A self-locking lifting platform and its production line

Abstract

The present invention provides a self-locking lifting table and its production line, belonging to the field of mechanical technology. A self-locking lifting table includes: a base, a lifting table, and a scissor assembly connecting the two. The scissor assembly includes two sets of scissor members arranged oppositely and a drive shaft group. The drive shaft group is connected to the intersection point of the two scissor members; the scissor assembly has a first rod group that slides relative to the base, a first end pivotally connected to the base, a second rod group that slides relative to the lifting table, and a second end pivotally connected to the lifting table; a one-way self-locking assembly is provided on the first rod group; the one-way self-locking assembly includes a first rack rotatably connected to the first rod group and a second rack fixed to the base. The present invention has the advantages of not setting a separate hydraulic drive device, reducing costs, and being able to self-lock.

Description

Technical Field

[0001] The present invention belongs to the technical field of machinery, and particularly relates to a self-locking lifting platform and its production line. Background Art

[0002] A lifting platform is a device for vertical transportation in logistics systems such as factories and automated warehouses, and is also used for vertically transporting workpieces. It usually adopts hydraulic drive. However, under normal configuration, each lifting platform is equipped with a hydraulic drive mechanism, which results in a large number of hydraulic drive mechanisms, and thus the equipment cost and maintenance cost are relatively high. Summary of the Invention

[0003] The object of the present invention is to address the above problems existing in the prior art, and propose a self-locking lifting platform and its production line, which have the characteristics of not setting a separate hydraulic drive device, reducing costs and being able to self-lock.

[0004] The object of the present invention can be achieved by the following technical solutions:

[0005] A self-locking lifting platform, comprising: a base, a lifting platform, and a scissor assembly connecting the two. The scissor assembly includes two sets of scissor members arranged oppositely and a drive shaft group, and the drive shaft group is connected to the intersection point of the two scissor members; the scissor assembly has a first rod group that slides relative to the base, a first end pivotally connected to the base, a second rod group that slides relative to the lifting platform, and a second end pivotally connected to the lifting platform; the first rod group is provided with a one-way self-locking assembly; the one-way self-locking assembly includes a first rack rotatably connected to the first rod group and a second rack fixed to the base;

[0006] Wherein, when the drive shaft group is driven to move upward, the first rack and the second rack are automatically disengaged and move along the first direction A1, so as to lift the lifting platform; when the drive shaft group has a downward trend, the first rack and the second rack are engaged and self-locked to limit the movement toward the second direction A2, so as to limit the descent of the lifting platform. When the first rod group is driven to move upward, the first rack and the second rack are disengaged, so that the lifting platform can descend.

[0007] In the above self-locking lifting platform, the first rack has at least one first tooth, the first tooth has a first gentle slope and a first locking surface, the second rack has a plurality of second teeth, and the second teeth have a second gentle slope and a second locking surface; when the first rack can move toward the first direction A1, the first gentle slope contacts the second gentle slope, so that the first rack disengages from the second rack and slides; when the first rack moves toward the second direction A2, the first locking surface contacts the second locking surface, so that the first rack and the second rack remain engaged and relatively fixed.

[0008] In the above self-locking lifting table, a horizontal guide groove is provided on the base, at least part of the one-way self-locking assembly is arranged in the guide groove, the second rack is fixed on the lower wall of the guide groove, the first rack is arranged in the guide groove, the first rack is connected to the slider through a first elastic assembly, and the slider abuts against the upper wall of the guide groove; wherein, the first elastic assembly is used to keep the first rack and the second rack in a meshed state.

[0009] In the above self-locking lifting table, the first elastic assembly includes a compression spring and at least two guide rods. The guide rods are fixedly connected to the slider. Guide holes are formed in the first rack. The guide rods are slidably matched with the guide holes, and the compression spring is sleeved on the guide rods so that the first rack is parallel to the second rack during displacement.

[0010] In the above self-locking lifting table, the drive shaft group includes a rotating shaft and a first support wheel rotatably arranged on the rotating shaft. The rotating shaft is rotatably connected to the intersection point of the two scissor arms.

[0011] In the above self-locking lifting table, the first rod group includes a support rod and two second support wheels. The two second support wheels are rotatably arranged on the support rod and are spaced apart.

[0012] In the above self-locking lifting table, a manual unlocking device is further included. The manual unlocking device includes a rod body and at least one pull rod. The rod body is arranged below the support rod. The pull rod is fixedly connected to the rod body. The rod body is located between the two second support wheels; wherein, the rod body can drive the first rod group to move upward so that the first rack disengages from the second rack.

[0013] In the above self-locking lifting table, a handle is arranged at the top of the pull rod.

