A load platform with a two-way locking device

Abstract

The present invention discloses a load platform with a two-way locking device, the two-way locking device comprising: a fixed component, comprising a fixed rack, the fixed rack having first teeth arranged in a vertical direction; a movable component, comprising a first wedge block, having second teeth arranged in a vertical direction, the first wedge block being wedge-shaped on the side opposite to the second teeth, having a first inclined surface, and the first inclined surface having a first angle with the longitudinal plane; a transmission component, comprising a second wedge block, the second wedge block having a second inclined surface, the second inclined surface being in contact with the first inclined surface; a driving component, comprising a hydraulic cylinder, the hydraulic cylinder being connected to the transmission component, the hydraulic cylinder being able to drive the second wedge block to move in a horizontal longitudinal direction, thereby driving the first wedge block to move in a horizontal transverse direction, so that the second teeth of the first wedge block engage with the first teeth of the fixed rack, thereby realizing two-way locking of the load platform.

Description

Technical Field

[0001] The present invention relates to the field of load-bearing technology, in particular to a load-bearing platform with a bidirectional locking device. Background Art

[0002] Existing locking devices mainly drive the locking device through a power source, and use special mechanical structures or generate large friction forces to lock the device to be locked. After locking, the self-locking design or the provision of large pressure is used to maintain the locked state. The above-mentioned locking devices are mainly used to lock equipment whose main body is stationary or in a simple periodic motion state, and the locked device will no longer change after locking. However, for large equipment that moves irregularly and is subject to external forces, such as large load platforms, mainstream locking devices are difficult to adapt to the locking needs of equipment with irregular motion, and maintaining the locked state when external forces act will cause the external force to be transmitted to the locked device itself, affecting the normal operation of the locked device. Summary of the Invention

[0003] In response to the above-mentioned shortcomings or improvement needs of the prior art, the present invention provides a load platform with a bidirectional locking device, which provides a locking method for large heavy-load equipment under irregular movement, thereby achieving bidirectional locking of the equipment. To achieve the above-mentioned purpose, the present invention adopts the following technical solutions.

[0004] In some embodiments, a load platform with a bidirectional locking device is provided, wherein the load platform includes a bidirectional locking device, and the bidirectional locking device includes:

[0005] A fixing assembly, comprising a fixing rack having first teeth arranged in a vertical direction;

[0006] The movable assembly includes a first wedge block, the first wedge block is arranged opposite to the fixed assembly, and has second teeth arranged in a vertical direction. The side of the first wedge block opposite to the second teeth is wedge-shaped and has a first inclined surface. The first inclined surface forms a first angle with the longitudinal plane.

[0007] The transmission assembly includes a second wedge block, the second wedge block is arranged opposite to the first wedge block, the second wedge block has a second inclined surface, and the second inclined surface contacts and cooperates with the first inclined surface;

[0008] a drive assembly, comprising a hydraulic cylinder connected to the transmission assembly, wherein the hydraulic cylinder is movable in a horizontal longitudinal direction and can drive the second wedge block to move in the horizontal longitudinal direction, thereby driving the first wedge block to move in the horizontal transverse direction, so that the second teeth of the first wedge block engage with the first teeth of the fixed rack;

[0009] The vertical direction, the horizontal longitudinal direction and the horizontal transverse direction constitute orthogonal directions, the horizontal longitudinal direction is parallel to the longitudinal plane, the vertical direction is parallel to the longitudinal plane, and the horizontal transverse direction is perpendicular to the longitudinal plane.

[0010] In some embodiments, the transmission assembly also includes a transversely arranged T-block, the T-block is fixedly connected to the second wedge block, the first wedge block has a T-slot, and the T-block is inserted into the T-slot; the T-block has a connecting portion and an inclined portion, the connecting portion is along the horizontal transverse direction, and the inclined portion is arranged along the vertical direction, the connecting portion connects the second wedge block and the inclined portion, the inclined portion has a first inclined surface parallel to the first inclined surface, and the T-slot has a matching first inclined wall.

[0011] In some embodiments, the second wedge, the connecting portion and the inclined portion are integrally formed.

[0012] In some embodiments, the first angle between the first inclined surface of the first wedge and the longitudinal plane is 25-45°.

[0013] In some embodiments, the bidirectional locking device of the load platform also includes a box body and a cover plate, the box body is used to connect the load platform, the cover plate is installed on the box body, the plane where the cover plate is located is perpendicular to the horizontal longitudinal direction, and the hydraulic cylinder is fixedly connected to the cover plate.

[0014] In some embodiments, the hydraulic cylinder includes a piston rod, and the piston rod is connected to the second wedge block via a thread.

