CN213870113U - Large-eccentricity low-speed large-torque line hydraulic motor - Google Patents

Abstract

A large-eccentricity low-speed large-torque-line hydraulic motor comprises a body shell, wherein an output shaft structure for torque output and a cycloidal pin gear pair fixedly connected with the body shell through a bolt are arranged in the body shell; the cycloidal pin wheel pair comprises a stator fixedly connected with the body shell, a plurality of pin teeth uniformly arranged on the inner surface of the stator and a rotor arranged in the stator in a free rotating mode; the interior of the rotor is connected with a main linkage shaft and a flow distribution linkage shaft through splines; an eccentricity exists between the stator and the rotor, and the eccentricity is set to be 5 mm; the purpose of increasing the displacement and the torque is achieved by increasing the eccentricity.

Description

Large-eccentricity low-speed large-torque line hydraulic motor

The technical field is as follows:

the utility model relates to a hydraulic pressure technical equipment field, the more specifically big torque line hydraulic motor of big eccentric low-speed that says so.

Background art:

at present, the maximum displacement of a cycloid hydraulic motor in the global range is about 1000cc/r, the displacement of a known cycloid hydraulic motor is small, and equipment needing large torque cannot achieve the torque needed by equipment connected with the motor due to the small displacement and small torque of the cycloid hydraulic motor matched with the equipment, so that the selection range is influenced, and the normal matching of the equipment is influenced.

In order to overcome the problem of small torque of the existing cycloid hydraulic motor, the best way is to improve the displacement of the cycloid hydraulic motor. Sometimes, however, the overall dimensions of the motor are affected by the connecting device and cannot be changed. In addition, the height of the rotor is limited sometimes, and too large height can limit the bearing capacity of the linkage shaft of the cycloid hydraulic motor or exceed the bearing capacity of the output shaft of the cycloid hydraulic motor, so that the linkage shaft and the output shaft of the cycloid hydraulic motor cannot bear too large torque.

The invention content is as follows:

for solving the problem, overcome prior art not enough, the utility model provides a need not change big eccentric low-speed big torque line hydraulic motor who improves discharge capacity, increase moment of torsion under the prerequisite of cycloid hydraulic motor overall dimension and stator-rotor pair height.

In order to achieve the purpose, the utility model provides a large eccentric low-speed large torque line hydraulic motor, which comprises a body shell, wherein an output shaft structure for torque output and a cycloidal pin wheel pair fixedly connected with the body shell through a bolt are arranged inside the body shell;

the cycloidal pin wheel pair comprises a stator fixedly connected with the body shell, a plurality of pin teeth uniformly arranged on the inner surface of the stator and a rotor arranged in the stator in a free rotating mode; the interior of the rotor is connected with a main linkage shaft and a flow distribution linkage shaft through splines;

an eccentricity exists between the stator and the rotor, and the eccentricity is set to be 5 mm.

Further, the number of the plurality of needle teeth is set to be 9.

Further, the number of teeth of the rotor is set to 8.

Furthermore, the output shaft structure comprises an output shaft and a bearing, one end of the output shaft extends out of the body shell, and the other end of the output shaft is arranged in the body shell and connected with the main linkage shaft through a spline; the bearing is disposed between the output shaft and the body housing.

Furthermore, the other end of the flow distribution linkage shaft is provided with a flow distribution pressure plate, and the middle part of the flow distribution pressure plate is provided with a limiting column used for abutting against the flow distribution linkage shaft.

The utility model has the advantages that:

the utility model relates to a big eccentric low-speed big torque line hydraulic motor has reached the purpose of increase discharge capacity and moment of torsion through the mode of increase eccentricity under the prerequisite that does not change overall dimension and universal driving shaft and output shaft bearing capacity. The eccentricity reaches 5mm, the device has the characteristics of low starting pressure, high efficiency and stable low-speed operation, the maximum discharge capacity can reach 3000cc/r, and the maximum torque can reach more than 6000 Nm.

Description of the drawings:

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic sectional structure of the present invention;

in the drawings: 1. the device comprises an output shaft, 2, a dustproof ring, 3, a shaft seal, 4, a body shell, 5, a bearing, 6, a first O-shaped ring, 7, a stator, 8, needle teeth, 9, a second O-shaped ring, 10, a limiting column, 11, a flow distribution pressure plate, 12, a flow distribution linkage shaft, 13, a rotor, 14 and a main linkage shaft.

The specific implementation mode is as follows:

for making the purpose, technical scheme and advantage of the utility model implementation clearer, will combine below the utility model discloses an attached 1~ attached 2 of the utility model is right the utility model discloses carry out more detailed description.

