Self-locking lifting platform and production line thereof

Abstract

The invention provides a self-locking lifting platform and a production line thereof, and belongs to the technical field of machinery. A self-locking type lifting platform comprises a base, a lifting platform body and a shear fork assembly connecting the base and the lifting platform body, the shear fork assembly comprises two sets of shear fork pieces arranged oppositely and a driving shaft set, and the driving shaft set is connected to the intersection point of the two shear fork pieces; the shear fork assembly is provided with a first rod set sliding relative to the base, a first end connected with the base in a pivoted mode, a second rod set sliding relative to the lifting table and a second end connected with the lifting table in a pivoted mode. The first rod group is provided with a one-way self-locking assembly; the one-way self-locking assembly comprises a first rack rotationally connected with the first rod set and a second rack fixed to the base. The device has the advantages that an independent hydraulic driving device is not arranged, the cost is reduced, and self-locking can be achieved.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology, and in particular to a self-locking lifting platform and a production line thereof. Background Art

[0002] A lifting platform is a device used for vertical transportation in logistics systems such as factories and automatic warehouses, and is also used to transport workpieces vertically. It is usually hydraulically driven, but under normal configuration, each lifting platform is equipped with a hydraulic drive mechanism, which leads to a large number of hydraulic drive mechanisms, which in turn makes the equipment cost and maintenance cost higher. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems in the existing technology and to propose a self-locking lifting platform and its production line, which has the characteristics of not requiring a separate hydraulic drive device, reducing costs and being able to self-lock.

[0004] The purpose of the present invention can be achieved by the following technical solutions: A self-locking lifting platform, comprising: a base, a lifting platform and a scissor assembly connecting the two, the scissor assembly comprising two sets of scissor parts and a drive shaft assembly arranged opposite to each other, the drive shaft assembly being connected to the intersection of the two scissor parts; the scissor assembly comprising a first rod group sliding relative to the base, a first end pivotally connected to the base, a second rod group sliding 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 comprises a first rack rotatably connected to the first rod group and a second rack fixed to the base; Among them, when the driving shaft group is driven upward, the first rack and the second rack are automatically disengaged and move along the first direction A1 to lift the lifting platform; when the driving shaft group has a downward trend, the first rack and the second rack are engaged and self-locked and restricted to move in the second direction A2 to limit the descent of the lifting platform. When the first rod group is driven upward, the first rack and the second rack are disengaged to allow the lifting platform to descend.

[0005] In the above-mentioned 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, and the second rack has a plurality of second teeth, the second teeth have a second gentle slope and a second locking surface; when the first rack is able to move toward the first direction A1, the first gentle slope contacts the second gentle slope so that the first rack disengages and slides relative to the second rack; 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.

[0006] In the above-mentioned self-locking lifting platform, a horizontal guide groove is arranged on the base, at least part of the one-way self-locking component is arranged in the guide groove, the second rack is fixed to 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 the first elastic component, and the slider is against the upper wall of the guide groove; wherein, the first elastic component is used to make the first rack and the second rack in a meshing state.

[0007] In the above-mentioned self-locking lifting platform, the first elastic component includes a compression spring and at least two guide rods, the guide rods are fixedly connected to the slider, a guide hole is opened on 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 when displaced.

[0008] In the above self-locking lifting platform, the driving shaft group includes a rotating shaft and a first supporting wheel rotatably arranged on the rotating shaft, and the rotating shaft is rotatably connected to the intersection of the two scissor parts.

[0009] In the above self-locking lifting platform, the first rod group includes a support rod and two second support wheels, and the two second support wheels are rotatably arranged on the support rod and are arranged at intervals.

[0010] The above-mentioned self-locking lifting platform also includes a manual unlocking device, which includes a rod body and at least one pull rod. The rod body is arranged below the support rod, and the pull rod is fixedly connected to the rod body. The rod body is located between two second support wheels; wherein the rod body can drive the first rod group to move upward so that the first rack is disengaged from the second rack.

[0011] In the above self-locking lifting platform, a handle is provided on the top of the pull rod.

[0012] A lifting production line, comprising: at least one self-locking lifting platform capable of moving in a predetermined direction; A power station, the power station corresponds to one of the self-locking lifting platforms, the power station includes an unlocking component and a driving component, the driving component corresponds to the driving shaft group of the self-locking lifting platform, and can drive the driving shaft group to rise and fall to control the lifting platform; the unlocking component corresponds to the first rod group of the self-locking lifting platform, and can drive the first rod group to rise, the unlocking component is used to separate and disengage the first rack and the second rack so that the lifting platform can descend.

