CN215907991U

CN215907991U - High-speed flow distribution cycloid hydraulic motor

Info

Publication number: CN215907991U
Application number: CN202121980257.XU
Authority: CN
Inventors: 王志生; 盛伟
Original assignee: ZHENJIANG DALI HYDRAULIC MOTOR CO Ltd
Current assignee: ZHENJIANG DALI HYDRAULIC MOTOR CO Ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-02-25
Anticipated expiration: 2031-08-23

Abstract

The utility model relates to a high-speed flow distribution cycloid hydraulic motor, and belongs to the technical field of hydraulic transmission. The hydraulic motor comprises a body shell, an output shaft arranged in the body shell, a rotating stator pair, a flow distribution system, a flow channel for oil to enter and exit from an inner cavity of the motor, a pressure balance plate and a rear cover, wherein the rotating stator pair, the flow distribution system and the flow channel are fixedly connected with the body shell by adopting connecting bolts; the output shaft has been set up in the body shell, and the output shaft relies on two bearings that set up around in the body shell to support, and body shell and skeleton bearing seal separation, skeleton bearing seal set up in the shaft seal seat, and the shaft seal seat supports with the front bearing axial and leans on the installation. The motor has compact structure and stable and reliable motion, reduces the difficulty of part processing technology, ensures the position precision of the shell hole of the motor body, improves the bearing capacity and reliability of the bearing, and enhances the assembly performance and the maintainability, thereby meeting the use requirement.

Description

High-speed flow distribution cycloid hydraulic motor

Technical Field

The utility model relates to a cycloid hydraulic motor capable of converting hydraulic energy into mechanical energy, in particular to a high-speed flow distribution cycloid hydraulic motor, and belongs to the technical field of hydraulic transmission.

Background

The cycloid hydraulic motor is a common hydraulic driving device, is a low-speed large-torque motor, has the advantages of small volume, high unit power density, high efficiency, wide rotating speed range and the like, is widely applied, and is more widely applied along with further improvement of the industrial and agricultural development level in China.

The basic structure of the device is that a liquid inlet and a backflow port are arranged on a body shell or a rear cover, one end of the device is provided with a cycloid pinwheel meshing pair and a flow distribution mechanism, the flow distribution mechanism can be placed in front of or behind the cycloid pinwheel meshing pair and generally distributes flow for a shaft valve in front (on one side of the body shell), a circular surface of a flow distribution system is axially arranged, plane flow distribution is arranged on the rear (on one side of the rear cover), a plane of the flow distribution system is radially arranged, and the other end of the flow distribution system is provided with an output shaft. And a rotor of the cycloidal pin gear meshing pair is meshed with an external tooth at one end of the universal driving shaft through an internal spline, and the other end of the universal driving shaft is in transmission connection with the output shaft. When the cycloidal pin gear pair works, the flow distribution mechanism enables the liquid inlet to be communicated with the expansion meshing cavity of the cycloidal pin gear pair and enables the contraction cavity of the cycloidal pin gear pair to be communicated with the reflux port. As a result, pressure liquid enters the body shell or the rear cover from the liquid inlet and then enters the expansion meshing cavity formed by the cycloid pin gear meshing pair, so that the volume of the expansion meshing cavity is continuously enlarged, and meanwhile, liquid in the contraction meshing cavity formed by the cycloid pin gear meshing pair flows back from the return port; in the process, the rotor of the cycloidal pin gear meshing pair is driven to rotate by the pressure difference between the expansion meshing cavity and the contraction meshing cavity, and the rotation is transmitted to the output shaft through the linkage shaft to be output, so that the conversion from hydraulic energy to mechanical energy is realized. Meanwhile, the flow distribution mechanism is also driven by the linkage shaft to rotate, and the communication state is repeatedly and continuously switched, so that the conversion process is continued. Thus, the motor can continuously output torque, and the cycloid pin gear meshing pair and the flow distribution mechanism are the core of the hydraulic motor.

