Adjustable steel belt type integrated household ladder car bottom

Abstract

This invention relates to the field of home elevator technology, specifically to an adjustable steel belt integrated home elevator car bottom, comprising: a base plate, and a fixing plate and a baffle fixed to the side wall of the base plate; a shock-absorbing mechanism disposed on the fixing plate, wherein a guide wheel is connected to the shock-absorbing mechanism; a telescopic pushing mechanism disposed on the shock-absorbing mechanism, wherein a plurality of first arc-shaped plates distributed circumferentially at equal intervals are connected to the telescopic pushing mechanism, and the shock-absorbing mechanism can adjust the spacing between the first arc-shaped plates through the telescopic pushing mechanism; and a trigger support mechanism disposed on the baffle, wherein a plurality of second arc-shaped plates distributed circumferentially at equal intervals are connected to the trigger support mechanism, wherein a steel belt connected to the first arc-shaped plates is sleeved on the second arc-shaped plates. When the guide wheel is subjected to force, the shock-absorbing mechanism can drive the telescopic pushing mechanism to move, thereby controlling the deformation of the steel belt to control the movement of the trigger support mechanism, thereby providing nonlinear support force to the guide wheel.

Description

Technical Field

[0001] This invention relates to the field of home elevator technology, specifically an adjustable steel belt integrated home elevator car bottom. Background Technology

[0002] As an important vertical transportation tool in modern residences, villas and other private places, the smoothness of operation, quietness and riding comfort are the core indicators for measuring the quality of home elevators.

[0003] Since the space in a home elevator shaft is usually relatively small and often adjacent to the living space, any abnormal vibration or swaying during operation not only directly affects the comfort of passengers, but may also cause structural noise, accelerated wear of components, and even safety hazards in the long run. Therefore, the key to ensuring the stability of home elevator operation lies in effectively suppressing the lateral vibration and swaying of the car caused by factors such as traction system fluctuations, guide rail installation errors, and changes in passenger movement load during the start-up, braking, and operation of the elevator car.

[0004] Currently, in order to ensure operational stability, home elevators generally have guide and shock absorption devices installed at the bottom or top of the car. The guide wheels are supported by elastic supports, thereby absorbing some horizontal vibrations.

[0005] However, the support force provided to the guide wheel by the existing elastic damping is usually fixed. If the stiffness is set too softly, although it can effectively filter out minor vibrations, it will not provide enough support when dealing with sudden large swaying, which will cause the car to swing too much and easily lead to safety accidents. If the stiffness is set too hard, although it can suppress large swaying, it will transmit a large number of high-frequency minor vibrations to the car, which will damage the smoothness and quietness of daily operation. Summary of the Invention

[0006] The purpose of this invention is to provide an adjustable steel strip integrated home ladder car bottom to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An adjustable steel belt integrated home ladder car bottom includes:

[0009] The base plate, and the fixing plates and baffles fixed to the side walls of the base plate;

[0010] Also includes:

[0011] A shock-absorbing mechanism is mounted on the fixed plate, and guide wheels are connected to the shock-absorbing mechanism.

[0012] A telescopic pushing mechanism is provided on the shock absorption mechanism. A plurality of first arc-shaped plates are connected to the telescopic pushing mechanism in a circumferentially equidistant manner. The shock absorption mechanism can adjust the spacing between the first arc-shaped plates through the telescopic pushing mechanism.

[0013] A trigger support mechanism is provided on the baffle. Multiple second arc-shaped plates are connected to the trigger support mechanism and are distributed circumferentially. A steel strip connected to the first arc-shaped plate is sleeved on the second arc-shaped plate. The second arc-shaped plate can move when the steel strip deforms to change the support force provided by the trigger support mechanism to the second arc-shaped plate.

[0014] As a further aspect of the present invention: the shock absorption mechanism includes a fixed sleeve fixed to the fixed plate, a movable rod axially sliding inside the fixed sleeve, and a limiting ring fixed on the movable rod that abuts against the fixed sleeve.

[0015] As a further embodiment of the present invention: the shock absorption mechanism further includes a support plate fixed to the end of the movable rod, the support plate being fixedly connected to the guide wheel, a first spring being sleeved on the movable rod, the two ends of the first spring being respectively abutting against the fixed plate and the support plate, and a push rod penetrating the fixed plate being fixed on the support plate.