[0013] 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 fixed frame. The first lifting frame is slidably connected to the first fixed frame and can be adjusted in height. The first lifting frame is provided with a horizontal first adjustment slot. The first driver is connected to the first driving arm. A first driving wheel is rotatably provided on the free end of the first driving arm. The first driving wheel is provided in the first adjustment slot and can move in the first adjustment slot; wherein, the first driving arm rotates and drives the first driving wheel to change its position in height, so that the plane height position of the first lifting frame changes, and the driving shaft group is provided on the plane of the first lifting frame and can roll relative to the plane of the first lifting frame.

[0014] In the above-mentioned lifting production line, the unlocking component includes a second driver, a second driving arm, a second lifting frame, a second fixed frame, and an adjusting frame; the second lifting frame is slidably connected to the second fixed frame and can be adjusted in height, and a horizontal second adjusting slot is provided on the second lifting frame; the second driver is connected to the second driving arm, and a second driving wheel is rotatably provided on the free end of the second driving arm, and the second driving wheel is provided in the second adjusting slot and can move in the second adjusting slot; the adjusting frame is liftably provided on the second lifting frame, and a second elastic member is provided between the adjusting frame and the second lifting frame, wherein the second driving arm rotates and drives the second driving wheel to change its position in height, so that the plane height position of the adjusting frame changes, and the first rod group abuts against the plane of the adjusting frame and can roll on the plane of the adjusting frame; wherein the first rod group moves upward to drive the first rack to disengage from the second rack, and when the first rack disengages from the second rack, there is still a compression space between the adjusting frame and the second fixed frame.

[0015] Compared with the prior art, this application has the following advantages: In the present application, when the driving shaft group is driven upward, it drives the scissors-type assembly to move as a whole. Due to the structural characteristics of the scissors-type 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 in the first direction. In this process, the scissors-type assembly unfolds, thereby lifting the lifting platform; and when the driving shaft group has a downward trend, the first rod group will also have a downward tendency. At this time, the first rack and the second rack are quickly engaged and self-locked, limiting the movement of the first rod group in the second direction, thereby limiting the descent of the lifting platform. When the lifting platform needs to be lowered, the first rod group is driven upward again to disengage the first rack and the second rack, and the lifting platform can then descend under the gravity of the lifting platform and the driving shaft group itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of a self-locking lifting platform in the present application; Figure 2 It is a side view of a self-locking lifting platform in the present application; Figure 3 yes Figure 2 A cross-sectional view at the AA position; Figure 4 This is a schematic diagram of a structure after the first tooth and the second tooth are separated in the present application; Figure 5 yes Figure 4 A partial enlarged view of; Figure 6 This is a schematic diagram of the layout of the lifting production line in this application; Figure 7 It is a three-dimensional structural diagram of the power station in this application; Figure 8 It is a three-dimensional structural diagram of the power station in this application after being lifted with a self-locking lifting platform; In the figure, 100. Self-locking lifting platform; 2. base; 21. guide groove; 211. lower wall; 212. upper wall; 3. Lifting platform; 31. Guide groove; 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; 5. One-way self-locking component; 51. First rack; 511. First tooth; 512. First slow slope; 513. First locking surface; 52. Second rack; 521. Second tooth; 522. Second slow slope; 523. Second locking surface; 524. Guide hole; 53. First elastic component; 531. Compression spring; 532. Guide rod; 54. Slider; 6. Manual unlocking device; 61. Rod body; 62. Pull rod; 621. Handle; 7. Power station; 71, driving assembly; 711, first driver; 7111, first servo motor; 7112, first reducer; 712, first driving arm; 7121, first driving wheel; 713, first lifting frame; 7131, first adjusting slot; 714, first fixing frame; 72. unlocking assembly; 721. second driver; 7211. second servo motor; 7212. second 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 DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figures 1 to 5 As shown, a self-locking lifting platform 100 comprises: a base 2, a lifting platform 3 and a scissor assembly 4 connecting the two, the scissor assembly 4 comprises two sets of scissor parts 41 and a drive shaft assembly 42 arranged opposite to each other, the drive shaft assembly 42 is connected to the intersection of the two scissor parts 41; a rotating shaft 421 passes through the intersection of the two scissor parts 41; the scissor assembly 4 comprises a first rod group 43 sliding relative to the base 2, a first end 44 pivotally connected to the base 2, a second rod group 45 sliding 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 comprises a first rack 51 rotatably connected to the first rod group 43 and a second rack 52 fixed to the base 2; When the drive shaft group 42 is driven 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 trend, the first rack 51 and the second rack 52 are engaged and self-locked and restricted to move in the second direction A2 to limit the descent of the lifting platform 3. When the first rod group 43 is driven upward, the first rack 51 and the second rack 52 are disengaged to allow the lifting platform 3 to descend.

