Locking structure, hydraulic lifting column movement and hydraulic lifting column

Abstract

The application relates to a locking structure, a hydraulic lifting column mechanism and a hydraulic lifting column, and belongs to the technical field of hydraulic machines. The application comprises a lifting core, a limiting guide sleeve and a rotating installation column. The lifting core, the limiting guide sleeve and the rotating installation column are located in hydraulic oil and are under certain hydraulic conditions. One end of the limiting guide sleeve is rotationally connected with the rotating installation column and is provided with a hydraulic rotating structure. The hydraulic rotating structure controls the rotation of the limiting guide sleeve under certain hydraulic conditions. The limiting guide sleeve is provided with a guide hole through which the lifting core vertically slides. One side of the limiting guide sleeve is provided with a locking surface. After the limiting guide sleeve rotates, the locking surface abuts against the lower end of the lifting core and limits the downward movement of the lifting core. The application has the effect of better locking in cooperation with a hydraulic system.

Description

Technical Field

[0001] This application relates to the field of hydraulic machinery, and in particular to a locking structure, a hydraulic lifting column mechanism, and a hydraulic lifting column. Background Technology

[0002] Hydraulic rising bollards are automatic lifting bollards powered by hydraulic motors. They can be divided into integrated hydraulic rising bollards and split hydraulic rising bollards. Their power unit is a hydraulic motor.

[0003] Hydraulic bollards typically consist of a housing and a mechanism housed within it. The mechanism is the primary hydraulic component, usually employing a hydraulic telescopic cylinder. The housing includes a base and a vertically sliding bollard mounted on the base. The mechanism drives the bollard to slide vertically, thus achieving raising and lowering. Hydraulic oil serves as the driving medium. There are two specific control methods: using an external hydraulic power unit or an internal hydraulic power unit, corresponding to split-type and integrated-type bollards, respectively.

[0004] The aforementioned hydraulic bollards primarily obstruct passage and generally have relatively low vertical support. Applying vertical pressure can often cause the hydraulic bollard to fail. The bollard's raised state is mainly locked by the hydraulic pressure of the hydraulic oil. This is especially true for integrated bollards, where the power unit is integrated within the hydraulic bollard, resulting in limited hydraulic pressure and a generally poor locking effect. On the other hand, using an external hydraulic power unit requires a larger size to maintain a higher hydraulic lifting force, which places higher demands on the installation space and wiring layout during installation.

[0005] The aforementioned hydraulic lifting bollard requires an additional locking structure to maintain the bollard's raised position, preventing it from being damaged by vertical pressure. Summary of the Invention

[0006] Firstly, in order to better lock the lifting column, this application provides a locking structure.

[0007] The locking structure provided in this application adopts the following technical solution:

[0008] A locking structure includes a lifting core, a limiting guide sleeve, and a rotating mounting column. The lifting core, the limiting guide sleeve, and the rotating mounting column are all located in hydraulic oil and are under a certain hydraulic pressure. One end of the limiting guide sleeve is rotatably connected to the rotating mounting column and is provided with a hydraulic rotating structure. The hydraulic rotating structure controls the rotation of the limiting guide sleeve under a certain hydraulic pressure. The limiting guide sleeve is provided with a guide hole through which the lifting core slides vertically. A locking surface is provided on one side of the limiting guide sleeve. After the limiting guide sleeve rotates, the locking surface abuts against the lower end of the lifting core and restricts the downward movement of the lifting core.

[0009] By adopting the above technical solution, through a hydraulically controlled rotating structure, when the lifting core moves out of the guide hole, the rotation of the limiting guide sleeve causes the locking surface of the limiting guide sleeve to face the lifting core. The limiting guide sleeve restricts the downward movement of the lifting core, thereby achieving the locking effect of the lifting core. In this process, if the vertical movement of the lifting core is achieved by hydraulic drive, and the hydraulic rotating structure is also controlled by hydraulics, then no additional control structure is needed, and the locking process is more in line with the usage conditions. In particular, by design, when the lifting core is subjected to vertical force, the hydraulic oil is squeezed, causing the oil pressure to rise, and then the rotation locking process of the limiting guide sleeve is achieved. Thus, during normal use, locking is not required. When locking is required by force, if the oil pressure exceeds the limit, the locking process is initiated, which also plays a role in limiting the oil pressure and maintaining the safety of the hydraulic system of the corresponding equipment. At the same time, when the guide hole of the limiting guide sleeve is not locked, the sliding process of the lifting core plays a sliding guiding role.

