CN202542617U

CN202542617U - Novel tensioning device for small pit

Info

Publication number: CN202542617U
Application number: CN 201220105667
Authority: CN
Inventors: 寇珊迪; 褚伋; 张继坤
Original assignee: XJ Elevator Co Ltd
Current assignee: XJ Schindler Xuchang Elevator Co Ltd; XJ Elevator Co Ltd
Priority date: 2012-03-20
Filing date: 2012-03-20
Publication date: 2012-11-21
Anticipated expiration: 2022-03-20

Abstract

A novel tensioning device for a small pit comprises a tensioning wheel, a bent board, two spring components and a base plate, wherein one end of an axle of the tensioning wheel is fixed in the middle of the bent board, the other end of the axle is fixedly provided with a wheel press plate, a safety switch is arranged at the back of the bent board and is on the same plumb line with the center of the axle, bent edges of the bent board are connected with the base plate through bolts which are symmetrically arranged at two sides of the tensioning wheel, the spring components are sheathed and penetrated and fixed on the bolts, and a gap is reserved between the tensioning wheel and the bent edges. According to the novel tensioning device, tensioning parts are arranged at two sides of the tensioning wheel, so that the height of whole tensioning wheel is slightly greater than the diameter of the tensioning wheel, and the structural size of the tensioning device is greatly reduced,.

Description

A kind of novel swelling device that is applicable to little pit

Technical field

This novel a kind of elevator car safety, speed-limit device that uses on particularly a kind of elevator of relating to.

Background technology

Velocity limiter is the safety device of elevator device, it at any time Monitoring and Controlling the speed of car.When the supervelocity situation occurring, promptly 115% of rated speed of lift o'clock, can in time send signal, produce mechanical action then and cut off feed circuit, make the towing machine braking.If elevator still can't be braked, the safety tongs action that then is installed in the car bottom is forced stop with car.

As shown in Figure 1, be the structural representation of prior art, this figure is generically and collectively referred to as speed limiter system, and shown in square frame A is interior is the velocity limiter part, and 2 ' is steel rope, and in the square frame shown in the B is the swelling device part, 3 ' bending plate is fixed in pit ground.

Swelling device is the part of speed limiter system.

Velocity limiter A is through steel rope 2 ' perception elevator speed, so steel rope must keep the tensioner state constantly, otherwise velocity limiter is with ineffective.

And swelling device B role is with steel rope 2 ' tension, makes steel rope keep the tensioner state constantly.

Along with expanding economy, space is more and more valuable, and various new-type buildings are also more and more harsher for the requirement of elevator hoistways size.

According to the GB requirement, except that energy disperser, the height of swelling device is the key factor of restriction pit least depth.Therefore, adopt highly lower swelling device, when elevator will be installed,, have wider Applicable scope to different pit depths.

And as shown in Figure 1 in the prior art, because bending plate 3 ' places the expansion tightening wheel lower end with spring 1 ', make whole swelling device scantling of structure big, limited the improved demand of pit depth, can not satisfy the elevator development need.

The utility model content

The purpose of the utility model is: design a kind of later-model swelling device structure, it is being satisfied under the prerequisite of safety rate, reduce height dimension and go for more shallow pit depth, and do not have the performance of reduction itself.

A kind of novel swelling device that is applicable to little pit comprises expansion tightening wheel, bending plate, two spring assemblies, base plate, and wheel shaft one end of expansion tightening wheel is fixed in the middle of the bending plate, and the wheel shaft other end is fixed with the wheel pressing plate; Safety switch places the bending plate back side and wheel shaft center on same plumb bob vertical; Bolt links to each other the bending edges of bending plate with base plate, bolt is symmetrically arranged in the expansion tightening wheel both sides, and spring assembly wears and be fixed on the bolt; Expansion tightening wheel and bending edge leave the gap.

Bending plate is a block plate, and a bending of broadside side is in the corresponding position perforate of wheel shaft and bolt.

Bolt is weldingly fixed on the base plate, and the nut on the bolt is a double nuts.