[0019] In the present application, when the driving shaft group 42 is driven upward, the scissors assembly 4 is driven to move as a whole. Due to the structural characteristics of the scissors 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 and move along the first direction A1. In this process, the scissors assembly 4 is unfolded, thereby lifting the lifting platform 3; and when the driving shaft group 42 has a downward trend, the first rod group 43 will also have a downward trend. At this time, the first rack 51 and the second rack 52 are quickly engaged and self-locked, limiting the movement of the first rod group 43 toward the second direction A2, thereby limiting the descent of the lifting platform 3. When the lifting platform 3 needs to be lowered, the first rod group 43 is driven upward again to disengage the first rack 51 and the second rack 52, and the lifting platform 3 can be lowered by relying on the gravity of the lifting platform 3 and the driving shaft group 42.

[0020] The one-way self-locking component 5 can quickly self-lock when the drive shaft group 42 has a downward trend, effectively preventing the lifting platform 3 from accidentally descending, greatly improving the safety of the device during use, and avoiding safety accidents caused by equipment failure. In addition, the one-way self-locking of the first rack 51 and the second rack 52 can effectively provide equipment stability.

[0021] Moreover, the lifting device in the present application does not have a separate driving device. During the generation process, an external driving device can be used to drive the lifting platform 3 to rise and fall. Multiple lifting platforms 3 can be used in conjunction with one driving device, which greatly reduces the number of driving devices and reduces equipment costs and maintenance costs.

[0022] 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 disposed in the guide groove 31 and translates along the guide groove 31 .

[0023] Specifically, Figures 1 to 5 As shown, the first rack 51 has at least one first tooth 511, the first tooth 511 has a first gently inclined surface 512 and a first locking surface 513, and the second rack 52 has a plurality of second teeth 521, and the second tooth 521 has a second gently inclined surface 522 and a second locking surface 523; when the first rack 51 is able to move toward the first direction A1, the first gently inclined surface 512 contacts the second gently inclined surface 522, so that the first rack 51 disengages and slides relative to the second rack 52; when the first rack 51 moves toward 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 engaged and relatively fixed.

[0024] During the operation of the self-locking lifting platform 100, when the driving shaft group 42 rises and the first rod group 43 moves toward the first direction A1, thereby driving the first rack 51 to move toward the first direction A1, the first slow slope 512 of the first rack 51 and the second slow slope 522 of the second rack 52 contact each other. Due to the special design of the slow slopes, a component force is generated when the two contact to disengage the first rack 51 from the second rack 52. Under the action of this component force, the first rack 51 can slide smoothly along the second rack 52 to achieve the disengagement of the first rack 51 from the second rack 52, so that the scissors assembly 4 can be unfolded to complete the lifting action of the lifting platform 3. When the driving shaft group 42 has a downward trend and the first rod group 43 drives the first rack 51 to move toward the second direction A2, the first locking surface 513 of the first rack 51 and the second locking surface 523 of the second rack 52 contact each other. The two locking surfaces are designed to be flat and fit each other. When they 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 in meshing state and relatively fixed, thereby effectively preventing the lifting platform 3 from descending, thereby realizing the self-locking function.

[0025] The design of the first gentle slope 512 and the second gentle slope 522 allows the first rack 51 and the second rack 52 to disengage 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 contact each other, they can form a tight fit and provide strong resistance to movement. This design ensures that when the lifting platform 3 is under load and has a downward trend, the self-locking structure can function reliably and effectively prevent the lifting platform 3 from accidentally descending.

[0026] Another function of the first gentle slope 512 and the second gentle slope 522 is to guide the first rack 51 when it is subjected to downward gravity, so that the first rack 51 and the second rack 52 can be engaged to the best position, thereby making the locking more secure.

