Mechanical hoisting device

Abstract

According to the technical scheme, the mechanical hoisting device comprises a mounting arm and a plurality of movable knuckle arms, the movable knuckle arms are inserted into the mounting arm and are in sliding connection with the inner wall of the mounting arm, the movable knuckle arms have the moving freedom degree in the length direction of the mounting arm, and the movable knuckle arms are arranged on the mounting arm. The movable knuckle arms are sequentially inserted, each movable knuckle arm comprises a first limiting piece and a second limiting piece, and the first limiting pieces are arranged on the outer walls of the movable knuckle arms; the second limiting pieces are arranged on the inner walls of the movable knuckle arms, and the first limiting pieces on the multiple movable knuckle arms which are sequentially inserted are connected with the adjacent second limiting pieces in a matched mode so as to limit deflection of the multiple movable knuckle arms in the stretching and retracting process. The technical problem that a heavy object cannot be hung when the telescopic arm of the mechanical hoisting device stretches out is solved, and the technical effect that the heavy object can be hung when the telescopic arm of the mechanical hoisting device stretches out is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of semiconductor equipment assembly, and in particular to a mechanical lifting device. Background Art

[0002] During the assembly process of semiconductor equipment, since the equipment is generally large in size and weight, it is difficult to transport it solely by manpower, so a lifting device is required to transport the parts to the designated location.

[0003] In the prior art, in order to ensure the cleanliness of the clean room for semiconductor assembly and avoid contamination, most manufacturers use mechanical lifting devices for lifting. However, the existing mechanical lifting devices are unable to suspend heavy objects during the lifting process because the telescopic arm may deflect or overturn when it is extended. Since it is impossible to balance and stabilize the influence of the suspended weight on the telescopic arm during the extension process, the safety and lifting accuracy of the existing mechanical lifting devices when the telescopic arm is extended cannot be guaranteed. Therefore, the lifting mechanism of the existing mechanical lifting device can only be used for lifting after the telescopic arm is extended and retracted, which affects the processing efficiency.

[0004] Therefore, the problem of the prior art is that the telescopic arm of the mechanical lifting device cannot suspend heavy objects when it is extended. Summary of the invention

[0005] The present application provides a mechanical lifting device, which solves the technical problem that the telescopic arm of the mechanical lifting device cannot hang heavy objects when extended, and achieves the technical effect that the telescopic arm of the mechanical lifting device can hang heavy objects when extended.

[0006] A mechanical lifting device provided in the present application adopts the following technical scheme, including: an installation arm and a movable joint arm, the movable joint arm is inserted in the installation arm and is slidingly connected to the inner wall of the installation arm, the movable joint arm has the freedom of movement along the length direction of the installation arm, the movable joint arm has multiple movable joint arms, and the multiple movable joint arms are inserted in sequence, and the movable joint arm includes: a first limit member and a second limit member, the first limit member is arranged on the inner wall of the movable joint arm; the second limit member is arranged on the outer wall of the movable joint arm, the first limit members on the multiple movable joint arms inserted in sequence are cooperated and connected with the adjacent second limit members to limit the deflection of the multiple movable joint arms during the extension and retraction process.

[0007] Preferably, the first limiting member includes an accommodating cavity; the second limiting member includes at least one protrusion, and the protrusion can be snap-fitted with the accommodating cavity.

[0008] Preferably, the first limiting member and the second limiting member are both installed at the upper end of the movable joint arm.

[0009] Preferably, the first limiting member is block-shaped, and a plurality of first limiting members are arranged in an array along the length direction of the movable joint arm; the second limiting member is strip-shaped, and the length of the second limiting member is greater than the length of the first limiting member matched and connected thereto.

[0010] Preferably, the movable joint arm also includes: a mounting portion, a synchronous gear and a synchronous rack, the mounting portion passes through at least one side wall of the movable joint arm, and the plurality of synchronous racks are respectively mounted on the inner and outer walls of the movable joint arm; the synchronous gear is mounted on the mounting portion, and the synchronous gear has the freedom of rotation around its axis, and the synchronous gear can be respectively meshed and connected with the synchronous racks correspondingly arranged on adjacent movable joint arms.

