CN219327588U

CN219327588U - Cycloidal pin gear hydraulic motor

Info

Publication number: CN219327588U
Application number: CN202223181056.0U
Authority: CN
Inventors: 张冲; 潘骏; 焦文瑞; 李佳伟
Original assignee: Zhenjiang Hydraulics Co ltd
Current assignee: Zhenjiang Hydraulics Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-07-11
Anticipated expiration: 2032-11-29

Abstract

The utility model relates to a cycloidal pin gear hydraulic motor, and belongs to the technical field of hydraulic transmission devices. The hydraulic motor comprises an output shaft supported on the shell, a cycloidal pin gear stator fixedly connected with the shell through a separation disc, and a rear cover fixedly connected with the cycloidal pin gear stator; the inner end of the output shaft is meshed with the outer teeth at one end of the linkage shaft through the inner spline of the output shaft, the outer teeth at the other end of the linkage shaft are meshed with the inner spline of the cycloidal pin wheel rotor, and the cycloidal pin wheel rotor and the cycloidal pin wheel stator form a cycloidal pin wheel pair; the inner hole of the cycloidal pin gear rotor is provided with an inner spline section adjacent to the separation disc and an expanding hole section adjacent to the rear cover, and a groove clamped into the elastic clamp spring is formed near the end part of the inner spline section adjacent to the rear cover. After the structure of the utility model is adopted, when the axial length of the cycloidal pin wheel pair is changed by changing the displacement of the cycloidal pin wheel hydraulic motor, the universal linkage shaft can be adopted as long as the axial structural size of the internal spline of the cycloidal pin wheel rotor is kept unchanged, thereby facilitating the manufacture and the management and saving the cost.

Description

Cycloidal pin gear hydraulic motor

Technical Field

The utility model relates to a hydraulic motor, in particular to a cycloidal pin gear hydraulic motor, and belongs to the technical field of hydraulic transmission devices.

Background

The cycloidal pin gear hydraulic motor is widely applied, a typical structure of the cycloidal pin gear hydraulic motor can be seen in Chinese patent literature with the application number of 201721096122.0, the cycloidal pin gear hydraulic motor comprises an output shaft and a shell, a controller is arranged on one side of a heating block, a limit pad is arranged on one side of a gear coupling, a limit column is arranged on the other side of the gear coupling, a temperature sensor is arranged at the bottom end of an encoder, a dust ring is arranged at the top end of a front cover, a thrust retainer ring is arranged on one side of an X-shaped sealing ring, an o-shaped sealing ring is arranged at the bottom end of the thrust retainer ring, a stator is arranged on one side of an oil distribution disc, and a rear cover is arranged on one side of the stator.

In practical application, the axial length of the stator and rotor pair is changed to correspondingly change the displacement, so that hydraulic motors with different specifications are formed. In the prior art, the limit post is adopted to restrict the axial position of the linkage shaft, so that when the axial length of the stator and rotor pair is changed, the linkage shafts with different lengths are required to be configured, and the problem is caused.

Disclosure of Invention

The utility model aims at: aiming at the defects existing in the prior art, through structural improvement, a cycloidal pin gear hydraulic motor with universal linkage shafts can be used for different specifications of hydraulic motors.

In order to achieve the above purpose, the basic technical scheme of the cycloidal pin gear hydraulic motor of the utility model is as follows: the cycloidal pin gear comprises an output shaft supported on a shell, a cycloidal pin gear stator fixedly connected with the shell through a separation disc, and a rear cover fixedly connected with the cycloidal pin gear stator;

the inner end of the output shaft is meshed with the outer teeth at one end of the linkage shaft through an internal spline of the output shaft, the outer teeth at the other end of the linkage shaft are meshed with the internal spline of the cycloidal pin wheel rotor, and the cycloidal pin wheel rotor and the cycloidal pin wheel stator form a cycloidal pin wheel pair;

the inner hole of the cycloidal pin gear rotor is provided with an inner spline section adjacent to the separation disc and an expanding hole section adjacent to the rear cover, and a groove clamped in the elastic clamp spring is formed near the end part of the inner spline section adjacent to the rear cover.

