A rotating shaft mechanism

Abstract

The utility model relates to a kind of pivot mechanism in the field of pivot, including base, hollow support tube is connected with pairing on the base, the inside of support tube is connected with vertical shaft by connecting piece, vertical shaft one end passes through support tube and is formed with connecting portion and extends outward, connecting portion is connected with elbow pipe, one end of elbow pipe is connected with connecting portion by first mounting joint and pairing connection is carried out, so that vertical shaft can drive elbow pipe to rotate horizontally by first mounting joint, the other end of elbow pipe is connected with horizontal shaft by second mounting joint, and connecting bracket is installed with pairing on horizontal shaft by mounting piece, support portion is formed on connecting bracket, and the through-hole for passing through horizontal shaft is formed on connecting bracket, so that connecting bracket can be turned up and down around horizontal shaft by mounting piece, the utility model is improved by the setting of vertical shaft and horizontal shaft The stability, reliability and durability of pivot mechanism under motion are improved by the support of pivot mechanism rotating structure.

Description

Technical Field

[0001] This utility model relates to the field of rotating shafts, and specifically to a rotating shaft mechanism. Background Technology

[0002] As a core component in mechanical structures enabling multi-dimensional rotation, the pivot mechanism is widely used in electronic equipment, security monitoring, industrial robots, and medical devices. The pivot mechanism achieves combined horizontal and vertical (tilting) movements through rotation, meeting user needs for viewing angle adjustment, spatial adaptation, and functional expansion. With equipment evolving towards lighter weight, higher precision, and longer lifespan, the performance of the pivot mechanism directly determines the user experience, structural stability, and reliability of the equipment.

[0003] Existing pivot mechanisms typically employ a single-axis or dual-axis design, achieving rotation through the cooperation of the shaft and bearings. For example, a pivot mechanism supported by a display screen can achieve horizontal rotation and vertical tilting; its basic structure includes a rotating shaft, a fixed base, connecting parts, and limiting components. Some designs use friction plates or gear sets to provide damping force to maintain static stability after rotation.

[0004] However, existing rotating shaft mechanisms have the following significant drawbacks when achieving horizontal rotation and vertical flipping: the rotation structure of existing rotating shaft mechanisms is relatively simple, and when subjected to the weight of the equipment or external impact, it is prone to axial offset or radial sway, resulting in jamming, abnormal noise, or angular drift during rotation, affecting control accuracy. In addition, the existing simple connection structure is prone to fatigue fracture during frequent rotation, especially in complex motion scenarios, where the lack of a cooperative force-bearing mechanism between the vertical and horizontal axes significantly increases the risk of structural failure. After long-term use, this affects the durability of the rotating shaft mechanism. There is an urgent need to design an optimized rotation connection structure between the vertical and horizontal axes to improve the stability, reliability, and durability of the rotating shaft mechanism during motion. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned defects and provide a rotating shaft mechanism to solve the technical problem in the background art of how to improve the stability, reliability and durability of the rotating support during the movement of the rotating shaft mechanism through the rotating connection structure.

[0006] The objective of this utility model is achieved through the following means:

[0007] A rotating shaft mechanism includes a base, on which hollow support tubes are paired and connected. A vertical shaft is connected inside the support tubes via a connector. The vertical shaft is coaxially connected to the support tubes and can rotate horizontally. One end of the vertical shaft extends outward through the support tube and forms a connecting part. A bent tube is connected to the connecting part. One end of the bent tube is paired and connected to the connecting part via a first mounting joint, so that the vertical shaft can drive the bent tube to rotate horizontally via the first mounting joint. The other end of the bent tube is connected to a horizontal shaft via a second mounting joint. A connecting bracket is paired and installed on the horizontal shaft via a mounting member. The connecting bracket has a support part and a through hole for the horizontal shaft to pass through, so that the connecting bracket can rotate up and down around the horizontal shaft via the mounting member. The first mounting joint and the second mounting joint are respectively engaged and installed at both ends of the bent tube.

[0008] Furthermore, as described above, the base is provided with a fixing hole, the connector is installed in the fixing hole, one end of the vertical shaft extends through the support tube into the fixing hole and is coaxially connected with the connector, and the end of the vertical shaft near the base is connected to a first damping component.

[0009] By setting fixing holes in the base and installing connectors, the vertical shaft is coaxially connected to the connectors. In addition, the first damping component is set to enhance the stability of the vertical shaft during rotation and improve control accuracy.

