CN211117381U

CN211117381U - High-efficient worm gear speed reducer machine

Info

Publication number: CN211117381U
Application number: CN201921622863.7U
Authority: CN
Inventors: 王建文; 易淑强
Original assignee: Shanghai Longyu Elevator Accessories Co ltd
Current assignee: Shanghai Longyu Elevator Accessories Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-07-28
Anticipated expiration: 2029-09-27

Abstract

The utility model relates to a high-efficiency worm gear speed reducer, which comprises a gear box, a motor and a coupler for driving and connecting the gear box and the motor, wherein the gear box comprises a box body, a worm gear and a worm, a brake unit is arranged outside the coupler, the brake unit comprises a connecting body, a brake wheel arranged inside the connecting body, an electromagnet and a brake arm arranged outside the connecting body, the connecting body is connected with the shell of the motor, the connecting body is provided with an elongated slot exposing the brake wheel, the brake wheel is fixedly connected with the coupling and coaxially rotates, the electromagnet is provided with an output rod, the brake arm is arranged along the length direction of the side edge of the connecting body, one end of the brake arm is rotatably connected to the side wall of the shell body on the opposite side of the electromagnet, the other end of the brake arm is fixedly connected with the output rod, when the electromagnet receives an action signal, the output rod contracts inwards to drive the brake arm to move inwards, and the brake arm penetrates through the long groove to tightly hold the brake wheel to realize the braking function. The utility model discloses small, the operation is reliable, and bearing capacity and transmission efficiency are high.

Description

High-efficient worm gear speed reducer machine

Technical Field

The utility model relates to a speed reduction and force amplification mechanism in automatic escalator field, concretely relates to high-efficient worm gear speed reducer machine.

Background

The speed reducer is an independent component consisting of gear transmission, worm transmission and gear-worm transmission which are enclosed in a rigid shell, is often used as a speed reduction and force increasing transmission device between a power machine and a working machine, plays a role in matching rotating speed and transmitting amplified torque between the power machine and the working machine or an execution mechanism, and is widely applied to modern machinery.

In the escalator trade, to different lifting height, need can transmit the speed reducer of different power, on the other hand because reasons such as the configuration optimization of escalator, needs occupation space little and can transmit the great powerful escalator host computer, faces low-cost pressure simultaneously, and the urgent need can transmit great power but the lower speed reducer of cost, does not have the centre-to-centre spacing to be the example that the 100mm speed reducer host computer was applied to escalator up to now.

The patent CN104692223A discloses a ZC1 type worm speed reducer structure for a heavy duty escalator, which comprises a motor, wherein the motor is mounted on a motor mounting seat through a fastener, a pair of brake arms are movably connected to the motor mounting seat, and each brake arm is provided with a brake pad; the output end of the motor is connected with one end of the worm through the flexible coupling, the other end of the worm extends into the speed reducer box, and a brake disc is further installed at the end, extending out of the speed reducer box, of the worm, so that automatic and rapid shutdown cannot be achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-efficient worm gear speed reducer machine for solving above-mentioned problem.

The purpose of the utility model is realized through the following technical scheme:

a high-efficiency worm gear speed reducer comprises a gear box, a motor and a coupler for driving and connecting the gear box and the motor, wherein the gear box comprises a box body, a worm wheel and a worm which are meshed with each other and are arranged in the box body, the worm wheel is horizontally arranged in the box body through a worm wheel shaft, the worm is vertically arranged on one side in the box body, the coupler is connected with the output end of the motor and one end of the worm which protrudes out of the box body, a braking unit is arranged on the outer side of the coupler and comprises a connecting body, a braking wheel arranged in the connecting body, an electromagnet and a braking arm arranged outside the connecting body, the connecting body is connected with the shell of the motor, an elongated slot is formed in the connecting body and exposes the braking wheel, the braking wheel and the coupler are fixedly connected and coaxially rotate, the, one end of the output rod is connected with the side wall of the shell body on the opposite side of the electromagnet in a rotating mode, and the other end of the output rod is fixedly connected with the output rod. When the motor is powered off, the output end of the motor cannot stop immediately, and a signal is transmitted to the electromagnet at the moment to enable the output rod of the electromagnet to move inwards, so that the brake wheel is locked by the brake arm, and the worm and gear are quickly decelerated.

