A locking device for an elevator track

Abstract

The utility model relates to locking device technical field, specifically disclose a locking device of lift track, including locking seat and locking assembly, and locking seat is equipped with lock hole, locking assembly includes crossbeam frame, locking lever, sliding axle sleeve, the motor fixed in crossbeam frame, be equipped with the installation cavity in crossbeam frame, locking lever passes through sliding axle sleeve and is movably installed in the installation cavity, and the installation cavity extends to the end of crossbeam frame, and the installation cavity has the port to locking seat, and the motor drives locking lever along the installation cavity transverse motion, makes the end of locking lever from the port to extend to the plug -in in lock hole. The pre-alignment guide and accurate direction of locking lever through the installation cavity and sliding axle sleeve to locking lever, the simple lock hole design of collocation locking seat, reduce the alignment difficulty greatly, avoid the deviation, restrict the floating space strictly, inhibit the sinking or rebound caused by lift track load change from the root, guarantee EMS car group stable operation, utilize the installation cavity to locking lever effective protection simultaneously, structure integration and reliable.

Description

Technical Field

[0001] This utility model belongs to the technical field of locking devices, specifically relating to a locking device for a lifting track. Background Technology

[0002] The factory's vehicle production line uses an EMS (Electric Monorail System) conveyor line. The EMS line employs a sliding contact line power supply, offering high conveying efficiency and flexibility, but it requires high precision from hardware such as the tracks and sliding contact lines. Specifically, in the factory's door conveyor line production process, the EMS vehicles carrying doors and clamps need to move up and down via lifting tracks to transport doors between the ground assembly line and the overhead conveyor line. Once the lifting tracks are in position, they need to engage and lock with the fixed tracks.

[0003] To ensure reliable engagement between the lifting rail and the fixed rail, patent CN211283595U discloses a locking mechanism for a door line lifting platform rail. This mechanism involves a locking plate with a U-shaped notch on the fixed rail, and a motor and a first rotating arm on the movable rail. When engagement is required, the motor drives the first rotating arm to rotate, causing the locking wheel to engage or disengage from the U-shaped notch. While this design achieves engagement, the U-shaped notch, with its curvature and gaps, allows for significant movement of the locking wheel within the notch. Consequently, during EMS vehicle entry and exit from the lifting rail, load changes cause substantial sinking or rebound, compromising the engagement accuracy and strength between the lifting and fixed rails and resulting in a 5-7mm Z-axis step difference.

[0004] Patent CN218908749U also discloses a scheme using four sets of guide wheels to limit the four positions of a square positioning rod. In this scheme, the square positioning rod is mounted on a fixed track, and the four guide wheels are located on a lifting track. During locking, the square positioning rod must cause the guide wheels to roll and insert between the four guide wheels. However, the four guide wheels not only complicate the structure, but the cumulative installation errors caused by the dispersed positioning of multiple sets of guide wheels result in inconsistent assembly accuracy. This still leads to uncontrollable floating margins between the positioning rod and the four guide wheels in the locked state, causing significant sinking or rebound when the lifting track experiences load changes. Furthermore, the insertion process of the square positioning rod and the four guide wheels is prone to misalignment, increasing alignment difficulty, causing jamming, and affecting the engagement accuracy and efficiency between the lifting track and the fixed track.

[0005] In summary, the existing connection between the lifting rail and the fixed rail has problems such as difficulty in alignment and uncontrollable floating margin of the positioning rod, resulting in poor docking accuracy and strength. Consequently, even in the locked state, the lifting rail will still experience significant sinking and rebound, causing the carbon brushes on the EMS train to be unable to slide smoothly from the sliding contact line of the fixed rail to the sliding contact line of the lifting rail, resulting in carbon brush damage and the EMS train being unable to operate. Utility Model Content

[0006] This utility model provides a locking device for a lifting track, which solves the technical problem of poor engagement accuracy caused by difficulty in aligning the lifting track with the fixed track and large floating margin of the positioning rod.

[0007] The technical solution adopted in this utility model is as follows: This utility model provides a locking device for a lifting track, including a locking seat installed on a fixed track and a locking assembly installed on the lifting track. The locking seat has a locking hole. The locking assembly includes a crossbeam, a locking rod, a sliding bushing, and a motor fixed to the crossbeam. The crossbeam has an installation cavity. The locking rod is movably installed in the installation cavity through the sliding bushing. The installation cavity extends to the end of the crossbeam and has a port facing the locking seat. The motor drives the locking rod to move laterally along the installation cavity, so that the end of the locking rod extends from the port and is inserted into the locking hole.

[0008] In the locking device for the lifting track provided by this utility model, the locking rod is movably installed in the mounting cavity through the sliding bushing. Simultaneously, the mounting cavity extends to the end of the crossbeam frame and has a port facing the locking seat. Combined with the simple lock hole design on the locking seat, unnecessary assembly errors are reduced, resulting in high assembly accuracy. The mounting cavity and sliding bushing limit and guide the locking rod, preventing it from shifting. The simplified guide structure improves the smoothness of the locking rod's insertion. During the locking process between the lifting track and the fixed track, when the lifting track reaches its position, the mounting cavity... With the port facing the locking seat, pre-alignment between the locking rod and the locking seat can be achieved, reducing the difficulty of aligning the locking rod and the lock hole and avoiding misalignment between the locking rod and the lock hole. Based on this, with the guidance and limiting effect of the sliding bushing inside the crossbeam frame on the locking rod, combined with the motor driving the locking rod to move precisely laterally along the mounting cavity, the end of the locking rod extends from the port and is inserted into the lock hole, completing the final locking of the locking rod and the locking seat. Therefore, during the entire locking process, the alignment of the locking rod and the locking seat is easy, the movement of the locking rod is precisely controlled, and the locking accuracy is high. Furthermore, in the locked state, the locking lever and the locking hole are interlocked, allowing for a tight fit. This restricts and precisely controls the floating space of the locking lever, significantly enhancing the reliability of the locking mechanism. This effectively prevents the lifting rail from sinking or rebounding due to load changes at the source of locking, preventing step-off issues. It further ensures a smooth transition of the EMS train's carbon brushes between the sliding contact lines, maintaining the stability and continuity of the train's operation. This effectively avoids the risk of equipment damage and downtime caused by docking problems, improving docking accuracy and locking strength.