[0010] Furthermore, as described above, at least two connecting members are provided, and each connecting member is composed of ball bearings, with the two ball bearings respectively located at both ends of the vertical shaft.

[0011] By installing at least two ball bearings located at both ends of the vertical shaft, the force on the vertical shaft can be distributed more evenly, further reducing the sway and offset of the vertical shaft during rotation, improving the smoothness of rotation, enhancing the stability of the structure when subjected to the weight of the equipment or external impact, and by distributing the two ball bearings at both ends of the vertical shaft, the stability of the vertical shaft during rotation can be enhanced, reducing axial offset and radial sway, avoiding jamming, abnormal noise or angular drift during rotation, and improving control accuracy.

[0012] Furthermore, as described above, the end of the support tube furthest from the base is connected to a locking block. The locking block has a locking hole for the support tube to pass through, a locking part is formed on the locking block, and a locking bolt is provided on the locking block. The end of the support tube is paired with the locking hole, and the locking bolt is inserted into the locking part to lock it, so that the locking hole clamps and locks the support tube.

[0013] The locking block clamps and locks the support tube with locking holes and locking bolts, which can fix the position of the support tube and prevent the support tube from shifting under the rotation of the vertical shaft or other forces, thereby enhancing the stability of the entire rotating shaft mechanism and improving the reliability during the movement process.

[0014] Furthermore, as described above, the locking block is provided with a first limiting piece on the side near the bend, and a limiting protrusion is formed on the limiting piece. The end of the bend near the locking block is connected to a first rotating positioning piece, and a positioning opening is provided on the first rotating positioning piece, so that the rotation of the first rotating positioning piece is stopped and limited by the positioning opening and the limiting protrusion.

[0015] The first limiting plate and the first rotating positioning plate, through the locking and limiting of the positioning opening and the limiting protrusion, can limit the rotation angle of the bent pipe, prevent the bent pipe from rotating excessively, ensure that the bent pipe moves within a suitable angle range, improve the accuracy and reliability of the rotating shaft mechanism, and at the same time avoid damage to the structure due to excessive rotation.

[0016] Furthermore, as described above, the first mounting joint is provided with a first connecting hole for the connecting part to pass through, and the connecting part is fixedly connected to the first connecting hole, so that the bent pipe can be rotated horizontally through the vertical axis.

[0017] The first mounting joint is fixedly connected to the connecting part of the vertical shaft through the first connecting hole, so that the bent tube can rotate horizontally with the vertical shaft. This connection method ensures the reliability of the rotational connection between the bent tube and the vertical shaft, ensures that the bent tube can rotate horizontally stably, and improves the stability of the horizontal rotation function of the rotating shaft mechanism.

[0018] Furthermore, as described above, at least two mounting components are provided, each consisting of needle roller bearings, with the two needle roller bearings paired and mounted at both ends of the through hole of the connecting bracket.

[0019] By installing at least two needle roller bearings in pairs at both ends of the through hole of the connecting bracket, the force of the connecting bracket when it rotates around the horizontal axis can be more evenly distributed, reducing friction and shaking during the rotation process, improving the stability of the connecting bracket when it rotates up and down, enhancing the reliability of the structure in motion scenarios, and reducing the risk of structural failure.

[0020] Furthermore, as described above, one end of the horizontal shaft is coaxially connected to the second mounting joint via the mounting part. The second mounting joint is provided with a second connecting hole for the mounting part to pass through. The mounting part is fixedly connected to the second connecting hole, so that the connecting bracket can rotate up and down around the horizontal shaft via the needle roller bearing. One end of the vertical shaft passes through the through hole and is connected to the second damping component.

[0021] The horizontal axis is coaxially connected to the second mounting joint, and the connecting bracket rotates up and down around the horizontal axis via a needle roller bearing. At the same time, a second damping component is provided to enhance the stability of the connecting bracket when it rotates up and down, improve the reliability of the rotating shaft mechanism's up and down rotation function, and enhance the durability of the structure.

[0022] Furthermore, as described above, the connecting bracket is connected to a second rotating positioning plate near the end of the bent pipe, and a positioning protrusion is formed on the second rotating positioning plate. The end of the bent pipe is connected to a second limiting plate, and a limiting opening is provided on the second limiting plate, so that the rotation of the second rotating positioning plate is stopped and limited by the positioning protrusion and the limiting opening.

