A traction elevator

Abstract

A traction elevator comprises: a hoistway, an elevator lifting assembly, a counterweight lifting assembly, and a power assembly; the present invention uses only two steel sections as the load-bearing beams of the elevator, thereby reducing the number of reserved bearing platforms, reducing the construction difficulty, and saving costs; at the same time, a bracket partition is arranged between the counterweight and the car to provide support for the car guide device; the counterweight wheels arranged side by side and staggered on the counterweight and the rotatable counterweight guide wheels arranged on the load-bearing beam allow the steel wire rope to be freely subjected to vertical force, and the counterweight wheels are located between the horizontal projections of the two load-bearing beams, thereby ensuring that the force on the steel wire rope is uniform, avoiding the influence of the slight twisting of the counterweight on the steel wire rope, and ensuring the reliable and long-term operation of the elevator.

Description

Technical Field

[0001] The present invention relates to the field of elevators, and in particular to a traction elevator. Technical Background

[0002] An elevator is a vertical lift powered by an electric motor and equipped with a cabin-shaped pod, used to carry people or goods in multi-story buildings. A vertical lift has a car that runs between at least two vertical rigid rails. The size and structure of the car are convenient for passengers to enter and exit or load and unload goods. The emergence of elevators not only makes it easier for people to go up and down stairs, but also greatly promotes the development of real estate towards super-high-rise buildings.

[0003] The Chinese patent application number CN201721884399.X discloses a traction structure of a machine room traction car elevator, comprising: a load-bearing beam composed of two symmetrically arranged I-beams arranged horizontally above the machine room floor, and a counterweight beam composed of channel steels arranged horizontally above the machine room floor and perpendicular to the load-bearing beam; a traction machine with a traction ratio of 4:1 and a traction wheel driven by the traction machine are fixedly arranged on the load-bearing beam; two car top guide wheels, a rope clamp and a car top rope plate are also arranged on the load-bearing beam; a counterweight guide wheel and a counterweight rope plate are arranged on the counterweight beam; one end of the traction rope is connected to the car top rope plate through a car top rope head, and the other end is connected to the counterweight rope plate through a counterweight rope head; the traction rope starts from the car top rope plate and passes through the car top wheel, two car top guide wheels, the car top wheel, the traction wheel, the counterweight wheel, the counterweight guide wheel and the counterweight wheel in sequence and ends at the counterweight rope plate. This traction elevator uses a load-bearing beam composed of two symmetrically arranged I-beams horizontally arranged above the machine room floor, and a counterweight beam composed of channel steel horizontally arranged above the machine room floor and perpendicular to the load-bearing beam as beams that bear the counterweight and the car. This structure requires welding at the intersection of the load-bearing beam and the counterweight beam, which is not stable enough and makes the operation of implementing this technical solution more complicated; when the counterweight moves too fast and passes through the car, it may swing toward the car, which will increase the force on the wire rope, which will bring some safety hazards. Summary of the invention

[0004] In order to solve the technical problems existing in the above-mentioned prior art, the present invention proposes a traction elevator.

[0005] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0006] A traction elevator comprises: a hoistway, which provides an installation position for an elevator lifting assembly, a counterweight lifting assembly and a power assembly; the elevator lifting assembly is installed in the hoistway and moves up and down under the action of the power assembly; the counterweight lifting assembly is installed in the hoistway and balances the gravity of the elevator lifting assembly through a steel wire rope; The power assembly is installed in the hoistway to provide lifting power for the elevator lifting assembly; the hoistway includes: an elevator hoistway, which provides space for the elevator box to move up and down; a counterweight hoistway provides space for the counterweight to move up and down; a load-bearing beam, which is composed of a first profile and a second profile arranged in parallel, is fixedly installed on the top of the elevator hoistway and the counterweight hoistway, and provides an installation position for the elevator lifting assembly, the counterweight lifting assembly and the power assembly; the power assembly includes: a traction machine, which is fixed on the load-bearing beam to provide kinetic energy for the movement of the elevator box; a traction wheel, which is fixed on the traction machine, and outputs the power output by the traction machine through a wire rope; the wire rope, at both ends of which are respectively fixed on the load-bearing beam, transmits the power to the traction pulley to rotate; the elevator lifting assembly includes: an elevator box, which is suspended in the elevator hoistway, and is used For carrying people or goods; the box top wheel is fixedly mounted on the top of the elevator box body and controls the movement direction of the elevator box body by rotation; the box body guide wheel is fixedly mounted on the load-bearing beam and changes the direction of the force on the wire rope by rotation; the counterweight lifting assembly comprises: a counterweight, suspended in the counterweight shaft, used to balance the weight of the elevator box body; a counterweight guide wheel, fixedly mounted on the load-bearing beam and changes the direction of the force on the wire rope by rotation; a counterweight wheel, fixed on the top of the counterweight, drives the counterweight to move up and down; it is characterized in that there is a bracket partition between the elevator shaft and the counterweight shaft; the counterweight guide wheel comprises: a pulley, movably matched with a cylindrical shaft fixed on the pulley frame; the pulley frame, movably matched with a bolt; the bolt is fixedly connected to the first profile through two nuts.

