A reciprocating rotary device

Abstract

The application discloses a reciprocating and rotating device, which comprises a reciprocating unit and a rotating unit, the reciprocating unit comprises a first driving motor, a spiral shell, a mandrel, a spiral driving rod, a sliding ring, a sliding rod and a mounting bracket, the first driving motor, the spiral shell and the sliding rod are arranged on the mounting bracket, the power output end of the first driving motor is connected with the spiral driving rod, the spiral driving rod is provided with a first spiral guide groove, the inner side of the spiral shell is provided with a second spiral guide groove, the sliding rod is sleeved with the sliding ring, the sliding ring is connected with the mandrel, the mandrel is connected with the rotating unit, the rotating unit is located in the spiral shell, the rotating unit comprises a second driving motor and a connector, and the rotating shaft of the second driving motor is connected with the connector. The spiral track mode is adopted to ensure that the device is small in size, the reciprocating stroke is greatly increased, and space is saved; the double spiral grooves drive the mandrel to drive the rotating unit to reciprocate, and the structure is simple, and the processing and assembling costs are low.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a reciprocating rotary device. Background Technology

[0002] Currently, most reciprocating devices in interventional medical devices are driven by screws, pulleys, and chains.

[0003] In a screw-driven system, the reciprocating motion of the sliding block is achieved through gear meshing between the sliding block and the screw. In a belt-driven system, the rotation of a timing pulley drives the timing belt to reciprocate, thus enabling the reciprocating motion of an object fixed to the timing belt. In a chain-driven system, the rotation of a sprocket drives the chain to reciprocate, similar to the timing pulley and timing belt system.

[0004] For example, the applicant's earlier Chinese patent document with authorization announcement number CN217244847U discloses a patient interface unit for an interventional medical device. The reciprocating device of this interface unit adopts a structure of a lead screw driving a nut and setting a slide rail to cooperate with a slider to realize the reciprocating action of the device.

[0005] The shortcomings and deficiencies of existing technologies: The reciprocating distance of existing technologies is severely limited by the size of transmission components such as lead screws, chains or timing belts. To achieve ultra-long reciprocating distances, too much space is required, resulting in excessive volume and making it unsuitable for use in small, space-constrained areas. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a reciprocating rotary device that is capable of long-distance reciprocating motion, is compact in size, and can rotate, in order to overcome the shortcomings of the prior art.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A reciprocating rotary device includes a reciprocating unit and a rotary unit. The reciprocating unit includes a first drive motor, a helical housing, a mandrel, a helical drive rod, a sliding ring, a sliding rod, and a mounting bracket. The first drive motor, the helical housing, and the sliding rod are mounted on the mounting bracket. The power output end of the first drive motor is connected to the helical drive rod, which is sleeved on the outside of the sliding rod. The outer wall of the helical drive rod has a first helical guide groove, and the inner side of the helical housing has a second helical guide groove. The sliding ring is sleeved on the sliding rod and connected to the mandrel. The mandrel passes through the first and second helical guide grooves and is connected to the rotary unit. The rotary unit is located inside the helical housing. The rotary unit includes a second drive motor and a connector. The shaft of the second drive motor is connected to the connector. The second drive motor directly drives the connector to rotate. The connector connects to an actuator, which can be a guidewire or a rotational imaging core within a catheter, etc.

[0009] Preferably, a rotating bushing is fitted around the outer side of the mandrel, and the rotating bushing contacts the first helical guide groove and the second helical guide groove. By designing the rotating bushing, the sliding friction between the first and second helical guide grooves and the mandrel is changed to rolling friction with the rotating bushing, thereby reducing frictional resistance.

[0010] Preferably, the axis of the second drive motor is located on the tangent of the spiral center line inside the spiral housing tube.

[0011] Preferably, the second drive motor is a hollow shaft drive motor, and the connector is replaced by a three-jaw chuck. The three-jaw chuck is used to fix the actuator, and its rotary reciprocating motion is the same as described above. When the three-jaw chuck is opened, the actuator can also pass through the hollow shaft drive motor and exit from the end of the spiral housing. At this time, the actuator can be manually reciprocated and rotated.

[0012] Preferably, the end of the spiral shell is provided with a limiting frame.

