Lifting synchronization structure of hanging basket bottom basket

Abstract

This application provides a synchronous lifting structure for the bottom basket of a hanging basket, including a crossbeam at the top of the hanging basket, a base frame on the crossbeam, a lifting frame above the base frame, at least four synchronously lifting and positioning components on the base frame, the upper end of each lifting and positioning component abutting the lower end of the lifting frame, multiple pin seats on the lifting frame, the pin seats connecting to the upper end of the hanging rods of the crossbeam, a rotatable main drive shaft on the base frame, and a rotatable transmission shaft on one side of each lifting and positioning component, the transmission shaft driving the lifting and positioning component to rise and fall, and the two ends of the main drive shaft transmitting power to each transmission shaft, thus solving the problem of synchronous lifting and lowering of the hanging rods of the bottom basket of the hanging basket.

Description

Technical Field

[0001] This invention relates to the field of bridge hanging basket construction, and in particular to a synchronous lifting structure for the bottom basket of the hanging basket. Background Technology

[0002] Cantilever formwork construction is the core technology for cantilever casting of long-span bridges. The bottom formwork, as a key load-bearing and working platform, requires precise lifting and adjustment as a crucial step in the construction process. During the concrete pouring of a single bridge segment, the bottom formwork must be kept at a high position to meet the requirements for beam casting. Once the entire segment is completed, the bottom formwork must be lowered to a lower position to avoid obstructing the formwork structure, provide sufficient space for demolding, and complete the demolding operation. Subsequently, the entire formwork is moved laterally to the next construction position to begin the next segment's cyclical construction.

[0003] Hanging baskets typically employ a threaded transmission structure using a screw and sleeve to raise and lower the lifting rods, thereby adjusting the basket's height. Due to the large area of ​​the basket, multiple lifting rods are required for slinging. Traditionally, for height adjustment, a lifting mechanism, such as a jack, is installed at the upper connection point of each lifting rod to raise the lifting point. However, the lack of synchronization between these jack-like lifting mechanisms leads to differences in the lifting speed of each lifting rod and the real-time height of the lifting point. This can cause the basket to tilt, easily resulting in jamming or breakage at the connection point between the lifting rod and the basket. Summary of the Invention

[0004] This invention provides a synchronous lifting structure for the bottom basket of a hanging basket, which solves the problem of synchronous lifting of the various hanging rods of the bottom basket.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a synchronous lifting structure for a hanging basket bottom basket, including a crossbeam set at the top of the hanging basket, a base frame set on the crossbeam, a lifting frame set above the base frame, at least four lifting and positioning components that can be lifted and lowered synchronously on the base frame, the upper end of the lifting and positioning components abutting against the lower end of the lifting frame, and multiple pin seats set on the lifting frame, the pin seats connecting to the upper end of the suspension rod of the crossbeam.

[0006] In the preferred embodiment, the base frame is equipped with a rotatable main drive shaft, and each lifting and positioning component is equipped with a rotatable transmission shaft on one side. The transmission shaft drives the lifting and positioning components to rise and fall, and the two ends of the main drive shaft are connected to each transmission shaft.

[0007] In a preferred embodiment, the lifting and positioning component includes a fixed base, within which a slidingly fitted lifting base is provided. The lifting base contains a liftable core, and the inner wall of the lifting base has a narrow-necked step. The outer wall of the lifting core also has a lifting step. The lifting core rises to allow the lifting step to abut against the narrow-necked step, thus raising the lifting base. The side wall of the fixed base has multiple sliding slots along its circumference, each slot containing a laterally retractable tongue block. The upper end of the tongue block has a stop surface, and the fixed base contains a stop platform. The tongue block switches between retractable and extended states to allow the lower end of the lifting base to abut against the stop surface or stop platform.

[0008] In the preferred embodiment, the fixed base is provided with a rotatable baffle, and the lower end of the lifting core is provided with a screw part, which is threadedly connected to the baffle. The baffle rotates to make the lifting platform abut against the narrow-necked platform.

