WO2016201934A1

WO2016201934A1 - Elevator limit switch and hoistway switch assembly thereof

Info

Publication number: WO2016201934A1
Application number: PCT/CN2015/098069
Authority: WO
Inventors: 李申; 范小斌; 周林; 王薪林; 毛剑
Original assignee: 海安县申菱电器制造有限公司
Priority date: 2015-06-17
Filing date: 2015-12-21
Publication date: 2016-12-22
Also published as: CN104867717A

Abstract

The present invention provides an elevator limit switch and a hoistway switch assembly. The elevator limit switch comprises a casing, a fixed contact assembly fixedly disposed on the casing, a wiring base fixed at one external end of the casing, a movable lever fixed to the casing, a movable roller axle connected to one end of the movable lever and a movable roller connected to the other end of the movable lever. The movable roller is disposed at the movable roller axle. A movable shaft is fixedly provided with a fixed base. A torsion spring sleeved on the movable shaft is provided in the fixed base, and the fixed base is further provided with a movable contact assembly. The fixed contact assembly comprises a static contact piece, the movable contact assembly comprises two movable contact pieces, and the two movable contact pieces are symmetrically arranged on the same side of the static contact piece and located on the opposite surface of the surface of the casing having the static contact piece fixed thereto. A position control device is provided at one end of the movable lever on the casing. The present invention improves and simplifies connections between the contact assemblies and reduces the size of the elevator limit switch. In addition, the position control device is well designed to achieve a good limiting effect.

Description

Elevator travel switch and hoistway switch assembly

Technical field

The invention belongs to the technical field of elevators and hoistways, and relates to a travel switch for an elevator, in particular to a hoistway switch assembly.

Background technique

In the presence of a terminal switch in the ladder well, it is used to protect the car from rising and falling beyond the allowable horizontal range. The terminal well is equipped with a terminal switch. The hoistway limit switch in the elevator is mainly used for the control and signal prompting of the elevator car arrival position during the elevator operation, and sends the detected signal to the elevator operation controller, and the elevator operation controller is based on The signal provided by the limit control switch determines the running state of the car and performs speed control, thereby ensuring that the car is buffered before the running direction is changed when running to the bottom of the hoistway or reaching the top of the hoistway, so that the elevator car does not Danger of bottoming or topping due to excessive running speed. The existing elevator shaft switch adopts an external compression spring structure, and the compression spring is in a state of bending instability for a long time, which is prone to mechanical fatigue, vibration is easy to occur during the operation of the elevator, and the compression spring is easy to fall, so that the switch loses control and affects the elevator. The safety of the operation is also the use of a torsion spring structure, but the poor limit effect makes the torsion shaft generate a large torque and the switch fails, which affects the reliability of the elevator.

For example, Chinese Patent No. 201110154206.6 discloses an elevator apparatus having a limit switch (LS) (4) that acts when the elevator car (7) exceeds a prescribed distance from a normal stop position of the terminal floor; Limit switch (FLS) (5), the final limit switch operates when the elevator car exceeds a specified distance and exceeds a certain distance, and the oil pressure buffer with the plunger (2) and the cylinder (3) The oil pressure buffer is arranged to be in contact with the elevator car at a predetermined distance from the normal stop position of the elevator car, in which the LS and the FLS are used to determine whether the elevator apparatus can be automatically operated The controlled switches, LS and FLS are mounted on the oil pressure damper, and the bottom of the hoistway on the elevator car side is disposed within the range of the projection surface of the horizontal section of the elevator car. This technical solution discloses the automatic operation of the elevator. The arrangement and control of the limit switch and the final limit switch for control are associated with the oil pressure buffer, thereby improving the reliability and convenience of the elevator, but the structure of the device is complicated and the limit effect is poor. high cost.