[0013] Preferably, the mounting bracket includes a top cover and a base, with the upper and lower portions of the spiral housing connected to the top cover and the base, respectively. By designing the mounting bracket as a split structure and connecting it to the spiral housing, the device structure becomes more compact, reducing the device's size and overall weight.

[0014] Preferably, the top center of the helical drive rod is fixedly connected to the output shaft of the first drive motor, and the helical drive rod and the sliding rod are concentrically arranged.

[0015] Preferably, the helical drive rod is rotatably connected to the mounting bracket, and a toothed ring is provided on the circumferential side of the helical drive rod. The first drive motor drives the toothed ring through gears, and the helical drive rod and the sliding rod are concentrically arranged. This structure allows both the first drive motor and the helical drive rod to be housed inside the mounting bracket, further saving space.

[0016] Preferably, the front end of the spiral shell is provided with a limiting frame. By setting the limiting frame, the actuator entering and exiting the spiral shell at the front end can be limited, so that the position of the actuator entering and exiting is always located at the center of the pipe channel at the front end of the spiral shell.

[0017] Preferably, the first helical guide groove and the second helical guide groove have opposite rotation directions.

[0018] Preferably, the first helical guide groove and the second helical guide groove have the same direction of rotation, and the second helical guide groove has a larger inclination angle than the first helical guide groove, that is, the pitch of the second helical guide groove is greater than the pitch of the first helical guide groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention ensures that the device is compact while greatly increasing the stroke of reciprocating motion by means of a spiral track, thus saving space.

[0021] (2) The present invention drives the rotating unit to reciprocate through the double helical groove drive spindle. Its structure is simple and the processing and assembly costs are low.

[0022] (3) By setting the rotating unit to a structure of hollow shaft drive motor and three-jaw chuck, the present invention can provide two usage modes: automatic reciprocating rotation and manual reciprocating rotation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the reciprocating rotary device;

[0025] Figure 2 This is a cross-sectional view of the reciprocating rotary device of Example 1;

[0026] Figure 3 This is a cross-sectional view of the reciprocating rotary device of Example 2;

[0027] Figure 4 This is a schematic diagram of the helical drive rod in Example 1;

[0028] Figure 5 This is a schematic diagram of the helical drive rod in Example 2;

[0029] Figure 6 This is a schematic diagram of the rotating component.

[0030] Figure 7 These are schematic diagrams of the rotary joint assemblies in Examples 1 and 2;

[0031] Figure 8 This is a schematic diagram of the structure when the reciprocating rotary device is connected to the actuator.

[0032] Figure 9 This is a schematic diagram of the hollow shaft drive motor and three-jaw chuck in Example 3.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. First drive motor; 2. Top cover; 3. Limiting frame; 4. Spiral housing; 5. Base; 6. Second drive motor; 7. Mandrel; 8. Rotating bushing; 9. Spiral drive rod; 10. Sliding ring; 11. Second spiral guide groove; 12. Sliding rod; 13. Connector; 14. First spiral guide groove; 15. Hollow shaft drive motor; 16. Three-jaw chuck. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] like Figure 1 , Figure 2 , Figure 4 and Figure 8As shown, a reciprocating rotary device includes a reciprocating unit and a rotary unit. The reciprocating unit includes a first drive motor 1, a helical housing 4, a spindle 7, a helical drive rod 9, a sliding ring 10, a sliding rod 12, and a mounting bracket. The first drive motor 1, the helical housing 4, and the sliding rod 12 are mounted on the mounting bracket. The power output end of the first drive motor 1 is connected to the helical drive rod 9. The helical drive rod 9 is sleeved on the outside of the sliding rod 12. A first helical guide groove 14 is provided on the outer wall of the helical drive rod 9. A second helical guide groove 11 is provided on the inner side of the helical housing 4. The sliding ring 10 is sleeved on the sliding rod 12. The sliding ring 10 is connected to the spindle 7. The spindle 7 passes through the first helical guide groove 14 and the second helical guide groove 11. The spindle 7 is connected to the rotary unit, which is located inside the helical housing 4. The rotary unit includes a second drive motor 6 and a connector 13. Figure 7 As shown, the shaft of the second drive motor 6 is connected to the connector 13. The first helical guide groove 14 and the second helical guide groove 11 have opposite rotational directions. The second drive motor 6 directly drives the connector 13 to rotate. The connector 13 is connected to an actuator, which can be a guidewire or an interventional device such as a rotational imaging core inside a catheter.