[0016] As a further embodiment of the present invention: the telescopic pushing mechanism includes a first support plate fixed on the fixed sleeve, and a plurality of first sliding grooves are formed on the first support plate in a circumferentially equidistant manner;

[0017] It also includes a sliding component and an elastic component disposed on the fixed sleeve and connected to the first slide groove.

[0018] As a further embodiment of the present invention: the sliding component includes a first sliding block slidably mounted on the first sliding groove, a first connecting plate fixed on the first sliding block, and the first connecting plate being fixedly connected to the first arc-shaped plate.

[0019] As a further embodiment of the present invention: the elastic component includes a first movable plate that slides along the axial direction of the fixed sleeve, a first connecting rod that is hinged to the first sliding block is mounted on the first movable plate, and a second spring is mounted on the fixed sleeve, with the two ends of the second spring abutting against the first movable plate and the first support plate, respectively.

[0020] As a further embodiment of the present invention: the trigger support mechanism includes a fixed rod fixed on the baffle, and a second support plate is fixed to the end of the fixed rod. A plurality of second sliding grooves are formed on the second support plate in a circumferentially equidistant manner.

[0021] It also includes a driven component and a follower component disposed on the fixed rod and connected to the second support plate.

[0022] As a further embodiment of the present invention: the driven component includes a second sliding block slidably installed in the second sliding groove, a second connecting plate is fixed on the second sliding block, and the second connecting plate is fixedly connected to the second arc-shaped plate.

[0023] As a further embodiment of the present invention: the follower component includes a second movable plate that slides along the axial direction of the fixed rod, and a second connecting rod that is hinged to the second movable plate and hinged to the second sliding block.

[0024] As a further embodiment of the present invention: the baffle is further provided with an adjustment component, the adjustment component includes a fixing ring fixed on the fixing rod, a cylinder is fixed on the baffle, the telescopic end of the cylinder is fixedly connected to the fixing ring, and a third spring is sleeved on the fixing rod, the two ends of the third spring abutting against the second movable plate and the baffle respectively.

[0025] Compared with the prior art, the beneficial effects of the present invention are: when the elevator experiences normal minor vibrations or swaying, the first spring only undergoes slight compression deformation to provide buffering. At this time, the system exhibits low equivalent stiffness, which can gently absorb energy, efficiently filter out high-frequency minor vibrations, ensure the elevator's daily operation is extremely smooth and quiet, and at the same time avoid abnormal wear and noise caused by continuous hard contact or excessive preload between the guide wheel and the guide rail.

[0026] By coordinating the telescopic push mechanism and the trigger support mechanism, the second and third springs can be quickly intervened when the sway amplitude exceeds the set threshold, and can provide support force simultaneously. This allows for the application of a strong and rapidly increasing suppressive force during large-amplitude sudden swaying, quickly limiting the sway amplitude of the elevator car to a safe range and effectively preventing problems such as operational instability and collision with the shaft caused by resonance or impact.

[0027] The real-time deformation of the steel belt ensures that the compression processes of the second and third springs occur almost synchronously. The nonlinear restoring forces generated by the two springs are instantaneously superimposed through the closed force chain formed by the steel belt, thereby generating an explosively growing overall support force that far exceeds the simple superposition of individual springs. This can quickly suppress sudden large-amplitude swaying at the initial stage, greatly shortening the swaying time and amplitude of the car, and significantly improving the passengers' sense of security and the system's reliability in responding to impacts. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of one embodiment of an adjustable steel belt integrated home ladder car bottom.

[0029] Figure 2 This is a structural schematic diagram of another angle in one embodiment of an adjustable steel strip integrated household ladder car bottom.

[0030] Figure 3 This is a schematic diagram of the structure of part of the shock absorption mechanism and guide wheels in one embodiment of an adjustable steel belt integrated household ladder car bottom.

[0031] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0032] Figure 5 This is a schematic diagram showing the connection relationship between the shock absorption mechanism, the telescopic pushing mechanism, and the trigger support mechanism in one embodiment of an adjustable steel strip integrated household ladder car bottom.

[0033] Figure 6 for Figure 5 Another structural diagram from a different angle.

[0034] Figure 7 This is a schematic diagram of the shock absorption mechanism and telescopic push mechanism in one embodiment of an adjustable steel belt integrated household ladder car bottom.

[0035] Figure 8 This is an exploded structural diagram of part of the shock absorption mechanism in one embodiment of an adjustable steel belt integrated household ladder car bottom.