[0007] In the prior art, the elevator car and the counterweight are suspended in the shaft by a load-bearing beam composed of two symmetrically arranged I-beams horizontally arranged above the machine room floor, and a counterweight beam composed of channel steels horizontally arranged above the machine room floor and perpendicular to the load-bearing beam. In order to facilitate transportation and installation, the load-bearing beam and the counterweight beam of this vertical structure need to be welded. As a result, the connection here is very weak. The main stresses are the welding points and the places where the lower ends of the I-beams serving as the load-bearing beams are connected to the counterweight beams. Both stress-bearing points here are not strong enough, and danger may occur after long-term use. Moreover, when the counterweight moves too fast and meets the car, it may swing toward the car. It can be seen from a simple force analysis that this will increase the force on the wire rope, which will bring some safety hazards and may cause safety accidents over time.

[0008] In the above technical scheme, only two parallel profiles are used as load-bearing beams to carry the car and counterweight, which makes the beam structure simpler, and the required pedestals reserved for placing the load-bearing beams are also fewer, making installation more convenient. Preferably, the profile is an I-beam; a bracket partition is provided to separate the elevator shaft and the counterweight shaft. Preferably, the bracket partition includes two bracket partitions connected to the shaft wall and a third bracket partition located between the counterweight and the car, and the third bracket partition is provided with a guide rail and a braking device for controlling the movement of the counterweight, and the guide rail limits the trajectory of the movement of the counterweight; and the pulley frame of the counterweight guide wheel is mounted on the bolt and flexibly cooperates with it and can rotate around it. , so that when the counterweight has a slight twisting condition during starting or braking, the twisting of the counterweight can be converted into a slight twisting of the counterweight, the wire rope and the counterweight as a whole. The former will drive the wire rope to deviate from the vertical state, resulting in an increase in the tension on the rope, thereby posing a safety hazard, while the wire rope of the latter always maintains this vertical state, and the tension on the rope is always minimal; in order to facilitate the installation of the counterweight guide wheel, the pulley frame of the counterweight guide wheel is composed of two side plates connected by a cylindrical shaft and a connecting piece with a three-face structure of a cross-section of П, the two side surfaces of the connecting piece and the end of the side plate away from the cylindrical shaft have through holes, the connecting piece and the side plate are fixedly connected by screws, and the top of the connecting piece has a round hole that cooperates with the bolts.

[0009] Preferably, the bolt is fixed to the load-bearing beam via a nut, and a pin hole is provided at one end of the bolt away from the nut, and a pin is fixed in the pin hole.

[0010] Preferably, the counterweight lifting assembly comprises at least two counterweight wheels, and the two counterweight wheels are fixedly mounted on the top of the counterweight.

[0011] In the present technical solution, the two counterweight pulleys do not need to be arranged in parallel at intervals in the direction perpendicular to the load-bearing beam. Such an arrangement will make the installation length of the counterweight in the direction perpendicular to the load-bearing beam longer, so that the counterweight needs to be supported by the counterweight beam perpendicular to the load-bearing beam. The above-mentioned installation length refers to the vertical distance between the rope head of the wire rope on the counterweight beam and the plane where the traction wheel is located along the direction of the counterweight beam; the two counterweight pulleys can be arranged in an offset manner. Such an arrangement can shorten the installation length of the counterweight in the direction perpendicular to the load-bearing beam, so that the counterweight lifting assembly can be suitable for installation between the counterweight beams composed of two profiles. The installation length here refers to the horizontal straight-line distance between the installation position of the counterweight guide wheel on the load-bearing beam and the installation position of the rope head at that end.

[0012] Preferably, the two counterweight wheels are arranged in parallel and staggered manner on the counterweight, and the staggered distance between the two counterweight wheels on the horizontal plane is equal to the diameter length of the counterweight guide wheel.

