阅读说明：本技术 一种单销定位的无级变量柱塞马达 (Single-pin positioning stepless variable plunger motor ) 是由 王金钻 邢彬 孙飞 于 2021-09-28 设计创作，主要内容包括：本发明涉及一种单销定位的无级变量柱塞马达,包括可拆卸连接的壳体和端盖,所述壳体内开设有容置腔,所述容置腔内转动连接有贯穿壳体的主轴,所述容置腔内设有与主轴动力连接的缸体,所述主轴的外侧设有与缸体配合的柱塞,所述柱塞的外伸端球面铰接有滑靴,所述主轴转动连接有壳体弹性连接的第一支撑块,所述第一支撑块球面铰接有与滑靴连接的变量盘,本发明采用与壳体弹性连接的第一支撑块对变量盘进行球面铰接定位,进而通过改变控制腔内油液体积以调整推杆的伸缩,调整变量盘的倾角以及沿主轴的轴向位置,从而对主轴的输出进行无级调整,相较于传统的固定式变量盘和定轴式变量盘,具有更加优异的可变性能和变量空间。(The invention relates to a single-pin positioning stepless variable plunger motor, which comprises a shell and an end cover which are detachably connected, wherein an accommodating cavity is formed in the shell, a main shaft penetrating through the shell is rotatably connected in the accommodating cavity, a cylinder body in power connection with the main shaft is arranged in the accommodating cavity, a plunger matched with the cylinder body is arranged on the outer side of the main shaft, a sliding shoe is hinged to the spherical surface of the extending end of the plunger, the main shaft is rotatably connected with a first supporting block in elastic connection with the shell, and a variable disc connected with the sliding shoe is hinged to the spherical surface of the first supporting block in elastic connection with the shell. Has more excellent variable performance and variable space.)

1. A single-pin positioning stepless variable plunger motor comprises a shell (1) and an end cover (2) which are detachably connected, and is characterized in that a containing cavity (3) is formed in the shell (1), a main shaft (4) penetrating through the shell (1) is rotatably connected in the containing cavity (3), a cylinder body (13) in power connection with the main shaft (4) is arranged in the containing cavity (3), oil ports (23) are formed in two sides of the end cover (2), an oil distributing disc (14) communicated with a plunger (15) and the oil ports (23) is arranged between the cylinder body (13) and the end cover (2), a plunger (15) matched with the cylinder body (13) is arranged on the outer side of the main shaft (4), a sliding shoe (16) is hinged to the spherical surface of an extending end of the plunger (15), a first supporting block (6) elastically connected with the shell (1) is rotatably connected to the main shaft (4), a variable disc (5) connected with the sliding shoe (16) is hinged to the spherical surface of the first supporting block (6), control chamber (7) have all been seted up to holding chamber (3) top and the bottom that deviates from end cover (2) one side inner wall, be equipped with in control chamber (7) and connect and drive push rod (8) of variable disk (5).

2. A single pin positioned infinitely variable piston motor as in claim 1, wherein: the end face of one end of the shell (1) is provided with a counter bore matched with the end cover (2), and the end face of one side of the counter bore is provided with a positioning pin (25) connected with the shell (1) and the end cover (2).

3. A single pin positioned infinitely variable piston motor as in claim 1, wherein: and bearings (24) matched with the shell (1) and the end cover (2) are respectively arranged at two ends of the main shaft (4), and the bearings (24) matched with the end cover (2) are connected with the oil distribution disc (14).

4. A single pin positioned infinitely variable piston motor as in claim 3, wherein: one side that first supporting block (6) deviate from cylinder body (13) is equipped with first spring (12) of cover establishing in main shaft (4) outside, first spring (12) deviate from the one end and bearing (24) cooperation of first supporting block (6).

5. A single pin positioned infinitely variable piston motor as in claim 1, wherein: the extending end of the push rod (8) is hinged with a sliding block (9), and sliding grooves (10) which are connected with the sliding block (9) in a sliding mode are formed in the top and the bottom of the variable disc (5) which deviates from the end face of one side of the cylinder body (13).