[0011] Preferably, a fixed rack is provided on the inner wall of the mounting arm, and the fixed rack is meshedly connected with a synchronous gear located on the inner side of the mounting arm.

[0012] Preferably, the synchronous gears on the plurality of movable joint arms are arranged at intervals in the vertical direction.

[0013] Preferably, the movable joint arm includes a lifting arm, the lifting arm is located at the innermost side of the plurality of movable joint arms inserted in sequence, and the lifting arm includes a lifting portion.

[0014] Preferably, the mechanical lifting device also includes a mechanical drive assembly, which includes: a crank handle, a reduction gearbox and a transmission screw, the reduction gearbox is installed on the mounting arm, and the input end of the reduction gearbox is connected to the output end of the crank handle; a transmission screw, which is arranged in the mounting arm, the input end of the transmission screw is connected to the output end of the reduction gearbox, and the output end of the transmission screw is connected to the movable joint arm.

[0015] Preferably, the mounting arm includes at least one visible portion, and the visible portion is made of a transparent material.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. The present application provides a mechanical lifting device, in which a first limit member and a second limit member that can cooperate with each other are arranged in a movable joint arm. The first limit member and the second limit member slide and cooperate with each other during the extension of the movable joint arm, thereby avoiding possible deflection of each joint arm during the synchronous extension process, so that the telescopic arm can hang heavy objects even during the extension and retraction process, thereby improving the working efficiency and lifting accuracy of the mechanical lifting device.

[0018] 2. The present application provides a mechanical lifting device, which enables multiple movable arms to be extended synchronously by setting a synchronous transmission component, thereby improving the telescopic efficiency of the movable arms and avoiding the impact of thinner arm sections when a single section is extended, so that the telescopic arm can hang heavy objects even during the extension and retraction process, thereby improving the working efficiency and lifting accuracy of the mechanical lifting device.

[0019] 3. The present application provides a mechanical lifting device, in which the second limit piece is block-shaped, and multiple second limit pieces on the same movable joint arm are arranged in an array along the length direction of the movable joint arm. Since the movable joint arm will produce bending deformation under the influence of the gravity of the suspended object, a gap will exist in the second limit piece on the upper surface of the movable joint arm when it is deformed, thereby avoiding possible damage to the second limit piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a left side view of the mechanical lifting device in the embodiment of the utility model;

[0021] Figure 2 It is a front view of the mechanical lifting device in the embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the mechanical lifting device in the embodiment of the utility model:

[0023] Figure 4 It is a structural schematic diagram of the mechanical lifting device from another perspective in the embodiment of the utility model;

[0024] Figure 5 It is a partial structural schematic diagram of the movable joint arm in the embodiment of the utility model;

[0025] Figure 6 It is a schematic structural diagram of the movable joint arm in the embodiment of the utility model.

[0026] Explanation of the reference numerals: 100, mounting arm; 110, visible portion; 200, movable joint arm; 210, first position limiting member; 211, accommodating chamber; 220, second position limiting member; 221, protrusion; 230, mounting portion; 240, gear; 250, rack; 260, lifting arm; 261, lifting portion; 300, mechanical drive assembly; 310, crank handle; 320, reduction gear box; 330, transmission screw. DETAILED DESCRIPTION

[0027] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of this application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0028] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] The lifting of heavy objects generally uses hydraulic transmission to drive the telescopic components for extension and retraction, such as hydraulic rope telescopic components and hydraulic pin telescopic components. However, the above two telescopic components are complex in form, cumbersome in transmission, difficult to debug and maintain, and there is a risk of oil leakage over time, which pollutes the equipment. Therefore, they are not suitable for use in the assembly process of semiconductor components. In order to ensure the cleanliness of the clean room for semiconductor assembly and avoid pollution, some manufacturers use mechanical lifting devices for lifting. However, the existing mechanical lifting devices cannot suspend heavy objects during the lifting process because they cannot balance and stabilize the influence of the hanging weight on the telescopic arm during the extension process, which may cause the telescopic arm to deflect or overturn when it is extended. Its safety and lifting accuracy cannot be guaranteed. Therefore, the existing mechanical lifting device lifting mechanism can only be used for lifting after the telescopic arm is extended and retracted.

