Medical Balancer

Abstract

The present invention discloses a medical balancer, comprising a wheel housing, a mounting shaft, a retractable cable structure, a spring assembly, and a cable. The right end of the wheel housing and the right end of the retractable cable structure are both open, and the left side of the wheel housing is contracted into a truncated cone. The wheel housing is sleeved on the mounting shaft, and the left side of the retractable cable structure is contracted into a truncated cone. The retractable cable structure is arranged on the inner side of the wheel housing and sleeved on the mounting shaft. The cable is wound on the truncated cone of the retractable cable structure, and one end of the cable is fixed to the retractable cable structure, while the other end of the cable passes through the wheel housing and extends to the outside of the wheel housing. The spring assembly is arranged on the inner side of the retractable cable structure and sleeved on the mounting shaft. The right end of the retractable cable structure is bolted to an inner cover plate, and the right end of the wheel housing is bolted to an outer cover plate. A force-enhancing structure is provided on a transmission sleeve on the mounting shaft, and a worm gear meshing with the force-enhancing structure is embedded in the left portion of the wheel housing. The medical balancer of the present invention enables manual and electric adjustment of the coil spring, making it more convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of balancers, in particular to a medical balancer. Background Art

[0002] A spring balancer is a mechanical device used to suspend and transport equipment, utilizing the elastic force of a coiled spring for cushioning. Spring balancers are widely used in suspended medical devices to ensure their stability. Existing balancers have a limited adjustment method for the coiled spring, making them inconvenient to use in medical settings. Therefore, we propose a medical balancer. Summary of the Invention

[0003] The main purpose of the present invention is to provide a medical balancer that can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] The medical balancer includes a wheel shell, a mounting shaft, a retractable cable structure, a spring assembly and a cable. The right end of the wheel shell and the right end of the retractable cable structure are both open, and the left side of the wheel shell is contracted into a truncated cone-shaped surface; the wheel shell is sleeved on the mounting shaft, and the left side of the retractable cable structure is contracted into a truncated cone-shaped surface. The retractable cable structure is arranged on the inner side of the wheel shell and sleeved on the mounting shaft. The cable is wound on the truncated cone-shaped surface of the retractable cable structure, and one end of the cable is fixed to the retractable cable structure. The other end of the cable passes through the wheel shell and extends to The outside of the wheel shell; the spring assembly is arranged on the inner side of the cable-retracting and releasing structure and is sleeved on the installation shaft, and the spring assembly is used in conjunction with the cable-retracting and releasing structure and the installation shaft; the right end of the cable-retracting and releasing structure is installed with an inner cover plate by bolts, and the inner cover plate is movably sleeved on the installation shaft; the right end of the wheel shell is installed with an outer cover plate by bolts, and the outer cover plate is located on the right side of the inner cover plate and is movably sleeved on the installation shaft; a force-adding structure is provided on the transmission sleeve of the installation shaft, and the force-adding structure is embedded in the left end of the wheel shell, and a worm gear meshing with the force-adding structure is embedded in the left part of the wheel shell.

[0006] Preferably, the wheel housing is movably sleeved on the mounting shaft, and a cable guide housing is fixedly provided on the rear side of the conical surface of the wheel housing, the cable guide housing is connected to the wheel housing, and the lower end of the cable guide housing is open, the cable passes through the inner cavity of the cable guide housing and extends to the outside of the wheel housing; a No. 1 groove is provided on the front lower side of the conical surface of the wheel housing, a mounting hole is provided on the upper groove wall of the No. 1 groove, a No. 2 groove is provided in the middle of the left end of the wheel housing, and a No. 3 groove is provided on the front side of the left inner wall of the wheel housing; the No. 3 groove connects the mounting hole and the No. 2 groove, and the mounting hole passes through the upper groove wall of the No. 3 groove; a plurality of anti-detachment strips are fixedly provided on the inner cylindrical surface of the wheel housing, and the plurality of anti-detachment strips are distributed in a ring array with the central axis of the wheel housing as the center, and the anti-detachment strips are arranged along the axial direction of the wheel housing; the force structure is provided in the No. 2 groove, the worm is provided in the mounting hole, and the meshing portion of the worm and the force structure is located in the No. 3 groove.

