CN112960623B

CN112960623B - Large-reduction-ratio compact electric lifter

Info

Publication number: CN112960623B
Application number: CN202110393059.1A
Authority: CN
Inventors: 刘文辉
Original assignee: Fujian Dongshan County Huiyongtai Sports Goods Co ltd
Current assignee: Fujian Dongshan County Huiyongtai Sports Goods Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2022-07-26
Anticipated expiration: 2040-03-20
Also published as: CN111348603A; CN113086911B; CN111348603B; CN113086911A; CN112960623A

Abstract

The invention discloses a compact electric lifter with a large reduction ratio, which comprises a shell and a rope wheel, wherein an installation cavity for installing the rope wheel is arranged in the shell; a speed reducer is arranged in the shell, the output end of the speed reducer is connected with the rope wheel, and the input end of the speed reducer is provided with a power input shaft; and a speed-limiting brake device is arranged on the power input shaft. Compared with the prior art, the speed limiting brake device is arranged, so that the speed can be automatically limited when the rotating speed of the rope wheel is overhigh, and the use safety of the electric lifter is improved.

Description

Compact electric lifter with large reduction ratio

The invention relates to an improved electric lifter and a manufacturing method thereof, which is a divisional application of a Chinese patent application No. 202010198624.4, wherein the application No. of the original application is 202010198624.4, and the application date is 20/03/2020.

Technical Field

The invention relates to the field of rescue appliances, in particular to a large-reduction-ratio compact electric lifter.

Background

In activities such as aerial work, crossing evacuation, escape, rescue, shaft rescue, tunnel exploration and the like, elevators are often used, the existing elevators are divided into ascenders and descenders, ropes are wound on rope pulleys, and people ascend and descend along the ropes by using the ascenders and the descenders.

The existing lifter is easy to cause the over-high rotating speed of the rope wheel in the using process, so that the falling speed of a user is too high, and the user is easily injured.

In view of the above, the applicant has made an intensive study on the above-mentioned defects in the prior art, and has made this invention.

In view of the above, the applicant has made an intensive study on the above defects in the prior art, and has developed the present invention.

Disclosure of Invention

The invention mainly aims to provide a large-reduction-ratio compact electric lifter which has the characteristic of improving the use safety of the electric lifter.

In order to achieve the above purpose, the solution of the invention is:

a large reduction ratio compact electric lifter comprises a shell and a rope wheel, wherein an installation cavity for installing the rope wheel is arranged in the shell, a rope inlet and a rope outlet are formed in the shell above the rope wheel, and a rope penetrates through the rope inlet and the rope outlet and is tightly wound on a rope groove of the rope wheel; a speed reducer is arranged in the shell, the output end of the speed reducer is connected with the rope wheel, and the input end of the speed reducer is provided with a power input shaft; and a speed-limiting brake device is arranged on the power input shaft.

Furthermore, the speed-limiting brake device comprises a fixed seat, a first swing arm, a second swing arm and a tension spring, wherein a speed-limiting cavity is formed on the shell, the fixed seat is fixedly connected to the power input shaft, one end of the first swing arm and one end of the second swing arm are hinged to the fixed seat, and two ends of the tension spring are respectively connected to the first swing arm and the second swing arm; brake pads are fixedly arranged on the outer side walls of the first swing arm and the second swing arm respectively; along with the increase of the rotating speed of the power input shaft, the brake pads on the first swing arm and the second swing arm are abutted against one side of the inner wall of the speed limiting cavity.

Furthermore, the inner wall of the speed limiting cavity is detachably and fixedly connected with a brake lining.

Further, decelerator is doublestage planetary gear reducer, doublestage planetary reducer is including first order internal gear and second grade internal gear, set up a plurality of fixed sand grips on the lateral wall of first order internal gear and second grade internal gear, be provided with in the casing with a plurality of fixed recesses of fixed sand grip matched with.

Further, the electric lifter also comprises a directional mechanism for switching the rope wheel between forward rotation and reverse rotation; the orientation mechanism comprises a gear shaft, a positioning shifting tooth, a positioning bead and a reversing shifting rod; the gear shaft is coaxially connected with the rope pulley; a forward ratchet and a reverse ratchet are formed on the positioning shifting teeth and are symmetrically arranged; the reversing shifting lever is fixedly connected with the positioning shifting tooth and drives the positioning shifting tooth to be connected to the side part of the gear shaft in a rotating manner; the positioning shifting teeth are provided with a forward position and a reverse position; when the positioning shifting teeth are located at the forward position, the forward ratchets abut against the gear shaft, the reverse ratchets are separated from the gear shaft, and the gear shaft can rotate forward; when the positioning shifting teeth are positioned at the reverse positions, the reverse ratchets abut against the gear shaft, the forward ratchets are separated from the gear shaft, and the gear shaft can rotate reversely; the positioning beads are arranged in the shell and are abutted against the bead grooves on the positioning poking teeth, which correspond to the forward position and the reverse position respectively.