[0030] In order to solve the above problems, a mechanical lifting device provided in the present application adopts the following technical solution, including: an installation arm 100 and a movable joint arm 200, the movable joint arm 200 is inserted in the installation arm 100, and is slidingly connected to the inner wall of the installation arm 100, the movable joint arm 200 has the freedom of movement along the length direction of the installation arm 100, the movable joint arm 200 has multiple, and the multiple movable joint arms 200 are inserted in sequence. The movable joint arm 200 includes: a first limit member 210 and a second limit member 220, the first limit member 210 is arranged on the inner wall of the movable joint arm 200; the second limit member 220 is arranged on the outer wall of the movable joint arm 200, the first limit member 210 on the multiple movable joint arms 200 inserted in sequence is cooperated and connected with the adjacent second limit member 220 to limit the deflection of the multiple movable joint arms 200 during the extension and retraction process.

[0031] For details, please refer to Figure 1-2 The mounting arm 100 is a fixing part and is the mounting body of the entire device. The mounting arm 100 is preferably formed by connecting steel plates end to end and enclosing and splicing. The mounting arm 100 includes at least one accommodating space connected to the outside world, which is used to accommodate the movable joint arm 200 in a telescopic state; the mounting arm 100 is also provided with a limit block, which can prevent the movable joint arm 200 from exceeding a certain limited position when retracted.

[0032] Please refer to Figure 3-4 , movable joint arm 200, the structure of the movable joint arm 200 is similar to that of the mounting arm 100, and has a accommodating space. The movable joint arm 200 is preferably formed by connecting steel plates end to end and enclosing and splicing; the movable joint arm 200 is slidably connected to the inner wall of the mounting arm 100, and a slider is provided on the movable joint arm 200, and a guide rail matching the slider is provided on the mounting arm 100, so that the movable joint arm 200 has a degree of freedom of movement along the length direction of the joint arm, and the movable joint arm 200 can be moved outward or retracted from the accommodating space in the mounting arm 100; there are multiple movable joint arms 200 in the present application, and the multiple ones are two or more; the shape and structure of the multiple movable joint arms 200 are the same or substantially the same, and only the size is different, so the multiple movable joint arms 200 can be mutually nested according to the size, and the smaller movable joint arms 200 are inserted into the larger movable joint arms 200 in turn, and each arm section is slidably connected, and a gap is left between two adjacent joint arms in each movable joint arm 200 for the extension and retraction of each movable joint arm 200.

[0033] Among them, the movable joint arm 200 includes a first limit member 210 and a second limit member 220, the first limit member 210 is arranged on the inner wall of the movable joint arm 200, and the second limit member 220 is installed on the outer wall of the second joint arm, and the installation method of the first limit member 210 and the second limit member 220 is one or more of bolt connection, welding, and clamping; the first limit member 210 and the second limit member 220 are arranged in coordination, and the two are movably connected to facilitate the extension or retraction of each movable joint arm 200, and the first limit member 210 and the second limit member 220 are located in the gap between two adjacent movable joint arms 200. The setting of the first limit member 210 and the second limit member 220 enhances the connection strength between the two adjacent movable joint arms 200, and at the same time, the cooperation of the first limit member 210 and the second limit member 220 can limit the deflection angle of the movable joint arm 200 in multiple directions, thereby improving the stability of each movable joint arm 200 during the extension process. In the present application, the first limit member 210 can be a slider and a slide rail that are interlocked with each other, or an "L"-shaped steel plate that can be interlocked; the first limit member 210 and the second limit member 220 can be installed on the end face of any end of the movable joint arm 200 or be arranged on multiple end faces. Specifically, it can be set according to the lifting position and extension angle of the heavy object. There is no restriction on this and it can be selected according to the actual situation.