[0013] In the present technical solution, the staggered distance refers to the distance between the projections of the two end points of the diameters of the two counterweight wheels on the same side of their respective rotating axes on the horizontal plane. Here, the horizontal distance is made equal to the above in order to ensure that the wire rope between the counterweight wheel and the counterweight guide wheel is in a vertical state, thereby ensuring that the tension on the wire rope is minimized.

[0014] Preferably, the counterweight guide wheel is fixed on a first profile, and one end of the steel wire rope led out from the counterweight wheel is fixed on a second profile.

[0015] Preferably, the elevator lifting assembly comprises at least two box top wheels and at least two box body guide wheels, the box top wheels are respectively fixed at both ends of the elevator box body along the direction of the load-bearing beam, and the two box body guide wheels are located between the two box top wheels in the horizontal direction.

[0016] Preferably, the distance between one end of the diameter of the traction wheel on the horizontal plane and one end of the diameter of the counterweight wheel on the horizontal plane in the horizontal direction is zero; the distance between the other end of the diameter of the traction wheel on the horizontal plane and one end of the diameter of the box top wheel close to the counterweight on the horizontal plane in the horizontal direction is zero.

[0017] Preferably, the distance between one end of the diameter of the box top wheel in the horizontal plane close to the counterweight and one end of the diameter of one box guide wheel in the horizontal plane far away from the counterweight in the horizontal direction is zero; the distance between one end of the diameter of the box top wheel in the horizontal plane far away from the counterweight and one end of the diameter of another box guide wheel in the horizontal plane is zero.

[0018] Preferably, the traction machine is selected from an asynchronous traction machine or a synchronous traction machine.

[0019] In summary, the beneficial effects of the present invention are:

[0020] 1. The present invention only needs two profiles as the load-bearing steel beams of the entire elevator device, and requires less reserved pedestals, no welding is required, the construction is convenient, and the cost is saved; the counterweights are arranged in a staggered manner, and no counterweight steel beams are required, thereby improving the utilization rate of the hoistway;

[0021] 2. The present invention uses a set of bracket partitions to separate the counterweight from the car, providing support for the car running guide mechanism, thereby ensuring the stable and long-term operation of the entire elevator device;

[0022] 3. The counterweight guide wheel of the present invention is rotatable, which makes it easy to install the counterweight lifting device between the two profiles. At the same time, the slight twisting of the counterweight will not affect the vertical state of the wire rope, ensuring that the tension in the wire rope is always the smallest, thereby increasing the life of the wire rope.

[0023] 4. The present invention adopts a 4:1 rope winding method, which reduces the load on the main shaft of the traction machine and improves its bearing life; at the same time, it also increases the upper limit of the carrying capacity of the elevator;

[0024] 5. The synchronous traction machine adopted in the present invention has higher energy efficiency and better energy-saving performance than the asynchronous traction machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the top view of the structure of a traction elevator provided in Example 1;

[0026] Figure 2 A side view connection diagram of a traction elevator provided in Example 2;

[0027] Figure 3 It is a cross-sectional view of the counterweight guide wheel;

[0028] In the figure, 1-hoistway, 2-elevator lifting assembly, 3-counterweight lifting assembly, 4-power assembly, 11-elevator hoistway, 12-counterweight hoistway, 13-load-bearing beam, 14-support partition, 21-elevator car, 22-car top wheel, 23-car guide wheel, 31-counterweight, 32-counterweight guide wheel, 33-counterweight wheel, 41-traction machine, 42-traction wheel, 43-wire rope, 131-first profile, 132-second profile, 321-pulley, 322-pulley frame, 323-bolt. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Example 1

[0031] 1. A traction elevator, comprising:

[0032] A hoistway 1 provides a mounting location for an elevator lifting assembly 2, a counterweight lifting assembly 3, and a power assembly 4;

[0033] The elevator lifting assembly 2 is installed in the hoistway 1 and moves up and down under the action of the power assembly 4;

[0034] A counterweight lifting assembly 3 is installed in the hoistway 1 and balances the gravity of the elevator lifting assembly 2 through a steel wire rope 43;

[0035] A power assembly 4 is installed in the hoistway 1 to provide lifting power for the elevator lifting assembly 2;

[0036] The hoistway 1 comprises:

[0037] The elevator shaft 11 provides space for the elevator box 21 to move up and down;