6. A single pin positioned infinitely variable piston motor as in claim 1, wherein: one side of the cylinder body (13) departing from the end cover (2) is elastically connected with a second supporting block (18) in sliding connection with the main shaft (4), and the spherical surface of the second supporting block (18) is hinged with a return disc (17) movably connected with the sliding shoes (16).

7. A single pin positioned infinitely variable piston motor as in claim 6, wherein: be equipped with jump ring (20) in the through-hole at cylinder body (13) middle part, one side that jump ring (20) deviate from end cover (2) is equipped with second spring (22), the both ends of second spring (22) are connected with fender ring (21), deviate from end cover (2) one side keep off and be connected with guide arm (19) that run through cylinder body (13) between ring (21) and second supporting shoe (18).

8. A single pin positioned infinitely variable piston motor as in claim 1, wherein: an oil way (11) communicated with the control cavity (7) is processed in the shell (1).

Technical Field

The invention relates to the technical field of hydraulic transmission and control, in particular to a single-pin positioning stepless variable plunger motor.

Background

The hydraulic walking motor is one of the most widely used hydraulic elements in the fields of modern hydraulic transmission and engineering machinery, wherein the walking motor and the speed reducer are commonly used in crawler drive, are very important executing elements of the engineering machinery or other production machinery, and obtain a high-precision product, and the assembly of the product is to ensure whether the product performance can meet the market requirement, so that better service is provided for customers.

At present, the structure of the swash plate type axial plunger pump or the plunger motor in the market mainly comprises a shell, an end cover, a main shaft, two bearings matched with the main shaft and two cylindrical pins connected with the end cover and the shell, and the swash plate type axial plunger pump or the plunger motor mostly has the following defects:

(1) the fixed variable disk cannot adjust input and output, and has high use limitation;

(2) the fixed shaft type variable coils the fixed shaft to rotate within a small angle range, input and output adjustment can be performed, but the control variable range is small, and the use is limited.

(3) The common connection mode of the shell and the end cover is a one-surface two-pin structure, namely, the shell and the end cover are matched through end surfaces and are positioned by two cylindrical pins, the structure is used for many years, positioning and orientation effects of a certain degree can be achieved, in the machining process, the positions of the two cylindrical pins need to have good position degree requirements with a main shaft and a bearing, and the machining strength and the production cost are increased to a certain degree.

Therefore, to solve the above problems, a single pin positioning stepless variable plunger motor is proposed.

Disclosure of Invention

The invention aims to provide a single-pin positioning stepless variable plunger motor to solve the specific problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a stepless variable plunger motor of single round pin location, is including dismantling casing and the end cover of connection, the holding chamber has been seted up in the casing, the holding intracavity rotates and is connected with the main shaft that runs through the casing, the holding intracavity is equipped with the cylinder body of being connected with main shaft power, the hydraulic fluid port has been seted up to the both sides of end cover, be equipped with the branch oil pan of intercommunication plunger and hydraulic fluid port between cylinder body and the end cover, the outside of main shaft be equipped with cylinder body complex plunger, the overhanging end sphere of plunger articulates there is the piston shoe, the main shaft rotates and is connected with casing elastic connection's first supporting block, first supporting block sphere articulates there is the variable dish of being connected with the piston shoe, the control chamber has all been seted up from top and the bottom of end cover one side inner wall in the holding chamber, the control intracavity is equipped with the push rod of connecting and driving the variable dish.

Preferably, the end face of one end of the shell is provided with a counter bore matched with the end cover, and the end face of one side of the counter bore is provided with a positioning pin for connecting the shell and the end cover.

Preferably, two ends of the main shaft are respectively provided with a bearing matched with the shell and the end cover, and the bearing matched with the end cover is connected with the oil distribution disc.