[0010] Optionally, the hydraulic rotation structure includes a telescopic airbag cavity, the limiting guide sleeve has a rotation hole for inserting the rotating mounting post, the rotating mounting post is cylindrical, the rotation hole is a circular hole that rotatably engages with the rotating mounting post, a compression protrusion is provided at the end of the rotating mounting post, the limiting guide sleeve has a hollow cavity, the hollow cavity has a first partition plate and a second partition plate, the telescopic airbag cavity is located between the first partition plate and the second partition plate, the rotation hole is located on the side of the first partition plate away from the second partition plate, and the cavity on the side of the second partition plate away from the first partition plate is a hydraulic chamber and is connected to an external hydraulic system. The first partition plate has a compression slot for the compression protrusion to enter the space between the first partition plate and the second partition plate. The second partition plate has a pressure slot that connects to the oil pressure chamber. The rotating mounting column has a smaller diameter rotating core protruding coaxially. The rotating core is integral with the compression protrusion. A circumferential partition plate is provided between the first partition plate and the second partition plate. The pressure slot is located between the circumferential partition plate and the compression protrusion. The compression protrusion, the circumferential partition plate, the first partition plate, the second partition plate, and the cavity wall between the first partition plate and the second partition plate form the telescopic airbag cavity.

[0011] By adopting the above technical solution, the hydraulic chamber is connected to external hydraulic oil, thus maintaining direct sensing of the hydraulic oil pressure within the cavity of the limiting guide sleeve. The space between the first and second partition plates is divided into two parts by a compression convex plate on the rotating mounting column. One part connects to the hydraulic chamber through a pressure slot, while the other part forms an independent telescopic air bladder cavity. When the oil pressure rises, a pressure difference is generated inside and outside the telescopic air bladder cavity, causing the compression convex plate to move under this pressure difference, thereby achieving the rotation of the limiting guide sleeve. The telescopic air bladder cavity is compressed, ultimately realizing the function of the hydraulic rotation structure. This setup eliminates the need for a separate drive structure during rotation. By changing the connecting structure and using pressure difference, the rotation process is achieved. The structure is simple and effective, without complicating or increasing the size of the equipment. It only requires more precise machining, reducing overall costs and without increasing installation difficulty.

[0012] Optionally, the cavity wall of the telescopic airbag is provided with a rubber layer.

[0013] By adopting the above technical solution, a rubber layer is set on the cavity wall of the telescopic airbag, making it less susceptible to oil seepage. Compared to setting a rubber layer on the outside of the telescopic airbag cavity at the location and gaps in contact with hydraulic oil, it is less susceptible to oil corrosion. At the same time, compared to using high-precision machining processes to ensure the sliding contact state between the compression convex plate and the first and second partition plates to achieve oil sealing, the rubber sealing method is more cost-effective. Depending on production needs, high-precision, high-cost, and longer-lasting products can be selected, or low-cost products can be selected, each with its own advantages and disadvantages.

[0014] Optionally, the compression protrusion is directly connected only to the rotating core, and the side wall of the compression protrusion facing the rotating mounting column slides and abuts against the first partition plate.

[0015] By adopting the above technical solution, the sealing performance between the compression convex plate and the first partition plate is improved, and the sealing performance of the telescopic airbag cavity is also improved accordingly. At the same time, since the compression convex plate is installed between the first partition plate and the second partition plate, the first partition plate restricts the compression convex plate. Therefore, the compression convex plate not only plays the role of rotating and compressing the telescopic airbag cavity, but also plays the role of locking the connection between the limiting guide sleeve and the rotating mounting column, thus maintaining the stability of the connection.

[0016] Optionally, the compression protrusion is directly connected to both the rotating core and the rotating mounting column. The compression slot is fan-shaped, and the compression protrusion rotates within the compression slot. When the compression protrusion abuts against the first partition plate, the locking surface faces the lifting core.

[0017] By adopting the above technical solution, the connection strength between the compression convex plate and the rotating mounting column is higher, the compression convex plate is not easily deformed during the rotation of the limiting guide sleeve, and at the same time, due to the mutual restriction between the compression groove and the compression convex plate, there is a rotation stroke limitation, so that the limiting guide sleeve is not easy to over-rotate due to excessive hydraulic oil pressure during rotation, thus better ensuring the locking and limiting effect of the limiting guide sleeve on the lifting core.

[0018] Secondly, this application provides a hydraulic lifting column mechanism, which adopts the following technical solution:

[0019] A hydraulic lifting column mechanism includes a mechanism housing, a lifting core, and any locking structure as described in claims 1-5. The rotating mounting column is disposed on the inner wall of the mechanism housing, and a fixing column is also installed on the inner wall of the mechanism housing. The fixing column corresponds to the rotating mounting column. The limiting guide sleeve has a fixing hole for the fixing column to be rotatably inserted. The mechanism housing has a through insertion hole for the fixing column to be interference-fitted. The mechanism housing is filled with hydraulic oil, and the mechanism housing is provided with hydraulic oil inlet and outlet pipes for the hydraulic oil to enter and exit. One end of the lifting core is located inside the mechanism housing, and the other end slides out of the mechanism housing.