Another example is the Chinese patent 200520069144.9, which discloses an elevator shaft switch, which comprises a casing, an outer terminal block, a twisting rod, a twisting wheel shaft, a twisting wheel, a twisting shaft, a static contact piece, a moving contact piece, and the above-mentioned twisting shaft set. In the housing, one end of the twisting rod is connected to the twisting shaft, and the other end is connected to the twisting wheel axle, and the twisting wheel is arranged On the twisting axle, the twisting shaft is placed on the torsion spring fixing seat, and the torsion spring fixing seat has a built-in torsion spring and is sleeved on the twisting shaft. The difference is that the twisting rod is arranged on the side of the housing. The limited position bolt, the technical solution thinks of using the limit bolt for the second limit, but the limit bolt structure is too simple, and the limit effect is still not ideal.

Summary of the invention

In order to overcome the problems in the prior art that the structure is complicated, the limit effect is not good, and the danger of the elevator is easily caused, the present invention provides a travel switch for an elevator and a hoistway terminal switch assembly thereof.

The technical solution provided by the present invention is: a travel switch for an elevator, comprising: a housing, a fixed contact assembly fixedly disposed on the housing, a terminal block fixed to an outer end of the housing, and a twisting rod fixed to the housing, a twisting wheel shaft connected to one end of the twisting rod, a twisting wheel connected to the other end of the twisting rod, the twisting wheel is disposed on the twisting wheel shaft, and the fixing shaft is fixedly disposed on the twisting shaft, the fixing seat A torsion spring is disposed on the twisting shaft, and the movable seat assembly is fixedly disposed on the fixing base. The innovative point is that the fixed contact assembly includes a static contact piece and a movable contact point. The assembly includes two movable contacts, the two movable contacts are symmetrically distributed on the same side of the static contact piece, and are located on opposite sides of the static contact piece fixed on the upper surface of the housing; the twisting rod on the housing is also disposed at one end There is a position control device, which comprises a vertically placed convex device and a positioning square block. The positioning square block is fixedly disposed at the bottom of the convex device, and the convex portion of the convex device is fixed to one end of the twisting rod. The twisting wheel is made of an elastic resin material and is made of an elastic resin material, which can improve the service life of the twisting wheel and reduce noise.

On the basis of the above, the convex device body is a convex block, the convex portion of the convex block is provided with a roller shaft, and the two sides are symmetrically arranged with a circular arc groove, which are respectively a first circular arc groove and a second a circular arc groove, wherein the first circular arc groove is provided with a positioning plate and the first circular groove shape matches the shape of the positioning plate, and the roller is fixedly connected with the positioning plate; There are positioning beads.

On the basis of the above, the positioning plate structure has an overall "L" shape, and the length of the bottom edge of the "L" type positioning plate is 1/2 to 1/3 of the width of the convex block.

On the basis of the above, the second circular arc groove is disposed as a U-shaped structure with different lengths on both sides, the opening of the U-shaped structure faces the bottom of the convex device and is not closed, and the positioning bead is disposed in the U-shaped structure. .

Based on this, the positioning beads have a diameter of 3 to 8 cm.

Based on this, the positioning beads have a diameter of 4 to 6 cm.

Another object of the present invention is to provide a hoistway terminal switch assembly including an elevator travel switch. The innovation is that it includes a plurality of elevator travel switches, guide rails and a cover; each of the elevator travel switches is fixedly connected to the guide rail, and the guide rail is fixed on the guide rail.

On the basis of the above, the hoistway terminal switch assembly further includes a switch fixing device fixed to both ends of the rail; the switch fixing device includes a clamping piece and a bracket, and the clamping piece is fixed on one side surface of the bracket, The bracket is fitted and fixed on the guide rail.

On the basis of the above, the clamping piece comprises a clamping piece main piece and a clamping piece secondary piece, and the clamping piece main piece and the clamping piece secondary piece have a "7" shape, and the clamping piece main piece and the clamping piece are The clamping piece is symmetrically fixed to one side surface of the bracket, and the fixed distance between the clamping piece main piece and the clamping piece secondary piece is set as the housing width of the elevator travel switch.

On the basis of the above, the "7"-shaped bent portion of the holding piece main piece and the holding piece secondary piece is set in an arc shape, and the 7"-shaped head is further provided with a curved hook, the hook angle It is 10 to 30 degrees.