[0015] In some embodiments, the box body has a first guide groove arranged along the horizontal transverse direction and a second guide groove arranged along the horizontal longitudinal direction, the first wedge block has a first guide key extending along the horizontal transverse direction, the second wedge block has a second guide key extending along the horizontal longitudinal direction, the first guide key is located in the first guide groove, and the second guide key is located in the second guide groove.

[0016] In some embodiments, the first wedge block and the second wedge block are installed in the box body, and the box body has a through hole on a side opposite to the fixed rack, and the second tooth of the first wedge block can extend out of the through hole.

[0017] In some embodiments, a pressure sensor and a displacement sensor are provided in the hydraulic cylinder. The pressure sensor is used to monitor the pressure of two chambers of the hydraulic cylinder, and the displacement sensor is used to record the displacement of the piston rod of the hydraulic cylinder.

[0018] In some embodiments, the load platform has multiple groups of bidirectional locking devices, which are arranged side by side in the horizontal and longitudinal directions. Each group of bidirectional locking devices has two bidirectional locking devices, and the two bidirectional locking devices are used to be arranged on both sides of the load platform respectively.

[0019] Compared with the prior art, some embodiments of the present invention offer at least the following advantages: 1. The mechanical structure is compact and highly reliable. The locking device utilizes a hydraulic cylinder to drive a wedge-shaped structure inserted into a rack. This not only avoids the increased size of the hydraulic cylinder caused by the additional load associated with direct-drive locking, but also reduces the number of transmission chains and improves the reliability of the structure. 2. The present invention provides active and passive adaptive locking capabilities. The rack-shaped design enables the locking device to passively adapt to small movements of the locked device, while the provision of pressure and displacement sensors enables the locking device to actively adapt to the effects of excessive loads on the locked device. 3. The box-shaped structure facilitates overall installation and facilitates various connection methods. The locking device and its fixed structure can be adjusted according to the actual conditions of the device.

[0020] The present invention is suitable for locking equipment on large load platforms, achieving locking by injecting hydraulic oil into the locking device's hydraulic cylinder. Furthermore, the present invention is suitable for bidirectional locking requirements under unstable motion conditions of the locked equipment, and can achieve synchronous locking and adaptive unlocking and locking functions based on additional loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional schematic diagram of a bidirectional locking device according to an embodiment of the present invention, with part of the box structure removed.

[0022] Figure 2 This is a schematic structural diagram of a bidirectional locking device according to an embodiment of the present invention.

[0023] Figure 3 Schematic diagram of the structure of a fixed rack in one embodiment of the present invention.

[0024] Figure 4 Schematic diagram of the structure of the first wedge in one embodiment of the present invention.

[0025] Figure 5 Schematic diagram of a top view of a first wedge in one embodiment of the present invention.

[0026] Figure 6 for Figure 1 Schematic diagram of a top view of part of the structure of the two-way locking device.

[0027] Figure 7 for Figure 1 Schematic diagram of the front view of part of the structure of the two-way locking device.

[0028] Figure 8 for Figure 1 Schematic diagram of the left view of part of the structure of the two-way locking device.

[0029] Figure 9 It is a three-dimensional schematic diagram of the main structure of the box in one embodiment of the present invention.

[0030] Figure 10 for Figure 9 Schematic diagram of the right view of the main structure of the box.

[0031] Figure 11 for Figure 9 Schematic diagram of the three-dimensional structure of the main structure of the box.

[0032] Figure 12 Schematic diagram of the structure of a drive assembly according to an embodiment of the present invention.

[0033] Figure 13 This is a schematic structural diagram of a load platform with a bidirectional locking device according to an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] Bidirectional locking device 1000; first bidirectional locking device 1000a, second bidirectional locking device 1000b; load platform 2000, panel 2001;

[0036] Fixed assembly 100, fixed rack 101, first tooth 1011;

[0037] Movable assembly 200; first wedge 201, second tooth 2012, first inclined surface 2011; T-slot 202, first inclined wall 2021, second inclined wall 2022; first guide key 203, first upper guide key 203a, first lower guide key 203b;

[0038] Transmission assembly 300; second wedge 301, second inclined surface 3011; T-shaped block 302, connecting portion 3021, inclined portion 3022, first inclined surface 3023, second inclined surface 3024; second guide key 303; second upper guide key 303a, second lower guide key 303b; third guide key 304; third upper guide key 304a, third lower guide key 304b;

[0039] Drive assembly 400; hydraulic cylinder 401, piston rod 4011, housing boss 4012;

[0040] Pressure sensor 402, controller 403, displacement sensor 404;

[0041] Box body 500; box body main structure 5001, cover plate mounting surface 5002, first opening 5003, right side plate mounting surface 5004, second opening 5005, cover plate mounting threaded hole 5006, right side plate mounting threaded hole 5007;

[0042] Upper top plate 501, lower bottom plate 502, left side plate 503, back plate 504, front plate 505, right side plate 506, through hole 5061;

[0043] First guide grooves 507, 507a, 507b, second guide grooves 508, 508a, 508b, and third guide grooves 509, 509a, 509b;

[0044] Cover plate 600. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The interpretation of such words should be made from the perspective of those skilled in the art. For example, "above..." and "below..." should be understood as the positional relationship of the main structure or structure of the component, etc. in the initial state, which may break through the above positional relationship during movement. "...disposed on..." should be understood as the approximate connection relationship of the components, rather than necessarily being above.