[0038] like Figure 6 As shown, a rotating sleeve 8 is fitted around the outer side of the mandrel 7. The rotating sleeve 8 can be divided into a first sleeve and a second sleeve. The first sleeve engages with the first helical guide groove 14, and the second sleeve engages with the second helical guide groove 11. By designing the rotating sleeve 8, the sliding friction between the first helical guide groove 14 and the second helical guide groove 11 and the mandrel 7 is changed to rolling friction with the rotating sleeve 8, reducing frictional resistance. At the same time, the sleeve 8 is divided into two parts, the first sleeve and the second sleeve, whose relative movements do not affect each other.

[0039] The axis of the second drive motor 6 is located on the tangent of the spiral center line inside the spiral housing 4 tube.

[0040] like Figure 1 As shown, the mounting bracket includes an upper cover 2 and a base 5, with the upper and lower parts of the spiral housing 4 respectively connected to the upper cover 2 and the base 5. By designing the mounting bracket as a split structure and connecting it to the spiral housing 4, the device structure is made more compact, reducing the device's size and overall weight.

[0041] like Figure 2As shown, the top center of the helical drive rod 9 is fixedly connected to the output shaft of the first drive motor 1, and the helical drive rod 9 is concentrically arranged with the sliding rod 12. Alternatively, the helical drive rod 9 can be rotatably connected to the mounting bracket. The helical drive rod 9 has a toothed ring on its circumference, and the first drive motor 1 drives the toothed ring via gears. This structure allows both the first drive motor 1 and the helical drive rod 9 to be housed inside the mounting bracket, further saving space.

[0042] like Figure 1 and Figure 8 As shown, a limiting frame 3 is provided at the front end of the spiral housing 4. By setting the limiting frame 3, the actuator entering and exiting the spiral housing 4 at the front end can be limited, so that the position of the actuator entering and exiting is always located at the center of the pipe channel at the front end of the spiral housing 4.

[0043] Combination Figure 2 and Figure 8 The actuator is fixedly connected to the connector 13, and the second drive motor 6 drives the actuator to rotate. At the same time, the first drive motor 1 drives the screw drive rod 9 to rotate clockwise (top view). The screw drive rod 9 drives the rotating bushing 8 to roll through the first screw guide groove 14. The rotating bushing 8 then drives the spindle 7 and the rotating unit fixedly connected to the spindle 7 to move clockwise along the second screw guide groove 11 (top view). This causes the actuator to move clockwise within the screw housing 4, pulling the actuator into the screw housing 4. In this way, the actuator retracts while also rotating. After the first drive motor 1 rotates clockwise (top view) for a certain period of time, the first drive motor 1 then drives the screw drive rod 9 to rotate counterclockwise (top view). The screw drive rod 9 drives the rotating bushing 8 to roll through the first screw guide groove 14. The rotating bushing 8 then drives the spindle 7 and the rotating unit fixedly connected to the spindle 7 to move counterclockwise along the second screw guide groove 11 (top view), thereby driving the actuator to move counterclockwise (top view) inside the screw housing 4 and pushing the actuator out of the screw housing 4. In this way, the actuator is extended and rotated at the same time.

[0044] The advantage of the double helical groove is that one groove (first helical guide groove 14) serves as the power output structure, and the other groove (second helical guide groove 11) serves as the spatial motion restriction structure. Together with the positioning and guiding function of the sliding rod 12 at the center position, it more accurately ensures that the movement of the reciprocating unit in the helical shell 4 does not interfere with the helical shell 4, thereby ensuring that the reciprocating motion is smoother and unobstructed.

[0045] Example 2

[0046] like Figure 3 and Figure 5As shown, this embodiment differs from Embodiment 1 in that the first helical guide groove 14 and the second helical guide groove 11 have the same rotation direction, and the second helical guide groove 14 has a larger tilt angle than the first helical guide groove 11, meaning the pitch of the second helical guide groove 14 is greater than the pitch of the first helical guide groove 11. Similar to Embodiment 1, the second drive motor 6 drives the connector 13 to rotate. The connector 13 connects to the actuator.