[0014] A lifting production line includes:

[0015] At least one self-locking lifting table capable of moving along a predetermined direction;

[0016] A power station. The power station corresponds to one of the self-locking lifting tables. The power station includes an unlocking assembly and a driving assembly. The driving assembly corresponds to the drive shaft group of the self-locking lifting table and can drive the drive shaft group to lift so as to control the lifting of the lifting table; the unlocking assembly corresponds to the first rod group of the self-locking lifting table and can drive the first rod group to rise. The unlocking assembly is used to separate the first rack and the second rack and release the meshing so that the lifting table can descend.

[0017] In the above-mentioned lifting production line, the driving assembly includes a first driver, a first driving arm, a first lifting frame, and a first fixing frame. The first lifting frame is slidably connected to the first fixing frame and can be adjusted in height. A horizontal first adjustment groove is provided on the first lifting frame. The first driver is connected to the first driving arm. A first driving wheel is rotatably provided at the free end of the first driving arm. The first driving wheel is arranged in the first adjustment groove and can move within the first adjustment groove. Among them, the first driving arm rotates to drive the first driving wheel to change its position in height, so that the plane height position of the first lifting frame changes. The drive shaft group is arranged on the plane of the first lifting frame and can roll relative to the plane of the first lifting frame.

[0018] In the above-mentioned lifting production line, the unlocking assembly includes a second driver, a second driving arm, a second lifting frame, a second fixing frame, and an adjustment frame. The second lifting frame is slidably connected to the second fixing frame and can be adjusted in height. A horizontal second adjustment groove is provided on the second lifting frame. The second driver is connected to the second driving arm. A second driving wheel is rotatably provided at the free end of the second driving arm. The second driving wheel is arranged in the second adjustment groove and can move within the second adjustment groove. The adjustment frame is arranged on the second lifting frame in a liftable manner, and a second elastic member is provided between the adjustment frame and the second lifting frame. Among them, the second driving arm rotates to drive the second driving wheel to change its position in height, so that the plane height position of the adjustment frame changes. The first rod group abuts against the plane of the adjustment frame and can roll on the plane of the adjustment frame. Among them, when the first rod group moves upward, it can drive the first rack to disengage from the second rack. When the first rack disengages from the second rack, there is still a compression space between the adjustment frame and the second fixing frame.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] In the present application, when the drive shaft group is driven to move upward, it drives the entire scissor assembly to move. Due to the structural characteristics of the scissor assembly, the first rod group slides relative to the base. At this time, the first rack and the second rack are automatically disengaged and move along the first direction. During this process, the scissor assembly unfolds, thereby lifting the lifting platform. When the drive shaft group has a downward trend, the first rod group will have a downward tendency accordingly. At this time, the first rack and the second rack quickly engage and lock, restricting the first rod group from moving in the second direction, thereby restricting the lifting platform from descending. When it is necessary to lower the lifting platform, the first rod group is driven to move upward again to disengage the first rack from the second rack, and the lifting platform can descend under the action of its own gravity and the gravity of the drive shaft group. Description of the Drawings

[0021] Figure 1 is a three-dimensional structure diagram of a self-locking lifting platform in the present application;

[0022] Figure 2 is a side view of a self-locking lifting table in the present application;

[0023] Figure 3 is Figure 2 a sectional view at the A-A position in;

[0024] Figure 4 is a structural schematic diagram after the first tooth and the second tooth are separated in the present application;

[0025] Figure 5 is Figure 4 a partial enlarged view in;

[0026] Figure 6 is a layout schematic diagram of the lifting production line in the present application;

[0027] Figure 7 is a three-dimensional structure diagram of the power station in the present application;

[0028] Figure 8 is a three-dimensional structure diagram after the power station cooperates with the self-locking lifting table to be jacked up in the present application;

[0029] In the figure,

[0030] 100, self-locking lifting table;

[0031] 2, base; 21, guide groove; 211, lower wall; 212, upper wall;

[0032] 3, lifting table; 31, guide groove;

[0033] 4, scissor assembly; 41, scissor member; 42, drive shaft group; 421, rotating shaft; 422, first support wheel; 43, first rod group; 431, support rod; 432, second support wheel; 44, first end; 45, second rod group; 451, guide wheel; 46, second end;

[0034] 5, one-way self-locking assembly; 51, first rack; 511, first tooth; 512, first gentle slope; 513, first locking surface; 52, second rack; 521, second tooth; 522, second gentle slope; 523, second locking surface; 524, guide hole; 53, first elastic assembly; 531, compression spring; 532, guide rod; 54, slider;

[0035] 6, manual unlocking device; 61, rod body; 62, pull rod; 621, handle;

[0036] 7, power station;

[0037] 71. Driving assembly; 711. First driver; 7111. First servo motor; 7112. First speed reducer; 712. First driving arm; 7121. First driving wheel; 713. First lifting frame; 7131. First adjusting slot; 714. First fixing frame;