[0009] In a preferred embodiment, a first bevel gear transmission mechanism is provided between the main drive shaft and the transmission shaft, and a second bevel gear transmission mechanism is provided between the transmission shaft and the lifting and positioning assembly, with the baffle connected to the second bevel gear transmission mechanism.

[0010] In the preferred embodiment, the lifting core is provided with an inverted conical surface, and the side end of the tongue block is provided with a wedge-shaped surface. The lifting core moves down so that the inverted conical surface presses against the wedge-shaped surface, and the tongue block retracts so that the stop surface separates from the lower end of the lifting seat. A baffle is provided on the outside of the fixed base, and a third spring is provided on the baffle. The third spring stops the tongue block.

[0011] In a preferred embodiment, the upper side wall of the lifting core is provided with a third pin hole, and a retractable inner pin is provided in the third pin hole. The side wall of the lifting seat is provided with a second pin hole, and a slidable connecting pin is provided in the second pin hole. The side wall of the fixed seat is provided with a first pin hole, and a retractable top pin is provided in the first pin hole. The lifting core moves down to align the third pin hole with the second pin hole. The inner pin is inserted into the second pin hole to make the connecting pin move laterally. The lifting seat and the lifting core move down synchronously to align the second pin hole with the first pin hole. The lower end of the lifting seat contacts the stop platform. The top pin pushes the connecting pin to make the inner pin squeeze out of the second pin hole.

[0012] In the preferred embodiment, the inner end of the inner pin is provided with an outer cone head, the upper end of the lifting core is provided with a sliding hole, a lifting end is provided in the sliding hole, a second spring is provided between the bottom end of the sliding hole and the lifting end, and the lifting end abuts against the outer cone head.

[0013] In the preferred embodiment, a tail end stop is provided at the outer port of the first pin hole, an extension post is provided at one end of the top pin, the extension post is slidably sleeved with the tail end stop, a stop nut is provided at the end of the extension post, one side of the stop nut is used to abut against the tail end stop, and a first spring is sleeved on the outer side of the extension post, with both ends of the first spring abutting against the top pin and the tail end stop respectively.

[0014] In the preferred embodiment, the inner side of the fixed seat is provided with an inner extension pin, the outer wall of the lifting seat is provided with a first guide groove, the inner extension pin is slidably engaged with the first guide groove, the inner wall of the lifting seat is provided with a guide strip, the outer wall of the lifting core is provided with a second guide groove, and the guide strip is slidably engaged with the second guide groove.

[0015] The beneficial effects of this invention are as follows: the upper end pin seat of the boom is uniformly installed on the lifting frame, and the transmission mechanism drives the lifting and positioning components to lift and lower synchronously, avoiding imbalance and jamming during the lifting of the basket; the use of extendable and retractable tongue blocks achieves reliable positioning of the lifting seat at two different heights, and the detachable design of the lifting seat and lifting core allows the threaded structure to be relied upon only during lifting, while the threaded load is no longer relied upon during construction and work position transfer, avoiding excessive load on the threaded structure that could lead to wear or jamming; the lifting seat and lifting core can both contact to achieve the lifting function and separate, allowing the threaded structure to be de-loaded, and the cooperation of three types of pins (outer, middle, and inner) allows the lifting seat and lifting core to connect and separate at appropriate times, preventing the lifting seat from losing position control and facilitating the use of an external drive device to control the height of the lifting seat. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a side view of the hanging basket structure.

[0018] Figure 2 This is a top view of the hanging basket structure.

[0019] Figure 3 This is a diagram of the top structure of the hanging basket.

[0020] Figure 4 This is a schematic diagram showing the application location of the lifting and positioning component.

[0021] Figure 5 This is a schematic diagram of the overall lifting and positioning components.

[0022] Figure 6 This is an exploded structural diagram of the lifting and positioning component.

[0023] Figure 7 This is a structural diagram of the fixed base.

[0024] Figure 8 This is a structural diagram of the lifting seat.

[0025] Figure 9 This is a structural diagram of the lifting core.