[0038] The counterweight shaft 12 provides space for the counterweight 31 to move up and down;

[0039] The load-bearing beam 13, which is composed of a first profile 131 and a second profile 132 arranged in parallel, is fixedly installed on the top of the elevator shaft 11 and the counterweight shaft 12, and provides an installation position for the elevator lifting assembly 2, the counterweight lifting assembly 3 and the power assembly 4;

[0040] The power assembly 4 comprises:

[0041] A traction machine 41, fixed on the load-bearing beam 13, provides kinetic energy for the movement of the elevator box 21;

[0042] The traction sheave 42 is fixed to the traction machine 41 and outputs the power output by the traction machine 41 through the wire rope 43;

[0043] The steel wire rope 43, both ends of which are fixed to the load-bearing beam 13, transmits power to the traction pulley to rotate;

[0044] The elevator lifting assembly 2 comprises:

[0045] The elevator box 21 is suspended in the elevator shaft 11 and is used to carry people or goods;

[0046] The box top wheel 22 is fixedly mounted on the top of the elevator box 1 and controls the movement direction of the elevator box 21 by rotating;

[0047] The box guide wheel 23 is fixedly mounted on the load-bearing beam 13 and changes the direction of the force on the wire rope 43 by rotating;

[0048] The counterweight lifting assembly 3 comprises:

[0049] A counterweight 31 is suspended in the counterweight shaft 12 and is used to balance the weight of the elevator car body 21;

[0050] The counterweight guide wheel 32 is fixedly mounted on the load-bearing beam 13 and changes the direction of the force on the wire rope 43 by rotating;

[0051] The counterweight wheel 33 is fixed on the top of the counterweight 31 to drive the counterweight 31 to move up and down;

[0052] It is characterized in that

[0053] There is a bracket partition 14 between the elevator shaft 11 and the counterweight shaft 12;

[0054] The counterweight guide wheel 32 comprises:

[0055] The pulley 321 is movably matched with a cylindrical shaft fixed on the pulley frame 322;

[0056] The pulley frame 322 is movably matched with the bolt 323;

[0057] The bolt 323 is fixedly connected to the first profile 131 via two nuts.

[0058] The bolt 233 is fixed to the load-bearing beam 13 via a nut. An insertion hole is provided at one end of the bolt 233 away from the nut, and a insertion pin is fixed in the insertion hole.

[0059] The counterweight lifting assembly 3 includes at least two counterweight wheels 33, and the two counterweight wheels 33 are fixedly installed on the top of the counterweight.

[0060] The two counterweight wheels 33 are arranged in parallel and staggered on the counterweight 31 , and the staggered distance between the two counterweight wheels 33 on the horizontal plane is equal to the diameter length of the counterweight guide wheel 32 .

[0061] The counterweight guide wheel 32 is fixed on the first profile 131 , and one end of the steel wire rope 43 led out from the counterweight wheel 33 is fixed on the second profile 132 .

[0062] The elevator lifting assembly 2 includes at least two box top wheels 22 and at least two box body guide wheels 23. The box top wheels 22 are respectively fixed at both ends of the elevator box body 21 along the direction of the load-bearing beam 13, and the two box body guide wheels 23 are located between the two box top wheels 22 in the horizontal direction.

[0063] The distance between one end of the diameter of the traction wheel 42 on the horizontal plane and one end of the diameter of the counterweight wheel 33 on the horizontal plane in the horizontal direction is zero; the distance between the other end of the diameter of the traction wheel 42 on the horizontal plane and one end of the diameter of the box top wheel 22 close to the counterweight 31 on the horizontal plane in the horizontal direction is zero.

[0064] The distance between the end of the diameter of the box top wheel 22 in the horizontal plane close to the counterweight 31 and the end of the diameter of one box guide wheel 23 in the horizontal plane in the horizontal direction is zero; the distance between the end of the diameter of the box top wheel 22 in the horizontal plane away from the counterweight 31 and the end of the diameter of the other box guide wheel 23 in the horizontal plane in the horizontal direction is zero.

[0065] The traction machine 41 is selected from an asynchronous traction machine or a synchronous traction machine.