Furthermore, the brake unit also comprises a guide rail which is parallel to the output rod and on the same side with the output rod, the guide rail is positioned between the output rod and the connector, the end part of the guide rail penetrates through the brake arm, a spring is arranged at the end part protruding out of the brake arm, the fixed end of the spring is connected with the end part of the guide rail, the free end of the spring is connected with the brake arm, when the electromagnet receives an action signal, the output rod contracts inwards to drive the brake arm to move inwards, and the brake arm drives the spring to move inwards along the guide rail. When the signal is turned off, the output rod does not receive the inward contraction force any more, and the spring is stretched to generate a contraction force, so that the brake arm is driven to move outwards, the brake wheel is loosened by the brake arm, and the motor is convenient to start.

Furthermore, the side wall of the outer shell on the opposite side of the electromagnet is provided with a pair of protruding connecting lugs which are hinged with the end part of the brake arm;

the electromagnet is a double-output electromagnet, springs are arranged at two ends of the guide rail, the brake arms are arranged in pairs, and protruding parts matched with the elongated slots in shape are inwards arranged at positions opposite to the elongated slots. The locking effect can be better by the paired arrangement and the arrangement of the protruding parts.

Furthermore, the worm wheel and the worm are meshed and connected by adopting ZC tooth shapes, the axial center distance between the worm wheel and the worm is 100mm, and the worm adopts a 2-head worm. The set center distance of the worm and gear of the utility model is 100mm, which is reduced by 30-40% compared with the volume of the reducer with the center distance of 125mm used conventionally; the volume of the speed reducer with the specific center distance of 160mm is reduced by 50-60%, the occupied space is saved, and meanwhile, the higher working capacity is kept through the special design of the worm and gear.

The worm helicoid is concave tooth profile on any section, and the worm gear tooth surface is convex tooth profile, and they are concave-convex surface contact when they are meshed, so that the curvature radius of induction method is relatively large, the contact stress of tooth surface is relatively small, when the worm and worm gear are meshed, the pitch line is fallen near the addendum circle, the worm gear is positive displacement, so that the worm gear tooth thickness is relatively large, the tooth bending strength is relatively high, and the capacity of bearing impact load is improved; the shape and distribution of the contact line are better than those of a common cylindrical worm, and a dynamic pressure oil film is favorably formed, so that the transmission efficiency is higher, in short, compared with a common ZA-tooth-shaped or ZK-tooth-shaped worm gear reducer, the transmission of the reducer can transmit larger power with smaller overall dimension, and the transmission efficiency of the reducer is improved.

Further, a bearing is sleeved at the position where two ends of the worm are in contact with the inner side of the box body for supporting, and the bearing adopts an angular contact ball bearing or a tapered roller bearing with a large contact angle; and bearings are sleeved at the positions where the two ends of the worm wheel shaft are contacted with the inner side of the box body for supporting, and the bearings adopt angular contact ball bearings with medium contact angles or tapered roller bearings. The mechanical structure of speed reducer is compacter in the setting up of bearing, and is more steady during the transmission, avoids the speed reducer to cause the workstation "to rock" when stopping.

Further, a pair of angular contact ball bearings or tapered roller bearings are mounted at both ends of the worm in a face-to-face manner; and the bearing arranged at the upper end of the worm is lubricated by adopting an oil bath, so that the lubricating oil can rise to the bearing at the upper end, and the outer ring of the bearing is 1/3-1/2 wide and is positioned in the oil bath. The bearing at the upper end of the worm adopts an oil bath mode, so that the service life of the bearing can be greatly prolonged, and the working temperature of the speed reducer is better reduced.

Further, the two sides of the box body of the gear box are provided with heat dissipation ribs integrally formed with the box body, the heat dissipation ribs are mutually parallel and uniformly arranged, and the gear box has a pattern drawing inclination in a range of 1-3 degrees and a width in a range of 2-10 mm. The radiating ribs can adopt a structure of reinforcing ribs, a fin type structure or an arc-shaped wave type structure, so that a good radiating effect can be achieved, and the appearance is exquisite and attractive.

Furthermore, an oil level observation window and an oil temperature sensor are arranged at the top of the box body of the gearbox. The working condition of the worm can be monitored in real time by observing the oil level and the oil temperature, lubricating oil is added in time or the work of the speed reducer is stopped, the load operation of the speed reducer is avoided, and the service life is shortened.

Furthermore, the motor is a four-pole or six-pole motor with the power range of 0.55kW to 7.5 kW.

