CN218581943U - Two-section guide oil cylinder with high precision and adjustable rigidity limit - Google Patents

Abstract

The utility model provides a double-section guide oil cylinder with high precision and adjustable rigidity limit, which comprises a cylinder body; a primary piston portion and an auxiliary piston portion; the rigid limit nut is sleeved between the main piston part and the inner wall of the cylinder body, and the sawtooth-shaped threads on the outer peripheral ring of the rigid limit nut are meshed with the internal threads of the cylinder body; the adjusting gear is arranged on the top of the rigid limiting nut and is positioned on the outer peripheral ring of the main piston part; the power assembly is arranged at one end close to the flange surface of the cylinder body and is meshed with the adjusting gear to drive the adjusting gear to rotate forwards and reversely; the tight jar equipartition in clearance top that disappears of tight subassembly in clearance top is on the main cylinder flange, and the tight jar piston top in clearance top that disappears supports establishes on adjusting gear lower surface. The utility model adopts the structure that two oil cylinders are matched with two pistons, the stroke is increased, the guide length of the piston is improved when the oil cylinder does work, and the anti-unbalance loading capacity of the oil cylinder is improved; the rigid limit nut realizes the repeated positioning precision of the upper dead point; the anti-backlash oil cylinder prolongs the service life of the rigid nut and the oil cylinder.

Description

Two-section guide oil cylinder with high precision and adjustable rigidity limit

Technical Field

The utility model belongs to the technical field of the hydro-cylinder technique and specifically relates to a two festival direction hydro-cylinders with high accuracy and adjustable rigidity are spacing.

Background

When the oil cylinder is used, if the piston part and the cylinder opening part are used as piston guide, the piston stroke is larger, the actual guide distance of the piston is shorter, and the piston does work at a position with a larger piston stroke, so that the problem that the eccentric load resistance of the cylinder body is insufficient due to the shorter piston guide length when the piston does work occurs.

In the existing common oil cylinder, the stroke cannot be adjusted through the mechanism of the oil cylinder according to the actual use requirement, and the accurate dead point resetting function of the large-cylinder-diameter oil cylinder cannot be realized even if an electric control technology is utilized;

in addition, stop nut has the dead weight, about 200KG, stop nut can fall down naturally because of the reason of dead weight, the last mating surface of screw can throw off promptly, when the stop nut lower extreme received the power of hydro-cylinder terminal surface, the nut can go upward this moment because last mating surface will have one displacement from bottom to top that is thrown off, the in-process will have the impact, constantly can appear the meshing promptly, break away from, the process that the meshing breaks away from again, therefore, the piston is reaching the spacing in-process of top dead center in the course of the work, rigidity stop nut can produce a large amount of impact load with cylinder body screw portion, thereby influence the life-span of screw portion.

Disclosure of Invention

In view of the foregoing prior art shortcoming, an object of the utility model is to provide a two-section direction hydro-cylinder with high accuracy and adjustable rigidity are spacing, increase the function that an adjustable rigidity limit structure guaranteed repeated positioning in the hydro-cylinder, and guarantee spacing precision through the accurate control to rigidity limit structure, adopt two-section structure that increase auxiliary piston at the piston afterbody to increase as the stroke is longer and direction length increases thereupon, direction length's increase just can guarantee to have sufficient anti unbalance loading ability when the acting of stroke dead point, a difficult point for solving prior art.

In order to achieve the above objects and other related objects, the utility model provides a two-section direction hydro-cylinder with high accuracy and adjustable rigidity are spacing, include:

a cylinder body 1;

the piston comprises a main piston part 2 and an auxiliary piston part 3, wherein the main piston part 2 and the auxiliary piston part 3 are integrally arranged in an inner cavity of a cylinder body 1 from top to bottom to move up and down;

the rigid limiting nut 4 is sleeved between the main piston part 2 and the inner wall of the cylinder body 1, and a sawtooth thread 5 on an outer peripheral ring of the rigid limiting nut 4 is meshed with an inner thread of the cylinder body 1;

the adjusting gear 6 is arranged on the top of the rigid limiting nut 4 and is positioned on the outer peripheral ring of the main piston part 2;

the power assembly is arranged at one end close to the flange surface of the cylinder body 1 and is meshed with the adjusting gear 6 to drive the adjusting gear 6 to rotate positively and negatively;

the anti-backlash jacking assembly is characterized in that anti-backlash jacking cylinders 16 of the anti-backlash jacking assembly are uniformly distributed on a flange of the cylinder body 1, and the tops of anti-backlash jacking cylinder pistons 7 of the anti-backlash jacking assembly are abutted to the lower surface of the adjusting gear 6.

