Movable joint of traction frame

Abstract

The utility model relates to the technical field of traction frames, in particular to a traction frame movable joint which comprises a movable arm, and the movable arm and a pin shaft are vertically connected in a fixed structure mode. A fixed arm is arranged on one side of the movable arm, a vertical pin shaft hole is formed in the fixed arm, the pin shaft is sleeved with the vertical pin shaft hole, a locking sleeve is arranged on the side, away from the movable arm, of the fixed arm, a threaded hole meshed with the pin shaft in a threaded mode is formed in the locking sleeve, and a mounting cavity communicated with the outside is formed in the lower portion of the locking sleeve. The lower end face of the pin shaft is provided with the cushion block in a fixed structure mode, the outer wall of the cushion block protrudes out of the peripheral wall of the threaded hole, the traction frame can prevent the operation handle at the connecting position of the traction frame from loosening or disengaging, and stability of the frame body is improved.

Description

Technical field:

[0001] The present application relates to the technical field of traction frames, and in particular to a movable joint of a traction frame. Background technology:

[0002] The traction frame is a necessary surgical instrument in orthopedic traction surgery. By adjusting the traction frame, the patient can achieve a good reduction effect under the fluoroscopy of the C-arm machine. Moreover, the traction frame needs to be fixed after adjustment to avoid changing the patient's position, which requires the traction frame to have a certain stability.

[0003] The connection between the existing traction frame and the operating handle is mostly a threaded engagement connection. Since this design has no limiting measures for the operating handle, when adjusting the body position, the operating handle may be accidentally unscrewed from the connection due to excessive force, thereby affecting the stability of the frame and increasing the risk of secondary injury to the patient; and the operating handle needs to be retightened after being unscrewed. However, since the operating handle is under the traction frame, when retightening it, the medical staff needs to extend their body under the traction frame and align the operating handle with the threaded hole under the traction frame, which is very inconvenient. Utility model content:

[0004] In order to solve the above technical problems, the utility model provides a traction frame movable joint, which solves the technical problem that: the operating handle is unscrewed from the bottom of the traction frame by excessive force, thereby affecting the stability of the frame; and it is very inconvenient to enter the traction frame to re-tighten it. In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] The traction frame movable joint includes:

[0006] movable arm;

[0007] A pin shaft, the pin shaft is connected to the movable arm in a fixed structure manner along the vertical direction;

[0008] A fixed arm with a pin hole, the pin hole is sleeved outside the pin, and the pin passes through the fixed arm and extends downward;

[0009] The locking sleeve has a threaded hole in the interior thereof which is engaged with the thread of the pin shaft, and a mounting cavity which is communicated with the outside is formed at the lower part of the locking sleeve, and the lower end of the pin shaft extends into the mounting cavity;

[0010] A cushion block is arranged on the lower end surface of the pin in a fixed structure, and an outer wall of the cushion block protrudes from a peripheral wall of the threaded hole;

[0011] An operating rod is horizontally passed through the installation cavity and arranged below the cushion block.

[0012] Furthermore, the movable arm includes a frame body, a rotating joint is arranged at the rear of the frame body in a fixed structure manner, the rotating joint is provided with a through hole, and the through hole is connected to the pin shaft by an interference fit manner.

[0013] Furthermore, the fixed arm includes a fixed joint, and a slot is provided on a side of the fixed joint away from the frame in a fixed structural manner.

[0014] Furthermore, both the upper end surface of the fixed joint and the lower end surface of the rotating joint are provided with saw teeth in a mutually engaging structure.

[0015] Furthermore, a cavity is provided on the upper end surface of the fixed joint and the lower end surface of the rotating joint, a compression spring is provided in the cavity, and the compression spring is sleeved on the outside of the pin shaft.

[0016] Furthermore, grooves are provided on the upper portion of the locking sleeve and the lower portion of the fixed joint, and a plane bearing is provided in the groove, and the plane bearing sleeve is arranged outside the pin shaft.