[0020] By adopting the above technical solution, the fixed column inside the mechanism housing, together with the rotating mounting column, better fixes the limiting guide sleeve, so that the limiting guide sleeve can remain stable when the lifting core moves vertically. The fixed column adopts an interference fit, which makes it easy to install and fix the limiting guide sleeve. Hydraulic oil is injected into the mechanism housing through the hydraulic oil inlet and outlet pipes, and then the lifting core is driven to move out of the mechanism housing, realizing the telescopic function of the lifting column mechanism. When the lifting core moves upward, the limiting guide sleeve mainly plays a guiding role. When the lifting core is separated from the limiting guide sleeve, the lifting core moves upward to the limit of its stroke, and the hydraulic oil pressure rises, or when the lifting core is subjected to force and moves downward, causing the oil pressure to rise, the limiting guide sleeve rotates and locks the lifting core to limit its downward movement.

[0021] Optionally, it also includes a valve, wherein the valve is divided into an upper cavity and a lower cavity inside the core housing, the limiting guide sleeve is located in the lower cavity, the lifting core is fixed to the valve, and one end of the lifting core passes through the valve and is located in the lower cavity to cooperate with the limiting guide sleeve. There are two hydraulic oil inlet and outlet pipes, which are connected to the upper cavity and the lower cavity respectively.

[0022] By adopting the above technical solution, the internal structure of the mechanism is divided into an upper chamber and a lower chamber by a valve, which makes the extension and retraction process of the lifting core better controlled. Compared with the hydraulic oil suction method to achieve the extension and retraction of the lifting core, the simultaneous entry and exit of hydraulic oil in the upper and lower chambers can better control the speed of extension and retraction of the lifting core and the oil pressure of the hydraulic oil. The lifting core passes through the valve and cooperates with the limit guide sleeve, which maintains the normal function of the locking function. The lifting core also limits the downward stroke of the valve, better maintaining the position of the valve during use, so that the locking structure can be adapted and used in different situations of the lifting core.

[0023] Optionally, there are multiple limiting guide sleeves, which are spaced apart along the sliding direction of the lifting core. The hydraulic chamber has an equal pressure hole on the wall of the guide hole that connects to the internal cavity of the mechanism housing.

[0024] By adopting the above technical solution, the limiting guide sleeve is in multiple forms, which allows the lifting core to be locked in multiple stages. When the lifting core extends to different lengths, it can be locked at a certain extension length, realizing stepped locking. With the equal pressure hole opened on the wall of the guide hole, the hydraulic chamber inside the limiting guide sleeve is in a stable state when the lifting core is not pulled out of the guide hole, and no rotational force is generated in the limiting guide sleeve. Only when the lifting core is disengaged and the limiting guide sleeve can rotate normally will the locking structure take effect, so that the limiting guide sleeve will not affect the extension and retraction process of the lifting core, and multiple limiting guide sleeves can also take effect sequentially without affecting each other.

[0025] Optionally, the hydraulic chamber is connected to the fixing hole, the fixing column is hollow inside, and the hydraulic oil inlet and outlet pipes are connected and fixed to the fixing column.

[0026] By adopting the above technical solution, the installation process of hydraulic oil inlet and outlet pipes can be carried out simultaneously with the installation process of limit guide sleeve, without adding extra holes to the core shell. By utilizing the original installation structure, different structure setting processes can be realized, and the installation structure can be simplified while adding a locking structure, thus achieving structural composite.

[0027] Thirdly, this application provides a hydraulic lifting column, which adopts the following technical solution:

[0028] A hydraulic lifting column includes a housing and the aforementioned hydraulic lifting mechanism installed within the housing. The housing includes a base and a lifting column. The base has a sliding cavity for mounting the hydraulic lifting mechanism. The sliding cavity has an opening in the top wall of the base for sliding mounting of the lifting column. The top of the lifting core of the hydraulic lifting mechanism is fixed to the lifting column.

[0029] By adopting the above technical solution, the hydraulic power requirements of the hydraulic lifting column power unit can be reduced. The locking structure restricts the downward movement of the lifting column, reducing the hydraulic support requirements. The hydraulic lifting column mainly plays a role in horizontal restriction, while vertical compression is supported without increasing the system hydraulic pressure. The safe hydraulic pressure value can be lower, and the overall equipment requirements are reduced, thus lowering the process and material costs.

[0030] In summary, through a hydraulically controlled rotating structure, after the lifting core moves out of the guide hole, the rotation of the limiting guide sleeve causes the locking surface of the limiting guide sleeve to face the lifting core. The limiting guide sleeve restricts the downward movement of the lifting core, thereby achieving a locking effect on the lifting core. If the vertical movement of the lifting core is achieved by hydraulic drive, and the hydraulic rotating structure is also controlled by hydraulics, then no additional control structure is needed, and the locking process is more in line with the usage conditions. In particular, by design, when the lifting core is subjected to vertical force, the hydraulic oil is squeezed, causing the oil pressure to rise, and then the rotation locking process of the limiting guide sleeve is achieved. Thus, during normal use, locking is not required. When locking is required by force, if the oil pressure exceeds the limit, the locking process is initiated, which also serves to limit the oil pressure and maintain the safety of the hydraulic system of the corresponding equipment. At the same time, when the guide hole of the limiting guide sleeve is not locked, the sliding process of the lifting core plays a sliding guiding role. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the hydraulic lifting column in the embodiments of this application;

[0032] Figure 2 This is a cross-sectional view of the hydraulic lifting column in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram of the structure of the limiting guide sleeve in the embodiments of this application;

[0034] Figure 4 This is a cross-sectional view of the limiting guide sleeve in the embodiments of this application;

[0035] Figure 5 This is a partial structural diagram of one end of the limiting guide sleeve in an embodiment of this application;

[0036] Figure 6 This is a partial structural diagram of the limiting guide sleeve after being cut in the embodiment of this application;

[0037] Figure 7 This is a schematic diagram of a rotating mounting column in an embodiment of this application;

[0038] Figure 8 This is another structural schematic diagram of the rotating mounting column in the embodiments of this application;

[0039] Figure 9 This is a schematic diagram of the second embodiment of the limiting guide sleeve in this application.