[0007] Preferably, the cable-retracting structure includes a tower pulley, the right end of the tower pulley is open, the inner cover plate is installed on the right end of the tower pulley by bolts, the left side of the circumferential side of the tower pulley is contracted into a conical surface, a spiral cable-retracting groove is opened on the conical surface, the end of the cable-retracting groove passes through the left end surface of the tower pulley, and a mounting groove is opened at the junction of the cylindrical side surface of the tower pulley and the conical side surface, the starting end of the cable-retracting groove is connected with the mounting groove, the cable is wound around the cable-retracting groove, one end of the cable extends into the mounting groove and is connected to the mounting groove through the shaft; the tower pulley is arranged in the wheel shell and movably sleeved on the mounting shaft, and the spring assembly is located on the inner side of the tower pulley; two transmission grooves arranged relatively spaced apart are opened on the cylindrical inner circumferential side surface of the tower pulley, and a through-opening is opened on the cylindrical inner side surface of the tower pulley, and the through-opening passes through the outer side surface of the tower pulley.

[0008] The outer cover is fixedly provided with a toothed plate and the toothed plate is fixedly mounted on the toothed plate, wherein the toothed plate is fixedly mounted on the toothed plate and the toothed plate is fixedly mounted on the toothed plate.

[0009] Preferably, a torsion spring is sleeved on the connecting column, which connects the anti-slip block and the bracket, and a pressing surface and an ejection surface are respectively provided on the upper and lower sides of one end of the anti-slip block facing the coil spring. When the coil spring is in a wound state, the pressing surface fits the surface of the coil spring under the action of the torsion spring; when the coil spring breaks and unwinds, the unwound coil spring pushes the anti-slip block to rotate around the connecting column and move toward the inner wall of the tower wheel, and the unwound coil spring fits the ejection surface.

[0010] Preferably, the force-adding structure includes a worm gear and a mounting ring which are sleeved on the mounting shaft, a movable groove No. 1 is opened at the left end of the worm gear, a movable groove No. 2 is opened in the middle of the right groove wall of the movable groove No. 1, and a plurality of ratchets are fixedly installed on the cylindrical groove wall of the movable groove No. 1, and the plurality of ratchets are distributed in a circular array with the central axis of the movable groove No. 1 as the center; the mounting ring is movably arranged in the movable groove No. 2, and a sleeve is fixedly connected to the middle of the left end of the mounting ring, and a pawl is movably connected to one side of the left end of the mounting ring through an axis, and the pawl cooperates with the ratchet; an end cover is installed on the left end of the sleeve through a bolt, and the end cover is located in the movable groove No. 1 and on the left side of the ratchet.

[0011] Preferably, the worm wheel is meshed with the worm, the worm wheel is rotationally connected to the mounting shaft, the sleeve and the end cover are both sleeved on the mounting shaft, and the sleeve and the end cover are transmission-connected to the mounting shaft through a keyway.

[0012] Preferably, when viewed from the left, when the worm wheel rotates clockwise, the ratchet pushes the pawl to rotate clockwise, driving the mounting ring, the sleeve and the mounting shaft to rotate clockwise; when the mounting shaft rotates clockwise, it drives the mounting cylinder to rotate clockwise, causing the coil spring to reel.

[0013] Preferably, the medical balancer also includes a pin shaft; a lock hole is opened on one side of the left end of the wheel shell, the lock hole is connected to the inner cavity of the wheel shell, a No. 4 groove is opened on the left end of the tower wheel, and a stop block is fixedly connected in the No. 4 groove; the pin shaft can be inserted into the lock hole and cooperate with the stop block.

[0014] Preferably, a window is provided on one side of the right end of the outer cover plate, an inner gear ring is fixedly connected to the right end of the inner cover plate, a drive motor is installed on the right end of the outer cover plate by bolts, the output end of the drive motor passes through the window and is fixedly connected to a drive gear, and the drive gear is meshed with the inner gear ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The worm can cooperate with the force structure. In the left viewing direction, the installation shaft is rotated clockwise, the installation cylinder rotates, and the winding spring is wound. During the winding process of the winding spring, the transmission groove and the transmission block can be used to drive the cable-winding structure to rotate, so that the cable can be wound on the cable-winding structure. After the cable is wound, the pin shaft cooperates with the stop block, and then the force structure is continued to be rotated to realize the winding of the winding spring and stop the cable from being wound, thereby realizing manual adjustment of the winding spring.