[0036] Figure 9 This is an exploded structural diagram of the telescopic pushing mechanism in one embodiment of an adjustable steel belt integrated household ladder car bottom.

[0037] Figure 10 This is a schematic diagram of the trigger support mechanism in one embodiment of an adjustable steel strip integrated household ladder car bottom.

[0038] In the diagram: 1. Base plate; 2. Fixed plate; 3. Fixed sleeve; 4. Movable rod; 401. Limiting ring; 5. Support plate; 6. Guide wheel; 7. First spring; 8. Push rod; 9. First support plate; 901. First slide groove; 10. First sliding block; 11. First arc plate; 12. First movable plate; 13. First connecting rod; 14. Second spring; 15. Baffle; 16. Fixed rod; 1601. Fixed ring; 17. Second support plate; 1701. Second slide groove; 18. Second sliding block; 19. Second arc plate; 20. Steel strip; 21. Second movable plate; 22. Second connecting rod; 23. Third spring; 24. First connecting plate; 25. Second connecting plate; 26. Cylinder. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0041] Please see Figures 1-10 In this embodiment of the invention, an adjustable steel strip integrated home ladder car bottom includes:

[0042] The base plate 1, and the fixing plate 2 and the baffle 15 fixed to the side wall of the base plate 1;

[0043] Also includes:

[0044] A shock-absorbing mechanism is mounted on the fixed plate 2, and a guide wheel 6 is connected to the shock-absorbing mechanism.

[0045] A telescopic pushing mechanism is provided on the shock absorption mechanism. A plurality of first arc-shaped plates 11 are connected to the telescopic pushing mechanism and are distributed equidistantly in a circle. The shock absorption mechanism can adjust the spacing between the first arc-shaped plates 11 through the telescopic pushing mechanism.

[0046] A trigger support mechanism is provided on the baffle 15. A plurality of second arc-shaped plates 19 are connected to the trigger support mechanism and are distributed circumferentially. A steel strip 20 connected to the first arc-shaped plate 11 is sleeved on the second arc-shaped plate 19. The second arc-shaped plate 19 can move when the steel strip 20 is deformed to change the support force provided by the trigger support mechanism to the second arc-shaped plate 19.

[0047] Specifically, during elevator operation, guidance is typically required to ensure stability. However, if rigid guidance is used directly, the guide components may deform due to excessive force or friction damage when the elevator sways under external forces. Therefore, elastic support is usually used for guidance. This application achieves guidance by sliding the guide wheel 6 into a guide rail installed inside the elevator shaft. During normal guidance, i.e., when the elevator is running normally or experiencing slight swaying, the shock absorption mechanism continuously provides support to the guide wheel 6, thereby counteracting small-amplitude swaying and ensuring the stability of the elevator operation. If passengers jump inside the elevator, or for other reasons... When the elevator sways significantly, the guide wheel 6 can transmit the force to the damping mechanism, which in turn drives the telescopic push mechanism to move. This controls the deformation of the steel belt 20, which in turn drives the trigger support mechanism to move. With the combined action of the telescopic push mechanism and the trigger support mechanism, the support force on the guide wheel 6 is rapidly increased in a non-linear manner to ensure that the guide wheel 6 receives sufficient reaction force, thereby quickly suppressing the swaying. In this way, a smaller force can be applied to the guide wheel 6 during normal elevator use to prevent excessive friction, while a larger support force can be quickly provided when the elevator sways significantly, thus maintaining the stability of the elevator operation.

[0048] Please see Figures 1-8 The shock absorption mechanism includes a fixed sleeve 3 fixed on the fixed plate 2, a movable rod 4 axially sliding inside the fixed sleeve 3, a limiting ring 401 fixed on the movable rod 4 and engaging with the fixed sleeve 3, the shock absorption mechanism also includes a support plate 5 fixed to the end of the movable rod 4, the support plate 5 is fixedly connected to the guide wheel 6, a first spring 7 is sleeved on the movable rod 4, the two ends of the first spring 7 abut against the fixed plate 2 and the support plate 5 respectively, and a push rod 8 penetrating the fixed plate 2 is fixed on the support plate 5.