The high-speed flow distribution cycloid hydraulic motor is also similar to a plane flow distribution structure motor, a flow distribution system of the high-speed flow distribution cycloid hydraulic motor is mainly integrated on a flow distribution supporting plate, the flow distribution supporting plate is provided with regular radial oil passages, and the flow distribution system is also arranged in a plane radial mode.

According to the knowledge of the applicant, the current high-speed flow distribution cycloid hydraulic motor basically adopts an integral mounting flange structure, for example, the chinese patent document with publication number CN 203685462U is a typical mounting structure for bearing supporting one-way deep-hole shaft seals at two ends of an output shaft, or the chinese patent document with publication number CN 206582058U is a typical mounting structure for bearing supporting two-way shaft seals at two ends of an output shaft in the middle, which causes great inconvenience in processing, assembling, repairing and replacing motor parts.

Disclosure of Invention

Therefore, it is necessary to provide a high-speed flow distribution cycloid hydraulic motor which is convenient for operations such as motor part processing, assembly, maintenance and replacement, and the like, aiming at the problem that motor parts are inconvenient to process, assemble, maintain and replace and the like.

The above object is achieved by the following embodiments:

a high-speed flow distribution cycloid hydraulic motor comprises a body shell with a mounting flange surface, an output shaft, a rotating stator pair, a flow distribution system, a flow channel, a pressure balance plate and a rear cover, wherein the output shaft is arranged in the body shell and used for outputting torque, the rotating stator pair, the flow distribution system, the flow channel, the pressure balance plate and the rear cover are fixedly connected with the body shell through connecting bolts, the body shell is provided with the mounting flange and a positioning spigot, the output shaft is arranged in the body shell and supported by two bearings which are arranged in the body shell front and back, and the body shell is separated from a framework shaft seal.

The framework shaft seal is arranged in the shaft seal seat, the section of the shaft seal seat is an L-shaped annular body, the outer circular surface of the shaft seal seat is arranged in the body shell hole and is sealed by a sealing ring, and one end of a supporting steel framework of the framework shaft seal is abutted against the inner wall of the L-shaped annular body of the shaft seal seat.

The front bearing is arranged in the body shell hole, one end of the front bearing is abutted against the L-shaped bottom end face of the annular body of the shaft seal seat, the other end of the front bearing is abutted against one end face of the hole block, and the hole block is arranged in the body shell hole and axially limits the front bearing. The bearing retainer ring is abutted to the small end face of the L shape of the annular body of the shaft seal seat, a plane bearing is arranged between the bearing retainer ring and the shaft shoulder of the output shaft, or the shaft shoulder of the output shaft is abutted to the plane bearing arranged behind the bearing retainer ring, and the output shaft is limited at two axial ends by the hole stop and the plane bearing arranged at the tail end of the output shaft. The other end of hole shelves sets up the dust ring, the dust ring is L type skeleton texture, and the dust ring has external dustproof effect, has sealed lubricating grease's effect inwards.

In a further improvement, the shaft seal seat is arranged in the body shell hole, the bottom end face of the shaft seal seat is abutted against one end face of the hole stop, the other end of the shaft seal seat is abutted against one end face of the front bearing, the other end of the front bearing is abutted against one end face of the bearing retainer ring, a plane bearing is arranged between the bearing retainer ring and the output shaft shoulder, or the output shaft shoulder is abutted against the plane bearing arranged behind the bearing retainer ring. The output shaft is limited at two axial ends by the hole stop and the plane bearing arranged at the tail end of the output shaft. The hole stopper is installed in the body shell hole and abuts against the bottom end face of the shaft seal seat to axially limit the shaft seal seat. The other end of the hole stop is provided with a dustproof ring which is of an L-shaped framework structure and has an external dustproof effect.

After the technical scheme is adopted, the utility model has the beneficial effects that:

according to the high-speed flow distribution cycloid hydraulic motor, the output shaft is arranged in the body shell, the body shell is connected with the rotating stator pair, the flow distribution system, the pressure balance plate and the rear cover through the connecting bolts, the whole structure of the cycloid hydraulic motor is compact, the motion is stable and reliable, the body shell is separated from the framework shaft seal, the framework shaft seal is arranged in the shaft seal seat, the difficulty of the motor part processing technology is reduced, the position precision of a motor body shell hole can be ensured, the bearing capacity and reliability of a bearing are improved, and the assembly performance and the maintainability are enhanced, so that the use requirements are met.

