CN218000344U - Planetary reducer for tower crane - Google Patents

Abstract

Tower crane is planetary reducer for machine includes the drive shaft of being connected with the motor, with drive shaft splined connection integral key shaft, with integral key shaft splined connection's one-level planetary drive, with one-level planetary drive splined connection's second grade planetary drive and with second grade planetary drive splined connection's tertiary planetary drive, its characterized in that: the inner gear rings in all stages of planetary transmission are fixed in sequence, the inner gear rings in three stages of planetary transmission are coaxially fixed with a winding drum support for mounting a winding drum, the winding drum support is supported on a planet carrier of the three stages of planetary transmission through a cylindrical roller bearing, the planet carrier of the three stages of planetary transmission is a squirrel-cage planet carrier, and the planet carrier of the first stage planetary transmission and the planet carrier of the second stage planetary transmission are both single-arm planet carriers. The utility model discloses guarantee the reliability of moment of torsion output, promote planetary reducer's transmission effect, effectively improve planetary reducer inner structure's compactedness, reduce weight, integral key shaft and one-level sun gear components of a whole that can function independently set up, reduce the machine-shaping degree of difficulty, easily assembly combination.

Description

Planetary reducer for tower crane

Technical Field

The utility model relates to a tower crane is planetary reducer for crane belongs to planetary reducer technical field.

Background

The tower crane is common hoisting equipment on a construction site, and is called a tower crane for short, and comprises a prime motor (such as a motor or a hydraulic motor), a speed reducer, a winding drum and a steel wire rope, wherein an output shaft of the prime motor is connected with the speed reducer, the speed reducer reduces the rotating speed of the prime motor and then transmits the reduced rotating speed to the winding drum so as to drive the winding drum to rotate, one end of the steel wire rope is wound on the winding drum, and the other end of the steel wire rope is connected with a heavy object; when the winding drum rotates forwards, the steel wire rope is wound by the winding drum, and accordingly, the heavy object is lifted; when the drum rotates in reverse, the wire rope is released and accordingly the weight is lowered under the action of gravity. In order to manufacture a large-tonnage tower crane, the corresponding planetary reducer has large weight, large volume and high cost. The main defect that exists of current planetary reducer for tower crane has:

1. the low-speed planet carrier has larger weight, large occupied space and high manufacturing cost.

2. The support bearing of input adopts the gasket location, and the bearing easily forms axial float at the operation in-process, causes the temperature rise, and bearing life is short.

3. The input gear shaft is large in size, difficult to mold and process and high in assembly difficulty.

4. The final-stage sun gear has a complex positioning structure and a large space occupancy rate.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tower crane is planetary reducer for crane guarantees the reliability of moment of torsion output, promotes planetary reducer's transmission effect, effectively improves planetary reducer inner structure's compactedness, reduces weight, and the integral key shaft sets up with one-level sun gear components of a whole that can function independently, reduces the machine-shaping degree of difficulty, easily assembles the combination.

In order to achieve the purpose, the utility model adopts the technical proposal that:

tower crane is planetary reducer for machine includes the drive shaft of being connected with the motor, with drive shaft splined connection integral key shaft, with integral key shaft splined connection's one-level planetary drive, with one-level planetary drive splined connection's second grade planetary drive and with second grade planetary drive splined connection's tertiary planetary drive, its characterized in that: the inner gear rings in all stages of planetary transmission are fixed in sequence, the inner gear rings in three stages of planetary transmission are coaxially fixed with a winding drum support for mounting a winding drum, the winding drum support is supported on a planet carrier of the three stages of planetary transmission through a cylindrical roller bearing, the planet carrier of the three stages of planetary transmission is a squirrel-cage planet carrier, and the planet carrier of the first stage planetary transmission and the planet carrier of the second stage planetary transmission are both single-arm planet carriers.

