阅读说明：本技术 一种可控制行程距离的油缸 (Oil cylinder capable of controlling stroke distance ) 是由 不公告发明人 于 2019-10-28 设计创作，主要内容包括：本发明公开了一种可控制行程距离的油缸,包括两端设有开口的缸体,所述缸体的左端开口处固定安装有左端盖、右端开口处固定安装有右端盖；所述缸体内滑动连接有活塞体,所述活塞体上设有穿过右端盖的活塞杆,所述活塞杆滑动连接在所述右端盖上；所述缸体的侧面设有第一油口和第二油口；左端盖和右端盖之间固定设有限位滑杆；所述活塞体的左端中心位置设有轴孔；左端盖的中心位置转动连接有转轴,所述轴孔的内设有螺旋槽,转轴设有伸入所述螺旋槽内的凸柱,所述转轴的左端固定安装有传动齿轮,左端盖的左侧设有行程调节组件；该可控制行程距离的油缸,不仅结构简单,而且可以控制油缸伸出后向内缩回的行程和油缸全部缩回后向外伸出的行程。(The invention discloses an oil cylinder with a controllable stroke distance, which comprises a cylinder body, wherein two ends of the cylinder body are provided with openings, a left end cover is fixedly arranged at the opening at the left end of the cylinder body, and a right end cover is fixedly arranged at the opening at the right end of the cylinder body; a piston body is connected in the cylinder body in a sliding manner, a piston rod penetrating through the right end cover is arranged on the piston body, and the piston rod is connected to the right end cover in a sliding manner; a first oil port and a second oil port are formed in the side face of the cylinder body; a limiting slide rod is fixedly arranged between the left end cover and the right end cover; the center of the left end of the piston body is provided with a shaft hole; the center of the left end cover is rotatably connected with a rotating shaft, a spiral groove is arranged in the shaft hole, the rotating shaft is provided with a convex column extending into the spiral groove, a transmission gear is fixedly installed at the left end of the rotating shaft, and a stroke adjusting assembly is arranged at the left side of the left end cover; the oil cylinder with the controllable stroke distance not only has simple structure, but also can control the stroke of the oil cylinder which retracts inwards after extending and the stroke of the oil cylinder which extends outwards after all the oil cylinder retracts.)

1. An oil cylinder with a controllable stroke distance comprises a cylinder body with openings at two ends, wherein a left end cover is fixedly arranged at the opening at the left end of the cylinder body, and a right end cover is fixedly arranged at the opening at the right end of the cylinder body; a piston body is connected in the cylinder body in a sliding manner, a piston rod penetrating through the right end cover is arranged on the piston body, and the piston rod is connected to the right end cover in a sliding manner; a rodless cavity is formed between the piston body and the left end cover in the cylinder body, and a rod cavity is formed between the piston body and the right end cover; a first oil port communicated with the rodless cavity and a second oil port communicated with the rod cavity are formed in the side face of the cylinder body; the piston is characterized in that a limiting slide rod is fixedly arranged between the left end cover and the right end cover, and the piston body is connected with the limiting slide rod in a sliding manner; the center position of the left end of the piston body is provided with a shaft hole which extends to the right into the piston rod; the central point of left end cover puts to rotate and is connected with the pivot that the right-hand member stretched into in the shaft hole, be equipped with the helicla flute along its axial on the interior circumference lateral wall in shaft hole, the pivot is equipped with near its right-hand member's circumference side and stretches into the projection in the helicla flute, the left end fixed mounting of pivot has drive gear, the left side of left end cover is equipped with stroke adjusting part, stroke adjusting part is used for controlling the pivot rotatory number of turns under the effect of helicla flute and projection with the drive gear cooperation.

2. The oil cylinder with the controllable stroke distance according to claim 1, wherein the stroke adjusting component comprises a positioning disc and an inner gear ring, the positioning disc is fixedly installed on the left end face of the left end cover, the positioning disc is provided with a gear avoiding groove on the end face facing the left end cover, and an annular rotating groove communicated with the gear avoiding groove, the transmission gear is located in the gear avoiding groove, and the inner gear ring is rotatably connected in the annular rotating groove and meshed with the transmission gear; the positioning disc is provided with a stroke window communicated with the annular rotary groove, the inner gear ring is provided with a positioning rod penetrating through the stroke window, and the positioning disc is provided with a stroke positioning assembly used for controlling the movement range of the positioning rod in the stroke window.