[0038] 72. Unlocking assembly; 721. Second driver; 7211. Second servo motor; 7212. Second speed reducer; 722. Second driving arm; 723. Second lifting frame; 724. Second fixing frame; 725. Adjusting frame; 726. Second elastic member; 7261. Spring; 7262. Guide rod. Detailed implementation mode

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] As Figures 1 to 5 shown, a self-locking lifting platform 100 includes: a base 2, a lifting platform 3, and a scissor assembly 4 connecting the two. The scissor assembly 4 includes two sets of scissor members 41 arranged oppositely and a drive shaft group 42. The drive shaft group 42 is connected to the intersection points of the two scissor members 41; a rotating shaft 421 penetrates through the intersection points of the two scissor members 41; the scissor assembly 4 has a first rod group 43 that slides relative to the base 2, a first end 44 pivotally connected to the base 2, a second rod group 45 that slides relative to the lifting platform 3, and a second end 46 pivotally connected to the lifting platform 3; a one-way self-locking assembly 5 is provided on the first rod group 43; the one-way self-locking assembly 5 includes a first rack 51 rotatably connected to the first rod group 43 and a second rack 52 fixed to the base 2;

[0041] Wherein, when the drive shaft group 42 is driven to move upward, the first rack 51 and the second rack 52 are automatically disengaged and move along the first direction A1 to lift the lifting platform 3; when the drive shaft group 42 has a downward tendency, the first rack 51 and the second rack 52 are engaged and self-locked to restrict movement in the second direction A2 to restrict the lifting platform 3 from descending. When the first rod group 43 is driven to move upward, the first rack 51 and the second rack 52 are disengaged to enable the lifting platform 3 to descend.

[0042] In this application, when the drive shaft group 42 is driven to move upward, it drives the entire scissor assembly 4. Due to the structural characteristics of the scissor assembly 4, the first rod group 43 slides relative to the base 2. At this time, the first rack 51 and the second rack 52 are automatically disengaged from meshing and move along the first direction A1. During this process, the scissor assembly 4 unfolds, thereby lifting the lifting platform 3; when the drive shaft group 42 has a downward tendency, the first rod group 43 will have a downward tendency accordingly. At this time, the first rack 51 and the second rack 52 quickly engage and lock, restricting the first rod group 43 from moving in the second direction A2, thereby restricting the lowering of the lifting platform 3. When it is necessary to lower the lifting platform 3, the first rod group 43 is driven to move upward again to disengage the first rack 51 and the second rack 52, and the lifting platform 3 can then descend under the action of its own gravity and the gravity of the drive shaft group 42.

[0043] The setting of the one-way self-locking assembly 5 can quickly lock itself when the drive shaft group 42 has a downward tendency, effectively preventing the accidental lowering of the lifting platform 3, greatly improving the safety of the device during use, and avoiding safety accidents caused by equipment failures. Moreover, through the one-way self-locking of the first rack 51 and the second rack 52, the stability of the equipment can be effectively provided.

[0044] Furthermore, in the lifting device of this application, a separate driving device is not provided. During production, an external driving device can be used to drive the lifting of the lifting platform 3, and multiple lifting platforms 3 can be used in cooperation with one driving device, greatly reducing the number of driving devices, as well as the equipment cost and maintenance cost.

[0045] Furthermore, a guide groove 31 is also provided on the lifting platform 3, and a guide wheel 451 is provided at the end of the second rod group 45. The guide wheel 451 is arranged in the guide groove 31 and translates along the guide groove 31.

[0046] Specifically, as Figures 1 to 5 shown, the first rack 51 has at least one first tooth 511, the first tooth 511 has a first gentle slope 512 and a first locking surface 513, the second rack 52 has a plurality of second teeth 521, and the second teeth 521 have a second gentle slope 522 and a second locking surface 523; when the first rack 51 can move in the first direction A1, the first gentle slope 512 contacts the second gentle slope 522, so that the first rack 51 disengages from meshing with the second rack 52 and slides; when the first rack 51 moves in the second direction A2, the first locking surface 513 contacts the second locking surface 523, so that the first rack 51 and the second rack 52 remain meshed and relatively fixed.

[0047] During the operation of the self-locking lifting platform 100, when the drive shaft group 42 rises, the first rod group 43 moves towards the first direction A1, and then drives the first rack 51 to move towards the first direction A1. When the first rack 51 moves, the first gentle slope 512 of the first rack 51 comes into contact with the second gentle slope 522 of the second rack 52. Due to the special design of the gentle slopes, a component force that causes the first rack 51 to disengage from the second rack 52 will be generated when they come into contact. Under the action of this component force, the first rack 51 can smoothly slide along the second rack 52, realizing the disengagement of the first rack 51 from the second rack 52, so that the scissors assembly 4 can be unfolded and the lifting of the lifting platform 3 can be completed.