[0047] In the present invention, unless otherwise expressly defined or limited, the terms "disposed," "installed," "connected," "connected," "fixed," etc. should be understood broadly from the perspective of those skilled in the art. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two elements or interaction between two elements, unless otherwise expressly defined. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0048] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0049] like Figure 1-2 As shown, Figure 1 This is a three-dimensional schematic diagram of a bidirectional locking device according to an embodiment of the present invention, with part of the box structure removed. Figure 2 The present invention is a schematic structural diagram of a bidirectional locking device with a box structure according to an embodiment of the present invention. The bidirectional locking device 1000 includes: a fixed component 100, a movable component 200, a transmission component 300, and a drive component 400. In some embodiments, the fixed component 100 can be fixed to the ground. Of course, the fixed component can also be fixed to other locations, such as to a certain position via a fixing device or other intermediate component, as long as the position of the fixing component itself is guaranteed to be fixed. The end of the bidirectional locking device 1000 away from the fixed component can be fixedly connected to the locked device, such as a load platform. The load platform is a platform that can carry a certain load. Of course, in the embodiment of the present application, the load platform is a heavy-duty platform, and the load platform may also have some unstable loads, and the load platform itself may have some slight vibrations. The drive component 400 is used to drive the transmission component 300 to move. The transmission component 300 drives the movable component 200 to lock or unlock the movable component and the fixed component 100, thereby locking or unlocking the load platform.

[0050] In some embodiments, the bidirectional locking device further comprises a box body 500 and a cover plate 600. The cover plate 600 and the box body 500 are used to realize the overall packaging of the bidirectional locking device. In some embodiments, the box body 500 is used to connect the load platform, the cover plate 600 is installed on the box body 500, the plane where the cover plate 600 is located is perpendicular to the horizontal longitudinal direction, and the drive assembly 400 is fixedly connected to the cover plate 600. For the convenience of description, refer to Figure 1, the three directions of the orthogonal coordinate system O-XYZ are defined as the horizontal transverse direction (X direction), the horizontal longitudinal direction (Y direction), and the vertical direction (Z direction). The plane parallel to the horizontal transverse direction and the horizontal longitudinal direction is the horizontal plane (O-XY plane), the plane parallel to the horizontal transverse direction and the vertical direction is the transverse plane (O-XZ plane), and the plane parallel to the horizontal longitudinal direction and the vertical direction is the longitudinal plane (O-YZ plane). The vertical direction, the horizontal longitudinal direction, and the horizontal transverse direction constitute orthogonal directions. The horizontal longitudinal direction is parallel to the longitudinal plane, the vertical direction is parallel to the longitudinal plane, and the horizontal transverse direction is perpendicular to the longitudinal plane.

[0051] refer to Figure 3 As shown, Figure 3 Schematic diagram of the structure of a fixed rack in one embodiment of the present invention. Figure 3 (a) is a front (horizontal longitudinal) view of the fixed rack, and (b) is a perspective view of the fixed rack. In some embodiments, the fixed assembly 100 includes a fixed rack 101 having a plurality of first teeth 1011 arranged vertically. The first teeth 1011 have an upper tooth surface 1012, a lower tooth surface 1013, and a tooth tip surface 1014. The angles between the upper tooth surface 1012 and the lower tooth surface 1013 and the horizontal are upper angle δ1 and lower angle δ2, respectively.

[0052] refer to Figure 4-5 As shown, Figure 4 Schematic diagram of the structure of the first wedge in one embodiment of the present invention. Figure 5 This is a schematic diagram of a top view of a first wedge block in one embodiment of the present invention. The movable assembly 200 includes a first wedge block 201, which is positioned opposite the fixed assembly 100 and has a plurality of second teeth 2012 arranged vertically. The shape of the second teeth 2012 matches the shape of the first teeth 1011. The side of the first wedge block 201, facing away from the second teeth, is wedge-shaped and has a first inclined surface 2011. The first inclined surface 2011 forms a first angle β with the longitudinal plane.