[0034] The first limiting member 210 includes a receiving cavity 211, and the second limiting member 220 includes at least one protrusion 221, and the protrusion 221 can be snap-fitted with the receiving cavity 211. Specifically, in the present application, the first limiting member 210 includes a receiving cavity, and a plurality of limiting planes are preferably provided in the receiving cavity, and the plurality of limiting planes can form a groove, and the width of the groove is greater than the width of the receiving groove opening; the second limiting member 220 includes a protrusion 221 adapted to the shape of the receiving cavity, and the protrusion of the second limiting member 220 cooperates with the receiving cavity 211. Due to the existence of the limiting plane in the receiving cavity 211, the deflection of the second limiting member 220 and the movable joint arm 200 connected to the second limiting member 220 can be limited, thereby improving the stability of the connection between each movable joint arm 200. ; It can be imagined that the shape of the accommodating cavity 211 and the shape of the protrusion 221 can be various, and the specific shape can be selected according to actual conditions, as long as it can ensure that the deflection can be limited; in one embodiment, the first limit member 210 and the second limit member 220 can be a slider and a slide rail that cooperate with each other. Preferably, the slide rail includes a transverse extension portion, and the slider is semi-enclosed and inserted on the outside of the extension portion. The slide rail and the slider can not only guide the second arm to move along the length direction, but also limit the deflection of the second arm to the left and right relative to the first arm, thereby ensuring the stability of the lifting device.

[0035] The first stopper 210 and the second stopper 220 are both installed on the upper end of the movable joint arm 200. In one embodiment, the first stopper 210 and the second stopper 220 are both installed on the upper end of the movable joint arm 200, and multiple first stoppers 210 are arranged in a stepped manner on multiple movable joint arms 200. No first stopper 210 is arranged at the bottom of the movable joint arm 200 to reduce the spacing between the movable joint arms 200; when the movable joint arm 200 is hoisting heavy objects, since the gravity of the object is downward, the downward heavy object will give the movable joint arm 200 a downward pressure. By installing the first stopper 210 and the second stopper 220 on the upper surface of the movable joint arm 200, the movable joint arm 200 can withstand a greater weight during the hoisting process.

[0036] Further, the first stopper 210 is block-shaped, and a plurality of first stoppers 210 are arranged in an array along the length direction of the movable joint arm 200; the second stopper 220 is strip-shaped, and the length of the second stopper 220 is greater than the length of the first stopper 210 connected thereto. Specifically, in one embodiment, the first stopper 210 is block-shaped, and a plurality of block-shaped first stoppers 210 are arranged at intervals on the upper surface of the inside of the movable joint arm 200 along the extension direction of the movable joint arm 200; the second stopper 220 is strip-shaped, and the length of the second stopper 220 is greater than the length of the first stopper 210 connected thereto; when the movable joint arm 200 is subjected to downward pressure, the upper surface of the movable joint arm 200 will deform, so the first stopper 210 will also deform accordingly; by making the first stopper 210 block-shaped and having gaps between the first stoppers 210, a certain deformation space can be left between the first stoppers 210, thereby improving the strength of the first stopper 210 and improving the stability.

[0037] Please refer to Figure 4 The movable joint arm 200 also includes: a mounting portion 230, a synchronous gear 240 and a synchronous rack 250. The mounting portion 230 passes through at least one side wall of the movable joint arm 200. There are multiple synchronous racks 250, and the multiple synchronous racks 250 are respectively mounted on the inner and outer walls of the movable joint arm 200; the synchronous gear 240 is mounted on the mounting portion 230, and the synchronous gear 240 has a rotational freedom around its axis. The synchronous gear 240 can be respectively meshed and connected with the corresponding synchronous racks 250 arranged on the adjacent movable joint arms 200.

