Arm lifting device

Abstract

The invention provides an arm lifting device. The arm lifting device comprises a driving mechanism, a single-face synchronous belt and a winding mechanism. The number of the driving mechanisms is two. The driving mechanism comprises a base, a first gear and a jacking assembly. The base is detachably mounted on an operating table; the first gear is rotatably mounted on the base; the jacking assembly is installed on the base in a sliding mode, and rotation of the first gear can drive the jacking assembly to slide. The single-face synchronous belt is meshed with the two first gears. Winding mechanisms are mounted at the two ends of the single-face synchronous belt correspondingly, the two winding mechanisms are mounted on the two bases correspondingly, and the winding mechanisms can drive the first gears to rotate synchronously; the jacking assemblies correspond to the ends of the single-face synchronous belt in a one-to-one mode and are arranged in parallel. The jacking assembly is located between the two first gears, and the jacking assembly and the end of the single-face synchronous belt are located on the two opposite sides of the first gears in the radial direction correspondingly. In this way, the hip of the patient can be lifted, and then the burden of medical workers can be relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of gynecological surgery, and in particular to an arm lifting device. Background Art

[0002] At present, gynecological diseases are common diseases among women, and female patients need to undergo gynecological surgery to treat gynecological diseases. Female patients undergo gynecological surgery on the operating table, but in the actual operation, female patients often dodge their bodies and curl up their stomachs due to their own physiological reactions. Although the patient's hands and feet are restricted, this phenomenon still exists at the same time, which is not conducive to medical workers to perform surgery.

[0003] At present, the operating tables are all lying flat, which is not conducive to medical workers observing the perineum of the patient, because the distance between the buttocks and the operating table is too close, which will affect the accuracy of the operation. At the same time, the patient lying on the bed is not conducive to medical workers inserting inspection equipment, such as a endoscope, which affects the operation process of medical workers. In addition, the patient's buttocks need to be lifted during the operation to facilitate the operation, but the patient's buttocks are difficult to control by themselves due to anesthesia. At the same time, it is also difficult for medical workers to lift the patient's buttocks. In addition, manual lifting not only increases the burden on medical workers, but also the lifting force is difficult to control all the time, which will cause damage to other parts of the patient. Summary of the invention

[0004] In view of the above problems existing in the prior art, the technical problem to be solved by the present invention is: manually lifting the patient's buttocks not only increases the burden on medical workers, but the lifting force is difficult to control all the time, which may cause damage to other parts of the patient.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: an arm lifting device, comprising:

[0006] The driving mechanism is provided with two driving mechanisms; the driving mechanism comprises: a base, a first gear and a lifting assembly; the base is detachably mounted on the operating table; the first gear is rotatably mounted on the base; the lifting assembly is slidably mounted on the base, and the rotation of the first gear can drive the lifting assembly to slide;

[0007] a single-sided synchronous belt, the single-sided synchronous belt meshing with the two first gears; and

[0008] A winding mechanism, wherein the two ends of the single-sided synchronous belt are respectively equipped with winding mechanisms, the two winding mechanisms are respectively installed on the two bases, and the winding mechanisms can drive the first gear to rotate synchronously;

[0009] Among them, the lifting assembly corresponds to the end of the single-sided synchronous belt one by one and is arranged parallel to each other; the lifting assembly is located between the two first gears, and the lifting assembly and the end of the single-sided synchronous belt are respectively located on opposite sides of the first gear in the radial direction.

[0010] Preferably, the lifting assembly includes: a sliding member, a second gear, a double-sided synchronous belt and a limiting unit; the sliding member is slidably installed on the base along its length direction; two second gears are rotatably installed on the sliding member in the length direction, and the two second gears are located on the side of the sliding member close to the first gear, and the axes of the second gear and the first gear are arranged parallel to each other; the double-sided synchronous belt is arranged in a ring shape, the double-sided synchronous belt is sleeved on the two second gears, and the inner ring of the double-sided synchronous belt is meshed with the two second gears, and the outer ring of the double-sided synchronous belt segment is meshed with the first gear; the limiting unit can limit the rotation of one of the second gears, or limit the sliding of the sliding member.

