CN220791631U - Cutter arm rotary cylinder with oil pressure buffer structure - Google Patents

Abstract

The utility model provides a cutter arm rotary cylinder with an oil pressure buffer structure, which comprises a cylinder body, a mandrel, a limiting block, a piston and a buffer mechanism, wherein the mandrel is rotationally connected with the cylinder body; the buffer mechanism comprises two non-return pressure regulating valves arranged on one side of the cylinder body, the non-return pressure regulating valves are communicated with two oil ways, the non-return pressure regulating valves comprise pressure regulating assemblies and pressure maintaining assemblies, the pressure regulating assemblies regulate the pressure of the oil ways, and the pressure maintaining assemblies keep the oil pressure on the oil ways constant. The rotary cylinder disclosed by the utility model has good tightness and stability, and the piston rotates smoothly and stops without collision by arranging the pressure regulating check valve, so that noise, shaking and part abrasion can be reduced.

Description

Cutter arm rotary cylinder with oil pressure buffer structure

Technical Field

The utility model relates to the technical field of rotary cylinders, in particular to a cutter arm rotary cylinder with an oil pressure buffer structure.

Background

In the application of a numerical control machine tool machining center, a tool changing mechanism is generally arranged, and a tool arm in the tool changing mechanism drives the tool arm to rotate 180 degrees through a rotary cylinder to complete tool changing action. However, traditional rotary cylinder does not set up rotatory buffer structure, at rotatory in-process, because the rapid movement of piston can lead to the card of piston to be dund, beat, in addition, the quick collision of piston and stopper causes the piston impaired when stopping, and the noise is big, still can further lead to driven tool arm to rock, influences the overall stability of equipment.

Disclosure of Invention

The utility model aims to provide a cutter arm rotary cylinder with an oil pressure buffer structure, which overcomes the defects in the prior art.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a tool arm rotary cylinder with oil pressure buffer structure, includes cylinder body, dabber, stopper, piston, buffer gear, the dabber insert locate in the cylinder body and with cylinder body swivelling joint, the piston is fixed at the dabber, the stopper locate in the cylinder body and through locating key and cylinder body fixed connection, the stopper cover is established in dabber outside and dabber sliding connection, be equipped with two oil circuits that drive dabber forward and backward rotation on the cylinder body; the buffer mechanism comprises two non-return pressure regulating valves arranged on one side of the cylinder body, the non-return pressure regulating valves are communicated with two oil ways, the non-return pressure regulating valves comprise pressure regulating assemblies and pressure maintaining assemblies, the pressure regulating assemblies regulate the pressure of the oil ways, and the pressure maintaining assemblies keep the oil pressure on the oil ways constant.

Further, in the cutter arm rotary cylinder with the oil pressure buffer structure, the piston and the limiting block divide the inner cavity of the cylinder body into two oil cavities, and each oil cavity is provided with a first oil pressure hole communicated with the non-return pressure regulating valve and a second oil pressure hole communicated with the oil path; and oil inlets and oil outlets are formed at two ends of the oil way.

Further, the cutter arm rotary cylinder with the oil pressure buffering structure, the non-return pressure regulating valve further comprises a valve body, the pressure regulating assembly comprises a valve needle, a valve needle hole is formed in the valve body, the valve needle is arranged in the valve needle hole, one end of the valve needle is in threaded connection with the valve needle hole, a conical column with the gradually reduced cross section from outside to inside is arranged at the other end of the valve needle, a gap is formed between the conical column and an opening on the inner side of the valve needle hole, and the valve needle hole is communicated with the oil pressure hole I.

Further, the cutter arm rotary cylinder with the oil pressure buffer structure comprises a limit nut, a spring and steel balls, a spring hole communicated with an oil way is formed in the valve body, the spring is arranged in the spring hole, one end of the spring is abutted to the limit nut, the other end of the spring is abutted to the steel balls, the limit nut is arranged at the outer side end of the spring hole and is in threaded connection with the spring hole, the steel balls are abutted to the inner side opening of the spring hole through the spring, and a pressure relief hole positioned on an accessory of the steel balls is further formed in one side of the spring hole.

Furthermore, the cutter arm rotary cylinder with the oil pressure buffer structure is characterized in that a groove corresponding to the oil pressure hole II is further formed in the outer side of the piston, and the depth of the groove is gradually increased along the flowing direction of oil.

Furthermore, the cutter arm rotary cylinder with the oil pressure buffer structure is characterized in that a first sealing ring is arranged between the valve body and the cylinder body and between the positioning key and the cylinder body; and a second sealing ring positioned in the middle section of the valve needle is further arranged between the valve needle and the valve needle hole.