[0040] Figure 10 This is a schematic diagram of the third embodiment of the limiting guide sleeve in this application.

[0041] Figure 11 This is a cross-sectional view of the second embodiment of the lifting core in this application.

[0042] Figure 12 This is a cross-sectional view of another embodiment of the limiting guide sleeve in this application.

[0043] Explanation of reference numerals in the attached drawings: 1. Outer shell; 11. Base; 12. Lifting column; 13. Sliding cavity; 14. Annular protrusion; 2. Hydraulic lifting mechanism; 21. Mechanism shell; 211. Upper cavity; 212. Lower cavity; 213. Insertion hole; 22. Lifting core; 23. Limiting guide sleeve; 231. Guide hole; 232. Rotating hole; 233. Fixing hole; 234. Locking surface; 235. First partition plate; 236. Second partition plate; 237. Compression groove; 238. Pressure groove; 239. Isobaric hole; 24. Valve; 25. Fixing column; 26. Rotating mounting column; 261. Compression protrusion; 2611. Pressure guide groove; 262. Rotating core; 3. Hydraulic power unit; 4. Threaded sleeve; 5. Telescopic airbag cavity; 6. Hydraulic chamber; 7. Hydraulic oil inlet / outlet pipe; 8. Connecting pipe head; 9. Circumferential partition plate. Implementation

[0044] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0045] This application discloses a hydraulic lifting column.

[0046] Reference Figure 1 and Figure 2A hydraulic lifting column includes a housing 1, a hydraulic lifting mechanism 2 installed inside the housing 1, and a hydraulic power unit 3 that powers the hydraulic lifting mechanism 2. The hydraulic power unit 3 can be installed together with the hydraulic lifting mechanism 2 inside the housing 1, or it can be arranged separately. The hydraulic power unit 3 is connected to the hydraulic lifting mechanism 2 inside the housing 1 through an oil circuit. The housing 1 includes a base 11 and a lifting column 12. The base 11 has a sliding cavity 13 for installing the hydraulic lifting mechanism 2. The sliding cavity 13 has an opening in the top wall of the base 11 for the lifting column 12 to slide and install. In this embodiment, the base 11 is square, and the lifting column 12 is cylindrical. One end of the opening of the lifting column 12 is located inside the base 11. The hydraulic lifting mechanism 2 is fixed to the top wall of the lifting column 12, so that the hydraulic lifting mechanism 2 can drive the lifting column 12 to slide vertically in and out of the base 11 relative to the base 11. During installation, the base 11 is buried underground.

[0047] When the hydraulic power unit 3 is independent of the base 11, the lifting column 12 is located in the middle of the base 11 and is coaxial with the base 11. When the hydraulic power unit 3 is located inside the base 11, the hydraulic power unit 3 and the hydraulic lifting mechanism 2 are assembled together. The hydraulic power unit 3 can be installed below the hydraulic lifting mechanism 2, making the base 11 relatively longer but with a smaller cross-section. At this time, the lifting column 12 is still located in the middle of the base 11 and is coaxial with the base 11. The hydraulic power unit 3 can also be located on the side of the hydraulic lifting mechanism 2. At this time, in order to reduce the cross-sectional area of ​​the base 11, the hydraulic lifting mechanism 2 is placed eccentrically inside the base 11. Correspondingly, the lifting column 12 and the base 11 are also placed eccentrically.

[0048] In this embodiment, the hydraulic power unit 3 is externally mounted.

[0049] The hydraulic lifting mechanism 2 includes a mechanism shell 21, a lifting core 22, a limiting guide sleeve 23, a valve 24, a fixed column 25, and a rotating mounting column 26. The mechanism shell 21 is also cylindrical, and its diameter is smaller than the inner diameter of the lifting column 12, allowing the mechanism shell 21 to be inserted into the lifting column 12. The mechanism shell 21 is hollow inside, and the valve 24 is slidably installed inside the mechanism shell 21. The internal cavity of the mechanism shell 21 is divided into an upper cavity 211 and a lower cavity 212. One end of the lifting core 22 is located in the lower cavity 212, and the other end passes through the upper cavity 211 and slides coaxially through the mechanism shell 21. The end away from the lower cavity 212 is located outside the mechanism shell 21. The lifting core 22 is located outside the mechanism shell 21 and is engaged with the lifting column 12. The extension and retraction of the lifting core 22 pushes the lifting column 12 to slide in and out of the base 11. During installation, the mechanism shell 21 is located inside the base 11 and is coaxial with the lifting column 12. The top of the lifting core 22 abuts against the inner top wall of the lifting column 12. In order to maintain stability, the mechanism shell 21 can be fixed inside the base 11. Specifically, an annular protrusion 14 can be set inside the base 11 for the mechanism shell 21 to be inserted, or an annular protrusion 14 can be set on the inner top wall of the lifting column 12 for the lifting core 22 to be inserted, or both annular protrusions 14 can be set and further glued for fixation.