Preferably, the primary planetary transmission comprises a primary sun gear in splined connection with a spline shaft, a primary planet gear meshed with the primary sun gear, a primary planet carrier connected with the primary planet gear and in a single-arm type, and a primary inner gear ring meshed with the primary planet gear, the secondary planetary transmission comprises a secondary sun gear in splined connection with the primary planet carrier, a secondary planet gear meshed with the secondary sun gear, a secondary planet carrier connected with the secondary planet gear and in a single-arm type, and a secondary inner gear ring meshed with the secondary planet gear, the tertiary planetary transmission comprises a tertiary sun gear in splined connection with the secondary planet carrier, a tertiary planet gear meshed with the tertiary sun gear, a tertiary planet carrier connected with the tertiary planet carrier and in a squirrel cage type, and a tertiary inner gear ring meshed with the tertiary planet carrier, the primary inner gear ring and the secondary inner gear ring are coaxially and fixedly connected, the secondary inner gear ring and the tertiary inner gear ring are coaxially and fixedly connected through an intermediate flange, the reel support is coaxially fixed with the inner gear ring through a bolt, and the reel support is sleeved on the periphery of the tertiary planet carrier and supported on the cylindrical roller bearing.

Preferably, the driving shaft is provided with two support bearings in a press fit mode, the support bearings are arranged in the bearing seats in a press fit mode, the inner ends of the bearing seats are fixed with the three-stage planet carrier through bolts, and the support bearings are axially spaced.

Preferably, the support bearings are respectively an inner support bearing abutted against the inner end face of the bearing seat and an outer support bearing arranged outside the inner support bearing, the driving shaft is provided with an inner shaft shoulder abutted against the end face of the inner support bearing and an outer shaft shoulder abutted against the end face of the outer support bearing, the inner support bearing is axially positioned between the inner end face of the bearing seat and the inner shaft shoulder, the outer end of the bearing seat is coaxially fixed with a bearing gland radially separated from the driving shaft, a compression spring is arranged in the bearing gland, the inner end face of the outer support bearing is abutted against the outer shaft shoulder, and the outer end face is compressed by the compression spring.

Preferably, tertiary sun gear cover establish outside the integral key shaft, one-level sun gear rear side have with the coaxial fixed rear end cap of tertiary ring gear, pressure equipment location bearing in the rear end cap, tertiary sun gear, second grade sun gear and one-level sun gear lean on to the back by preceding in proper order along the axial, and the positive front end of tertiary sun gear offsets with the wear ring in the tertiary planet carrier, the rear end and the location bearing inner circle terminal surface of one-level sun gear offset.

Preferably, the spline shaft is clamped with two clamp springs, one clamp spring abuts against the inner end face of the primary sun gear, the other clamp spring abuts against the outer end face of the primary sun gear, and the primary sun gear is axially positioned on the spline shaft.

The utility model has the advantages that:

1. the utility model discloses a tower crane is planetary reducer for hoist, planetary drive's ring gear at different levels is fixed in proper order, ring gear moment of torsion in the tertiary planet transmission is the biggest, the reel support is coaxial fixed with ring gear in the tertiary planet transmission, obtain big moment of torsion, the reel synchronous rotation of dress on the reel support, realize the output of power, satisfy tower crane jack-up's big moment of torsion demand, the reel support passes through cylindrical roller bearing and supports on tertiary planetary drive's planet carrier, cylindrical roller bearing radial bearing capacity is high, be difficult to produce the deformation in the bearing process, long service life, the life cycle of extension planetary reducer, planet carrier in the tertiary planet transmission is squirrel cage type planet carrier, structural strength is higher, and the planet axle in the squirrel cage type planet carrier can bear bigger moment of torsion, non-deformable, effectively guarantee the reliability of dress at epaxial planet wheel of planet and ring gear meshing connection, guarantee torque output's reliability, thereby promote planetary reducer's transmission effect, transmission validity and reliability are improved. The planet carriers in the primary planetary transmission and the secondary planetary transmission are both single-arm planet carriers, so that the space volume and the weight of the planet carriers are effectively reduced, and the weight and the volume of the planetary speed reducer are reduced.

2. The outer support bearing on the driving shaft is axially positioned through the outer shaft shoulder and the compression spring, and the axial movement of the outer support bearing is buffered through the compression spring, so that the axial movement of the outer support bearing is slowed down, the temperature rise of the outer support bearing caused by movement friction is reduced, the service life of the outer support bearing is prolonged, and the maintenance frequency is reduced.

3. Tertiary sun gear, second grade sun gear and one-level sun gear lean on to the back by preceding in proper order along the axial to carry out axial positioning through wear-resisting ring and location bearing, prevent the axial float of three sun gear, location structure is simple, and the space occupancy is little, effectively improves the compactedness of planetary reducer inner structure, one-level sun gear rear end with through the location bearing location, guarantee one-level sun gear and integral key shaft splined connection's stability, tertiary sun gear passes through wear-resisting ring location, improves wear-resisting life.

