Lift car frame structure

Abstract

A lift car frame structure comprises a lift car bottom plate and stand columns, the lower ends of the stand columns are fixedly connected with one ends of L-shaped connecting plates respectively, the other ends of the L-shaped connecting plates are connected with the lift car bottom plate, and a buffer cross beam, a rope head cross beam and an upper guide shoe cross beam are fixedly connected between the two stand columns. The two ends of the buffer beam, the two ends of the rope head beam and the two ends of the upper guide shoe beam are connected with the opposite side faces of the two stand columns respectively, the buffer beam is located at the near-lower ends of the stand columns, the rope head beam is located on the lower portions of the stand columns and above the buffer beam, the upper guide shoe beam is located at the upper ends of the stand columns, and the car buffers are arranged below the two ends of the buffer beam respectively. The device is compact and reasonable in structure, convenient and fast to assemble and disassemble and light in whole. And the overall structural design requirement can be met, and the structural strength and rigidity requirements are met. The L-shaped connecting plate can bear the bending moment and shear stress caused by the dead weight and load of the lift car. Bending moment caused by self-weight and load of the lift car can be borne by the stand columns and the guide shoes together, and the load of the stand columns is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to elevators, and especially to a car frame structure. Background Art

[0002] In the field of elevator technology, as the core load-bearing component of an elevator, the structure design of the car frame directly affects the safety, stability and comfort of the elevator. The car frame structures in the prior art often have problems such as complex structure, cumbersome assembly, large weight and sub-optimal stress distribution. These problems not only increase the manufacturing cost, but also may affect the overall performance and operation efficiency of the elevator.

[0003] Especially in the field of household platform elevators, due to space limitations and specific usage requirements, higher requirements are put forward for the structure design of the car frame. The existing car frame structures cannot meet the requirements of household elevators for compactness, light weight and easy installation and maintenance. For example, some car frame structures may result in excessive pit requirements due to unreasonable design, or increase the load on the columns due to uneven stress distribution, thus affecting the service life and safety of the elevator.

[0004] In addition, with the continuous development of elevator technology, the requirements for the strength and stiffness of the car frame are also increasing. When the existing car frame structures bear the bending moment and shear stress caused by the self-weight and load of the car, there may be problems of stress concentration or uneven distribution, which may lead to structural damage or performance degradation. Summary of the Invention

[0005] The purpose of the utility model is to provide a car frame structure, and the car frame structure is to solve the technical problems in the prior art such as non-compact structure, inability to bear the bending moment and shear stress caused by the self-weight and load of the car well, and large column load.

[0006] A car frame structure of the utility model includes a car floor and two columns. One end of an L-shaped connecting plate is fixedly connected to the lower end of each of the two columns, and the other end of the L-shaped connecting plate horizontally extends outwards and is connected to the car floor. A buffer beam, a rope socket beam and an upper guide shoe beam are fixedly connected between the two columns. The two ends of the buffer beam, the rope socket beam and the upper guide shoe beam are respectively connected to the opposite side faces of the two columns. The buffer beam is located near the lower end of the column, the rope socket beam is located below the buffer beam at the lower part of the column, the upper guide shoe beam is located at the upper end of the column, and a car buffer is respectively arranged below the two ends of the buffer beam.

[0007] Further, the car floor is of a flat-bottom type.

[0008] Further, the car floor is welded and formed by two transverse rib plates and six longitudinal rib plates.

[0009] Furthermore, four bottom supports are installed on the car floor.

[0010] Furthermore, the L-shaped connecting plate is fixedly connected to the car floor by bolts.

[0011] Furthermore, both ends of the buffer beam, the rope head beam and the upper guide shoe beam are provided with a single arm extending outward, and one or two concave grooves are provided between the two single arms.

[0012] Furthermore, a reinforcement plate is provided at each end of the buffer beam.

[0013] Furthermore, three reinforcing ribs are arranged in parallel and at intervals in the middle of the rope head beam.

[0014] Furthermore, the buffer beam, rope head beam and upper guide shoe beam are all connected to the column through bolts.

[0015] Compared with the prior art, the utility model has positive and obvious effects.

[0016] (1) The structure is compact and reasonable, easy and quick to assemble and disassemble, and the overall weight is light.