Further, the cutter arm rotary cylinder with the oil pressure buffer structure comprises a cylinder barrel, an upper cylinder cover arranged above the cylinder barrel and a lower cylinder cover arranged below the cylinder barrel, wherein sealing gaskets are arranged between the cylinder barrel and the upper cylinder cover as well as between the cylinder barrel and the lower cylinder cover, and the sealing gaskets are composed of two semicircular sealing gaskets; and a plurality of sealing rings III are arranged between the outer side of the limiting block and the side wall of the inner cavity of the cylinder body.

Further, the cutter arm rotary cylinder with the oil pressure buffer structure is characterized in that the mandrel is further provided with an oil supply mechanism for providing oil for the driving cylinder on the cutter arm, the oil supply mechanism comprises an oil inlet channel and an oil return channel, the oil inlet channel is arranged in the center of the mandrel and extends to the upper end of the mandrel from the bottom of the mandrel, an oil outlet at the upper end of the oil inlet channel is connected with the driving cylinder through a connector and an oil pipe, the oil return channel is arranged on two sides of the oil inlet channel, an oil inlet of the oil return channel is connected with the driving cylinder through a connector and an oil pipe, a rotary connector is arranged on the outer side of the oil outlet in the middle of the oil return channel, an oil return cavity corresponding to the oil outlet of the oil return channel is arranged in the rotary connector, and a connector corresponding to the oil return cavity is arranged on the outer side of the rotary connector.

Furthermore, the cutter arm rotary cylinder with the oil pressure buffer structure is characterized in that the rotary joint is sleeved on the outer side of the mandrel and is in rotary connection with the mandrel through a bearing, and a plurality of sealing rings IV which are axially arranged along the mandrel are further arranged between the rotary joint and the mandrel.

Compared with the prior art, the utility model has the beneficial effects that: through the setting of pressure regulating check valve for rotatory time, it is the biggest to go at oil end oil pressure flow, and can only flow to the needle in oil end restriction oil pressure direction, rethread needle, slot restriction oil pressure flow direction, flow, smooth and stop can not cause the collision when making the piston rotatory, can noise reduction, rock and part wearing and tearing.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.

FIG. 1 is a schematic view of a rotary cylinder with hydraulic damping structure according to the present utility model;

FIG. 2 is a schematic diagram of an exploded view of a rotary cylinder of a tool arm with a hydraulic buffer structure according to the present utility model;

FIG. 3 is a schematic cross-sectional view of a rotary cylinder with hydraulic buffer structure according to the present utility model;

FIG. 4 is a schematic diagram of the piston and spindle of the rotary cylinder with hydraulic buffer structure of the present utility model;

FIG. 5 is a schematic diagram showing a cross-sectional structure of a rotary cylinder with a hydraulic buffer structure according to the present utility model;

FIG. 6 is a schematic diagram of a tool arm rotary cylinder with hydraulic buffer structure and a tool arm connection according to the present utility model;

FIG. 7 is a schematic diagram of the working principle of the rotary cylinder with hydraulic buffer structure according to the present utility model;

in the figure: 1. a cylinder; 11. a cylinder; 12. an upper cylinder cover; 13. a lower cylinder cover; 14. a sealing gasket; 2. a mandrel; 3. a limiting block; 31. a third sealing ring; 4. a piston; 41. a groove; 5. a non-return pressure regulating valve; 51. a valve body; 511. a valve pin hole; 512. a spring hole; 513. a pressure relief hole; 52. a valve needle; 53. a limit nut; 54. a spring; 55. steel balls; 56. a first sealing ring; 57. a second sealing ring; 6. a positioning key; 7. an oil pressure hole I; 8. a second oil pressure hole; 9. an oil supply mechanism; 91. an oil inlet passage; 92. an oil return passage; 93. a swivel joint; 94. an oil return cavity; 95. and a sealing ring IV.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1-7, the cutter arm rotary cylinder with the oil pressure buffer structure comprises a cylinder body 1, a mandrel 2, a limiting block 3, a piston 4 and a buffer mechanism, wherein the mandrel 2 is inserted into the cylinder body 1 and is in rotary connection with the cylinder body 1, the piston 4 is fixed on the mandrel 2 through a bolt and a double round key, the limiting block 3 is arranged in the cylinder body 1 and is fixedly connected with the cylinder body 1 through a positioning key 6, the limiting block 3 is sleeved outside the mandrel 2 and is in sliding connection with the mandrel 2, and two oil ways for driving the mandrel 2 to rotate positively and negatively are arranged on the cylinder body 1; the buffer mechanism comprises two non-return pressure regulating valves 5 arranged on one side of the cylinder body 1, the non-return pressure regulating valves 5 are communicated with two oil ways, the non-return pressure regulating valves 5 comprise pressure regulating assemblies and pressure maintaining assemblies, the pressure of the oil ways is regulated by the pressure regulating assemblies, and the pressure maintaining assemblies keep the oil pressure on the oil ways constant.