[0048] When the drive shaft group 42 has a downward trend and the first rod group 43 drives the first rack 51 to move towards the second direction A2, the first locking surface 513 of the first rack 51 comes into contact with the second locking surface 523 of the second rack 52. The designs of these two locking surfaces are flat and fit each other. When they come into contact, they can provide sufficient resistance to prevent the first rack 51 from moving relative to the second rack 52. In this case, the first rack 51 and the second rack 52 remain engaged and relatively fixed, thereby effectively preventing the lifting platform 3 from descending and realizing the self-locking function.

[0049] The designs of the first gentle slope 512 and the second gentle slope 522 enable the first rack 51 and the second rack 52 to disengage from each other efficiently and smoothly during the ascent of the lifting platform 3. This design reduces the jamming and resistance during the unlocking process. When the first locking surface 513 and the second locking surface 523 come into contact with each other, they can form a tight fit and provide a strong resistance to movement. This design ensures that when the lifting platform 3 bears a load and has a downward trend, the self-locking structure can function reliably and effectively prevent the lifting platform 3 from accidentally descending.

[0050] Another function of the first gentle slope 512 and the second gentle slope 522 is that when the first rack 51 is subjected to downward gravity, they can play a guiding role to enable the first rack 51 and the second rack 52 to mesh into the best position, thereby making the locking more secure.

[0051] Furthermore, the first locking surface 513 and the second locking surface 523 adopt a vertical design. The vertical design can facilitate the disengagement of the first rack 51 from the second rack 52 when the first rack 51 is lifted upward. As Figures 4 to 5 shown.

[0052] The number of the first teeth 511 of the first rack 51 is one or more, such as 5, 6, 20. During the meshing process, it can be locked more stably and enable the lifting platform 3 to bear a greater weight. The first teeth 511 on the first rack 51 are arranged oppositely to the second teeth 521 of the second rack 52.

[0053] Specifically, as Figures 2 to 4 shown, a horizontal guide groove 21 is provided on the base 2, at least part of the one-way self-locking assembly 5 is arranged in the guide groove 21, the second rack 52 is fixed to the lower wall 211 of the guide groove 21, the first rack 51 is arranged in the guide groove 21, the first rack 51 is connected to the slider 54 through a first elastic assembly 53, and the slider 54 abuts against the upper wall 212 of the guide groove 21; wherein, the first elastic assembly 53 is used to keep the first rack 51 and the second rack 52 in a meshed state.

[0054] The guide groove 21 on the base 2 provides a specific running track for the one-way self-locking assembly 5. When the device is in the initial state or the lifting platform 3 is stationary, the first elastic assembly 53 plays a role. The elastic force generated by it pushes the first rack 51 downward, so that the first rack 51 remains meshed with the second rack 52 fixed to the lower wall 211 of the guide groove 21, thereby maintaining the locking of the lifting platform 3.

[0055] When the drive shaft group 42 is driven to move upward, the first slow slope 512 of the first rack 51 contacts the second slow slope 522 of the second rack 52. The component force generated by the contact between the two further causes the first rack 51 to disengage from the second rack 52. The first elastic assembly 53 is compressed, and the elastic force temporarily cannot maintain the close meshing of the first rack 51 and the second rack 52. The first rack 51 moves in the guide groove 21 together with the slider 54, and the scissor assembly 4 unfolds to realize the lifting of the lifting platform 3. After the drive shaft group 42 stops rising, the first elastic assembly 53 can quickly reset, thereby promoting the first rack 51 to recover downward and mesh with the second rack 52 again, realizing the self-locking of the lifting platform 3.

[0056] Specifically, as Figures 3 to 4 shown, the first elastic assembly 53 includes a compression spring 531 and at least two guide rods 532. The guide rods 532 are fixedly connected to the slider 54. A guide hole 524 is provided on the first rack 51. The guide rods 532 are slidably matched with the guide hole 524, and the compression spring 531 is sleeved on the guide rods 532 to make the first rack 51 parallel to the second rack 52 during displacement.

[0057] The sliding fit of at least two guide rods 532 and the guide hole 524 provides an accurate guiding effect for the movement of the first rack 51, ensuring that the first rack 51 is always parallel to the second rack 52 whether the first rack 51 rises out of engagement or descends to re-engage.

[0058] When the first rack 51 disengages from the second rack 52, or when the first rack 51 meshes with the second rack 52, all the first teeth 511 come into contact with or disengage from the second teeth 521 synchronously, which not only avoids problems such as jamming and wear caused by the inclination of the rack, extends the service life of the rack, but also ensures the smoothness and stability of the self-locking and unlocking processes.

[0059] In this application, two guide rods 532 are provided.