Preferably, one side that first supporting block deviates from the cylinder body is equipped with the first spring of cover establishing in the main shaft outside, the one end and the bearing cooperation that first spring deviates from first supporting block.

Preferably, the overhanging end of the push rod is hinged with a sliding block, and sliding grooves which are connected with the sliding block in a sliding mode are formed in the top and the bottom of the end face, which is far away from one side of the cylinder body, of the variable disc.

Preferably, one side of the cylinder body, which is far away from the end cover, is elastically connected with a second supporting block in sliding connection with the main shaft, and the spherical surface of the second supporting block is hinged with a return disc movably connected with the sliding shoe.

Preferably, a clamp spring is arranged in a through hole in the middle of the cylinder body, a second spring is arranged on one side, away from the end cover, of the clamp spring, two ends of the second spring are connected with baffle rings, and a guide rod penetrating through the cylinder body is connected between the baffle ring and the second supporting block on one side, away from the end cover.

Preferably, an oil path communicated with the control cavity is processed in the shell.

The invention has at least the following beneficial effects:

1. the variable disc is positioned in a spherical hinged mode by the aid of the first supporting block which is elastically connected with the shell, and the volume of oil in the control cavity is changed to adjust the extension and retraction of the push rod, so that the inclination angle and the axial position of the variable disc along the main shaft are adjusted, and the output of the main shaft is adjusted in a stepless mode;

2. according to the invention, the push rod is matched with the control cavity, the oil way is processed in the shell 1 to form a telescopic adjustable hydraulic cylinder structure, and the slide block hinged with the push rod is matched with the slide grooves at two ends of the variable disk, so that when the variable disk is driven by the push rod to stretch and retract to adjust the inclination angle, the inclination angle change of the variable disk can be self-adapted, the structure is more stable, and the disassembly, assembly and maintenance are convenient;

3. the end cover positioning device adopts the counter bore to position the assembly of the end cover and the shell, and carries out single-pin positioning on the end cover through the positioning pin, compared with the traditional double-cylindrical-pin positioning, the position degree requirement in the processing process is reduced, the end cover can be positioned more accurately, and the assembly precision is effectively improved.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded schematic view of the present invention;

FIG. 3 is a front sectional structural view of the present invention;

fig. 4 is a schematic top sectional structure view of the present invention.

