause jamming and affect the smooth operation of the packaging.

[0040] Chute grooves 414 are opened on both the left and right sides of the rotating rod 41. The inner wall of the chute grooves 414 is slidably connected with a jacking disc 415. Impact rods 416 are evenly fixed at the bottom of the jacking disc 415, and the bottom ends of the impact rods 416 are spherical.

[0041] The bottom end of the impact rod 416 fits with the surface of the disc 412.

[0042] Through the above steps, when the disc 412 is forced to move downward, the elastic spring 417 is deformed under force. When the extrusion rod 413 is disengaged from the arc disc 341, the elastic spring 417 generates a reaction force, pushing the disc 412 to move upward rapidly, and hitting the impact rod 416 at the bottom of the lifting disc 415. The lifting disc 415 slides on the chute 414 under force, then resets downward and hits the disc 412 again. The double impact causes the whole packaging machine to vibrate. During the vibration, the threaded part connecting the capping and the packaging cylinder can be relatively loosened, thereby further avoiding the jamming phenomenon and improving the packaging smoothness.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0044] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable rotating ball spline based on self-locking, comprising a packaging machine and a ball spline mechanism, characterized in that: The packaging machine comprises a support plate (1), a connecting plate (2), a slide rail (3), a slider (31), an undulating plate (32), a drive chamber (4), and a packaging box; the packaging box comprises a packaging tube and a sealing cover; the packaging tube is threadably connected to the sealing cover, and a hexagonal hole is provided on the upper surface of the sealing cover; The ball spline mechanism comprises a spline shaft (5) and a ball nut (6), grooves (51) are provided on both sides of the spline shaft (5), the ball nut (6) is sleeved on the outer side of the spline shaft (5) through the grooves (51), the upper end of the spline shaft (5) is rotatably connected to the bottom surface of the undulating plate (32), the ball nut (6) bearing is mounted on the connecting plate (2), a hexagonal screw block (52) is fixed to the bottom end of the spline shaft (5), the slide rail (3) is fixedly mounted on the support plate (1), the slider (31) is slidably connected in the slide rail (3) and is fixedly connected to the undulating plate (32), the drive chamber (4) is fixedly mounted on the support plate (1) and is located below the slide rail (3), and the outer side of the ball nut (6) is fixedly mounted The driving chamber (4) comprises a first tooth (61), a rotating rod (41) being installed at the bottom bearing of the driving chamber (4), a second tooth (42) being fixed at the lower end of the rotating rod (41), the second tooth (42) being meshed with the first tooth (61), a connecting rod (33) being installed at the lower end bearing of the slider (31), the driving chamber (4) comprising a motor (43) and a hydraulic chamber (44), the rotating rod (41) being fixedly connected to the output end of the motor (43), the motor (43) being fixedly installed at the top of the inner wall of the driving chamber (4), the hydraulic chamber (44) being fixedly installed above the inner wall of the driving chamber (4), and a hydraulic plate (441) being slidably connected to the inner wall of the hydraulic chamber (44), and the upper and lower parts of the hydraulic chamber (44) are both connected to an external hydraulic pump pipeline; A threaded rod (331) is fixed to the lower end of the connecting rod (33), a threaded hole is provided in the middle of the hydraulic plate (441), the threaded rod (331) is threadedly connected to the threaded hole, the upper and lower parts of the hydraulic plate (441) are filled with hydraulic oil, a support rod (34) is fixed to the bottom end of the threaded rod (331), an elastic expansion joint (35) is fixed to the lower end of the support rod (34), a rotating shaft (36) is fixed to the lower end of the elastic expansion joint (35), a gear (37) is fixed to the lower end of the rotating shaft (36), and the rotating shaft (36) is connected to a bearing at the bottom of the inner wall of the driving chamber (4); The front and rear sides of the hydraulic plate (441) are both provided with grooves (442), the front and rear inner walls of the hydraulic chamber (44) are both fixed with guide rails (443), the hydraulic plate (441) is slidably connected to the guide rails (443) via the grooves (442), and the tooth three (37) is meshed with the tooth two (42).

2. The self-locking adjustable rotating ball spline according to claim 1, characterized in that: The outer side of the rotating rod (41) is sleeved with a sleeve block (411) and a disc (412); the disc (412) is located above the sleeve block (411), and a spring (417) is fixed between the sleeve block (411); a limit block is provided at the bottom of the sleeve block (411), and the limit block is fixed to the outer side of the rotating rod (41); extrusion rods (413) are evenly fixed around the surface of the disc (412); an arc disc (341) is fixed to the outer side of the support rod (34); the arc disc (341) is located above the extrusion rod (413), and the arc disc (341) contacts the extrusion rod (413) after moving downward; the bottom of the arc disc (341) is arc-shaped.

3. The self-locking adjustable rotating ball spline according to claim 2, characterized in that: The upper end of the extrusion rod (413) is spherical, and the elasticity of the elastic expansion joint (35) is four times the elasticity of the elastic spring (417).

4. The self-locking adjustable rotating ball spline according to claim 3 is characterized in that: The left and right sides of the rotating rod (41) are both provided with sliding grooves (414), the inner wall of the sliding groove (414) is slidably connected to a lifting plate (415), and the bottom of the lifting plate (415) is evenly fixed with impact rods (416), and the bottom end of the impact rod (416) is spherical.

5. The self-locking adjustable rotating ball spline according to claim 4, characterized in that: The bottom end of the impact rod (416) is in contact with the surface of the disc (412).

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