[0017] 2. Through the cooperation of the drive motor, drive gear and inner gear ring, the inner cover plate can be directly driven to rotate, and the tower pulley can be driven to rotate, thereby realizing the electric winding and electric release of the cable; by using or not using the drive motor, the cable can be released electrically or manually, which is more convenient to use.

[0018] 3. There are two cables, which serve as backup for each other and provide higher safety.

[0019] When the cam is in a closed position, the spring forces the cam to move against the wheel hub, which in turn pushes the cam back into position, and the cam is in a closed position, so that the cam is in a closed position and the cam is in a closed position, so that the cam is in a closed position and the cam is in a closed position, so that the cam is in a closed position and the cam is in a closed position, so that the cam is in a closed position and the cam is in a closed position, so that the cam is in a closed position and the cam is in a closed position, so that the cam is in a closed position and the cam is in a closed position, BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the overall structural diagram of the medical balancer of the present invention;

[0021] Figure 2 This is a structural diagram of the medical balancer of the present invention from another perspective;

[0022] Figure 3 Schematic diagram of the internal structure of the medical balancer of the present invention;

[0023] Figure 4 Another schematic diagram of the internal structure of the medical balancer of the present invention

[0024] Figure 5 It is a schematic diagram of the structure of the outer part of the wheel housing;

[0025] Figure 6 Schematic diagram of the internal structure of the wheel housing;

[0026] Figure 7 Schematic diagram of the structure of the retractable cable structure;

[0027] Figure 8 It is a structural schematic diagram of the retractable cable structure from another perspective;

[0028] Figure 9 Schematic diagram of the structure of the spring assembly;

[0029] Figure 10 Schematic diagram of the structure of the spring assembly;

[0030] Figure 11 It is a structural diagram of the afterburner structure;

[0031] Figure 12 FIG. 1 is a partial structural diagram of another embodiment of the medical balancer of the present invention.

[0032] In the figure: 1. wheel housing; 2. outer cover; 21. window; 3. mounting shaft; 4. cable retracting and releasing structure; 5. spring assembly; 6. inner cover; 61. inner gear ring; 7. force adding structure; 8. worm; 9. cable; 11. cable guide housing; 12. groove No. 1; 13. mounting hole; 14. groove No. 2; 15. groove No. 3; 16. lock hole; 17. anti-slip bar; 41. tower pulley; 42. transmission groove; 43. mounting groove; 44. cable retracting and releasing groove; 45. groove No. 4; 46. Stop block; 47, through-hole; 51, mounting tube; 52, casing; 521, connecting groove; 522, bracket; 523, transmission block; 53, coil spring; 54, connecting column; 55, anti-slip block; 551, pressing surface; 552, ejection surface; 56, torsion spring; 71, worm gear; 711, movable groove No. 1; 712, movable groove No. 2; 72, ratchet; 73, mounting ring; 74, pawl; 75, sleeve; 76, end cover; 10, drive motor; 101, drive gear. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0034] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] Example 1