According to preferred scheme, 1 open-top bottom of cylinder body seals, and inside forms the cavity, and open-top inner wall is provided with zigzag screw thread 5, and the oil circuit has been seted up to the bottom side.

According to the preferred scheme, the top of the rigid limit nut 4 is positioned above the flange surface of the cylinder body 1.

According to a preferred solution, the outer diameter of the main piston part 2 is larger than the outer diameter of the auxiliary piston part 3;

the outer diameter of the upper section of the main piston part 2 is smaller than that of the lower section, and the outer diameter of the lower section is larger than the diameter of an inner hole of the rigid limiting nut 4.

According to the preferred scheme, the outer part of the main piston part 2 is in sliding guide with the inner wall of the cylinder body 1 through a sealing ring 8 and an upper guide ring 9;

the outside of the auxiliary piston portion 3 is slidably guided by a guide ring 10 provided on the inner wall of the cylinder 1.

According to a preferred solution, a dust ring 11 is arranged between the adjusting gear 6 and the main piston part 2 to prevent dirt and grease etc. from entering the existing cylinder.

According to a preferred scheme, the adjusting gear 6 and the rigid limiting nut 4 are installed through screws and pins.

According to a preferred version, the power assembly comprises:

the brake driving motor 12 is provided, and a motor rotating shaft of the brake driving motor 12 is vertically arranged downwards;

the brake device comprises a bracket 13, wherein the top of the bracket 13 is provided with a power motor 12 with a brake, and the bottom of the bracket 13 is arranged on the upper surface of a fixing piece 14;

and the driving gear 15 is arranged in the bracket 13 and is meshed with a driving gear of a motor rotating shaft of the braking power motor 12.

According to a preferred embodiment, the upper and lower ends of the bracket 13 are mounted to the corresponding drive gear 15 via bearings.

According to a preferred aspect, the anti-backlash jacking assembly comprises:

a gap eliminating jacking cylinder 16;

the oil cylinder channel 17 is formed in the flange surface of the cylinder body 1, and the anti-backlash tightening cylinder piston 7 moves up and down in the oil cylinder channel 17;

and the anti-backlash jacking cylinder oil way 18 is horizontally opened from the outside of the flange surface of the cylinder body 1 to the oil cylinder channel 17 to form a channel.

According to a preferred solution, the device further comprises a detection assembly, wherein the detection assembly comprises:

the follow-up gear 19 is meshed with the adjusting gear 6;

and the encoder 20, wherein the encoder 20 is installed on the follow-up gear 19.

According to a preferred embodiment, the follower gear 19 is arranged on the side remote from the driving gear 15.

The utility model discloses a cylinder body, main piston part and auxiliary piston part, rigidity stop nut, adjusting gear, power component and the tight subassembly in clearance top that disappears have formed and have had the spacing two sections direction hydro-cylinders of high accuracy and adjustable rigidity, specifically include following beneficial effect:

(1) The structure that two piston sections are adopted, two oil-saving cylinders are matched with the two piston sections, and an auxiliary piston is added at the tail part of a main piston, the working of an oil cylinder is usually at a large stroke position, a guide ring is sleeved on the main piston part, the auxiliary piston part is guided by the guide ring on a cylinder body, the stroke can be increased, the guide length of the piston can be increased when the oil cylinder works, and the effect of the anti-unbalance loading capacity of the oil cylinder can be improved by utilizing the increased guide length when the piston is subjected to unbalance loading;

(2) The rigid limit nut is adopted, the height of the rigid limit nut is adjusted by the power motor, the rigid limit as an upper dead point is realized, and the repeated positioning precision of the upper dead point can be realized;

(3) The anti-backlash jacking cylinder is adopted, a piston of the anti-backlash oil cylinder is tightly attached to the adjusting fluted disc along with the up and down of the nut, and the service lives of the rigid nut and the oil cylinder can be prolonged;

(4) The high-precision adjustment precision of 0.01mm is realized by adopting the matching of the encoder and the gear set;

(5) Two oil passages are adopted on the cylinder body, so that the oil flows of the main piston part and the auxiliary piston part are realized.

The following description of the preferred embodiments for carrying out the present invention will be made in detail with reference to the accompanying drawings, so that the features and advantages of the present invention can be easily understood.