3. The oil cylinder capable of controlling the stroke distance according to claim 2, wherein the stroke positioning assembly comprises a control disc and a positioning spring, a positioning gear extends leftwards from the left end of the positioning disc, a positioning shaft extends leftwards from the center of the left end of the positioning gear, a positioning tooth socket matched with the positioning gear is arranged on the end surface of the control disc facing the positioning disc, a spring groove coaxial with the positioning tooth socket is arranged at the left end of the control disc, a positioning shaft hole for communicating the spring groove with the positioning tooth socket is arranged in the control disc, the positioning shaft penetrates through the shaft hole and extends into the spring groove, and a spring seat is fixed at the left end of the positioning shaft; the positioning spring is positioned in the spring groove and is sleeved on the positioning shaft; one end of the positioning spring is abutted against the spring seat, and the other end of the positioning spring is abutted against the spring groove and is used for forcing the control disc to move towards the direction of the positioning disc; and the control panel is provided with a control window for the positioning rod to extend into.

4. The oil cylinder with the controllable stroke distance according to claim 3, wherein the spring seat is provided with a threaded column, and the left end of the positioning shaft is provided with a threaded hole connected with the threaded column.

5. The cylinder with the controllable stroke distance as claimed in claim 1, wherein a first annular groove is formed on the circumferential side surface of the piston body, and a first sealing ring is arranged in the first annular groove.

6. The cylinder with the controllable stroke distance as claimed in claim 1, wherein a second annular groove is formed on an inner circumferential side wall of the slide hole where the right end cover is slidably connected with the piston rod, and a second sealing ring is arranged in the second annular groove.

Technical Field

The invention belongs to the technical field of oil cylinders, and particularly relates to an oil cylinder with a controllable stroke distance.

Background

The hydraulic cylinder is a linear motion type actuating element commonly used in a hydraulic system and is mainly divided into a piston type, a plunger type and a telescopic type according to different structural modes. The oil cylinder has simple structure, reliable work and wide application, and is directly connected with the working mechanism. The stroke and the installation distance of the oil cylinder are one of important parameters in the design work of the whole mechanism. However, in the actual use process, customers sometimes need the stroke and the installation distance of the oil cylinder to be adjustable, and the transmission of the mechanism can be realized within a certain range. Even some host operating mechanisms need to dynamically adjust the stroke and the installation distance of the oil cylinder in the debugging or working process. The stroke and the installation distance of the common oil cylinder are fixed and cannot be adjusted; in the prior art, some oil cylinders capable of adjusting strokes exist in the center, but most of the oil cylinders need to be fixed on a piston rod in a clamping manner, so that the piston rod is damaged to some extent and is not beneficial to oil sealing; and the scheme can only control the stroke of the oil cylinder when the oil cylinder extends to the longest length and retracts backwards, and has limitation in use.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide an oil cylinder with a controllable stroke distance, which not only has a simple structure, but also can control the inward retracting stroke of the oil cylinder after the oil cylinder extends out and the outward extending stroke of the oil cylinder after the oil cylinder is completely retracted, thereby increasing the practicability of the oil cylinder.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: an oil cylinder with a controllable stroke distance comprises a cylinder body with openings at two ends, wherein a left end cover is fixedly arranged at the opening at the left end of the cylinder body, and a right end cover is fixedly arranged at the opening at the right end of the cylinder body; a piston body is connected in the cylinder body in a sliding manner, a piston rod penetrating through the right end cover is arranged on the piston body, and the piston rod is connected to the right end cover in a sliding manner; a rodless cavity is formed between the piston body and the left end cover in the cylinder body, and a rod cavity is formed between the piston body and the right end cover; a first oil port communicated with the rodless cavity and a second oil port communicated with the rod cavity are formed in the side face of the cylinder body; a limiting slide rod is fixedly arranged between the left end cover and the right end cover, and the piston body is in sliding connection with the limiting slide rod; the center position of the left end of the piston body is provided with a shaft hole which extends to the right into the piston rod; the central point of left end cover puts to rotate and is connected with the pivot that the right-hand member stretched into in the shaft hole, be equipped with the helicla flute along its axial on the interior circumference lateral wall in shaft hole, the pivot is equipped with near its right-hand member's circumference side and stretches into the projection in the helicla flute, the left end fixed mounting of pivot has drive gear, the left side of left end cover is equipped with stroke adjusting part, stroke adjusting part is used for controlling the pivot rotatory number of turns under the effect of helicla flute and projection with the drive gear cooperation.

