CN214652832U

CN214652832U - Elevator safety tongs

Info

Publication number: CN214652832U
Application number: CN202023035653.3U
Authority: CN
Inventors: 邹家春; 戴永强; 姚荣康; 陈明星
Original assignee: Hangzhou Huning Elevator Parts Co Ltd
Current assignee: Hangzhou Huning Elevator Parts Co Ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-11-09
Anticipated expiration: 2030-12-16

Abstract

The utility model belongs to the technical field of elevator safety component manufacturing, in particular to an elevator safety tongs, which comprises a mounting seat, a U-shaped spring, a lifting rod, a fixed wedge block and a sliding wedge block; the U-shaped spring is arranged on the mounting seat, the two fixed wedge blocks are respectively arranged on the two inner sides of the U-shaped spring, the two sliding wedge blocks are positioned between the two fixed wedge blocks and are respectively connected with the two fixed wedge blocks in a sliding manner, the two sliding wedge blocks are both connected with the lifting rod, the top of each fixed wedge block is provided with a groove, and a rotatable movable body is arranged in each groove; the top of mount pad is equipped with the logical groove that runs through, and the direction that leads to the groove is unanimous with the horizontal deformation direction of U-shaped spring, leads to groove and movable body one-to-one, and the movable body is located the recess and leads to between the groove. The utility model discloses a movable body in the recess of fixed voussoir top mutually supports with the logical groove at mount pad top, can effectively eliminate the unbalanced force between fixed voussoir and the mount pad top among the braking process, ensures the stability of safety tongs in braking process.

Description

Elevator safety tongs

Technical Field

The utility model belongs to the technical field of the elevator safety part is made, concretely relates to elevator safety tongs.

Background

An elevator safety tong is a safety device which holds a car in a stationary state by being suddenly stopped on a guide rail when the running speed of an elevator exceeds a limit speed set by an elevator governor or when a suspension rope is broken or slackened by operation of the elevator governor. The existing elevator safety tongs mainly comprise a mounting seat, a pull rod and a braking mechanism, wherein the mounting seat is fixedly connected with a car, the braking mechanism comprises a U-shaped spring, two fixed wedge blocks, two sliding wedge blocks and the like, and the pull rod is connected to the two sliding wedge blocks. The work is as follows: during normal work, the safety tongs move along with the elevator car, when the elevator car is accelerated unexpectedly, and when the action condition of the speed limiter is reached, the speed limiter is upwards moved through the speed limiter linkage mechanism, the two sliding wedge blocks are pulled to move upwards, and under the guidance of a wedge surface between the sliding wedge blocks and the fixed wedge blocks, the two sliding wedge blocks move oppositely and are clamped on an elevator guide rail, so that emergency braking is realized.

In the prior art, a fixed wedge block of the elevator safety gear is matched with a limit groove arranged on an upper top plate of a mounting seat for use. In the braking process, the fixed wedge block moves along the tension direction of the U-shaped spring, when the sliding wedge block is lifted upwards for braking, the fixed wedge block is influenced by the acting force of the spring, the movement between the fixed wedge block and the top plate on the mounting seat is blocked and cannot be effectively released, so that the fixed wedge block loses balance in the horizontal direction, and the U-shaped spring, the fixed wedge block and the sliding wedge block cannot be attached together. In addition, due to the influence of the installation sizes of the fixed wedge block and the sliding wedge block, the contact area of the guide rail cannot be effectively increased, and therefore the stability of the safety gear in the braking process is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem, providing an elevator safety gear.

In order to realize the technical purpose, the utility model adopts the following technical scheme:

an elevator safety gear comprises a mounting seat, a U-shaped spring, a lifting rod, a fixed wedge block and a sliding wedge block; the U-shaped spring is arranged on the mounting seat, the two fixed wedge blocks are respectively arranged on the two inner sides of the U-shaped spring, the two sliding wedge blocks are positioned between the two fixed wedge blocks and are respectively in sliding connection with the two fixed wedge blocks, the two sliding wedge blocks are both connected with the lifting rod, the elevator guide rail penetrates through the U-shaped spring and is positioned between the two sliding wedge blocks, a groove is formed in the top of each fixed wedge block, and a rotatable movable body is arranged in the groove; the top of mount pad is equipped with the logical groove that runs through, and the direction that leads to the groove is unanimous with the horizontal deformation direction of U-shaped spring, leads to groove and movable body one-to-one, and the movable body is located the recess and leads to between the groove.