[0050] Meanwhile, the aforementioned lifting core 22 can also be divided into two parts, with valves 24 installed at the top and bottom respectively, and fixed to valves 24 to improve the isolation between the upper cavity 211 and the lower cavity 212. Alternatively, the lifting core 22 can pass directly through the valve 24, but the lifting core 22 is a stepped column. The end of the lifting core 22 with a smaller diameter passes through the valve 24 and enters the lower cavity 212, while the stepped surface of the lifting core 22 abuts against the valve 24. At the same time, the end of the lifting core 22 with a smaller diameter is screwed into a threaded sleeve 4 to abut against the valve 24. This fixes the valve 24 and the lifting core 22, and also improves the sealing between the lifting core 22 and the valve 24.

[0051] Reference Figure 2 and Figure 3The limiting guide sleeve 23 is always located within the lower cavity 212. After the lifting core 22 is reduced in size, it better fits the limiting guide sleeve 23. The diameter of the mechanism shell 21 does not need to be too large to complete the cooperation between the limiting guide sleeve 23 and the lifting core 22. This facilitates the installation of the limiting guide sleeve 23 and also completes the fixation of the valve 24, without affecting the size fit between the lifting column 12 and the mechanism shell 21. The rotating mounting column 26 and the fixing column 25 are set on the inner wall of the mechanism shell 21 to fix the limiting guide sleeve 23. Specifically, the limiting guide sleeve 23 has a guide hole 231 in the middle for the lifting core 22 to pass through, and one end of the limiting guide sleeve 23... The device has a rotating hole 232 that mates with the rotating mounting post 26, and a fixing hole 233 at the other end for the fixing post 25 to be inserted for rotational engagement. In this embodiment, the limiting guide sleeve 23 is cylindrical at both ends and in the middle. The axis of the cylinder in the middle of the limiting guide sleeve 23 is perpendicular to the axes of both ends. The two ends of the limiting guide sleeve 23 are coaxial and have the same diameter. The diameter of the middle of the limiting guide sleeve 23 is larger than that of both ends. At the same time, the middle of the limiting guide sleeve 23 is connected to both ends by an arc. The outer wall of the middle of the limiting guide sleeve 23 is also spherical. The surface on one side of the middle of the limiting guide sleeve 23 is designated as the locking surface 234.

[0052] A hydraulic rotation structure is provided at the position where the limiting guide sleeve 23 is rotatably connected to the rotating mounting column 26. The limiting guide sleeve 23 is rotated under a certain hydraulic pressure through the hydraulic rotation structure, so that the locking surface 234 of the limiting guide sleeve 23 faces upward. Since the locking surface 234 is spherical, when the limiting guide sleeve 23 contacts the lifting core 22, if it is not in the locked state, it will be pushed to the state where the lifting core 22 passes through the guide hole 231, and it is not easy to get stuck due to damage to the hydraulic rotation structure.

[0053] Reference Figures 3-7The specific hydraulic rotation structure includes a telescopic airbag cavity 5, a hollow cavity within the limiting guide sleeve 23, a first partition plate 235 and a second partition plate 236 within the hollow cavity, the telescopic airbag cavity 5 being located between the first partition plate 235 and the second partition plate 236, a rotation hole 232 located on the side of the first partition plate 235 away from the second partition plate 236, a cylindrical rotating mounting post 26, and a circular hole 232 that rotatably engages with the rotating mounting post 26. The first partition plate 235 and the second partition plate 236 are both located inside the end of the limiting guide sleeve 23 that engages with the rotating mounting post 26. The hollow cavity on the side of the second partition plate 236 away from the first partition plate 235 is designated as a hydraulic chamber 6 and connected to the hydraulic oil in the lower chamber 212. A compression protrusion 261 protrudes from the end of the rotating mounting post 26, and the first partition plate 235 has an opening for the compression protrusion 261 to enter. A compression slot 237 is provided in the space between the first partition plate 235 and the second partition plate 236. The second partition plate 236 has a pressure slot 238 that connects to the hydraulic chamber 6. A rotating core 262 with a smaller diameter is coaxially protruding from the rotating mounting column 26. The rotating core 262 is integrated with the compression protrusion 261. A circumferential partition plate 9 is provided between the first partition plate 235 and the second partition plate 236. Both the compression slot 237 and the pressure slot 238 are opened to the position of the circumferential partition plate 9. At the same time, the thickness of the compression protrusion 261 is greater than the width of the compression slot 237. The circumferential partition plate 9 and the rotating core 262 abut against each other. The pressure slot 238 is located between the circumferential partition plate 9 and the compression protrusion 261. The compression protrusion 261, the circumferential partition plate 9, the first partition plate 235, the second partition plate 236, and the cavity wall between the first partition plate 235 and the second partition plate 236 form a telescopic airbag cavity 5.