[0023] The second rotating positioning plate and the second limiting plate, through the locking and limiting of the positioning protrusion and the limiting opening, can limit the rotation angle of the connecting bracket relative to the bend, prevent the connecting bracket from rotating excessively, ensure that the connecting bracket flips up and down around the horizontal axis within a suitable angle range, improve the accuracy and reliability of the rotating shaft mechanism, and avoid structural damage.

[0024] Furthermore, as described above, both the first damping assembly and the second damping assembly include sequentially stacked friction plates and multiple damping spring plates, so that the ends of the vertical shaft and the horizontal shaft pass through the first damping assembly and the second damping assembly respectively and are locked and limited by locking nuts.

[0025] The first and second damping components consist of sequentially stacked friction plates and multiple damping springs, which are locked and limited by locking nuts. They can provide appropriate damping force when the vertical and horizontal axes rotate or flip, reduce vibration and impact, further enhance the stability of the rotating shaft mechanism during movement, and improve the durability and reliability of the structure.

[0026] The beneficial effects of this utility model are as follows: The support tube and the vertical shaft are coaxially connected through the connector, ensuring accurate axial and radial positioning of the vertical shaft during horizontal rotation. This effectively reduces axial offset and radial sway caused by equipment gravity or external impact. The connecting part of the extended vertical shaft is paired with the bent tube through the first mounting joint, allowing the vertical shaft to stably drive the bent tube to rotate horizontally, improving the horizontal rotation control accuracy and ensuring the continuous reliability of the horizontal rotation action. The other end of the bent tube is connected to the horizontal shaft through the second mounting joint. The connecting bracket is paired with the mounting piece on the horizontal shaft, allowing the connecting bracket to rotate up and down around the horizontal shaft through the stable structure of the mounting piece. This further ensures the reliability and rotation control accuracy of the connecting bracket when it rotates up and down. The setting of the vertical and horizontal shafts improves the support of the rotating structure of the shaft mechanism, reduces the probability of structural failure, and improves the stability, reliability, and durability of the shaft mechanism in motion scenarios. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0028] Figure 2 This is a schematic diagram of the rotating use state of the connecting bracket in this embodiment;

[0029] Figure 3 This is a schematic diagram of the rotating usage state of the bend in this embodiment;

[0030] Figure 4 This is an exploded view of this embodiment;

[0031] Figure 5 This is a side view of this embodiment;

[0032] Figure 6 for Figure 5 Sectional view of AA;

[0033] Figure 7 for Figure 5 Sectional view of BB;

[0034] The reference numerals in the figure are as follows: 1-base, 2-support tube, 3-vertical shaft, 31-connecting part, 4-bend, 5-first mounting joint, 6-second mounting joint, 7-horizontal shaft, 71-mounting part, 8-connecting bracket, 81-support part, 82-through hole, 9-fixing hole, 10-ball bearing, 11-locking block, 12-locking hole, 13-locking part, 14-locking bolt, 15-first limiting piece, 16-limiting protrusion, 17-first rotating positioning piece, 18-positioning opening, 19-needle roller bearing, 20-second rotating positioning piece, 21-positioning protrusion, 22-second limiting piece, 23-limiting opening, 24-friction piece, 25-damping spring, 26-locking nut. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer, the following describes the solution in further detail with reference to the accompanying drawings and embodiments.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] In this embodiment, refer to Figures 1-7The specific implementation of the rotating shaft mechanism includes a base 1, on which hollow support tubes 2 are paired and connected. A vertical shaft 3 is connected to the inside of the support tube 2 through a connector. The vertical shaft 3 is coaxially connected to the support tube 2 and can rotate horizontally. One end of the vertical shaft 3 extends outward through the support tube 2 and forms a connecting part 31. A bent tube 4 is connected to the connecting part 31. One end of the bent tube 4 is paired and connected to the connecting part 31 through a first mounting joint 5, so that the vertical shaft 3 can drive the bent tube 4 to rotate horizontally through the first mounting joint 5. The other end of the bent tube 4 is connected to a horizontal shaft 7 through a second mounting joint 6. A connecting bracket 8 is paired and installed on the horizontal shaft 7 through a mounting member. A support part 81 is formed on the connecting bracket 8, and a through hole 82 for passing through the horizontal shaft 7 is formed on the connecting bracket 8, so that the connecting bracket 8 can rotate up and down around the horizontal shaft 7 through the mounting member. The first mounting joint 5 and the second mounting joint 6 are respectively clamped and installed at both ends of the bent tube 4.

[0039] The base 1 is provided with a fixing hole 9, and the connector is installed in the fixing hole 9. One end of the vertical shaft 3 extends through the support tube 2 into the fixing hole 9 and is coaxially connected with the connector. The end of the vertical shaft 3 near the base 1 is connected to a first damping component.