[0026] Figure 10 This is a top-view sectional view of the lifting and positioning component.

[0027] Figure 11 This is section A when the lifting seat is at its first height.

[0028] Figure 12 This is the first height section view (B section).

[0029] Figure 13 This is the second-highest section view, A.

[0030] Figure 14 This is the second-highest section view, B.

[0031] Figure 15 This is the third-height section A view.

[0032] Figure 16 This is the third-height section view (B section).

[0033] Figure 17 This is the fourth height A section view.

[0034] Figure 18 This is the fourth height B section view.

[0035] Figure 19 This is the fifth height section A view.

[0036] Figure 20 This is the fifth height section B view.

[0037] Figure 21 This is the sixth height, section A view.

[0038] Figure 22 This is the sixth height, section B view.

[0039] Figure 23 This is an enlarged view of the top pin.

[0040] In the figure: Fixed base 1; Sliding slot 101; Stop platform 102; First pin hole 103; Top pin 104; First spring 105; Tail end stop 106; Extension column 107; Stop nut 108; Inner extension pin 109; Lifting base 2; Narrow neck step 201; Second pin hole 202; Connecting pin 203; First guide groove 204; Guide strip 205; Recessed hole 206; Annular groove 207; Lifting core 3; Screw part 301; Inverted conical surface 302; Lifting step 303; Third pin hole 304; Inner pin 305; Outer cone head 306; Lifting end 307; Second spring 308; Sliding hole 309; Second guide groove 310; Insert tongue block 4; Wedge surface 401; Stop surface 402; Baffle 5; Third spring 501; Limit pin 6; Lifting motor 7; Small gear 701; Main drive shaft 8; Large gear 801; First bevel gear transmission mechanism 802; Transmission shaft 9; Second bevel gear transmission mechanism 901; Lifting and positioning assembly 10; Lifting frame 11; Base frame 12; Hanging rod 13; Pin seat 14; Hanging basket 15; Crossbeam 1501; Bottom basket 16. Detailed Implementation

[0041] like Figure 1-23 In the present invention, a synchronous lifting structure for a hanging basket bottom basket includes a crossbeam 1501 set at the top of the hanging basket 15, a base frame 12 on the crossbeam 1501, a lifting frame 11 above the base frame 12, at least four lifting and positioning components 10 that can be lifted and lowered synchronously on the base frame 12, the upper end of the lifting and positioning components 10 abutting against the lower end of the lifting frame 11, and a plurality of pin seats 14 on the lifting frame 11, the pin seats 14 being connected to the upper end of the suspension rod 13 of the crossbeam 1501.

[0042] Two parallel pairs of crossbeams 1501 are installed at the top of the forward extension of the hanging basket 15. A base frame 12 can be installed on the crossbeams 1501. The base frame 12 is a frame structure with a horizontal connecting rod in the center to facilitate the installation of transmission and drive mechanisms.

[0043] Install a lifting and positioning component 10 at each of the four corners of the base frame 12, and then connect the lifting frame 11 to the upper end of the lifting and positioning component 10.

[0044] The lifting frame 11 has a frame structure, on which about eight pin seats 14 can be installed. The pin seat 14 has a sleeve structure, and the suspension rod 13 can be inserted into the center. The suspension rod 13 is anchored to the pin seat 14 by horizontal pins.

[0045] When the lifting and positioning components 10 are lifted synchronously, the lifting frame 11 can be driven to rise and fall smoothly. Each pin seat 14 pulls the hanging rod 13 so that the four corners of the bottom basket 16 rise and fall synchronously, avoiding the connection between the hanging rod 13 and the bottom basket 16 due to imbalance of the bottom basket 16.

[0046] Process holes are reserved on the lifting frame 11, the base frame 12, and the crossbeam 1501 for the suspension rod 13 to pass through.