[0053] refer to Figure 6 As shown, Figure 6 for Figure 1 Schematic diagram of a partial structure of a bidirectional locking device in a top view (vertically downward). Transmission assembly 300 includes a second wedge block 301, which is disposed opposite first wedge block 201. Second wedge block 301 has a second inclined surface 3011, which contacts and mates with first inclined surface 2011. Second inclined surface 3011 forms a second angle with the longitudinal plane, which is equal to first angle β.

[0054] refer to Figure 2 and Figure 6As shown, the drive assembly 400 includes a hydraulic cylinder 401, which is connected to the transmission assembly 300 and fixedly connected to the cover plate 600. The hydraulic cylinder 401 is movable in a horizontal longitudinal direction. The hydraulic cylinder 401 can drive the second wedge 301 to move in the horizontal longitudinal direction, thereby driving the first wedge 201 to move in the horizontal transverse direction, so that the second tooth 2012 of the first wedge 201 engages or disengages with the first tooth 1011 of the fixed rack 101. In an embodiment of the present application, when the second tooth 2012 is engaged with the first tooth 1011 of the fixed rack 101, by continuously supplying oil to the hydraulic cylinder 401, the bidirectional locking device can simultaneously achieve locking in the horizontal transverse and vertical directions, wherein the horizontal transverse and vertical directions are locking directions. Moreover, in an embodiment of the present application, the driving direction of the hydraulic cylinder is perpendicular to the locking direction, which can further improve the reliability of transmission and locking and reduce the additional load impact brought to the drive assembly by the load platform.

[0055] In the embodiments of the present application, the bidirectional locking device uses a hydraulic cylinder as a driving component, a first wedge block as a transmission component, a second wedge block as a movable component, and a fixed rack as a fixed part. The mechanical structure is small in size and has high reliability. The bidirectional locking device uses a hydraulic cylinder to drive the first wedge block and the second wedge block of the wedge structure, so that the second tooth is inserted into the first tooth of the rack. This not only avoids the increase in the size of the hydraulic cylinder caused by the additional load brought by direct drive locking, but also has a small transmission chain and a mature structure, thereby improving the reliability of the structure. In some embodiments of the present application, the bidirectional locking device adopts a box structure that is easy to install as a whole and provides convenience for various connection forms. The locking device and its fixed structure can be adjusted according to the actual situation of the locked equipment.

[0056] refer to Figures 1-6As shown, in some embodiments, the transmission assembly 300 further includes a transversely disposed T-shaped block 302, which is fixedly connected to the second wedge block 301. The first wedge block 201 has a T-shaped slot 202, into which the T-shaped block 302 is inserted. The T-shaped block 302 has a connecting portion 3021 and an inclined portion 3022. The connecting portion 3021 is disposed horizontally and transversely, while the inclined portion 3022 is disposed vertically. The connecting portion 3021 connects the second wedge block 301 and the inclined portion 3022. The inclined portion 3022 has a first inclined surface 3023 that is parallel to the first inclined surface 2011 and the second inclined surface 3011. The T-shaped slot 202 has a matching first inclined wall 2021. The first inclined surface 3023 is the surface of the inclined portion 3022 facing away from the fixed rack 101, and the first inclined wall 2021 is the surface of the T-shaped slot 202 that is closer to the second wedge block 301. When unlocked, the first inclined surface 3023 contacts the first inclined wall 2021. In some embodiments, the T-slot 202 further includes a second inclined wall 2022, which is parallel to the first inclined wall 2021. Accordingly, the inclined portion 3022 of the T-block 302 includes a second inclined surface 3024. The first and second inclined surfaces 3023 and 3024 fully align with the first and second inclined walls 2021 and 2022 of the T-slot 202, while also serving as guides. This allows for locking and unlocking functions in a limited space without adding any additional structural elements.

[0057] In the embodiment of the present application, the bidirectional locking device employs a structure in which a T-shaped block is inserted into the T-shaped slot, thereby achieving unlocking of the bidirectional locking device. When unlocking is required, the hydraulic cylinder 401 drives the second wedge block 301 to move toward the hydraulic cylinder 401. The first inclined surface 3023 of the T-shaped block contacts the first inclined wall 2021 of the T-shaped slot 202, driving the first wedge block 201 away from the fixed rack, thereby disengaging the second tooth 2012 from the first tooth 1011 of the fixed rack 101, thereby achieving unlocking.

[0058] In some embodiments, the second wedge 301, connecting portion 3021, and inclined portion 3022 are integrally formed. It should be understood that "integrated" means that there are no additional connecting components between the second wedge 301, connecting portion 3021, and inclined portion 3022; the three are directly integrally formed. This integral formation of the second wedge 301, connecting portion 3021, and inclined portion 3022 provides a simple structure and high connection strength, ensuring transmission reliability.

