Directly connected high efficiency cycloid hydraulic motor

Abstract

The present application relates to the technical fields of hydraulic transmission system execution element, especially to a direct connection type high-efficiency cycloid hydraulic motor, comprising a front cover, a shell, a stator, a rear cover, an output shaft and a rotor. The direct connection type high-efficiency cycloid hydraulic motor is coaxially connected with a driving gear ring engaged with an annular transmission gear groove through a lateral shaft tube near the output shaft connecting end. The output shaft and the rotor are directly connected in transmission, without linkage mechanism, so that the transmission efficiency is greatly improved. The lateral shaft tube is elastically assembled with the driving gear ring engaged with the annular transmission gear groove. The driving gear ring is composed of an internal adjusting slider slidingly assembled in an inclined telescopic adjusting groove, an integrated lateral gear block fixed on the outer side surface of the internal adjusting slider and an inclined guide strip fixed on the outer walls on both sides of the internal adjusting slider. The sliding telescopic assembly not only facilitates the assembly of the driving gear ring, but also improves the engagement transmission stability of the driving gear ring and the annular transmission gear groove.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic transmission system execution element, and particularly relates to a direct-connection type high-efficiency cycloid hydraulic motor. BACKGROUND

[0002] The cycloid hydraulic motor is one of hydraulic motors, and the hydraulic motor is an execution element of a hydraulic system, which converts liquid pressure energy provided by a hydraulic pump into mechanical energy (torque and rotating speed) of an output shaft. The liquid is a medium for transmitting force and motion. The hydraulic motor is mainly applied to injection molding machines, ships, hoisting machines, engineering machines, construction machines, coal mine machines, mine machines, metallurgical machines, ship machines, petroleum and chemical machines, port machines and the like.

[0003] The cycloid hydraulic motor is fixedly connected with the housing through an inner gear ring, and oil entering from an oil port drives the rotor to revolve around a center point. The slowly rotating rotor drives an output through a spline shaft, and the cycloid hydraulic motor is called. After the original cycloid motor appeared, another concept motor was formed after decades of evolution. The motor is installed with a roller in the built-in gear ring, and the motor with the roller can provide higher starting and running torque. The roller reduces friction, thereby improving efficiency, and the output shaft can produce stable output even at very low rotating speed. The motor is rapidly reversed by changing the direction of input and output flow, and equal value torque is generated in two directions. The motors of various series have various displacement options to meet various speed and torque requirements.

[0004] At present, the driving shaft and the rotor in the cycloid hydraulic motor on the market need to be connected through a linkage mechanism, and the traditional linkage mechanism is mostly an integral structure and cannot be adjusted. In order to ensure the stability in the process of rotating swing, the production and assembly precision is required to be relatively high, the assembly mode is single, and the transmission efficiency is not high. SUMMARY

[0005] The technical problem to be solved by the present application is that in order to solve the problems in the background art, an improved direct-connection type high-efficiency cycloid hydraulic motor is provided to solve the problems that the traditional linkage mechanism is mostly an integral structure and cannot be adjusted, in order to ensure the stability in the process of rotating swing, the production and assembly precision is required to be relatively high, the assembly mode is single, and the transmission efficiency is not high.

[0006] The technical scheme adopted by the present application to solve its technical problems is: a direct-connection type high-efficiency cycloid hydraulic motor, comprising a front cover, a shell, a stator, a rear cover, an output shaft and a rotor, an internal driving chamber for assembling the rotor is formed in the stator, an internal driving blind hole is formed in the output shaft close to the rotor end, an annular transmission tooth groove is formed in the internal driving blind hole inner side surface at the opening position, a driving tooth ring engaged with the annular transmission tooth groove is coaxially connected to the rotor close to the output shaft connecting end through a lateral shaft tube, and a partition disc provided with a sealing ring inside is fixedly connected to the stator on both sides.

[0007] The internal driving chamber inner side surface is provided with a plurality of integral structure arc-shaped sealing protrusions in an annular array, and the rotor outer wall is provided with a plurality of arc-shaped driving grooves in the internal driving chamber.

[0008] A plurality of obliquely arranged expansion adjustment grooves are formed in the lateral shaft tube outer side surface, the driving tooth ring comprises an internal adjustment sliding block slidingly assembled in the obliquely arranged expansion adjustment groove, an integral structure lateral tooth block fixed on the internal adjustment sliding block outer side surface, an internal movable extrusion groove formed on the internal adjustment sliding block inner side inclined surface, a lateral assembly opening formed on the obliquely arranged expansion adjustment groove inner side surface, an internal extrusion spring sleeved in the lateral assembly opening, obliquely arranged guide grooves formed on the obliquely arranged expansion adjustment groove two side inner walls, and obliquely arranged guide strips fixed on the internal adjustment sliding block two side outer walls.