[0054] Meanwhile, the hollow cavity extends throughout the interior of the limiting guide sleeve 23, making the limiting guide sleeve 23 a shell, and the fixing hole 233 is also connected to the hydraulic cavity accordingly. The core shell 21 has a through insertion hole 213 for the fixing post 25 to be inserted with interference fit. During installation, the limiting guide sleeve 23 is inserted into the rotating mounting post 26, and then the fixing post 25 is driven in from the outside of the core shell 21. Then the fixing post 25 can be further welded to improve the connection strength and sealing.

[0055] Refer to Figure 5 and Figure 7The compression protrusion 261 can be directly connected to the rotating core 262. In this case, there is a certain gap between the compression protrusion 261 and the rotating mounting column 26. After the compression protrusion 261 is installed into the space between the first partition plate 235 and the second partition plate 236, the side wall of the compression protrusion 261 facing the rotating mounting column 26 slides and abuts against the first partition plate 235. At the same time, a pressure guiding groove 2611 is opened on the side wall of the compression protrusion 261 facing the circumferential partition plate 9 to connect the hydraulic chamber 6, thereby better guiding the hydraulic pressure to drive the compression protrusion 261. The pressure guiding groove 2611 can reduce the thickness of the part of the compression protrusion 261 near the compression groove 237 and form a gap between it and the circumferential partition plate 9.

[0056] Reference Figure 8 and Figure 9 The compression protrusion 261 can also be directly connected to the rotating core 262 and the rotating mounting column 26. At this time, the compression slot 237 is fan-shaped, and the compression protrusion 261 rotates in the compression slot 237 with a rotation angle of 90 degrees. When the compression protrusion 261 abuts against the first partition plate 235, the locking surface 234 faces the lifting core 22. When the compression protrusion 261 abuts against the circumferential partition plate 9, the guide hole 231 is coaxial with the lifting core 22.

[0057] Reference Figure 10 The circumferential partition plate 9 can also be composed of a vertical plate and a fan-shaped plate, which is suitable for the two situations of the compression protrusion plate 261. It is matched with the compression protrusion plate 261 in a way that it is only connected to the rotating core 262, which improves the sealing performance and also plays a role in limiting the stroke.

[0058] In this application, the compression protrusion 261 is preferably directly connected to the rotating core 262 and the rotating mounting column 26.

[0059] Meanwhile, based on the product's usage environment and cost requirements, it is preferable to use high-precision machining for the rotating mounting column 26 and the limiting guide sleeve 23 to achieve high-precision fit. Alternatively, a rubber layer can be provided on the cavity wall of the telescopic airbag cavity 5 to reduce the production precision requirements. The rubber layer can be provided on the outer area of ​​the telescopic airbag cavity 5 that is in contact with hydraulic oil, i.e., the position where the side wall of the compression convex plate 261 faces the circumferential partition plate 9 and abuts against other components, as well as the outer part of the rotating core 262 or the part where the circumferential partition plate 9 abuts against the rotating core 262. Alternatively, it can be provided on the position where the side wall of the compression convex plate 261 faces away from the circumferential partition plate 9 and abuts against other components, without directly contacting the hydraulic oil. Alternatively, the rubber layer can be provided in all areas where the compression convex plate 261 abuts against other components, as well as at the positions where the first partition plate 235, the second partition plate 236, the circumferential partition plate 9, and the rotating core 262 contact each other.

[0060] Reference Figure 3 and Figure 4The hydraulic chamber 6 can be connected to the lower chamber 212 by opening an equal pressure hole 239 on the upper part of the guide hole 231 to connect the lower chamber 212 and the hydraulic chamber. This allows the hydraulic rotation structure to take effect when the lifting core 22 is disengaged from the limit guide sleeve 23. When the lifting core 22 descends, the lower chamber 212 returns oil, and there will be no external oil pressure to drive the hydraulic rotation structure, thus not affecting the downward movement and reset of the lifting core 22.

[0061] At this time, multiple limit guide sleeves 23 can be set at intervals along the axis of the core housing 21. When all limit guide sleeves 23 are rotated to the locking surface 234 facing the lifting core 22, the upper and lower limit guide sleeves 23 abut against each other, thereby dispersing the abutting force when pressed and better locking the lifting core 22.

[0062] Meanwhile, a hydraulic rotation structure can also be formed between the aforementioned fixed column 25 and the limiting guide sleeve 23. At this time, the end of the fixed column 25 is provided with a compression protrusion 261 and a rotating core 262, while the fixed hole 233 and the hydraulic chamber 6 are respectively provided with a first partition plate 235, a second partition plate 236 and a circumferential partition plate 9.