[0038] Specifically, in one embodiment, the mounting portion 230 is a mounting groove that passes through the side of the movable joint arm 200, and the synchronous gear 240 is mounted on the mounting portion 230, and has the rotational freedom to rotate around its axis, and the diameter of the synchronous gear 240 is greater than the thickness of the side wall of the movable joint arm 200 on which the movable joint arm 200 is installed; the synchronous rack 250 is respectively mounted on the inner wall and the outer wall of the movable joint arm 200, and the synchronous gear 240 located on the middle movable joint arm 200 can be meshed and connected with the synchronous rack 250 correspondingly arranged on the movable joint arms 200 located on the inner and outer sides of the middle movable joint arm 200; in the present application, the installation position of the synchronous rack 250 depends on the installation position of the synchronous gear 240 and each movable joint arm 200, and the synchronous gear 240 can drive the synchronous rack 250 located inside to move relative to each other when rotating.

[0039] Further, the inner wall of the mounting arm 100 is provided with a fixed rack, which can be meshed with the synchronous gear 240. The fixed rack is meshed with the synchronous gear 240, and the mounting arm 100 is a fixed part. When the movable joint arm 200 moves, the synchronous gear 240 meshed with the fixed rack starts to rotate relative to the fixed rack, and as the synchronous gear 240 rotates, the synchronous rack 250 meshed with it and located on the adjacent inner movable joint arm 200 starts to move, and as the synchronous rack 250 moves, the movable joint arm 200 located inside starts to move; it can be imagined that the synchronous gear 240 and the synchronous rack 250 on each movable joint arm 200 are similar to them, and under the same transmission, each movable joint arm 200 can be extended or retracted synchronously; by providing multiple synchronous gears 240 and multiple synchronous racks 250, multiple movable joint arms 200 can be extended and retracted synchronously; in other embodiments, other synchronous transmission components such as wire rope synchronous extension and retraction, plate chain synchronous extension and retraction, etc. can also be used. It can be imagined that since the transmission is carried out by the meshing parts, the meshing parts can improve the stability of multiple movable connecting parts while ensuring the accuracy.

[0040] Please refer to Figure 1 The movable joint arm 200 includes a lifting arm 260, which is located at the innermost side of the plurality of movable joint arms 200 inserted in sequence, and the lifting arm 260 includes a lifting part 261. Specifically, the third joint arm is located at the innermost side of the plurality of movable joint arms 200 inserted in sequence, and the lifting arm 260 has a degree of freedom of movement along the length direction, and a lifting part 261 is provided on the lifting arm 260, and the lifting part 261 is used to connect a heavy object, and the lifting part 261 can be a hook, a manipulator, a hook, etc.

[0041] The synchronous gears 240 on the multiple joint arms 200 are arranged at intervals in the vertical direction. In one embodiment, the multiple synchronous gears 240 are respectively installed on the mounting portion 230 of the joint arm 200 in the vertical direction, and correspondingly, the synchronous racks 250 are also arranged at intervals in the vertical direction on the joint arm of the joint arm 200. Such an arrangement makes it possible for the synchronous gears 240 to be at different heights and not interfere with each other when contracted, and also reduces the gap in the lateral direction, while increasing stability.

[0042] The mechanical lifting device also includes a mechanical drive assembly 300, which includes: a crank 310, a reduction box 320 and a transmission screw 330. The output end of the crank 310 is connected to the input end of the reduction box 320. The reduction box 320 and the transmission screw 330 are arranged in the installation arm 100, and the output end of the transmission screw 330 is connected to the movable joint arm 200.