Further, the top of the mounting seat comprises an upper top plate and a base plate; the top surface of the base plate is attached to the bottom surface of the upper top plate, and the bottom surface of the base plate is opposite to the top of the fixed wedge block; the through groove is arranged on the bottom surface of the substrate.

Further, a lower bottom plate is arranged at the bottom of the mounting seat; the upper top plate, the base plate and the lower bottom plate are all arranged in guide rail sliding grooves for the elevator guide rails to penetrate through.

Furthermore, the mounting seat further comprises two side plates, the U-shaped spring is located between the two side plates, and two sides of the U-shaped spring are connected with the two side plates respectively.

Furthermore, the surface of the fixed wedge block is provided with two fixed wedge block slide rails, and the sliding wedge block is arranged in a sliding groove formed by the two fixed wedge block slide rails in a sliding manner.

Furthermore, a ball slide bar is arranged between the two fixed wedge slide rails and is positioned between the fixed wedge and the sliding wedge.

Furthermore, the opposite surface of the sliding wedge block and the corresponding fixed wedge block is provided with a bulge, the bulge is connected with the sliding plate, the bulge and the sliding plate are both positioned in the sliding groove, and the sliding plate moves along the ball sliding row.

Furthermore, one surface of the sliding wedge block, which is far away from the corresponding fixed wedge block, is a friction surface parallel to the elevator guide rail, and the elevator guide rail is clamped by the friction surfaces of the two sliding wedge blocks.

Furthermore, the top end of the lifting rod penetrates through the base plate and the upper top plate, and the bottom of the lifting rod is connected with the fixed block; the two sliding wedge blocks are connected with the fixed block.

Furthermore, the grooves and the through grooves are both arc-shaped, and the movable body is spherical.

Compared with the prior art, the utility model has the beneficial technical effects that:

the utility model discloses a movable body in the recess of fixed voussoir top mutually supports with the logical groove at mount pad top, can effectively eliminate the unbalanced force between fixed voussoir and the mount pad top among the braking process, ensures the stability of safety tongs in braking process.

Drawings

Fig. 1 is an overall structure diagram of an elevator safety gear of the embodiment;

fig. 2 is a front structure view of an elevator safety gear of the embodiment;

fig. 3 is a schematic view of a relative structure between the movable body and the through groove in the present embodiment;

FIG. 4 is a schematic diagram of a groove structure according to the present embodiment;

fig. 5 is a schematic structural view of the sliding wedge of the present embodiment.

In the figure, 1 mounting seat, 11 upper top plate, 12 base plate, 13 lower bottom plate, 14 side plate, 15 partition plate, 16 through groove, 2U-shaped spring, 3 fixed wedge, 31 groove, 4 sliding wedge, 41 protrusion, 42 sliding plate, 43 friction surface, 5 movable body, 6 guide rail sliding groove, 7 fixed wedge sliding rail, 8 ball sliding row, 9 fixed block and 10 lifting rod.

Detailed Description

The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.

As shown in fig. 1-5, the elevator safety gear of the present embodiment includes a mounting base 1, a U-shaped spring 2, a lifting rod 10, a fixed wedge 3, and a sliding wedge 4. The U-shaped spring 2 is arranged on the mounting seat 1, the two fixed wedge blocks 3 are respectively arranged on two inner sides of the U-shaped spring 2 and are respectively fixedly connected with two inner sides of the U-shaped spring 2, the two sliding wedge blocks 4 are positioned between the two fixed wedge blocks 3 and are respectively in sliding connection with the two fixed wedge blocks 3, the two sliding wedge blocks 4 are both connected with the lifting rod 10, and the elevator guide rail penetrates through the U-shaped spring 2 and is positioned between the two sliding wedge blocks 4. The top of the fixed wedge 3 is provided with a groove 31, and a rotatable movable body 5 is arranged in the groove 31. The top of mount pad 1 is equipped with the logical groove 16 that runs through, and U-shaped spring 2 level is inside or the outside deformation of level, and the direction that leads to groove 16 is unanimous with U-shaped spring 2's horizontal deformation direction, leads to groove 16 and movable body 5 one-to-one, and movable body 5 is located between recess 31 and the logical groove 16.