Further, one side and/or both sides of the shell are/is provided with a rope arranging ring.

Furthermore, a plurality of friction blocks used for increasing the friction force with the rope are arranged on the side wall of the rope groove of the rope wheel at intervals.

Further, advance the rope mouth with go out and be provided with the rubber shield on the rope mouth, including can imbed respectively on the rubber shield advance the rope mouth with go out the intraoral first cock body and the second cock body of rope, first cock body and second cock body coupling, be formed with the rope hole on first cock body and the second cock body respectively, the rope hole lateral part is formed with and supplies the rope discrepancy the groove of advancing of rope hole.

Furthermore, the shells beside the rope inlet and the rope outlet are respectively provided with a propping device; the propping device comprises a sliding groove, a pulley, a sliding rod and a propping spring; the sliding groove is formed in the shell, the pulley is connected to one end of the sliding rod in a rotating mode, the sliding rod is arranged in the sliding groove in a sliding mode, the abutting spring abuts against one end, far away from the pulley, of the sliding rod, and the pulley on the sliding rod abuts against the rope towards the inner side of the pulley.

A method of manufacturing a large reduction ratio compact electric lifter, comprising the steps of:

firstly, casting and molding the shell, wherein the mounting cavity, the speed limiting cavity and the sliding groove are integrally molded on the shell;

secondly, the prepared rope wheel and the speed reducer are arranged in the installation cavity, and the speed-limiting brake device is arranged in the speed-limiting cavity.

And thirdly, winding a test rope to test the speed-limiting brake device.

After the structure is adopted, the invention relates to a large-reduction-ratio compact electric lifter, which at least has the following beneficial effects:

when the rope sheave is used, the power input shaft is connected with an external electric driving device, and the rotation of the power input shaft drives the rope sheave to rotate through the speed reduction and torque increase effects of the speed reduction device. When the rotating speed of the rope wheel is low, namely the rotating speed of the power input shaft is low, the speed-limiting brake device does not work. When the rotating speed of the rope wheel is too high, the speed-limiting brake device plays a role in limiting speed, so that the rotating speed of the rope wheel is reduced.

And secondly, the first swing arm and the second swing arm on the speed-limiting brake device resist the outward swinging of the tension force of the tension spring under the action of centrifugal force, so that the brake pad is driven to abut against the inner wall of the speed-limiting cavity, and the speed-limiting effect is realized. Through setting up the brake inside lining can change new brake inside lining after the brake inside lining wearing and tearing, is favorable to prolonging electric lift's life.

And thirdly, the internal gear and the mounting and fixing structure of the shell are simplified through limiting convex strips arranged on the first-stage internal gear and the second-stage internal gear.

And fourthly, through the arrangement of the orientation mechanism, the rope wheel can only rotate in a single direction, so that the electric lifter can only ascend or descend along the rope, the accidental reverse movement of the lifter or the rope can be avoided, and the accidental falling of the lifter during ascending is particularly avoided.

Compared with the prior art, the speed limiting brake device is arranged, so that the speed can be automatically limited when the rotating speed of the rope wheel is overhigh, and the use safety of the electric lifter is improved.

Drawings

Fig. 1 is a schematic perspective view of an electric lifter according to the present invention.

Fig. 2 is a schematic perspective view of another embodiment of the present invention.

Fig. 3 and 4 are schematic exploded views of the present invention.

Fig. 5 is an exploded view of the installation of the limit brake device.

Fig. 6 is a schematic front view of the spacing brake device.

Fig. 7 is a perspective view of the reversing lever of the orientation mechanism.

Fig. 8 and 9 are exploded views of the orientation mechanism.

Fig. 10 and 11 are schematic views illustrating a use state of the present invention.

Fig. 12 is a schematic structural view of the electric driving device.

Fig. 13 is a schematic perspective view of the installation of the propping device.

Fig. 14 is a front view of the propping device.

Fig. 15 is an exploded view of the propping device.

Fig. 16 is an enlarged schematic view of a portion a in fig. 15.