[0009] The internal adjustment sliding block is provided with a lateral assembly sliding groove with an embedded roller pin on the internal adjustment sliding block side wall close to the internal driving blind hole.

[0010] The output shaft outer side surface is provided with an annular groove with an embedded thrust roller bearing at the internal driving blind hole opening position and the output shaft outer side surface away from the internal driving blind hole opening end.

[0011] The internal driving blind hole inner side surface is provided with a lateral oil guide hole in communication with the output shaft outer side surface.

[0012] The lateral shaft tube inner side surface is provided with an integral structure internal reinforcing rib.

[0013] The arc-shaped driving groove inner side surface is provided with an internal thread sunken hole with an embedded lateral limiting bolt, the rotor internal center position is provided with an internal tooth groove hole, the lateral shaft tube outer side arc surface is provided with an integral structure external assembly tooth ring protruding into the internal tooth groove hole, the lateral shaft tube outer side arc surface is provided with an internal positioning through hole matched with the lateral limiting bolt, and the lateral limiting bolt is inserted into the internal positioning through hole from the internal thread sunken hole to control the coaxial fixation of the rotor and the lateral shaft tube.

[0014] The internal thread sunken hole inside is welded with an external limiting sealing sleeve at the outer end of the lateral limiting bolt.

[0015] The beneficial effects of the present application are:

[0016] (1) The straight connection type high-efficiency cycloid hydraulic motor of the present application is coaxially connected with the driving gear ring engaged with the annular transmission gear groove through the lateral shaft tube close to the output shaft connection end of the rotor, and the output shaft and the rotor are drivingly connected in a direct driving manner, without the need for linkage mechanism, so that the transmission efficiency is greatly improved;

[0017] (2) The driving gear ring engaged with the annular transmission gear groove is elastically assembled outside the lateral shaft tube, and the driving gear ring is composed of an internal adjusting slider slidingly assembled in the obliquely arranged telescopic adjusting groove, an integral structure lateral tooth block fixed on the outer side surface of the internal adjusting slider, and obliquely arranged guide strips fixed on the outer walls on both sides of the internal adjusting slider, which is slidingly and telescopically assembled, facilitating the assembly of the driving gear ring and improving the stability of the meshing transmission of the driving gear ring and the annular transmission gear groove;

[0018] (3) The internal adjusting slider is extruded into the internal driving blind hole through the internal extrusion spring inside the lateral assembly opening, and the internal adjusting slider is extruded into the obliquely arranged telescopic adjusting groove to control the extension of the lateral tooth block, which is automatically telescopic during assembly and disassembly, and the operation is very simple and convenient;

[0019] (4) The roller pin is arranged on the inner side wall of the internal adjusting slider close to the internal driving blind hole, which effectively avoids the wear of the internal adjusting slider and reduces the friction, so that the transmission efficiency is more efficient;

[0020] (5) The split structure design between the rotor and the lateral shaft tube can be directly modified on the existing cycloid hydraulic motor, and the application range is more extensive. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application will be further described below in conjunction with the drawings and examples.

[0022] Figure 1 is a structural schematic diagram of the present application.

[0023] Figure 2 is a structural schematic diagram of the stator and rotor assembly end in the present application.

[0024] Figure 3 is an internal cross-sectional view of the output shaft and rotor connection end in the present application.

[0025] Figure 4 is a partial cross-sectional view of the driving gear ring adjusting end in the present application. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with the drawings and examples. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present application in a schematic manner, so that only the structures related to the present application are shown.

[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A direct connection type high-efficiency cycloid hydraulic motor is shown, which comprises a front cover 1, a shell 2, a stator 3, a rear cover 4, an output shaft 5 and a rotor 6. The stator 3 is internally provided with an internal drive chamber 7 for assembling the rotor 6. The output shaft 5 is provided with an internal drive blind hole 8 near the end of the rotor 6. The internal drive blind hole 8 is internally provided with an annular transmission tooth groove 9 at the opening position. The rotor 6 is coaxially connected with a drive tooth ring engaged with the annular transmission tooth groove 9 through a lateral shaft tube 10 near the output shaft 5. The stator 3 is fixedly connected with a partition plate 12 internally provided with a sealing ring 11 on both sides.

[0029] Further, in order to cooperate with the internal drive adjustment, the internal drive chamber 7 is internally provided with four arc-shaped sealing protrusions 13 in an annular array. The outer wall of the rotor 6 is internally provided with four arc-shaped drive grooves 14.