[0060] Specifically, as Figures 1 to 2 shown, the drive shaft group 42 includes a rotating shaft 421 and a first support wheel 422 rotatably arranged on the rotating shaft 421, and the rotating shaft 421 is rotatably connected to the intersection of the two scissor members 41.

[0061] During the rising or falling process of the drive shaft group 42, the drive shaft group 42 not only changes its position in height, but also has a position change on the horizontal plane.

[0062] The setting of the first support wheel 422 enables frictional contact with the first support wheel 422 during the lifting process of the drive shaft group 42, which is transformed into a smaller rolling friction force, rather than directly contacting the rotating shaft 421, making its movement smoother.

[0063] Specifically, as Figures 1 to 2 shown, the first rod group 43 includes a support rod 431 and two second support wheels 432, and the two second support wheels 432 are rotatably arranged on the support rod 431 and are spaced apart.

[0064] The rotatable setting of the second support wheel 432 transforms the relatively large frictional force generated when the support rod 431 slides against other components into a smaller rolling friction force, which can make the first rod group 43 slide more smoothly relative to the base 2 or other components, reduce power loss, and ensure the smooth and efficient rising and falling processes of the lifting platform 3.

[0065] Specifically, as Figures 1 to 2 shown, it further includes a manual unlocking device 6, and the manual unlocking device 6 includes a rod body 61 and at least one pull rod 62. The rod body 61 is arranged below the support rod 431, the pull rod 62 is fixedly connected to the rod body 61, and the rod body 61 is located between the two second support wheels 432; wherein, the rod body 61 can drive the first rod group 43 to move upward so that the first rack 51 disengages from the second rack 52.

[0066] When a manual unlocking operation is required, the operator applies an upward external force to the pull rod 62. Since the pull rod 62 is fixedly connected to the rod body 61, this external force will be transmitted to the rod body 61, causing the rod body 61 to move upward. The rod body 61 is located between two second support wheels 432 and contacts the lower part of the first rod group 43. The upward movement of the rod body 61 will drive the first rod group 43 to move upward synchronously. As the first rod group 43 rises, the first rack 51 connected to the first rod group 43 also moves upward. At this time, the first rack 51 disengages from the second rack 52, and the lifting platform 3 can descend under the action of gravity or other external forces.

[0067] Within the gap between the rod body 61, the support rod 431, and the two second support wheels 432, it is ensured that there is no mechanical interference during the sliding of the second support wheels 432. In other solutions, the lower end of the pull rod 62 is threadedly connected to the rod body 61, and the lower end of the pull rod 62 abuts against the base. When the pull rod 62 is rotated, it can drive the rod body 61 to move up and down along the thread direction, and unlocking is achieved when the rod body 61 rises to a predetermined position.

[0068] Specifically, as Figures 1 to 2 shown, a handle 621 is provided at the top of the pull rod 62.

[0069] The provision of the handle 621 provides a more comfortable and easier-to-grasp force application point for the operator. Compared with directly applying force to the pull rod 62, the operator can apply force more easily and stably through the handle 621. Especially in an emergency situation where quick unlocking is required, it can greatly improve the convenience of operation and make the manual unlocking operation more smooth and efficient.

[0070] As Figures 6 to 8 shown, a lifting production line includes: at least one self-locking lifting platform 100 that can move along a predetermined direction D, and a power station 7. The power station 7 corresponds to one of the self-locking lifting platforms 100. The power station 7 includes an unlocking component 72 and a driving component 71. The driving component 71 corresponds to the drive shaft group 42 of the self-locking lifting platform 100 and can drive the drive shaft group 42 to lift and lower to control the lifting and lowering of the lifting platform 3; the unlocking component 72 corresponds to the first rod group 43 of the self-locking lifting platform 100 and can drive the first rod group 43 to rise. The unlocking component 72 is used to separate and disengage the first rack 51 and the second rack 52 so that the lifting platform 3 can descend.

[0071] In this set of lifting production lines, the power station 7 plays a core driving and controlling role. When it is necessary to control the self-locking lifting table 100 to work, the driving component 71 of the power station 7 starts to operate. The driving component 71 corresponds precisely to the drive shaft group 42 of the self-locking lifting table 100, and drives the drive shaft group 42 to perform lifting actions by outputting power. When the driving component 71 outputs an upward driving force, the drive shaft group 42 rises accordingly. Since the drive shaft group 42 is rotationally connected to the scissor component 4, this upward movement will drive the scissor component 4 to unfold, thereby pushing the lifting table 3 upward to achieve the upward transportation of goods or personnel.

[0072] When it is necessary to lower the lifting table 3, the unlocking component 72 of the power station 7 comes into play. The unlocking component 72 corresponds to the first rod group 43 of the self-locking lifting table 100, and drives the first rod group 43 to rise by applying an upward acting force. As the first rod group 43 rises, the first rack 51 connected to the first rod group 43 also rises synchronously. The first rack 51 disengages from the second rack 52. After unlocking, the lifting table 3 starts to descend under the action of gravity or an additional downward external force, completing a complete downward transportation process.