Drawings

Fig. 1 is a schematic structural view of the present invention, in which a piston is located at a bottom dead center;

fig. 2 is a schematic structural view of the present invention, in which the piston is located at the top dead center;

FIG. 3 is an enlarged view of A in FIG. 2;

fig. 4 is an enlarged schematic view of the main piston portion and the auxiliary piston portion of the present invention;

fig. 5 is an enlarged schematic view of the power module according to the present invention;

fig. 6 is an exploded view of the power module according to the present invention;

description of the reference symbols

1. A cylinder body; 2. a main piston portion; 3. an auxiliary piston portion; 4. a rigid limit nut; 5. a serrated thread; 6. an adjusting gear; 7. the gap eliminating and cylinder piston is tightly pressed; 8. a seal ring; 9. an upper guide ring; 10. a lower guide ring; 11. a dust ring; 12. a power motor with a brake; 13. a support; 14. a fixing member; 15. a driving gear; 16. eliminating the clearance and tightly jacking the cylinder; 17. an oil cylinder channel; 18. the gap is eliminated and the cylinder oil way is tightly pressed; 19. a follower gear; 20. an encoder.

Detailed Description

In order to make the purpose, technical scheme and advantage of the technical scheme of the utility model clearer, will combine in the following the utility model discloses the drawing of concrete embodiment is right the technical scheme of the embodiment of the utility model carries out clear, complete description. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

Possible embodiments within the scope of the invention may have fewer components, have other components not shown in the figures, different components, differently arranged components or differently connected components, etc. than the embodiments shown in the figures. Further, two or more of the components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as a plurality of separate components.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The utility model provides a two festival direction hydro-cylinders with high accuracy and adjustable rigidity are spacing for among the hydro-cylinder direction technology, the utility model discloses do not restrict the type of hydro-cylinder, nevertheless this two festival direction hydro-cylinder structure specially adapted receive in the condition when the piston carries partially.

Generally, the utility model provides a have the spacing two sections guide cylinder of high accuracy and adjustable rigidity mainly includes cylinder body 1, main piston part 2 and auxiliary piston part 3, rigidity stop nut 4, adjusting gear 6, power component, the tight subassembly in clearance top that disappears. Reference can be made to fig. 1, which shows the arrangement relationship of a cylinder body 1, a main piston part 2, an auxiliary piston part 3, a rigid limit nut 4, an adjusting gear 6, a power assembly and a backlash eliminating and tightening assembly.

In order to improve the guide length of the piston in the moving process of the oil cylinder, when the piston is subjected to unbalance loading, the anti-unbalance loading capacity of the oil cylinder can be improved by utilizing the increased guide length, and therefore, in the technical scheme provided by the embodiment, a double-section piston structure is arranged in an oil cylinder body 1, and specifically comprises a main piston part 2 and an auxiliary piston part 3 which are integrally arranged in an inner cavity of the cylinder body 1 from top to bottom and move up and down, wherein the oil cylinder body 1 is arranged to form a top opening and a bottom closed cavity, an upper section and a lower section are formed in the oil cylinder body, a sawtooth thread 5 is arranged on the inner wall of the top opening, and an oil way structure is arranged on the side surface of the bottom;

in order to realize the adjustment of the upper dead point and ensure the repeated positioning precision of the upper dead point, a rigid limit nut 4 is sleeved between a main piston part 2 and the inner wall of a cylinder body 1, the top of the rigid limit nut 4 is positioned above the flange surface of the cylinder body 1, a sawtooth thread 5 on the outer circumference ring of the rigid limit nut 4 is meshed with an inner thread of the cylinder body 1, a height adjusting power source of the rigid limit nut 4 is from a power assembly, an adjusting gear 6 is installed on the top of the rigid limit nut 4 through a screw and a pin and is meshed with a driving gear 15 in the power assembly to realize rotation and positioning, the adjusting gear 6 is also installed on the outer circumference ring of the main piston part 2, and a dust ring 11 is arranged between the adjusting gear and the main piston part 2 to prevent dust, oil and dirt and the like from entering a cylinder;