[0009] In addition, the installation cavity not only assists in the pre-alignment of the locking rod, reducing the difficulty of alignment, but also enables the concealed installation of the locking rod. The structure has a high degree of integration, saves space, and prevents the locking rod from being bumped, contaminated by dust, or corroded by the external environment. It also avoids problems such as movement jamming and decreased fit accuracy caused by external interference, indirectly ensuring the long-term stable operation of the lifting track and the fixed track after docking. It avoids chain problems such as loose docking and step difference caused by locking rod failure, improves the structural protection, movement reliability and alignment accuracy of the locking device, improves the reliability of plug-in locking, and reduces maintenance costs.

[0010] In summary, this utility model uses the mounting cavity and sliding bushing to pre-align and precisely guide the locking rod, combined with the simple locking hole design of the locking seat, which greatly reduces the difficulty of alignment and avoids deviation. The high-precision insertion and locking of the locking rod and the locking hole is achieved by motor drive, which strictly limits the floating space and suppresses the sinking or rebound caused by the load change of the lifting track from the root, ensuring the stable operation of the EMS train. At the same time, the mounting cavity effectively protects the locking rod, and the structure is integrated and reliable.

[0011] In a preferred embodiment, the locking seat includes a mounting plate and a positioning block protruding from the mounting plate. The mounting plate is vertically fixed to the end of the fixed track, the positioning block surrounds and forms the locking hole, and the locking rod is inserted into the inner side of the positioning block.

[0012] The locking seat is vertically fixed to the end of the fixed rail via an mounting plate. Combined with the design of the positioning block forming a locking hole that inserts into the inside of the locking rod, the vertically mounted mounting plate ensures strong engagement with the end of the fixed rail and provides a stable mounting reference for the positioning block, ensuring the alignment accuracy of the locking hole and the locking rod, avoiding misalignment caused by installation reference deviation, and improving docking accuracy. Furthermore, the insertion and engagement of the locking hole formed by the positioning block and the locking rod enhances the rigidity and stability of the locking mechanism. The positioning block effectively suppresses the movement space after the lifting rail is docked, increasing locking strength and effectively suppressing floating caused by load changes in the lifting rail, further ensuring stable docking between the lifting rail and the fixed rail and smooth operation of the EMS train.

[0013] In a preferred embodiment, the positioning block includes a first positioning block and a second positioning block arranged at intervals, wherein the gap between the first positioning block and the second positioning block along the circumference of the locking rod is smaller than the outer diameter of the locking rod.

[0014] The positioning blocks consist of a first positioning block and a second positioning block arranged at intervals, with the gap between them along the circumference of the locking rod being smaller than the outer diameter of the locking rod. On the one hand, the circumferential limiting of the two positioning blocks forms a constraint space that matches the locking rod, ensuring that the locking rod fits tightly against the inner walls of the two positioning blocks after insertion. This also prevents the locking rod from disengaging from the lock hole enclosed by the two blocks, eliminating the play present in existing locking structures and preventing the locking rod from wobbling within the lock hole. On the other hand, the interval between the first and second positioning blocks creates a gap between them. This reduces the frictional resistance during the insertion process of the locking rod and the positioning blocks without causing the locking rod to disengage, improving the smoothness of the locking process, reducing wear on the locking rod, preventing deformation of the locking rod, and ensuring the long-term stability of the lifting track after it is connected to the fixed track.

[0015] In a preferred embodiment, the positioning block is annular to enclose the circumferentially closed keyhole.

[0016] The positioning block forms a circumferentially closed locking hole in a ring shape. On one hand, this fully enclosed structure provides 360° coverage for the locking rod, ensuring a complete fit between the rod and the inner wall of the locking hole after insertion. This completely eliminates the radial play present in traditional non-enclosed locking structures, preventing the locking rod from shifting or wobbling within the locking hole. This avoids the risk of track discrepancies, carbon brush damage, and train downtime caused by low locking precision, ensuring long-term stable operation after the lifting and fixed tracks are connected. On the other hand, the circumferentially closed locking hole provides precise full-circumferential guidance for the locking rod, ensuring that it always inserts along a preset trajectory during lateral movement driven by the motor. This avoids alignment misalignment and jamming, ensuring efficient docking.

[0017] In a preferred embodiment, the end face of the positioning block is provided with a guide arc surface or guide slope extending toward the center of the lock hole.

[0018] By setting a guide arc or guide slope extending towards the center of the lock hole on the end face of the positioning block, a precise guiding path is provided for the insertion of the locking rod, allowing the locking rod to smoothly slide into the lock hole along the guide surface under the drive of the motor, thus improving docking efficiency. On the other hand, the gradual transition design of the guide arc or guide slope can buffer the impact force when the locking rod is inserted, avoiding component wear caused by hard contact. At the same time, the guiding action automatically corrects the slight offset of the locking rod, further improving the alignment accuracy, ensuring the accuracy of insertion, and guaranteeing the stability of the docking between the lifting rail and the fixed rail and the smooth operation of the EMS train.