[0063] The various structures forming the hydraulic rotation structure can also be interchanged between the rotating mounting post 26 and the limiting guide sleeve 23. In this case, the diameter of the rotating mounting post 26 is larger than the diameter of the end of the limiting guide sleeve 23. The rotating hole 232 is opened in the rotating mounting post 26. At this time, the equal pressure hole 239 is also opened in the rotating mounting post 26. Meanwhile, the hydraulic chamber 6 is always connected to the lower chamber 212. Therefore, it is preferable to set the compression protrusion 261 in the rotating mounting post 26. Similarly, the hydraulic rotation structure between the fixed post 25 and the limiting guide sleeve 23 can also be interchanged.

[0064] Reference Figure 2 and Figure 11The mechanism housing 21 is equipped with hydraulic oil inlet and outlet pipes 7 for hydraulic oil to enter and exit. There are two hydraulic oil inlet and outlet pipes 7, which are connected one-to-one to the upper cavity 211 and the lower cavity 212 respectively. The end of the hydraulic oil inlet and outlet pipe 7 located outside the mechanism housing 21 is set downward. The bottom of the base 11 is provided with a connecting pipe head 8. The hydraulic oil inlet and outlet pipe 7 and the connecting pipe head 8 are connected by an oil pipe. The oil pipe extends downward along the mechanism housing 21, so as not to affect the vertical movement of the lifting column 12. The hydraulic oil inlet and outlet pipe 7 connected to the lower cavity 212 can be combined with the fixed column 25. The fixed column 25 is hollow inside, and the hydraulic oil inlet and outlet pipe 7 The hydraulic oil inlet / outlet pipe 7 is installed simultaneously with the fixed column 25, so that the hydraulic oil inlet / outlet pipe 7 is installed at the same time. At this time, the hydraulic chamber 6 is connected to the lower chamber 212 by opening an equal pressure hole 239 on the outer wall of the limit guide sleeve 23, so that the hydraulic chamber 6 is always connected to the lower chamber 212. The equal pressure hole 239 also serves as a channel for oil flow. When using this scheme, it is preferable not to set the valve 24 in the core housing 21, and only one hydraulic oil inlet / outlet pipe is set. The extension and retraction of the lifting core 22 is controlled by the inlet and outlet of the hydraulic oil, ensuring that the hydraulic oil is under negative pressure when the lifting core 22 descends.

[0065] During assembly, the side plate of the base 11 with the connecting pipe head 8 is finally assembled or welded to the other parts of the base 11. Before completing the installation, the connection between the hydraulic oil pipe and the connecting pipe head 8 is completed first.

[0066] Reference Figure 12 Meanwhile, in the above-mentioned combination of fixed column 25 and hydraulic oil inlet / outlet pipe 7, the cavity inside the limiting guide sleeve 23 can also be divided into two unrelated parts. The equal pressure hole 239 is still opened on the hole wall of guide hole 231 and communicates with oil pressure cavity 6, while the fixed hole 233 is directly connected to the lower cavity 212 and no longer communicates with oil pressure cavity 6, so they do not affect each other.

[0067] Preferably, the hydraulic rotation structure is only disposed between the rotating mounting column 26 and the limiting guide sleeve 23, the fixed column 25 is combined with the hydraulic oil inlet and outlet pipe 7, and the fixed hole 233 is not directly connected to the oil pressure chamber 6.

[0068] The implementation principle of a hydraulic lifting column according to an embodiment of this application is as follows: hydraulic oil flows out of the upper chamber 211 and hydraulic oil is injected into the lower chamber 212 through the hydraulic power unit 3, causing the valve 24 to move upward, driving the lifting core 22 to move upward. The lifting core 22 disengages from the limiting guide sleeve 23. The oil pressure chamber 6 is connected to the lower chamber 212 through the equal pressure hole 239. At this time, the limiting guide sleeve 23 rotates so that the locking surface 234 abuts against the lifting core 22. Alternatively, when the limiting guide sleeve 23 is subjected to a vertical external force, the hydraulic pressure rises, and the limiting guide sleeve 23 rotates until the lifting core 22 abuts against the limiting guide sleeve 23, thereby locking the lifting core 22 and keeping the hydraulic pressure unloaded and continuously rising. When the lower chamber 212 returns oil, the oil pressure is restored, the limiting guide sleeve 23 is reset, and the lifting core 22 moves downward and slides again through the guide hole 231.