as shown in fig. 1 and 2, the rigid limit nut 4 is firmly engaged with saw-shaped teeth on the inner wall of the top of the cylinder body, a power motor 12 with a brake in a power assembly is mounted on the upper surface of a fixing part 14 through a bracket 13, a motor rotating shaft is vertically arranged downwards, a driving gear 15 is also mounted in the bracket 13 and is engaged with a driving gear of the motor rotating shaft of the power motor 12 with the brake, the power motor 12 with the brake realizes forward and reverse rotation, the driving gear 15 is ensured to drive an adjusting gear 6 to drive the rigid limit nut 4 to rotate, the motor can be locked at a final position after the rotation is stopped, and the final position of the height adjusted by the rigid limit nut 4 is ensured not to be changed;

as shown in fig. 2, which is a state diagram of the oil cylinder piston reaching the top dead center position, the main piston part 2 is divided into an upper section, a middle section and a lower section, the outer diameter of the upper section is smaller than that of the lower section, the outer diameter of the lower section is larger than the inner hole diameter of the rigid limit nut 4, and when the main piston part is positioned at the top dead center, the bottom end surface of the rigid limit nut 4 is in rigid contact with the top limit end surface of the lower section of the main piston part 2 to realize precise rigid positioning;

in the actual working process, when the piston reaches the upper dead point for limiting, the rigid limiting nut 4 and the sawtooth part in the cylinder body 1 can generate impact load mentioned in the background, in order to avoid the situation, the service lives of the rigid limiting nut 4 and the oil cylinder are prolonged, the anti-backlash puller cylinders 16 of the anti-backlash puller assembly are uniformly distributed on a flange of the cylinder body 1, the tops of the anti-backlash puller cylinder pistons 7 are abutted to the lower surface of the adjusting gear 6, the anti-backlash puller cylinder pistons 7 of the anti-backlash puller cylinders 16 can be tightly attached to a fluted disc of the adjusting gear 6 along with the upper part and the lower part of the rigid limiting nut 4, oil cylinder channels 17 are formed in the flange surface of the cylinder body 1, the anti-backlash puller cylinder pistons 7 move up and down in the oil cylinder channels 17, the anti-backlash puller cylinder oil channels 18 are horizontally formed from the outer part of the flange surface of the cylinder body 1 to form channels for injecting hydraulic oil, the anti-backlash puller cylinder pistons 7 can provide upward force for the adjusting gear 6 and transmit the rigid limiting nut 4 under the action of hydraulic oil, and the upper surface of the sawtooth part of the rigid limiting nut 4 is always in a meshed state with the sawtooth part of the cylinder body 1.

As shown in fig. 1 and 2, the outer diameter of the main piston part 2 is larger than the outer diameter of the auxiliary piston part 3, the outer part of the main piston part 2 is sealed and rented through a sealing ring 8, the main piston part 2 and the inner wall of the cylinder body 1 are slidably guided through an upper guide ring 9, the auxiliary piston part 3 adopts a polished rod structure, the outer part is slidably guided through a lower guide ring 10 arranged on the cylinder body 1 and the inner wall of the cylinder body 1, in addition, the inner part of the cylinder body 1 is also provided with an upper and a lower two-section structures with different inner diameters corresponding to the main piston part 2 and the auxiliary piston part 3, the working of the oil cylinder is always at a large stroke position, so that the sufficient guide distance is increased when the oil cylinder works to achieve the anti-unbalance loading capacity, specifically, the distance between the main piston part 2 and the auxiliary piston part 3 is lengthened when the piston moves upwards, namely, the distance between the upper guide ring 9 and the lower guide ring 10 is increased, fig. 1 is a bottom dead center state, wherein the distance between the upper guide ring 9 and the lower guide ring 10 is the minimum, fig. 2 is a top dead center state, and the maximum distance between the upper guide ring 9 and the lower guide ring 10 can increase the piston can improve the anti-unbalance loading capacity when the piston can actually improve the piston;

in addition, in order to realize the flowing of the oil of the main piston part 2 and the auxiliary piston part 3, two oil passages are added on the cylinder body 1, because the outer diameter of the main piston part 2 is larger than that of the auxiliary piston part 3, the oil passages are arranged at two sides of the auxiliary piston part 3, the oil circulation between the main piston cavity and the auxiliary piston cavity is realized, and the oil passage can enter the main oil cavity and the auxiliary oil cavity through a liquid filling valve block arranged at the side surface of the cylinder barrel.

The detection assembly is composed of a gear set and an encoder 20, the gear set is meshed with the adjusting gear 6 and assembled together, the follow-up gear 19 in the gear set rotates along with the adjusting gear 6 in a meshed mode, the encoder 20 and the follow-up gear 19 keep the same rotating angle after being assembled, the detection program calculates the output data of the encoder 20 to monitor the rotating angle of the rigid limit nut 4, and the vertical running height of the rigid limit nut 4 is determined through program calculation.