[0027] Furthermore, the first locking surface 513 and the second locking surface 523 are designed to be vertical. 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. Figures 4 to 5 shown.

[0028] The number of the first teeth 511 of the first rack 51 is 1 or more, for example, 5, 6, or 20, which can be locked more stably during the meshing process and enable the lifting platform 3 to bear a greater weight. The first teeth 511 on the first rack 51 are arranged opposite to the second teeth 521 of the second rack 52.

[0029] Specifically, Figures 2 to 4 As shown, a horizontal guide groove 21 is provided on the base 2, at least part of the one-way self-locking component 5 is provided 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 provided in the guide groove 21, the first rack 51 is connected to the slider 54 through the 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 make the first rack 51 and the second rack 52 in a meshing state.

[0030] The guide groove 21 on the base 2 provides a specific running track for the one-way self-locking component 5. When the device is in the initial state or the lifting platform 3 is stationary, the first elastic component 53 plays a role, and the elastic force generated by it pushes the first rack 51 downward, so that the first rack 51 and the second rack 52 fixed on the lower wall 211 of the guide groove 21 remain in a meshing state, thereby maintaining the locking of the lifting platform 3. When the driving shaft assembly 42 is driven to move upward, the first gentle slope 512 of the first rack 51 and the second gentle slope 522 of the second rack 52 contact each other, and the component force generated by the contact between the two further causes the first rack 51 to disengage relative to the second rack 52, and the first elastic component 53 is compressed. The elastic force is temporarily unable to maintain the tight engagement between the first rack 51 and the second rack 52, and the first rack 51 moves together with the slider 54 in the guide groove 21, and the scissors assembly 4 is unfolded to realize the lifting of the lifting platform 3. After the driving shaft assembly 42 stops rising, the first elastic component 53 can be quickly reset, thereby causing the first rack 51 to recover downward and engage with the second rack 52, thereby realizing the self-locking of the lifting platform 3.

[0031] Specifically, Figure 3 to Figure 4 As shown, the first elastic component 53 includes a compression spring 531 and at least two guide rods 532. The guide rod 532 is fixedly connected to the slider 54. A guide hole 524 is opened on the first rack 51. The guide rod 532 slides with the guide hole 524, and the compression spring 531 is sleeved on the guide rod 532 so that the first rack 51 is parallel to the second rack 52 when displaced.

[0032] The sliding fit between at least two guide rods 532 and the guide holes 524 provides precise guiding for the movement of the first rack 51, ensuring that the first rack 51 always remains parallel to the second rack 52 regardless of whether the first rack 51 is rising to disengage or falling to reengage.

[0033] When the first rack 51 is disengaged from the second rack 52, or when the first rack 51 is meshed with the second rack 52, all the first teeth 511 synchronously contact the second teeth 521 or are disengaged from the second teeth 521, which not only avoids problems such as jamming and wear caused by rack tilt, extends the service life of the rack, but also ensures the smoothness and stability of the self-locking and unlocking process.

[0034] In the present application, two guide rods 532 are provided.

[0035] Specifically, Figure 1 to Figure 2 As shown, the driving shaft assembly 42 includes a rotating shaft 421 and a first supporting wheel 422 rotatably disposed on the rotating shaft 421 , and the rotating shaft 421 is rotatably connected to the intersection of the two scissor parts 41 .

[0036] When the drive shaft assembly 42 is rising or falling, the drive shaft assembly 42 not only changes in height, but also changes in horizontal plane. The first support wheel 422 is provided so that during the lifting process of the driving shaft assembly 42, the first support wheel 422 can be subjected to frictional contact, which is converted into a smaller rolling friction force, rather than directly contacting the rotating shaft 421, so that the movement is smoother.

[0037] Specifically, Figure 1 to Figure 2 As 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 disposed on the support rod 431 and are spaced apart.

[0038] The rotation setting of the second support wheel 432 converts the larger friction force originally generated when the support rod 431 slides with other components into a smaller rolling friction force, so that the first rod group 43 can slide more smoothly relative to the base 2 or other components, reducing power loss and ensuring that the lifting platform 3 is smooth and efficient in the ascent and descent process.

[0039] Specifically, Figure 1 to Figure 2 As shown, it also includes a manual unlocking device 6, which includes a rod body 61 and at least one pull rod 62. The rod body 61 is arranged below the support rod 431, and the pull rod 62 is fixedly 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 so that the first rack 51 is disengaged from the second rack 52.