[0047] In the preferred embodiment, the base frame 12 is provided with a rotatable main drive shaft 8, and each lifting and positioning component 10 is provided with a rotatable transmission shaft 9 on one side. The transmission shaft 9 drives the lifting and positioning component 10 to rise and fall, and the two ends of the main drive shaft 8 are connected to each transmission shaft 9.

[0048] Traditional hanging baskets typically employ a threaded transmission structure using a screw and sleeve to raise and lower the booms, thereby adjusting the basket height. While this threaded adjustment mechanism works normally under no-load conditions, during bridge concrete pouring, the basket must withstand the immense construction load, requiring the threaded lifting structure of the boom mounting frame to bear heavy tensile forces for extended periods. Prolonged overloading of the threaded assembly can easily lead to extrusion deformation and structural damage, significantly reducing the overall structural stability of the hanging basket and posing major construction safety hazards. Furthermore, it can easily cause problems such as thread jamming, severe wear of components, and sluggish lifting adjustments.

[0049] In a preferred embodiment, the lifting and positioning component 10 includes a fixed base 1, a slidingly fitted lifting base 2 inside the fixed base 1, a liftable lifting core 3 inside the lifting base 2, a narrow-necked step 201 on the inner wall of the lifting base 2, and a lifting step 303 on the outer wall of the lifting core 3. The lifting core 3 is raised so that the lifting step 303 abuts against the narrow-necked step 201 and the lifting base 2 is raised. The side wall of the fixed base 1 is provided with a plurality of sliding slots 101 along the circumference. Each sliding slot 101 is provided with a horizontally retractable tongue block 4. The upper end of the tongue block 4 is provided with a stop surface 402. The fixed base 1 is provided with a stop platform 102. The tongue block 4 switches between retractable and telescopic states so that the lower end of the lifting base 2 abuts against the stop surface 402 or the stop platform 102.

[0050] During the construction of this bridge segment, the lifting seat 2 descends to abut against the stop surface 402. After the segment construction is completed, the tongue block 4 retracts, the lifting seat 2 descends to abut against the stop platform 102, and the lifting frame 11 descends. Since the lower end of the hanger 13 is connected to the bottom basket 16 of the hanging basket 15, the bottom basket 16 also descends synchronously, making room for the demolding of the bridge segment. After demolding, the hanging basket 15 and the bottom basket 16 move forward synchronously to the next construction position.

[0051] In the preferred embodiment, the fixed base 1 is provided with a rotatable baffle 5, and the lower end of the lifting core 3 is provided with a screw part 301. The screw part 301 is threadedly connected to the baffle 5. The baffle 5 rotates clockwise so that the lifting platform 303 abuts against the narrow-necked platform 201.

[0052] The baffle 5 reverses to lower the lifting seat 2 and the lifting core 3 together. When the lower end of the lifting seat 2 abuts against the stop surface 402, the baffle 5 continues to reverse, lifting the step 303 and separating it from the narrow neck step 201. At this time, the threaded structure of the screw part 301 does not play a major load-bearing role, reducing wear on the threads. Compared with the thread bearing the force, the lifting seat 2 is supported by the stop surface 402, and the hanging basket can withstand greater force, resulting in higher reliability.

[0053] In a preferred embodiment, a first bevel gear transmission mechanism 802 is provided between the main drive shaft 8 and the transmission shaft 9, and a second bevel gear transmission mechanism 901 is provided between the transmission shaft 9 and the lifting and positioning assembly 10. The baffle 5 is connected to the second bevel gear transmission mechanism 901.

[0054] The first bevel gear transmission mechanism 802 and the second bevel gear transmission mechanism 901 include two bevel gears with vertically arranged rotating shafts that mesh with each other. One of the bevel gears in the second bevel gear transmission mechanism 901 is sleeved with the baffle 5.

[0055] The base frame 12 is also equipped with a lifting motor 7. The shaft end of the lifting motor 7 is equipped with a small gear 701, and a large gear 801 is fitted in the middle section of the large gear 801. The large gear 801 meshes with the small gear 701. The lifting motor 7 can drive the four lifting cores 3 to rotate synchronously, so as to realize the synchronous lifting of each lifting seat 2.