[0037] like Figure 1-9As shown, the medical balancer includes a wheel housing 1, a mounting shaft 3, a retractable cable structure 4, a spring assembly 5 and a cable 9. The right end of the wheel housing 1 and the right end of the retractable cable structure 4 are both open, and the left side of the peripheral side of the wheel housing 1 is contracted into a truncated cone-shaped surface; the wheel housing 1 is sleeved on the mounting shaft 3, and the left side of the peripheral side of the retractable cable structure 4 is contracted into a truncated cone-shaped surface. The retractable cable structure 4 is arranged on the inner side of the wheel housing 1 and sleeved on the mounting shaft 3. The cable 9 is wound on the truncated cone-shaped surface of the retractable cable structure 4, and one end of the cable 9 is fixed to the retractable cable structure 4, and the other end of the cable 9 passes through the wheel housing 1 and extends to The outside of the wheel shell 1; the spring assembly 5 is arranged on the inner side of the cable-retracting and releasing structure 4 and is sleeved on the mounting shaft 3, and the spring assembly 5 is used in conjunction with the cable-retracting and releasing structure 4 and the mounting shaft 3; the right end of the cable-retracting and releasing structure 4 is installed with an inner cover plate 6 by bolts, and the inner cover plate 6 is movably sleeved on the mounting shaft 3; the right end of the wheel shell 1 is installed with an outer cover plate 2 by bolts, and the outer cover plate 2 is located on the right side of the inner cover plate 6 and is movably sleeved on the mounting shaft 3; a transmission sleeve on the mounting shaft 3 is provided with a force-adding structure 7, and the force-adding structure 7 is embedded in the left end of the wheel shell 1, and a worm 8 meshing with the force-adding structure 7 is embedded in the left part of the wheel shell 1.

[0038] It should be noted that the wheel shell 1 is movably sleeved on the mounting shaft 3, and a cable guide housing 11 is fixedly provided on the rear side of the truncated cone surface of the wheel shell 1. The cable guide housing 11 is connected to the wheel shell 1, and the lower end of the cable guide housing 11 is open. The cable 9 passes through the inner cavity of the cable guide housing 11 and extends to the outside of the wheel shell 1; a No. 1 groove 12 is provided on the front lower side of the truncated cone surface of the wheel shell 1, and a mounting hole 13 is provided on the upper groove wall of the No. 1 groove 12. A No. 2 groove 14 is provided in the middle of the left end of the wheel shell 1, and a No. 2 groove 14 is provided on the front side of the left inner wall of the wheel shell 1. A No. 3 groove 15 is opened; the No. 3 groove 15 connects the mounting hole 13 and the No. 2 groove 14, and the mounting hole 13 passes through the upper groove wall of the No. 3 groove 15; a plurality of anti-slip bars 17 are fixedly arranged on the inner cylindrical surface of the wheel shell 1, and the plurality of anti-slip bars 17 are distributed in a ring array with the central axis of the wheel shell 1 as the center, and the anti-slip bars 17 are arranged along the axial direction of the wheel shell 1; the force structure 7 is arranged in the No. 2 groove 14, the worm 8 is arranged in the mounting hole 13, and the meshing portion of the worm 8 and the force structure 7 is located in the No. 3 groove 15.

[0039] It should be noted that there are two cables 9, which serve as backup for each other, thus providing higher safety.

[0040] As a further explanation of the above technical solution, the cable-retracting structure 4 includes a tower pulley 41, the right end of which is open, and the inner cover plate 6 is installed on the right end of the tower pulley 41 by bolts. The left side of the circumferential side of the tower pulley 41 is contracted into a conical surface, and a spiral cable-retracting groove 44 is provided on the conical surface. The end of the cable-retracting groove 44 passes through the left end surface of the tower pulley 41, and a mounting groove 43 is provided at the junction of the cylindrical side surface and the conical side surface of the tower pulley 41. The starting end of the cable-retracting groove 44 is connected to the mounting groove 43, and the cable 9 is wound around the cable-retracting groove 44. One end of the cable 9 extends into the mounting groove 43 and is connected to the mounting groove 43 through an axis; the tower pulley 41 is arranged in the wheel housing 1 and is movably sleeved on the mounting shaft 3, and the spring assembly 5 is located on the inner side of the tower pulley 41; two transmission grooves 42 with relative intervals are provided on the cylindrical inner circumferential side surface of the tower pulley 41. A through-hole 47 is formed on the cylindrical inner side surface of the step pulley 41 , and the through-hole 47 passes through the outer side surface of the step pulley 41 .