[0011] Preferably, the limiting unit comprises: a double-rod hydraulic cylinder, a connector and a limiting block; the cylinder body of the double-rod hydraulic cylinder is fixedly mounted on the sliding member, and a connector is fixedly mounted on one end of the piston rod of the double-rod hydraulic cylinder, and the end of the connector away from the double-rod hydraulic cylinder is plugged into and matched with the tooth groove of the second gear; a plurality of triangular limiting grooves are provided on the base, and the plurality of triangular limiting grooves are arranged at intervals along the sliding direction of the sliding member; the limiting block is slidably mounted on the sliding member, and the sliding direction of the limiting block is arranged perpendicular to the piston rod of the double-rod hydraulic cylinder, and one end of the limiting block is plugged into and matched with the triangular limiting groove; the other end of the limiting block and the end of the piston rod of the double-rod hydraulic cylinder away from the connector are provided with inclined surfaces which are parallel to each other and slidably abut against each other.

[0012] Preferably, it further comprises an abutment plate, which is fixedly mounted on the sliding member and is in sliding abutment with a side of the inner ring of the double-sided synchronous belt close to the first gear.

[0013] Preferably, it also includes a lifting plate, which is vertically installed on one end of the lifting assembly close to the single-sided synchronous belt.

[0014] Preferably, a rotating roller is rotatably mounted on one end of the lifting plate away from the other lifting plate.

[0015] Preferably, the winding mechanism includes: a winding roller and a power piece; the winding roller is rotatably mounted on the base, and the winding roller is located below the first gear, the axes of the winding roller and the first gear are arranged parallel to each other, and the winding roller can drive the first gear to rotate synchronously; the end of the single-sided synchronous belt is fixedly mounted on the winding roller; the power piece can drive the winding roller to rotate.

[0016] Preferably, the winding roller drives the first gear to rotate synchronously through a transmission mechanism; the transmission mechanism includes: a sprocket and a chain; sprockets are coaxially fixedly mounted on the first gear and the winding roller, and the two sprockets are connected and driven by a chain.

[0017] Preferably, it also includes a tensioning roller; the two tensioning rollers are rotatably mounted on the base, and the two tensioning rollers are respectively located on the upper and lower sides of the first gear, and the two tensioning rollers are abutted against the plane of the single-sided synchronous belt to abut the tooth surface of the single-sided synchronous belt against the first gear.

[0018] Preferably, the base is detachably mounted on the operating table by a clamping mechanism, and the clamping mechanism includes: a fixed splint, a movable splint and a threaded rod; one end of the fixed splint is fixedly mounted on the base; the movable splint is slidably mounted on the base; the movable splint is arranged parallel to the fixed splint, and one end of the threaded rod passes through the movable splint and is threadedly connected to the movable splint; one end of the threaded rod is rotatably connected to the fixed splint.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] 1. In the present invention, two bases are installed on opposite sides of the operating table in the width direction, so that the single-sided synchronous belt is laid flat on the operating table in the width direction of the operating table; when the patient's buttocks needs to be lifted, the winding mechanism is controlled to move, and the winding mechanism winds up the single-sided synchronous belt, and the winding mechanism drives the end of the single-sided synchronous belt to move downward, and the single-sided synchronous belt drives the first gear meshing with it to rotate, and the first gear drives the lifting assembly to move upward, so as to lift the single-sided synchronous belt upward, and after the middle part of the single-sided synchronous belt is straightened by the winding mechanism, the action of lifting the patient's buttocks can be achieved, thereby reducing the burden on medical staff.

[0021] 2. In the present invention, when there is no need to lift the patient's buttocks, the reeling mechanism is controlled to move in the reverse direction, so that the single-sided synchronous belt stops reeling, and under the heavy pressure of the patient's buttocks, the middle part of the single-sided synchronous belt abuts against the operating table again, and the single-sided synchronous belt drives the first gear to rotate in the reverse direction, so that the lifting mechanism can be driven to move downward through the first gear, thereby reducing interference with the patient during gynecological surgery.

[0022] 3. In the present invention, the height position of the lifting assembly can be adjusted, so that the lifting assembly can be adjusted to a corresponding height according to the patient's own needs, thereby adjusting the patient's hip height, and then when performing gynecological surgery on the patient, the patient's hip height can be finely adjusted, so as to make it more convenient for medical staff to perform gynecological surgery on the patient.