In the figure:

a housing 1; a rope inlet 11; a rope outlet 12; a fixing groove 13; a rope handling ring 14; a rubber dust cap 15; a first plug body 151; a second plug body 152; a rope hole 153; an access slot 154; a rate-limiting chamber 16; a brake lining 161; a power input shaft 17; a mounting cavity 18;

a sheave 2; a friction block 21;

a reduction device 3; the first-stage ring gear 31; a second stage ring gear 32; a fixed convex strip 33 speed limiting brake device 4; a fixed base 41; a first swing arm 42; a second swing arm 43; a tension spring 44; a brake pad 45;

an orientation mechanism 5; a gear shaft 51; a positioning dial 52; a forward ratchet 521; a reverse ratchet 522; a bead tank 523; a positioning bead 53; a reversing lever 54;

a butting device 6; a slide groove 61; a stopper block 611; a pulley 62; a slide bar 63; a limit tailstock 631; a stopper rod 632; a biasing spring 64; a cover plate 65; a limit chute 651;

and an electric drive 7.

Detailed Description

In order to further explain the technical scheme of the invention, the invention is explained in detail by the specific embodiment.

As shown in fig. 1 to 16, the present invention relates to a compact electric elevator with large reduction ratio, which comprises a housing 1 and a sheave 2, wherein a mounting cavity 18 for mounting the sheave 2 is arranged in the housing 1, a rope inlet 11 and a rope outlet 12 are arranged on the housing 1 above the sheave 2, and ropes pass through the rope inlet 11 and the rope outlet 12 and are tightly wound on rope grooves of the sheave 2; a speed reducer 3 is arranged in the shell 1, the output end of the speed reducer 3 is connected with the rope wheel 2, and the input end of the speed reducer 3 is provided with a power input shaft 17; and the power input shaft 17 is provided with a speed-limiting brake device 4.

In this way, in the large reduction ratio compact electric lifter according to the present invention, when in use, the power input shaft 17 is connected to the external electric driving device 7, and the rotation of the power input shaft 17 drives the sheave 2 to rotate by the speed reduction and torque increase action of the reduction gear 3. When the rotation speed of the rope wheel 2 is low, namely the rotation speed of the power input shaft 17 is low, the speed-limiting brake device 4 does not work. When the rotating speed of the rope wheel 2 is too high, the speed-limiting brake device 4 plays a role in limiting speed, so that the rotating speed of the rope wheel 2 is reduced.

Preferably, the speed-limiting brake device 4 includes a fixed seat 41, a first swing arm 42, a second swing arm 43 and a tension spring 44, the housing 1 is formed with a speed-limiting cavity 16, the fixed seat 41 is fixedly connected to the power input shaft 17, one end of the first swing arm 42 and one end of the second swing arm 43 are hinged to the fixed seat 41, and two ends of the tension spring 44 are respectively connected to the first swing arm 42 and the second swing arm 43; the outer side walls of the first swing arm 42 and the second swing arm 43 are respectively fixedly provided with a brake pad 45; with the increase of the rotating speed of the power input shaft 17, the brake pads 45 on the first swing arm 42 and the second swing arm 43 are abutted against one side of the inner wall of the speed limiting cavity 16. The first swing arm 42 and the second swing arm 43 on the speed-limiting brake device 4 resist the pulling force of the tension spring 44 to swing outwards under the action of centrifugal force, so that the brake pad 45 is driven to abut against the inner wall of the speed-limiting cavity 16, and the speed-limiting effect is realized. Preferably, a brake lining 161 is detachably and fixedly connected to the inner wall of the speed limiting cavity 16. Through setting up brake inside lining 161, brake block 45 under the effect of centrifugal force gradually with brake inside lining 161 offsets a friction, can change new brake inside lining 161 after the wearing and tearing of brake inside lining 161, is favorable to prolonging electric lift's life.

Preferably, decelerator 3 is doublestage planetary gear reducer, doublestage planetary reducer is including first order internal gear 31 and second level internal gear 32, set up a plurality of fixed sand grip 33 on the lateral wall of first order internal gear 31 and second level internal gear 32, be provided with in the casing 1 with a plurality of fixed recesses 13 of fixed sand grip 33 matched with. The mounting and fixing structure of the internal gears and the shell 1 is simplified by the limiting convex strips arranged on the first-stage internal gear 31 and the second-stage internal gear 32.

