CN212769562U

CN212769562U - Differential gear box for crane

Info

Publication number: CN212769562U
Application number: CN202020636169.7U
Authority: CN
Inventors: 顾永兴; 蒋浩; 王飞飞; 马星茹
Original assignee: Jiangsu Guomao Reducer Group Co ltd
Current assignee: Jiangsu Guomao Reducer Group Co ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-03-23
Anticipated expiration: 2030-04-24

Abstract

A hoisting differential gear box comprises a box body, two sets of planetary differential gear trains which are connected in parallel and have the same number of teeth, a plurality of gears and two input shafts; the two planetary differential gear trains are composed of a sun gear, an inner gear ring, a bearing, a planet carrier and a planet gear; the two planet carriers are supported and arranged on the box body; the inner gear ring is supported on the two planet carriers through bearings and can freely rotate around the planet carriers; the planet carrier is supported and installed on the box body and is used as the output of the gear box; the planet wheel is arranged in a pin hole on the planet carrier; the input shaft divides power to the two sun gears through the gear; the input shaft is meshed with the external teeth of the internal gear ring through a gear. The utility model improves the reliability and maintainability of the device; the structure weight of the crane is reduced, the cost is reduced, the operation speed is improved, and the efficiency is high; the gear box has compact structure and small overall dimension, and saves the manufacturing cost; by selecting high-performance materials and adopting an advanced process, the reliability of the gear box is improved, the service life of the gear box is prolonged, the maintenance is simple, and the cost is reduced.

Description

Differential gear box for crane

Technical Field

The utility model relates to a gear box design technical field, concretely relates to jack-up differential gear case.

Background

When the port portal crane works, the port portal crane moves in two directions of lifting and translation. In the traditional design, two independent transmission systems are respectively used, and motor gear boxes for lifting movement are arranged on the trolley; the running transmission system of the trolley is arranged on the trolley or in a machine room on the upright post, and the trolley is pulled to run through a steel wire rope. The lifting is main transmission, the load is large, a high-power motor and a large-size gear box are needed, the weight of the motor and the gear box is large, the running trolley and a main beam need to be strengthened, the weight of the whole structure is greatly increased, and the manufacturing cost is improved. Meanwhile, the weight of the trolley, the motor and the speed reducer is heavy, so that the trolley is not beneficial to fast running and the efficiency of loading and unloading operation is improved, and the energy consumption is high.

Disclosure of Invention

In order to improve the limitation of above-mentioned transmission structure, satisfy the requirement of harbour loading and unloading high efficiency, low consumption, high reliability, the utility model provides a novel jack-up differential gear case.

A hoisting differential gear box comprises a box body (10), two sets of planetary differential gear trains which are connected in parallel and have the same number of teeth, a plurality of gears and two input shafts (1) and (6); the two planetary differential gear trains are respectively composed of a sun gear, an inner gear ring, a bearing, a planet carrier and a planet gear; the two planet carriers are supported and arranged on the box body (10); the inner gear ring (11) and the inner gear ring (18) are respectively supported on two planet carriers (13) and (17) through bearings (12) and (16) and can freely rotate around the planet carriers; the planet carriers (13) and (17) are supported and installed on the box body (10) and used as the output of the gear box; the planet wheels (14) and (15) are respectively arranged in pin holes on the planet carriers (13) and (17); the input shaft (6) divides power to two sun wheels (5) and (9) through a gear (4), a gear (7) and a gear (8), the rotation directions and the rotation speeds of the sun wheels and the input shaft are synchronous, and power is input into the planetary differential gear train; the input shaft (1) is meshed with the external teeth of the inner gear ring (11) and the inner gear ring (18) through the gear (2) and the gear shaft (3).

Furthermore, external teeth on the two inner gear rings are meshed, so that the rotating speeds of the inner gear rings are synchronous, and the rotating directions are opposite.

Furthermore, the hoisting differential gear box is arranged in the opening and closing speed reducer (20) and the lifting speed reducer (23), power is input through the opening and closing motor (19) and the lifting motor (24) through an input shaft, and the hoisting differential gear box outputs power to the opening and closing winding drum (21) and the lifting winding drum (22).

Furthermore, the hoisting differential gear box automatically distributes the power of the lifting and starting and stopping motor to the two output planet carriers by utilizing the power splitting and synthesizing function of the differential gear train, and synthesizes the power of the running motor (25) to the output planet carriers.

Furthermore, all gears of the hoisting differential gear box are subjected to carburizing and quenching treatment by low-carbon alloy steel, and are subjected to precision gear grinding processing with the precision of 6 grades.

Further, the hoisting differential gear box employs splash lubrication.

The utility model has the advantages that: 1. the transmission system of the crane is simplified, and the reliability and maintainability of the equipment are improved; 2. the structure weight of the crane is reduced, the cost is reduced, the operation speed is improved, and the efficiency is high; 3. the gear box has compact structure and small overall dimension, and saves the manufacturing cost; 4. by selecting high-performance materials and adopting an advanced process, the reliability of the gear box is improved, the service life of the gear box is prolonged, the maintenance is simple, and the service cost of the whole service life is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the hoisting differential gear box of the present invention.

Fig. 2 is a schematic view of the hoisting differential gear box applied to a speed reducer.

In the figure, 1-input shaft, 2-gear, 3-gear shaft, 4-gear, 5-sun gear, 6-input shaft, 7-gear, 8-gear, 9-sun gear, 10-box, 11-inner gear ring, 12-bearing, 13-planet carrier, 14-planet gear, 15-planet gear, 16-bearing, 17-planet carrier, 18-inner gear ring, 19-start and stop motor, 20-start and stop speed reducer, 21-start and stop drum, 22-lift drum, 23-lift speed reducer, 24-lift motor and 25-trolley running motor.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.