Claims

1. A traction elevator, comprising: A hoistway (1) provides an installation location for an elevator lifting assembly (2), a counterweight lifting assembly (3) and a power assembly (4); An elevator lifting assembly (2) is installed in the hoistway (1) and moves up and down under the action of a power assembly (4); A counterweight lifting assembly (3) is installed in the hoistway (1) and balances the gravity of the elevator lifting assembly (2) via a steel wire rope (43); A power assembly (4) is installed in the hoistway (1) to provide lifting power for the elevator lifting assembly (2); The hoistway (1) comprises: An elevator shaft (11) provides space for the elevator box (21) to move up and down; The counterweight shaft (12) provides space for the counterweight (31) to move up and down; A load-bearing beam (13), composed of a first profile (131) and a second profile (132) arranged in parallel, is fixedly mounted on the top of the elevator shaft (11) and the counterweight shaft (12), and provides an installation position for the elevator lifting assembly (2), the counterweight lifting assembly (3) and the power assembly (4); The power assembly (4) comprises: A traction machine (41) is fixed on the load-bearing beam (13) and provides kinetic energy for the movement of the elevator car body (21); The traction wheel (42) is fixed to the traction machine (41) and outputs the power output by the traction machine (41) through the steel wire rope (43); The two ends of the steel wire rope (43) are respectively fixed on the load-bearing beam (13) to transmit power to the traction pulley to rotate; The elevator lifting assembly (2) comprises: An elevator box (21) is suspended in the elevator shaft (11) and is used to transport people or goods; A box top wheel (22) is fixedly mounted on the top of the elevator box (21) and controls the movement direction of the elevator box (21) by rotating; The box guide wheel (23) is fixedly mounted on the load-bearing beam (13) and changes the direction of the force on the steel wire rope (43) by rotating; The counterweight lifting assembly (3) comprises: A counterweight (31) is suspended in the counterweight shaft (12) and is used to balance the weight of the elevator car body (21); A counterweight guide wheel (32) is fixedly mounted on the load-bearing beam (13) and changes the direction of the force on the steel wire rope (43) by rotating; A counterweight wheel (33) is fixed on the top of the counterweight (31) to drive the counterweight (31) to move up and down; It is characterized in that There is a bracket partition (14) between the elevator shaft (11) and the counterweight shaft (12); The counterweight guide wheel (32) comprises: The pulley (321) is movably matched with a cylindrical shaft fixed on the pulley frame (322); The pulley frame (322) is movably matched with the bolt (323); A bolt (323) fixedly connected to the first profile (131) via two nuts; The two counterweight wheels (33) are arranged in parallel and staggered on the counterweight (31), and the staggered distance between the two counterweight wheels (33) on the horizontal plane is equal to the diameter length of the counterweight guide wheel (32); The elevator lifting assembly (2) comprises at least two box top wheels (22) and at least two box body guide wheels (23), wherein the box top wheels (22) are respectively fixed at two ends of the elevator box body (21) along the direction of the load-bearing beam (13), and the two box body guide wheels (23) are located between the two box top wheels (22) in the horizontal direction.

2. A traction elevator according to claim 1, characterized in that: The bolt (323) is fixed to the load-bearing beam (13) via a nut, and a latch hole is provided at one end of the bolt (323) away from the nut, and a latch is fixed in the latch hole.

3. A traction elevator according to claim 1, characterized in that: The counterweight lifting assembly (3) comprises at least two counterweight wheels (33), and the two counterweight wheels (33) are fixedly mounted on the top of the counterweight.

4. A traction elevator according to claim 1, characterized in that: The box guide wheel (23) is fixed on the first profile (131), and one end of the steel wire rope (43) led out from the counterweight wheel (33) is fixed on the second profile (132).

5. A traction elevator according to claim 1, characterized in that: The distance between one end of the diameter of the traction sheave (42) on the horizontal plane and one end of the diameter of the counterweight sheave (33) on the horizontal plane in the horizontal direction is zero; the distance between the other end of the diameter of the traction sheave (42) on the horizontal plane and one end of the diameter of the box top wheel (22) close to the counterweight (31) on the horizontal plane in the horizontal direction is zero.

6. A traction elevator according to claim 1, characterized in that: The distance in the horizontal direction between the end of the diameter of the box top wheel (22) on the horizontal plane close to the counterweight (31) and the end of the diameter of one box guide wheel (23) on the horizontal plane away from the counterweight (31) is zero; the distance in the horizontal direction between the end of the diameter of the box top wheel (22) on the horizontal plane away from the counterweight (31) and the end of the diameter of the other box guide wheel (23) on the horizontal plane is zero.

7. A traction elevator according to claim 1, characterized in that: The traction machine (41) is selected from an asynchronous traction machine or a synchronous traction machine.

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