[0023] 4. In the present invention, after the height adjustment of the lifting assembly is completed, the limit unit is controlled to move, the limit unit limits the sliding of the sliding part, and the limit unit stops limiting the rotation of the second gear; for this reason, when the first gear rotates, it can drive the double-sided synchronous belt to rotate synchronously around the two second gears, so that when the single-sided synchronous belt is continued to be wound up by the winding mechanism and the lifting assembly is restricted from sliding, it is not affected by the lifting assembly and the middle part of the single-sided synchronous belt can still be straightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0025] Figure 1 This is a front view of an arm lifting device provided in an embodiment of the present invention.

[0026] Figure 2 A three-dimensional diagram of a driving mechanism provided in an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the structure of a limiting unit provided in an embodiment of the present invention.

[0028] Figure markings: 1-driving mechanism, 11-base, 12-first gear, 13-tensioning roller, 2-lifting assembly, 21-sliding member, 22-second gear, 23-double-sided synchronous belt, 24-abutment plate, 25-lifting plate, 26-rotating roller, 3-single-sided synchronous belt, 4-winding roller, 5-limiting unit, 51-double-rod hydraulic cylinder, 52-connector, 53-limiting block, 54-triangular limiting groove, 6-transmission mechanism, 61-sprocket, 62-chain, 7-clamping mechanism, 71-fixed splint, 72-movable splint, 73-threaded rod, 8-operating bed. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0030] In the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] See also Figure 1-Figure 3 , the embodiment provided by the present invention: an arm lifting device, comprising: a driving mechanism 1, a single-sided synchronous belt 3 and a winding mechanism; the driving mechanism 1 is provided with two; the driving mechanism 1 comprises: a base 11, a first gear 12 and a lifting component 2; the base 11 is detachably mounted on the operating bed 8; the first gear 12 is rotatably mounted on the base 11; the lifting component 2 is slidably mounted on the base 11, and the rotation of the first gear 12 can drive the lifting component 2 to slide; specifically, the lifting component 2 can be a rack; the single-sided synchronous belt 3 is meshed with the two first gears 12; the two ends of the single-sided synchronous belt 3 are respectively installed with winding mechanisms, the two winding mechanisms are respectively installed on the two bases 11, and the winding mechanisms can drive the first gear 12 to rotate synchronously; wherein, the lifting component 2 and the single-sided synchronous belt The ends of the single-sided synchronous belt 3 correspond to each other and are arranged in parallel with each other; the lifting component 2 is located between the two first gears 12, and the ends of the lifting component 2 and the single-sided synchronous belt 3 are respectively located on the opposite sides of the first gear 12 in the radial direction; further, it also includes a tensioning roller 13; the two tensioning rollers 13 are rotatably mounted on the base 11, and the two tensioning rollers 13 are respectively located on the upper and lower sides of the first gear 12, and the two tensioning rollers 13 are abutted against the plane of the single-sided synchronous belt 3 to abut the tooth surface of the single-sided synchronous belt 3 on the first gear 12; through the setting of the two tensioning rollers 13, the single-sided synchronous belt 3 can be tensioned, so as to effectively ensure that the tooth surface of the single-sided synchronous belt 3 can always be meshed with the first gear 12, so as to prevent the single-sided synchronous belt 3 from falling off from the first gear 12 when it is not straightened.

[0033] During specific implementation, the two bases 11 are installed on opposite sides of the operating bed 8 in the width direction, so that the single-sided synchronous belt 3 is laid flat on the operating bed 8 in the width direction of the operating bed 8; when the patient's buttocks needs to be lifted, the winding mechanism is controlled to move, and the winding mechanism winds up the single-sided synchronous belt 3. The winding mechanism drives the end of the single-sided synchronous belt 3 to move downward, and the single-sided synchronous belt 3 drives the first gear 12 meshing with it to rotate, and the first gear 12 drives the lifting assembly 2 to move upward, so as to lift the single-sided synchronous belt 3 upward. After the middle part of the single-sided synchronous belt 3 is straightened by the winding mechanism, the action of lifting the patient's buttocks can be achieved, thereby reducing the burden on medical staff.

[0034] When there is no need to lift the patient's buttocks, the winding mechanism is controlled to move in the reverse direction, so that the single-sided synchronous belt 3 stops winding, and under the heavy pressure of the patient's buttocks, the middle part of the single-sided synchronous belt 3 abuts against the operating bed 8 again, and the single-sided synchronous belt 3 drives the first gear 12 to rotate in the reverse direction, so that the lifting mechanism can be driven downward by the first gear 12, thereby reducing interference with the patient during gynecological surgery.