[0073] One power station 7 can correspond to multiple self-locking lifting tables 100. Compared with each self-locking lifting table 100 being equipped with an independent power source, the procurement cost of power equipment is greatly reduced. For example, in a production line with 60 self-locking lifting tables 100, if a single power source configuration is adopted, only the procurement cost of the power station 7 equipment can save a large amount of funds. At the same time, the centralized design of the power station 7 makes work such as wiring, installation and commissioning more convenient, further reducing the overall installation cost and later maintenance cost. The power station 7 is centrally arranged, and there is no need to reserve space for installing power equipment at each self-locking lifting table 100, saving a large amount of production space. The separation setting of the power station 7 and the self-locking lifting table 100 can greatly reduce costs.

[0074] Specifically, such as Figures 6 to 8As shown in the figure, the driving assembly 71 includes a first driver 711, a first driving arm 712, a first lifting frame 713, and a first fixing frame 714. The first lifting frame 713 is slidably connected to the first fixing frame 714 and can be adjusted in height. A horizontal first adjustment groove 7131 is provided on the first lifting frame 713. The first driver 711 is connected to the first driving arm 712. A first driving wheel 7121 is rotatably provided at the free end of the first driving arm 712. The first driving wheel 7121 is arranged in the first adjustment groove 7131 and can move within the first adjustment groove 7131. Among them, the first driving arm 712 rotates and drives the first driving wheel 7121 to change its position in height, so that the plane height position of the first lifting frame 713 changes. The drive shaft group 42 is arranged on the plane of the first lifting frame 713 and can roll relative to the plane of the first lifting frame 713.

[0075] When the power station 7 receives an instruction to control the self-locking lifting platform 100 to rise, the first driver 711 is activated. When the first driving arm 712 rotates upward, the first driving wheel 7121 rises accordingly, pushing the first adjustment groove 7131 to make the first lifting frame 713 slide upward along the first fixing frame 714, thereby realizing the elevation of the plane height position of the first lifting frame 713. And the drive shaft group 42 is arranged on the plane of the first lifting frame 713. As the height of the first lifting frame 713 increases, the drive shaft group 42 also rises synchronously. Also, because the drive shaft group 42 is rotationally connected to the scissor assembly 4, the rise of the drive shaft group 42 drives the scissor assembly 4 to unfold, and finally realizes the rise of the lifting platform 3.

[0076] When it is necessary to control the self-locking lifting platform 100 to descend, the first driver 711 runs in reverse, driving the first driving arm 712 to rotate in reverse. The first driving wheel 7121 moves downward in the first adjustment groove 7131, pulling the first adjustment groove 7131 to make the first lifting frame 713 slide downward along the first fixing frame 714. The drive shaft group 42 descends accordingly, the scissor assembly 4 contracts, and the lifting platform 3 descends. At the same time, since the drive shaft group 42 can roll relative to the plane of the first lifting frame 713, during the rising or descending process of the first lifting frame 713, the drive shaft group 42 can flexibly adjust its position to adapt to the movement changes during the entire lifting process and ensure the smooth progress of the lifting action. Of course, this process needs to be operated under the condition that the unlocking assembly 72 unlocks the one-way self-locking assembly 5. In the case of non-unlocking, even if the drive shaft group 42 descends, the lifting platform 3 will not descend.

[0077] Further, as Figure 7 shown, the first driver 711 includes a first servo motor 7111 and a first speed reducer 7112. The first servo motor 7111 is connected to the first driving arm 712 through the first speed reducer 7112.

[0078] Specifically, asFigures 6 to 8 As shown, the unlocking component 72 includes a second driver 721, a second driving arm 722, a second lifting frame 723, a second fixing frame 724, and an adjusting frame 725; the second lifting frame 723 is slidably connected to the second fixing frame 724 and can be adjusted in height. A horizontal second adjusting groove is provided on the second lifting frame 723; the second driver 721 is connected to the second driving arm 722, and a second driving wheel is rotatably provided at the free end of the second driving arm 722. The second driving wheel is arranged in the second adjusting groove and can move in the second adjusting groove; the adjusting frame 725 is arranged on the second lifting frame 723 in a liftable manner, and a second elastic member 726 is provided between the adjusting frame 725 and the second lifting frame 723. Among them, the second driving arm 722 rotates to drive the second driving wheel to change its position in height, so that the plane height position of the adjusting frame 725 changes. The first rod group 43 abuts against the plane of the adjusting frame 725 and can roll on the plane of the adjusting frame 725; among them, when the first rod group 43 moves upward, it can drive the first rack 51 to disengage from the second rack 52, and when the first rack 51 disengages from the second rack 52, there is still a compression space between the adjusting frame 725 and the second fixing frame 724.