[0019] In a preferred embodiment, the locking rod includes a connecting rod and a locking pin connected to one end of the connecting rod. The other end of the connecting rod is connected to the motor drive. Both the locking pin and the locking hole are circular, and the end face of the locking pin is provided with a guide radius.

[0020] The locking rod is connected to the motor drive via a connecting rod. The locking pin and locking hole adopt a circular fit, and the locking pin end face is designed with a guide rounded corner. The guide rounded corner forms a smooth insertion guide, allowing the locking pin to slide precisely into the locking hole along a preset trajectory under the drive of the motor. This effectively corrects minor deviations during the docking process and avoids the jamming or misalignment problems that are prone to occur with non-circular fits, enabling quick and precise docking. Both the locking pin and the locking hole are circular, and the uniform circumferential contact greatly improves the force balance of the locking surface, enhances the rigidity and stability of the locking rod and locking hole fit, and can more reliably resist the force generated by the load changes of the lifting track. It effectively suppresses the sinking or rebound of the lifting track; at the same time, the guide rounded corners buffer the impact force when the locking pin is inserted, reduce the hard contact wear between the locking pin and the end face of the lock hole, extend the service life of the components, and improve long-term reliability; the segmented design of the connecting rod and the locking pin makes it easy to flexibly adjust the structural dimensions according to the installation space of the mounting cavity and the transmission requirements. The crossbeam and connecting rod can use standard parts, reducing the processing difficulty and cost, avoiding assembly errors, and improving the reliability and durability of locking. In addition, the locking pin is independently arranged to cooperate with the lock hole, and can be replaced independently when wear is required, reducing maintenance costs and making maintenance more convenient.

[0021] In a preferred embodiment, the locking rod includes a connecting rod and a locking pin connected to one end of the connecting rod. The other end of the connecting rod is connected to the motor drive. The sliding bushing is slidably sleeved on the outer periphery of the locking pin and is detachably fixed to the mounting cavity.

[0022] The design employs a segmented approach with connecting rods and locking pins. A sliding sleeve is slidably fitted around the locking pin and detachably fixed to the mounting cavity. The sliding sleeve precisely guides the locking pin, ensuring smooth movement along a preset trajectory under motor drive, improving insertion smoothness and accuracy. Furthermore, the segmented structure and detachable sliding sleeve facilitate replacement of worn locking pins or sliding sleeves according to actual usage needs, eliminating the need for complete disassembly of the locking assembly and reducing maintenance difficulty and cost. The detachable sliding sleeve also allows for adjustment of the installation position based on required docking precision, further optimizing the guiding effect and ensuring the accuracy and stability of the locking rod's docking with the lock hole.

[0023] In a preferred embodiment, the crossbeam forms a square-section mounting cavity, and the sliding bushing has a square outer wall fixed to the cavity wall of the mounting cavity and a circular inner hole for inserting the locking pin.

[0024] The crossbeam frame forms a square-section mounting cavity. The sliding bushing is designed with a square outer wall and a circular inner hole. On the one hand, the close fit between the square outer wall and the square mounting cavity restricts the circumferential rotation of the sliding bushing without the need for additional limiting structures, ensuring that its circular inner hole remains coaxially aligned with the lock hole and preventing guide offset caused by bushing rotation. On the other hand, the fit between the circular inner hole and the locking pin provides a smooth lateral movement channel for the locking pin, reducing frictional resistance during the movement of the locking pin, ensuring smooth insertion and improving locking efficiency. The circular inner hole ensures the flexibility of the locking pin's movement, balancing positioning stability and smooth movement, improving the accuracy of docking and the reliability of the locking action, effectively suppressing the movement space and step difference after the lifting rail and fixed rail are docked, while reducing component wear and extending the service life of the locking pin and locking seat.

[0025] In a preferred embodiment, the motor is vertically fixed in the middle of the crossbeam frame, and the output end of the motor is connected to a crankshaft, a first swing arm and a second swing arm driven by the crankshaft. The crankshaft extends into the mounting cavity, and the locking rod includes a first locking rod and a second locking rod located on both sides of the crankshaft. The first locking rod and the second locking rod are respectively connected to the first swing arm and the second swing arm.

[0026] The motor is vertically fixed in the middle of the crossbeam frame. Through the crankshaft, it drives the first and second swing arms on both sides, which are connected to their corresponding locking rods. By utilizing the centrally positioned motor and the synchronous transmission with the crankshaft, symmetrical synchronous extension and retraction of the locking rods on both sides is achieved. This ensures synchronous locking between the two ends of the lifting rail and the corresponding left and right fixed rails, guaranteeing balanced locking force on both sides when the lifting rail is connected to the fixed rails. This prevents rail tilting or connection misalignment caused by unilateral force, ensuring connection accuracy. Furthermore, the vertical mounting of the motor and its transmission combination with the swing arms and crankshaft achieves an integrated design of double-sided locking within a limited installation cavity space. This design simplifies the transmission chain and avoids the control complexity and synchronization error problems caused by multi-motor drives. If multiple motors are used to drive the first and second locking rods separately, it will not only increase the structural complexity and assembly difficulty, but also easily cause action delays due to differences in motor parameters, reducing locking reliability. At the same time, the centrally located motor makes the crossbeam frame more evenly stressed, reducing structural deformation during transmission. This not only improves the synchronization and docking accuracy of double-sided locking, but also enhances structural stability, effectively suppressing the movement space and step difference of the track caused by locking imbalance. It also simplifies the control and assembly process and reduces maintenance costs.

[0027] In a preferred embodiment, the outer wall of the crossbeam frame is fixed with a mounting bracket, the motor is fixed to the mounting bracket, and the mounting bracket is provided with a protective plate surrounding the outside of the output end.