[0030] Further, in order to cooperate with the lateral extrusion expansion and internal elastic reset, the lateral shaft tube 10 is externally provided with a plurality of obliquely arranged expansion adjustment grooves 15. The drive tooth ring comprises an internal adjustment sliding block 16 slidably assembled in the obliquely arranged expansion adjustment groove 15, an integral structure lateral tooth block 17 fixedly arranged on the outer side of the internal adjustment sliding block 16, an internal movable extrusion groove 18 arranged on the inner side of the internal adjustment sliding block 16, a lateral assembly opening 20 arranged on the inner side of the obliquely arranged expansion adjustment groove 15, an internal extrusion spring 21 sleeved in the lateral assembly opening 20, an obliquely arranged guide groove 22 arranged on the inner wall of the obliquely arranged expansion adjustment groove 15, and an obliquely arranged guide strip 23 fixedly arranged on the outer wall of the internal adjustment sliding block 16.

[0031] The internal adjustment sliding block 16 is installed by being inserted into the obliquely arranged guide groove 22. The obliquely arranged guide groove 22 and the obliquely arranged expansion adjustment groove 15 are both provided with openings for easy assembly and disassembly. The internal extrusion spring 21 is arranged on the lateral shaft tube 10 by being sleeved in the lateral assembly opening 20. The outer end of the internal extrusion spring 21 is arranged to extrude the internal adjustment sliding block 16 outward by being inserted into the internal movable extrusion groove 18.

[0032] Before the rotor 6 is assembled, the lateral tooth block 17 is retracted in the oblique telescopic adjusting groove 15, the driving tooth ring can directly pass through the partition plate 12, and then is inserted into the inner side driving blind hole 8. The inner wall of the inner side driving blind hole 8 extrudes the internal adjusting sliding block 16, the internal adjusting sliding block 16 is extruded into the oblique telescopic adjusting groove 15, the lateral tooth block 17 is extended out of the opening of the oblique telescopic adjusting groove 15, at this time, the lateral tooth block 17 is inserted into the annular transmission tooth groove 9, and when the rotor 6 rotates and revolves, the driving tooth ring can be guaranteed to be always engaged with the annular transmission tooth groove 9.

[0033] Further, in order to improve the transmission efficiency of the extrusion end and reduce the friction resistance, the internal adjusting sliding block 16 is provided with a lateral assembly sliding groove 25 with a built-in needle roller 24 close to the side wall of the inner side driving blind hole 8. Further, in order to cooperate with the assembly and reduce the friction force of the two assembly ends, the outer side surface of the output shaft 5 is provided with an annular groove 27 with a built-in thrust needle roller bearing 26 at the opening position of the inner side driving blind hole 8 and the outer side surface of the output shaft 5 away from the opening end of the inner side driving blind hole 8.

[0034] Further, in order to cooperate with the internal oil guide, the inner side surface of the inner side driving blind hole 8 is provided with a lateral oil guide hole 28 in communication with the outer side surface of the output shaft 5. Further, in order to improve the structural firmness of the lateral shaft tube 10, the inner side surface of the lateral shaft tube 10 has an integral structure internal reinforcing rib 29.

[0035] Further, in order to limit and fix the lateral bolt, the inner side surface of the arc-shaped driving groove 14 is provided with an internal thread sunken hole 31 with a built-in lateral limiting bolt 30, the inner center position of the rotor 6 is provided with an internal tooth groove hole 32, the outer side arc surface of the lateral shaft tube 10 has an integral structure external assembly tooth ring 33 protruding into the internal tooth groove hole 32, the outer side arc surface of the lateral shaft tube 10 is provided with an internal positioning through hole 34 matched with the lateral limiting bolt 30, and the lateral limiting bolt 30 is inserted into the internal positioning through hole 34 from the internal thread sunken hole 31 to control the coaxial fixation of the rotor 6 and the lateral shaft tube 10.

[0036] Further, in order to improve the external sealing and limiting properties, the external limiting sealing sleeve 35 is welded and fixed at the outer end of the lateral limiting bolt 30 inside the internal thread sunken hole 31.

[0037] The straight connection type high-efficiency cycloid hydraulic motor is characterized in that: the rotor 6 is coaxially connected with the driving gear ring engaged with the annular transmission gear slot 9 through the lateral shaft tube 10 at the connecting end close to the output shaft 5, the output shaft 5 and the rotor 6 are drivingly connected in a direct driving mode, no linkage mechanism is needed, and the transmission efficiency is greatly improved; the driving gear ring engaged with the annular transmission gear slot 9 is elastically assembled outside the lateral shaft tube 10, the driving gear ring is composed of the internal adjusting slider 16 slidingly assembled in the obliquely arranged telescopic adjusting slot 15, the integral structure lateral tooth block 17 fixed on the outer side surface of the internal adjusting slider 16 and the obliquely arranged guide strip 23 fixed on the outer walls on both sides of the internal adjusting slider 16, the sliding telescopic assembly is adopted, the driving gear ring can be conveniently assembled, and the engagement transmission stability of the driving gear ring and the annular transmission gear slot 9 is improved; the internal adjusting slider 16 is extruded into the internal driving blind hole 8 through the internal extruding spring 21 in the lateral assembly opening 20, the internal adjusting slider 16 is extruded into the obliquely arranged telescopic adjusting slot 15 to control the extension of the lateral tooth block 17, the automatic telescopic operation is convenient during assembly and disassembly; the roller pin 24 is arranged on the side wall close to the internal driving blind hole 8 of the internal adjusting slider 16, the abrasion of the internal adjusting slider 16 is effectively avoided, the friction is reduced, and the transmission efficiency is more efficient; the split type structure design is adopted between the rotor 6 and the lateral shaft tube 10, the existing cycloid hydraulic motor can be directly transformed, and the application range is more extensive.