When the elevator car is in a normal running state, the sliding wedge blocks 4 are positioned at the lowest part under the action of self weight, and the clamping surfaces of the two sliding wedge blocks 4 keep a certain distance with the elevator guide rail. When the elevator breaks down, the lift car quickly drops or moves upwards, when the abnormal operation speed reaches the action speed of the speed limiter, the speed limiter is triggered to act randomly, the speed limiter lifts the sliding wedge blocks 4 upwards through the lifting rod 10, the two sliding wedge blocks 4 continuously move upwards, and the distance between the two clamping surfaces is gradually reduced until the two clamping surfaces are attached to the guide rail of the elevator; meanwhile, the U-shaped spring 2 is expanded by the upward holding force, and the two sliding wedges 4 are firmly clamped on the elevator guide rail under the action of the U-shaped spring 2. During braking, the frictional resistance between the sliding wedge 4 and the top of the mounting 1 is transformed into the frictional resistance between the movable body 5 and the through slot 16. The movable body 5 can rotate freely and move along the through groove 16, so that unbalanced force between the fixed wedge block 3 and the top of the mounting seat 1 is effectively eliminated, the fixed wedge block 3 is always kept balanced in the horizontal direction, and the stability of the safety gear in the braking process is further ensured.

To facilitate the arrangement of the through slot 16, the top of the mounting base 1 includes an upper top plate 11 and a base plate 12. The top surface of the base plate 12 is fixedly connected with the bottom surface of the upper top plate 11 in a bonding manner, and the bottom surface of the base plate 12 is opposite to the top part of the fixed wedge 3. The through-groove 16 is disposed on the bottom surface of the substrate 12. The movable body 5 is located between the recess 31 at the top of the stationary wedge 3 and the through slot 16 at the bottom of the base plate 12. The bottom of the mounting seat 1 is provided with a lower bottom plate 13. The upper top plate 11, the base plate 12 and the lower bottom plate 13 are all arranged on the guide rail sliding groove 6 for the elevator guide rail to pass through. The guide rail sliding grooves 6 of the upper top plate 11, the base plate 12 and the lower bottom plate 13 are all located on the same vertical plane. The mounting seat 1 further comprises two side plates 14, the U-shaped spring 2 is located between the two side plates 14, and two sides of the U-shaped spring 2 are respectively connected with the two side plates 14. The left bolt and nut assembly penetrates through a hole in the left side plate 14, a left hole of the U-shaped spring 2 and a hole in the left fixed wedge 3 to connect the left side plate 14, the left hole of the U-shaped spring 2 and the left fixed wedge 3 into a whole. The right bolt and nut assembly passes through a hole on the right side plate 14, a right hole of the U-shaped spring 2 and a hole on the right fixed wedge 3, and the right side plate 14, the left hole of the U-shaped spring 2 and the right fixed wedge 3 are connected into a whole. The surface of the fixed wedge block 3 is provided with two fixed wedge block slide rails 7, and the sliding wedge block 4 is arranged in a sliding groove formed by the two fixed wedge block slide rails 7 in a sliding way. The left wedge bolt and nut component connects the two left fixed wedge slide rails 7 and the left fixed wedge 3 into a whole. The right wedge bolt and nut assembly connects the two right fixed wedge slide rails 7 with the right fixed wedge 3 into a whole. A ball slide bar 8 is arranged between the two fixed wedge slide rails 7, and the ball slide bar 8 is positioned between the fixed wedge 3 and the sliding wedge 4. The moving friction between the fixed wedge 3 and the sliding wedge 4 is changed to rolling friction. The side plate 14 of the mounting base 1 is also provided with a partition plate 15 parallel to the upper top plate 11 and the lower bottom plate 13, one side of the fixed wedge slide rail 7 opposite to the partition plate 15 is provided with a groove 31, one end of the partition plate 15 far away from the side plate 14 is positioned in the groove 31, and the sliding wedge 4 is positioned above the partition plate 15.