[0028] The motor is fixed to the outer wall of the crossbeam frame by mounting brackets, which are equipped with protective plates to enclose the motor output end. On the one hand, the mounting brackets provide a stable and precise installation reference for the motor, ensuring the coaxiality of the motor output end and crankshaft transmission, and avoiding transmission jamming or synchronization errors caused by motor installation misalignment. On the other hand, the protective plate effectively shields and protects the motor output end and transmission components such as the crankshaft and swing arm, preventing dust, oil, and obstacles in the production site from corroding or damaging the transmission mechanism. Without the protective plate, the transmission components would be exposed and susceptible to external interference, leading to wear and jamming, affecting the smoothness and reliability of the locking action. At the same time, the integrated design of the mounting bracket and protective plate simplifies the motor installation process and improves the structural integration of the device, avoiding the assembly cumbersome problems caused by additional protective structures. Separating the mounting and protective components would increase structural complexity and maintenance costs. Therefore, the use of mounting brackets not only ensures the stability and synchronization of motor transmission and extends the service life of transmission components, but also indirectly improves the accuracy and locking reliability of the locking rod and locking hole docking. This effectively avoids problems such as track docking failure and step difference caused by transmission failure, ensuring long-term stable docking between the lifting track and the fixed track and smooth operation of the EMS train. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a perspective structural diagram of the track and locking device in one embodiment of the present invention; Figure 2 This is a cross-sectional view of the track and locking device in one embodiment of the present invention; Figure 3 for Figure 2 Enlarged view of part A in the middle; Figure 4 This is an exploded structural diagram of the locking device in one embodiment of the present invention; Figure 5 This is a schematic diagram of the locking seat in one embodiment of the present invention; Figure 6 This is a schematic diagram of the locking pin in one embodiment of the present invention; Figure 7 This is a schematic diagram of the sliding bushing in one embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the motor assembly in one embodiment of the present invention; Figure 9This is an exploded structural diagram of the motor assembly in one embodiment of the present invention.

[0030] List of components and reference numerals: 10. Locking seat; 101. Locking hole; 11. Mounting plate; 12. Positioning block; 121. First positioning block; 122. Second positioning block; 123. Guide arc surface; 20. Locking assembly; 21. Crossbeam frame; 211. Mounting cavity; 212. Port; 22. Locking rod; 221. Connecting rod; 222. Locking pin; 223. Guide fillet; 224. First locking rod; 225. Second locking rod; 23. Sliding bushing; 24. Motor; 241. Coupling; 25. Crankshaft; 26. First swing arm; 27. Second swing arm; 28. Mounting bracket; 29. ​​Protective plate; 100. Fixed rail; 200. Lifting rail; 300. Lifting arm; 400. Rail suspension. Detailed Implementation

[0031] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0032] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0033] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] like Figure 1-9 As shown, in one embodiment, this utility model provides a locking device for a lifting track, including a locking seat 10 installed on a fixed track 100 and a locking component 20 installed on the lifting track 200. (In conjunction with...) Figure 2 , 3 The locking seat 10 is provided with a locking hole 101; the locking assembly 20 includes a crossbeam 21, a locking rod 22, a sliding bushing 23, and a motor 24 fixed to the crossbeam 21. The crossbeam 21 is provided with a mounting cavity 211. The locking rod 22 is movably mounted in the mounting cavity 211 through the sliding bushing 23. The mounting cavity 211 extends to the end of the crossbeam 21 and has a port 212 facing the locking seat 10. The motor 24 drives the locking rod 22 to move laterally along the mounting cavity 211, so that the end of the locking rod 22 extends out from the port 212 and is inserted into the locking hole 101.

[0037] The locking device for the lifting track 200 provided in this embodiment of the utility model has a locking rod 22 movably mounted in the mounting cavity 211 via a sliding bushing 23. The mounting cavity 211 extends to the end of the crossbeam 21 and has a port 212 facing the locking seat 10. Combined with the simple design of the locking hole 101 on the locking seat 10, unnecessary assembly errors are avoided. The mounting cavity 211 and the sliding bushing 23 limit and guide the locking rod 22, preventing it from shifting. The simplified guiding structure improves the smoothness of the locking rod 22's insertion. During the locking process between the lifting track 200 and the fixed track 100, when the lifting track 200 moves into position, the port 212 of the mounting cavity 211... With the locking rod 22 facing the locking seat 10, pre-alignment between the locking rod 22 and the locking seat 10 can be achieved, reducing the difficulty of alignment between the locking rod 22 and the lock hole 101 and avoiding misalignment between the locking rod 22 and the lock hole 101. On this basis, with the guidance and limiting effect of the sliding bushing 23 in the crossbeam frame 21 on the locking rod 22, combined with the motor 24 driving the locking rod 22 to move laterally and accurately along the mounting cavity 211, the end of the locking rod 22 extends from the port 212 and is inserted into the lock hole 101, completing the final locking of the locking rod 22 and the locking seat 10. Therefore, during the entire locking process, the alignment between the locking rod 22 and the locking seat 10 is easy, the movement of the locking rod 22 is precisely controlled, and the locking accuracy is high. Furthermore, in the locked state, since the locking rod 22 and the locking hole 101 are plugged in, they can fit tightly together, thereby limiting and precisely controlling the floating space of the locking rod 22. This significantly enhances the reliability of the locking and fixing, effectively preventing the lifting rail 200 from sinking or rebounding due to load changes at the source of locking, preventing step difference problems, further ensuring the smooth transition of the EMS train's carbon brushes between the sliding contact lines, maintaining the stability and continuity of the train's operation, effectively avoiding the risk of equipment damage and downtime caused by docking problems, and improving docking accuracy and locking strength.

