Elevator car and anti-tilt load elevator

Abstract

The utility model discloses a kind of freight elevator car and prevent deviation load lift freight elevator, freight elevator car includes car body, and car body is connected with main frame movably by roller assembly;Roller assembly includes high, low roller group fixed on the roller seat, the height of high roller group is higher than the height of bottom plate, and the height of low roller group is lower than the height of bottom plate.Prevent deviation load lift freight elevator including main frame, and main frame is equipped with driving device;Driving device makes lifting movement by traction piece driving freight elevator car.The utility model optimizes roller assembly, so that it has better lever effect to disperse power to main frame, ensure the levelness when car operation, ensure operation safety.Power chain or balance chain is used to traction machine, and synchronous transmission shaft is set on sprocket, ensure that power can be synchronously transmitted between the sprocket corresponding to coaxial, ensure car dynamic balance.

Description

Technical Field

[0001] This utility model belongs to the field of freight elevator technology, specifically relating to a freight elevator with anti-eccentric load. Background Technology

[0002] Both the invention patent application with application number 2015109592525 and the utility model patent application with application number 2025211834195 disclose hydraulic lifting freight elevators, which are powered by a pump station and use the meshing of chains and sprockets to lift the car. During use, the applicant found that there are still some drawbacks that need to be improved.

[0003] Users cannot always strictly adhere to regulations when using hydraulic freight elevators. For example, placing goods on one side of the car (such as the side along the length and / or width) will cause the car to tilt due to a shift in its center of gravity. During lifting operations, the load on the traction components (such as steel cables) at the four corners of the car will differ. Over time, the tensile strength and wear of the four steel cables will vary, making replacement troublesome, costly, and affecting usability. Furthermore, the car may deform or twist, and the main load-bearing frame may also deform (such as the twisting of an H-shaped steel structure). Importantly, this poses a significant safety hazard. Therefore, the placement of goods directly affects the car's center of gravity and levelness.

[0004] The existing limit pulley assembly of the car in freight elevators has some structural deficiencies, serving only as a sliding connection. When the load is uneven, it cannot effectively distribute the force to the main load-bearing frame, making the car itself more prone to deformation. During lifting, the tilting of the car is clearly visible to the naked eye.

[0005] Therefore, it is necessary to improve the existing freight elevator car to enhance its ability to prevent eccentric loading. Utility Model Content

[0006] The purpose of this invention is to solve the technical problem of safety hazards posed by the easy deformation of freight elevator cars due to eccentric loading in existing technologies, and to provide a freight elevator car and an anti-eccentric loading lifting freight elevator. It improves upon existing cars and freight elevators, giving the car itself a better anti-eccentric effect. At the same time, the structure of the freight elevator is also improved, increasing its load-bearing capacity and the synchronous traction capacity of the traction components.

[0007] To achieve the above objectives, on the one hand, this utility model provides a freight elevator car, including a car body, wherein the car body is movably connected to the main frame through a roller assembly; Its characteristics are: The roller assembly includes a high roller group and a low roller group fixed on the roller seat. The height of the high roller group is higher than the height of the base plate, and the height of the low roller group is lower than the height of the base plate.

[0008] Preferably, the distance between the high-position roller group and the base plate is equal to the distance between the low-position roller group and the base plate.

[0009] Preferably, the bottom surface of the car body is also provided with limiting rollers, and the limiting rollers are at the same height as the low-position roller group.

[0010] Preferably, the distance between the high-position roller group and the low-position roller group is not less than half the length of the car body.

[0011] Preferably, the distance between the high-position roller group and the low-position roller group is not less than half the width of the car body.

[0012] Preferably, the high-position roller group and the low-position roller group each include a transverse roller and a longitudinal roller.

[0013] On the other hand, this utility model also provides an anti-eccentric load lifting platform, including a main frame fixedly connected to the building, and a drive device is provided on the main frame; Its characteristics are: The drive unit drives the freight elevator car to move up and down via a traction component.

[0014] Preferably, the main frame includes three vertical H-beams located in the width direction of the car body.

[0015] Preferably, the traction component is a drive chain, a balance chain, or a wire rope.

[0016] Preferably, the main frame and / or the car body are provided with sprockets that mesh with the power chain or the balance chain, and a synchronous drive shaft is provided between the coaxially corresponding sprockets, and a universal joint is provided on the synchronous drive shaft.

[0017] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: The roller assembly was optimized to provide better leverage and distribute force to the main frame, ensuring the levelness of the car during operation and guaranteeing operational safety.