[0017] (2) Single-arm column structure

[0018] The two columns 1 are connected by three single-arm structures (buffer beam, rope head beam, and upper guide shoe beam). Single arms extend from both ends and there are one or two concave grooves in the middle. The two columns are connected on one side (connected on the facing sides), which can meet the overall structural design requirements and comply with the structural strength and stiffness requirements.

[0019] (3) L-shaped connecting plate

[0020] An L-shaped connecting plate is welded at the lower end of each column, which can be directly connected to the car floor. The shape is L-shaped and can withstand the bending moment and shear stress caused by the car's own weight and load.

[0021] (4) Car buffer position

[0022] In this embodiment, two car buffers are provided, which are respectively arranged below the two ends of the buffer beam and close to the two columns. Therefore, most of the impact force of the car buffer is directly transmitted to the bottom of the column, reducing the stress of the buffer beam.

[0023] (5) Rope head beam position

[0024] The rope head crossbeam is arranged at the lower part of the column, so that the tensile stress borne by the column is limited to the lower part of the column, reducing the bearing requirements of the column.

[0025] (6) Car floor

[0026] The car floor is of a flat-bottom type and is fixed to the lower end of the column, reducing the requirements for the pit.

[0027] (7) Connection position between the car floor and the column

[0028] The connection position between the car floor and the column is at the bottom end of the column, near the lower guide shoe position. Therefore, the bending moment caused by the self-weight and load of the car can be jointly borne by the column and the guide shoe, greatly reducing the load on the column. Description of the drawings

[0029] Figure 1 It is a front view schematic diagram of a car frame structure of the present utility model.

[0030] Figure 2 It is a first top view schematic diagram of a car frame structure of the present utility model.

[0031] Figure 3 It is a second top view schematic diagram of a car frame structure of the present utility model.

[0032] Figure 4 It is a front view schematic diagram of the column in a car frame structure of the present utility model.

[0033] Figure 5 It is a top view schematic diagram of the column in a car frame structure of the present utility model.

[0034] Figure 6 It is a side view schematic diagram of the column in a car frame structure of the present utility model.

[0035] Figure 7 It is a front view schematic diagram of the buffer crossbeam in a car frame structure of the present utility model.

[0036] Figure 8 It is a top view schematic diagram of the buffer crossbeam in a car frame structure of the present utility model.

[0037] Figure 9 It is a front view schematic diagram of the rope socket crossbeam in a car frame structure of the present utility model.

[0038] Figure 10 It is a top view schematic diagram of the rope socket crossbeam in a car frame structure of the present utility model.

[0039] Figure 11 It is a front view schematic diagram of the upper guide shoe in a car frame structure of the present utility model.

[0040] Figure 12 It is a top view schematic diagram of the upper guide shoe in a car frame structure of the present utility model. Detailed implementation manners

[0041] The present utility model will be further described in conjunction with the embodiments below. However, the present utility model is not limited to these embodiments. Any similar structure and its similar variations of the present utility model shall be included in the protection scope of the present utility model. The use of directions such as up, down, front, back, left, and right in the present utility model is only for the convenience of clear description and does not limit the technical solutions of the present utility model.

[0042] As Figures 1 - 12 shown, a car frame structure of the present utility model includes a car floor 5 and two columns 1. One end of an L-shaped connecting plate 6 is fixedly connected to the lower end of each of the two columns 1. The other end of the L-shaped connecting plate 6 horizontally extends outward and is connected to the car floor 5. A buffer crossbeam 2, a rope socket crossbeam 3, and an upper guide shoe crossbeam 4 are fixedly connected between the two columns 1. The two ends of the buffer crossbeam 2, the rope socket crossbeam 3, and the upper guide shoe crossbeam 4 are respectively connected to the opposite side faces of the two columns 1. The buffer crossbeam 2 is located near the lower end of the column 1. The rope socket crossbeam 3 is located in the lower part of the column 1 and above the buffer crossbeam 2. The upper guide shoe crossbeam 4 is located at the upper end of the column 1. A car buffer is respectively arranged below the two ends of the buffer crossbeam 2.

[0043] Furthermore, the car floor 5 is of a flat-bottom type.

[0044] Furthermore, the car floor 5 is welded and formed by two transverse rib plates and six longitudinal rib plates.