In the reference symbols: 1. a housing; 2. an end cap; 3. an accommodating cavity; 4. a main shaft; 5. a variable disc; 6. a first support block; 7. a control chamber; 8. a push rod; 9. a slider; 10. a chute; 11. an oil path; 12. a first spring; 13. a cylinder body; 14. an oil distributing disc; 15. a plunger; 16. a slipper; 17. a return disk; 18. a second support block; 19. a guide bar; 20. a clamp spring; 21. a baffle ring; 22. a second spring; 23. an oil port; 24. a bearing; 25. and a positioning pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-4, the present invention provides a technical solution: a single-pin positioning stepless variable plunger motor comprises a shell 1 and an end cover 2 which are detachably connected, concretely, the shell 1 is connected with the end cover 2 through a bolt, a containing cavity 3 is arranged in the shell 1, a spindle 4 penetrating through the shell 1 is rotationally connected in the containing cavity 3, a cylinder body 13 in power connection with the spindle 4 is arranged in the containing cavity 3, concretely, a step-shaped through hole is arranged in the middle of the cylinder body 13, a spline is etched at one end of the through hole, which is far away from the end cover 2, the spindle 4 is in spline fit with the cylinder body 13, oil ports 23 are arranged on two sides of the end cover 2, an oil distribution disc 14 communicating the plunger 15 with the oil ports 23 is arranged between the cylinder body 13 and the end cover 2, concretely, two arc-shaped through holes which are symmetrically distributed are arranged on the end face of the oil distribution disc 14, the two through holes are respectively communicated with the oil ports 23 on two sides of the end cover 2 correspondingly, the plunger 15 matched with the cylinder body 13 is arranged on the outer side of the spindle 4, concretely, the plunger 15 is provided with a plurality of plungers, the plungers are distributed on the outer side of the main shaft 4 in an annular mode, the outer side of the cylinder body 13 is provided with a hydraulic oil cavity matched with a hole shaft of the plunger 15, the spherical surface of the extending end of the plunger 15 is hinged with a sliding shoe 16, the main shaft 4 is rotatably connected with a first supporting block 6 elastically connected with the shell 1, specifically, the first supporting block 6 is matched with the hole shaft of the main shaft 4, the spherical surface of the first supporting block 6 is hinged with a variable disc 5 connected with the sliding shoe 16, specifically, the outer wall of the first supporting block 6 is processed with an outer spherical surface, the middle part of the variable disc 5 is provided with a through hole with the inner diameter larger than the outer diameter of the main shaft 4, the inner wall of the through hole is provided with an inner spherical surface attached to the outer spherical surface of the first supporting block 6, the end surface of one side, close to the cylinder body 13, of the variable disc 5 is attached to the end surface, far away from the cylinder body 13, the top and the bottom of the inner wall of one side, far away from the end cover 2, of the accommodating cavity 3 are respectively provided with a control cavity 7, a push rod 8 connected with and driving the variable disc 5 is arranged in the control cavity 7, concretely, push rod 8 and the cooperation of the 7 shaft holes in control chamber, and push rod 8 and the cooperation of control chamber 7 form telescopic pneumatic cylinder structure, can carry out whole encapsulation through casing 1 and the cooperation of end cover 2, by 4 power connection cylinder bodies 13 of main shaft, and carry out sphere articulated location to variable disk 5 through the first supporting block 6 with casing 1 elastic connection, and then through changing the flexible of fluid volume in the control chamber 7 in order to adjust push rod 8, adjust the inclination of variable disk 5 and along the axial position of main shaft 4, thereby carry out stepless adjustment to the output of main shaft 4, compare in traditional fixed variable disk and fixed shaft formula variable disk, have more excellent variable performance and variable space, application scope is wider, and compact structure, stability is higher.

Wherein, the counter bore with end cover 2 complex is seted up to the terminal surface of casing 1 one end, and the terminal surface of counter bore one side is equipped with the locating pin 25 of connecting casing 1 and end cover 2, can fix a position the assembly of end cover 2 with casing 1 through the counter bore to further connect end cover 2 and casing 1 by locating pin 25, and then fix a position more accurately end cover 2, improve the assembly precision effectively.

Wherein, the both ends of main shaft 4 are equipped with respectively with casing 1 and end cover 2 complex bearing 24, with end cover 2 complex bearing 24 with divide oil pan 14 to be connected, specifically, divide oil pan 14 and the 24 hole axle cooperations of bearing, can carry out slewing support to main shaft 4 through bearing 24 to divide oil pan 14 to fix a position through the bearing 24 with end cover 2 complex.

Wherein, one side that first supporting block 6 deviates from cylinder body 13 is equipped with the first spring 12 that the cover was established in the main shaft 4 outside, and first spring 12 deviates from the one end and the bearing 24 cooperation of first supporting block 6, and is concrete, and first spring 12 is located between first supporting block 6 and main shaft 4 and the 1 complex bearing 24 of casing, can carry out elastic support to first supporting block 6 through first spring 12.

Wherein, the overhanging end of push rod 8 articulates there is slider 9, and is concrete, and the overhanging end of push rod 8 adopts the ball pivot or articulate through the round pin axle with slider 9, and variable dish 5 deviates from 13 side end of cylinder body's top and bottom all offer with slider 9 sliding connection's spout 10, can cooperate through slider 9 and spout 10, and the overhanging drive variable dish 5's of self-adaptation push rod inclination is adjusted, and the structure is more stable.

An oil way 11 communicated with the control cavity 7 is processed in the shell 1, so that hydraulic oil can be injected into the control cavity 7 through the oil way 11, and the extending length of the push rod 8 is adjusted.