[0043] like Figure 5-6 As shown, the mechanical lifting device includes a mechanical drive assembly 300, which includes: a crank 310, a reduction box 320 and a transmission screw 330. The output end of the crank 310 is connected to the input end of the reduction box 320, the reduction box 320; the transmission screw 330 is arranged in the installation arm 100, and the output end of the transmission screw 330 is connected to the movable joint arm 200. The crank 310 is installed in a lower position so that the operator can operate it more conveniently. The crank 310 is preferably in the format of a hand wheel, and the output is rotated by the operator; the reduction box 320, the input end of the reduction box 320 is connected to the output end of the crank 310, and a steering member can also be arranged between the crank 310 and the reduction box 320, and the steering member is connected to the reduction box 320 through a coupling. The input end of the reduction box 320 is connected; in one embodiment, the reduction box 320 is installed on the outer wall at the top of the mounting arm 100, and an engaging piece is provided at the output end of the reduction box 320. The outer wall at the top of the mounting arm 100 is provided with a transmission groove installed corresponding to the engaging piece. The mounting arm 100 is provided with a transmission engaging piece that is arranged in cooperation with the aforementioned engaging piece, and the engaging piece serves as the output end of the reduction box 320; a transmission screw rod 330, the input end of the transmission screw rod 330 is connected to the transmission engaging piece, and the output end of the transmission screw rod 330 is connected to the movable joint arm 200. The rotation of the transmission engaging piece drives the screw rod to rotate, and the transmission screw rod 330 rotates the slider located at the output end of the transmission screw rod 330 to slide, thereby driving the movable joint arm 200 to move, and then driving the entire telescopic joint arm to extend and retract synchronously.

[0044] The mounting arm 100 includes at least one visible portion 110, and the visible portion 110 is arranged corresponding to the outermost movable joint arm 100 to obtain the moving state of the movable joint arm 200. The visible portion 110 is arranged on the mounting portion 230. The mounting arm 100 includes at least one notch, and the position of the notch is arranged corresponding to the movable joint arm 200. The visible portion 100 is installed at the notch, and the operator or the detection device can observe the moving state of the movable joint arm 200 through the notch. The visible portion 110 can be made of glass, transparent acrylic plate and other materials; preferably, a scale is arranged on the first joint arm, and the scale is arranged corresponding to the visible portion 110. The readings can be directly read through the visible portion 110 and the scale, and the total displacement of the telescopic arm can be obtained by calculation.

[0045] Principle / Steps

[0046] The operator shakes the crank handle 310 to transmit power to the reduction box 320. The output end of the reduction box 320 rotates, driving the transmission screw 330 meshing with it to rotate. The slider located at the output end of the transmission screw 330 moves linearly along the length direction, driving the outermost movable joint arm 200 connected to it to move along its length direction; at this time, through the transmission between the synchronous gear 240, the synchronous rack 250 and the fixed rack, multiple movable joint arms 200 can be extended or retracted synchronously, and the synchronous extension or retraction of multiple movable joint arms 200 is completed. During the extension process of each movable joint arm 200, the cooperation of the first limit member 210 and the second limit member 220 ensures the stability of each movable joint arm 200; the operator who shakes the crank can observe the extension distance of the first joint arm or the entire movable arm group in real time by observing the visible part 110 located on the base; conversely, when the movable joint arm 200 needs to be retracted, it can be completed by shaking the crank arm in the opposite direction.

[0047] Technical effects:

[0048] 1. The present application provides a mechanical lifting device, in which a first limit member 210 and a second limit member 220 that can cooperate with each other are arranged in a movable joint arm 200. The first limit member 210 and the second limit member 220 slide and cooperate with each other during the extension of the movable joint arm 200, thereby avoiding possible deflection of each joint arm during the synchronous extension process, so that the telescopic arm can hang heavy objects even during the extension and retraction process, thereby improving the working efficiency and lifting accuracy of the mechanical lifting device.

[0049] 2. The present application provides a mechanical lifting device, which enables multiple movable joint arms 200 to be extended synchronously by setting a synchronous transmission component, thereby improving the telescopic efficiency of the movable joint arms 200 and avoiding the influence of thinner arm sections when a single section is extended, so that the telescopic arm can hang heavy objects even during the extension and retraction process, thereby improving the working efficiency and lifting accuracy of the mechanical lifting device.