Drawings

The present invention is described in further detail below with reference to the attached drawing figures.

Fig. 1 is a schematic structural diagram of a motor according to a first embodiment of the utility model.

In the figure, an output shaft 1, a dust ring 2, a front bearing 3, a shaft seal seat 4, a skeleton shaft seal 5, a sealing ring 6, a bearing retainer ring 7, a body shell 8, a plane bearing 9, an oil port cover 10, a rear needle bearing 11, a flow distribution supporting plate 12, a rotor stator pair 13, a connecting bolt 14, a pressure balance plate 15, a steel ball 16, a sealing ring 17, a rear cover 18, a sealing ring 19, a compensation pad 20, a sealing ring 21, a plane bearing 22, a linkage shaft 23, a hole baffle 24 and an O-shaped ring 25 are arranged on the output shaft.

Fig. 2 is a schematic structural diagram of a motor according to a second embodiment of the present invention.

In the figure, a front bearing 3 ', a shaft seal seat 4', a skeleton shaft seal 5 'and a sealing ring 6'.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

The above object is achieved by the following embodiments:

example one

Referring to fig. 1, the basic structure of a high-speed flow distribution cycloid hydraulic motor of the present invention comprises a body shell 8 with a mounting flange surface, an output shaft 1 of torque output arranged in the body shell 8, a rotating stator pair 13 fixedly connected with the body shell 8 by a connecting bolt 14, a flow distribution system, a flow passage of oil entering and exiting from the motor cavity, a pressure balance plate 15, a rear cover 18, etc.; the body shell 8 is provided with a mounting flange and a positioning spigot, the mounting flange and the positioning spigot are connected with a motor-driven device, an output shaft 1 is arranged in the body shell 8, the output shaft 1 is supported by two bearings arranged in the body shell 8 from front to back and is respectively a front bearing 3 and a rear needle bearing 11, the body shell 8 is separated from a framework shaft seal 5, and the framework shaft seal 5 is arranged in a mounting hole structure formed by the body shell 8 per se in different traditions. After the structure of the mounting framework shaft seal 5 is separated, the processing technology difficulty of the mounting hole of the body shell 8 can be reduced, the guarantee of form and position tolerance and the inspection and confirmation of the body shell 8 hole in the processing process are particularly facilitated, and meanwhile, the assembly manufacturability and the product maintainability are improved.

The shaft seal structure is characterized in that the framework shaft seal 5 is arranged in the shaft seal seat 4, the section of the shaft seal seat 4 is an L-shaped annular body, the outer circular surface of the shaft seal seat 4 is arranged in a hole of the body shell 8 to form an assembly joint surface, the joint surface formed by sealing and assembling is carried out by adopting the sealing ring 6, one end of a supporting steel framework of the framework shaft seal 5 is abutted against the inner wall of the L-shaped annular body of the shaft seal seat 4, and the other end of the supporting steel framework of the framework shaft seal 5 is abutted against the axial inner wall of the bottom end face of the L-shaped annular body of the shaft seal seat 4.

The front bearing 3 is arranged in a body shell 8 hole, one end of the front bearing abuts against the L-shaped bottom end face of the annular body of the shaft seal seat 4, the other end of the front bearing abuts against one end face of the hole stopper 24, and the hole stopper 24 is arranged in the body shell 8 hole and axially limits the front bearing 3. The small end face of the L type of the ring body of the shaft seal seat 4 abuts against the bearing retainer ring 7, the small end face is the opposite face of the bottom end face of the shaft seal seat 4, a plane bearing 9 is arranged between the bearing retainer ring 7 and the shaft shoulder of the output shaft 1, the replaced shaft shoulder of the output shaft 1 abuts against the plane bearing 9 arranged behind the bearing retainer ring, and the output shaft 1 is limited at the two axial ends by the hole gear 24 and the plane bearing 22 arranged at the tail end of the output shaft. The other end of hole shelves 24 sets up dust ring 2, dust ring 2 is L type skeleton texture, and dust ring 2 has external dustproof effect, has sealed lubricating grease's effect internally.