Compared with the prior art, the beneficial effects of the present invention are as follows:

(1) The elevator travel switch of the present invention, the fixed contact assembly includes a static contact piece, and the movable contact assembly includes two movable contact pieces, and the two movable contact pieces are symmetrically distributed on the same side of the static contact piece, and are located at the same The static contact piece is fixed on the opposite surface of the upper surface of the casing; the connection relationship between the contact assemblies is improved and simplified, and the size of the travel switch for the elevator is reduced; the end of the twisting rod on the casing is provided with a position control device, and the position control device is provided The utility model comprises a vertical positioning convex device and a positioning square block, wherein the positioning square block is fixedly arranged on the bottom of the convex device, and the convex portion of the convex device is fixed at one end of the twisting rod, and the control device has an ingenious design overall, the convex device Cooperating with the positioning square block can achieve good limit effect and simple structure design.

(2) The travel switch for an elevator according to the present invention, the main body of the convex type device is a convex block, which is simple to manufacture, the convex portion of the convex block is provided with a roller shaft, and the two sides are symmetrically arranged with a circular arc groove, respectively being the first a circular arc groove and a second circular arc groove, wherein the first circular arc groove is provided with a positioning plate and the first circular groove shape matches the shape of the positioning plate, and the roller is fixedly connected with the positioning plate; the second circle The positioning groove is arranged in the arc groove, and the positioning plate is used in conjunction with the positioning bead. After the roller rotates at a certain angle, the movement of the positioning plate is restricted. After the positioning plate moves after a certain distance, the positioning of the bead is stopped. When the first circular arc groove and the second circular arc groove are at one end, the positioning bead stops rolling, the positioning plate stops rotating, the roller stops rotating, and the angle of the roller rotation reaches a predetermined value, thereby controlling the switch to the stroke The switch performs a second limit.

(3) In the elevator travel switch of the present invention, the positioning plate structure is an "L" type as a whole, and the length of the bottom side of the "L" type positioning plate is 1/2 to 1/3 of the width of the convex block, and the shape of the positioning plate With the determination of the length, you can be more Effectively guarantee the positional distance of the limit and the accuracy of the limit, and ensure the safety of the elevator.

(4) The elevator travel switch of the present invention, the second arc groove is provided as a U-shaped structure having different lengths on both sides, the opening of the U-shaped structure faces the bottom of the convex device and is not closed, and the positioning bead is disposed on the U-shaped Within the structure, the roller can be rotated by a certain angle to limit the movement of the positioning plate.

(5) The hoistway terminal switch assembly of the present invention comprising an elevator travel switch, comprising a plurality of elevator travel switches, guide rails and a cover, and further comprising a switch fixing device fixed at both ends of the guide rail; specifically, the switch The fixing device comprises a clamping piece and a bracket, the clamping piece is fixed on one side surface of the bracket, the bracket is fixedly mounted on the guide rail, the structure is simple, the installation speed is fast, and the adjustment is convenient, the clamping piece and the bracket are matched, and the clamping effect is good. Under the premise that it is not easy to damage the travel switch, the elastic clamping piece is selected, and the effect is remarkable.

(6) The hoistway terminal switch assembly of the present invention comprising a travel switch for an elevator, the holding piece comprises a main piece for holding the piece and a piece of the holding piece, and the shape of the main piece of the holding piece and the piece of the holding piece are "7" "Zigzag shape", the main piece of the clamping piece and the secondary piece of the clamping piece are symmetrically fixed on one side surface of the bracket, and after the tail portions of the clamping stroke switch are oppositely arranged by the "7" shaped heads of the two sides, the main piece and the clamping piece of the clamping piece are controlled. The fixed distance between the two pieces of the piece is set to the width of the casing of the elevator travel switch, the clamping effect is good, and the safety clearance of the travel switch is left.