[0041] As a further explanation of the above technical solution, the spring assembly 5 includes a mounting tube 51 fixedly sleeved on the mounting shaft 3, a surrounding shell 52 is movably sleeved on the peripheral side of the mounting tube 51, and a coil spring 53 is installed between the surrounding shell 52 and the mounting tube 51. The coil spring 53 is sleeved on the mounting tube 51, and the inner end of the coil spring 53 is inserted into the outer peripheral side of the mounting tube 51, and the outer end of the coil spring 53 is inserted into the inner peripheral side of the mounting tube 51; the surrounding shell 52 is arranged on the inner side of the step pulley 41, and two relatively spaced apart sides are fixedly connected to the peripheral side of the surrounding shell 52 Transmission blocks 523, the two transmission blocks 523 are respectively located in the two transmission grooves 42, and the transmission blocks 523 cooperate with the transmission grooves 42; a connecting groove 521 is provided on the peripheral side of the shell 52, which runs through the inside and outside of the shell 52, and two adjacent brackets 522 are fixedly connected in the connecting groove 521. A connecting column 54 is inserted and connected on the two brackets 522. The connecting column 54 is located on the outside of the shell 52, and an anti-slip block 55 is movably provided on the peripheral side of the connecting column 54. The anti-slip block 55 is located between the two brackets 52 2, the anti-slip block 55 cooperates with the coil spring 53 and the anti-slip bar 17; a torsion spring 56 is sleeved on the connecting column 54, and the torsion spring 56 connects the anti-slip block 55 and the bracket 522. A pressing surface 551 and a protruding surface 552 are respectively provided on the upper and lower sides of the end of the anti-slip block 55 facing the coil spring 53. When the coil spring 53 is in the reeled state, the pressing surface 551 is in contact with the surface of the coil spring 53 under the action of the torsion spring 56; when the coil spring 53 breaks and unwinds, the unwound coil spring 53 pushes the anti-slip block 55 to rotate around the connecting column 54 and The inner wall of the tower pulley 41 moves, and the coil spring 53 in the unwound state fits against the ejection surface 552. At this time, the anti-slip block 55 passes through the through-hole 47, and the anti-slip block 55 cooperates with the anti-slip bar 17, so that after the coil spring 53 breaks, when the moving speed of the cable 9 suddenly increases, the anti-slip block 55 can abut against the anti-slip bar 17, so that the wheel housing 1 and the tower pulley 41 are connected together through the cooperation of the anti-slip bar 17 and the anti-slip block 55, so that the tower pulley 41 cannot rotate relative to the wheel housing 1, thereby preventing the cable 9 from continuing to move downward, thereby having a braking effect.

[0042] As a further explanation of the above technical solution, the force-adding structure 7 includes a worm gear 71 and a mounting ring 73 which are sleeved on the mounting shaft 3. A No. 1 movable groove 711 is provided at the left end of the worm gear 71, and a No. 2 movable groove 712 is provided in the middle of the right groove wall of the No. 1 movable groove 711. A plurality of ratchets 72 are fixedly installed on the cylindrical groove wall of the No. 1 movable groove 711, and the plurality of ratchets 72 are distributed in a circular array with the central axis of the No. 1 movable groove 711 as the center; the mounting ring 73 is movably arranged in the No. 2 movable groove 712, and a sleeve 75 is fixedly connected to the middle of the left end of the mounting ring 73. A pawl 74 is movably connected to one side of the left end of the mounting ring 73 through an axis, and the pawl 74 cooperates with the ratchet 72; in the left viewing direction, when the ratchet 72 rotates clockwise, the pawl 74 can drive the mounting ring 73 and the sleeve 75 to rotate clockwise. An end cap 76 is bolted to the left end of the sleeve 75. This end cap 76 is located within the first movable slot 711 and to the left of the ratchet tooth 72. The worm gear 71 meshes with the worm 8, which is rotationally connected to the mounting shaft 3. The worm 8 drives the worm gear 71 in rotation. Both the sleeve 75 and the end cap 76 are sleeved onto the mounting shaft 3. These two components are connected to the mounting shaft 3 via a keyway, enabling rotation of the sleeve 75 and the mounting shaft 3.

[0043] When viewed from the left, when the worm gear 71 rotates clockwise, the ratchet 72 pushes the pawl 74 to rotate clockwise, driving the mounting ring 73, the sleeve 75 and the mounting shaft 3 to rotate clockwise; when the mounting shaft 3 rotates clockwise, the mounting cylinder 51 is driven to rotate clockwise, causing the winding spring 53 to reel in. During the reeling process of the winding spring 53, the casing 52 is driven to rotate clockwise, and the cooperation of the transmission groove 42 and the transmission block 523 is utilized to drive the cable retracting structure 4 to rotate clockwise, and the cable 9 is reeled in the cable retracting groove 44; after the cable 9 is reeled in, the worm gear 71 continues to rotate clockwise to complete the reeling of the winding spring 53.