[0059] In some embodiments, the first angle β between the first inclined surface 2011 of the first wedge 201 and the longitudinal plane is 25-45 degrees. Setting the first angle β to 25-45 degrees facilitates the hydraulic cylinder driving the second wedge in the horizontal longitudinal direction during the locking operation, ensuring transmission stability while also providing stronger and more robust horizontal locking. This also reduces the impact of the reaction force of the additional load on the hydraulic cylinder.

[0060] In some embodiments, the upper angle δ1 and the lower angle δ2 of the first tooth 1012 are both less than 45°, which can effectively lock in the vertical direction, ensure the locking effect, and on the reaction force transmission path, the reaction force along the horizontal lateral direction is small. Preferably, the upper angle δ1 and the lower angle δ2 are both less than 30°, and more preferably, the range of the upper angle δ1 and the lower angle δ2 is 20-30°. The range of the upper angle δ1 and the lower angle δ2 is 20-30°, which can not only ensure the locking effect, but also ensure that the two-way locking device adapts to the small movements of the locked device. In some embodiments, the upper tooth surface 1012 and the lower tooth surface 1013 are symmetrically arranged along the horizontal plane, that is, the upper angle δ1 and the lower angle δ2 are equal, which is convenient for processing and symmetrical in force. Of course, in some preferred embodiments, the upper angle δ1 and the lower angle δ2 are not equal. For example, when the load platform is subjected to a large upward force in the vertical direction, the upper angle δ1 and the lower angle δ2 can be set to δ1>δ2. This allows the lower tooth surface 1013, which is subjected to a larger impact, to bear more of the vertical force, reducing the horizontal reaction force and improving the load capacity of the bidirectional locking device. Of course, in other embodiments, when the load platform is subjected to a large downward force in the vertical direction, the upper angle δ1 and the lower angle δ2 can be set to δ1<δ2.

[0061] In some embodiments, the hydraulic cylinder 401 includes a piston rod 4011, which is directly and securely connected to the second wedge block 301 via threads. When the piston rod is extended, the second wedge block 301 can be driven to move away from the hydraulic cylinder; when the piston rod is retracted, the second wedge block 301 can be driven to move toward the hydraulic cylinder.

[0062] refer to Figures 6-11 As shown, in some embodiments, the box body 500 has a first guide groove arranged along the horizontal transverse direction and a second guide groove arranged along the horizontal longitudinal direction, the first wedge block 201 has a first guide key 203 extending along the horizontal transverse direction, the second wedge block 301 has a second guide key 303 extending along the horizontal longitudinal direction, the first guide key 203 is located in the first guide groove, and the second guide key 303 is located in the second guide groove.

[0063] Of course, in some embodiments, the first guide key and the second guide key may also be provided on the box body 500, and correspondingly, the first guide groove and the second guide groove may be provided on the first wedge 201 and the second wedge 301, respectively. In some embodiments, the first guide key and the second guide groove may also be provided on the box body 500, and correspondingly, the first guide groove and the second guide key may be provided on the first wedge 201 and the second wedge 301, respectively. The first guide groove and the second guide groove may also be provided on the box body 500, and correspondingly, the first guide key and the second guide key may be provided on the first wedge 201 and the second wedge 301, respectively. Among them, the first guide groove and the first guide key are provided in a horizontal transverse direction, and the second guide groove and the second guide key are provided in a horizontal longitudinal direction. The first guide key and the second guide key are both located on the box body or on the wedge, and the processing is simple. The first guide key and the second guide key are respectively provided on the box body and on the wedge, which can make the force more uniform and the transmission more stable.

[0064] In some embodiments, a first guide groove and a second guide groove are symmetrically disposed on the inner sides of the upper plate 501 and the lower plate 502 of the box 500. That is, the first guide groove and the second guide groove are located on both the upper plate and the lower plate of the box 500. Correspondingly, the first guide key and the second guide key are located on the upper and lower sides of the first wedge block 201 and the second wedge block 301. This symmetrical arrangement ensures more uniform force distribution and more stable transmission.

[0065] In some embodiments of the present application, it is preferred that the second wedge 301 has a second guide key 303 extending in the horizontal longitudinal direction, and the second wedge 301 also has a third guide key 304 extending in the horizontal longitudinal direction, and the third guide key 304 and the second guide key 303 are located on different surfaces of the second wedge 301. Specifically, there are two second guide keys 303, including a second upper guide key 303a and a second lower guide key 303b, which are respectively located on the upper side and lower side of the second wedge 301, and the upper side and the lower side are two opposite surfaces in the vertical direction. There are two third guide keys 304, including a third upper guide key 304a and a third lower guide key 304b, which are both located on the left side of the second wedge 301, and the left side is the surface facing away from the first wedge in the horizontal direction. The first wedge block 201 has a first guide key 203 extending horizontally. Specifically, the first guide key 203 has two, including a first upper guide key 203a and a first lower guide key 203b. The first upper guide key 203a and the first lower guide key 203b are respectively located on the upper side and the lower side of the first wedge block 201, and the upper side and the lower side are two opposite sides in the vertical direction.

