Fine adjustment lifting device in a confined space

Abstract

The utility model discloses a kind of fine adjustment lifting devices in narrow space, including the support frame being equipped on support seat, transmission screw rod is equipped on support frame, the both ends of transmission screw rod are all connected with transmission nut by rolling;Upper swing arm and lower swing arm are all movably connected with transmission nut on transmission nut by pin shaft one;The free end of lower swing arm is all movably connected with hinged support by pin shaft two;The upper end of lifting mechanism is equipped with lifting bracket, the free end of upper swing arm is all movably connected with lifting bracket by pin shaft three, the free end of upper swing arm is fixedly connected with pin shaft three;Transmission gear is all fixedly equipped on pin shaft three, lifting bracket is equipped with two intermeshing meshing gears, two meshing gears are located between transmission gear on both sides, transmission gear and its corresponding meshing gear intermeshing;The utility model has lifting action precision high, stability is good, and has the function of fine adjustment lifting object angle, degree of integration is high, with advantages such as small space occupation.

Description

Technical Field

[0001] This utility model relates to the field of lifting mechanism technology, specifically a fine-tuning lifting device for confined spaces. Background Technology

[0002] Lifting operations are necessary in confined spaces where workers cannot access them. Existing lifting devices primarily use hydraulic systems to raise and lower goods. However, these hydraulic systems are not only complex in structure but also prone to oil leaks during long-term use. Patent publication number CN211444880U discloses a gear meshing mechanism for a low-point lifting device. Specifically, it discloses that rotating arms are hinged to the transmission nuts at both ends of a bidirectional spiral screw, and one end of each rotating arm has a fan-shaped meshing part. The rotating arms mesh and transmit power through the fan-shaped meshing part. However, this mechanism suffers from problems such as low lifting accuracy, poor stability, and lack of function for fine-tuning the angle of the lifted object. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a fine-tuning lifting device in a small space. The lifting action has high precision, good stability, strong load-bearing capacity, and the function of fine-tuning the angle of the object being lifted. It has a high degree of integration, occupies little space, and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fine-tuning lifting device for confined spaces, comprising a lifting mechanism mounted on a support base. The lifting mechanism includes a support frame, on which a horizontally mounted transmission screw is rotatably mounted. The transmission screw is a bidirectional helical screw, and both ends of the transmission screw are rolledly connected to transmission nuts. Each transmission nut is movably connected to an upper swing arm and a lower swing arm, which can swing vertically, via a pin. A hinged bracket is also fixedly mounted on the support frame below the transmission screw, and the free ends of the lower swing arms are movably connected to the hinged bracket via a pin. A lifting bracket is mounted at the upper end of the lifting mechanism, and the free ends of the upper swing arms are movably connected to the bottom end of the lifting bracket via a pin. A transmission gear is fixedly mounted on each pin. The bottom end of the lifting bracket is rotatably connected to two meshing gears via two pins parallel to pins. The two meshing gears are located between the transmission gears on both sides, and the transmission gears mesh with their corresponding meshing gears.

[0005] Furthermore, each of the free ends of the lower swing arms is provided with a fan-shaped tooth meshing part, and the fan-shaped tooth meshing parts between the lower swing arms mesh with each other.

[0006] Furthermore, the sector-shaped gear meshing part is a double sector-shaped interlaced gear. The sector-shaped gear meshing part includes a sector-shaped gear one and a sector-shaped gear two arranged back and forth along its axial direction. The sector-shaped gear one and the sector-shaped gear two are coaxially arranged and are integral with the lower swing arm. The meshing teeth of the sector-shaped gear one and the meshing teeth of the sector-shaped gear two are arranged alternately.

[0007] Furthermore, the transmission gear is a double circular arc staggered gear, which includes a circular arc gear one and a circular arc gear two arranged back and forth along its axial direction. The circular arc gear one and the circular arc gear two are coaxially arranged, and the meshing teeth of the circular arc gear one and the meshing teeth of the circular arc gear two are staggered; and the meshing gear has the same structure as the transmission gear.

[0008] Furthermore, the circular arc gear one and the circular arc gear two of the transmission gear are an integral structure.