[0056] In the preferred embodiment, the lifting core 3 is provided with an inverted conical surface 302, and the side end of the tongue block 4 is provided with a wedge-shaped surface 401. The lifting core 3 moves down so that the inverted conical surface 302 presses against the wedge-shaped surface 401, and the tongue block 4 retracts so that the stop surface 402 disengages from the lower end of the lifting seat 2. A baffle 5 is provided on the outside of the fixed base 1, and a third spring 501 is provided on the baffle 5. The third spring 501 stops the tongue block 4.

[0057] When the lifting platform 303 is against the narrow-necked platform 201, if the baffle 5 continues to reverse, the lifting core 3 continues to move down, the inverted cone surface 302 pushes the tongue block 4 open, the lower end of the lifting seat 2 loses support and descends, until it is stopped by the stop platform 102.

[0058] The third spring 501 continuously pushes the tongue block 4, causing the tongue block 4 to tend to extend inward. When the inverted conical surface 302 disengages from the wedge-shaped surface 401, the tongue block 4 extends inward and the stop surface 402 is positioned below the lifting seat 2. Since the lower end of the tongue block 4 is directly supported by the stop platform 102, it receives better force, allowing the lifting seat 2 to remain stable in a high position for a long time.

[0059] Overall, during bridge construction and the relocation of the hanging basket and bottom basket, the threaded structure does not play a major load-bearing role. Only during the short period of height switching of the lifting frame 11, the threaded structure plays the role of adjusting the height of the lifting frame 11. Therefore, it can avoid the threads being subjected to force for a long time, which would lead to wear, jamming, or damage due to construction force exceeding the bearing limit.

[0060] After the tongue block 4 retracts, there is still a certain height between the lower end of the lifting seat 2 and the stop platform 102. Even if the basket is unloaded, the lifting frame 11 still bears a certain mass. If the lifting seat 2 suddenly falls and hits the stop platform 102, it will cause damage to the parts.

[0061] In the preferred embodiment, the upper side wall of the lifting core 3 is provided with a third pin hole 304, and a retractable inner pin 305 is provided in the third pin hole 304. The side wall of the lifting seat 2 is provided with a second pin hole 202, and a slidable connecting pin 203 is provided in the second pin hole 202. The side wall of the fixed seat 1 is provided with a first pin hole 103, and a retractable top pin 104 is provided in the first pin hole 103. The lifting core 3 moves down to align the third pin hole 304 with the second pin hole 202. The inner pin 305 is inserted into the second pin hole 202 to allow the connecting pin 203 to move laterally. The lifting seat 2 and the lifting core 3 move down synchronously to align the second pin hole 202 with the first pin hole 103. The lower end of the lifting seat 2 contacts the stop platform 102. The top pin 104 pushes the connecting pin 203 to force the inner pin 305 out of the second pin hole 202.

[0062] After the inner pin 305 is squeezed out of the second pin hole 202, the lifting seat 2 and the lifting core 3 are separated from the integrated state, and the threaded structure no longer bears the load of the bottom basket. At this time, the lifting core 3 can move up a small distance to keep the third pin hole 304 and the second pin hole 202 misaligned. When the lifting frame 11 needs to be lifted again, the lifting core 3 can rise so that the lifting platform 303 can support the narrow neck platform 201 again.

[0063] The lifting seat 2 is provided with a recessed hole 206 that communicates with the second pin hole 202. A threaded limit pin 6 is provided in the recessed hole 206. An annular groove 207 is provided on the outer wall of the connecting pin 203. The lower end of the limit pin 6 is inserted into the annular groove 207.

[0064] The lower end of the limiting pin 6 can slightly contact the side wall of the annular groove 207, indicating that the connecting pin 203 can slide while having appropriate friction, thus preventing the connecting pin 203 from moving freely laterally.