[0035] See also Figure 1-Figure 3 In other embodiments, the lifting assembly 2 includes: a sliding member 21, a second gear 22, a double-sided synchronous belt 23 and a limit unit 5; the sliding member 21 is slidably installed on the base 11 along its length direction; two second gears 22 are rotatably installed on the sliding member 21 in the length direction, and the two second gears 22 are located on the side of the sliding member 21 close to the first gear 12, and the axes of the second gear 22 and the first gear 12 are arranged parallel to each other; the double-sided synchronous belt 23 is arranged in a ring shape, and the double-sided synchronous belt 23 is sleeved on the two second gears 22, and the inner ring of the double-sided synchronous belt 23 It is meshed with the two second gears 22, and the outer ring of the double-sided synchronous belt 23 is meshed with the first gear 12; the limiting unit 5 can limit the rotation of one of the second gears 22, or limit the sliding of the sliding member 21; further, it also includes an abutment plate 24, the abutment plate 24 is fixedly mounted on the sliding member 21, and the abutment plate 24 is slidably abutted with the side of the inner ring of the double-sided synchronous belt 23 close to the first gear 12; in this way, the double-sided synchronous belt 23 can be effectively prevented from being deformed when meshing with the first gear 12, so that the double-sided synchronous belt 23 can always fit better with the first gear 12.

[0036] Specifically, when the lifting component 2 needs to slide, the limiting unit 5 is controlled to act, so that the limiting unit 5 limits the sliding of the limiting sliding member 21 and limits the rotation of the second gear 22, so that the outer ring of the double-sided synchronous belt 23 forms a structure similar to a rack; for this reason, when the single-sided synchronous belt 3 is in action, the single-sided synchronous belt 3 drives the first gear 12 to rotate, and the first gear 12 drives the double-sided synchronous belt 23 to move up and down, thereby driving the sliding member 21 to move up and down, and the single-sided synchronous belt 3 is lifted upward by the sliding member 21, so that the height position of the lifting component 2 can be adjusted, so that the lifting component 2 can be adjusted to the corresponding height according to the patient's own needs, so as to adjust the patient's hip height, and then when the patient is subjected to gynecological surgery, the patient's hip height can be finely adjusted, so as to make it more convenient for medical staff to perform gynecological surgery on the patient;

[0037] After the height adjustment of the lifting component 2 is completed, the limit unit 5 is controlled to act, the limit unit 5 limits the sliding of the sliding member 21, and the limit unit 5 stops limiting the rotation of the second gear 22; for this reason, when the first gear 12 rotates, the double-sided synchronous belt 23 can be driven to rotate synchronously around the two second gears 22, so that when the single-sided synchronous belt 3 is continued to be wound by the winding mechanism and the lifting component 2 is restricted from sliding, it is not affected by the lifting component 2 and the middle part of the single-sided synchronous belt 3 can still be straightened.

[0038] See also Figure 1-Figure 3 In other embodiments, the limit unit 5 includes: a double-rod hydraulic cylinder 51, a connector 52 and a limit block 53; the cylinder body of the double-rod hydraulic cylinder 51 is fixedly installed on the sliding member 21, and a connector 52 is fixedly installed on one end of the piston rod of the double-rod hydraulic cylinder 51, and the end of the connector 52 away from the double-rod hydraulic cylinder 51 is plugged into the tooth groove of the second gear 22; a plurality of triangular limit grooves 54 are provided on the base 11, and the plurality of triangular limit grooves 54 are arranged at intervals along the sliding direction of the sliding member 21; the limit block 53 is slidably installed on the sliding member 21, and the sliding direction of the limit block 53 is perpendicular to the piston rod of the double-rod hydraulic cylinder 51, and one end of the limit block 53 is plugged into the triangular limit groove 54; the other end of the limit block 53 and the end of the piston rod of the double-rod hydraulic cylinder 51 away from the connector are provided with inclined surfaces parallel to each other and slidingly abutting each other.

[0039] During specific implementation, the double-rod hydraulic cylinder 51 is controlled to move. When the piston rod of the double-rod hydraulic cylinder 51 is controlled to move toward the second gear 22, the piston rod pushes the connector 52 to move toward the second gear 22, so that the connector 52 is inserted into the tooth groove of the second gear 22, thereby limiting the rotation of one of the second gears 22; and the inclined surface on the piston rod is separated from the inclined surface on the limit block 53, so that when the sliding member 21 slides, it drives the limit block 53 to move, and under the action of the inclined surface in the triangular limit groove 54, the limit block 53 slides out of the triangular limit groove 54, so that the limit block 53 stops limiting the sliding of the sliding member 21.