[0038] In addition, the mounting cavity 211 not only assists in the pre-alignment of the locking rod 22, reducing the difficulty of alignment, but also enables the concealed installation of the locking rod 22. It has a high degree of structural integration, saves space, and prevents the locking rod 22 from being bumped, contaminated by dust, or corroded by the external environment. It avoids the problem of the locking rod 22 getting stuck or its fitting accuracy decreasing due to external interference. This indirectly ensures the long-term stable operation of the lifting rail 200 after it is connected to the fixed rail 100. It avoids the chain reaction problems such as loose connection and step difference caused by the failure of the locking rod 22. It improves the structural protection, motion reliability and alignment accuracy of the locking device, improves the reliability of the plug-in locking, and reduces maintenance costs.

[0039] In summary, this utility model, through the pre-alignment guidance and precise orientation of the locking rod 22 by the mounting cavity 211 and the sliding bushing 23, combined with the simple locking hole 101 design of the locking seat 10, greatly reduces the difficulty of alignment and avoids deviation. Driven by the motor 24, the locking rod 22 and the locking hole 101 are locked with high precision, strictly limiting the floating space and suppressing the sinking or rebound caused by the load change of the lifting track 200 from the root, ensuring the stable operation of the EMS train. At the same time, the mounting cavity 211 effectively protects the locking rod 22, making the structure integrated and reliable.

[0040] This utility model does not limit the specific structure of the locking seat, and it can adopt any one of the following embodiments 1-3: Implementation Example 1, such as Figure 4 As shown, the locking seat 10 includes a mounting plate 11 and a positioning block 12 protruding from the mounting plate 11. The mounting plate 11 is vertically fixed to the end of the fixed track 100. The positioning block 12 forms a locking hole 101, and the locking rod 22 is inserted into the inner side of the positioning block 12. More preferably, the positioning block 12 includes a first positioning block 121 and a second positioning block 122 arranged at intervals. The gap between the first positioning block 121 and the second positioning block 122 along the circumference of the locking rod 22 is smaller than the outer diameter of the locking rod 22.

[0041] The locking seat 10 is vertically fixed to the end of the fixed rail 100 via the mounting plate 11. Combined with the positioning block 12 forming a locking hole 101 that is inserted into the inner side of the locking rod 22, the vertically mounted mounting plate 11 ensures the joint strength with the end of the fixed rail 100 and provides a stable mounting reference for the positioning block 12, ensuring the alignment accuracy of the locking hole 101 and the locking rod 22, avoiding docking deviation caused by the offset of the mounting reference, and improving docking accuracy. On the other hand, the insertion and cooperation between the locking hole 101 formed by the positioning block 12 and the locking rod 22 enhances the rigidity and stability of the locking and fixing. The positioning block 12 effectively suppresses the movement space of the lifting rail 200 after docking, improves the locking strength, effectively suppresses the floating caused by load changes of the lifting rail 200, and further ensures the stable docking of the lifting rail 200 and the fixed rail 100 and the smooth operation of the EMS train.

[0042] The positioning blocks 12 consist of a first positioning block 121 and a second positioning block 122 arranged at intervals, with the gap between them along the circumference of the locking rod 22 being smaller than the outer diameter of the locking rod 22. On the one hand, the circumferential limiting of the two positioning blocks 12 forms a constraint space that matches the locking rod 22, ensuring that the locking rod 22 fits tightly against the inner walls of the two positioning blocks 12 after insertion. This also prevents the locking rod 22 from disengaging from the lock hole 101 enclosed by the two blocks, eliminating the play in the locking structure of the prior art and preventing the locking rod 22 from shaking within the lock hole 101. On the other hand, the first positioning block 121 and the second positioning block 122 are spaced apart, thus forming a gap between them. This reduces the frictional resistance during the insertion process of the locking rod 22 and the positioning blocks 12 without causing the locking rod 22 to disengage, improving the smoothness of the locking process, reducing wear on the locking rod 22, preventing deformation of the locking rod 22, and ensuring the long-term stability of the lifting rail 200 after docking with the fixed rail 100.

[0043] Preferably, the locking rod 22 is inserted into the inner side of the positioning block 12 and abuts against the mounting plate 11 to further enhance the engagement strength.

[0044] In Implementation Example 2, unlike Implementation Example 1, the positioning block 12 is in the shape of a ring to enclose and form a circumferentially closed lock hole 101.

[0045] The positioning block 12 forms a circumferentially closed locking hole 101 in a ring shape. On the one hand, the fully circumferentially closed structure provides 360° no-dead-angle limiting for the locking rod 22, ensuring that the locking rod 22 fully fits the inner wall of the locking hole 101 after insertion. This completely eliminates the radial movement gap present in traditional non-closed locking structures, preventing the locking rod 22 from easily shifting or shaking within the locking hole 101, which could lead to displacement space after track docking. This avoids risks such as track step difference, carbon brush damage, and train setdown caused by low locking fit accuracy, ensuring long-term stable operation of the lifting track 200 after docking with the fixed track 100. On the other hand, the circumferentially closed locking hole 101 provides precise full-circumferential guidance for the locking rod 22, ensuring that the locking rod 22 always inserts along the preset trajectory when the motor 24 drives it to move laterally, avoiding alignment misalignment and jamming problems, and ensuring docking efficiency.

[0046] Implementation Example 3 differs from Implementation Example 1 in that, in this implementation example, the locking seat includes a mounting plate, and the lock hole is provided through the mounting plate.

[0047] It should be noted that, based on different locking seat structures, the lock hole in this utility model can be a round hole or a polygonal hole, such as a rectangular hole, a pentagonal hole, or a hexagonal hole, and the end of the positioning rod matches the shape of the lock hole. The lock hole can be circumferentially closed or have a notch along the circumferential direction, with the notch smaller than the outer diameter of the end of the positioning rod.