Example 2

Referring to fig. 2-4, the difference between the embodiments 1 is: one side elastic connection that cylinder body 13 deviates from end cover 2 has the second supporting shoe 18 with 4 sliding connection of main shaft, specifically, the middle part processing of second supporting shoe 18 has the spline hole with 4 spline fits of main shaft, second supporting shoe 18 sphere articulates there is the return stroke dish 17 with piston shoe 16 swing joint, specifically, the through-hole that corresponds with piston shoe 16 is seted up to the terminal surface of return stroke dish 17, and piston shoe 16 centre gripping is between return stroke dish 17 and variable dish 5, and then articulated location is carried out to return stroke dish 17 through second supporting shoe 18, and carry on spacingly by return stroke dish 17 to piston shoe 16.

Wherein, a clamp spring 20 is arranged in a through hole in the middle of the cylinder body 13, specifically, an annular groove matched with the clamp spring 20 is arranged on the inner wall of the through hole, a second spring 22 is arranged on one side of the clamp spring 20, which is far away from the end cover 2, a baffle ring 21 is connected with two ends of the second spring 22, a guide rod 19 penetrating through the cylinder body 13 is connected between the baffle ring 21 on one side of the end cover 2 and the second supporting block 18, specifically, a plurality of guide rods 19 are arranged on the guide rod 19, the guide rods 19 are annularly distributed on the outer side of the main shaft 4 and matched with part of shaft holes of the main shaft 4 in spline fit with the cylinder body 13, a counter bore matched with the guide rod 19 is arranged on the end surface of one side of the second supporting block 18, the other end of the guide rod 19 is contacted with the baffle ring 21 on one side of the end cover 2, the second spring 22 can be matched with the baffle ring 21, the second supporting block 18 is elastically supported by the guide rod 19, and further elastically supports the return stroke disc 17, and then guarantee return stroke dish 17 and variable disk 5 closely cooperate, protect piston shoes 16, the structure is more stable.

The working principle is as follows:

finish machining is carried out on a counter bore and an end face of the end cover 2 matched with the shell 1, positioning and assembling are carried out through a positioning pin 25, oil ports 23 on two sides of the end cover 2 are connected into a high-pressure oil loop after assembling is finished, circulating high-pressure oil is injected into the cylinder body 13 through an oil distribution disc 14, a piston shoe 16 is guided through a variable disc 5, and the cylinder body 13 is driven by reciprocating telescopic motion of a plunger 15 to drive a main shaft 4 to rotate;

or, the two hydraulic oil loops are connected through the oil ports 23, the main shaft 4 is connected with the driving shaft, the main shaft 4 is driven to rotate through the driving shaft, the cylinder body 13 is driven to drive the plunger 15 to rotate, the piston shoes 16 are guided through the variable disc 5, negative pressure and positive pressure are formed by the reciprocating extension and contraction movement of the plunger 15, and hydraulic oil is sucked in through the oil port 23 on one side and pumped out through the oil port 23 on the other side;

in the working process, the first supporting block 6 is elastically supported by the first spring 12 matched with the bearing 24, and the variable disc 5 is spherically hinged and positioned by the first supporting block 6, so that hydraulic oil entering the control cavity 7 can be regulated by the oil way 11, the volume of the oil in the control cavity 7 is further changed to regulate the extension and retraction of the push rod 8, the inclination angle of the variable disc 5 and the axial position along the main shaft 4 are regulated, and the output of the main shaft 4 is regulated in a stepless manner, so that compared with the traditional fixed variable disc and fixed shaft type variable disc, the variable disc has more excellent variable performance and variable space, wider application range, compact structure and higher stability;

in addition, in the adjusting process of the variable disc 5, the baffle ring 21 is matched with the second spring 22, the guide rod 19 is used for elastically supporting the second supporting block 18, and further the return disc 17 is elastically supported, so that the return disc 17 is tightly matched with the variable disc 5, the slipper 16 is protected, and the structure is more stable.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

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.