[0050] 3. The present application provides a mechanical lifting device, in which the second limit piece 220 is block-shaped. Multiple second limit pieces 220 on the same movable joint arm 200 are arranged in an array along the length direction of the movable joint arm 200. Since the movable joint arm 200 will produce bending deformation under the influence of the gravity of the suspended object, the upper surface of the movable joint arm 200 will have a gap in the second limit piece 220 when it is deformed, which can avoid possible damage to the second limit piece 220.

[0051] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A mechanical lifting device, characterized in that: include: Mounting arm (100); A movable joint arm (200), the movable joint arm (200) is inserted into the mounting arm (100), and is slidably connected to the inner wall of the mounting arm (100), the movable joint arm (200) has a degree of freedom of movement along the length direction of the mounting arm (100), the movable joint arm (200) has a plurality of movable joint arms (200), and the plurality of movable joint arms (200) are inserted in sequence, and the movable joint arm (200) comprises: A first limiting member (210), wherein the first limiting member (210) is arranged on the inner wall of the movable joint arm (200); A second limiting member (220) is arranged on the outer wall of the movable joint arm (200), and the first limiting members (210) on the plurality of movable joint arms (200) inserted in sequence are matched and connected with the adjacent second limiting members (220) to limit the deflection of the plurality of movable joint arms (200) during the extension and retraction process.

2. The mechanical lifting device according to claim 1, characterized in that: The first limiting member (210) comprises a receiving cavity (211), and the second limiting member (220) comprises at least one protrusion (221), and the protrusion (221) can be snap-fitted with the receiving cavity (211).

3. The mechanical lifting device according to claim 1, characterized in that: The first limiting member (210) and the second limiting member (220) are both installed on the upper end of the movable joint arm (200).

4. The mechanical lifting device according to claim 3, characterized in that: The first limiting member (210) is block-shaped, and a plurality of first limiting members (210) are arranged in an array along the length direction of the movable joint arm (200); The second limiting member (220) is in the shape of a strip, and the length of the second limiting member (220) is greater than the length of the first limiting member (210) that is matched and connected thereto.

5. The mechanical lifting device according to claim 1, characterized in that: The movable joint arm (200) further comprises: A mounting portion (230), the mounting portion (230) penetrating at least one side wall of the movable joint arm (200); A synchronous rack (250), wherein the synchronous rack (250) has a plurality of synchronous racks, and the plurality of synchronous racks (250) are respectively mounted on the inner and outer walls of the movable joint arm (200); A synchronous gear (240), the synchronous gear (240) is mounted on the mounting portion (230), the synchronous gear (240) has a rotational freedom around its axis, and the synchronous gear (240) can be meshed and connected with corresponding synchronous racks (250) arranged on the inner and outer movable joint arms (200), respectively.

6. The mechanical lifting device according to claim 5, characterized in that: The inner wall of the mounting arm (100) is provided with a fixed rack, and the fixed rack is meshedly connected with a synchronous gear (240) located on the inner side of the mounting arm (100).

7. The mechanical lifting device according to claim 6, characterized in that: The synchronous gears (240) on the plurality of movable joint arms (200) are arranged at intervals in the vertical direction.

8. The mechanical lifting device according to claim 6, characterized in that: The movable joint arm (200) comprises a hoisting arm (260), the hoisting arm (260) is located at the innermost side of the plurality of movable joint arms (200) inserted in sequence, and the hoisting arm (260) comprises a hoisting portion (261).

9. The mechanical lifting device according to claim 2, characterized in that: The mechanical lifting device further comprises a mechanical driving assembly (300), wherein the driving assembly comprises: A crank (310); A reduction box (320), the reduction box (320) being mounted on the mounting arm (100), and the input end of the reduction box (320) being connected to the output end of the crank (310); A transmission screw (330), wherein the transmission screw (330) is arranged in the mounting arm (100), the input end of the transmission screw (330) is connected to the output end of the reduction box (320), and the output end of the transmission screw (330) is connected to the movable joint arm.

10. The mechanical lifting device according to claim 2, characterized in that: The mounting arm (100) comprises at least one visible portion (110), and the visible portion (110) is made of a transparent material.

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