[0040] When the piston rod of the double-rod hydraulic cylinder 51 is controlled to move in a direction away from the second gear 22, the inclined surface on the piston rod abuts against the inclined surface on the limit block 53. Under the action of the two inclined surfaces, the limit block 53 is pushed to slide toward the nearest triangular limit groove 54, thereby limiting the sliding of the sliding member 21; and the piston rod drives the connector 52 to separate from the tooth groove on the second gear 22, thereby achieving the stop limit of the rotation of the second gear 22.

[0041] See also Figure 1-Figure 3 In other embodiments, it also includes a lifting plate 25, which is vertically installed at one end of the lifting component 2 close to the single-sided synchronous belt 3; through the setting of the lifting plate 25, the contact area between the lifting component 2 and the single-sided synchronous belt 3 can be increased, so that the single-sided synchronous belt 3 can slide more smoothly on the lifting plate 25; further, the lifting plate 25 is rotatably installed with a rotating roller 26 at one end away from the other lifting plate 25; through the setting of the rotating roller 26, the single-sided synchronous belt 3 can transition through the rotating roller 26 at the bent position, thereby reducing damage to the single-sided synchronous belt 3, thereby increasing the service life of the single-sided synchronous belt 3, and allowing the rotating roller 26 to rotate following the movement of the single-sided synchronous belt 3.

[0042] See also Figure 1-Figure 3 In other embodiments, the winding mechanism includes: a winding roller 4 and a power member; the winding roller 4 is rotatably mounted on the base 11, and the winding roller 4 is located below the first gear 12, the axes of the winding roller 4 and the first gear 12 are arranged parallel to each other, and the winding roller 4 can drive the first gear 12 to rotate synchronously; the end of the single-sided synchronous belt 3 is fixedly mounted on the winding roller 4; the power member can drive the winding roller 4 to rotate. In specific implementation, the power member can be a motor; the power member is controlled to drive the winding roller 4 to rotate, and the winding roller 4 drives the single-sided synchronous belt 3 to be wound around the winding roller 4, so as to complete the winding of the single-sided synchronous belt 3.

[0043] See also Figure 1-Figure 3In other embodiments, the winding roller 4 drives the first gear 12 to rotate synchronously through the transmission mechanism 6; the transmission mechanism 6 includes: a sprocket 61 and a chain 62; the first gear 12 and the winding roller 4 are coaxially fixed with a sprocket 61, and the two sprockets 61 are connected and driven by the chain 62. In specific implementation, the power member is actuated, the power member drives the winding roller 4 to rotate, the winding roller 4 drives the sprocket 61 to rotate, the sprocket 61 drives another sprocket 61 to rotate through the chain 62, so that the first gear 12 can be driven to rotate, thereby realizing the synchronous rotation of the first gear 12 and the winding roller 4.

[0044] See also Figure 1-Figure 3 In another embodiment, the base 11 is detachably mounted on the operating bed 8 through the clamping mechanism 7, and the clamping mechanism 7 includes: a fixed splint 71, a movable splint 72 and a threaded rod 73; one end of the fixed splint 71 is fixedly mounted on the base 11; the movable splint 72 is slidably mounted on the base 11; the movable splint 72 is arranged parallel to the fixed splint 71, and one end of the threaded rod 73 passes through the movable splint 72 and is threadedly connected to the movable splint 72; one end of the threaded rod 73 is rotatably connected to the fixed splint 71; in specific implementation, the fixed splint 71 and the movable splint 72 are clamped on the upper and lower sides of the operating bed 8, and then the threaded rod 73 is rotated, and the threaded rod 73 drives the movable splint 72 to rotate, so as to reduce the distance between the movable splint 72 and the fixed splint 71, so that the base 11 can be clamped and fixed on the operating bed 8.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An arm lifting device, characterized in that: include: The driving mechanism is provided with two driving mechanisms; the driving mechanism comprises: a base, a first gear and a lifting assembly; the base is detachably mounted on the operating table; the first gear is rotatably mounted on the base; the lifting assembly is slidably mounted on the base, and the rotation of the first gear can drive the lifting assembly to slide; a single-sided synchronous belt, the single-sided synchronous belt meshing with the two first gears; and A winding mechanism, wherein the two ends of the single-sided synchronous belt are respectively equipped with winding mechanisms, the two winding mechanisms are respectively installed on the two bases, and the winding mechanisms can drive the first gear to rotate synchronously; Among them, the lifting assembly corresponds to the end of the single-sided synchronous belt one by one and is arranged parallel to each other; the lifting assembly is located between the two first gears, and the lifting assembly and the end of the single-sided synchronous belt are respectively located on opposite sides of the first gear in the radial direction.