[0049] In detail, the guide wheel 6 is slidably connected to the guide rail in the elevator shaft. In order to avoid damage to the guide wheel 6 due to elevator shaking under rigid contact, elastic support needs to be provided to the guide wheel 6. In the initial state, the distance between the support plate 5 and the fixed plate 2 is the largest, that is, the guide wheel 6 is located at the end of the stroke away from the fixed plate 2. The extension of the first spring 7 in its natural state is greater than the maximum distance between the support plate 5 and the fixed plate 2. Therefore, the first spring 7 is in a pre-compressed state and always provides the support plate 5 with a thrust in the direction away from the fixed plate 2. In this state, the movable rod 4 controls the limit ring 401 and the fixed sleeve 3 to be in abutting state.

[0050] When the elevator is running, swaying is inevitable. If the swaying amplitude is small, the force will be transmitted to the guide wheel 6, reducing the distance between the support plate 5 and the fixed plate 2, thereby compressing the first spring 7. At the same time, the support plate 5 will also drive the movable rod 4 to move, causing the limit ring 401 to separate from the fixed sleeve 3. Since the reaction force provided by the first spring 7 when it is compressed is non-linearly increasing, the movement stroke of the support plate 5 is small. Therefore, the first spring 7 is sufficient to cope with small-amplitude swaying. If the swaying amplitude is large, the movement stroke of the support plate 5 is large. The support plate 5 will drive the telescopic push mechanism to move through the push rod 8, thereby quickly increasing the support force provided to the guide wheel 6 to suppress the swaying range within a safe range.

[0051] Please see Figures 4-9 The telescopic pushing mechanism includes a first support plate 9 fixed on the fixed sleeve 3, on which a plurality of first sliding grooves 901 are formed in a circumferentially equidistant manner; it also includes a sliding component and an elastic component disposed on the fixed sleeve 3 and connected to the first sliding grooves 901. The sliding component includes a first sliding block 10 slidably mounted on the first sliding groove 901, on which a first connecting plate 24 is fixed, and the first connecting plate 24 is fixedly connected to the first arc-shaped plate 11. The elastic component includes a first movable plate 12 that slides along the axial direction of the fixed sleeve 3, on which a first connecting rod 13 is hinged to the first movable plate 12 and hinged to the first sliding block 10. A second spring 14 is sleeved on the fixed sleeve 3, and the two ends of the second spring 14 abut against the first movable plate 12 and the first support plate 9, respectively.

[0052] Please see Figure 5 , Figure 6 , Figure 10 The trigger support mechanism includes a fixed rod 16 fixed to the baffle 15, a second support plate 17 fixed to the end of the fixed rod 16, and a plurality of second sliding grooves 1701 circumferentially distributed on the second support plate 17; it also includes a driven component and a follower component disposed on the fixed rod 16 and connected to the second support plate 17. The driven component includes a second sliding block 18 slidably installed in the second sliding groove 1701, a second connecting plate 25 fixed on the second sliding block 18, and the second connecting plate 25 fixedly connected to the second arc plate 19. The follower component includes a second movable plate 21 that slides along the axial direction of the fixed rod 16, and a second connecting rod 22 hinged to the second movable plate 21 and hinged to the second sliding block 18.

[0053] Please see Figure 10The baffle 15 is also provided with an adjustment component, which includes a fixing ring 1601 fixed on the fixing rod 16. A cylinder 26 is fixed on the baffle 15. The telescopic end of the cylinder 26 is fixedly connected to the fixing ring 1601. A third spring 23 is sleeved on the fixing rod 16. The two ends of the third spring 23 abut against the second movable plate 21 and the baffle 15, respectively.

[0054] Please see Figure 5 , Figure 6 Furthermore, when the elevator is not subjected to shaking force, the distance between the support plate 5 and guide wheel 6 and the fixed plate 2 is the largest. In this case, the push rod 8 and the first movable plate 12 are separated. At this time, the first movable plate 12 is located at the end of its stroke away from the first support plate 9, that is, the distance between the first movable plate 12 and the first support plate 9 is the largest. The extension of the second spring 14 in its natural state is greater than the maximum distance between the first movable plate 12 and the first support plate 9. Therefore, the second spring 14 is in a pre-compressed state and always provides the first movable plate 12 with a thrust away from the first support plate 9. Under the action of the first movable plate 12, the first connecting rod 13 controls the multiple first sliding blocks 10 to be located at the end of their stroke on one side of the first slide groove 901, that is, the distance between the multiple first sliding blocks 10 is the smallest. The first sliding blocks 10 will control the distance between the multiple first arc plates 11 to be the smallest through the first connecting plate 24, that is, the wheel-shaped pulley formed by the combination of the multiple first arc plates 11 is the smallest.