The utility model is further perfected that the elastic clamp spring is a C-shaped clamp spring made of a spring steel wire.

The utility model is further perfected in that the groove is provided with an arc bottom matched with the section of the elastic snap spring.

The utility model is further perfected that the depth of the groove is larger than the depth of the internal spline teeth of the cycloidal pin gear rotor, so that the full-height limit can be formed on the external teeth of the linkage shaft, and the limit is more stable.

It can be understood that after the structure of the utility model is adopted, when the axial length of the cycloidal pin wheel pair is changed by changing the displacement of the cycloidal pin wheel hydraulic motor, the universal linkage shaft can be adopted as long as the axial structural dimension of the internal spline of the cycloidal pin wheel rotor is kept unchanged, thereby greatly facilitating the manufacture and the management and saving the cost.

Drawings

Fig. 1 is a schematic diagram of the structure of an embodiment of the present utility model.

Fig. 2 is a schematic view of the cycloidal pin gear rotor of the embodiment of fig. 1.

Fig. 3 is a schematic view of the cross-sectional B-B structure of fig. 2.

Fig. 4 is a schematic view of the structure of the elastic snap spring in fig. 2.

Detailed Description

Example 1

As shown in fig. 1, the cycloidal pin gear hydraulic motor of the valve body of the present embodiment includes an output shaft 1 supported by a housing 2, a cycloidal pin gear stator 5 fixedly connected to the housing 1 through a spacer 4, and a rear cover 7 fixedly connected to the cycloidal pin gear stator 5. The inner end of the output shaft 1 is meshed with the outer teeth at one end of the linkage shaft 3 through an inner spline, the outer teeth at the other end of the linkage shaft 3 are meshed with the inner spline of the cycloid pin wheel rotor 6, and the cycloid pin wheel rotor 6 is meshed with the cycloid pin wheel stator 5 to form a cycloid pin wheel pair.

The inner hole of the cycloidal pin gear rotor 6 is provided with an inner spline section 6-1 adjacent to the separation disc 4 and an expanding hole section 6-3 adjacent to the rear cover 7, an arc bottom groove 6-2 with depth larger than that of the inner spline teeth is formed near the end part of the inner spline section 6-1 adjacent to the rear cover 7, and the arc bottom groove 6-2 is internally clamped into a C-shaped elastic clamp spring 8 shown in fig. 3, so that the axial limiting effect of the linkage shaft 3 is achieved.

Compared with the prior art, the embodiment has the following advantages:

1. when the rotor is matched with the motor with each displacement, only one universal linkage shaft with one length is needed, so that the processing and management cost of the linkage shaft is effectively reduced;

2. the cycloidal pin gear rotor only needs to process the internal spline with limited length, and does not need to process the internal spline with all axial length, so that the manufacturing cost is saved;

3. the C-shaped clamp spring made of the spring steel wire replaces the limit column, so that not only is the cost saved, but also the limit column with various specifications is omitted by only using one clamp spring.

In addition to the embodiments described above, other embodiments of the utility model are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the utility model.

Claims

1. A cycloidal pin gear hydraulic motor comprises an output shaft supported on a shell, a cycloidal pin gear stator fixedly connected with the shell through a separation disc, and a rear cover fixedly connected with the cycloidal pin gear stator;

the inner end of the output shaft is meshed with the outer teeth at one end of the linkage shaft through the inner spline of the output shaft, the outer teeth at the other end of the linkage shaft are meshed with the inner spline of the cycloidal pin wheel rotor, and the cycloidal pin wheel rotor and the cycloidal pin wheel stator form a cycloidal pin wheel pair; the method is characterized in that:

2. The gerotor pinwheel hydraulic motor of claim 1, wherein: the elastic clamp spring is a C-shaped clamp spring made of a spring steel wire.

3. The gerotor pinwheel hydraulic motor of claim 2, wherein: the groove is provided with an arc bottom matched with the section of the elastic clamp spring.

4. The gerotor hydraulic motor of claim 3, wherein: the depth of the groove is larger than the depth of the internal spline teeth of the cycloidal pin gear rotor.