[0045] Furthermore, four bottom supports are installed on the car floor 5 to facilitate the installation of the car wall.

[0046] Furthermore, the L-shaped connecting plate 6 is fixedly connected to the car floor 5 by bolts.

[0047] Furthermore, a single arm 7 extends outward at both ends of the buffer crossbeam 2, the rope socket crossbeam 3, and the upper guide shoe crossbeam 4, and one or two concave grooves 8 are arranged between the two single arms 7.

[0048] Furthermore, a reinforcing plate 9 is respectively arranged at both ends of the buffer crossbeam 2.

[0049] Furthermore, three reinforcing ribs 10 are arranged in parallel at intervals in the middle of the rope socket crossbeam 3.

[0050] Furthermore, the buffer crossbeam 2, the rope socket crossbeam 3, and the upper guide shoe crossbeam 4 are all connected to the column 1 by bolts.

[0051] Specifically, the car buffer, the cover-shaped bottom plate, the flat-bottom type, the bottom support, the reinforcing plate 9, the reinforcing rib 10, etc. in this embodiment all adopt well-known solutions in the prior art, which are already understood by those skilled in the art and will not be elaborated here.

[0052] 1. Usage Method

[0053] 1) Scope of Application

[0054] This mechanism is applicable to home platform elevators (with car walls, without a car top, and without car doors). The rated load does not exceed 400 Kg, and the rated speed does not exceed 0.4 m / s.

[0055] 2) Applicable Places

[0056] Elevators installed in private residences for the exclusive use of a single family member. It can also be installed in a building for non-single-family use as a tool for a single family to enter their residence, but the public or other occupants in the building cannot enter or use it.

[0057] The top height of the hoistway shall not be less than 2850 mm, the pit shall not be less than 150 mm, and the car travel shall not exceed 12 m.

[0058] 2. Operation Mode

[0059] Machine-roomless (or machine-room) traction drive, with a traction ratio of 1:1. A permanent magnet synchronous gearless traction machine is adopted, controlled by a microcomputer, and variable frequency and variable voltage speed regulation is used.

[0060] 3. Structural Composition:

[0061] The car frame is composed of a column 1, a buffer crossbeam 2, a rope socket crossbeam 3, an upper guide shoe crossbeam 4, and a car floor 5.

[0062] 1) Column 1

[0063] The two columns 1 are bent from cold-rolled steel plates with a thickness of 4 mm. At the lower ends of the two columns 1, an L-shaped connecting plate 6 is welded respectively to bear the bending moment and shear stress caused by the load. Upper and lower guide shoes, safety tongs, etc. are installed on the column 1. In this embodiment, an electronic safety tong is adopted (when the elevator runs downward overspeed, the electronic trigger mechanism triggers the safety tong to act, and the safety tong is linked with the mechanical mechanism).

[0064] 2) Buffer Crossbeam 2

[0065] The buffer crossbeam 2 is a support plate bent from a cold-rolled steel plate with a thickness of 6 mm into a channel shape. A steel plate with a thickness of 8 mm is welded at the bottom, with a shape of 124 mm wide at both ends and 40 mm wide in the middle, showing a concave state in the middle to meet the overall structural design requirements. Two reinforcing plates 9 with a thickness of 6 mm are welded near both ends to bear the impact force load of the car buffers on both sides.

[0066] 3) Rope Socket Crossbeam 3

[0067] The rope head crossbeam 3 is made of a channel-shaped support plate bent from 6-mm-thick cold-rolled steel plate. A strip-shaped 8-mm-thick steel plate is welded to the upper part, with a shape of 124 mm wide at both ends, 89 mm wide at the middle rope head plate, and 40 mm wide for the rest, presenting a double-concave state to meet the overall structural design requirements. Three 6-mm-thick steel plates are welded in the middle as stiffeners 10 to bear the tensile load of the rope head assembly.

[0068] 4) Upper guide shoe crossbeam 4

[0069] The upper guide shoe crossbeam 4 is made of a channel-shaped support plate bent from 6-mm-thick cold-rolled steel plate. A 5-mm-thick steel plate is welded to each of its upper and lower parts, with a shape of 124 mm wide at both ends and 40 mm wide in the middle, presenting a middle-concave shape to meet the overall structural design requirements.