[0040] By setting a fixing hole 9 in the base 1 and installing a connector, the vertical shaft 3 is coaxially connected with the connector. Furthermore, by setting a first damping component, the stability of the vertical shaft 3 during rotation can be enhanced, and the control accuracy can be improved.

[0041] The connector is provided in at least two parts, and the connector is composed of ball bearings 10. The two ball bearings 10 are respectively located at both ends of the vertical shaft 3.

[0042] By setting at least two ball bearings 10 at each end of the vertical shaft 3, the force on the vertical shaft 3 can be distributed more evenly, further reducing the swaying and offset of the vertical shaft 3 during rotation, improving the smoothness of rotation, enhancing the stability of the structure when subjected to the weight of the equipment or external impact, and by distributing the two ball bearings 10 at each end of the vertical shaft 3, the stability of the vertical shaft 3 during rotation can be enhanced, reducing axial offset and radial sway, avoiding jamming, abnormal noise or angular drift during rotation, and improving control accuracy.

[0043] The end of the support tube 2 away from the base 1 is connected to a locking block 11. The locking block 11 has a locking hole 12 for the support tube 2 to pass through. The locking block 11 has a locking part 13 and a locking bolt 14. The end of the support tube 2 is paired with the locking hole 12. The locking bolt 14 is inserted into the locking part 13 to lock the support tube 2, so that the locking hole 12 clamps and locks the support tube 2.

[0044] The locking block 11 clamps and locks the support tube 2 through the locking hole 12 and the locking bolt 14, which can fix the position of the support tube 2 and prevent the support tube 2 from being displaced when the vertical shaft 3 rotates or is subjected to other forces, thereby enhancing the stability of the entire rotating shaft mechanism and improving the reliability during the movement process.

[0045] The locking block 11 is provided with a first limiting piece 15 on the side near the bend 4. A limiting protrusion 16 is formed on the limiting piece. The end of the bend 4 near the locking block 11 is connected to a first rotating positioning piece 17. A positioning opening 18 is provided on the first rotating positioning piece 17, so that the rotation of the first rotating positioning piece 17 forms a locking limit with the limiting protrusion 16 through the positioning opening 18.

[0046] The first limiting piece 15 and the first rotating positioning piece 17, through the locking and limiting of the positioning opening 18 and the limiting protrusion 16, can limit the rotation angle of the bent pipe 4, prevent the bent pipe 4 from rotating excessively, ensure that the bent pipe 4 moves within a suitable angle range, improve the accuracy and reliability of the rotating shaft mechanism, and at the same time avoid damage to the structure due to excessive rotation.

[0047] The first mounting connector 5 is provided with a first connecting hole for the connecting part 31 to pass through. The connecting part 31 is fixedly connected to the first connecting hole, so that the bent pipe 4 can be rotated horizontally through the vertical shaft 3.

[0048] The first mounting joint 5 is fixedly connected to the connecting part 31 of the vertical shaft 3 through the first connecting hole, so that the bent pipe 4 can rotate horizontally with the vertical shaft 3. This connection method ensures the reliability of the rotational connection between the bent pipe 4 and the vertical shaft 3, ensures that the bent pipe 4 can rotate horizontally stably, and improves the stability of the horizontal rotation function of the rotating shaft mechanism.

[0049] Specifically, in some embodiments, threaded holes are provided on the connecting part 31 and the mounting part 71, and mounting holes coaxially paired with the threaded holes are provided on the first mounting joint 5 and the second mounting joint 6. By passing screws through the mounting holes and locking them with the threaded holes, the firmness and stability of the connection between the mounting joint and the vertical shaft 3 or the horizontal shaft 7 can be further ensured.

[0050] In some embodiments, the connecting part 31 and the mounting part 71 are respectively paired and connected to the first mounting connector 5 and the second mounting connector 6 by snap rings to ensure the firmness of the assembly of the connecting part 31 and the mounting part 71.

[0051] Specifically, in this embodiment, the inside of the bent pipe 4 is fixedly connected to the first mounting joint 5 and the second mounting joint 6 by glue. Both the first mounting joint 5 and the second mounting joint 6 have positioning holes. Both ends of the bent pipe 4 are provided with pin holes for matching the positioning holes. By passing the corresponding pin through the pin hole and inserting it into the positioning hole, the firmness of the connection between the bent pipe 4 and the first mounting joint 5 and the second mounting joint 6 can be further ensured.