According to the technical scheme, when pressure oil enters the rodless cavity from the first oil port to push the piston body and the piston rod to extend out of the right end cover, the oil in the rod cavity is discharged from the second oil port; when pressure oil enters the rod cavity from the second oil port to push the piston body and the piston rod to retract into the cylinder body, the oil in the rodless cavity is discharged from the first oil port; when the piston rod extends out of or retracts into the cylinder body, the rotating shaft is driven to rotate through the matching of the spiral groove and the convex column, and the transmission gear is driven to rotate when the rotating shaft rotates; the stroke distance of the piston rod can be adjusted by controlling the number of the rotation turns of the rotating shaft. When the piston rod fully extends out of or retracts into the cylinder body, the rotating shaft can freely rotate without influencing the extension and retraction of the piston rod; when the stroke of the oil cylinder needs to be adjusted, the number of turns of the rotating shaft rotating under the action of the spiral groove and the convex column is controlled through the matching of the stroke adjusting assembly and the transmission gear, so that the piston rod stops moving under the action of the rotating shaft when extending out of or retracting into the cylinder body to reach the required stroke distance, and the adjustment of the stroke of the oil cylinder is realized.

In a further technical scheme, the stroke adjusting assembly comprises a positioning disc and an inner gear ring, the positioning disc is fixedly mounted on the left end face of the left end cover, a gear avoiding groove and an annular rotating groove communicated with the gear avoiding groove are formed in the end face, facing the left end cover, of the positioning disc, the transmission gear is located in the gear avoiding groove, and the inner gear ring is rotatably connected in the annular rotating groove and meshed with the transmission gear; the positioning disc is provided with a stroke window communicated with the annular rotary groove, the inner gear ring is provided with a positioning rod penetrating through the stroke window, and the positioning disc is provided with a stroke positioning assembly used for controlling the movement range of the positioning rod in the stroke window.

Through the technical scheme, the inner gear ring is driven to rotate when the transmission gear rotates, and the positioning rod is driven to move in the stroke window when the inner gear ring rotates; the stroke distance of the oil cylinder can be adjusted by controlling the movement range of the positioning rod in the stroke window.

In a further technical scheme, the stroke positioning assembly comprises a control disc and a positioning spring, a positioning gear extends leftwards from the left end of the positioning disc, a positioning shaft extends leftwards from the center of the left end of the positioning gear, a positioning tooth groove matched with the positioning gear is formed in the end face, facing the positioning disc, of the control disc, a spring groove coaxial with the positioning tooth groove is formed in the left end of the control disc, a positioning shaft hole used for communicating the spring groove with the positioning tooth groove is formed in the control disc, the positioning shaft penetrates through the shaft hole and extends into the spring groove, and a spring seat is fixed at the left end of the positioning shaft; the positioning spring is positioned in the spring groove and is sleeved on the positioning shaft; one end of the positioning spring is abutted against the spring seat, and the other end of the positioning spring is abutted against the spring groove and is used for forcing the control disc to move towards the direction of the positioning disc; and the control panel is provided with a control window for the positioning rod to extend into.

Through the technical scheme, when the stroke positioning assembly works, the control disc is pulled along the axial direction of the positioning shaft to compress the positioning spring, so that the positioning gear is separated from the positioning tooth groove, then the control disc is rotated to adjust the overlapping range of the control window and the stroke window, then the control disc is loosened, so that the control disc is pressed to the positioning disc under the action of the positioning spring, and the positioning gear is inserted into the positioning tooth groove to adjust the movement range of the positioning rod in the stroke window.

In a further technical scheme, a threaded column is arranged on the spring seat, and a threaded hole connected with the threaded column is formed in the left end of the positioning shaft.

In a further technical scheme, a first annular groove is formed in the circumferential side face of the piston body, and a first sealing ring is arranged in the first annular groove.

In a further technical scheme, a second annular groove is formed in the inner circumferential side wall of the sliding hole, which is connected with the right end cover in a sliding mode, of the piston rod, and a second sealing ring is arranged in the second annular groove.