2. An arm lifting device according to claim 1, characterized in that: The lifting assembly includes: a sliding member, a second gear, a double-sided synchronous belt and a limiting unit; the sliding member is slidably installed on the base along its length direction; two second gears are rotatably installed on the sliding member in the length direction, the two second gears are located on the side of the sliding member close to the first gear, and the axes of the second gear and the first gear are arranged parallel to each other; the double-sided synchronous belt is arranged in a ring shape, the double-sided synchronous belt is sleeved on the two second gears, and the inner ring of the double-sided synchronous belt is meshed with the two second gears, and the outer ring of the double-sided synchronous belt segment is meshed with the first gear; the limiting unit can limit the rotation of one of the second gears, or limit the sliding of the sliding member.

3. An arm lifting device according to claim 2, characterized in that: The limiting unit comprises: a double-rod hydraulic cylinder, a connector and a limiting block; the cylinder body of the double-rod hydraulic cylinder is fixedly mounted on the sliding member, a connector is fixedly mounted on one end of the piston rod of the double-rod hydraulic cylinder, and the end of the connector away from the double-rod hydraulic cylinder is plugged into and matched with the tooth groove of the second gear; a plurality of triangular limiting grooves are provided on the base, and the plurality of triangular limiting grooves are arranged at intervals along the sliding direction of the sliding member; the limiting block is slidably mounted on the sliding member, and the sliding direction of the limiting block is arranged perpendicular to the piston rod of the double-rod hydraulic cylinder, and one end of the limiting block is plugged into and matched with the triangular limiting groove; the other end of the limiting block and the end of the piston rod of the double-rod hydraulic cylinder away from the connector are provided with inclined surfaces which are parallel to each other and slidably abut against each other.

4. The arm lifting device according to claim 2, characterized in that: It also includes an abutment plate, which is fixedly mounted on the sliding member and is in sliding abutment with a side of the inner ring of the double-sided synchronous belt close to the first gear.

5. The arm lifting device according to claim 1, characterized in that: It also includes a lifting plate, which is vertically installed on one end of the lifting assembly close to the single-sided synchronous belt.

6. An arm lifting device according to claim 5, characterized in that: A rotating roller is rotatably mounted on one end of the jacking plate away from the other jacking plate.

7. The arm lifting device according to claim 1, characterized in that: The winding mechanism includes: a winding roller and a power piece; the winding roller is rotatably installed on the base, and the winding roller is located below the first gear, the axes of the winding roller and the first gear are arranged parallel to each other, and the winding roller can drive the first gear to rotate synchronously; the end of the single-sided synchronous belt is fixedly installed on the winding roller; the power piece can drive the winding roller to rotate.

8. An arm lifting device according to claim 7, characterized in that: The winding roller drives the first gear to rotate synchronously through a transmission mechanism; the transmission mechanism includes a sprocket and a chain; sprockets are coaxially fixedly mounted on the first gear and the winding roller, and the two sprockets are connected and driven by a chain.

9. The arm lifting device according to claim 1, characterized in that: It also includes a tensioning roller; the two tensioning rollers are rotatably mounted on the base, and the two tensioning rollers are respectively located on the upper and lower sides of the first gear, and the two tensioning rollers are in contact with the plane of the single-sided synchronous belt to make the tooth surface of the single-sided synchronous belt in contact with the first gear.

10. The arm lifting device according to claim 1, characterized in that: The base is detachably mounted on the operating table by a clamping mechanism, and the clamping mechanism includes: a fixed splint, a movable splint and a threaded rod; one end of the fixed splint is fixedly mounted on the base; the movable splint is slidably mounted on the base; the movable splint is arranged parallel to the fixed splint, and one end of the threaded rod passes through the movable splint and is threadedly connected to the movable splint; one end of the threaded rod is rotatably connected to the fixed splint.

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