[0044] When the cable 9 is lowered by the downward pulling force, in the left viewing direction, the cable retracting structure 4 is pulled to rotate counterclockwise, and the shell 52 is driven to rotate counterclockwise through the cooperation of the transmission groove 42 and the transmission block 523, thereby pulling the coil spring 53, causing the coil spring 53 to deform and generate elastic potential energy. This elastic potential energy makes the coil spring 53 tend to retract, thereby acting in the opposite direction on the downward pulled cable 9, so that the cable 9 receives an upward pulling force during the downward pulling process, thereby buffering the downward pulling movement of the cable 9 and achieving balance. When the coil spring 53 is pulled apart by the cable 9, since the mounting cylinder 51 is fixed to the mounting shaft 3, the mounting shaft 3 is connected to the sleeve 75 by a keyway, and the sleeve 75 is fixed to the mounting ring 73, so that when the mounting cylinder 51 has a tendency to rotate counterclockwise under the action of the pulled coil spring 53, the mounting shaft 3 will have a tendency to rotate counterclockwise, thereby causing the mounting ring 73 to have a tendency to rotate counterclockwise, causing the pawl 74 to act on the ratchet 72, causing the ratchet 72 to have a tendency to rotate counterclockwise, thereby causing the worm gear 71 to have a tendency to rotate counterclockwise. Since the worm gear 71 is meshed with the worm 8, the self-locking between the worm gear 71 and the worm 8 makes the worm gear 71 have a tendency to rotate counterclockwise but cannot rotate counterclockwise, so that when the cable 9 is pulled down, the mounting shaft 3 and the mounting cylinder 51 will not rotate counterclockwise, so that the coil spring 53 can play a role of buffering and balancing when the cable 9 is pulled down.

[0045] It should be further explained that the medical balancer also includes a pin; a lock hole 16 is provided on one side of the left end of the wheel shell 1, and the lock hole 16 is connected to the inner cavity of the wheel shell 1. A No. 4 groove 45 is provided at the left end of the tower wheel 41, and a stop block 46 is fixedly connected to the No. 4 groove 45; the pin can be inserted into the lock hole 16 and cooperate with the stop block 46; after the pin contacts the stop block 46, the retractable cable structure 4 can rotate relative to the wheel shell 1 to achieve the function of limiting and stopping rotation.

[0046] Example 2

[0047] like Figure 10 The illustrated medical balancer has a window 21 extending through one side of the right end of the outer cover plate 2. An inner ring gear 61 is fixedly connected to the right end of the inner cover plate 6. A drive motor 10 is bolted to the right end of the outer cover plate 2. The output end of the drive motor 10 passes through the window 21 and is fixedly connected to a drive gear 101, which meshes with the inner ring gear 61. The remaining structure is the same as that of the first embodiment. In this embodiment, the drive motor 10 can drive the drive gear 101 to rotate, causing the inner ring gear 61 to rotate, thereby rotating the inner cover plate 6 and the cable retractable structure 4, achieving electric retraction and release of the cable 9, making it more convenient to use and improving practicality.