[0009] Furthermore, the outer circumferential wall of the pin shaft three is provided with a spline, the inner circumferential wall of the transmission gear is provided with a keyway one that matches the spline, and the connection between the upper rocker arm and the pin shaft three is provided with a keyway two that matches the spline.

[0010] Furthermore, the support base is a box structure with an open top, the support frame is an arc-shaped plate structure and is set inside the support base, and an angle adjustment mechanism is provided between the support base and the support frame. The angle adjustment mechanism includes a transmission worm gear horizontally arranged at the bottom of the support base, and a transmission tooth groove adapted to the transmission worm gear is opened on the arc-shaped bottom wall of the support frame; an arc-shaped slide rail is fixedly arranged on the arc-shaped side wall of the support frame, and an arc-shaped slider adapted to the arc-shaped slide rail is fixedly arranged on the inner wall of the support base.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This micro-adjustment lifting device in a confined space drives the transmission screw to rotate, causing the transmission nuts on both sides to move closer or further apart. The lower swing arms on both sides engage with each other through a sector-shaped gear meshing part to open and close. At the same time, the upper swing arms on both sides engage with each other through a transmission gear and a meshing gear to open and close, thereby lifting the object by the lifting bracket. The opening and closing action between the lower and upper swing arms is highly accurate and smooth. This micro-adjustment lifting device has high action accuracy, good stability, and strong load-bearing capacity. Moreover, the angle of the object being lifted can be finely adjusted through the angle adjustment mechanism. It has a high degree of integration and occupies little space. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a perspective view of the present utility model; Figure 3 This is an exploded view of the present invention; Figure 4 This is a schematic diagram of the support frame structure of this utility model; Figure 5 This is a perspective view of the lifting transmission unit of this utility model; Figure 6 This is a front view of the lifting transmission unit of this utility model; Figure 7 This is a schematic diagram of the movable connection structure between the upper and lower swing arms and the transmission nut of this utility model; Figure 8 This is a schematic diagram of the transmission gear and pin shaft of this utility model. Figure 9 This is a schematic diagram of the meshing gear structure of this utility model; Figure 10 This is a schematic diagram of the angle adjustment mechanism of this utility model.

[0013] In the diagram: 1. Support base; 2. Lifting mechanism; 21. Support frame; 211. Hinge bracket; 212. Transmission gear groove; 22. Transmission screw; 23. Transmission nut; 24. Upper swing arm; 25. Lower swing arm; 251. Sector gear meshing part; 2511. Sector gear one; 2512. Sector gear two; 26. Transmission gear; 261. Circular arc gear one; 262. Circular arc gear two; 27. Meshing gear; 3. Lifting bracket; 4. Angle adjustment mechanism; 41. Transmission worm; 42. Circular arc slide rail; 43. Arc slider; 5. Pin one; 6. Pin two; 7. Pin three; 71. Spline; 8. Pin four. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0015] Please see Figure 1-6This utility model provides a technical solution: a fine-tuning lifting device for confined spaces, comprising a lifting mechanism 2 mounted on a support base 1. The lifting mechanism 2 includes a support frame 21, on which a horizontally mounted transmission screw 22 is rotatably mounted. The transmission screw 22 is a bidirectional helical screw, and both ends of the transmission screw 22 are rolledly connected to transmission nuts 23. A drive motor capable of driving the transmission screw 22 is mounted on the support frame 21. An upper swing arm 24 and a lower swing arm 25 capable of vertical swinging are movably connected to the transmission nuts 23 via pins 5. A hinged bracket 211 is also fixedly mounted on the support frame 21 below the transmission screw 22. The free ends of the lower swing arms 25 are connected to the hinged bracket via pins 6. The frame 211 is movably connected, and the free ends of the lower swing arms 25 are all provided with sector-shaped tooth meshing parts 251, and the sector-shaped tooth meshing parts 251 between the lower swing arms 25 mesh with each other; the upper end of the lifting mechanism 2 is provided with a lifting bracket 3, and the free ends of the upper swing arms 24 are all movably connected to the bottom end of the lifting bracket 3 through pin three 7, and the free ends of the upper swing arms 24 are fixedly connected to pin three 7; each pin three 7 is fixedly provided with a transmission gear 26, and the bottom end of the lifting bracket 3 is rotatably connected to two meshing gears 27 through two pin four 8 arranged parallel to pin three 7. The two meshing gears 27 are located between the transmission gears 26 on both sides, and the transmission gears 26 mesh with their corresponding meshing gears 27.