4. The spline shaft and the first-stage sun gear are arranged in a split mode, the first-stage sun gear is axially positioned on the spline shaft through the clamp spring, the size of the spline shaft is reduced, the machining forming difficulty is reduced, and the spline shaft and the first-stage sun gear are simple in assembling structure and easy to assemble and combine.

Drawings

Fig. 1 is a schematic diagram of a planetary reducer for a tower crane in a specific embodiment.

Fig. 2 is a partially enlarged schematic view of fig. 1.

Fig. 3 is another partially enlarged view of fig. 1.

Fig. 4 is a schematic diagram of the axial positioning of the primary sun gear and the spline shaft by the snap spring.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to fig. 1 to 4.

Tower crane is with planetary reducer, include drive shaft 1 be connected with the motor, with 1 splined connection integral key shaft 2 of drive shaft, with 2 splined connection's of integral key shaft one-level planetary drive 3, with 3 splined connection's of one-level planetary drive second grade planetary drive 4 and with 4 splined connection's of second grade planetary drive tertiary planetary drive 5, its characterized in that: inner gear rings in all levels of planetary transmission are fixed in sequence, a winding drum support 6 for mounting a winding drum is coaxially fixed on the inner gear ring in the three levels of planetary transmission 5, the winding drum support 6 is supported on a planet carrier of the three levels of planetary transmission 5 through a cylindrical roller bearing 7, the planet carrier in the three levels of planetary transmission 5 is a squirrel cage type planet carrier, and the planet carriers in the primary planetary transmission 3 and the secondary planetary transmission 4 are single-arm type planet carriers.

The planetary reducer for the tower crane is characterized in that inner gear rings of all levels of planetary transmissions are sequentially fixed, the torque of the inner gear rings in the three levels of planetary transmissions is the largest, the reel support 6 and the inner gear rings in the three levels of planetary transmissions are coaxially fixed to obtain large torque, reels mounted on the reel support synchronously rotate to achieve power output and meet the requirement of the tower crane for large torque, the reel support 6 is supported on a planet carrier of the three levels of planetary transmissions 5 through the cylindrical roller bearing 7, the cylindrical roller bearing 7 is high in radial bearing capacity and not prone to deformation in a bearing process, the service life is long, the service life of the planetary reducer is prolonged, the planet carrier in the three levels of planetary transmissions 5 is a squirrel-cage planet carrier, the structural strength is higher, a planet shaft in the squirrel-cage planet carrier can bear larger torque and is not prone to deformation, the reliability of meshing connection between the planet gears mounted on the planet shaft and the inner gear rings is effectively guaranteed, and the reliability of torque output is guaranteed, so that the transmission effect of the planetary reducer is improved, and the transmission effectiveness and reliability are improved. Because the torque of the inner gear rings in the primary planetary gear 3 and the secondary planetary gear 4 is relatively small, namely the torque of the planetary gears in the primary planetary gear 3 and the secondary planetary gear 4 is small, the planet carriers in the primary planetary gear 3 and the secondary planetary gear 4 are single-arm planet carriers, the support requirement of the planetary gears can be met, the space volume and the weight of the planet carriers are effectively reduced, and the weight and the volume of the planetary reducer are reduced.

The primary planetary transmission 3 comprises a primary sun gear 31 in splined connection with the spline shaft 2, a primary planet gear 32 meshed with the primary sun gear 31, a primary planet carrier 33 connected with the primary planet gear 32 and in a single-arm shape, and a primary inner gear ring 34 meshed with the primary planet gear 32, the secondary planetary transmission 4 comprises a secondary sun gear 41 in splined connection with the primary planet carrier 33, a secondary planet gear 42 meshed with the secondary sun gear 41, a secondary planet carrier 43 connected with the secondary planet gear 42 and in a single-arm shape, and a secondary inner gear ring 44 meshed with the secondary planet gear 42, the tertiary planetary transmission 5 comprises a tertiary sun gear 51 in splined connection with the secondary planet carrier 43, a tertiary planet gear 52 meshed with the tertiary planet gear 51, a tertiary planet carrier 53 connected with the tertiary planet gear 52 and in a squirrel-cage shape, and a tertiary inner gear ring 54 meshed with the tertiary planet carrier 52, the primary inner gear ring 34 and the secondary inner gear ring 44 are coaxially and fixedly connected, the secondary inner gear ring 44 and the tertiary inner gear ring 54 are coaxially and fixedly connected through an intermediate flange, the drum support 6 is coaxially fixed with the tertiary inner gear ring 54 through bolts, and the drum support 6 is sleeved on the tertiary roller 53 through the cylindrical bearing 6. The first-stage inner gear ring 34, the second-stage inner gear ring 44 and the third-stage inner gear ring 54 are coaxially and fixedly connected into a whole, the torque superposition enables the torque of the third-stage inner gear ring 51 to be maximum, the reel support 6 and the third-stage inner gear ring 54 are coaxially fixed to obtain large torque, and a reel arranged on the reel support 6 synchronously rotates to meet the large torque requirement of tower crane lifting. The cylindrical roller bearing 6 has strong radial supporting capability, and the structural stability of the three-stage planet carrier 53 is ensured while the drum support 6 is effectively supported.