[0047] Example 3

[0048] like Figures 8 to 9 As shown, in this embodiment, the second drive motor 6 of Embodiments 1 and 2 is set as a hollow shaft drive motor 15, and the connector 13 is a three-jaw chuck 16. The three-jaw chuck 16 is used to fix the actuator, and its rotary reciprocating motion is the same as described above. When the three-jaw chuck 16 is opened, the actuator can also pass through the hollow shaft drive motor 15 and exit from the end of the spiral housing 4. At this time, the actuator can be manually reciprocated and rotated. Thus, this embodiment can realize free switching between automatic and manual reciprocating rotational motion, making operation more convenient.

[0049] The embodiments of the present invention have been described in detail above through examples, but the content described is only an exemplary embodiment of the present invention and should not be considered as limiting the scope of implementation of the present invention. The protection scope of the present invention is defined by the claims. Any technical solutions designed by those skilled in the art using the technical solutions described in the embodiments of the present invention, or designed by those skilled in the art under the inspiration of the technical solutions of the embodiments of the present invention, within the substance and protection scope of the present invention, to achieve the above-mentioned technical effects, or any equivalent changes and improvements made to the scope of the application, should still fall within the patent protection scope of the present invention.

Claims

1. A reciprocating rotary device, characterized in that, The system includes a reciprocating unit and a rotating unit. The reciprocating unit includes a first drive motor (1), a spiral housing (4), a spindle (7), a spiral drive rod (9), a sliding ring (10), a sliding rod (12), and a mounting bracket. The first drive motor (1), the spiral housing (4), and the sliding rod (12) are mounted on the mounting bracket. The power output end of the first drive motor (1) is connected to the spiral drive rod (9). The spiral drive rod (9) is sleeved on the outside of the sliding rod (12). The outer wall of the spiral drive rod (9) is provided with a first spiral guide groove (14). The inner side of the spiral housing (4) A second spiral guide groove (11) is provided, and a sliding ring (10) is sleeved on the sliding rod (12). The sliding ring (10) is connected to the mandrel (7). The mandrel (7) passes through the first spiral guide groove (14) and the second spiral guide groove (11). The mandrel (7) is connected to the rotating unit, which is located inside the spiral housing (4). The rotating unit includes a second drive motor (6) and a connector (13). The shaft of the second drive motor (6) is connected to the connector (13). The first spiral guide groove (14) and the second spiral guide groove (11) have opposite directions of rotation. Alternatively, the first spiral guide groove (14) and the second spiral guide groove (11) may have the same direction of rotation, and the second spiral guide groove (14) may have a larger tilt angle than the first spiral guide groove (11).

2. The reciprocating rotary device according to claim 1, characterized in that, A rotating bushing (8) is fitted on the outer side of the mandrel (7), and the rotating bushing (8) is in contact with the first spiral guide groove (14) and the second spiral guide groove (11).

3. The reciprocating rotary device according to claim 1, characterized in that, The axis of the second drive motor (6) is located on the tangent of the spiral center line inside the spiral housing (4) tube.

4. The reciprocating rotary device according to claim 1, characterized in that, The second drive motor (6) is a hollow shaft drive motor (15), and the connector (13) is a three-jaw chuck (16).

5. The reciprocating rotary device according to claim 1, characterized in that, The end of the spiral shell (4) is provided with a limiting frame (3).

6. The reciprocating rotary device according to claim 1, characterized in that, The mounting bracket includes an upper cover (2) and a base (5), and the upper and lower parts of the spiral shell (4) are respectively connected to the upper cover (2) and the base (5).

7. The reciprocating rotary device according to claim 1, characterized in that, The top center of the spiral drive rod (9) is fixedly connected to the output shaft of the first drive motor (1), and the spiral drive rod (9) and the sliding rod (12) are concentrically arranged.

8. The reciprocating rotary device according to claim 1, characterized in that, The spiral drive rod (9) is rotatably connected to the mounting bracket. The spiral drive rod (9) has a toothed ring on its circumference. The first drive motor (1) drives the toothed ring through gears. The spiral drive rod (9) and the sliding rod (12) are concentrically arranged.

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