[0048] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A medical balancer comprising a wheel housing (1), a mounting shaft (3), a cable retracting and releasing structure (4), a spring assembly (5) and a cable (9), characterized in that: The right end of the wheel shell (1) and the right end of the retractable cable structure (4) are both open, and the left side of the peripheral side of the wheel shell (1) is contracted into a truncated cone-shaped surface; the wheel shell (1) is sleeved on the installation shaft (3), and the left side of the peripheral side of the retractable cable structure (4) is contracted into a truncated cone-shaped surface, the retractable cable structure (4) is arranged on the inner side of the wheel shell (1) and sleeved on the installation shaft (3), the cable (9) is wound on the truncated cone-shaped surface of the retractable cable structure (4), and one end of the cable (9) is fixed to the retractable cable structure (4), and the other end of the cable (9) passes through the wheel shell (1) and extends to the outside of the wheel shell (1); the spring assembly (5) is arranged on the retractable cable structure ( 4) and is sleeved on the installation shaft (3), the spring assembly (5) is used in conjunction with the cable retracting and releasing structure (4) and the installation shaft (3); the right end of the cable retracting and releasing structure (4) is installed with an inner cover plate (6) by bolts, and the inner cover plate (6) is movably sleeved on the installation shaft (3); the right end of the wheel shell (1) is installed with an outer cover plate (2) by bolts, and the outer cover plate (2) is located on the right side of the inner cover plate (6) and is movably sleeved on the installation shaft (3); the transmission sleeve on the installation shaft (3) is provided with a force-adding structure (7), and the force-adding structure (7) is embedded in the left end of the wheel shell (1), and the left part of the wheel shell (1) is embedded with a worm (8) meshing with the force-adding structure (7); A window (21) is provided on one side of the right end of the outer cover plate (2), an inner gear ring (61) is fixedly connected to the right end of the inner cover plate (6), a drive motor (10) is mounted on the right end of the outer cover plate (2) via bolts, an output end of the drive motor (10) passes through the window (21) and is fixedly connected to a drive gear (101), and the drive gear (101) is meshed with the inner gear ring (61); The wheel housing (1) is movably sleeved on the mounting shaft (3), and a cable guide housing (11) is fixedly arranged on the rear side of the truncated cone surface of the wheel housing (1). The cable guide housing (11) is connected to the wheel housing (1), and the lower end of the cable guide housing (11) is open. The cable (9) passes through the inner cavity of the cable guide housing (11) and extends to the outside of the wheel housing (1); a first groove (12) is provided on the front lower side of the truncated cone surface of the wheel housing (1), and a mounting hole (13) is provided on the upper groove wall of the first groove (12); a second groove (14) is provided in the middle of the left end of the wheel housing (1), and a third groove (15) is provided on the front side of the left inner wall of the wheel housing (1). Groove (15); the No. 3 groove (15) is connected to the mounting hole (13) and the No. 2 groove (14), and the mounting hole (13) passes through the upper groove wall of the No. 3 groove (15); a plurality of anti-slip bars (17) are fixedly arranged on the inner cylindrical surface of the wheel shell (1), and the plurality of anti-slip bars (17) are distributed in a ring array with the central axis of the wheel shell (1) as the center, and the anti-slip bars (17) are arranged along the axial direction of the wheel shell (1); the force structure (7) is arranged in the No. 2 groove (14), the worm (8) is arranged in the mounting hole (13), and the meshing portion of the worm (8) and the force structure (7) is located in the No. 3 groove (15); The cable retracting and releasing structure (4) includes a tower wheel (41), the right end of the tower wheel (41) is open, the inner cover plate (6) is installed on the right end of the tower wheel (41) by bolts, the left side of the peripheral side of the tower wheel (41) is contracted into a truncated cone-shaped surface, a spiral cable retracting and releasing groove (44) is provided on the truncated cone-shaped surface, the end of the cable retracting and releasing groove (44) passes through the left end surface of the tower wheel (41), and an installation groove (43) is provided at the intersection of the cylindrical side surface and the truncated cone-shaped side surface of the tower wheel (41), and the starting end of the cable retracting and releasing groove (44) is communicated with the installation groove (43). The cable (9) is wound around and arranged in a cable retracting and releasing groove (44), one end of the cable (9) extends into the installation groove (43) and is connected to the installation groove (43) through a shaft; the tower wheel (41) is arranged in the wheel shell (1) and is movably sleeved on the installation shaft (3), and the spring assembly (5) is located on the inner side of the tower wheel (41); two transmission grooves (42) arranged relatively spaced apart are opened on the cylindrical inner side surface of the tower wheel (41), and a through hole (47) is opened on the cylindrical inner side surface of the tower wheel (41), and the through hole (47) passes through the outer side surface of the tower wheel (41).