[0079] When the power station 7 receives an unlocking instruction, the second driver 721 is activated. The second driver 721 drives the connected second driving arm 722 to start rotating. As the second driving arm 722 rotates, the position of the second driving wheel rotatably provided at its free end changes. Since the second driving wheel is located in the second adjusting groove of the second lifting frame 723, the change in the height position of the second driving wheel pushes the second adjusting groove, thereby driving the second lifting frame 723 to slide upward along the first fixing frame 714. During the upward movement of the second lifting frame 723, the adjusting frame 725 connected to the second lifting frame 723 also rises synchronously. Because a second elastic member 726 is provided between the adjusting frame 725 and the second lifting frame 723, the second elastic member 726 will be gradually compressed during the upward movement. When the adjusting frame 725 rises, its plane abuts against the first rod group 43 and pushes the first rod group 43 upward. Since the first rod group 43 and the plane of the adjusting frame 725 can roll relative to each other, this process is smooth and stable. As the first rod group 43 moves upward, the connected first rack 51 also moves upward, and the first rack 51 meshes with the second rack 52. When the first rack 51 completely disengages from the second rack 52, there is still a compression space between the adjusting frame 725 and the second fixing frame 724. This ensures that even in the event of some unexpected situations during the unlocking process, such as instantaneous impact force, etc., the second elastic member 726 can still play a buffering role and maintain the stability of the unlocking state.

[0080] When it is necessary to restore the locked state, the second driver 721 runs in reverse, driving the second driving arm 722 to rotate in reverse. The second driving wheel moves downward in the second adjustment groove, pulling the second adjustment groove to make the second lifting frame 723 slide downward along the first fixing frame 714. The adjustment frame 725 descends accordingly. The first rod group 43 returns to its initial position under the action of gravity, and the first rack 51 and the second rack 52 are re-engaged to lock the self-locking lifting table 100.

[0081] Further, as Figure 7 shown, the second driver 721 includes a second servo motor 7211 and a second speed reducer 7212. The second servo motor 7211 is connected to the second driving arm 722 through the second speed reducer 7212.

[0082] Further, as Figure 7 shown, the second elastic member 726 includes a spring 7261 and a guide rod 7262. The guide rod 7262 is fixed on the adjustment frame 725, and the guide rod 7262 is slidably connected to the second lifting frame 723. The spring 7261 is sleeved on the guide rod 7262, and the elastic force of the spring 7261 is greater than the elastic force of the compression spring.

[0083] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back..., are only used to explain the relative positional relationship and movement conditions between various components in a specific posture, as shown in the drawings. If the specific posture changes, the directional indication will also change accordingly.

[0084] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. At the same time, the meaning of "and / or" appearing throughout the text is to include three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0085] The above components are all common standard components or components known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or by conventional experimental methods.

[0086] The specific embodiments described herein are merely illustrative of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the present invention or exceed the scope defined by the appended claims.

Claims

1. A self-locking lifting device, characterized in that, Comprising: A base (2), a lifting platform (3), and a scissor assembly (4) connecting the two. The scissor assembly (4) includes two sets of oppositely arranged scissor members (41) and a drive shaft group (42). The drive shaft group (42) is connected to the intersection of the two scissor members (41). The scissor assembly (4) has a first rod group (43) that slides relative to the base (2), a first end (44) pivotally connected to the base (2), a second rod group (45) that slides relative to the lifting platform (3), and a second end (46) pivotally connected to the lifting platform (3). The first rod group (43) is provided with a one-way self-locking assembly (5). The one-way self-locking assembly (5) includes a first rack (51) rotatably connected to the first rod group (43) and a second rack (52) fixed to the base (2). Wherein, when the drive shaft group (42) is driven to move upward, the first rack (51) automatically disengages from the second rack (52) and moves along the first direction A1 to lift the lifting platform (3). When the drive shaft group (42) has a downward tendency, the first rack (51) engages with the second rack (52) and self-locks to restrict movement in the second direction A2 to restrict the lowering of the lifting platform (3). When the first rod group (43) is driven to move upward, the first rack (51) disengages from the second rack (52) to enable the lifting platform (3) to descend. The first rod group (43) includes a support rod (431) and two second support wheels (432). The two second support wheels (432) are rotatably arranged on the support rod (431) and are spaced apart. It further includes a manual unlocking device (6). The manual unlocking device (6) includes a rod body (61) and at least one pull rod (62). The rod body (61) is arranged below the support rod (431). The lower end of the pull rod (62) is threadedly connected to the rod body (61). The rod body (61) is located between the two second support wheels (432). Wherein, the rod body (61) can drive the first rod group (43) to move upward to disengage the first rack (51) from the second rack (52). The lower end of the pull rod (62) abuts against the base (2). When the pull rod (62) is rotated, it can drive the rod body (61) to move up and down along the threaded direction, and unlocking is achieved when the rod body (61) rises to a predetermined position.