The driving shaft 1 is provided with two support bearings 9 in a press-fitting manner, the support bearings 9 are press-fitted in the bearing seats 10, the inner ends of the bearing seats 10 are fixed with the three-stage planet carrier 53 through bolts, and the support bearings 9 are axially spaced. The third-stage planet carrier 53 is fixed with the bearing seat 10 and does not rotate in the running process of the planetary reducer, the third-stage inner gear ring 54 drives the drum support 6 to rotate, and the two support bearings 6 form radial support for the third-stage planet carrier 53 and enable the driving shaft 1 to be not inclined in the axial direction.

The support bearing 9 is an inner support bearing 91 abutting against the inner end face of the bearing seat 10 and an outer support bearing 92 arranged outside the inner support bearing 91, the drive shaft 1 is provided with an inner shoulder 101 abutting against the end face of the inner support bearing 91 and an outer shoulder 102 abutting against the end face of the outer support bearing 92, the inner support bearing 91 is axially positioned between the inner end face of the bearing seat 10 and the inner shoulder 101, the outer end of the bearing seat 10 is coaxially fixed with a bearing gland 11 radially spaced from the drive shaft 1, a compression spring 12 is arranged in the bearing gland 11, the inner end face of the outer support bearing 92 abuts against the outer shoulder 101, and the outer end face is compressed by the compression spring 12. Because the inner end of the bearing seat 10 is fixed with the third-stage planet carrier 53, the inner support bearing 91 is axially positioned between the inner end surface of the support seat 10 and the inner shaft shoulder 101, the axial positioning stability of the inner support bearing 91 is high, the outer end of the bearing seat 10 is only radially supported by the outer support bearing 92 and is not fixed, the outer support bearing 92 is easy to axially float, the outer support bearing 92 is clamped between the outer shaft shoulder 102 and the compression spring 12 to form axial positioning, the axial float of the outer support bearing 92 is buffered through the compression spring 12, the axial float of the outer support bearing 92 is slowed down, the temperature rise of the outer support bearing 92 caused by float friction is reduced, the service life of the outer support bearing 92 is prolonged, and the maintenance frequency is reduced.

The three-stage sun gear 51 is sleeved outside the spline shaft 2, the rear side of the first-stage sun gear 31 is provided with a rear end cover 35 coaxially fixed with the three-stage inner gear ring 34, the positioning bearing 13 is pressed in the rear end cover 35, the three-stage sun gear 51, the second-stage sun gear 41 and the first-stage sun gear 31 are sequentially abutted from front to back along the axial direction, the front end of the third-stage sun gear 51 abuts against a wear-resistant ring 14 in the third-stage planet carrier 53, and the rear end of the first-stage sun gear 31 abuts against the end face of an inner ring of the positioning bearing 13. Tertiary sun gear 51, second grade sun gear 41 and one-level sun gear 31 lean on by preceding to back in proper order along the axial, and carry out axial positioning through wear-resisting ring 14 and positioning bearing 13, prevent three sun gear 31's axial float, location structure is simple, space occupancy is little, effectively improve the compactness of planetary reducer inner structure, one-level sun gear 31 rear end with fix a position through positioning bearing 13, guarantee one-level sun gear 31 and 2 splined shaft's of integral key shaft stability of splined connection, tertiary sun gear 51 passes through wear-resisting ring 14 location, and the wear-resisting life is prolonged.