[0066] Correspondingly, the box body 500 is provided with a first guide groove 507 that matches the first guide key 203, a second guide groove 508 that matches the second guide key 303, and a third guide groove 509 that matches the third guide key 304. Specifically, first guide grooves 507a and 507b are symmetrically provided on the inner sides of the upper top plate 501 and lower bottom plate 502 of the box body 500, and second guide grooves 508a and 508b are symmetrically provided on the inner sides of the upper top plate 501 and lower bottom plate 502 of the box body 500. The first guide groove and the second guide groove are located on both the upper top plate and the lower bottom plate of the box body 500. The left side plate 503 of the box body 500 is provided with upper and lower third guide grooves 509a and 509b. By simultaneously setting the second guide key 303, the second guide groove 508 and the third guide key 304, the third guide groove 509, the second wedge block can be accurately limited in the vertical direction and the horizontal direction, thereby ensuring the second wedge block's only degree of freedom in the horizontal longitudinal direction.

[0067] In this embodiment, specifically, the box body 500 includes an upper top plate 501 and a lower bottom plate 502, the upper top plate 501 and the lower bottom plate 502 being two surfaces facing each other in the vertical direction. The box body 500 also includes a left side plate 503, which is the surface facing away from the fixed rack 101 in the horizontal direction. In this embodiment, the box body 500 also includes a back plate 504 and a front plate 505, the back plate 504 is arranged opposite to the cover plate 600, and the front plate 505 and the cover plate 600 are located on the same surface of the box body. The total area of ​​the front plate 505 and the cover plate 600 is equal to the area of ​​the back plate 504. Specifically, the cover plate 600 is located on the side of the front plate 505 away from the fixed rack 101. The cover plate 600 is adjacent to the left side plate 503. The upper top plate 501, the lower bottom plate 502, the left side plate 503, the back plate 504 and the front plate 505 are integrally formed into the main box structure 5001. The upper top plate 501, the lower bottom plate 502, the left side plate 503, the back plate 504 and the front plate 505 are integrally fixed and cannot be disassembled. The main box structure 5001 is an integral non-detachable structure with high structural strength and high control reliability. Specifically, the upper top plate 501, the lower bottom plate 502, the left side plate 503, the back plate 504 and the front plate 505 can be integrally formed to form the main box structure 5001. Of course, the upper top plate 501, the lower bottom plate 502, the left side plate 503, the back plate 504 and the front plate 505 can also be integrally welded or partially welded to form the main box structure 5001. The main structure 5001 of the box body has a cover plate mounting surface 5002. The upper top plate 501, the lower bottom plate 502, and the end surface of the left side plate 503 facing the front plate 505 form the cover plate mounting surface 5002. The cover plate mounting surface 5002 has a cover plate mounting threaded hole 5006. There are multiple cover plate mounting threaded holes 5006. The center of the cover plate mounting surface 5002 has a first opening 5003, and the second wedge block 301 can be installed into the main structure 5001 of the box body through the first opening 5003. The cover plate 600 can be fixed to the cover plate mounting surface 5002 by screws. Specifically, the box body 500 also includes a right side plate 506, which is located on the surface opposite to the left side plate 503. The main structure 5001 of the box body also has a right side plate mounting surface 5004 and a right side plate mounting threaded hole 5007. The upper top plate 501, lower bottom plate 502, back plate 504, and front plate 505, near the end surface of the fixed rack, form a right side plate mounting surface 5004. Multiple right side plate mounting threaded holes 5007 are distributed across the right side plate mounting surface 5004. A second opening 5005 is defined in the center of the right side plate mounting surface, through which the first wedge block 201 can be installed into the main box structure 5001. The right side plate 506 is fixed to the right side plate mounting surface 5004 via screws. Specifically, the right side plate 506 has a through hole 5061, the size of which matches the overall size of the second tooth 2012. The second tooth 2012 of the first wedge block 201 can extend through the through hole 5061.The first wedge 201 and the second wedge 301 are mounted within the housing 500. A through-hole 5061 is defined on the side of the housing opposite the fixed rack. The second tooth 2012 of the first wedge 201 extends through the through-hole 5061, allowing it to engage with the first tooth 1011. During engagement, the tip of the second tooth 2012 inserts into the tooth groove of the first tooth 1011. The meshing of the first and second teeth 1011 and 2012 achieves vertical centering and locking. Furthermore, the rack-like design of the fixed rack enables the bidirectional locking device to passively adapt to small movements of the locked device.