As shown in fig. 2, 3 and 7, the piston 4 and the limiting block 3 divide the inner cavity of the cylinder body 1 into two oil cavities, and each oil cavity is provided with a first oil pressure hole 7 communicated with the non-return pressure regulating valve 5 and a second oil pressure hole 8 communicated with an oil path; and the two ends of the oil way are provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are connected with the oil tank through connectors and oil pipes.

In addition, as shown in fig. 2 and 3, the non-return pressure regulating valve 5 further includes a valve body 51, the pressure regulating assembly includes a valve needle 52, a valve needle hole 511 is provided on the valve body 51, the valve needle 52 is provided in the valve needle hole 511, one end of the valve needle 52 is in threaded connection with the valve needle hole 511, the other end is provided with a tapered column with a gradually decreasing section from outside to inside, a gap is provided between the tapered column and an opening inside the valve needle hole 511, and the valve needle hole 511 is communicated with the first oil pressure hole 7. The size of the gap can be adjusted by the screwdriver, so that the oil pressure is adjusted. The pressure maintaining assembly comprises a limit nut 53, a spring 54 and a steel ball 55, a spring hole 512 communicated with an oil way is formed in the valve body 51, the spring 54 is arranged in the spring hole 512, one end of the spring 54 is abutted against the limit nut 53, the other end of the spring 54 is abutted against the steel ball 55, the limit nut 53 is arranged at the outer side end of the spring hole 512 and is in threaded connection with the spring hole 512, the steel ball 55 abuts against an inner side opening of the spring hole 512 through the spring 54, and a pressure relief hole 513 positioned near the steel ball 55 is further formed in one side of the spring hole 512. When the oil feed pressure is greater than the elastic force of the spring 54, the spring 54 is compressed, the steel ball 55 moves outward, the spring hole 512 communicates with the relief hole 513, and the oil flows into the relief hole 513, thereby maintaining the oil feed pressure constant.

As shown in fig. 4 and 7, a groove 41 is provided on the outer side of the piston 4 corresponding to the second hydraulic hole 8, and the depth of the groove 41 gradually increases in the flow direction of the oil. With the rotation of the piston 4, the deep end of the groove 41 is firstly contacted with the second oil pressure hole 8, and with the continued rotation of the piston 4, the hydraulic flow passage between the piston 4 and the second oil pressure hole 8 is gradually reduced, so that the oil discharge amount is reduced until the piston 4 completely closes the second oil pressure hole 8, the purpose of slow speed reduction is achieved, and the piston 4 rotates smoothly.

As shown in fig. 2 and 3, a first sealing ring 56 is arranged between the valve body 51 and the cylinder body 1 and between the positioning key 6 and the cylinder body 1; a second sealing ring 57 positioned in the middle section of the valve needle 52 is also arranged between the valve needle 52 and the valve needle hole 511. Through the setting of sealing washer, avoid fluid to reveal, the leakproofness is good.