(III) advantageous effects

Compared with the prior art, the technical scheme of the invention has the following advantages:

(1) by the design that the control window can rotate clockwise and anticlockwise, the stroke of the oil cylinder which retracts inwards after extending and the stroke of the oil cylinder which extends outwards after all the oil cylinder retracts can be controlled, and the practicability of the oil cylinder is improved;

(2) the length of the stroke window is adjusted through the adjusting control disc to control the stroke of the oil cylinder, so that the adjustment is convenient and can be adjusted at any time;

(3) the piston rod is not damaged because the positioner is not tightly arranged on the piston rod.

Drawings

FIGS. 1-4 are block diagrams of the present invention;

FIG. 5 is a structural cross-sectional view of a control panel portion of the present invention;

FIG. 6 is a sectional view of the internal structure of the present invention;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 1;

FIGS. 8-9 are exploded views of the present invention;

FIGS. 10-11 are block diagrams of the control panel of the present invention;

fig. 12-14 are structural views of a piston rod and piston body of the present invention;

fig. 15-16 are block diagrams of pucks according to the present invention.

Detailed Description

Referring to fig. 1 to 16, an oil cylinder capable of controlling a stroke distance includes a cylinder body 12 having openings at two ends, a left end cover 3 is fixedly installed at the left end opening of the cylinder body 12, and a right end cover 10 is fixedly installed at the right end opening; a piston body 101 is connected in the cylinder body 12 in a sliding manner, a piston rod 102 penetrating through the right end cover 10 is arranged on the piston body 101, and the piston rod 102 is connected to the right end cover 10 in a sliding manner; a rodless cavity 1a is formed between the piston body 101 and the left end cover 3, and a rod cavity 1b is formed between the piston body 101 and the right end cover 10 in the cylinder body 12; a first oil port 121 communicated with the rodless cavity 1a and a second oil port 122 communicated with the rod cavity 1b are formed in the side surface of the cylinder body 12; a limiting slide rod 9 is fixedly arranged between the left end cover 3 and the right end cover 10, and the piston body 101 is in sliding connection with the limiting slide rod 9; a shaft hole 103 extending to the right into the piston rod 102 is formed in the center of the left end of the piston body 101; the center position of left end cover 3 rotates and is connected with pivot 2 that the right-hand member stretched into in shaft hole 103, be equipped with spiral groove 104 along its axial on the interior circumference lateral wall of shaft hole 103, pivot 2 is equipped with the projection 11 of stretching into in the spiral groove 104 in the circumference side of being close to its right-hand member, the left end fixed mounting of pivot 2 has drive gear 13, the left side of left end cover 3 is equipped with stroke adjusting part, stroke adjusting part is used for controlling the number of turns that pivot 2 rotated under spiral groove 104 and projection 11's effect with the cooperation of drive gear 13.

The stroke adjusting assembly comprises a positioning disc 5 and an inner gear ring 4, the positioning disc 5 is fixedly installed on the left end face of the left end cover 3, a gear avoiding groove 5c and an annular rotary groove 5d communicated with the gear avoiding groove 5c are formed in the end face, facing the left end cover 3, of the positioning disc 5, the transmission gear 13 is located in the gear avoiding groove 5c, and the inner gear ring 4 is rotatably connected in the annular rotary groove 5d and meshed with the transmission gear 13; the positioning disc 5 is provided with a stroke window 5a communicated with the annular rotating groove 5d, the inner gear ring 4 is provided with a positioning rod 14 penetrating through the stroke window 5a, and the positioning disc 5 is provided with a stroke positioning assembly used for controlling the movement range of the positioning rod 14 in the stroke window 5 a.

The stroke positioning assembly comprises a control disc 6 and a positioning spring 7, a positioning gear 5b extends leftwards from the left end of the positioning disc 5, a positioning shaft 5b1 extends leftwards from the center of the left end of the positioning gear 5b, a positioning tooth groove 6a matched with the positioning gear 5b is formed in the end face, facing the positioning disc 5, of the control disc 6, a spring groove 6f coaxial with the positioning tooth groove 6a is formed in the left end of the control disc 6, a positioning shaft hole 6g used for communicating the spring groove 6f with the positioning tooth groove 6a is formed in the control disc 6, the positioning shaft 5b1 penetrates through the positioning shaft hole 6g and extends into the spring groove 6f, and a spring seat 8 is fixed to the left end of the positioning shaft 5b 1; the positioning spring 7 is positioned in the spring groove 6f and is sleeved on the positioning shaft 5b 1; one end of the positioning spring 7 props against the spring seat 8, and the other end of the positioning spring props against the spring groove 6f and is used for forcing the control disc 6 to move towards the positioning disc 5; the control panel 6 is provided with a control window 6b for the positioning rod 14 to extend into.