Example two

Referring to fig. 2, the structure of the high-speed flow distribution cycloid hydraulic motor of the present invention is further improved, the shaft seal seat 4 'is disposed in the body shell hole, the bottom end surface of the shaft seal seat 4' abuts against one end surface of the hole stop, the other end abuts against one end surface of the front bearing 3 ', the other end of the front bearing 3' abuts against one end surface of the bearing retainer ring, a plane bearing is disposed between the bearing retainer ring and the output shaft shoulder, or the output shaft shoulder abuts against a plane bearing disposed behind the bearing retainer ring, and the output shaft is axially limited at both ends by the hole stop and the plane bearing disposed at the end of the output shaft. The hole stopper is installed in the body shell hole and abuts against the bottom end face of the shaft seal seat to axially limit the shaft seal seat. The other end of the hole stop is provided with a dustproof ring which is of an L-shaped framework structure and has an external dustproof effect. The present embodiment is different from the first embodiment: the positions of the front bearing and the shaft seal seat are exchanged, and the matched sealing position is changed along with the exchange, so that the front bearing 3' is soaked in oil liquid in a cavity of the motor when in use.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a high-speed distribution cycloid hydraulic motor, includes the body shell that has the installation flange face, settles the output shaft of the moment of torsion output in the body shell, and with the runner of the vice, the distribution system of rotating stator that the body shell adopted connecting bolt to link firmly and fluid business turn over motor inner chamber, pressure balance board and back lid, its characterized in that: the body shell is provided with a mounting flange and a positioning spigot, an output shaft is arranged in the body shell, the output shaft is supported by two bearings which are arranged in the body shell from front to back, the body shell is separated from a framework shaft seal, the framework shaft seal is arranged in a shaft seal seat, the cross section of the shaft seal seat is an L-shaped annular body, the outer circular surface of the shaft seal seat is arranged in a body shell hole and is sealed by a sealing ring, and one end of a supporting steel framework of the framework shaft seal is abutted against the inner wall of the L-shaped annular body of the shaft seal seat.

2. A high speed port cycloid hydraulic motor as set forth in claim 1 wherein: the two bearings are respectively a front bearing and a rear needle bearing, the front bearing is arranged in the body shell hole, one end of the front bearing is abutted against the L-shaped bottom end face of the shaft seal seat annular body, the other end of the front bearing is abutted against one end face of the hole stopper, and the hole stopper is arranged in the body shell hole and axially limits the front bearing.

3. A high speed port cycloid hydraulic motor as set forth in claim 2 wherein: the L-shaped small end face of the annular body of the shaft seal seat is abutted against a bearing retainer ring, and a plane bearing is arranged between the bearing retainer ring and the shaft shoulder of the output shaft.

4. A high speed port cycloid hydraulic motor as set forth in claim 1 wherein: the shaft seal seat is arranged in the body shell hole, the bottom end face of the shaft seal seat abuts against one end face of the hole stop, the other end of the shaft seal seat abuts against one end face of the front bearing, the other end of the front bearing abuts against one end face of the bearing retainer ring, and a plane bearing is arranged between the bearing retainer ring and the output shaft shoulder.

5. A high speed port cycloid hydraulic motor as set forth in claim 4 wherein: the hole stopper is installed in the body shell hole and abuts against the bottom end face of the shaft seal seat to axially limit the shaft seal seat.

6. A high speed port cycloid hydraulic motor as claimed in claim 2 or 4, characterized in that: the other end of the hole stop is provided with a dustproof ring which is of an L-shaped framework structure.

7. A high speed port cycloid hydraulic motor as claimed in claim 3 or 4, characterized in that: and the output shaft shoulder is abutted against a bearing retainer ring and then is provided with a plane bearing.

8. A high speed port cycloid hydraulic motor of claim 7 wherein: the output shaft is limited at two axial ends by the hole stop and the plane bearing arranged at the tail end of the output shaft.