[0068] Specifically, in some more preferred embodiments of the present application, the first guide grooves 507a and 507b respectively penetrate the side of the upper top plate 501 and the lower bottom plate 502 adjacent to the right side plate 506, i.e., the first guide grooves 507a and 507b extend to the right side plate mounting surface 5004 and communicate with the second opening 5005. The second guide grooves 508a and 508b respectively penetrate the side of the upper top plate 501 and the lower bottom plate 502 adjacent to the cover plate 600, i.e., the second guide grooves 508a and 508b extend to the cover plate mounting surface 5002 and communicate with the first opening 5003. The third guide grooves 509a and 509b both penetrate the side of the left side plate 503 adjacent to the cover plate 600, i.e., the third guide grooves 509a and 509b extend to the cover plate mounting surface 5002 and communicate with the first opening 5003. During installation, the first wedge 201 can be placed into the main box structure 5001 along the first guide groove 507 from the second opening 5005. The second wedge 301 can then be placed into the main box structure 5001 along the second guide groove 508 and the third guide groove 509 from the first opening 5003. The T-shaped block 302 connected to the second wedge 301 is then inserted into the T-shaped slot 202 of the first wedge 201. The right side plate 506 and the cover plate 600 are then fixed to the main box structure 5001 with screws. Using the box structure of this embodiment of the present application, the transmission assembly and movable assembly are adapted to the shape of the main box structure 5001 and are directly connected and guided. This simplifies processing, increases box strength, ensures stable transmission, is easy to install, and provides excellent locking / unlocking effects.

[0069] In some embodiments, the cover plate 600 has a drive hole, through which the piston rod 4011 of the hydraulic cylinder 401 passes, threadedly connected to the second wedge 301. The hydraulic cylinder housing can be directly secured to the cover plate 600 via screws. Specifically, the hydraulic cylinder has a housing boss 4012, which is secured to the cover plate 600 via screws. Once the right side panel 506, the main housing structure 5001, the cover plate 600, and the drive assembly are all installed and secured, the entire housing structure forms a high-strength and reliable operation. In some embodiments, the right side plate 506 is rectangular, the cover plate 600 is also rectangular, the first opening 5003 is rectangular, the second opening 5005 is rectangular, and the through hole 5061 is rectangular. A sealing structure is provided between the main structure 5001 of the box body and the right side plate 506 and the cover plate 600, a sealing structure is provided between the right side plate 506 and the movable component, and a sealing structure is provided between the cover plate 600 and the housing boss 4012, so that the box body structure is in a sealed state, preventing impurities and pollutants from entering the box body, ensuring smooth transmission, improving accuracy, and ensuring reliability. As for the form of the sealing structure, sealant or sealing strips can be directly used. Moreover, due to the use of an integral main structure 5001 of the box body, the box body structure is square and easy to seal.

[0070] refer to Figure 12 As shown, Figure 12 Schematic diagram of the structure of a drive assembly according to one embodiment of the present invention. In some embodiments, the hydraulic cylinder 401 includes a pressure sensor 402, which is disposed within the two chambers of the hydraulic cylinder. The pressure sensor 402 is used to monitor the pressure in the two chambers of the hydraulic cylinder 401 and to estimate the load force and preload force. In some embodiments, the drive assembly 400 further includes a controller 403, which is connected to the hydraulic cylinder 401 and the pressure sensor 402. The controller 403 transmits the pressure data from the pressure sensor to the controller, which controls the movement of the hydraulic cylinder to adapt to changes in the additional load.

[0071] In some embodiments, the hydraulic cylinder 401 further includes a displacement sensor 404, which is used to record the displacement of the piston rod 4011 within the hydraulic cylinder 401. The displacement sensor 404 is arranged on the piston rod or inside the cavity of the hydraulic cylinder, and the controller 403 is also connected to the displacement sensor 404. When multiple bidirectional locking devices are operating simultaneously, the displacement data of the displacement sensor 404 is transmitted to the controller 403 to control the displacement of the hydraulic cylinder, thereby achieving synchronous operation of multiple locking devices and ensuring the centering accuracy of the device after locking. In this embodiment, the drive assembly also includes a displacement sensor 404, a pressure sensor 402, and a controller 403. By simultaneously providing the displacement sensor 404 and the pressure sensor 402, the hydraulic cylinder is controlled to actively adapt to the impact of additional excessive loads on the locked device.

[0072] refer to Figure 13 As shown, Figure 13 The following is a schematic diagram of a load platform with a bidirectional locking device according to an embodiment of the present invention. In some embodiments, the load platform includes multiple sets of bidirectional locking devices, each of which is arranged side by side in a horizontal and longitudinal direction. Each set of bidirectional locking devices includes two bidirectional locking devices, including a first bidirectional locking device 1000a and a second bidirectional locking device 1000b. The two bidirectional locking devices are arranged on opposite sides of the load platform 2000.