[0065] In the preferred embodiment, the inner end of the inner pin 305 is provided with an outer cone head 306, the upper end of the lifting core 3 is provided with a sliding hole 309, the sliding hole 309 is provided with a lifting end head 307, a second spring 308 is provided between the bottom end of the sliding hole 309 and the lifting end head 307, and the lifting end head 307 abuts against the outer cone head 306.

[0066] The upper end of the second spring 308 presses against the lifting end 307, and the lifting end 307 presses against the outer cone 306 so that the inner pin 305 has a tendency to move laterally outward.

[0067] In a preferred embodiment, a tail end stop 106 is provided at the outer port of the first pin hole 103, an extension post 107 is provided at one end of the top pin 104, the extension post 107 is slidably sleeved with the tail end stop 106, a stop nut 108 is provided at the end of the extension post 107, one side of the stop nut 108 is used to abut against the tail end stop 106, and a first spring 105 is sleeved on the outer side of the extension post 107, with both ends of the first spring 105 abutting against the top pin 104 and the tail end stop 106 respectively.

[0068] The top pin 104 remains in a forward-pushing state under the combined action of the elastic force of the first spring 105 and the limiting action of the stop nut 108. The opposite end of the top pin 104 and the connecting pin 203 is a relatively smooth round head. Therefore, when the lifting seat 2 moves down, the round head of the connecting pin 203 presses down on the round head of the top pin 104, causing the top pin 104 to retract slightly. The connecting pin 203 also gradually moves laterally under the action of the reaction force. When the first pin hole 103 is aligned with the second pin hole 202, the top pin 104 resets and pushes to the limit position. The connecting pin 203 retracts into the second pin hole 202, but the inner end does not exceed the second pin hole 202. The inner pin 305 is pushed back into the third pin hole 304, and the lifting seat 2 and the lifting core 3 can slide relative to each other.

[0069] In the preferred embodiment, the inner side of the fixed seat 1 is provided with an inner extension pin 109, the outer wall of the lifting seat 2 is provided with a first guide groove 204, the inner extension pin 109 is slidably engaged with the first guide groove 204, the inner wall of the lifting seat 2 is provided with a guide strip 205, the outer wall of the lifting core 3 is provided with a second guide groove 310, the guide strip 205 is slidably engaged with the second guide groove 310.

[0070] The lifting seat 2 slides along the fixed seat 1 and cannot rotate relative to it. When the baffle 5 rotates, the lifting core 3 is constrained by the lifting seat 2 and will not rotate, but can only slide up and down.

[0071] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A synchronous lifting and lowering structure for a hanging basket bottom, characterized in that: It includes a crossbeam (1501) set at the top of the hanging basket (15), a base frame (12) on the crossbeam (1501), a lifting frame (11) above the base frame (12), at least four lifting and positioning components (10) that can be lifted and lowered synchronously on the base frame (12), the upper end of the lifting and positioning component (10) abuts against the lower end of the lifting frame (11), and multiple pin seats (14) on the lifting frame (11), the pin seats (14) are connected to the upper end of the hanging rod (13) of the crossbeam (1501).

2. The basket lifting and lowering synchronous structure according to claim 1, characterized in that: The base frame (12) is equipped with a rotatable main drive shaft (8), and each lifting and positioning component (10) is equipped with a rotatable transmission shaft (9) on one side. The transmission shaft (9) drives the lifting and positioning component (10) to rise and fall, and the two ends of the main drive shaft (8) are connected to each transmission shaft (9).

3. The basket lifting and lowering synchronous structure according to claim 2, characterized in that: The lifting and positioning assembly (10) includes a fixed seat (1), a slidingly fitted lifting seat (2) is provided in the fixed seat (1), a lifting core (3) that can be raised and lowered is provided in the lifting seat (2), a narrow neck step (201) is provided on the inner wall of the lifting seat (2), and a lifting step (303) is provided on the outer wall of the lifting core (3). The lifting core (3) is raised so that the lifting step (303) abuts against the narrow neck step (201) and the lifting seat (2) is raised. The side wall of the fixed seat (1) is provided with multiple sliding slots (101) along the circumference. Each sliding slot (101) is provided with a horizontally retractable tongue block (4). The upper end of the tongue block (4) is provided with a stop surface (402). The fixed seat (1) is provided with a stop platform (102). The tongue block (4) switches between retractable and telescopic states so that the lower end of the lifting seat (2) abuts against the stop surface (402) or the stop platform (102).