[0052] At least two mounting components are provided, each consisting of a needle roller bearing 19. The two needle roller bearings 19 are paired and installed at both ends of the through hole 82 of the connecting bracket 8.

[0053] At least two needle roller bearings 19 are installed in pairs at both ends of the through hole 82 of the connecting bracket 8. This allows the connecting bracket 8 to bear the force more evenly when it rotates around the horizontal axis 7, reducing friction and shaking during the rotation process, improving the stability of the connecting bracket 8 when it rotates up and down, enhancing the reliability of the structure in motion scenarios, and reducing the risk of structural failure.

[0054] One end of the horizontal axis 7 is coaxially connected to the second mounting joint 6 through the mounting part 71. The second mounting joint 6 is provided with a second connecting hole for the mounting part 71 to pass through. The mounting part 71 is fixedly connected to the second connecting hole, so that the connecting bracket 8 can rotate up and down around the horizontal axis 7 through the needle roller bearing 19. One end of the vertical axis 3 passes through the through hole 82 and is connected to the second damping component.

[0055] The horizontal axis 7 is coaxially connected to the second mounting joint 6, and the connecting bracket 8 rotates up and down around the horizontal axis 7 via the needle roller bearing 19. At the same time, a second damping component is provided to enhance the stability of the connecting bracket 8 when it rotates up and down, improve the reliability of the rotating shaft mechanism's up and down rotation function, and enhance the durability of the structure.

[0056] The end of the connecting bracket 8 near the bend 4 is connected to a second rotating positioning plate 20, on which a positioning protrusion 21 is formed. The end of the bend 4 is connected to a second limiting plate 22, on which a limiting opening 23 is provided, so that the rotation of the second rotating positioning plate 20 is stopped and limited by the positioning protrusion 21 and the limiting opening 23.

[0057] The second rotating positioning piece 20 and the second limiting piece 22, through the locking and limiting of the positioning protrusion 21 and the limiting opening 23, can limit the rotation angle of the connecting bracket 8 relative to the bend 4, prevent the connecting bracket 8 from rotating excessively, ensure that the connecting bracket 8 flips up and down around the horizontal axis 7 within a suitable angle range, improve the accuracy and reliability of the rotating shaft mechanism movement, and avoid structural damage.

[0058] The first damping assembly and the second damping assembly each include friction plates 24 stacked in sequence and multiple damping spring plates 25, so that the ends of the vertical shaft 3 and the horizontal shaft 7 pass through the first damping assembly and the second damping assembly respectively and are locked and limited by the locking nut 26.

[0059] The first and second damping components consist of friction plates 24 stacked in sequence and multiple damping springs 25, which are locked and limited by locking nuts 26. They can provide appropriate damping force when the vertical shaft 3 and the horizontal shaft 7 rotate or flip, reduce vibration and impact, further enhance the stability of the rotating shaft mechanism during the movement process, and improve the durability and reliability of the structure.

[0060] Specifically, taking the display screen support hinge mechanism and the monitoring camera pan-tilt unit as an example in this embodiment, the horizontal direction (90° rotation) is achieved through the vertical axis 3, and the connecting bracket 8 connected to the horizontal axis 7 via the needle roller bearing 19 can be rotated vertically (90 degrees up and down) to meet the user's needs for viewing angle adjustment, spatial adaptation, and functional expansion. As equipment develops towards lightweight, high precision, and long lifespan, the performance of the hinge mechanism directly determines the user experience, structural stability, and reliability of the equipment.

[0061] The specific operating principle in this embodiment is as follows:

[0062] The vertical shaft 3 is coaxially connected to the support tube 2 and the base 1 via ball bearings 10. Two ball bearings 10 are respectively positioned at both ends of the vertical shaft 3 to ensure accurate axial and radial positioning during horizontal rotation, effectively reducing axial offset and radial sway caused by equipment gravity or external impact. The extended connecting part 31 of the vertical shaft 3 is paired with the bent tube 4 via the first mounting joint 5, allowing the vertical shaft 3 to stably drive the bent tube 4 to rotate horizontally, improving the horizontal rotation control accuracy and ensuring the continuous reliability of the horizontal rotation action. The locking block 11 is paired with the support tube 2 via the locking hole 12 on the locking block 11, allowing the locking block 11 to be secured by the locking bolt 14. The tension adjustment locking hole 12 locks the clamp of the support tube 2. The bend 4 is made of a right-angle tube, and the other end of the bend 4 is connected to the horizontal shaft 7 through the second mounting joint 6. The connecting bracket 8 is installed on the horizontal shaft 7 through two paired needle roller bearings 19. The connecting bracket 8 has a stable structure that can be rotated up and down around the horizontal shaft 7 through the mounting parts, which further ensures the reliability and rotation control accuracy of the connecting bracket 8 when it is rotated up and down. The setting of the vertical shaft 3 and the horizontal shaft 7 improves the support of the rotating structure of the shaft mechanism. The connection of the first damping component and the second damping component reduces the probability of structural failure and improves the stability, reliability and durability of the shaft mechanism in motion scenarios.