Working principle: in an initial state, as shown in a diagram a in fig. 7, a limiting block 3 is fixed with a cylinder body 1 through a positioning key 6 and slides relative to a mandrel 2, a piston 4 is abutted against one side of the limiting block 3, the two are combined into a semicircle, at the moment, an oil inlet cavity in two oil cavities is small and is a corner part on the outer side of the piston 4, an oil outlet cavity of the other oil cavity is a semicircle, hydraulic oil enters from an oil inlet of the oil way, and enters into an oil inlet cavity between the piston 4 and the limiting block 3 through a valve needle hole 511 and an oil pressure hole 7 at the position A. As shown in a graph b in fig. 7, as oil enters the oil inlet cavity, the piston 4 is pushed to rotate, the mandrel 2 is driven to rotate, and therefore the cutter arm is rotated; the hydraulic oil in the oil discharging cavity is discharged through the second oil pressure hole 8, the first oil pressure hole 7 at the position B and the valve needle hole 511, at the moment, the hydraulic oil discharge flow is maximum, and the rotation speed of the cutter arm is the fastest; hydraulic oil can only be discharged through the opening of the valve needle hole 511 at the position B, and the gap opening size of the valve needle hole 511 at the position B is adjusted, so that the rotation of the cutter arm at different speeds can be realized. As shown in fig. 7 c, when the piston 4 covers the second hydraulic hole 8, hydraulic oil is discharged from the first hydraulic hole 7 and the needle hole 511 at the second hydraulic holes 8 and B through the groove 51 in the piston 4, and as the depth of the groove 41 decreases, the hydraulic oil discharge flow rate gradually decreases, and the cutter arm rotation speed gradually decreases. As shown in fig. 7 d, when the piston 4 completely covers the second oil pressure hole 8, the hydraulic oil in the oil discharge chamber is discharged only through the first oil pressure hole 7 at the position B and the needle hole 511, and at this time, the discharge flow rate is minimum and the rotation speed of the cutter arm is the slowest. As shown in fig. 7 e, the piston 4 rotates to be attached to the stopper 3, and the cutter arm stops rotating, and finally 180 degrees of rotation of the cutter arm is realized. Therefore, through the arrangement of the pressure regulating check valve 5, when rotating, the oil pressure flow rate at the oil inlet end is opened to be maximum, and the oil pressure direction can only flow to the valve needle 52 at the oil outlet end, the oil pressure flow direction and flow rate are limited by the valve needle 52 and the groove 41, so that when the piston 4 rotates, the piston is not suddenly blocked, and can smoothly decelerate to the completion of rotation, and finally, the piston 4 is not collided with the limiting block 3, and noise, vibration and part abrasion can be reduced.

Example 2

Based on the structure of the embodiment 1, as shown in fig. 1 and 2, the cylinder 1 comprises a cylinder 11, an upper cylinder cover 12 arranged above the cylinder 11, and a lower cylinder cover 13 arranged below the cylinder 11, the structure is simple, the installation is simple, sealing gaskets 14 are arranged between the cylinder 11 and the upper cylinder cover 12 and between the cylinder cover 13, and the sealing gaskets 14 are composed of two semicircular sealing gaskets, so that the manufacturing difficulty can be reduced; a plurality of sealing rings III 31 are arranged between the outer side of the limiting block 3 and the inner side wall of the cylinder barrel 11, so that the sealing performance is good, and leakage is avoided.

In addition, as shown in fig. 5 and 6, the spindle 2 is further provided with an oil supply mechanism 9 for providing oil for the driving cylinder on the cutter arm, the oil supply mechanism 9 comprises an oil inlet channel 91 and an oil return channel 92, the oil inlet channel 91 is arranged in the center of the spindle 2, extends from the bottom of the spindle 2 to the upper end of the spindle 2, an oil outlet at the upper end of the oil inlet channel 91 is connected with the driving cylinder through a connector and an oil pipe, the oil return channel 92 is arranged on two sides of the oil inlet channel 91, an oil inlet of the oil return channel 92 is connected with the driving cylinder through a connector and an oil pipe, a rotary connector 93 is arranged at the outer side of the oil outlet at the middle part of the oil return channel 92, an oil return cavity 94 corresponding to the oil outlet of the oil return channel 92 is arranged in the rotary connector 93, and the connector is connected with the oil return pipe to convey oil to the oil tank. The swivel joint 93 is sleeved on the outer side of the mandrel 2 and is in rotary connection with the mandrel 2 through a bearing, a plurality of sealing rings IV 95 which are axially arranged along the mandrel 2 are further arranged between the swivel joint 93 and the mandrel 2, a plurality of oil return cavities 94 can be separated through the sealing rings IV 95, and leakage of the oil return cavities 94 can be avoided. Because the cutter arm rotates together with the mandrel 2, the external oil return pipeline can cause the oil pipe to twist and wind, so that the oil pipe is broken, the driving oil cylinder is invalid, and the cutter taking failure and cutter dropping can be caused. The hydraulic oil loop of the driving cylinder runs from the mandrel, so that the problems can be avoided, and the reliability of the device is ensured.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in 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 utility model 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.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (9)

1. A tool arm rotary cylinder with oil pressure buffer structure, its characterized in that: the device comprises a cylinder body, a mandrel, a limiting block, a piston and a buffer mechanism, wherein the mandrel is inserted into the cylinder body and is rotationally connected with the cylinder body, the piston is fixed on the mandrel, the limiting block is arranged in the cylinder body and is fixedly connected with the cylinder body through a positioning key, the limiting block is sleeved outside the mandrel and is in sliding connection with the mandrel, and two oil ways for driving the mandrel to rotate positively and negatively are arranged on the cylinder body; the buffer mechanism comprises two non-return pressure regulating valves arranged on one side of the cylinder body, the non-return pressure regulating valves are communicated with two oil ways, the non-return pressure regulating valves comprise pressure regulating assemblies and pressure maintaining assemblies, the pressure regulating assemblies regulate the pressure of the oil ways, and the pressure maintaining assemblies keep the oil pressure on the oil ways constant.