[0018] The traction machine uses a drive chain or balance chain, and a synchronous drive shaft is installed on the sprockets to ensure that the corresponding sprockets on the same shaft can transmit power synchronously, thus ensuring the dynamic balance of the car. The universal joint can continue to provide synchronous power transmission even when the synchronous drive shaft has a certain axial displacement, so that all traction components (such as drive chain or balance chain) can operate synchronously. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural schematic of the freight elevator car in this utility model. Figure 1 ; Figure 2 This is a three-dimensional structural schematic of the freight elevator car in this utility model. Figure 2 ; Figure 3 This is a three-dimensional structural diagram of the anti-eccentric loading lifting platform of this utility model. Figure 1 ; Figure 4 This is a three-dimensional structural diagram of the anti-eccentric loading lifting platform of this utility model. Figure 2 ; Figure 5 This is a schematic front view of the structure of the freight elevator car in this utility model; Figure 6 This is a schematic front view of the synchronous drive shaft in this utility model; Figure 7 This is a schematic diagram of the force-bearing principle structure of the freight elevator car in this utility model; Figure 8 This is a schematic diagram of the eccentric loading structure of a freight elevator car in the existing technology.

[0020] In the picture: 100, Car body; 110, Floor plate; 111, Limiting rollers; 120, Roller assembly; 121, Roller seat; 122, High-position roller assembly; 123, Low-position roller assembly; 200, main frame 210, sprocket 220, traction component 230, synchronous drive shaft 231, universal joint 240, drive device. Detailed Implementation

[0021] To make the technical problem solved by this utility model, the technical solution, and the beneficial effects clearer, the following is in conjunction with... Figures 1 to 8 The present invention will be further described in detail with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example 1 refer to Figures 1 to 2 ,as well as Figure 5 , Figure 7 and Figure 8 This embodiment provides a freight elevator car that is an improvement on the existing freight elevator car, especially by optimizing the roller assembly. It makes full use of the lever principle to distribute the off-center load to the main frame, improves the balance of the car body, and ensures the levelness.

[0024] Specifically, it includes: a car body 100, which is mostly a semi-enclosed structure, that is, it has guardrails in the width direction (or both sides) and is open in the length direction (or both ends) to facilitate the entry and exit of goods. The car body 100 is movably connected to the main frame 200 through a roller assembly 120. The roller assembly 120 provides a rolling connection, making the car body 100 smoother when rising and falling.

[0025] The roller assembly 120 is vertically arranged and can be set in the web of the H-beam (i.e., in the groove) or in the flange of the H-beam (i.e., the side wall); the base plate 110 is horizontally arranged.

[0026] The improvement is that the roller assembly 120 includes a high-position roller group 122 and a low-position roller group 123 fixed on the roller seat 121. The height of the high-position roller group 122 is higher than the height of the floor plate 110 of the car body 100, and the height of the low-position roller group 123 is lower than the height of the floor plate 110 of the car body 100. That is, the high-position roller group 122, the low-position roller group 123, and the floor plate 110 of the car body 100 form a triangular connection relationship. In contrast, the traditional roller assembly arrangement distance on the car body 100 is too short (see reference). Figure 8 When the goods are placed off-center, the center of gravity changes, and the bottom plate 110 is subjected to uneven force and is prone to tilting, such as tilting in the length direction or the width direction.

[0027] The high-position roller group 122 and the low-position roller group 123 respectively include several rollers with axial directions of transverse and longitudinal, used to achieve transverse and longitudinal support for the H-beam in the horizontal direction.

[0028] At this time, the base plate 110 acts as a power arm (e.g. Figure 7 (b) In this context, the roller assembly 120 acts as a resistance arm (e.g., ...). Figure 7 If the length of the power arm is greater than the length of the resistance arm (a1 and a2 in the figure), the base plate 110 will easily become skewed. The roller assembly 120 will have difficulty distributing the force to the main frame 200. The local stress on the main frame 200 will increase, that is, the local stress on the flange or web of the H-beam will cause deformation. After a long period of use, the H-beam will need to be replaced, which is very cumbersome and costly.

[0029] In this embodiment, the distance between the high-position roller assembly 122 and the base plate 110 is equal to the distance between the low-position roller assembly 123 and the base plate 110. That is, the height of the base plate 110 is positioned between the high-position roller assembly 122 and the low-position roller assembly 123. This ensures that the vertical resistance experienced by the base plate 110 is consistent under eccentric loading, preventing deformation at one end of the roller seat 121 in the height direction. In contrast, traditional car bodies 100 lack roller assemblies at the bottom, relying solely on the upper roller assembly to distribute force to the main frame, resulting in poor force neutralization.

[0030] Additionally, limiting rollers 111 can be installed on the bottom surface of the car body 100, preferably with reinforcing ribs. The limiting rollers 111 are at the same height as the low-position roller group 123. This allows for connection of the main frame 200 (i.e., the web or flange of the H-beam) from opposite sides in the horizontal direction, resulting in better limiting and support. Of course, the limiting rollers 111 can be installed in the web of the H-beam (i.e., within the groove) or in the flange of the H-beam (i.e., on the side wall).

[0031] When determining the specific location, the distance between the high-position roller assembly 122 and the low-position roller assembly 123 is not less than half the length of the car body 100. This provides better support, especially when the car body 100 experiences eccentric loading in the length direction. This structure extends the length of the roller assembly 120, which is equivalent to increasing the length of the resistance arm, resulting in better anti-eccentric loading performance of the floor plate 110.