[0055] In this state, the cylinder 26 controls the fixed ring 1601 to be located at the end of its stroke near the side of the baffle 15, and the second movable plate 21 to be located at the end of its stroke near the direction of the second support plate 17. That is, the distance between the second movable plate 21 and the fixed ring 1601 is the largest. The extension of the third spring 23 in its natural state is greater than the maximum distance between the second movable plate 21 and the fixed ring 1601. Therefore, the third spring 23 is in a pre-compressed state and always provides the second movable plate 21 with a thrust in the direction of the second support plate 17. Under the action of the second movable plate 21, the second connecting rod 22 controls the multiple second sliding blocks 18 to be located at the end of their stroke on the side of the second slide groove 1701. That is, the distance between the multiple second sliding blocks 18 is the largest. The second sliding blocks 18 will control the distance between the multiple second arc plates 19 to be the largest through the second connecting plate 25. That is, the wheel-shaped pulley formed by the combination of the multiple second arc plates 19 is the largest.

[0056] Under the action of the first arc plate 11 and the second arc plate 19, the steel belt 20 is kept taut. When the elevator shakes a lot, the gap between the guide wheel 6 and the fixed plate 2 decreases. The guide wheel 6 controls the push rod 8 to move to the position of abutting against the first movable plate 12 through the support plate 5, and overcomes the combined force provided by the second spring 14 and the third spring 23, thereby driving the first movable plate 12 to move away from the fixed plate 2. The movement of the first movable plate 12 directly compresses the second spring 14 between it and the first support plate 9, further increasing the compression of the second spring 14 and the nonlinear restoring force generated therefrom rapidly increases. On the other hand, the first movable plate 12 converts the axial movement into a radial thrust on each first sliding block 10 through multiple first connecting rods 13 hinged to it. This thrust forces all the first sliding blocks 10 to slide synchronously from the initial position close to the center towards the direction away from each other along their respective first sliding grooves 901.

[0057] The radial movement of the first sliding block 10 causes the multiple first arc-shaped plates 11 fixed thereto to expand outward synchronously through the first connecting plate 24, so that the effective diameter of the wheel-shaped pulley formed by the combination of multiple first arc-shaped plates 11 increases rapidly. Since the total length of the steel belt 20 connected between the first arc-shaped plate 11 and the second arc-shaped plate 19 remains basically unchanged within the elastic range, the increase in the diameter of the first arc-shaped plate 11 will inevitably cause the steel belt 20 to be stretched outward and generate significant deformation tension.

[0058] The tension is transmitted through the steel belt 20 to all the second arc plates 19 on the other side, forming a radial pull that forces these second arc plates 19 to converge toward the center. Driven by this pull, each second arc plate 19 overcomes the preload of the third spring 23 in the initial state and drives its corresponding second sliding block 18 to slide along the second slide groove 1701 through the second connecting plate 25, and slides synchronously from the initial position away from the center toward the direction of mutual approach.

[0059] The inward sliding of the second sliding block 18, through the second connecting rod 22 hinged to it, converts the radial motion into an axial thrust on the second movable plate 21. This thrust pushes the second movable plate 21 to overcome the preload of the third spring 23, causing the second movable plate 21 to move axially along the fixed rod 16 toward a direction away from the second support plate 17, thereby further compressing the third spring 23. The further compression of the third spring 23 causes its stored elastic potential energy and the nonlinear restoring force it generates to increase sharply.

[0060] In this way, when the elevator is swaying significantly, the deformation of the steel belt 20 can simultaneously compress the second spring 14 and the third spring 23. Since the second spring 14 and the third spring 23 themselves store a certain amount of elastic potential energy, the rate of increase of the reaction force they provide will become faster and faster as the amount of compression increases. Under the combined effect of the elastic forces of the second spring 14 and the third spring 23, a powerful dynamic support force is finally formed on the support plate 5 and the guide wheel 6, which is opposite to the swaying direction and is amplified nonlinearly with the displacement of the guide wheel 6. This achieves the effect of providing the elevator with shock absorption and sway suppression, resulting in a soft start and hard stop.