[0069] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A locking structure, characterized in that: The device includes a lifting core (22), a limiting guide sleeve (23), and a rotating mounting column (26). The lifting core (22), the limiting guide sleeve (23), and the rotating mounting column (26) are all located in hydraulic oil and are under a certain hydraulic pressure. One end of the limiting guide sleeve (23) is rotatably connected to the rotating mounting column (26) and is provided with a hydraulic rotating structure. The hydraulic rotating structure controls the rotation of the limiting guide sleeve (23) under a certain hydraulic pressure. The limiting guide sleeve (23) is provided with a guide hole (231) through which the lifting core (22) slides vertically. A locking surface (234) is provided on one side of the limiting guide sleeve (23). After the limiting guide sleeve (23) rotates, the locking surface (234) abuts against the lower end of the lifting core (22) and restricts the lifting core (22) from moving downward. The hydraulic rotating structure includes a telescopic airbag cavity (5). The limiting guide sleeve (23) has a rotating hole (232) for the insertion of the rotating mounting post (26). The rotating mounting post (26) is cylindrical, and the rotating hole (232) is a circular hole that rotates with the rotating mounting post (26). A compression protrusion (261) is provided at the end of the rotating mounting post (26). A hollow cavity is provided inside the limiting guide sleeve (23). A first partition plate (235) and a second partition plate (236) are provided inside the hollow cavity. The telescopic airbag cavity (5) is located between the first partition plate (235) and the second partition plate (236). The rotating hole (232) is located on the side of the first partition plate (235) away from the second partition plate (236). The cavity on the side of the second partition plate (236) away from the first partition plate (235) is set as a hydraulic chamber (6) and is connected to external hydraulic oil. The first partition plate (235) 5) A compression slot (237) is provided for the compression protrusion (261) to enter the space between the first partition plate (235) and the second partition plate (236). The second partition plate (236) is provided with a pressure slot (238) that connects to the hydraulic chamber (6). The rotating mounting column (26) is coaxially provided with a rotating core (262) with a smaller diameter. The rotating core (262) is integral with the compression protrusion (261). A circumferential partition plate (9) is provided between the first partition plate (235) and the second partition plate (236). The pressure slot (238) is located between the circumferential partition plate (9) and the compression protrusion (261). The compression protrusion (261), the circumferential partition plate (9), the first partition plate (235), the second partition plate (236), and the cavity wall between the first partition plate (235) and the second partition plate (236) form the telescopic airbag cavity (5).

2. The locking structure according to claim 1, characterized in that: The wall of the telescopic airbag cavity (5) is provided with a rubber layer.

3. The locking structure according to claim 1, characterized in that: The compression protrusion (261) is directly connected to the rotating core (262), and the compression protrusion (261) slides and abuts against the first partition plate (235) on the side wall of the rotating mounting column (26).

4. The locking structure according to claim 1, characterized in that: The compression protrusion (261) is directly connected to the rotating core (262) and the rotating mounting column (26). The compression slot (237) is fan-shaped. The compression protrusion (261) rotates within the compression slot (237). When the compression protrusion (261) abuts against the first partition plate (235), the locking surface (234) faces the lifting core (22).

5. A hydraulic lifting column mechanism, characterized in that: The device includes a core housing (21), a lifting core (22), and a locking structure as described in any one of claims 1-4. The rotating mounting post (26) is disposed on the inner wall of the core housing (21). A fixing post (25) is also installed on the inner wall of the core housing (21). The fixing post (25) corresponds to the rotating mounting post (26). The limiting guide sleeve (23) has a fixing hole (233) for the fixing post (25) to be rotatably inserted. The core housing (21) has a through insertion hole (213) for the fixing post (25) to be interference-fitted. The core housing (21) is filled with hydraulic oil, and the core housing (21) is provided with a hydraulic oil inlet and outlet pipe (7) for the hydraulic oil to enter and exit. One end of the lifting core (22) is located inside the core housing (21), and the other end slides out of the core housing (21).

6. A hydraulic lifting column mechanism according to claim 5, characterized in that: It also includes a valve (24), which is divided into an upper cavity (211) and a lower cavity (212) inside the core housing (21). The limiting guide sleeve (23) is located in the lower cavity (212). The lifting core (22) is fixed to the valve (24), and one end of the lifting core (22) passes through the valve (24) and is located in the lower cavity (212) to cooperate with the limiting guide sleeve (23). There are two hydraulic oil inlet and outlet pipes (7), which are connected to the upper cavity (211) and the lower cavity (212) respectively.

7. A hydraulic lifting column mechanism according to claim 5, characterized in that: There are multiple limiting guide sleeves (23), and the multiple limiting guide sleeves (23) are spaced apart along the sliding direction of the lifting core (22). The hydraulic chamber (6) has an equal pressure hole (239) on the hole wall of the guide hole (231) to connect to the internal cavity of the core shell (21).

8. A hydraulic lifting column mechanism according to claim 5, characterized in that: The hydraulic chamber (6) is connected to the fixing hole (233), the fixing column (25) is hollow inside, and the hydraulic oil inlet and outlet pipe (7) is connected and fixed to the fixing column (25).

9. A hydraulic lifting column, characterized in that: The hydraulic lifting column mechanism according to any one of claims 5-8, comprising a housing (1) and a lifting column (12) installed within the housing (1), wherein the housing (1) comprises a base (11) and a lifting column (12), wherein the base (11) has a sliding cavity (13) for mounting the hydraulic lifting column mechanism (2), wherein the sliding cavity (13) has an opening in the top wall of the base (11) for sliding mounting of the lifting column (12), and the top of the lifting core (22) of the hydraulic lifting column mechanism (2) is fixed to the lifting column (12).

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