2. The self-locking lifting device according to claim 1, characterized in that, The first rack (51) has at least one first tooth (511), the first tooth (511) has a first inclined surface (512) and a first locking surface (513), the second rack (52) has a plurality of second teeth (521), and the second teeth (521) have a second inclined surface (522) and a second locking surface (523); when the first rack (51) can move in the first direction A1, the first inclined surface (512) contacts the second inclined surface (522) so that the first rack (51) disengages from and slides relative to the second rack (52); when the first rack (51) moves in the second direction A2, the first locking surface (513) contacts the second locking surface (523) so that the first rack (51) remains engaged with and relatively fixed to the second rack (52).

3. The self-locking lifting device according to claim 1, wherein, A horizontal guide groove (21) is provided on the base (2), at least part of the one-way self-locking assembly (5) is arranged in the guide groove (21), the second rack (52) is fixed to the lower wall (211) of the guide groove (21), the first rack (51) is arranged in the guide groove (21), and the first rack (51) is connected to a slider (54) through a first elastic component (53), and the slider (54) abuts against the upper wall (212) of the guide groove (21); wherein, the first elastic component (53) is used to keep the first rack (51) and the second rack (52) in an engaged state.

4. The self-locking lifting device according to claim 3, characterized in that, The first elastic component (53) includes a compression spring (531) and at least two guide rods (532), the guide rods (532) are fixedly connected to the slider (54), a guide hole (524) is formed in the second rack (52), the guide rods (532) are slidably matched with the guide hole (524), and the compression spring (531) is sleeved on the guide rods (532) so that the second rack (52) is parallel to the first rack (51) during displacement.

5. The self-locking lifting device according to claim 1, wherein, The drive shaft group (42) includes a rotating shaft (421) and a first support wheel (422) rotatably arranged on the rotating shaft (421), and the rotating shaft (421) is rotatably connected to the intersection of two scissor members (41).

6. A lifting production line, characterized in that, Comprising: At least one self-locking lifting device (100) according to any one of claims 1-5 that can move along a predetermined direction; A power station (7), the power station (7) corresponds to one of the self-locking lifting devices (100), the power station (7) includes an unlocking component (72) and a driving component (71), the driving component (71) corresponds to the drive shaft group (42) of the self-locking lifting device (100), and can drive the drive shaft group (42) to lift to control the lifting of the lifting platform (3); the unlocking component (72) corresponds to the first rod group (43) of the self-locking lifting device (100), and can drive the first rod group (43) to rise, and the unlocking component (72) is used to separate and disengage the first rack (51) and the second rack (52) so that the lifting platform (3) can descend.

7. The lifting production line according to claim 6, wherein, The driving component (71) includes a first driver (711), a first driving arm (712), a first lifting frame (713), and a first fixing frame (714). The first lifting frame (713) is slidably connected to the first fixing frame (714) and can be adjusted in height. A horizontal first adjustment groove (7131) is provided on the first lifting frame (713). The first driver (711) is connected to the first driving arm (712). A first driving wheel (7121) is rotatably provided at the free end of the first driving arm (712). The first driving wheel (7121) is arranged in the first adjustment groove (7131) and can move within the first adjustment groove (7131). Wherein, the first driving arm (712) rotates to drive the first driving wheel (7121) to change its position in height, so as to change the plane height position of the first lifting frame (713). The drive shaft group (42) is arranged on the plane of the first lifting frame (713) and can roll relative to the plane of the first lifting frame (713).

8. The lifting production line according to claim 7, wherein The unlocking component (72) includes a second driver (721), a second driving arm (722), a second lifting frame (723), a second fixing frame (724), and an adjustment frame (725). The second lifting frame (723) is slidably connected to the second fixing frame (724) and can be adjusted in height. A horizontal second adjustment groove is provided on the second lifting frame (723). The second driver (721) is connected to the second driving arm (722). A second driving wheel is rotatably provided at the free end of the second driving arm (722). The second driving wheel is arranged in the second adjustment groove and can move within the second adjustment groove. The adjustment frame (725) is liftably arranged on the second lifting frame (723), and a second elastic member (726) is provided between the adjustment frame (725) and the second lifting frame (723). Wherein, the second driving arm (722) rotates to drive the second driving wheel to change its position in height, so as to change the plane height position of the adjustment frame (725). The first rod group (43) abuts against the plane of the adjustment frame (725) and can roll on the plane of the adjustment frame (725). Wherein, when the first rod group (43) moves upward, it can drive the first rack (51) to disengage from the second rack (52). And when the first rack (51) disengages from the second rack (52), there is still a compression space between the adjustment frame (725) and the second fixing frame (724).

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