CN218235340U

CN218235340U - Axial flow distribution cycloid hydraulic motor

Info

Publication number: CN218235340U
Application number: CN202222427800.4U
Authority: CN
Inventors: 王志生; 李璐; 王建玺
Original assignee: ZHENJIANG DALI HYDRAULIC MOTOR CO Ltd
Current assignee: ZHENJIANG DALI HYDRAULIC MOTOR CO Ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2023-01-06
Anticipated expiration: 2032-09-14

Abstract

The utility model relates to an axle distribution cycloid hydraulic motor belongs to hydraulic transmission technical field. The front bearing and the rear bearing are needle roller bearings, the diameter of the flow distribution shaft of the output shaft and the diameter of the front bearing mounting shaft are set to be the same size, the flow distribution pore passage and the rear bearing mounting hole of the body shell are set to be the same through hole, an integral cycloid rotor and stator meshing pair with a 6/7 tooth structure is adopted, an axial hole is formed in one connecting bolt position and communicated with an oil port, and the number of the connecting bolts is one less than that of the stator teeth. The utility model has the advantages of simple and compact overall structure, the motion is steady reliable, and bearing self reliability high bearing capacity is strong, and the manufacturing process nature is good, assembly and maintenance manufacturability are good to satisfy the user demand.

Description

Axial flow distribution cycloid hydraulic motor

Technical Field

The utility model relates to a cycloid hydraulic motor, especially an axle distribution flow cycloid hydraulic motor belongs to hydraulic transmission technical field.

Background

The cycloid hydraulic motor is a hydraulic driving device which is commonly used, is a low-speed large-torque motor, has the advantages of small volume, large 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, a cycloid pinwheel meshing pair and a flow distribution mechanism are arranged at one end, the flow distribution mechanism can be placed in front of or behind the cycloid pinwheel meshing pair, the front (one side of the body shell) is generally used for distributing flow for a shaft valve, the circular surface of a flow distribution system is axially arranged, the rear (one side of the rear cover) is used for distributing flow for a plane, the plane of the flow distribution system is radially arranged, and an output shaft is arranged at the other end. The rotor of the cycloidal pin gear meshing pair is meshed with the external teeth at one end of the universal driving shaft through the 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 liquid 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 expanded meshing cavity and the contracted 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 synchronously driven to rotate by the linkage shaft, 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 cycloid hydraulic motor.

According to the knowledge of the applicant, the application of the existing shaft valve flow distribution cycloid hydraulic motor with a small structure is rapidly developed, mainly comprising an OMP series of Danish DANFOSS, an H series of American EATON, an MP series of Bulgaria M + S, a BMP series of the applicant company and the like, an integral 6/7-tooth rotating stator meshing pair is adopted, the shaft extension of a wheel flange installation connection mode needs to bear reliable large radial force according to the application requirement standard, and even if a radial needle bearing is installed between the front end and the rear end of an output shaft and a body shell hole or is not arranged, the output bearing capacity of large radial force is still difficult to be obviously improved to meet the market requirement, the reliability of a working condition of large radial force load is improved.

Disclosure of Invention

The utility model discloses aim at: aiming at the problems in the prior art, the motor has the advantages of compact structure, small overall dimension, simple and reliable structure, good manufacturing process and good assembly process, and adopts an integral rotor and stator meshing pair, especially a wheel flange connection mode.