(7) The hoistway terminal switch assembly including the travel switch for an elevator of the present invention, wherein the "7"-shaped bent portion of the main piece of the holding piece and the holding piece of the holding piece is set in an arc shape, and the head of the 7" shape It is also provided with a curved hook with a hook angle of 10 to 30°, which can more effectively reduce the friction between the switch and the switch, ensure the fixing effect, and improve the safety of the elevator operation.

DRAWINGS

1 is a schematic cross-sectional structural view of an elevator travel switch A-A of the present invention;

Figure 2 is a side view showing the structure of the travel switch for an elevator of the present invention;

3 is a schematic structural view of a hoistway terminal switch assembly of an elevator travel switch including an elevator travel switch according to the present invention;

4 is a schematic structural view of a switch fixing device of a hoistway terminal switch assembly of the present invention;

Figure 5 is a schematic structural view of a clamping piece of a hoistway terminal switch assembly of the present invention;

Fig. 6 is a schematic view showing another structure of the hoistway terminal switch assembly of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention relates to an elevator travel switch, as shown in FIG. 1 , comprising a housing 1 , a fixed contact assembly fixedly disposed on the housing 1 , a terminal block 10 fixed to an outer end of the housing 1 , and being fixed to the housing a twisting rod 4 on 1 , a twisting wheel shaft 2 connected to one end of the twisting rod 4 , a twisting wheel 3 connected to the other end of the twisting rod 4 , the twisting wheel 3 being placed on the twisting wheel shaft 2 The fixed shaft 8 is fixedly disposed on the moving shaft 7 , and the torsion spring 9 is disposed on the rotating shaft 7 and sleeved on the twisting shaft 7 . The fixed seat 8 is also fixedly provided with a movable contact assembly, and the fixed contact assembly includes a The static contact piece 5 includes two movable contact pieces 6 which are symmetrically distributed on the same side of the static contact piece 5 and located on the opposite side of the static contact piece 5 fixed to the upper surface of the housing 1. The end of the twisting rod 4 on the casing 1 is further provided with a position control device 11 as shown in FIG. 2: the position control device 11 includes a convex device 112 and a positioning square block 111 which are vertically disposed, and the positioning square block 111 is fixed. Provided at the bottom of the convex device 112, the convex portion of the convex device 112 is fixed to one end of the twisting rod 4; this embodiment improves and simplifies the contact group The connection relationship between the pieces reduces the size of the elevator travel switch; the end of the twisting rod on the housing is provided with a position control device, and the position control device comprises a vertical positioning convex device and a positioning square block, and the positioning square block is fixed It is disposed at the bottom of the convex device, and the convex portion of the convex device is fixed at one end of the twisting rod. The overall design of the position control device is ingenious, and the cooperation between the convex device and the positioning square block can achieve a good limit effect. The structure design is simple. The twisting wheel is made of an elastic resin material and is made of an elastic resin material, which can improve the service life of the twisting wheel and reduce noise.

Specifically, as shown in FIG. 2, the main body of the convex device 112 is a convex block, and the convex portion of the convex block is provided with a roller 1121, and the two sides are symmetrically arranged with circular arc grooves, respectively being the first circular arc concave a groove 1122 and a second circular arc groove 1123. The first circular arc groove 1122 is provided with a positioning plate 1124 and the shape of the first circular arc groove 1122 is matched with the shape of the positioning plate 1124. The roller 1121 is fixedly connected with the positioning plate 1124. A positioning bead 1125 is disposed in the second circular arc groove 1123. The invention adopts the cooperation of the positioning plate and the positioning bead, and after the roller rotates by a certain angle, the movement of the positioning plate is restricted, and after the positioning plate moves after a certain distance and stops, specifically, the positioning bead rolls to the first circular arc groove. When the end of the second circular arc groove is stopped, the positioning bead stops rolling, the positioning plate stops rotating, the roller stops rotating, and the angle at which the roller rotates reaches a predetermined value, so that the control switch can second limit the travel switch.