Furthermore, one end of the worm wheel shaft protrudes out of the box body, the protruding part is connected with a main driving chain wheel of the escalator through a chain wheel, and after the speed reducer starts to work, the steps of the escalator are dragged to move up or down through the transmission sequence of the motor, the coupler, the worm wheel, the chain wheel and the escalator.

The utility model discloses a speed reducer is the drum brake form, can be used to promote the escalator that the height includes below 6m (contains 6m), and simple structure, function are reliable, and with low costs, shared space are little, have life-span 70000 hours at least, and efficiency 85% above characteristic has filled internal escalator and has not adopted the blank that the centre-to-centre spacing is 100mm speed reducer host computer. A brake wheel is arranged outside the coupler, and locking of the brake wheel is realized through matching of the electromagnet and the brake arm, so that the speed reduction of the worm and the worm wheel is realized quickly; in addition, the brake wheel can be loosened by the brake arm through the restoring force of the spring, the next starting is carried out, and the device is convenient and automatic.

Compared with the prior art, the utility model has the advantages of it is following:

1. a brake unit is arranged on the outer side of the coupler, a brake wheel is used as a brake disc during braking, and the brake wheel is controlled through the mutual matching of a brake arm and an electromagnet, so that the speed reducer is automatically and rapidly shut down;

2. the worm wheel and the worm are in ZC tooth shapes, so that the transmission efficiency can be improved, and the requirements of large bearing capacity and large output torque can be met;

3. the speed reducer has a simple overall structure, the worm wheel machining precision reaches 6 levels, the worm machining precision reaches 4.5 levels, and the transmission efficiency of the whole machine is more than 85% by matching with proper worm surface hardness and preferred worm wheel materials;

4. the bearing at the upper end of the worm adopts an oil bath mode, so that the service life of the bearing can be greatly prolonged, and the working temperature of the speed reducer is better reduced;

5. through install the heat dissipation muscle additional in box both sides, can play fine radiating effect to the appearance is exquisite pleasing to the eye.

Drawings

FIG. 1 is a schematic view of a high-efficiency worm gear reducer;

FIG. 2 is a schematic diagram of a left side view structure of a high-efficiency worm and gear speed reducer;

FIG. 3 is a perspective view of a high efficiency worm gear reducer;

FIG. 4 is a partial perspective view of a high efficiency worm gear reducer (excluding the connecting body and the brake arm);

FIG. 5 is a front view of a high efficiency worm gear reducer;

fig. 6 is a left side view of a high-efficiency worm gear reducer.

In the figure: 1-a box body; 2-a linker; 3-an electric motor; 4-a brake arm; 5-an electromagnet; 6-a coupler; 7-worm gear shaft; 8-heat dissipation ribs; 9-an output rod; 10-a guide rail; 11-a spring; 12-connecting lugs; 13-a brake wheel; 14-chain wheel.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

A high-efficiency worm gear speed reducer is shown in figures 1-6 and comprises a gear box, a motor 3 and a coupling 6 for driving and connecting the gear box and the motor 3, wherein the gear box comprises a box body 1, a worm gear and a worm which are mutually meshed and connected and arranged in the box body 1, the worm gear and the worm are meshed and connected by adopting a ZC tooth form, the center distance between the axes of the worm gear and the worm is 100mm, the worm adopts 2-head worms, the worm gear is horizontally arranged in the box body 1 through a worm gear shaft 7, the worm is vertically arranged at one side inside the box body 1, the motor 3 adopts a quadrupole or hexapole motor with the power of 0.55 kW-7.5 kW, the coupling 6 is connected with the output end of the motor and one end of the worm which protrudes out of the box body, a braking unit is arranged at the outer side of the coupling 6, the braking unit comprises a connecting, the connecting body 2 is connected with a shell of the motor, an elongated slot is formed in the connecting body 2, the brake wheel 13 is exposed, the brake wheel 13 is fixedly connected with the coupler 6 to rotate coaxially, the electromagnet 5 is provided with an output rod 9, the brake arm 4 is arranged along the length direction of the side edge of the connecting body 2, one end of the brake arm is rotatably connected to the side wall of the shell body on the side opposite to the electromagnet 5, the other end of the brake arm is fixedly connected with the output rod 9, when the electromagnet 5 receives an action signal, the output rod 9 contracts inwards to drive the brake arm 4 to move inwards, and the brake arm 13 penetrates through the elongated slot to tightly hold.