[0048] like Figure 5 As shown, in a preferred embodiment of the present invention, the end face of the positioning block 12 is provided with a guide arc surface 123 extending toward the center of the lock hole 101.

[0049] Of course, in other embodiments, the end face of the positioning block 12 may optionally be set as a guide slope, for example, the positioning block encloses a rectangular hole, and a guide slope is set on each side of the rectangular hole.

[0050] This embodiment provides a precise guiding path for the insertion of the locking rod 22 by setting a guide arc surface 123 or guide slope extending towards the center of the locking hole 101 on the end face of the positioning block 12. This allows the locking rod 22 to slide smoothly into the locking hole 101 along the guide surface under the drive of the motor 24, improving docking efficiency. On the other hand, the gradual transition design of the guide arc surface 123 or guide slope can buffer the impact force when the locking rod 22 is inserted, avoiding component wear caused by hard contact. At the same time, the guiding action automatically corrects the slight offset of the locking rod 22, further improving the alignment accuracy, ensuring the accuracy of the insertion, and ensuring the stability of the docking between the lifting rail 200 and the fixed rail 100 and the smooth operation of the EMS train.

[0051] like Figure 4 , 6 As shown, in a preferred embodiment, the locking rod 22 includes a connecting rod 221 and a locking pin 222 connected to one end of the connecting rod 221. The other end of the connecting rod 221 is connected to the motor 24 for transmission. In this embodiment, both the locking pin 222 and the locking hole 101 are circular, and the end face of the locking pin 222 is provided with a guide radius 223.

[0052] Of course, in other embodiments, the locking rod 22 can be an integral structure, with the end of the locking rod directly inserted into the lock hole, and a guide radius is provided on the end face of the locking rod.

[0053] Additionally, it is understandable that when both the locking pin 222 and the locking hole 101 are polygonal, a guide radius can still be provided on the end face of the locking rod.

[0054] In this embodiment, the locking rod 22 is connected to the motor 24 via the connecting rod 221. The locking pin 222 and the locking hole 101 are designed with a circular fit, and the end face of the locking pin 222 is provided with a guide radius 223. The guide radius 223 forms a smooth insertion guide, allowing the locking pin 222 to slide precisely into the locking hole 101 along a preset trajectory under the drive of the motor 24. This effectively corrects minor deviations during the docking process and avoids the jamming or misalignment problems that are prone to occur with non-circular fits, thus quickly completing the precise docking. Both the locking pin 222 and the locking hole 101 are circular, and the uniform circumferential contact greatly improves the force balance of the locking surface, enhances the rigidity and stability of the fit between the locking rod 22 and the locking hole 101, and can more reliably resist the changes in load on the lifting track 200. The generated force effectively suppresses the sinking or rebound of the lifting rail 200; at the same time, the guide radius 223 buffers the impact force when the locking pin 222 is inserted, reduces the hard contact wear between the locking pin 222 and the end face of the lock hole 101, extends the service life of the components, and improves long-term reliability; the segmented design of the connecting rod 221 and the locking pin 222 makes it easy to flexibly adjust the structural dimensions according to the installation space of the mounting cavity 211 and the transmission requirements. The crossbeam frame 21 and the connecting rod 221 can use standard parts, reducing the processing difficulty and cost, avoiding assembly errors, and improving the reliability and durability of locking. At the same time, the locking pin 222 is independently arranged to cooperate with the lock hole 101, and can be replaced independently when wear requires replacement, reducing maintenance costs and making maintenance more convenient.

[0055] Understandably, in this utility model, the sliding bushing can be integrally formed with the crossbeam frame 21.

[0056] As a preferred option, such as Figure 4 As shown, the locking lever 22 includes a connecting rod 221 and a locking pin 222 connected to one end of the connecting rod 221. The other end of the connecting rod 221 is connected to the motor 24 for transmission. The sliding bushing 23 is slidably sleeved on the outer periphery of the locking pin 222 and is detachably fixed to the mounting cavity 211.

[0057] The design employs a segmented structure of connecting rod 221 and locking pin 222, with sliding sleeve 23 slidably fitted around the outer periphery of locking pin 222 and detachably fixed to mounting cavity 211. The precise guidance of locking pin 222 by sliding sleeve 23 ensures smooth movement of locking pin 222 along a preset trajectory under the drive of motor 24, improving the smoothness and accuracy of insertion. Simultaneously, the segmented structure and detachable sliding sleeve 23 facilitate the replacement of worn locking pin 222 or sliding sleeve 23 according to actual usage needs, without requiring complete disassembly of the locking assembly 20, reducing maintenance difficulty and cost. Furthermore, the detachable fixing method of sliding sleeve 23 allows adjustment of the installation position according to the required docking accuracy, further optimizing the guiding effect and ensuring the accuracy and stability of the docking between locking rod 22 and lock hole 101.

[0058] In addition, combined Figure 4 , Figure 7 As shown, in a preferred embodiment, the crossbeam 21 forms a square-section mounting cavity 211, and the sliding bushing 23 has a square outer wall fixed to the cavity wall of the mounting cavity 211 and a circular inner hole for inserting the locking pin 222.

[0059] With this configuration, the crossbeam 21 forms a square-section mounting cavity 211. The sliding bushing 23 is adapted to adopt a structural design with a square outer wall and a circular inner hole. On the one hand, the close fit between the square outer wall and the square mounting cavity 211, without the need for additional limiting structures, can restrict the circumferential rotation of the sliding bushing 23 itself, ensuring that its circular inner hole always remains coaxially aligned with the locking hole 101, avoiding guide offset caused by bushing rotation. On the other hand, the fit between the circular inner hole and the locking pin 222 provides a smooth lateral movement channel for the locking pin 222, reducing the frictional resistance during the movement of the locking pin 222, ensuring the smoothness of the insertion action, and improving the locking efficiency. The circular inner hole ensures the flexibility of the movement of the locking pin 222, taking into account both positioning stability and smooth movement, improving the accuracy of docking and the reliability of the locking action, effectively suppressing the activity space and step difference after the lifting rail 200 and the fixed rail 100 are docked, while reducing component wear and extending the service life of the locking pin 222 and the locking seat 10.