A hoisting differential gear box mainly comprises: the planetary gear set comprises an input shaft 1, a gear 2, a gear shaft 3, a gear 4, a sun gear 5, an input shaft 6, a gear 7, a gear 8, a sun gear 9, a box 10, an inner gear ring 11, a bearing 12, a planet carrier 13, planet wheels 14, planet wheels 15, a bearing 16, a planet carrier 17 and an inner gear ring 18.

A hoisting differential gear box comprises a box body 10, two sets of planetary differential gear trains which are connected in parallel and have the same number of teeth, a plurality of gears and two input shafts 1 and 6.

The two planetary differential gear trains are composed of a sun gear, an inner gear ring, a bearing, a planet carrier and a planet gear.

The input shaft 6 divides power to the two sun gears 5 and 9 through the gear 4, the gear 7 and the gear 8, and inputs power to the planetary gear train for lifting or opening and closing; the input shaft 1 is meshed with the external teeth of the inner gear ring 11 and the inner gear ring 18 through the gear 2 and the gear shaft 3; the inner gear ring 11 and the inner gear ring 18 are supported on the planet carrier through bearings 12 and 16 and can freely rotate around the planet carrier; the planet carriers 13 and 17 are supported and mounted on the box body 10 by bearings, the output shaft ends are connected with the winding drum, and the planet wheels are mounted in pin holes in the planet carriers.

The hoisting differential gear box fully utilizes the power splitting and synthesizing function of the differential gear train, automatically distributes the power of the lifting and starting and stopping motor to the two output planet carriers 13 and 17, synthesizes the power of the running motor 25 to the output planet carriers 13 and 17, and has reliable work. All gears of the gear box are subjected to carburizing and quenching treatment by low-carbon alloy steel and are subjected to precise gear grinding, the precision is 6 grade, the size of the whole gear box is small, the efficiency is high, the noise is low, and the gear box is lubricated in a splashing mode.

The gearbox and spool arrangement is shown in fig. 2, where the function of opening and closing the spool 21 is: the grab bucket is opened and closed when rotating in the same direction and at the same speed, and the trolley is driven to move when the rotating speed or the rotating direction is different; the other pair of lifting drums 22 can lift and descend when rotating in the same direction and at the same speed, and the trolley is driven to move when the rotating speed or the rotating direction is different. The opening and closing are driven by a motor 19, the lifting is driven by a motor 24, and the trolley runs by a motor 25. The start-stop motor 19, the lifting motor 24 and the running motor 25 must be capable of freely starting and stopping without stopping when the gear box runs.

When the electric car works, if the input shaft 1 is braked, the input shaft 6 is driven by the motor to rotate, the two planetary gear trains cannot rotate because the inner gear rings 11 and 18, the power input by the input shaft 6 is decelerated by the two planetary gear trains respectively and then is output by the planetary gear frames 13 and 17 in the same direction and at the same speed to drive the winding drum, at the moment, the car is static, and the grab bucket is opened and closed or lifted; if the input shaft 6 is braked, the input shaft 1 works, power is transmitted to the inner gear rings 11 and 18 through the gears 2 and 3, the winding drum is driven by the planet carriers 13 and 17 in a reverse constant speed mode after the speed is reduced through the two planet gear trains, at the moment, the lifting, the opening and the closing are stopped, and the trolley runs; if the shaft 1 and the shaft 6 input power simultaneously, the sun gear and the inner gear ring of the two planetary gear trains are driving parts, the two planetary frames output power but are asynchronous, and the two winding drums have a rotation speed difference, so that the grab bucket can be lifted, opened, closed and lifted simultaneously.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment, but all equivalent modifications or changes made by those skilled in the art according to the present invention should be included in the protection scope of the claims.

Claims

1. The utility model provides a jack-up differential gear case, includes box, two sets of parallelly connected planetary differential gear trains that the number of teeth is the same, a plurality of gear and two input shafts, its characterized in that:

the two planetary differential gear trains are respectively composed of a sun gear, an inner gear ring, a bearing, a planet carrier and a planet gear;

the two planet carriers are supported and arranged on the box body;

the inner gear rings are supported on the two planet carriers through bearings respectively and can rotate freely around the planet carriers; the planet carrier is supported and installed on the box body and is used as the output of the gear box; the planet wheels are respectively arranged in pin holes on the planet carrier;

the input shaft divides power to the two sun gears through the gear, the rotation directions and the rotation speeds of the sun gears and the input shaft are synchronous, and power is input into the planetary differential gear train;

the input shaft is meshed with the external teeth of the internal gear ring through a gear.

2. The lifting differential gear box according to claim 1, wherein: the outer teeth on the two inner gear rings are meshed with each other, so that the inner gear rings rotate synchronously in opposite directions.

3. The lifting differential gear box according to claim 1, wherein: the hoisting differential gear box is arranged in the opening and closing speed reducer and the lifting speed reducer, power is input through the opening and closing motor and the lifting motor through the input shaft, and the hoisting differential gear box outputs power to the opening and closing winding drum and the lifting winding drum.

4. The lifting differential gear box according to claim 1, wherein: the hoisting differential gear box automatically distributes the power of the lifting and starting and stopping motor to the two output planet carriers by utilizing the power splitting and synthesizing function of the differential gear train, and synthesizes the power of the running motor to the output planet carriers.

5. The lifting differential gear box according to claim 1, wherein: all gears of the hoisting differential gear box are subjected to low-carbon alloy steel carburizing and quenching treatment and are subjected to precise gear grinding processing, and the precision is 6-grade.

6. The lifting differential gear box according to claim 1, wherein: the hoisting differential gear box adopts splash type lubrication.