The brake unit further comprises a guide rail 10 which is parallel to the output rod 9 and on the same side, the guide rail 10 is located between the output rod 9 and the connecting body 2, the end portion of the guide rail 10 penetrates through the brake arm 4, a spring 11 is arranged on the end portion protruding out of the brake arm 4, the fixed end of the spring 11 is connected with the end portion of the guide rail 10, the free end of the spring is connected with the brake arm 4, when the electromagnet 5 receives an action signal, the output rod 9 contracts inwards to drive the brake arm 4 to move inwards, and the brake arm 4 drives the spring 11 to move inwards along the guide rail 10.

The side wall of the outer shell on the opposite side of the electromagnet 5 is provided with a pair of protruding connecting lugs 12 which are hinged with the end part of the brake arm 4; the electromagnet 5 is a double-output electromagnet, springs 11 are arranged at two ends of the guide rail 10, the brake arms 4 are arranged in pairs, and protruding parts matched with the elongated slots in shape are inwards arranged at positions opposite to the elongated slots.

The positions where the two ends of the worm are contacted with the inner side of the box body 1 are sleeved with bearings for supporting, the bearings adopt angular contact ball bearings with large contact angles, and a pair of angular contact ball bearings are arranged at the two ends of the worm in a face-to-face mode; the bearing arranged at the upper end of the worm is lubricated by adopting an oil bath, so that the lubricating oil can rise to the bearing at the upper end, and the outer ring of the bearing is 1/3-1/2 wide and is in the oil bath. The position that worm-gear shaft 7 both ends and box 1 inboard contacted is equipped with the bearing and supports, and the bearing adopts the angular contact ball bearing of medium contact angle.

The top of the box body 1 of the gear box is provided with an oil level observation window and an oil temperature sensor, two sides of the box body are provided with heat dissipation ribs 8 which are integrally formed with the box body 1, the heat dissipation ribs 8 are mutually parallel and uniformly arranged, the drawing inclination of 1 degree is provided, the range is 2mm, as shown in figures 5-6, the structure of a reinforcing rib can be adopted like the structure in the embodiment, a fin type structure can be adopted, or an arc-shaped wave type structure can be adopted, a good heat dissipation effect can be achieved, and the appearance is exquisite and attractive.

One end of a worm wheel shaft 7 protrudes out of the box body 1, the protruding part is connected with a main driving chain wheel of the escalator through a chain wheel 14, and after the speed reducer starts to work, the steps of the escalator are dragged to ascend or descend by the transmission sequence of a motor-coupler-worm wheel-chain wheel-escalator.

Example 2

A high-efficiency worm gear speed reducer is shown in figures 1-6, a six-level motor with the power of 7.5kW is selected as a motor 3, bearings are sleeved at positions where two ends of a worm are in contact with the inner side of a box body 1 to support, and the bearings are tapered roller bearings with large contact angles. A pair of tapered roller bearings are arranged at two ends of the worm in a face-to-face manner; the bearing arranged at the upper end of the worm is lubricated by adopting an oil bath, so that the lubricating oil can rise to the bearing at the upper end, and the outer ring of the bearing is 1/3-1/2 wide and is in the oil bath. The bearing layer is sleeved at the position where the two ends of the worm wheel shaft 7 are contacted with the inner side of the box body 1 for supporting, and the bearing adopts a tapered roller bearing with a medium contact angle. The heat dissipating ribs 8 have a draft angle of 3 ° and a width in the range of 10 mm. The other structure is the same as in embodiment 1.

Example 3

A high-efficiency worm gear speed reducer is shown in figures 1-6, a motor 3 is a four-pole or six-pole motor with 3.4kW power, bearings are sleeved at positions where two ends of a worm are in contact with the inner side of a box body 1 to support the worm, and the bearings are angular contact ball bearings with large contact angles. A pair of angular contact ball bearings are arranged at two ends of the worm in a face-to-face manner; the bearing arranged at the upper end of the worm is lubricated by adopting an oil bath, so that the lubricating oil can rise to the bearing at the upper end, and the outer ring of the bearing is 1/3-1/2 wide and is in the oil bath. The bearing layer is sleeved at the position where the two ends of the worm wheel shaft 7 are contacted with the inner side of the box body 1 for supporting, and the bearing adopts a tapered roller bearing with a medium contact angle. The heat dissipating ribs 8 have a draft of 2 ° and a width in the range of 7 mm. The other structure is the same as in embodiment 1.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. A high-efficiency worm gear speed reducer comprises a gear box, a motor (3) and a coupler (6) for driving and connecting the gear box and the motor (3), wherein the gear box comprises a box body (1), a worm gear and a worm which are mutually meshed and connected in the box body (1), the worm gear is horizontally arranged in the box body (1) through a worm gear shaft (7), the worm is vertically arranged on one side in the box body (1), the coupler (6) is connected with the output end of the motor and one end of the worm which protrudes out of the box body,