[0060] This invention does not limit the driving method of the locking component. Referring to 1-9, in a preferred embodiment, the motor 24 is vertically fixed to the middle of the crossbeam frame 21, as shown in Figures 1-9. Figure 8 , 9 As shown, the output end of the motor 24 is connected to the crankshaft 25, the first swing arm 26 and the second swing arm 27 driven by the crankshaft 25. The crankshaft 25 extends into the mounting cavity 211. The locking rod 22 includes a first locking rod 224 and a second locking rod 225 located on both sides of the crankshaft 25. The first locking rod 224 and the second locking rod 225 are respectively connected to the first swing arm 26 and the second swing arm 27.

[0061] Combination Figure 1-4 The locking principle of the locking component in this embodiment will be explained in detail: like Figure 1As shown, the crossbeam frame 21 is parallel to the lifting rail 200 via the rail suspension 400. The lifting arm is used to support the loads of the crossbeam frame, lifting rail, vehicles, etc., and moves them up and down with the elevator. When the lifting rail 200 rises or falls to a preset position, that is, the port of the mounting cavity on the crossbeam frame 21 faces the locking seat 10 of the fixed rail 100. By controlling the operation of the motor 24, the first swing arm 26 and the second swing arm 27 swing synchronously and in opposite directions under the drive of the crankshaft 25. Thus, the first swing arm 26 drives the first locking rod 224 to extend from the left port of the lifting rail and lock with the locking seat 10 of the left fixed rail 100. At the same time, the second swing arm 27 drives the second locking rod 225 to extend from the left port of the lifting rail and lock with the locking hole of the locking seat 10 of the right fixed rail 100. Thus, a set of motors is used to achieve synchronous locking of the two locking rods, so that both ends of the lifting rail 200 are locked and engaged with the corresponding fixed rail 100.

[0062] Similarly, when it is necessary to separate the lifting rail 200 from the fixed rail 100, the control motor rotates in the opposite direction. The first swing arm 26 then retracts the first locking rod 224 from the left end of the lifting rail and disengages it from the locking hole 101 of the locking seat 10 of the left fixed rail 100. Simultaneously, the second swing arm 27 retracts the second locking rod 225 from the left end of the lifting rail and disengages it from the locking hole 101 of the locking seat 10 of the right fixed rail 100. This completes the unlocking of both ends of the lifting rail 200 from the fixed rail 100, allowing the lifting rail to continue its lifting motion.

[0063] In the driving method provided in this embodiment, the motor 24 is vertically fixed to the middle of the crossbeam frame 21. The crankshaft 25 drives the first swing arms 26 and the second swing arms 27 on both sides to connect to the corresponding locking rods 22. Thus, by utilizing the centrally positioned motor 24 and the synchronous transmission with the crankshaft 25, symmetrical synchronous extension and retraction of the locking rods 22 on both sides is achieved. This enables synchronous locking between the two ends of the lifting track 200 and the corresponding left and right fixed tracks 100, ensuring balanced locking force on both sides when the lifting track 200 is connected to the fixed tracks 100. This avoids track tilting or connection misalignment caused by unilateral force, ensuring connection accuracy. Furthermore, the vertical mounting of the motor 24 with the transmission combination of the swing arms and crankshaft 25 within the limited mounting cavity... The integrated design of double-sided locking within space 211 simplifies the transmission chain and avoids the control complexity and synchronization error problems caused by multiple motors 24. If multiple motors 24 are used to drive the first locking rod 224 and the second locking rod 225 respectively, it will not only increase the structural complexity and assembly difficulty, but also easily cause action delay due to the difference in motor parameters 24, reducing locking reliability. At the same time, the centrally arranged motor 24 makes the crossbeam frame 21 more evenly stressed, reducing structural deformation during transmission. This not only improves the synchronization and docking accuracy of double-sided locking, but also strengthens structural stability, effectively suppressing the movement space and step difference of the track caused by locking imbalance. It also simplifies the control and assembly process and reduces maintenance costs.

[0064] Preferably, the outer wall of the crossbeam frame 21 is fixed with a mounting bracket 28, the motor 24 is fixed to the mounting bracket 28, and the mounting bracket 28 is provided with a protective plate 29 that surrounds the outside of the output end.

[0065] The motor 24 is fixed to the outer wall of the crossbeam frame 21 by the mounting bracket 28, and the mounting bracket 28 is equipped with a protective plate 29 to protect the output end of the motor 24. On the one hand, the mounting bracket 28 provides a stable and precise installation reference for the motor 24, ensuring the coaxiality of the transmission between the output end of the motor 24 and the crankshaft 25, and avoiding transmission jamming or synchronization error caused by the installation misalignment of the motor 24. On the other hand, the protective plate 29 effectively shields and protects the output end of the motor 24 and transmission components such as the crankshaft 25 and the swing arm, preventing dust, oil and obstacles in the production site from corroding or damaging the transmission mechanism. Without the protective plate 29, the transmission components would be exposed to the outside and easily affected by external interference, resulting in wear and jamming, affecting the smoothness and reliability of the locking action. At the same time, the integrated design of the mounting bracket 28 and the protective plate 29 simplifies the installation process of the motor 24 and improves the structural integration of the device, avoiding the cumbersome assembly problems caused by additional protective structures. If the installation and protection components are set separately, it will increase the structural complexity and maintenance costs. Therefore, the use of mounting bracket 28 not only ensures the stability and synchronization of the motor 24 transmission and extends the service life of the transmission components, but also indirectly improves the accuracy and locking reliability of the locking rod 22 and the locking hole 101 docking. It effectively avoids problems such as track docking failure and step difference caused by transmission failure, and ensures long-term stable docking between the lifting track 200 and the fixed track 100 and smooth operation of the EMS train.