2. The cutter arm rotary cylinder with an oil pressure buffering structure according to claim 1, characterized in that: the piston and the limiting block divide the inner cavity of the cylinder body into two oil cavities, and each oil cavity is provided with a first oil pressure hole communicated with the non-return pressure regulating valve and a second oil pressure hole communicated with the oil way; and oil inlets and oil outlets are formed at two ends of the oil way.

3. The cutter arm rotary cylinder with an oil pressure buffering structure according to claim 2, characterized in that: the non-return air-vent valve still includes the valve body, the pressure regulating subassembly includes the needle, be equipped with the valve pin hole on the valve body, the needle is located in the valve pin hole, just needle one end and valve pin hole threaded connection, the other end are equipped with the toper post that reduces gradually from outer to interior cross-section, be equipped with the clearance between toper post and the inboard opening of valve pin hole, valve pin hole and oil pressure hole one intercommunication.

4. The cutter arm rotary cylinder with an oil pressure buffering structure according to claim 3, characterized in that: the pressure maintaining assembly comprises a limit nut, a spring and steel balls, a spring hole communicated with an oil way is formed in the valve body, the spring is arranged in the spring hole, one end of the spring is abutted against the limit nut, the other end of the spring is abutted against the steel balls, the limit nut is arranged at the outer side end of the spring hole and is in threaded connection with the spring hole, the steel balls are abutted against an inner opening of the spring hole through the spring, and a pressure relief hole positioned on a steel ball accessory is further formed in one side of the spring hole.

5. The cutter arm rotary cylinder with an oil pressure buffering structure according to claim 3, characterized in that: the outer side of the piston is also provided with a groove which is arranged corresponding to the second oil pressure hole, and the depth of the groove is gradually deepened along the flowing direction of oil.

6. The cutter arm rotary cylinder with an oil pressure buffering structure according to claim 3, characterized in that: a first sealing ring is arranged between the valve body and the cylinder body and between the positioning key and the cylinder body; and a second sealing ring positioned in the middle section of the valve needle is further arranged between the valve needle and the valve needle hole.

7. The cutter arm rotary cylinder with an oil pressure buffering structure according to claim 1, characterized in that: the cylinder body comprises a cylinder barrel, an upper cylinder cover arranged above the cylinder barrel and a lower cylinder cover arranged below the cylinder barrel, sealing gaskets are arranged between the cylinder barrel and the upper cylinder cover and between the cylinder barrel and the lower cylinder cover, and the sealing gaskets are formed by two semicircular sealing gaskets; and a plurality of sealing rings III are arranged between the outer side of the limiting block and the inner side wall of the cylinder barrel.

8. The cutter arm rotary cylinder with an oil pressure buffering structure according to claim 1, characterized in that: the automatic oil feeding device is characterized in that an oil feeding mechanism for providing oil for a driving cylinder on the cutter arm is further arranged on the mandrel, the oil feeding mechanism comprises an oil feeding channel and an oil return channel, the oil feeding channel is arranged in the center of the mandrel and extends to the upper end of the mandrel from the bottom of the mandrel, an oil outlet at the upper end of the oil feeding channel is connected with the driving cylinder through a connector and an oil pipe, the oil return channel is arranged on two sides of the oil feeding channel, an oil inlet of the oil return channel is connected with the driving cylinder through a connector and an oil pipe, a rotary connector is arranged on the outer side of the oil outlet in the middle of the oil return channel, an oil return cavity corresponding to the oil outlet of the oil return channel is arranged in the rotary connector, and a connector corresponding to the oil return cavity is arranged on the outer side of the rotary connector.

9. The cutter arm rotary cylinder with an oil pressure buffering structure according to claim 8, characterized in that: the rotary joint is sleeved on the outer side of the mandrel and is rotationally connected with the mandrel through a bearing, and a plurality of sealing rings IV which are axially arranged along the mandrel are further arranged between the rotary joint and the mandrel.