The utility model provides a large eccentric low-speed large torque line hydraulic motor, which comprises a body shell 4, wherein an output shaft structure for torque output and a cycloidal pin gear pair fixedly connected with the body shell 4 through a bolt are arranged in the body shell 4;

the cycloidal pin wheel pair comprises a stator 7 fixedly connected with the body shell 4, a plurality of pin teeth 8 uniformly arranged on the inner surface of the stator 7 and a rotor 13 arranged in the stator 7 in a free rotating mode; a main linkage shaft 14 and a flow distribution linkage shaft 12 are connected to the inside of the rotor 13 through splines; an eccentricity exists between the stator 7 and the rotor 13, and the eccentricity is set to be 5 mm; the number of the plurality of needle teeth 8 is set to be 9; the number of teeth of the rotor 13 is set to 8; the output shaft structure comprises an output shaft 1 and a bearing 5, one end of the output shaft 1 extends out of the body shell 4, and the other end of the output shaft 1 is arranged in the body shell 4 and connected with the main linkage shaft 14 through a spline; the bearing 5 is arranged between the output shaft 1 and the body housing 4; the other end of the flow distribution linkage shaft 12 is provided with a flow distribution pressure plate 11, and the middle part of the flow distribution pressure plate 11 is provided with a limiting column 10 used for abutting against the flow distribution linkage shaft 12.

The utility model discloses a one of them embodiment as follows:

as shown in fig. 1, the present invention has an eccentricity e between the rotor 13 having 8 teeth and the stator 7 having 9 pins 8. The difference of the number of teeth of the rotor 13 and the stator 7 is 1, and all the teeth or needle teeth 8 of the rotor 13 and the stator 7 can be meshed into 9 independent sealed cavities with variable volumes. The inclined oil ports of the oil distribution disc and the compensation disc are respectively communicated with the oil inlet and the oil outlet, 16 groups of inclined holes which are uniformly arranged at intervals are arranged on the oil distribution disc, and 8 inclined holes are arranged in each group; one group is communicated with the oil inlet, and the other group is communicated with the oil return port. The inclined holes are respectively communicated with the tooth bottoms of the stators 7 through corresponding 9 holes of the partition plate, namely respectively communicated with 9 sealed cavities.

The inclined oil holes on the oil distribution disc play a role in distributing flow, so that nearly half of the 9 sealed cavities are communicated with the high-pressure oil path, and the rest are communicated with the low-pressure oil path. When pressure oil is input through the oil inlet, the sealed cavity enters high-pressure oil, and the rotor 13 rotates in the direction of increasing the volume between the teeth of the high-pressure cavity under the action of the oil pressure. Since the stator 7 is stationary, the rotor 13 rotates at a low speed around its axis, and the center of the rotor 13 revolves in a high speed and reverse direction around the center of the stator 7.

When the rotor 13 revolves, i.e. the rotor 13 rolls along the stator 7, the oil suction cavity and the oil pressing cavity are continuously changed, but are always divided into two cavities by taking the center line as a boundary, the increased volume of the tooth space on one side is the high pressure cavity, and the reduced volume of the tooth space on the other side is the oil discharge cavity.

And the revolution is performed for one time, and one time of entering and exiting circulation is completed between every two teeth. When the rotor 13 revolves one revolution relative to the center of the stator 7, the rotor 13 rotates 1/8 in the opposite direction, and seven sealed cavities in the motor respectively complete one cycle from low pressure → high pressure → low pressure. Therefore, when the rotor 13 rotates for one full revolution, the nine chambers complete eight cycles, and the total volume of 9x8=72 high-pressure sealed chambers is obtained.

Therefore, the rotor 13 revolves 8 times, namely rotates one time, the main linkage shaft 14 transmits the rotation motion of the rotor 13 to the output shaft 1, and the working mechanism can be dragged to rotate. Due to the continuous flow distribution of the oil distribution disc, the high-pressure cavity synchronously rotates along with the rotation of the connecting line. If the direction of oil inlet and outlet of the motor is changed, the rotation direction of the motor output shaft 1 is changed accordingly.

The utility model provides a big eccentric low-speed big torque line hydraulic motor is under the condition that does not change cycloid hydraulic motor appearance and the 13 vice heights of stator and rotor, realizes the technological effect of increase motor discharge capacity through the 13 vice appearance chambeies volumes of the inside stator and rotor of increase cycloid hydraulic motor.

The utility model discloses a mode of increase eccentricity increases the vice appearance chamber volume of deciding rotor 13, and because of rotor 13 rotation is whole to be changeed, eight circulations are accomplished to nine appearance chambeies, can get up totally and can obtain 9x8=72 high-pressure seal volume of holding, and the sealed volume of holding of the increase multiplies 72 and is the discharge capacity of hydraulic motor increase promptly. The mode can realize the technical effect of maximizing the lifting displacement on the basis of carrying out minimum improvement on the structure, simultaneously, the increase of the displacement enables the large eccentric low-speed large torque line hydraulic motor to have larger torque, and the risk that the linkage shaft and the output shaft 1 of the cycloid hydraulic motor are deformed and damaged due to the increase of the height of the rotor 13 is avoided.