Preferably, the electric lifter further comprises a directional mechanism 5 for switching the sheave 2 between forward rotation and reverse rotation; the orientation mechanism 5 comprises a gear shaft 51, a positioning shifting tooth 52, a positioning ball 53 and a reversing shifting rod 54; the gear shaft 51 is coaxially connected with the rope pulley 2; a forward ratchet 521 and a reverse ratchet 522 are formed on the positioning shifting tooth 52, and the forward ratchet 521 and the reverse ratchet 522 are symmetrically arranged; the reversing shifting rod 54 is fixedly connected with the positioning shifting tooth 52 and drives the positioning shifting tooth 52 to be rotationally connected to the side part of the gear shaft 51; the positioning finger 52 has a forward position and a reverse position; when the positioning shifting teeth 52 are located at the forward position, the forward ratchet 521 abuts against the gear shaft 51, the reverse ratchet 522 is disengaged from the gear shaft 51, and the gear shaft 51 can rotate in the forward direction; when the positioning shifting teeth 52 are at the reverse position, the reverse ratchet teeth 522 are abutted against the gear shaft 51, the forward ratchet teeth 521 are disengaged from the gear shaft 51, and the gear shaft 51 can rotate reversely; the positioning ball 53 is disposed in the housing 1 and abuts against the ball groove 523 of the positioning shifting tooth 52 corresponding to the forward position and the reverse position respectively. A spring for abutting the positioning ball 53 against the ball groove 523 is arranged between the positioning ball 53 and the housing 1. Through setting up orienting mechanism 5, rope sheave 2 can only unidirectional rotation for the electric lift only can rise or descend along the rope, can avoid taking place unexpected reverse movement of lift or rope, has avoided unexpected whereabouts when the lift rises especially.

Preferably, the case 1 is provided with a rope handling ring 14 at one side and/or both sides. By arranging the rope arranging ring 14, drooping ropes can be arranged, and the influence of free swing of the ropes along with wind on the safety of a user is reduced.

Preferably, a plurality of friction blocks 21 for increasing the friction force with the rope are arranged on the side wall of the rope groove of the rope pulley 2 at intervals. The friction block 21 increases the tightness of the rope against the sheave 2. The safety is guaranteed.

Preferably, a rubber dust cover 15 is disposed on the rope inlet 11 and the rope outlet 12, the rubber dust cover 15 includes a first plug body 151 and a second plug body 152 that can be respectively embedded into the rope inlet 11 and the rope outlet 12, the first plug body 151 and the second plug body 152 are integrally connected, rope holes 153 are respectively formed on the first plug body 151 and the second plug body 152, and an access groove 154 for allowing a rope to enter and exit the rope hole 153 is formed on a side portion of the rope hole 153. When the electric lifter is not used, the rubber dustproof cover 15 can reduce the external dust from entering the electric lifter through the rope inlet 11 and the rope outlet 12.

In order to increase the connection tightness between the rope and the rope wheel 2, preferably, each of the housings 1 near the rope inlet 11 and the rope outlet 12 is provided with a propping device 6; the abutting device 6 comprises a sliding groove 61, a pulley 62, a sliding rod 63 and an abutting spring 64; the sliding groove 61 is formed on the housing 1, the pulley 62 is rotatably connected to one end of the sliding rod 63, the sliding rod 63 is slidably disposed in the sliding groove 61, the abutting spring 64 abuts against one end of the sliding rod 63 far away from the pulley 62, and the pulley 62 on the sliding rod 63 abuts against the rope towards the inner side of the pulley 62. Through the abutting device 6, whether the ropes outside the rope inlet 11 and the rope outlet 12 are in a stressed state or not, the ropes can be in close contact with the rope wheel 2, and the service performance of the electric lifter is ensured. The part of the rope, which is not stressed, in contact with the sheave 2 is pressed against by the pulley 62, so that the rope can be in close contact with the rope groove of the sheave 2.

Preferably, the sliding groove 61 is provided in a radial direction of the sheave 2, and the sliding rod 63 slides in the radial direction of the sheave 2. The sliding groove 61 is provided along the radial direction of the sheave 2, so that the pulley 62 can press the rope against the sheave 2 along the radial direction, and the pressure direction of the pulley 62 acting on the rope is perpendicular to the tangential direction of the sheave 2. Preferably, a limiting tail seat 631 is formed at one end of the sliding rod 63 close to the abutting spring 64, a limiting block 611 is formed in the sliding groove 61, and the limiting tail seat 631 abuts against the limiting block 611 to limit the maximum distance that the sliding rod 63 moves in the direction of the sheave 2. The limiting block 611 and the limiting tailstock 631 limit the maximum sliding distance of the sliding rod 63, and when a rope is not inserted into the rope pulley 2, the pulley 62 keeps a certain distance from the bottom of the rope groove of the rope pulley 2, so that the rope can be inserted conveniently. If the rope needs to be replaced after being used for a period of time, the replaced rope can be conveniently wound on the groove of the rope wheel 2.