[0073] In some embodiments of the present application, a load platform with a bidirectional locking device is further provided. The load platform includes a bidirectional locking device, and the bidirectional locking device can be the bidirectional locking device in any of the above embodiments.

[0074] In some embodiments, the load platform 2000 has a panel 2001 and multiple sets of bi-directional locking devices. Figure 13 As shown in FIG, there are two sets of two-way locking devices. Panel 2001 can carry large heavy objects. Multiple sets of two-way locking devices are arranged side by side in the horizontal and longitudinal directions. Each set of two-way locking devices has two two-way locking devices, including a first two-way locking device 1000a and a second two-way locking device 1000b. The two two-way locking devices are respectively arranged on opposite sides of the panel 2001 of the load platform. The two-way locking devices of the load platform can be arranged in multiple sets in the horizontal and longitudinal directions according to the load of the load platform. The arrangement position and arrangement form can be adaptively adjusted according to the size and structure of the load platform.

[0075] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A load platform with a bidirectional locking device, characterized in that: The load platform includes a panel and multiple sets of two-way locking devices, and the two-way locking devices include: A fixing assembly, comprising a fixing rack having first teeth arranged in a vertical direction; The movable assembly includes a first wedge block, the first wedge block is arranged opposite to the fixed assembly, and has second teeth arranged in a vertical direction. The side of the first wedge block opposite to the second teeth is wedge-shaped and has a first inclined surface. The first inclined surface forms a first angle with the longitudinal plane. The transmission assembly includes a second wedge block, the second wedge block is arranged opposite to the first wedge block, the second wedge block has a second inclined surface, and the second inclined surface contacts and cooperates with the first inclined surface; a drive assembly, comprising a hydraulic cylinder connected to the transmission assembly, wherein the hydraulic cylinder is movable in a horizontal longitudinal direction and can drive the second wedge block to move in the horizontal longitudinal direction, thereby driving the first wedge block to move in the horizontal transverse direction, so that the second teeth of the first wedge block engage with the first teeth of the fixed rack; Wherein, the vertical direction, the horizontal longitudinal direction and the horizontal transverse direction constitute orthogonal directions, the horizontal longitudinal direction is parallel to the longitudinal plane, the vertical direction is parallel to the longitudinal plane, and the horizontal transverse direction is perpendicular to the longitudinal plane; The transmission assembly also includes a transversely arranged T-block, the T-block is fixedly connected to the second wedge block, the first wedge block has a T-slot, the T-block is inserted into the T-slot; the T-block has a connecting portion and an inclined portion, the connecting portion is along the horizontal transverse direction, and the inclined portion is arranged along the vertical direction, the connecting portion connects the second wedge block and the inclined portion, the inclined portion has a first inclined surface parallel to the first inclined surface, and the T-slot has a matching first inclined wall.

2. The load platform according to claim 1, characterized in that: The second wedge block, the connecting portion and the inclined portion are integrally formed.

3. The load platform according to claim 1, characterized in that: A first included angle between the first inclined surface of the first wedge and the longitudinal plane is 25-45°.

4. The load platform according to claim 1, characterized in that: The bidirectional locking device of the load platform also includes a box body and a cover plate. The box body is used to connect the load platform. The cover plate is installed on the box body. The plane where the cover plate is located is perpendicular to the horizontal longitudinal direction. The hydraulic cylinder is fixedly connected to the cover plate.

5. The load platform according to claim 4, characterized in that: The hydraulic cylinder includes a piston rod, and the piston rod is connected to the second wedge block through a thread.

6. The load platform according to claim 4, characterized in that: The box body has a first guide groove arranged along the horizontal transverse direction and a second guide groove arranged along the horizontal longitudinal direction. The first wedge block has a first guide key extending along the horizontal transverse direction, and the second wedge block has a second guide key extending along the horizontal longitudinal direction. The first guide key is located in the first guide groove, and the second guide key is located in the second guide groove.

7. The load platform according to claim 4, characterized in that: The first wedge block and the second wedge block are installed in the box body. A through hole is provided on a side of the box body opposite to the fixed rack, and the second tooth of the first wedge block can extend out of the through hole.

8. The load platform according to claim 1, characterized in that: The hydraulic cylinder is provided with a pressure sensor and a displacement sensor. The pressure sensor is used to monitor the pressure of the two chambers of the hydraulic cylinder, and the displacement sensor is used to record the displacement of the piston rod of the hydraulic cylinder.

9. The load platform according to claim 1, characterized in that: A plurality of groups of bidirectional locking devices are arranged side by side in a horizontal longitudinal direction, and each group of bidirectional locking devices has two bidirectional locking devices, and the two bidirectional locking devices are used to be arranged on two sides of the panel of the load platform respectively and relatively.

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