[0017] Furthermore, a wear-resistant sleeve is provided between the pin shaft and the fixed joint.

[0018] Furthermore, the installation cavity is communicated with the threaded hole; a screw for fixing the cushion block is arranged on the lower end surface of the pin shaft, and one end of the screw passes through the cushion block and is engaged with the thread of the pin shaft.

[0019] Furthermore, the operating rod is a stud bolt, and nuts are threadedly connected on both sides of the stud bolt.

[0020] The beneficial effects of the utility model are:

[0021] 1. By setting the pad, the locking sleeve will be restricted by the pad and stop from being screwed down after being screwed down for a certain distance, thereby preventing the locking sleeve from being separated from the pin and improving the structural stability;

[0022] 2. By setting screws, the combination of the pin shaft and the cushion block is changed from an integrated type to a split type, making the assembly of the locking sleeve more convenient;

[0023] 3. By setting a compression spring, when the movable arm needs to adjust the angle, an upward force can be given to the rotating joint to separate the teeth of the rotating joint and the fixed joint, thereby facilitating the rotation of the movable arm and adjusting the angle. Description of the drawings:

[0024] Figure 1 It is a partial structural cross-sectional schematic diagram of the utility model.

[0025] Figure 2 yes Figure 1 The schematic diagram of the pin, gasket and screw structure is omitted.

[0026] Figure 3This is a three-dimensional structural diagram of the utility model

[0027] In the figure:

[0028] 1. Frame, 2. Rotating joint, 3. Pin, 4. Locking sleeve, 5. Fixed joint, 6. Screw, 7. Spacer, 8. Compression spring, 9. Operating lever, 10. Plane bearing, 11. Wear-resistant sleeve, 12. Slot, 13. Threaded hole, 14. Installation cavity. Specific implementation method:

[0029] In order to make the purpose, technical scheme and advantages of the implementation of the utility model clearer, the utility model will now be further described in detail with reference to the accompanying drawings and the following examples so that the public can better understand the implementation method of the utility model. The specific implementation scheme of the utility model is as follows:

[0030] The movable joint of the traction frame includes a movable arm, which is vertically connected to the pin shaft 3 in a fixed structure; a fixed arm is arranged on one side of the movable arm, a vertical pin shaft hole is arranged inside the fixed arm, and the vertical pin shaft hole is sleeved outside the pin shaft 3, and the movable arm can rotate around the pin shaft 3 to adjust the angle between the movable arm and the fixed arm; a locking sleeve 4 is arranged on the side of the fixed arm away from the movable arm, and a threaded hole 13 is arranged inside the locking sleeve 4 to be threadedly engaged with the pin shaft 3. When the pin shaft 3 is subjected to an upward force, the force is transmitted to the locking sleeve through the pin shaft 3. 4, driving the locking sleeve 4 to move upward, while the locking sleeve 4 is restricted by the fixed joint 5 and cannot move upward, so the pin 3 cannot move upward due to the existence of the locking sleeve 4, thereby fixing the pin 3 in the pin hole; the lower end surface of the pin 3 is provided with a gasket 7 in a fixed structure manner, and the outer wall of the gasket 7 protrudes from the peripheral wall of the threaded hole 13, so after the locking sleeve 4 is screwed out for a distance, it will contact with the gasket 7, thereby preventing the locking sleeve 4 from continuing to screw downward, avoiding the locking sleeve 4 from being separated from the pin 3, and improving the structural stability.

[0031] Specifically, the movable arm includes a frame body 1, a rotating joint 2 is arranged at the rear of the frame body 1 in a fixed structure, the rotating joint 2 is provided with a through hole, and the through hole is connected to the pin shaft 3 by an interference fit, so as to facilitate the replacement of the pin shaft 3 when it is severely worn.

[0032] It should be noted that the fixed arm includes a fixed joint 5, and a slot 12 is provided in a fixed structure manner on the side of the fixed joint 5 away from the frame 1 for buckling the side rail of the operating table to achieve fixation with the operating table and facilitate subsequent adjustment of the angle of the movable arm.

