Car frame of elevator without machine room

Abstract

The car frame of the elevator without the machine room comprises a car frame body and a car bottom, and the car frame body comprises an upper beam, a straight beam, a lower beam, a guide shoe and an oil cup. The two ends of the upper beam are fixedly connected with the straight beams on the two sides through bolts, and the guide shoes and the oil cups are installed at the two ends of the upper beam respectively. The lower beam is composed of a first lower beam bent part, a second lower beam bent part and a wheel beam which are arranged side by side and connected with one another, the car bottom wheel is installed between the second lower beam bent part and the wheel beam, the two ends of the lower beam are fixedly connected with the straight beams on the two sides through bolts respectively, and guide shoes are installed at the two ends of the lower beam. The first lower beam bent piece, the second lower beam bent piece and the wheel beam are connected with the middle of the bottom face of the car bottom in a fastened mode through bolts. According to the elevator car frame without the machine room, the bearing of the car bottom wheel only bears radial force and does not bear axial force, and the problem of the service life of the bearing is effectively solved; meanwhile, the car bottom wheels are hidden in the middle of the second lower beam bent piece wheel beam, the space size of a pit can be released, and space is saved.

Description

Technical Field

[0001] The utility model relates to a machine room-less elevator car frame used in the field of elevator equipment safety. Background Art

[0002] An elevator is a permanent transportation device that serves several specific floors in a building and whose car runs on at least two rows of rigid tracks that are perpendicular to the horizontal plane or inclined at an angle of less than 15° to the plumb line. The car frame is the load-bearing structure of the car. The load (self-weight and load) of the car is transferred to the traction wire rope by it. When the safety clamp is activated or the bottom hits the buffer, it also has to bear the reaction force generated thereby.

[0003] At present, elevators on the market generally adopt a traction ratio of 2:1 structure, that is, a sheave assembly is installed on the car and the counterweight, and the car and the counterweight are moved up and down by winding the traction wire rope around the car upper wheel assembly (moving pulley), the main pulley (static pulley), the return rope pulley (static pulley) and the counterweight pulley (moving pulley). For machine room-less elevators, in order to meet the national standard requirements for the top floor space, the car upper wheel assembly generally adopts the car bottom wheel form, that is, the wheel assembly is installed at the bottom of the car.

[0004] Patent application number 201320244411.6 discloses a machine room-less car frame, which includes: two rows of vertical side beams, an upper cross beam, and a lower cross beam, namely two return rope pulleys. The two vertical side beams are arranged in parallel, and the upper cross beam and the lower cross beam connect the two vertical side beams. The return rope pulley is arranged below the lower cross beam. It is characterized in that the upper cross beam and the lower cross beam are an integral structure and are fixedly connected to the vertical side beams by fixing bolts and safety pins, and the return rope pulley is bolted to the lower cross beam through a wheel frame.

[0005] The machine room-less car frame can bear the load of the machine room-less elevator with a traction ratio of 2:1 and realize the up and down movement of the car. However, its car return rope pulley is connected to the lower crossbeam bolts through a wheel frame. At this time, the return rope pulley is a cantilever structure. When the wire rope is wrapped around the car load, the return rope pulley will be subjected to axial force, which will greatly affect the life of the wheel assembly bearing. It is an improvement goal for technicians. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a machine room-less elevator car frame, which can realize the reliable installation and use of the machine room-less elevator.

[0007] A technical solution to achieve the above object is: a machine room-less elevator car frame, comprising a car frame and a car bottom;

[0008] The car frame includes an upper beam, a straight beam, a lower beam, a guide shoe and an oil cup; the two ends of the upper beam are fastened to the straight beams on both sides with bolts, and the guide shoes and the oil cup are installed on the upper ends respectively, and the straight beam is connected to the side of the car bottom; the lower beam is composed of a first lower beam bent part, a second lower beam bent part and a wheel beam arranged side by side, and the three are connected to each other, and the car bottom wheel is installed between the second lower beam bent part and the wheel beam, and the two ends of the lower beam are fastened to the straight beams on both sides with bolts respectively, and the two ends of the lower beam are installed with guide shoes, and the first lower beam bent part, the second lower beam bent part and the wheel beam are fastened to the middle part of the bottom surface of the car bottom by bolts respectively.

[0009] Furthermore, the wheel axle frame of the car bottom wheel is arranged on the inner side of the second lower beam bent piece and the wheel beam, so that the end surface projection range of the car bottom wheel is partially covered by the second lower beam bent piece and the wheel beam, and the bottom of the car bottom wheel extends downward from the second lower beam bent piece and the wheel beam.

[0010] Furthermore, the car frame also includes a diagonal tie rod group, which is symmetrically arranged on the straight beams on both sides. The diagonal tie rod group consists of two diagonal tie rods, one end of which is bolted to the straight beam, and the other end is bolted to the side end of the car bottom.

[0011] Furthermore, the connection parts of the two diagonal braces of the diagonal brace group and the straight beam are arranged up and down.

[0012] Furthermore, safety clamps are provided at both ends of the lower beam.