[0066] like Figure 8 As shown, to further ensure the coaxiality of the transmission between the output end of the motor 24 and the crankshaft 25, more preferably, the output end of the motor 24 and the crankshaft 25 are connected by a coupling 241. With this configuration, the coupling can compensate for the offset (including axial offset, radial offset, angular offset, or combined offset) between the output shaft of the motor and the crankshaft caused by manufacturing and installation inaccuracies, deformation during operation, or thermal expansion. Moreover, the coupling can also mitigate impacts and absorb vibrations. Thus, by using the mounting bracket 28 for installation and then connecting the transmission through the coupling 241, coaxial transmission between the motor 24 and the crankshaft 25 is achieved, avoiding transmission jamming or synchronization errors caused by the installation misalignment of the motor 24.

[0067] Of course, it should be noted that in other embodiments of this utility model, a gear and rack assembly can be provided at the output end of the motor to complete the synchronous drive of the first locking rod 224 and the second locking rod 225. For example, a gear is sleeved on the motor shaft, and the upper and lower sides of the gear mesh with the first rack and the second rack. The first rack and the second rack are respectively connected to the first locking rod 224 and the second locking rod 225. When the motor rotates forward, the first locking rod 224 and the second locking rod 225 extend out of the two ports of the lifting track at the same time and lock with the locking seat. When the motor rotates in reverse, the first locking rod 224 and the second locking rod 225 retract into the two ports of the lifting track at the same time and unlock with the locking seat.

[0068] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0069] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0070] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A locking device for a lifting track, comprising a locking seat (10) mounted on a fixed track (100) and a locking assembly (20) mounted on the lifting track (200), characterized in that, The locking seat (10) is provided with a locking hole (101); The locking assembly (20) includes a crossbeam frame (21), a locking rod (22), a sliding bushing (23), and a motor (24) fixed to the crossbeam frame (21). The crossbeam frame (21) has a mounting cavity (211). The locking rod (22) is movably mounted in the mounting cavity (211) through the sliding bushing (23). The mounting cavity (211) extends to the end of the crossbeam frame (21) and has a port (212) facing the locking seat (10). The motor (24) drives the locking rod (22) to move laterally along the mounting cavity (211) so that the end of the locking rod (22) extends from the port (212) and is inserted into the lock hole (101).

2. The locking device for a lifting track according to claim 1, characterized in that, The locking seat (10) includes a mounting plate (11) and a positioning block (12) protruding from the mounting plate (11). The mounting plate (11) is vertically fixed to the end of the fixed track (100). The positioning block (12) surrounds and forms the locking hole (101). The locking rod (22) is inserted into the inner side of the positioning block (12).

3. The locking device for a lifting track according to claim 2, characterized in that, The positioning block (12) includes a first positioning block (121) and a second positioning block (122) arranged at intervals. The gap between the first positioning block (121) and the second positioning block (122) along the circumference of the locking rod (22) is smaller than the outer diameter of the locking rod (22).

4. The locking device for a lifting track according to claim 2, characterized in that, The positioning block (12) is in the shape of a ring to enclose the circumferentially closed lock hole (101).

5. A locking device for a lifting track according to claim 2, characterized in that, The end face of the positioning block (12) is provided with a guide arc surface (123) or guide slope extending toward the center of the lock hole (101).

6. The locking device for a lifting track according to claim 1, characterized in that, The locking rod (22) includes a connecting rod (221) and a locking pin (222) connected to one end of the connecting rod (221). The other end of the connecting rod (221) is connected to the motor (24) for transmission. The locking pin (222) and the locking hole (101) are both round. The end face of the locking pin (222) is provided with a guide radius (223).

7. The locking device for a lifting track according to claim 1, characterized in that, The locking rod (22) includes a connecting rod (221) and a locking pin (222) connected to one end of the connecting rod (221). The other end of the connecting rod (221) is connected to the motor (24) for transmission. The sliding bushing (23) is slidably sleeved on the outer periphery of the locking pin (222). The sliding bushing (23) is detachably fixed to the mounting cavity (211).

8. A locking device for a lifting track according to claim 7, characterized in that, The crossbeam frame (21) forms a square mounting cavity (211), and the sliding bushing (23) has a square outer wall fixed to the cavity wall of the mounting cavity (211) and a circular inner hole for inserting the locking pin (222).

9. A locking device for a lifting track according to claim 1, characterized in that, The motor (24) is vertically fixed in the middle of the crossbeam frame (21). The output end of the motor (24) is connected to a crankshaft (25), a first swing arm (26) driven by the crankshaft (25), and a second swing arm (27). The crankshaft (25) extends into the mounting cavity (211). The locking rod (22) includes a first locking rod (224) and a second locking rod (225) located on both sides of the crankshaft (25). The first locking rod (224) and the second locking rod (225) are respectively connected to the first swing arm (26) and the second swing arm (27).

10. A locking device for a lifting track according to claim 9, characterized in that, The outer wall of the crossbeam frame (21) is fixed with a mounting bracket (28), the motor (24) is fixed to the mounting bracket (28), and the mounting bracket (28) is provided with a protective plate (29) surrounding the outside of the motor output end.

Images