In order to achieve the above purpose, the applicant proposes a cycloid hydraulic motor structure with compact structure and high radial bearing capacity through structural analysis of the motor in the prior art, and the technical scheme of the utility model is as follows: a kind of axial flow distribution cycloid hydraulic motor, including front cover and body shell that link firmly each other, and one end links firmly with body shell through the spacer disc, another end and the back cover links firmly the rotating stator engagement pair; an output shaft with an outer end extending out of the shaft extension is arranged in the body shell, and the output shaft is in transmission connection with the rotor-stator meshing pair through a linkage shaft; the improvement is that: the front bearing and the rear bearing are needle roller bearings, the flow distribution shaft diameter of the output shaft and the front bearing installation shaft diameter are set to be the same size shaft diameter, the flow distribution pore passage of the body shell and the rear bearing installation hole are set to be the same through hole, the front bearing is a full-mounted cylindrical roller bearing, the support frame of the cylindrical roller bearing adopts an inwards concave grinding process, the outer circle of the support frame of the cylindrical roller bearing is installed on the circular surface of the stepped hole of the body shell, the roller inner tangent circle of the cylindrical roller bearing is installed on the flow distribution shaft diameter of the output shaft, the rotating sealing gear stepped shaft diameter of the output shaft is axially limited forwards by the whole body formed by the plane bearing and the check ring, and the output shaft is axially abutted against the spacer disc backwards to be limited.

Further preferably, the supporting frame of the cylindrical roller bearing is an integral grinding quenching part, and the axial play amount of the cylindrical roller in the supporting frame is controllable.

An hydraulic fluid port of body shell is direct to communicate with each other with the rear portion of output shaft flow distribution ring groove, another hydraulic fluid port of body shell is indirect to communicate with each other with the anterior flow distribution ring groove of output shaft, and two check valves that body shell front end set up communicate with each other with one of them hydraulic fluid port respectively, because two hydraulic fluid ports are the transversal arrangement of perpendicular output shaft, another hydraulic fluid port of body shell adopts the machining mode unable direct to communicate with each other with the anterior flow distribution ring groove of output shaft, an axial hole is processed out to the position of the connecting bolt hole that another hydraulic fluid port of body shell is close, another hydraulic fluid port of body shell communicates with the axial hole, the axial hole communicates with each other with a check valve hole, a radial waist type hole is processed out to the body shell position that the anterior flow distribution ring groove of axial hole and output shaft was supported nearly, waist type hole, axial hole and hydraulic fluid port hole have constituted another indirect hydraulic fluid port and have joined in marriage the front portion of output shaft flow distribution ring groove and communicate with each other.

The rotor-stator meshing pair is a cycloidal rotor-stator meshing pair with an integral 6/7 tooth structure, the rotor-stator meshing pair is fixedly connected with the body shell, the separation disc and the rear cover into a whole through uniformly distributed connecting bolts, an axial hole is formed in the position of one connecting bolt of the body shell and communicated with the oil port, a plug with a sealing ring for sealing can be arranged at the tail end of the axial hole, and the axial hole can also be directly sealed by directly utilizing the separation disc entity. The number of the connecting bolts is one less than that of the stator pin teeth.

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

the utility model discloses a cycloidal hydraulic motor of axle distribution, through the overall arrangement structure research to cycloidal hydraulic motor, the output shaft distribution diameter of axle and the front bearing installation diameter of axle of this motor set up to same diameter of axle, cylindrical roller bearing's support frame is whole grinding quenching technology, make this cycloidal hydraulic motor overall structure simple compactness, the steady motion is reliable, bearing self reliability high bearing capacity is strong, the manufacturing technology is good, the assembly is good with the maintenance technology, thereby satisfy the user demand.

Drawings

In order to make the content of the present invention more clearly understood, the present invention will be described in further detail with reference to the following embodiments of the present invention, in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

In the figure: the device comprises an output shaft 1, a key 2, a dust ring 3, a shaft seal 4, a front cover 5, a one-way valve body 6, a sealing ring 7, a valve ball 8, a body shell 9, an oil port cover 10, a choke plug 11, a sealing ring 12, an O-shaped ring 13, a separation disc 14, a rotor-stator meshing pair 15, a rear cover 16, a screw plug 17, a gasket 18, a steel gasket 19, a connecting bolt 20, a rear bearing 21, a linkage shaft 22, a front bearing 23, a plane thrust bearing 24, an O-shaped ring 25, a screw 26 and a check ring 27.

Fig. 2 is a right side view of the embodiment of fig. 1.