[0070] 5) Car floor 5

[0071] The car floor 5 is welded by a cover-shaped floor bent from 2-mm-thick cold-rolled steel plate, two fixing plates bent from steel plates into angle steel shapes, two transverse rib plates bent from 3-mm-thick cold-rolled steel plates, and six longitudinal rib plates bent from 1.5-mm-thick cold-rolled steel plates.

[0072] Advantages of the present utility model:

[0073] (1) The structure is compact and reasonable, the installation and disassembly are convenient and fast, and the whole is light.

[0074] (2) Single-arm type column 1 structure

[0075] The two columns 1 are connected by three single-arm structures (buffer crossbeam 2, rope head crossbeam 3, upper guide shoe crossbeam 4). The single arms 7 at both ends extend, and there is one or two concave grooves 8 in the middle. The two columns 1 are connected on one side (the opposite side surfaces are connected), which can meet the overall structural design requirements and meet the requirements of structural strength and stiffness.

[0076] (3) L-shaped connecting plate 6

[0077] An L-shaped connecting plate 6 is welded to the lower end of each of the two columns 1, which can be directly connected to the car floor 5. The shape is L-shaped, and it can bear the bending moment and shear stress caused by the self-weight and load of the car.

[0078] (4) Position of car buffer

[0079] Two car buffers are provided in this embodiment, which are respectively arranged below both ends of the buffer crossbeam 2 and close to the two columns 1. Therefore, most of the impact force of the car buffer is directly transmitted to the bottom of the column 1, reducing the stress of the buffer crossbeam 2.

[0080] (5) Position of rope head crossbeam 3

[0081] The rope head crossbeam 3 is arranged at the lower part of the column 1, confining the tensile stress borne by the column 1 to the lower part of the column 1 and reducing the bearing requirement of the column 1.

[0082] (6) Car floor 5

[0083] The car floor 5 is of a flat-bottom type and is fixed to the lower end of the column 1, reducing the requirement for the pit.

[0084] (7) Connection position between the car floor 5 and the column 1

[0085] The connection position between the car floor 5 and the column 1 is at the bottom end of the column 1, near the lower guide shoe position. Therefore, the bending moment caused by the dead weight and load of the car can be jointly borne by the column 1 and the guide shoe, greatly reducing the load on the column 1.

Claims

1. A car frame structure, characterized in that, It includes a car floor and two columns. At the lower ends of the two columns, one end of an L-shaped connecting plate is fixedly connected respectively. The other end of the L-shaped connecting plate extends horizontally outward and is connected to the car floor. A buffer crossbeam, a rope socket crossbeam, and an upper guide shoe crossbeam are fixedly connected between the two columns. The two ends of the buffer crossbeam, the rope socket crossbeam, and the upper guide shoe crossbeam are respectively connected to the opposite side surfaces of the two columns. The buffer crossbeam is located near the lower end of the column. The rope socket crossbeam is located in the lower part of the column and above the buffer crossbeam. The upper guide shoe crossbeam is located at the upper end of the column. A car buffer is respectively arranged below the two ends of the buffer crossbeam.

2. The car frame structure according to claim 1, wherein, The car floor is of flat-bottom type.

3. A car frame structure according to claim 1, characterized in that, The car floor is welded and formed by two transverse rib plates and six longitudinal rib plates.

4. A car frame structure according to claim 1, characterized in that Four bottom supports are installed on the car floor.

5. A car frame structure according to claim 1, characterized in that, The L-shaped connecting plate is fixedly connected to the car floor by bolts.

6. A car frame structure according to claim 1, characterized in that At both ends of the buffer crossbeam, the rope socket crossbeam, and the upper guide shoe crossbeam, a single arm extends outward, and one or two concave grooves are arranged between the two single arms.

7. A car frame structure according to claim 1, characterized in that, A reinforcing plate is respectively arranged at both ends of the buffer crossbeam.

8. A car frame structure according to claim 1, characterized in that, Three reinforcing ribs are arranged in parallel at intervals in the middle of the rope socket crossbeam.

9. A car frame structure according to claim 1, characterized in that, The buffer crossbeam, the rope socket crossbeam, and the upper guide shoe crossbeam are all connected to the column by bolts.

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