Preferably, a cover plate 65 covering the sliding groove 61 is installed on the housing 1, a limiting rod 632 is formed on the sliding rod 63, and a limiting sliding groove 651 for the limiting rod 632 to pass through and slide therein is formed on the cover plate 65. Further, the cover plate 65 is detachably mounted to the housing 1 by a fixing member. The cover plate 65 is detachably mounted on the housing 1, so that the slide bar 63 can be conveniently overhauled and replaced.

The invention also provides a manufacturing method of the large-reduction-ratio compact electric lifter, which comprises the following steps:

firstly, casting and molding the shell 1, wherein the installation cavity 18, the speed limiting cavity 16 and the sliding groove 61 are integrally molded on the shell 1;

trimming the sliding groove 61 to form a smooth sliding surface matched with the sliding rod 63;

thirdly, the prepared rope wheel 2 and the speed reducer 3 are arranged in the installation cavity 18, the speed-limiting brake device 4 is arranged in the speed-limiting cavity 16, the prepared pulley 62, the sliding rod 63 and the abutting spring 64 are arranged in the sliding groove 61, and lubricating grease is added;

and fourthly, winding a test rope, and testing the pulley 62, the sliding rod 63 and the speed-limiting brake device 4.

Compared with the prior art, the speed limiting brake device 4 is arranged, so that the speed can be automatically limited when the rotating speed of the rope wheel 2 is too high, and the use safety of the electric lifter is improved.

The above embodiments and drawings are not intended to limit the form and style of the product of the present invention, and any suitable changes or modifications thereof by one of ordinary skill in the art should be considered as not departing from the scope of the present invention.

Claims

1. A large reduction ratio compact electric lifter is characterized by comprising a shell and a rope pulley, wherein a mounting cavity for mounting the rope pulley is arranged in the shell, a rope inlet and a rope outlet are formed in the shell above the rope pulley, and a rope penetrates through the rope inlet and the rope outlet and is tightly wound on a rope groove of the rope pulley; a speed reducer is arranged in the shell, the output end of the speed reducer is connected with the rope wheel, and the input end of the speed reducer is provided with a power input shaft; the power input shaft is provided with a speed-limiting brake device;

the speed reducer is a two-stage planetary gear speed reducer, the two-stage planetary gear speed reducer comprises a first-stage internal gear and a second-stage internal gear, a plurality of fixing convex strips are arranged on the outer side walls of the first-stage internal gear and the second-stage internal gear, and a plurality of fixing grooves matched with the fixing convex strips are formed in the shell;

the speed-limiting brake device comprises a fixed seat, a first swing arm, a second swing arm and a tension spring, wherein a speed-limiting cavity is formed on the shell, the fixed seat is fixedly connected to the power input shaft, one ends of the first swing arm and the second swing arm are hinged to the fixed seat, and two ends of the tension spring are respectively connected to the first swing arm and the second swing arm; brake pads are fixedly arranged on the outer side walls of the first swing arm and the second swing arm respectively; and along with the increase of the rotating speed of the power input shaft, the brake pads on the first swing arm and the second swing arm are abutted against one side of the inner wall of the speed limiting cavity.

2. The compact electric high reduction ratio elevator according to claim 1, wherein a brake lining is detachably fixed to an inner wall of said speed limiting chamber.

3. A large reduction ratio compact electric lifter according to claim 1, wherein a rational rope loop is provided at one side and/or both sides of the housing.

4. The compact electric elevator with large reduction ratio as set forth in claim 1, wherein a plurality of friction blocks for increasing friction with the rope are provided at intervals on the side wall of the rope groove of said rope sheave.

5. The electric high reduction ratio compact elevator according to claim 1, wherein rubber dust covers are provided on the rope inlet and the rope outlet, the rubber dust covers include a first plug body and a second plug body that can be inserted into the rope inlet and the rope outlet, respectively, the first plug body and the second plug body are integrally connected, rope holes are formed in the first plug body and the second plug body, respectively, and an inlet and outlet groove for allowing the rope to enter and exit the rope holes is formed in a side portion of the rope hole.