Therefore, the precision of the adjustment of the limit nut is ensured to reach 0.01mm by utilizing the structure, the program setting, the gear ratio of the gear set and the precision of the encoder, in the embodiment, the gear ratio of the adjusting gear 6 and the follow-up gear 19 is 8, the thread pitch of the rigid limit nut 4 is 8mm, namely, every time the limit nut 4 rises by 8mm, the follow-up gear rotates by 64 circles, 262144 bytes are output by each circle of the encoder, and the measurement error is 0.03 degrees, so the precision is 0.01mm.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (7)

1. The utility model provides a two section direction hydro-cylinders with high accuracy and adjustable rigidity are spacing, its characterized in that includes:

a cylinder body (1);

the piston type cylinder comprises a main piston part (2) and an auxiliary piston part (3), wherein the main piston part (2) and the auxiliary piston part (3) are integrally arranged in an inner cavity of a cylinder body (1) from top to bottom and move up and down;

the rigid limiting nut (4), the rigid limiting nut (4) is sleeved between the main piston part (2) and the inner wall of the cylinder body (1), and the sawtooth-shaped threads (5) on the outer peripheral ring of the rigid limiting nut (4) are meshed with the internal threads of the cylinder body (1);

the adjusting gear (6), the adjusting gear (6) is installed on the top of the rigid limiting nut (4) and is positioned on the outer peripheral ring of the main piston part (2);

the power assembly is arranged at one end close to the flange surface of the cylinder body (1) and is meshed with the adjusting gear (6) to drive the adjusting gear (6) to rotate positively and negatively;

the anti-backlash jacking assembly is characterized in that anti-backlash jacking cylinders (16) of the anti-backlash jacking assembly are uniformly distributed on a flange of the cylinder body (1), and the tops of anti-backlash jacking cylinder pistons (7) of the anti-backlash jacking assembly are abutted to the lower surface of the adjusting gear (6).

2. The double-joint pilot cylinder with high precision and adjustable stiffness limit according to claim 1, characterized in that the outer diameter of the main piston part (2) is larger than the outer diameter of the auxiliary piston part (3);

the outer diameter of the upper section of the main piston part (2) is smaller than that of the lower section, and the outer diameter of the lower section is larger than the diameter of an inner hole of the rigid limiting nut (4).

3. The double-section guide oil cylinder with high precision and adjustable rigidity limit as claimed in claim 2, characterized in that the outside of the main piston part (2) is slidably guided with the inner wall of the cylinder body (1) through a seal ring (8) and an upper guide ring (9);

the outside of the auxiliary piston portion (3) is slidably guided by a guide ring (10) provided on the inner wall of the cylinder body (1).

4. The double-section guiding cylinder with high precision and adjustable stiffness limit according to claim 3 is characterized in that a dust ring (11) is arranged between the adjusting gear (6) and the main piston part (2).

5. The dual stage pilot cylinder with high precision and adjustable stiffness limits of claim 4, wherein the power assembly comprises:

the brake device comprises a power motor (12) with a brake, wherein a motor rotating shaft of the power motor (12) with the brake is vertically and downwards arranged;

the brake device comprises a bracket (13), wherein a power motor (12) with a brake is installed at the top of the bracket (13), and the bottom of the bracket (13) is installed on the upper surface of a fixing piece (14);

the driving gear (15) is installed in the support (13) and meshed with a driving gear of a motor rotating shaft of the braking power motor (12).

6. The dual-section steering cylinder with high precision and adjustable stiffness limits of claim 5, wherein the anti-backlash jacking assembly comprises:

a gap eliminating jacking cylinder (16);

the oil cylinder channel (17), the oil cylinder channel (17) is arranged in the flange surface of the cylinder body (1), and the gap-eliminating jacking cylinder piston (7) moves up and down in the oil cylinder channel (17);

the anti-backlash jacking cylinder oil way (18) is horizontally opened from the outside of the flange surface of the cylinder body (1) to the oil cylinder channel (17) to form a channel.

7. The dual-section pilot cylinder with high accuracy and adjustable stiffness stops of claim 6, further comprising a detection assembly, the detection assembly comprising:

the follow-up gear (19), the follow-up gear (19) and the adjusting gear (6) are meshed;

an encoder (20), the encoder (20) being mounted on the follower gear (19).

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