it is characterized in that a braking unit is arranged on the outer side of the coupler (6), the braking unit comprises a connecting body (2), a braking wheel (13) arranged inside the connecting body (2), an electromagnet (5) and a braking arm (4) arranged outside the connecting body (2),

the brake device is characterized in that the connecting body (2) is connected with a shell of the motor, an elongated slot is formed in the connecting body (2), the brake wheel (13) is exposed, the brake wheel (13) is fixedly connected with the coupler (6) to rotate coaxially, the electromagnet (5) is provided with an output rod (9), the brake arm (4) is arranged along the length direction of the side edge of the connecting body (2), one end of the brake arm is rotatably connected to the side wall of the shell on the opposite side of the electromagnet (5), and the other end of the brake arm is fixedly connected with the output rod (9).

2. The efficient worm and gear speed reducer according to claim 1, wherein the brake unit further comprises a guide rail (10) parallel to and on the same side as the output rod (9), the guide rail (10) is located between the output rod (9) and the connecting body (2), the end portion of the guide rail (10) penetrates through the brake arm (4), a spring (11) is arranged at the end portion protruding out of the brake arm (4), the fixed end of the spring (11) is connected with the end portion of the guide rail (10), the free end of the spring is connected with the brake arm (4), when the electromagnet (5) receives an action signal, the output rod (9) contracts inwards to drive the brake arm (4) to move inwards, and the brake arm (4) drives the spring (11) to move inwards along the guide rail (10).

3. The high-efficiency worm gear speed reducer according to claim 2, wherein the side wall of the outer shell opposite to the electromagnet (5) is provided with a pair of protruding connecting lugs (12) which are hinged with the end part of the brake arm (4);

the electromagnet (5) is a double-output electromagnet, springs (11) are arranged at two ends of the guide rail (10), the brake arms (4) are arranged in pairs, and protruding parts matched with the elongated slots in shape are inwards arranged at positions opposite to the elongated slots.

4. The high-efficiency worm gear and worm speed reducer according to claim 1, wherein the worm gear and the worm are meshed and connected by adopting ZC tooth shapes, the axial center distance between the worm gear and the worm is 100mm, and the worm adopts a 2-head worm.

5. The high-efficiency worm gear and worm speed reducer according to claim 1, characterized in that bearings are sleeved at the positions where two ends of the worm are contacted with the inner side of the box body (1) for supporting, and the bearings are angular contact ball bearings or tapered roller bearings with large contact angles;

and bearings are sleeved at the positions where the two ends of the worm wheel shaft (7) are contacted with the inner side of the box body (1) for supporting, and the bearings adopt angular contact ball bearings with medium contact angles or tapered roller bearings.

6. A high-efficiency worm gear and worm reducer as claimed in claim 5, characterized in that a pair of angular contact ball bearings or tapered roller bearings are installed face to face at both ends of the worm; and the bearing arranged at the upper end of the worm is lubricated by adopting an oil bath, so that the lubricating oil can rise to the bearing at the upper end, and the outer ring of the bearing is 1/3-1/2 wide and is positioned in the oil bath.

7. The efficient worm and gear speed reducer according to claim 1, wherein heat dissipation ribs (8) which are integrally formed with the box body (1) are arranged on two sides of the box body (1) of the gear box, the heat dissipation ribs (8) are mutually parallel and uniformly arranged, have a draft angle ranging from 1 degree to 3 degrees, and have a width ranging from 2mm to 10 mm.

8. The high-efficiency worm and gear speed reducer according to claim 1, characterized in that an oil level observation window and an oil temperature sensor are arranged on the top of the box body (1) of the gearbox.

9. The high-efficiency worm and gear speed reducer according to claim 1, wherein the motor (3) is a four-pole or six-pole motor with power ranging from 0.55kW to 7.5 kW.

10. A high-efficiency worm gear and worm reducer as claimed in any one of claims 1 to 9, wherein one end of the worm gear shaft (7) protrudes out of the box body (1), the protruding part is connected with a main driving chain wheel of the escalator through a chain wheel (14), and after the reducer starts to work, the step of the escalator is dragged to move up or down by the transmission sequence of the motor-coupler-worm-gear-chain wheel-escalator.