Two snap springs 15 are clamped on the spline shaft 2, one snap spring 15 abuts against the inner end face of the primary sun gear 51, the other snap spring 15 abuts against the outer end face of the primary sun gear 51, and the primary sun gear 51 is axially positioned on the spline shaft 2. The spline shaft 2 and the first-stage sun gear 51 are arranged in a split mode, the first-stage sun gear 51 is axially positioned on the spline shaft 2 through the clamp spring 15, the size of the spline shaft 2 is reduced, the machining forming difficulty is reduced, and the spline shaft 2 and the first-stage sun gear 51 are simple in assembly structure and easy to assemble and combine.

The technical solutions of the embodiments of the present invention are completely described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Claims (6)

1. Tower crane is planetary reducer for machine includes the drive shaft of being connected with the motor, with drive shaft splined connection integral key shaft, with integral key shaft splined connection's one-level planetary drive, with one-level planetary drive splined connection's second grade planetary drive and with second grade planetary drive splined connection's tertiary planetary drive, its characterized in that: the inner gear rings in all levels of planetary transmissions are fixed in sequence, the inner gear rings in all levels of planetary transmissions are coaxially fixed with a winding drum support for mounting a winding drum, the winding drum support is supported on a planet carrier of the three levels of planetary transmissions through a cylindrical roller bearing, the planet carrier of the three levels of planetary transmissions is a squirrel cage type planet carrier, and the planet carriers of the primary planetary transmission and the secondary planetary transmissions are single-arm type planet carriers.

2. The planetary reducer for the tower crane according to claim 1, wherein: the primary planetary transmission comprises a primary planet gear which is in splined connection with a spline shaft, a primary planet gear which is meshed with the primary sun gear, a primary planet carrier which is connected with the primary planet gear and is in a single-arm type, and a primary inner gear ring which is meshed with the primary planet gear, the secondary planetary transmission comprises a secondary sun gear which is in splined connection with the primary planet carrier, a secondary planet gear which is meshed with the secondary sun gear, a secondary planet carrier which is connected with the secondary planet gear and is in a single-arm type, and a secondary inner gear ring which is meshed with the secondary planet gear, the tertiary planet carrier which is connected with the tertiary planet gear and is in a squirrel-cage type, and a tertiary inner gear ring which is meshed with the tertiary planet carrier, the primary inner gear ring and the secondary inner gear ring are coaxially and fixedly connected, the secondary inner gear ring and the tertiary inner gear ring are coaxially and fixedly connected through an intermediate flange, a reel support is coaxially fixed with the tertiary inner gear ring through a bolt, and the reel support is sleeved on the periphery of the tertiary planet carrier and supported on the tertiary planet carrier through a cylindrical roller bearing.

3. The planetary reducer for the tower crane according to claim 2, wherein: the driving shaft is provided with two support bearings in a press fit mode, the support bearings are arranged in the bearing seats in a press fit mode, the inner ends of the bearing seats are fixed with the three-stage planet carrier through bolts, and the support bearings are axially spaced.

4. The planetary reducer for the tower crane according to claim 3, wherein: the supporting bearings are respectively an inner supporting bearing abutted against the inner end face of the bearing seat and an outer supporting bearing arranged outside the inner supporting bearing, an inner shaft shoulder abutted against the end face of the inner supporting bearing and an outer shaft shoulder abutted against the end face of the outer supporting bearing are arranged on the driving shaft, the inner supporting bearing is axially positioned between the inner end face of the bearing seat and the inner shaft shoulder, a bearing gland radially separated from the driving shaft is coaxially fixed at the outer end of the bearing seat, a compression spring is arranged in the bearing gland, the inner end face of the outer supporting bearing is abutted against the outer shaft shoulder, and the outer end face is compressed by the compression spring.

5. The planetary reducer for the tower crane according to claim 2, wherein: tertiary sun gear cover establish outside the integral key shaft, one-level sun gear rear side have with the coaxial fixed rear end cap of tertiary ring gear, pressure equipment fixing bearing in the rear end cap, tertiary sun gear, second grade sun gear and one-level sun gear lean on by preceding to back in proper order along the axial, and the positive front end of tertiary sun gear offsets with the wear ring in the tertiary planet carrier, the rear end and the fixing bearing inner race terminal surface of one-level sun gear offset.

6. The planetary reducer for the tower crane according to claim 2, wherein: and two clamp springs are clamped on the spline shaft, one clamp spring is abutted against the inner end face of the primary sun gear, the other clamp spring is abutted against the outer end face of the primary sun gear, and the primary sun gear is axially positioned on the spline shaft.

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