[0040] When 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 the two second support wheels 432 and is in contact with the bottom 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 is disengaged from the second rack 52, and the lifting platform 3 can descend under the action of gravity or other external forces.

[0041] The gap between the rod body 61 and the support rod 431 and the two second support wheels 432 ensures that there is no mechanical interference when the second support wheels 432 slide. 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 is against the base. When the pull rod 62 is rotated, the rod body 61 can be driven to move up and down along the thread direction, and unlocking is achieved when the rod body 61 is raised to a predetermined position.

[0042] Specifically, Figure 1 to Figure 2 As shown, a handle 621 is provided on the top of the pull rod 62 .

[0043] The setting of the handle 621 provides the operator with a more comfortable and easier-to-grip force point. 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 emergency situations where quick unlocking is required. It can greatly improve the convenience of operation and make the manual unlocking operation smoother and more efficient.

[0044] like Figures 6 to 8 As 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 driving shaft group 42 of the self-locking lifting platform 100, and can drive the driving shaft group 42 to rise and fall to control the lifting platform 3 to rise and fall; 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, 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.

[0045] In this lifting production line, the power station 7 plays the role of core driving and control. When it is necessary to control the self-locking lifting platform 100 to work, the driving component 71 of the power station 7 starts to operate. The driving component 71 corresponds precisely to the driving shaft group 42 of the self-locking lifting platform 100, and drives the driving shaft group 42 to perform lifting actions by outputting power. When the driving component 71 outputs an upward driving force, the driving shaft group 42 rises accordingly. Since the driving shaft group 42 is rotationally connected to the scissors assembly 4, this rising action will drive the scissors assembly 4 to unfold, and then push the lifting platform 3 upward to realize the rising transportation of goods or personnel.

[0046] When the lifting platform 3 needs to be lowered, 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 platform 100, and drives the first rod group 43 to rise by applying an upward force. As the first rod group 43 rises, the first rack 51 connected to the first rod group 43 also rises synchronously, and the first rack 51 is disengaged from the second rack 52. After the lock is released, the lifting platform 3 starts to descend under the action of gravity or an additional downward external force, completing a complete descending transportation process.

[0047] One power station 7 can correspond to multiple self-locking lifting platforms 100. Compared with each self-locking lifting platform 100 being equipped with an independent power source, the purchase cost of power equipment is greatly reduced. For example, in a production line with 60 self-locking lifting platforms 100, if a single power source configuration is adopted, the purchase cost of the power station 7 equipment alone can save a lot of money. At the same time, the centralized design of the power station 7 makes wiring, installation and debugging easier, further reducing the overall installation cost and subsequent maintenance cost. The power station 7 is centrally set up, and there is no need to reserve power equipment installation space at each self-locking lifting platform 100, saving a lot of production space. The power station 7 is set separately from the self-locking lifting platform 100, which can greatly reduce costs.

[0048] Specifically, Figures 6 to 8 As shown, the driving assembly 71 includes a first driver 711, a first driving arm 712, a first lifting frame 713, and a first fixed frame 714. The first lifting frame 713 is slidably connected to the first fixed frame 714 and can be adjusted in height. A horizontal first adjusting 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 on the free end of the first driving arm 712. The first driving wheel 7121 is arranged in the first adjusting groove 7131 and can move in the first adjusting groove 7131; wherein, 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, and the driving 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.

[0049] When the power station 7 receives the command to control the self-locking lifting platform 100 to rise, the first driver 711 is started. When the first driving arm 712 rotates upward, the first driving wheel 7121 rises accordingly, pushing the first adjusting slot 7131 to make the first lifting frame 713 slide upward along the first fixed frame 714, thereby realizing the increase of the plane height position of the first lifting frame 713, and the driving 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 driving shaft group 42 also rises synchronously. Because the driving shaft group 42 is rotationally connected to the scissors assembly 4, the rise of the driving shaft group 42 drives the scissors assembly 4 to unfold, and finally realizes the rise of the lifting platform 3.