As shown in FIG. 2, the positioning plate 1124 has an overall "L" shape, and the length of the bottom side of the "L" type positioning plate is 1/2 to 1/3 of the width of the convex block. In the elevator travel switch of the present invention, the positioning plate structure is generally "L" type, and the length of the bottom side of the "L" type positioning plate is 1/2 to 1/3 of the width of the convex block, and the shape and length of the positioning plate are Determined, it can more effectively guarantee the position distance of the limit and the accuracy of the limit, and efficiently guarantee the elevator. Driving safety.

As shown in FIG. 2, the second circular arc groove 1123 is disposed as a U-shaped structure having different lengths on both sides, the opening of the U-shaped structure is facing the bottom of the convex device and is not closed, and the positioning bead 1125 is disposed in the U-shaped structure. The positioning bead 1125 of the present embodiment has a diameter of 3 to 8 cm, and preferably, the positioning bead has a diameter of 4 to 6 cm. The second circular arc groove is disposed as a U-shaped structure with different lengths on both sides. The opening of the U-shaped structure faces the bottom of the convex device and is not closed, and the positioning bead is disposed in the U-shaped structure, so that the roller can be rotated by a certain angle. Thereby limiting the movement of the positioning plate.

The above-mentioned hoistway terminal switch assembly including the elevator travel switch, as shown in FIG. 3, includes a plurality of elevator travel switches, guide rails 12 and a cover 13 as described above; each elevator travel switch is fixedly connected to the guide rail 12 The cover 13 is fixed to the guide rail 12.

As shown in FIG. 3, the hoistway terminal switch assembly further includes a switch fixing device 14 fixed to both ends of the guide rail 12; specifically, as shown in FIG. 4, the switch fixing device 14 includes a clamping piece and a bracket 141. The clamping piece is fixed to one surface of the bracket 141, and the bracket 141 is fitted and fixed to the guide rail 12.

As shown in FIG. 5, the holding piece includes a holding piece main piece 142 and a holding piece secondary piece 143, and the clamping piece main piece 142 and the holding piece secondary piece 143 have a shape of a "7" shape, and the holding piece The main piece 142 and the holding piece 143 are symmetrically fixed to one surface of the bracket 141, and the holding piece main piece 142 and the holding piece 143 are fixed at a fixed distance to the housing width of the elevator travel switch. As shown in FIG. 4, as a further optimization of the present embodiment, as shown in FIG. 6, the "7"-shaped bent portion of the holding piece main piece 142 and the holding piece secondary piece 143 is set in an arc shape, and 7" The head of the glyph is also provided with a curved hook with a hook angle of 10 to 30. In particular, the clamping piece selects an elastic material. The switch fixing device of the hoistway terminal switch assembly of the present invention has a simple structure and a fast mounting speed. And the adjustment is convenient, the clamping piece and the bracket cooperate, the clamping effect is good, and the change of the stroke switch is not easy to damage, the elastic clamping piece is selected, the effect is remarkable. The clamping piece comprises the clamping piece main piece and the clamping piece secondary piece The shape of the main piece of the holding piece and the piece of the holding piece are both "7"-shaped, and the main piece of the holding piece and the piece of the holding piece are symmetrically fixed on one side surface of the bracket, and the "7" shaped head is used by both After the clamping stroke switch tail portion is oppositely disposed, the fixed distance between the control clamping piece main piece and the clamping piece secondary piece is set as the housing width of the elevator travel switch, the clamping effect is good, and the safety clearance of the travel switch is left. Design the "7"-shaped bend of the main piece of the holding piece and the piece of the holding piece The folding portion is arranged in an arc shape, and the head of the 7" shape is also provided with a curved hook, and the angle of the hook is 10 to 30°, which can more effectively reduce the friction between the switch and the switch, ensure the fixing effect, and improve the elevator operation. safety.

The above description shows and describes a preferred embodiment of the present invention. As described above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be construed as being Combinations, modifications, and environments are possible, and can be modified by the teachings of the above teachings or related art within the scope of the inventive concept described herein. All changes and modifications made by those skilled in the art are intended to be within the scope of the appended claims.