[0016] When the fine-tuning lifting device in a confined space is in operation, the transmission screw 22 rotates, causing the transmission nuts 23 on both sides to move closer or further apart. The fan-shaped teeth meshing parts 251 of the lower swing arms 25 on both sides mesh with each other, causing the lower swing arms 25 to open and close. At the same time, the transmission gears 26 on the upper swing arms 24 on both sides mesh with their corresponding meshing gears 27, causing the meshing gears 27 to rotate and mesh, causing the upper swing arms 24 to open and close, thereby lifting the object by the lifting bracket 3.

[0017] Please refer to the following: Figure 7-9 The sector gear meshing part 251 is a double sector gear. The sector gear meshing part 251 includes a sector gear one 2511 and a sector gear two 2512 arranged back and forth along its axial direction. The sector gear one 2511 and the sector gear two 2512 are coaxially arranged and are integral with the lower swing arm 25. The meshing teeth of the sector gear one 2511 and the meshing teeth of the sector gear two 2512 are arranged alternately. When the sector gear meshing parts 251 between the lower swing arms 25 are engaged in transmission, the meshing teeth of sector gear one 2511 and sector gear two 2512 are arranged alternately. When sector gear one 2511 between the sector gear meshing parts 251 is in the meshing transmission state, sector gear two 2512 between the sector gear meshing parts 251 is in the transmission gap state. After the sector gear meshing parts 251 between the lower swing arms 25 continue to mesh in transmission, sector gear one 2511 between the sector gear meshing parts 251 is in the transmission gap state, and sector gear two 2512 between the sector gear meshing parts 251 is in the meshing transmission state. This process is repeated to reduce the relative sliding of sector gear meshing parts 251 between the lower swing arms 25, achieve continuous transmission, and ensure high precision and smooth operation of the opening and closing action between the lower swing arms 25, as well as high load-bearing transmission power. The transmission gear 26 is a double circular arc interlaced gear, which includes a circular arc gear 1 261 and a circular arc gear 262 arranged back and forth along its axial direction. The circular arc gear 1 261 and the circular arc gear 262 are coaxially arranged and integrated into one structure, and the meshing teeth of the circular arc gear 1 261 and the meshing teeth of the circular arc gear 262 are arranged in an interlaced manner. The meshing gear 27 has the same structure as the transmission gear 26. The outer circumferential wall of the pin shaft 3 7 is provided with a spline 71, and the inner circumferential wall of the transmission gear 26 is provided with a keyway 1 that matches the spline 71. The connection between the upper rocker arm 24 and the pin shaft 3 7 is provided with a keyway 2 that matches the spline 71. When the transmission gear 26 and meshing gear 27 between the upper swing arms 24 are engaged, the meshing teeth of the first circular gear 261 and the second circular gear 262 are arranged alternately. When the first circular gear 261 between the transmission gear 26 and the meshing gear 27 is in a meshing state, the second circular gear 262 between the transmission gear 26 and the meshing gear 27 is in a transmission gap state. After the transmission gear 26 and the meshing gear 27 continue to mesh, when the first circular gear 261 between the transmission gear 26 and the meshing gear 27 is in a transmission gap state, the second circular gear 262 between the transmission gear 26 and the meshing gear 27 is in a meshing state. This process is repeated to reduce the relative sliding between the transmission gear 26 and the meshing gear 27 and achieve continuous transmission. Similarly, continuous transmission is also achieved between the meshing gears 27. The opening and closing action of the upper swing arms 24 has high precision, smooth operation, and high load-bearing transmission force.