The utility model provides an among the big torque line hydraulic motor of big eccentric low-speed, the eccentricity between stator 7 and the rotor 13 sets up to 5 millimeters.

The body shell 4 of the motor is provided with a positioning spigot during use, an output shaft 1 for outputting torque is arranged in the body shell 4, a shaft shoulder protruding in the middle is arranged at the rear end of the output shaft 1, and a bearing 5 is respectively arranged and limited in the front and at the rear of the shaft shoulder.

In a further embodiment, the front and rear supporting bearings 5 mounted on the output shaft 1 are cylindrical roller bearings 5, each cylindrical roller bearing 5 is composed of a cylindrical roller and a supporting frame, the cylindrical rollers are mounted in grooves of the supporting frames machined through the machining, the cylindrical roller bearings 5 can bear radial force and axial force, shaft shoulders of the output shaft 1 lean against the cylindrical rollers, the axial force borne by the output shaft 1 is transmitted to the body shell 4 through the cylindrical rollers, a raceway of each cylindrical roller has proper hardness, and the cylindrical roller bearings 5 can also bear large axial force.

The flow distribution pressure plate 11 is used for distributing high-pressure oil at an oil inlet and low-pressure oil at an oil return opening of the motor, the distributed high-pressure and low-pressure oil respectively enters a channel of the flow distribution plate, the channel of the flow distribution plate and a pore channel of the flow distribution support plate jointly form a flow distribution system, and the high-pressure and low-pressure oil enters a sealed cavity formed by the stator 7, the rotor 13 and the needle teeth 8 after being distributed by the flow distribution system, so that the rotor 13 is continuously pushed to move;

the internal high pressure needs to be supplemented with firm and stable sealing, a sealing system mainly comprises a dustproof ring 2, a shaft seal 3, a first O-shaped ring 6 and a second O-shaped ring 9, the first O-shaped ring 6 and the second O-shaped ring 9 are positioned on two sides of a stator-rotor 13 pair and form sealing with a body shell 4, the dustproof ring 2 and the shaft seal 3 are positioned between an output shaft 1 and the body shell 4, and the dustproof ring 2 is positioned on the outer side to prevent dust and liquid from entering the motor; the shaft seal 3 serves on the one hand for sealing and on the other hand for stabilizing the output shaft 1. Meanwhile, a plurality of O-shaped rings for sealing are arranged at a plurality of positions in the large-eccentricity low-speed large-torque-line hydraulic motor and are respectively positioned between the flow distribution pressure plate 11 and the body shell 4 and at the contact gaps between the body shell 4 and the outside.

The output position of the torque of the rotor 13 is the meshing position of the external splines of the main linkage shaft 14 and the flow distribution linkage shaft 12 and the internal spline of the rotor 13 of the cycloidal pin gear pair and is positioned in the middle of the rotor 13.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A large-eccentricity low-speed large-torque-line hydraulic motor comprises a body shell (4), wherein an output shaft structure for torque output and a cycloidal pin gear pair fixedly connected with the body shell (4) through a bolt are arranged in the body shell (4); the method is characterized in that:

the cycloidal pin wheel pair comprises a stator (7) fixedly connected with the body shell (4), a plurality of pin teeth (8) uniformly arranged on the inner surface of the stator (7) and a rotor (13) arranged in the stator (7) in a free rotating mode; the interior of the rotor (13) is connected with a main linkage shaft (14) and a flow distribution linkage shaft (12) through splines;

an eccentricity exists between the stator (7) and the rotor (13), and the eccentricity is set to be 5 mm.

2. The large eccentric low speed large torque wire hydraulic motor according to claim 1, wherein: the number of the plurality of needle teeth (8) is set to be 9.

3. The large eccentric low speed large torque wire hydraulic motor according to claim 1, wherein: the number of teeth of the rotor (13) is set to be 8.

4. The large eccentric low speed large torque wire hydraulic motor according to claim 1, wherein: the output shaft structure comprises an output shaft (1) and a bearing (5), one end of the output shaft (1) extends out of the body shell (4), and the other end of the output shaft (1) is arranged in the body shell (4) and connected with the main linkage shaft (14) through a spline; the bearing (5) is arranged between the output shaft (1) and the body shell (4).

5. The large eccentric low speed large torque wire hydraulic motor according to claim 1, wherein: the other end of the flow distribution linkage shaft (12) is provided with a flow distribution pressure plate (11), and the middle part of the flow distribution pressure plate (11) is provided with a limiting column (10) used for abutting against the flow distribution linkage shaft (12).

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