[0061] Specifically, when dealing with minor swaying, the energy can be absorbed by the elastic deformation of the first spring 7. The damping system exhibits a mild linear stiffness, avoiding abnormal wear caused by rigid contact or excessive preload between the guide wheel 6 and the guide rail. When the swaying intensifies and exceeds the buffer threshold of the first spring 7, the second spring 14 and the third spring 23 quickly intervene and can provide support force simultaneously. This allows for the application of a strong and rapidly increasing damping force during large-amplitude sudden swaying, quickly limiting the swaying amplitude of the elevator car to a safe range and effectively preventing problems such as operational instability and collision with the shaft caused by resonance or impact.

[0062] In addition, by adjusting the position of the fixed ring 1601 relative to the baffle 15 by the cylinder 26, the initial pre-compression of the third spring 23 can be changed, thereby enabling different dynamic support characteristic curves to be preset according to the load, speed or operating conditions of different elevators.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0064] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An adjustable steel belt integrated home ladder car bottom, comprising: The base plate, and the fixing plates and baffles fixed to the side walls of the base plate; Its characteristic is that it further includes: A shock-absorbing mechanism is mounted on the fixed plate, and guide wheels are connected to the shock-absorbing mechanism. A telescopic pushing mechanism is provided on the shock absorption mechanism. A plurality of first arc-shaped plates are connected to the telescopic pushing mechanism in a circumferentially equidistant manner. The shock absorption mechanism can adjust the spacing between the first arc-shaped plates through the telescopic pushing mechanism. A trigger support mechanism is provided on the baffle. Multiple second arc-shaped plates are connected to the trigger support mechanism and are distributed circumferentially. A steel strip connected to the first arc-shaped plate is sleeved on the second arc-shaped plate. The second arc-shaped plate can move when the steel strip deforms to change the support force provided by the trigger support mechanism to the second arc-shaped plate.

2. The adjustable steel strip integrated household ladder car bottom according to claim 1, characterized in that, The shock absorption mechanism includes a fixed sleeve fixed to the fixed plate, a movable rod that slides axially inside the fixed sleeve, and a limiting ring that abuts against the fixed sleeve is fixed on the movable rod.

3. The adjustable steel strip integrated household ladder car bottom according to claim 2, characterized in that, The shock absorption mechanism also includes a support plate fixed to the end of the movable rod. The support plate is fixedly connected to the guide wheel. A first spring is sleeved on the movable rod. The two ends of the first spring abut against the fixed plate and the support plate, respectively. A push rod that penetrates the fixed plate is fixed on the support plate.

4. The adjustable steel strip integrated household ladder car bottom according to claim 3, characterized in that, The telescopic pushing mechanism includes a first support plate fixed on the fixed sleeve, and a plurality of first sliding grooves are formed on the first support plate in a circumferentially equidistant manner. It also includes a sliding component and an elastic component disposed on the fixed sleeve and connected to the first slide groove.

5. The adjustable steel strip integrated household ladder car bottom according to claim 4, characterized in that, The sliding assembly includes a first sliding block slidably mounted on the first sliding groove, a first connecting plate fixed on the first sliding block, and the first connecting plate being fixedly connected to the first arc-shaped plate.

6. The adjustable steel strip integrated household ladder car bottom according to claim 5, characterized in that, The elastic component includes a first movable plate that slides axially along the fixed sleeve. A first connecting rod that is hinged to the first sliding block is mounted on the first movable plate. A second spring is mounted on the fixed sleeve, and the two ends of the second spring abut against the first movable plate and the first support plate, respectively.

7. The adjustable steel strip integrated household ladder car bottom according to claim 1, characterized in that, The trigger support mechanism includes a fixed rod fixed to the baffle, and a second support plate is fixed to the end of the fixed rod. The second support plate has a plurality of second sliding grooves that are circumferentially distributed. It also includes a driven component and a follower component disposed on the fixed rod and connected to the second support plate.

8. The adjustable steel strip integrated household ladder car bottom according to claim 7, characterized in that, The driven component includes a second sliding block that is slidably installed in the second slide groove, a second connecting plate that is fixed on the second sliding block, and the second connecting plate that is fixedly connected to the second arc-shaped plate.

9. The adjustable steel strip integrated household ladder car bottom according to claim 8, characterized in that, The follower assembly includes a second movable plate that slides along the axial direction of the fixed rod, and a second connecting rod that is hinged to the second sliding block is mounted on the second movable plate.

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