[0050] When it is necessary to control the self-locking lifting platform 100 to descend, the first driver 711 runs in the reverse direction, driving the first driving arm 712 to rotate in the reverse direction, and the first driving wheel 7121 moves downward in the first adjusting slot 7131, pulling the first adjusting slot 7131 to make the first lifting frame 713 slide downward along the first fixed frame 714, and the driving shaft group 42 descends accordingly, the scissor assembly 4 contracts, and the lifting platform 3 descends. At the same time, since the driving shaft group 42 can roll relative to the plane of the first lifting frame 713, during the ascent or descent of the first lifting frame 713, the driving shaft group 42 can flexibly adjust its position to adapt to the movement changes during the entire lifting process, ensuring the smooth progress of the lifting action. Of course, this process requires the unlocking assembly 72 to unlock the one-way self-locking assembly 5. In the case of unlocking, even if the driving shaft group 42 descends, the lifting platform 3 will not descend.

[0051] Further, such as Figure 7 As shown, the first driver 711 includes a first servo motor 7111 and a first reducer 7112 , and the first servo motor 7111 is connected to the first driving arm 712 via the first reducer 7112 .

[0052] Specifically, Figures 6 to 8 As shown, the unlocking assembly 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, and a horizontal second adjusting slot 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 on the free end of the second driving arm 722, and the second driving wheel is provided in the second adjusting slot and can move in the second adjusting slot; the adjusting frame 725 is provided in the second fixing frame 724 and can be adjusted in height. A second elastic member 726 is provided on the lifting frame 723 and between the adjusting frame 725 and the second lifting frame 723, wherein the second driving arm 722 rotates and drives the second driving wheel to change its position in height, so that the plane height position of the adjusting frame 725 changes, and 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; wherein the first rod group 43 moves upward to 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.

[0053] When the power station 7 receives the unlocking instruction, the second driver 721 is started, and the second driver 721 drives the second driving arm 722 connected thereto to start rotating. As the second driving arm 722 rotates, the position of the second driving wheel rotatably arranged on the free end thereof 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 rising process of the second lifting frame 723, the second lifting frame 723 is connected to the second lifting frame 723. The connected adjustment frame 725 also rises synchronously, because a second elastic member 726 is provided between the adjustment frame 725 and the second lifting frame 723, and the second elastic member 726 will be gradually compressed during the rising process. When the adjustment frame 725 rises, its plane abuts against the first rod group 43 and pushes the first rod group 43 to move upward. Since the planes of the first rod group 43 and the adjustment frame 725 can roll relative to each other, this process is smooth and stable. As the first rod group 43 moves upward, the first rack 51 connected thereto also moves upward, and the first rack 51 meshes with the second rack 52. When the first rack 51 is completely separated from the second rack 52, there is still a compressed space between the adjustment frame 725 and the second fixing frame 724, which ensures that even if some unexpected situations occur during the unlocking process, such as instantaneous impact force, the second elastic member 726 can still play a buffering role and maintain the stability of the unlocking state.

[0054] When it is necessary to restore the locked state, the second driver 721 runs in the reverse direction, driving the second driving arm 722 to rotate in the reverse direction, and the second driving wheel moves downward in the second adjusting slot, pulling the second adjusting slot to make the second lifting frame 723 slide downward along the first fixed frame 714, and the adjusting frame 725 descends accordingly. The first rod group 43 returns to the initial position under the action of gravity, and the first rack 51 re-engages with the second rack 52 to achieve the locking of the self-locking lifting platform 100.

[0055] Further, such as Figure 7 As shown, the second driver 721 includes a second servo motor 7211 and a second reducer 7212 , and the second servo motor 7211 is connected to the second driving arm 722 via the second reducer 7212 .

[0056] Further, such as Figure 7 As 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.

[0057] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship and movement status of the components in a certain specific posture, as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0058] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0060] The specific embodiments described herein are merely examples of the present invention. A person skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner without departing from the present invention or exceeding the scope defined by the appended claims.

Claims

1. A self-locking lifting platform, characterized in that: include: A base (2), a lifting platform (3), and a scissor assembly (4) connecting the two, the scissor assembly (4) comprising two groups of scissor parts (41) arranged opposite to each other and a drive shaft group (42), the drive shaft group (42) being connected to the intersection of the two scissor parts (41); the scissor assembly (4) comprising a first rod group (43) sliding relative to the base (2), a first end (44) pivotally connected to the base (2), a second rod group (45) sliding 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) comprises a first rack (51) rotatably connected to the first rod group (43) and a second rack (52) fixed to the base (2); When the drive shaft assembly (42) is driven upward, the first rack (51) and the second rack (52) are automatically disengaged and move in a first direction A1, so that the lifting platform (3) is lifted; when the drive shaft assembly (42) has a downward trend, the first rack (51) and the second rack (52) are engaged and self-locked and restricted from moving in a second direction A2, so as to restrict the lifting platform (3) from descending; when the first rod assembly (43) is driven upward, the first rack (51) and the second rack (52) are disengaged, so that the lifting platform (3) can descend.