[0032] When determining the specific location, the distance between the high-position roller assembly 122 and the low-position roller assembly 123 is not less than half the width of the car body 100. This provides better support, especially when the car body 100 experiences eccentric loading in the width direction. This structure extends the length of the roller assembly 120, effectively increasing the length of the resistance arm, and further improving the anti-eccentric loading effect of the floor plate 110.

[0033] This embodiment improves the anti-eccentric load capacity of the car body 100. The roller assembly 120 has a better lever effect, which can distribute the unbalanced force on the floor 110 to the main frame 200, ensuring the levelness of the car body during operation and ensuring operational safety.

[0034] Example 2 The purpose of this embodiment is to provide a more optimized anti-eccentric lifting platform with better overall support strength. The coaxial sprockets can transmit power synchronously, ensuring that each traction component (such as the power chain or balance chain) can move synchronously even if the center of gravity shifts due to irregular placement of goods.

[0035] refer to Figure 3 and Figure 4 An anti-eccentric load lifting platform includes a main frame 200 fixedly connected to the building, which can be fastened together with expansion bolts to distribute the force throughout the building. The main frame 200 is equipped with a drive device 240 (including a conventional pump station and hydraulic cylinders), which can provide lifting force to the car body 100 at four positions to achieve horizontal lifting of the car.

[0036] The drive unit 240 drives the freight elevator car to move up and down via a traction component 220 (such as a drive chain, balance chain, or wire rope). In this embodiment, a drive chain or balance chain is preferred because it has better support strength, yield strength, and flexural strength than a wire rope. Due to its wound structure, a wire rope will be overstretched after prolonged use, resulting in a larger travel margin. This will cause different loads during lifting and lowering, making the car more prone to tilting.

[0037] refer to Figure 3 and Figure 4 The main frame 200 includes three vertical H-beams located in the width direction of the car body 100. In other words, three vertical H-beams are respectively installed on both sides of the car body 100, resulting in a higher overall load-bearing capacity.

[0038] Preferably, the main frame 200 and / or the car body 100 are provided with sprockets 210 that mesh with the power chain or the balance chain, acting as fixed or movable pulleys. Furthermore, a synchronous drive shaft 230 is provided between the coaxially corresponding sprockets 210 to ensure synchronous transmission and prevent inconsistent rotation angles. To prevent axial misalignment from obstructing transmission, a universal joint 231 is provided on the synchronous drive shaft 230, ensuring that even if the synchronous drive shaft 230 undergoes axial twisting, power can still be transmitted synchronously, guaranteeing the same rotation angle between the sprockets 210.

[0039] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: The traction machine uses a drive chain or balance chain, and a synchronous drive shaft is installed on the sprockets to ensure that the corresponding sprockets on the same shaft can transmit power synchronously, thus ensuring the dynamic balance of the car. The universal joint can continue to provide synchronous power transmission even when the synchronous drive shaft has a certain axial displacement, so that all traction components (such as drive chain or balance chain) can operate synchronously.

[0040] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A freight elevator car, comprising a car body (100), wherein the car body (100) is movably connected to a main frame (200) via a roller assembly (120); Its characteristics are: The roller assembly (120) includes a high roller group (122) and a low roller group (123) fixed on the roller seat (121). The height of the high roller group (122) is higher than the height of the base plate (110), and the height of the low roller group (123) is lower than the height of the base plate (110).

2. The freight elevator car according to claim 1, characterized in that: The distance between the high roller assembly (122) and the base plate (110) is equal to the distance between the low roller assembly (123) and the base plate (110).

3. The freight elevator car according to claim 1 or 2, characterized in that: The bottom surface of the car body (100) is also provided with a limiting roller (111), and the limiting roller (111) is at the same height as the low roller group (123).

4. The freight elevator car according to claim 3, characterized in that: The distance between the high-position roller group (122) and the low-position roller group (123) is not less than half the length of the car body (100).

5. The freight elevator car according to claim 3, characterized in that: The distance between the high-position roller group (122) and the low-position roller group (123) is not less than half the width of the car body (100).

6. The freight elevator car according to claim 1, characterized in that: The high-position roller group (122) and the low-position roller group (123) respectively include a transverse roller and a longitudinal roller.

7. An anti-eccentric load lifting platform, comprising a main frame (200) fixedly connected to a building, wherein a drive device (240) is provided on the main frame (200). Its characteristics are: The drive unit (240) drives the freight elevator car as described in any one of claims 1 to 6 to move up and down via the traction member (220).

8. The anti-eccentric loading lifting platform according to claim 7, characterized in that: The main frame (200) includes three vertical H-beams located in the width direction of the car body (100).

9. The anti-eccentric loading lifting platform according to claim 7, characterized in that: The traction component (220) is a power chain, a balance chain, or a wire rope.

10. The anti-eccentric loading lifting platform according to claim 9, characterized in that: The main frame (200) and / or the car body (100) are provided with sprockets (210) that mesh with the power chain or the balance chain. A synchronous drive shaft (230) is provided between the coaxially corresponding sprockets (210), and a universal joint (231) is provided on the synchronous drive shaft (230).

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