Detailed Description

The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

The above object is achieved by the following embodiments:

example one

Referring to fig. 1, the basic structure of an axial flow distribution cycloid hydraulic motor of the present invention is an axial flow distribution cycloid hydraulic motor, which comprises a front cover 5 and a body shell 9 fixedly connected with each other, and a rotor-stator meshing pair 15, wherein one end of the rotor-stator meshing pair is fixedly connected with the body shell 9 through a separation disc 14, and the other end of the rotor-stator meshing pair is fixedly connected with a rear cover 16; an output shaft 1 with an outer end extending out of a shaft is arranged in the body shell 9, and the output shaft 1 is in transmission connection with a rotor-stator meshing pair 15 through a linkage shaft 22; the output shaft 1 installed in the body shell 9 is provided with a bearing in the front and back direction, the front bearing 23 is a cylindrical roller bearing, the back bearing 21 is a needle bearing, the position of the front bearing 23 is close to the front cover 5, the position of the back bearing 21 is close to the partition plate 14, the flow distribution shaft diameter of the output shaft 1 and the mounting shaft diameter of the front bearing 23 are set to be the same shaft diameter, the shaft diameter size is the same, the flow distribution pore passage of the body shell 9 and the mounting hole of the back bearing 21 are set to be a through hole, the size of the through hole is the same, the front bearing 23 is a full-mounted cylindrical roller bearing, the support frame of the cylindrical roller bearing adopts a concave structure and a grinding process, the outer circle of the support frame of the cylindrical roller bearing is installed on the circular surface of the step hole of the body shell 9, the roller inscribed circle of the cylindrical roller bearing is installed on the flow distribution shaft diameter of the output shaft 1, the step shaft diameter of the rotary sealing gear of the output shaft 1 is limited forward and the output shaft 1 axially forward by the whole composed of the plane bearing 24 and the retainer ring 27, the output shaft 1 is limited by the backward axially abutted against the partition plate 14, one end of the front cover 23 is in the forward direction, and one end of the back bearing 21 is in the partition plate direction.

Preferably, the supporting frame of the cylindrical roller bearing is an integral grinding quenching part, the two ends of the concave body can be axially limited, the axial displacement of the cylindrical roller on the supporting frame is controllable, and the problem that the axial displacement of the cylindrical roller is large due to the fact that one end of a common cylindrical roller bearing is axially limited by a hole check ring part is solved.

Further preferably, an oil port of the body housing 9 is directly communicated with a rear flow distribution ring groove of the output shaft 1, since an oil inlet and an oil outlet of the wheel flange structure are transversely arranged perpendicular to the axis of the output shaft 1, another oil port of the body housing 9 is indirectly communicated with a front flow distribution ring groove of the output shaft 1, meanwhile, two check valves arranged at the front end of the body housing 9 are respectively communicated with one oil port, each check valve consists of a check valve body 6, a seal ring 7 and a valve ball 8, and is arranged in a check valve hole at the front end of the body housing 9, 2 seal rings 7 of each check valve are communicated with an inner cavity of the motor through inclined holes on the body housing 9, and since the two oil ports of the oil inlet and the oil outlet are transversely arranged perpendicular to the output shaft 1, one of them hydraulic fluid port of body shell 9 adopts the direct anterior flow distribution ring groove with output shaft 1 of machining mode to communicate with each other, nevertheless one of them hydraulic fluid port of body shell 9 adopts the unable direct anterior flow distribution ring groove with output shaft 1 of machining mode to communicate with each other, an axial hole is processed out to the position of another hydraulic fluid port connection bolt hole that closes of body shell 9, another hydraulic fluid port hole and the axial hole of body shell 9 communicate with each other, the axial hole communicates with each other with a one-way valve hole, a radial waist type hole is processed out to the body shell 9 position that the anterior flow distribution ring groove of axial hole and output shaft 1 is close, waist type hole, axial hole and hydraulic fluid port hole have constituted that another hydraulic fluid port is indirect to communicate with each other with the anterior flow distribution ring groove of output shaft.