The spring seat 8 is provided with a threaded column 8a, and the left end of the positioning shaft 5b1 is provided with a threaded hole 5b2 connected with the threaded column 8 a. A first annular groove 108 is formed on the circumferential side surface of the piston body 101, and a first seal ring 30 is provided in the first annular groove 108. A second annular groove 109 is formed in the inner circumferential side wall of the slide hole where the right end cover 10 is slidably connected with the piston rod 102, and a second sealing ring 31 is arranged in the second annular groove 109.

When the oil cylinder with the controllable stroke distance works, the first oil port 121 and the second oil port 122 of the oil cylinder can be connected with a system pipeline. When pressure oil enters the rodless chamber 1a from the first oil port 121 to push the piston body 101 and the piston rod 102 to extend from the right end cover 10, the oil in the rod chamber 1b is discharged from the second oil port 122; when pressure oil enters the rod chamber 1b from the second oil port 122 to push the piston body 101 and the piston rod 102 to retract into the cylinder 12, the oil in the rod-less chamber 1a is discharged from the first oil port 121; when the piston rod 102 extends out of or retracts into the cylinder body 12, the spiral groove 104 is matched with the convex column 11 to drive the rotating shaft 2 to rotate, and the rotating shaft 2 drives the transmission gear 13 to rotate when rotating; when the transmission gear 13 rotates, the inner gear ring 4 is driven to rotate, and then the positioning rod 14 on the inner gear ring 4 is driven to move in the stroke window 5a and the control window 6 b; the distance of extension or retraction of the piston rod 102 into the cylinder 12 is adjusted by controlling the overlapping range of the stroke window 5a and the control window 6 b.

When the full-stroke work is carried out, the control disc 6 is pulled along the axial direction of the positioning shaft 5b1 to compress the positioning spring 7, so that the positioning gear 5b is separated from the positioning tooth groove 6a, then the control disc 6 is rotated to adjust the overlapping range of the control window 6b and the stroke window 5a, so that all the stroke windows 5a are leaked from the control window 6b, then the control disc 6 is released, so that the control disc 6 is pressed to the positioning disc 5 under the action of the positioning spring 7, and the positioning gear 5b is inserted into the positioning tooth groove 6 a. The first oil port 121 is filled with oil, the piston rod 102 is pushed out, due to the sliding fit of the spiral groove 104 and the convex column 11, the piston rod 102 can drive the rotating shaft 2 to enable the transmission gear 13 to rotate in the pushing-out process, due to the engagement of the transmission gear 13 and the inner gear ring 4, the transmission gear 13 drives the inner gear ring 4 to rotate, the positioning rod 14 is driven to slide in the stroke window 5a, due to the fact that the stroke window 5a is completely leaked at the moment, the piston rod 102 can be completely extended out to achieve the full stroke, and in the same way, when the second oil port 122 is filled with oil, the oil.

When the hydro-cylinder stroke needs to be adjusted, the axial pulling control disc 6 along the positioning shaft 5b1 compresses the positioning spring 7, so that the positioning gear 5b is separated from the positioning tooth groove 6a, then the control disc 6 is rotated to adjust the overlapping range of the control window 6b and the stroke window 5a, and the control window 6b shields a part of the stroke window 5a, thereby reducing the moving distance of the positioning rod 14, and realizing the purpose of controlling the stroke of the hydro-cylinder, specifically: when the control panel 6 rotates clockwise, the control cylinder stretches out the length of stroke under the state of full retraction, and it is rotatory more, the stroke is shorter, when control panel 6 anticlockwise rotates, the control cylinder retracts the length of stroke under the state of full extension, and it is rotatory more, the stroke is shorter more to realized the adjustable of stroke under two kinds of operating condition of hydro-cylinder, increased the practicality of hydro-cylinder, and the adjustment method is simple easily mastered, facilitates the use.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.