2. The self-locking lifting platform 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 gently inclined surface (512) and a first locking surface (513), and the second rack (52) has a plurality of second teeth (521), the second tooth (521) has a second gently inclined surface (522) and a second locking surface (523); when the first rack (51) is capable of moving toward a first direction A1, the first gently inclined surface (512) contacts the second gently inclined surface (522), so that the first rack (51) is disengaged and slides relative to the second rack (52); when the first rack (51) moves toward a 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 in engagement and are relatively fixed.

3. The self-locking lifting platform according to claim 1, characterized in that: The base (2) is provided with a horizontal guide groove (21), at least part of the one-way self-locking component (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) via the 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 put the first rack (51) and the second rack (52) in a meshing state.

4. The self-locking lifting platform according to claim 3, characterized in that: The first elastic component (53) comprises a compression spring (531) and at least two guide rods (532), wherein the guide rods (532) are fixedly connected to the slider (54), a guide hole (524) is provided on the first rack (51), the guide rod (532) and the guide hole (524) are slidably matched, and the compression spring (531) is sleeved on the guide rod (532), so that the first rack (51) and the second rack (52) are parallel to each other when displacing.

5. The self-locking lifting platform according to claim 1, characterized in that: The driving shaft assembly (42) comprises a rotating shaft (421) and a first supporting wheel (422) rotatably arranged on the rotating shaft (421); the rotating shaft (421) is rotatably connected to the intersection of the two scissor parts (41).

6. The self-locking lifting platform according to claim 1, characterized in that: The first rod group (43) comprises 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 arranged at intervals.

7. The self-locking lifting platform according to claim 6, characterized in that: The invention also comprises a manual unlocking device (6), the manual unlocking device (6) comprising a rod body (61) and at least one pull rod (62), the rod body (61) being arranged below the support rod (431), the pull rod (62) being fixedly connected to the rod body (61), and the rod body (61) being located between two second support wheels (432); wherein the rod body (61) can drive the first rod group (43) to move upwards, so that the first rack (51) is disengaged from the second rack (52).

8. A lifting production line, characterized in that: include: At least one self-locking lifting platform (100) according to any one of claims 1 to 7 capable of moving in a predetermined direction; A power station (7), the power station (7) corresponding to one of the self-locking lifting platforms (100), the power station (7) comprising an unlocking component (72) and a driving component (71), the driving component (71) corresponding to the driving shaft group (42) of the self-locking lifting platform (100), and capable of driving the driving shaft group (42) to rise and fall, so as to control the lifting platform (3) to rise and fall; the unlocking component (72) corresponding to the first rod group (43) of the self-locking lifting platform (100), and capable of driving the first rod group (43) to rise, the unlocking component (72) being used to separate and release the meshing of the first rack (51) and the second rack (52), so as to enable the lifting platform (3) to descend.

9. The lifting production line according to claim 8, characterized in that: The driving assembly (71) comprises a first driver (711), a first driving arm (712), a first lifting frame (713), and a first fixed frame (714); the first lifting frame (713) is slidably connected to the first fixed frame (714) and can be adjusted in height; a horizontal first adjustment slot (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 on the free end of the first driving arm (712); the first driving wheel (7121) is arranged in the first adjustment slot (7131) and can move in the first adjustment slot (7131); wherein 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 driving 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).

10. The lifting production line according to claim 9, characterized in that: The unlocking assembly (72) comprises 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, and a horizontal second adjusting slot 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 on the free end of the second driving arm (722), and the second driving wheel is arranged in the second adjusting slot and can move in the second adjusting slot; the adjusting frame (725) is liftably arranged on the second lifting frame (723), and a second elastic member (726) is arranged between the adjustment frame (725) and the second lifting frame (723), wherein the second driving arm (722) rotates and drives the second driving wheel to change its position in height, so that the plane height position of the adjustment frame (725) changes, and 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 the first rod group (43) moves upward to 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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