[0018] Please refer to the following: Figure 10The support base 1 is a box structure with an open top. The support frame 21 is an arc-shaped plate structure and is set inside the support base 1. An angle adjustment mechanism 4 is provided between the support base 1 and the support frame 21. The angle adjustment mechanism 4 includes a transmission worm gear 41 horizontally arranged at the bottom of the support base 1. The arc-shaped bottom wall of the support frame 21 has a transmission tooth groove 212 adapted to the transmission worm gear 41. An arc-shaped slide rail 42 is fixedly arranged on the arc-shaped side wall of the support frame 21, and an arc-shaped slider 43 adapted to the arc-shaped slide rail 42 is fixedly arranged on the inner wall of the support base 1. When the object in the lifting bracket 3 needs to be finely adjusted, the transmission worm gear 41 rotates so that it meshes with the transmission tooth groove 212 on the arc-shaped bottom wall of the support frame 21. The support frame 21 rotates through the sliding cooperation of the arc-shaped slide rail 42 and the arc-shaped slider 43 to realize the function of finely adjusting the angle of the object.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fine-tuning lifting device for confined spaces, comprising a lifting mechanism mounted on a support base, characterized in that: The lifting mechanism includes a support frame, on which a horizontally mounted transmission screw is rotatably installed. The transmission screw is a double-sided helical screw, and both ends of the transmission screw are rolledly connected to transmission nuts. Each transmission nut is movably connected to an upper swing arm and a lower swing arm, which can swing vertically, via a pin. A hinge bracket is also fixedly installed on the support frame below the transmission screw. The free ends of the lower swing arms are movably connected to the hinge bracket via a pin. A lifting bracket is provided at the upper end of the lifting mechanism. The free ends of the upper swing arms are movably connected to the bottom end of the lifting bracket via a pin, and the free ends of the upper swing arms are fixedly connected to the pin. Each pin is fixedly equipped with a transmission gear. The bottom end of the lifting bracket is rotatably connected to two meshing gears via two pins parallel to the pins. The two meshing gears are located between the transmission gears on both sides, and the transmission gears mesh with their corresponding meshing gears.

2. The fine-tuning lifting device for confined spaces according to claim 1, characterized in that: The free ends of the lower swing arms are all provided with fan-shaped teeth meshing parts, and the fan-shaped teeth meshing parts between the lower swing arms mesh with each other.

3. The fine-tuning lifting device for confined spaces according to claim 2, characterized in that: The sector gear meshing part is a double sector gear. The sector gear meshing part includes a sector gear one and a sector gear two arranged back and forth along its axial direction. The sector gear one and the sector gear two are coaxially arranged and are integral with the lower swing arm. The meshing teeth of the sector gear one and the meshing teeth of the sector gear two are arranged alternately.

4. The fine-tuning lifting device for confined spaces according to claim 1, characterized in that: The transmission gear is a double circular arc interlaced gear, which includes a circular arc gear one and a circular arc gear two arranged back and forth along its axial direction. The circular arc gear one and the circular arc gear two are coaxially arranged, and the meshing teeth of the circular arc gear one and the meshing teeth of the circular arc gear two are arranged alternately. The circular arc gear one and the circular arc gear two of the transmission gear are an integral structure, and the meshing gear has the same structure as the transmission gear.

5. The fine-tuning lifting device for confined spaces according to claim 1, characterized in that: The outer circumferential wall of the pin shaft three is provided with a spline, the inner circumferential wall of the transmission gear is provided with a keyway one that matches the spline, and the connection between the upper rocker arm and the pin shaft three is provided with a keyway two that matches the spline.

6. The fine-tuning lifting device for confined spaces according to claim 1, characterized in that: The support base is a box structure with an open top, and the support frame is an arc-shaped plate structure set inside the support base. An angle adjustment mechanism is provided between the support base and the support frame. The angle adjustment mechanism includes a transmission worm gear horizontally arranged at the bottom of the support base, and a transmission tooth groove adapted to the transmission worm gear is opened on the arc-shaped bottom wall of the support frame. An arc-shaped slide rail is fixedly arranged on the arc-shaped side wall of the support frame, and an arc-shaped slider adapted to the arc-shaped slide rail is fixedly arranged on the inner wall of the support base.

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