Claims

An elevator travel switch includes a housing (1), a fixed contact assembly fixedly disposed on the housing (1), a terminal block (10) fixed to an outer end of the housing (1), and fixed to the housing ( 1) a twisting rod (4) on the upper side, a twisting wheel shaft (2) connected to one end of the twisting rod (4), a twisting wheel (3) connected to the other end of the twisting rod (4), the twisting wheel (3) placed on the twisting axle (2), the twisting shaft (7) is fixedly provided with a fixing seat (8), and the fixing seat (8) is provided with a torsion spring (9) and sleeved on The rotating shaft (7) is further provided with a movable contact assembly on the fixing base (8), wherein the fixed contact assembly comprises a static contact piece (5), and the movable contact assembly The two movable contacts (6) are symmetrically distributed on the same side of the static contact piece (5), and the static contact piece (5) is fixed on the upper surface of the housing (1). Opposite side; the end of the twisting rod (4) on the casing (1) is further provided with a position control device (11), and the position control device (11) comprises a convex device (112) placed vertically and a square block positioned ( 111), the positioning square block (111) is fixedly disposed at the bottom of the convex device (112), and the convex portion of the convex device (112) The minute part is fixed to one end of the twisting rod (4); the twisting wheel (3) is made of an elastic resin material.
The travel switch for an elevator according to claim 1, wherein the main body of the convex device (112) is a convex block, and the convex portion of the convex block is provided with a roller (1121), and the two sides are symmetrically arranged. The circular arc groove is respectively a first circular arc groove (1122) and a second circular circular groove (1123), wherein the first circular circular groove (1122) is provided with a positioning plate (1124) and the first circle The shape of the arc groove (1122) matches the shape of the positioning plate (1124), and the roller (1121) is fixedly connected with the positioning plate (1124); the positioning hole (1125) is disposed in the second circular groove (1123). .
The travel switch for an elevator according to claim 2, wherein the positioning plate (1124) is integrally formed in an "L" shape, and the bottom length of the "L" type positioning plate (1124) is a convex block. 1/2 to 1/3 of the width.
The travel switch for an elevator according to claim 2, wherein the second circular arc groove (1123) is provided as a U-shaped structure having different lengths on both sides, and the opening of the U-shaped structure faces the bottom of the convex device. And not closed, the positioning bead (1125) is disposed within the U-shaped structure.
The travel switch for an elevator according to claim 2 or 4, wherein the positioning bead (1125) has a diameter of 3 to 8 cm.
The travel switch for an elevator according to claim 2 or 4, wherein the positioning bead (1125) has a diameter of 4 to 6 cm.
A hoistway terminal switch assembly including the elevator travel switch according to claim 1, comprising: a plurality of elevator travel switches, a guide rail (12) and a cover (13); each of the elevator travel switches It is fixedly attached to the guide rail (12), and the cover (12) is fixed on the guide rail (12).
A hoistway terminal switch assembly including an elevator travel switch according to claim 7, wherein said hoistway terminal switch assembly further comprises a switch fixing device (14), said switch fixing device (14) being fixed to the guide rail (12) The switch fixing device (14) comprises a clamping piece and a bracket (141) fixed to one side surface of the bracket (141), and the bracket (141) is fitted and fixed on the rail (12).
A hoistway terminal switch assembly including an elevator travel switch according to claim 8, wherein said holding piece comprises a holding piece main piece (142) and a holding piece secondary piece (143), and the holding piece main The shape of the piece (142) and the clamping piece (143) are both "7"-shaped, and the clamping piece main piece (142) and the clamping piece secondary piece (143) are symmetrically fixed on one side surface of the bracket (141). And the fixed distance between the clamping piece main piece (142) and the clamping piece secondary piece (143) is set as the housing width of the elevator travel switch.
A hoistway terminal switch assembly including an elevator travel switch according to claim 9, wherein said holding piece main piece (142) and said "7"-shaped bent portion of said holding piece (143) It is set in an arc shape, and the head of the 7" shape is also provided with a curved hook with a hook angle of 10 to 30 degrees.