2. The medical balancer according to claim 1, characterized in that: The spring assembly (5) comprises a mounting tube (51) fixedly sleeved on the mounting shaft (3); a casing (52) is movably sleeved on the peripheral side surface of the mounting tube (51); a coil spring (53) is installed between the casing (52) and the mounting tube (51); the coil spring (53) is sleeved on the mounting tube (51), and the inner end of the coil spring (53) is inserted into the outer peripheral side surface of the mounting tube (51); the outer end of the coil spring (53) is inserted into the inner peripheral side surface of the mounting tube (51); the casing (52) is arranged on the inner side of the step pulley (41); two transmission blocks (523) arranged relatively spaced apart are fixedly connected to the peripheral side surface of the casing (52); the two transmission blocks (523) are respectively located at two ends. The invention relates to a transmission groove (42) and the transmission block (523) cooperates with the transmission groove (42); a connecting groove (521) is provided on the peripheral side surface of the enclosure (52) and runs through the inside and outside of the enclosure (52); two adjacent brackets (522) are fixedly connected in the connecting groove (521); a connecting column (54) is inserted and connected on the two brackets (522); the connecting column (54) is located on the outside of the enclosure (52); an anti-slip block (55) is movably sleeved on the peripheral side surface of the connecting column (54); the anti-slip block (55) is located between the two brackets (522); the anti-slip block (55) cooperates with a coil spring (53) and an anti-slip bar (17).

3. The medical balancer according to claim 2, characterized in that: A torsion spring (56) is sleeved on the connecting column (54), and the torsion spring (56) connects the anti-slip block (55) and the bracket (522). A pressing surface (551) and an ejection surface (552) are respectively provided on the upper and lower sides of one end of the anti-slip block (55) facing the coil spring (53). When the coil spring (53) is in a reeled state, the pressing surface (551) fits the surface of the coil spring (53) under the action of the torsion spring (56); when the coil spring (53) breaks and unwinds, the unwound coil spring (53) pushes the anti-slip block (55) to rotate around the connecting column (54) and move toward the inner wall of the step pulley (41), and the unwound coil spring (53) fits the ejection surface (552).

4. The medical balancer according to claim 3, characterized in that: The force-adding structure (7) comprises a worm wheel (71) and a mounting ring (73) sleeved on the mounting shaft (3); a first movable groove (711) is provided at the left end of the worm wheel (71); a second movable groove (712) is provided in the middle of the right groove wall of the first movable groove (711); a plurality of ratchet teeth (72) are fixedly mounted on the cylindrical groove wall of the first movable groove (711); the plurality of ratchet teeth (72) are arranged in a ring array with the central axis of the first movable groove (711) as the center. Distribution; the mounting ring (73) is movably arranged in the second movable groove (712); the middle part of the left end of the mounting ring (73) is fixedly connected to a sleeve (75); one side of the left end of the mounting ring (73) is movably connected to a pawl (74) through a shaft, and the pawl (74) cooperates with the ratchet (72); the left end of the sleeve (75) is installed with an end cover (76) through a bolt, and the end cover (76) is located in the first movable groove (711) and on the left side of the ratchet (72).

5. The medical balancer according to claim 4, characterized in that: The worm wheel (71) is meshed with the worm (8), and the worm wheel (71) is rotationally connected to the mounting shaft (3). The sleeve (75) and the end cover (76) are both sleeved on the mounting shaft (3), and the sleeve (75) and the end cover (76) are transmission-connected to the mounting shaft (3) via a keyway.

6. The medical balancer according to claim 5, characterized in that: When the worm wheel (71) rotates clockwise in the left viewing direction, the ratchet (72) pushes the pawl (74) to rotate clockwise, driving the mounting ring (73), the sleeve (75) and the mounting shaft (3) to rotate clockwise; when the mounting shaft (3) rotates clockwise, the mounting cylinder (51) is driven to rotate clockwise, causing the coil spring (53) to rewind.

7. The medical balancer according to claim 6, characterized in that: The medical balancer also includes a pin shaft. A lock hole (16) is provided on one side of the left end of the wheel housing (1). The lock hole (16) is communicated with the inner cavity of the wheel housing (1). A fourth groove (45) is provided on the left end of the step wheel (41). A stop block (46) is fixedly connected in the fourth groove (45). The pin shaft can be inserted into the lock hole (16) and cooperate with the stop block (46).

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