[0033] Preferably, the upper end surface of the fixed joint 5 and the lower end surface of the rotating joint 2 are both provided with serrations in a mutually interlocking structure, and a cavity is opened on the upper end surface of the fixed joint 5 and the lower end surface of the rotating joint 2, and a compression spring 8 is arranged in the cavity, and the compression spring 8 is sleeved on the outside of the pin shaft 3. The provision of the serrations can prevent the fixed joint 5 from rotating on its own, and can provide additional friction when the fixed joint 5 rotates, thereby preventing the fixed joint 5 from rotating too fast and improving the accuracy of adjusting the position of the frame 1; when disassembling the fixed joint 5, since the lower end surface of the rotating joint 2 has a serration structure that engages with the upper end surface of the fixed joint 5, when the movable arm needs to rotate to adjust the angle, it will be affected by the friction force and become difficult to rotate. The provision of the compression spring 8 can give the rotating joint 2 an upward force to separate the rotating joint 2 from the fixed joint 5, thereby facilitating the rotation of the movable arm and adjusting the angle.

[0034] Furthermore, grooves are provided on the upper part of the locking sleeve 4 and the lower part of the fixed joint 5, and a plane bearing 10 is provided in the groove. The plane bearing 10 is sleeved on the outside of the pin shaft 3. The plane bearing 10 can withstand very high axial pressure and can be used as a buffer between the locking sleeve 4 and the fixed joint 5. In addition, the friction resistance of the plane bearing 10 is smaller in the process of bearing load, which can reduce the wear of the fixed joint 5 and the locking sleeve 4 and extend the service life of the fixed joint 5 and the locking sleeve 4.

[0035] It should be explained that a wear-resistant sleeve 11 is provided between the pin shaft 3 and the fixed joint 5 to avoid wear caused by long-term direct contact between the fixed joint 5 and the pin shaft 3 and to increase the service life of the fixed joint 5 and the pin shaft 3.

[0036] Specifically, the installation cavity 14 is connected to the threaded hole 13, and a screw 6 for fixing the cushion block 7 is provided on the lower end surface of the pin shaft 3. One end of the screw 6 passes through the cushion block 7 and is threadedly engaged with the pin shaft 3. By providing the screw 6, the combination of the pin shaft 3 and the cushion block 7 is transformed from an integrated type to a split type, making the installation and removal of the pin shaft 3 more convenient.

[0037] The lower part of the locking sleeve 4 is provided with an installation cavity 14 connected to the outside world; an operating rod 9 is provided below the cushion block 7 and horizontally passes through the installation cavity 14. The operating rod 9 is a stud bolt, and nuts are connected by threads on both sides. The nuts at both ends are detachable, so that the operating rod 9 can be easily pulled out from the round hole.

[0038] The working principle and working process of the utility model are as follows:

[0039] When installing, first sleeve one end of the pin shaft 3 into the through hole of the rotating joint 2, then sleeve the compression spring 8 into the outside of the pin shaft 3, and then sleeve the wear-resistant sleeve 11 into the outside of the pin shaft 3, and then sleeve the fixed joint 5 into the outside of the pin shaft 3, so that the upper end face of the fixed joint 5 is engaged with the lower end face of the rotating joint 2, the compression spring 8 is located in the cavity opened by the rotating joint 2 and the fixed joint 5, and the wear-resistant sleeve 11 is located between the fixed joint 5 and the pin shaft 3, and then place the plane bearing 10 in the groove on the locking sleeve 4, and then align the threaded hole of the locking sleeve 4 with the pin shaft 3, tighten the locking sleeve 4 until the upper end face of the plane bearing 10 contacts the lower end face of the rotating joint 2, and then place the cushion block 7 on the screw 6, and then insert it into the mounting cavity 14 at the bottom of the locking sleeve 4, align the screw 6 with the screw hole at the bottom of the pin shaft 3 and tighten it, then pass the operating rod 9 through the mounting cavity 14, and install nuts on both ends of the operating rod 9, and finally buckle the slot 12 on the side rail of the operating table and fix it by tightening the willow leaf handle.