Employing the utility model structure makes whole expansion tightening wheel height tightly a little more than the expansion tightening wheel diameter because the tensioner parts are positioned at the expansion tightening wheel both sides, and the structure that greatly reduces swelling device is only very little, and this device design is simple and easy, cost is low, be easy to manufacturing, easy for installation; The installation comformability of elevator has obtained significantly improving, and can reduce the civil engineering size to the elevator installation influence.Original swelling device comprises the swelling device of the other types of domestic other elevator manufacturers, and all high than this improvement model by contrast, conservative estimate exceeds more than the 200mm at least.

It is more simple to improve back device manufacturing, and materials are economized, and bending plate only needs a bending, and the weld is few, only has the spring double-screw bolt to need spot welding.

Description of drawings

Fig. 1 prior art mounting structure scheme drawing;

Fig. 2 the utility model mounting structure scheme drawing;

Fig. 3 the utility model constructional drawing;

Fig. 4 is the birds-eye view of Fig. 3;

Fig. 5 is the left view of Fig. 3;

Fig. 6 is Fig. 3 back view;

Fig. 7 is the exploded drawings () of the utility model;

Fig. 8 is the exploded drawings (two) of the utility model.

The specific embodiment

Specify below in conjunction with figure:

A kind of novel swelling device that is applicable to little pit comprises expansion tightening wheel 2, bending plate 1, two spring assemblies 4, base plate 6, and wheel shaft 10 1 ends on the expansion tightening wheel 2 are fixed in the middle of the bending plate 1, and wheel shaft 10 other ends are fixed with wheel pressing plate 3; Safety switch 5 places bending plate 1 back side and wheel shaft 10 centers on same plumb bob vertical; Bolt 7 links to each other the bending edges 9 of bending plate 1 with base plate 6, bolt 7 is symmetrically arranged in expansion tightening wheel 2 both sides, and spring assembly 4 wears and is fixed on the bolt 7; Expansion tightening wheel 2 leaves gap h with bending edge 1, to guarantee the normal operation of expansion tightening wheel.

Bending plate 1 is a block plate, and the broadside side once is bent into bending edge 9, and in the corresponding position perforate of wheel shaft 10 and bolt 7.

Bolt 7 is weldingly fixed on the base plate 6, and the nut 8 on the bolt 7 is a double nuts.

As shown in Figure 2, compare prior art Fig. 1 under both expansion tightening wheel is measure-alike situation, a pit height had dwindled greatly during this was novel.

Fig. 3 is the concrete structure of this new structure figure; See that from Fig. 7 exploded drawings () base plate 6 directly is fixed on mattess by bloated bolt, the bolt 7 in the spring assembly 4 is weldingly fixed on the base plate 6; Fig. 8 medi-spring assembly 4 and

bending plate

1,6 of base plates pass through bolt 7 serial connections, and nut 8 is fixing.

When tensioner rope drags when drawing expansion tightening wheel 2 upwards, expansion tightening wheel 2 drives bending plates 1, and bending plate 1 lower end holds up spring assembly 4, and expanding forces are regulated by double nuts 8 in the upper end; During inefficacy, spring assembly 4 retracts bending plate 1, and safety switch 5 actions of being fixed on the bending plate 1 show that the capital is alert, the elevator stop motion.To reach the purpose of elevator safety operation.

Claims

1. novel swelling device that is applicable to little pit comprises expansion tightening wheel, bending plate, two spring assemblies, base plate, and it is characterized in that: wheel shaft one end of expansion tightening wheel is fixed in the middle of the bending plate, and the wheel shaft other end is fixed with the wheel pressing plate; Safety switch places the bending plate back side and wheel shaft center on same plumb bob vertical; Bolt links to each other the bending edges of bending plate with base plate, bolt is symmetrically arranged in the expansion tightening wheel both sides, and spring assembly wears and be fixed on the bolt; Expansion tightening wheel and bending edge leave the gap.

2. according to the said a kind of novel swelling device that is applicable to little pit of claim 1, it is characterized in that: bending plate is a block plate, and a bending of broadside side is in the corresponding position perforate of wheel shaft and bolt.

3. according to claim 1 or 2 said a kind of novel swelling devices that are applicable to little pit, it is characterized in that: bolt is weldingly fixed on the base plate, and the nut on the bolt is a double nuts.