[0063] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A rotating shaft mechanism, comprising a base, characterized in that: Hollow support tubes are paired and connected to the base. A vertical shaft is connected to the inside of the support tube through a connector. The vertical shaft is coaxially connected to the support tube and can rotate horizontally. One end of the vertical shaft passes through the support tube and extends outward to form a connecting part. A bent tube is connected to the connecting part. One end of the bent tube is paired and connected to the connecting part through a first mounting joint, so that the vertical shaft can drive the bent tube to rotate horizontally through the first mounting joint. The other end of the bent tube is connected to a horizontal shaft through a second mounting joint. A connecting bracket is paired and installed on the horizontal shaft through a mounting piece. A support part is formed on the connecting bracket, and a through hole is formed on the connecting bracket for the horizontal shaft to pass through, so that the connecting bracket can rotate up and down around the horizontal shaft through the mounting piece. The first mounting joint and the second mounting joint are respectively locked and installed at both ends of the bent tube.

2. The rotating shaft mechanism according to claim 1, characterized in that: The base is provided with a fixing hole, and the connector is installed in the fixing hole. One end of the vertical shaft extends through the support tube into the fixing hole and is coaxially connected with the connector. The end of the vertical shaft near the base is connected to a first damping component.

3. The rotating shaft mechanism according to claim 1, characterized in that: The connector is provided in at least two parts, and the connector is composed of ball bearings, with the two ball bearings respectively located at both ends of the vertical shaft.

4. The rotating shaft mechanism according to claim 1, characterized in that: The end of the support tube away from the base is connected to a locking block. The locking block has a locking hole for the support tube to pass through. The locking block has a locking part and a locking bolt. The end of the support tube is paired with the locking hole. The locking bolt is inserted into the locking part to lock the support tube, so that the locking hole clamps and locks the support tube.

5. The rotating shaft mechanism according to claim 4, characterized in that: The locking block is provided with a first limiting piece on the side near the bend, and a limiting protrusion is formed on the limiting piece. The end of the bend near the locking block is connected to a first rotating positioning piece, and a positioning opening is provided on the first rotating positioning piece, so that the rotation of the first rotating positioning piece is stopped and limited by the positioning opening and the limiting protrusion.

6. A rotating shaft mechanism according to any one of claims 1-5, characterized in that: The first mounting joint is provided with a first connecting hole for the connecting part to pass through, and the connecting part is fixedly connected to the first connecting hole, so that the bent pipe can be rotated horizontally through the vertical axis.

7. The rotating shaft mechanism according to claim 2, characterized in that: The mounting component is provided in at least two parts, and the mounting component is composed of needle roller bearings. The two needle roller bearings are paired and installed at both ends of the through hole of the connecting bracket.

8. The rotating shaft mechanism according to claim 7, characterized in that: One end of the horizontal axis is coaxially connected to the second mounting joint through the mounting part. The second mounting joint is provided with a second connecting hole for the mounting part to pass through. The mounting part is fixedly connected to the second connecting hole, so that the connecting bracket can rotate up and down around the horizontal axis through the needle roller bearing. One end of the vertical axis passes through the through hole and is connected to the second damping component.

9. The rotating shaft mechanism according to claim 8, characterized in that: The connecting bracket is connected to a second rotating positioning plate near the end of the bend, and a positioning protrusion is formed on the second rotating positioning plate. The end of the bend is connected to a second limiting plate, and a limiting opening is formed on the second limiting plate, so that the rotation of the second rotating positioning plate is stopped and limited by the positioning protrusion and the limiting opening.

10. The rotating shaft mechanism according to claim 7, characterized in that: The first damping assembly and the second damping assembly each include friction plates and multiple damping springs stacked in sequence, so that the ends of the vertical shaft and the horizontal shaft pass through the first damping assembly and the second damping assembly respectively and are locked and limited by the locking nut.

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