4. The basket lifting and lowering synchronous structure according to claim 3, characterized in that: The fixed base (1) is provided with a rotatable baffle (5), and the lower end of the lifting core (3) is provided with a screw part (301). The screw part (301) is threadedly connected to the baffle (5). The baffle (5) rotates so that the lifting platform (303) abuts against the narrow neck platform (201).

5. The basket lifting and lowering synchronous structure according to claim 4, characterized in that: A first bevel gear transmission mechanism (802) is provided between the main drive shaft (8) and the transmission shaft (9), and a second bevel gear transmission mechanism (901) is provided between the transmission shaft (9) and the lifting and positioning assembly (10). The baffle (5) is connected to the second bevel gear transmission mechanism (901).

6. The basket lifting and lowering synchronous structure according to claim 4, characterized in that: The lifting core (3) is provided with an inverted conical surface (302), and the side end of the tongue block (4) is provided with a wedge-shaped surface (401). The lifting core (3) moves down so that the inverted conical surface (302) presses against the wedge-shaped surface (401), and the tongue block (4) retracts so that the stop surface (402) disengages from the lower end of the lifting seat (2). The fixed base (1) is provided with a baffle (5) on the outside, and a third spring (501) is provided on the baffle (5), and the third spring (501) stops the tongue block (4).

7. The basket lifting and lowering synchronous structure according to claim 6, characterized in that: The upper side wall of the lifting core (3) is provided with a third pin hole (304), and a retractable inner pin (305) is provided in the third pin hole (304). The side wall of the lifting seat (2) is provided with a second pin hole (202), and a slidable connecting pin (203) is provided in the second pin hole (202). The side wall of the fixed seat (1) is provided with a first pin hole (103), and a retractable top pin (104) is provided in the first pin hole (103). The lifting core (3) moves down to the third pin. The hole (304) is aligned with the second pin hole (202), and the inner pin (305) is inserted into the second pin hole (202) to make the connecting pin (203) move laterally. The lifting seat (2) and the lifting core (3) move down synchronously until the second pin hole (202) is aligned with the first pin hole (103). The lower end of the lifting seat (2) contacts the stop plate (102), and the top pin (104) pushes the connecting pin (203) so that the inner pin (305) is squeezed out of the second pin hole (202).

8. The basket lifting and lowering synchronous structure according to claim 7, characterized in that: The inner end of the inner pin (305) is provided with an outer cone head (306), the upper end of the lifting core (3) is provided with a sliding hole (309), the sliding hole (309) is provided with a lifting end head (307), a second spring (308) is provided between the bottom end of the sliding hole (309) and the lifting end head (307), and the lifting end head (307) abuts against the outer cone head (306).

9. The basket lifting and lowering synchronous structure according to claim 7, characterized in that: The outer port of the first pin hole (103) is provided with a tail end block (106), and one end of the top pin (104) is provided with an extension post (107). The extension post (107) is slidably sleeved with the tail end block (106). The end of the extension post (107) is provided with a stop nut (108). One side of the stop nut (108) is used to abut against the tail end block (106). The outer side of the extension post (107) is sleeved with a first spring (105). The two ends of the first spring (105) abut against the top pin (104) and the tail end block (106) respectively.

10. The basket lifting and lowering synchronous structure according to claim 4, characterized in that: The inner side of the fixed seat (1) is provided with an inner extension pin (109), the outer wall of the lifting seat (2) is provided with a first guide groove (204), the inner extension pin (109) is slidably engaged with the first guide groove (204), the inner wall of the lifting seat (2) is provided with a guide strip (205), the outer wall of the lifting core (3) is provided with a second guide groove (310), the guide strip (205) is slidably engaged with the second guide groove (310).

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