[0040] When adjusting the angle of the traction frame, rotate the locking sleeve 4 through the operating rod 9 and twist it downward for a distance. Then the compression spring 8 begins to change from a compressed state to an extended state, pushing the movable joint 2 to move upward. The movable joint 2 in turn drives the pin 3, the locking sleeve 4, the plane bearing 10, the cushion block 7, the screw 6 and the operating rod 9 to move upward. After the movable joint 2 is separated from the fixed joint 5, rotate the movable arm to adjust the movable arm to the required angle, then lower the movable joint 2 and re-engage with the fixed joint 5, then tighten the locking sleeve 4, and the adjustment is completed.

[0041] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "front", "back", "lower left", "upper right", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Although the present invention has been described according to a limited number of embodiments, those skilled in the art, with the benefit of the above description, should understand that other embodiments can be conceived within the scope of the present invention described thereby.

Claims

1. The traction frame movable joint is characterized by: include: movable arm; A pin shaft (3), the pin shaft (3) is vertically connected to the movable arm in a fixed structure manner; A fixed arm with a pin hole, the pin hole being sleeved on the outside of the pin (3), and the pin (3) extending downward through the fixed arm; A locking sleeve (4), wherein a threaded hole (13) is provided inside the locking sleeve (4) and is threadedly engaged with the pin shaft (3); a mounting cavity (14) communicating with the outside is provided at the lower part of the locking sleeve (4); and the lower end of the pin shaft (3) extends into the mounting cavity (14); A cushion block (7), the cushion block (7) is arranged on the lower end surface of the pin shaft (3) in a fixed structure manner, and the outer wall of the cushion block (7) protrudes from the peripheral wall of the threaded hole (13); An operating rod (9) is horizontally passed through the mounting cavity (14) and is arranged below the cushion block (7).

2. The traction frame movable joint according to claim 1, characterized in that: The movable arm comprises a frame body (1), a rotating joint (2) is arranged at the rear of the frame body (1) in a fixed structure manner, the rotating joint (2) is provided with a through hole, and the through hole is connected to a pin shaft (3) by an interference fit manner.

3. The traction frame movable joint according to claim 2, characterized in that: The fixed arm comprises a fixed joint (5), and a clamping slot (12) is arranged in a fixed structural manner on a side of the fixed joint (5) away from the frame body (1).

4. The traction frame movable joint according to claim 3, characterized in that: The upper end surface of the fixed joint (5) and the lower end surface of the rotating joint (2) are both provided with saw teeth in a mutually engaging structure.

5. The traction frame movable joint according to claim 4, characterized in that: The upper end surface of the fixed joint (5) and the lower end surface of the rotating joint (2) are both provided with cavities, in which a compression spring (8) is arranged, and the compression spring (8) is sleeved on the outside of the pin shaft (3).

6. The traction frame movable joint according to claim 1, characterized in that: The upper part of the locking sleeve (4) and the lower part of the fixed joint (5) are both provided with grooves, a plane bearing (10) is arranged in the groove, and the plane bearing (10) is sleeved on the outside of the pin shaft (3).

7. The traction frame movable joint according to claim 1, characterized in that: A wear-resistant sleeve (11) is arranged between the pin shaft (3) and the fixed joint (5).

8. The traction frame movable joint according to claim 1, characterized in that: The mounting cavity (14) is communicated with the threaded hole (13); The lower end surface of the pin shaft (3) is provided with a screw (6) for fixing the cushion block (7), and one end of the screw (6) passes through the cushion block (7) and is threadedly engaged with the pin shaft (3).

9. The traction frame movable joint according to claim 1, characterized in that: The operating rod (9) is a stud bolt, and nuts are connected on both sides of the stud bolt through threads.

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