[0038] The above is the ideal embodiment according to the application, and the related personnel can make various changes and modifications without deviating from the technical idea of the application. The technical scope of the application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A direct connection high efficiency gerotor hydraulic motor comprising a front cover (1), a housing (2), a stator (3), a rear cover (4), an output shaft (5) and a rotor (6), characterized in that: The stator (3) is internally provided with an internal driving chamber (7) for assembling the rotor (6), the output shaft (5) is internally provided with an internal driving blind hole (8) near the end of the rotor (6), the inner side of the internal driving blind hole (8) is provided with an annular transmission tooth groove (9) at the opening position, the rotor (6) is coaxially connected with a driving tooth ring engaged with the annular transmission tooth groove (9) through a lateral shaft tube (10) near the connecting end of the output shaft (5), and the stator (3) is fixedly connected with a partition plate (12) internally provided with a sealing ring (11) on both sides. The outer side of the lateral shaft tube (10) is provided with a plurality of obliquely arranged expansion adjustment grooves (15), the driving tooth ring comprises an internal adjustment sliding block (16) slidably assembled in the obliquely arranged expansion adjustment groove (15), an integral structure lateral tooth block (17) fixed on the outer side of the internal adjustment sliding block (16), an internal movable extrusion groove (18) provided on the inner side of the internal adjustment sliding block (16), a lateral assembly opening (20) provided on the inner side of the obliquely arranged expansion adjustment groove (15), an internal extrusion spring (21) sleeved in the lateral assembly opening (20), obliquely arranged guide grooves (22) provided on the inner walls of the obliquely arranged expansion adjustment grooves (15), and obliquely arranged guide strips (23) fixed on the outer walls of the internal adjustment sliding block (16). The inner side of the internal driving chamber (7) is provided with a plurality of integral structure arc-shaped sealing protrusions (13) arranged in an annular array, and the outer wall of the rotor (6) is provided with a plurality of arc-shaped driving grooves (14) in the internal driving chamber (7). The internal adjustment sliding block (16) is provided with a lateral assembly sliding groove (25) with an embedded roller pin (24) on the side wall near the internal driving blind hole (8).

2. The direct-coupled high-efficiency gerotor hydraulic motor of claim 1, wherein: The outer side of the output shaft (5) is provided with an annular groove (27) with an embedded thrust roller bearing (26) at the opening position of the internal driving blind hole (8) and the outer side of the output shaft (5) away from the opening end of the internal driving blind hole (8).

3. The direct-coupled high-efficiency gerotor hydraulic motor of claim 1, wherein: The inner side of the internal driving blind hole (8) is provided with a lateral oil guide hole (28) in communication with the outer side of the output shaft (5).

4. The direct-coupled high-efficiency gerotor hydraulic motor of claim 1, wherein: The inner side of the lateral shaft tube (10) is provided with an integral structure internal reinforcing rib (29).

5. The direct-coupled high-efficiency gerotor hydraulic motor of claim 1, wherein: The inner side of the arc-shaped driving groove (14) is provided with an internally threaded sunken hole (31) with an embedded lateral limiting bolt (30), the internal center of the rotor (6) is provided with an internal tooth groove hole (32), the outer arc surface of the lateral shaft tube (10) is provided with an integral structure external assembly tooth ring (33) protruding into the internal tooth groove hole (32), the outer arc surface of the lateral shaft tube (10) is provided with an internal positioning through hole (34) matched with the lateral limiting bolt (30), and the lateral limiting bolt (30) is inserted into the internal positioning through hole (34) from the internally threaded sunken hole (31) to control the coaxial fixation of the rotor (6) and the lateral shaft tube (10).

6. A direct coupled high efficiency gerotor hydraulic motor as claimed in claim 5 wherein: The outer limiting sealing sleeve (35) is welded and fixed to the outer end of the lateral limiting bolt (30) in the internally threaded sunken hole (31).

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