The rotor-stator meshing pair 15 is a cycloidal rotor-stator meshing pair with an integral 6/7 tooth structure, the rotor-stator meshing pair 15 is composed of a stator and a rotor, circular-arc-shaped uniformly-distributed pin teeth are arranged in an inner hole of the stator, the rotor-stator meshing pair 15 is fixedly connected with a body shell 9, a partition plate 14 and a rear cover 16 into a motor whole through uniformly-distributed connecting bolts 20, an axial hole is formed in one connecting bolt of the body shell 9 and communicated with an oil port, a steel plug with a sealing ring for sealing can be arranged at the tail end of the axial hole, the steel plug can be directly sealed by the partition plate 14, and a plane of a joint surface is directly sealed. The number of the coupling bolts 20 is one less than that of the stator arc pins, as shown in fig. 2.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent one embodiment of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An axial flow distribution cycloid hydraulic motor comprises a front cover, a body shell and a rotating stator meshing pair, wherein the front cover and the body shell are fixedly connected with each other, one end of the rotating stator meshing pair is fixedly connected with the body shell through a separation disc, the other end of the rotating stator meshing pair is fixedly connected with a rear cover, an output shaft with an outer end extending out of an axial extension is arranged in the body shell, and the output shaft is in transmission connection with the rotating stator meshing pair through a linkage shaft; the method is characterized in that: the front bearing and the rear bearing are respectively arranged at the front and the rear of the output shaft arranged in the body shell, the front bearing is a cylindrical roller bearing, the rear bearing is a needle bearing, the diameter of a flow distribution shaft of the output shaft and the diameter of a front bearing mounting shaft are set to be the same size, and a flow distribution pore passage of the body shell and a rear bearing mounting hole are set to be the same through hole.

2. The axial flow gerotor hydraulic motor of claim 1, further comprising: the front bearing is a full complement cylindrical roller bearing, the support frame of the cylindrical roller bearing adopts an inward concave grinding process, the excircle of the support frame of the cylindrical roller bearing is installed on the circular surface of the stepped hole of the body shell, and the roller inscribed circle of the cylindrical roller bearing is installed on the diameter of the flow distribution shaft of the output shaft.

3. The axial flow gerotor hydraulic motor of claim 2, further comprising: the rotating sealing gear step diameter of the output shaft is limited by the whole body formed by the plane bearing and the retainer ring in the forward axial direction, and the output shaft is limited by the axial support against the partition plate in the backward direction.

4. The axial flow gerotor hydraulic motor of claim 2, further comprising: the supporting frame of the cylindrical roller bearing is an integral grinding quenching part, and the axial movement amount of the cylindrical roller in the supporting frame is controllable.

5. The axial flow cycloid hydraulic motor of claim 1 or 2, wherein: one oil port of the body shell is directly communicated with the rear flow distribution ring groove of the output shaft, the other oil port of the body shell is indirectly communicated with the front flow distribution ring groove of the output shaft, and two check valves arranged at the front end of the body shell are respectively communicated with one oil port.

6. The axial flow gerotor hydraulic motor of claim 5, further comprising: an axial hole is processed to the position of the connecting bolt hole that another hydraulic fluid port of body shell is close, another hydraulic fluid port hole and the axial hole of body shell communicate, the axial hole communicates with each other with a check valve hole, the radial waist type hole of body shell position processing that the anterior flow distribution ring groove of axial hole and output shaft is close, waist type hole, axial hole and hydraulic fluid port hole have constituted that another hydraulic fluid port is indirect to communicate with each other with the anterior flow distribution ring groove of output shaft.

7. The axial flow gerotor hydraulic motor of claim 6, further comprising: the rotor-stator meshing pair is a cycloidal rotor-stator meshing pair with an integral 6/7-tooth structure, an axial hole is formed in a connecting bolt position of the body shell and communicated with the oil port, and a plug with a sealing ring for sealing is arranged at the tail end of the axial hole or directly sealed by a spacer disc entity.

8. The axial flow gerotor hydraulic motor of claim 7, further comprising: the number of the connecting bolts is one less than that of the stator pin teeth.