In order to be matched with a sliding groove formed by the two fixed wedge sliding rails 7 and the ball sliding row 8, a protrusion 41 is arranged on one surface of the sliding wedge 4 opposite to the corresponding fixed wedge 3, the protrusion 41 is connected with a sliding plate 42, the protrusion 41 and the sliding plate 42 are both positioned in the sliding groove, and the sliding plate 42 moves along the ball sliding row 8. The sliding wedge 4 is provided with a friction surface 43 parallel to the elevator guide rail at a surface far away from the corresponding fixed wedge 3, and the friction surfaces 43 of the two sliding wedges 4 are opposite and spaced apart from each other to penetrate through the car guide rail. The friction surfaces 43 are simultaneously clamping surfaces, and the elevator guide rails are clamped by the friction surfaces 43 of the two sliding wedges 4.

The top end of the lifting rod 10 penetrates through the base plate 12 and the upper top plate 11, and the bottom of the lifting rod 10 is connected with the fixing block 9. The two sliding wedges 4 are both connected with a fixed block 9. The grooves 31 and the through grooves 16 are both arc-shaped, and the movable body 5 is spherical.

The embodiments of the present invention have been described in detail, and those skilled in the art can easily understand that there are various changes in the embodiments according to the idea of the present invention, and such changes should be considered as the protection scope of the present invention.

Claims

1. An elevator safety gear comprises a mounting seat, a U-shaped spring, a lifting rod, a fixed wedge block and a sliding wedge block; u-shaped spring sets up in the mount pad, and two fixed voussoirs set up respectively in two inboards of U-shaped spring, and two slip voussoirs are located between two fixed voussoirs and respectively with two fixed voussoirs sliding connection, two slip voussoirs all are connected with the drag link, and the elevator guide rail runs through U-shaped spring and lies in between two slip voussoirs, its characterized in that: the top of the fixed wedge block is provided with a groove, and a rotatable movable body is arranged in the groove; the top of mount pad is equipped with the logical groove that runs through, and the direction that leads to the groove is unanimous with the horizontal deformation direction of U-shaped spring, leads to groove and movable body one-to-one, and the movable body is located the recess and leads to between the groove.

2. An elevator safety gear according to claim 1, characterized in that: the top of the mounting seat comprises an upper top plate and a base plate; the top surface of the base plate is attached to the bottom surface of the upper top plate, and the bottom surface of the base plate is opposite to the top of the fixed wedge block; the through groove is arranged on the bottom surface of the substrate.

3. An elevator safety gear according to claim 2, characterized in that: the bottom of the mounting seat is provided with a lower bottom plate; the upper top plate, the base plate and the lower bottom plate are all arranged in guide rail sliding grooves for the elevator guide rails to penetrate through.

4. An elevator safety gear according to claim 1, characterized in that: the mounting seat further comprises two side plates, the U-shaped spring is located between the two side plates, and two sides of the U-shaped spring are connected with the two side plates respectively.

5. An elevator safety gear according to claim 1, characterized in that: the surface of the fixed wedge block is provided with two fixed wedge block slide rails, and the sliding wedge block is arranged in a sliding groove formed by the two fixed wedge block slide rails in a sliding way.

6. An elevator safety gear according to claim 5, characterized in that:

a ball slide bar is arranged between the two fixed wedge slide rails and is positioned between the fixed wedge and the sliding wedge.

7. An elevator safety gear according to claim 6, characterized in that: the opposite side of the sliding wedge block and the corresponding fixed wedge block is provided with a bulge, the bulge is connected with the sliding plate, the bulge and the sliding plate are both positioned in the sliding groove, and the sliding plate moves along the ball sliding row.

8. An elevator safety gear according to claim 7, characterized in that: one surface of the sliding wedge block, which is far away from the corresponding fixed wedge block, is a friction surface parallel to the elevator guide rail, and the elevator guide rail is clamped by the friction surfaces of the two sliding wedge blocks.

9. An elevator safety gear according to claim 1, characterized in that: the top end of the lifting rod penetrates through the base plate and the upper top plate, and the bottom of the lifting rod is connected with the fixed block; the two sliding wedge blocks are connected with the fixed block.

10. Elevator safety gear according to any of claims 1-9, characterized in that: the grooves and the through grooves are both arc-shaped, and the movable body is spherical.