[0013] The utility model discloses a car frame for a machine room-less elevator. The lower beam adopts the form of three beams. The first lower beam bent piece and the second lower beam bent piece are assembled mainly with the straight beam and the upper beam to form a car frame for dragging the car. The wheel beam and the second lower beam bent piece are arranged side by side, and the car bottom wheel is installed between the second lower beam bent piece and the wheel beam and hidden therein. After the wire rope is wound around the car bottom wheel, the force on the car bottom wheel will be evenly distributed at both ends of the shaft. The car bottom wheel bearing is only subjected to radial force but not axial force, which effectively solves the problem of bearing life. At the same time, the car bottom wheel is hidden in the middle of the wheel beam of the second lower beam bent piece, which can release the pit space size and save space, which is more friendly to the pit height requirements in the national standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a general assembly drawing of a machine room-less elevator car frame of the utility model;

[0015] Figure 2 The utility model is an assembly diagram of a beam under a machine room-less elevator car frame. DETAILED DESCRIPTION

[0016] In order to better understand the technical solution of the utility model, the following is a detailed description through specific embodiments:

[0017] See also Figure 1The utility model discloses a machine room-less elevator car frame, comprising a car frame and a car bottom 4. The car frame comprises an upper beam 1, a straight beam 2, a lower beam 3, a guide shoe 6 and an oil cup 7. The two ends of the upper beam 1 are fastened to the straight beams 2 on both sides by bolts, and the guide shoes 6 and the oil cup 7 are respectively installed on the two ends of the upper beam 1, and the straight beam 2 is connected to the side of the car bottom 4. Please refer to Figure 2 The lower beam is composed of three beams arranged side by side, namely, the first lower beam bend 301, the second lower beam bend 302 and the wheel beam 303, which are connected to each other through a connecting piece. The car bottom wheel 304 is installed between the second lower beam bend and the wheel beam, and the wheel axle frame of the car bottom wheel 304 is arranged on the inner side of the second lower beam bend 302 and the wheel beam 303, so that the end surface projection range of the car bottom wheel 304 is partially covered by the second lower beam bend 302 and the wheel beam 303, and the bottom of the car bottom wheel 304 extends downward from the second lower beam bend 302 and the wheel beam 303 and is hidden therein. The two ends of the lower beam 3 are respectively fastened to the straight beams 2 on both sides by bolts, and guide shoes 6 are installed at the two ends of the lower beam. The first lower beam bend 301, the second lower beam bend 302 and the wheel beam 303 are respectively fastened to the middle part of the bottom surface of the car bottom 4 by bolts.

[0018] The car frame also includes an inclined tie rod group 5. The inclined tie rod group 5 is symmetrically arranged on the straight beams 2 on both sides. The inclined tie rod group 5 consists of two inclined tie rods, one end of which is bolted to the straight beam, and the other end is bolted to the side end of the car bottom. The two inclined tie rods of the inclined tie rod group 5 and the connecting part of the straight beam are arranged up and down. When the load of the car bottom 4 is unevenly distributed, the inclined tie rod group 5 can hold the two ends of the car bottom 4 to prevent the car bottom 4 from being cantilevered and stressed.

[0019] In this embodiment, safety clamps 305 are provided at both ends of the lower beam to prevent the car frame from overspeeding and provide safety protection.

[0020] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A machine room-less elevator car frame, comprising a car frame and a car bottom, characterized in that: The car frame includes an upper beam, a straight beam, a lower beam, a guide shoe and an oil cup; the two ends of the upper beam are fastened to the straight beams on both sides with bolts, and the guide shoes and the oil cup are installed on the upper ends respectively, and the straight beam is connected to the side of the car bottom; the lower beam is composed of a first lower beam bent part, a second lower beam bent part and a wheel beam arranged side by side, and the three are connected to each other, and the car bottom wheel is installed between the second lower beam bent part and the wheel beam, and the two ends of the lower beam are fastened to the straight beams on both sides with bolts respectively, and the two ends of the lower beam are installed with guide shoes, and the first lower beam bent part, the second lower beam bent part and the wheel beam are fastened to the middle part of the bottom surface of the car bottom by bolts respectively.

2. The machine room-less elevator car frame according to claim 1, characterized in that: The wheel axle frame of the car bottom wheel is arranged on the inner side surface of the second lower beam bent piece and the wheel beam, so that the end surface projection range of the car bottom wheel is partially covered by the second lower beam bent piece and the wheel beam, and the bottom of the car bottom wheel extends downward from the second lower beam bent piece and the wheel beam.

3. The machine room-less elevator car frame according to claim 1, characterized in that: The car frame also includes an inclined rod group, which is symmetrically arranged on the straight beams on both sides. The inclined rod group consists of two inclined rods, one end of which is bolted to the straight beam, and the other end is bolted to the side end of the car bottom.

4. The machine room-less elevator car frame according to claim 3, characterized in that: The connection parts of the two diagonal braces of the diagonal brace group and the straight beam are arranged up and down.

5. The machine room-less elevator car frame according to claim 1, characterized in that: Safety clamps are provided at both ends of the lower beam.

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