CN215171198U - Hydro-cylinder with adjustable stroke - Google Patents

Abstract

The utility model relates to an oil cylinder with adjustable stroke, including cylinder body, end cover, uide bushing, piston rod and piston, be equipped with first chamber and second chamber in the cylinder body, set up the first hydraulic fluid port that communicates with first chamber and the second hydraulic fluid port that communicates with the second chamber on the cylinder body, the uide bushing is used for limiting the maximum distance that the piston rod stretches out, when the piston rod stretches out to maximum distance, the piston offsets with the uide bushing; the guide sleeve is in threaded fit with the cylinder body, so that the guide sleeve can be screwed in or screwed out along the length direction of the cylinder body. The clamping device can accurately control the closing degree of the clamp, and ensure that the clamp clamps the workpiece without damaging the workpiece.

Description

Hydro-cylinder with adjustable stroke

Technical Field

The utility model relates to a field of hydro-cylinder especially relates to a hydro-cylinder with adjustable stroke.

Background

The oil cylinder has the function of converting hydraulic energy into mechanical energy and can do work along the linear direction, and due to the advantages of simple structure and reliable work, the oil cylinder is widely applied to the field of mechanical production and manufacturing. In a machine tool with a high degree of automation, an oil cylinder is generally used to control opening and closing of a jig.

The structure of hydro-cylinder generally includes the cylinder body, the one end of cylinder body is equipped with the end cover, the other end is equipped with the uide bushing, wear to be equipped with the piston rod on the uide bushing slip, the one end that the piston rod inserted the hydro-cylinder is connected with the piston, the space separation in the piston with the hydro-cylinder is first chamber and second chamber, first hydraulic fluid port and second hydraulic fluid port have still been seted up on the cylinder body, first hydraulic fluid port and first chamber intercommunication, second hydraulic fluid port and second chamber intercommunication, through pouring into hydraulic oil into to first hydraulic fluid port or second hydraulic fluid port, can promote the piston and drive the axial of piston rod along the cylinder body and slide.

In the process of controlling the opening and closing of the clamp by the oil cylinder, the precision of the clamp when the clamp is closed needs to be ensured so as to prevent the workpiece from being extruded and damaged. At present, in the process of controlling the opening and closing of the clamp by using the oil cylinder, the extending length of the piston rod is changed by generally controlling the oil pressure of hydraulic oil introduced into the oil cylinder, so that the clamp is pushed to be closed, and a workpiece is clamped.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the utility model aims at providing a hydro-cylinder with adjustable stroke to solve one or more problems among the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

an oil cylinder with an adjustable stroke comprises a cylinder body, an end cover, a guide sleeve, a piston rod and a piston, wherein a first cavity and a second cavity are arranged in the cylinder body, a first oil port communicated with the first cavity and a second oil port communicated with the second cavity are formed in the cylinder body, the guide sleeve is used for limiting the maximum extending distance of the piston rod, and when the piston rod extends to the maximum distance, the piston is abutted against the guide sleeve; the guide sleeve is in threaded fit with the cylinder body, so that the guide sleeve can be screwed in or screwed out along the length direction of the cylinder body.

Further, the lateral surface of cylinder body is equipped with the external screw thread, the uide bushing is connected with the sleeve, be equipped with the internal thread on the telescopic inner wall, the sleeve cover is established the cylinder body outside, and with cylinder body screw-thread fit.

Furthermore, the lateral surface of the cylinder body is provided with a bulge, the external thread is arranged on the bulge, and a gap is reserved between the inner wall of the sleeve and the lateral surface of the cylinder body so as to communicate the first oil port with the hydraulic oil pipeline through the gap.

Furthermore, a groove is formed in the outer wall of the guide sleeve, a sealing ring is arranged in the groove, and the sealing ring is attached to the inner side wall of the cylinder body.

Furthermore, anti-skid lines are formed on the outer side surface of the sleeve.

Furthermore, a locking bolt penetrates through the sleeve and is in threaded fit with the sleeve, and a threaded end of the locking bolt is abutted against the outer side face of the cylinder body so as to lock the position of the sleeve.

Furthermore, the lateral surface of uide bushing is sunken, forms the oil groove, for first hydraulic fluid port pass through the oil groove with first chamber intercommunication.

Compared with the prior art, the utility model discloses a beneficial technological effect as follows:

the depth of the guide sleeve inserted into the oil cylinder can be adjusted by screwing in or screwing out the guide sleeve, and when the piston rod extends outwards to the longest distance, the piston is abutted against the guide sleeve to limit the maximum extending distance of the piston rod. The maximum stroke of the piston rod can be accurately adjusted by limiting the maximum extending distance of the piston rod, and when the oil cylinder controls the clamp to be opened and closed, the closing degree of the clamp can be accurately controlled by controlling the maximum stroke of the piston rod, so that a workpiece is clamped, excessive closing is avoided, and the workpiece is damaged.

And (II) through the sleeve with the internal thread and the cylinder body with the external thread, the outer side surface of the guide sleeve can be tightly attached to the inner wall of the cylinder body without a gap. Thereby improve the leakproofness between uide bushing and the cylinder body, avoid hydraulic oil to flow out from between uide bushing and the cylinder body.

And (III) an oil groove is arranged, so that the first oil port and the first cavity can be always communicated in the process of screwing in or screwing out the guide sleeve, and hydraulic oil can freely flow between the first oil port and the first cavity.

Drawings

Fig. 1 shows a schematic structural diagram of a cylinder with an adjustable stroke in an embodiment of the present invention;

fig. 2 shows a schematic view of a connection structure of a guide sleeve and a sleeve in an embodiment of the present invention;

fig. 3 shows a schematic structural diagram of the cylinder body in the embodiment of the present invention.

In the drawings, the reference numbers:

1. a cylinder body; 11. an end cap; 12. a first chamber; 121. a first oil port; 13. a second chamber; 131. a second oil port; 14. a protrusion; 141. an external thread; 2. a piston rod; 21. a piston; 3. a guide sleeve; 31. a seal ring; 32. an oil sump; 33. a connecting portion; 4. a sleeve; 41. an internal thread; 42. anti-skid lines; 43. and locking the bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following will describe in further detail a stroke-adjustable oil cylinder according to the present invention with reference to the accompanying drawings and the following detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. To make the objects, features and advantages of the present invention more comprehensible, please refer to the attached drawings. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limitation of the implementation of the present invention, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention.

Examples

Referring to fig. 1, the present application provides a stroke-adjustable oil cylinder, which comprises a cylinder body 1, wherein an end cover 11 is welded at one end of the cylinder body 1, a guide sleeve 3 is arranged at the other end of the cylinder body 1, and the guide sleeve can move along the axis direction of the cylinder body 1. The piston rod 2 is arranged on the guide sleeve 3 in a sliding penetrating mode, a through hole for the piston rod 2 to penetrate through is formed in the guide sleeve 3, the piston rod 2 is matched with the guide sleeve 3 through a sliding pipe, and the axis of the piston rod 2 is overlapped with the axis of the oil cylinder. One end of the piston rod 2 inserted into the oil cylinder is connected with a piston 21, the piston 21 divides the space in the oil cylinder into a first cavity 12 and a second cavity 13, and the first cavity 12 is positioned between the first piston 21 and the guide sleeve 3; the second chamber 13 is located between the piston 21 and the end cap 11.

In addition, the side surface of the cylinder body 1 is further provided with a first oil port 121 and a second oil port 131, the first oil port 121 is communicated with the first cavity 12, and the second oil port 131 is communicated with the second cavity 13. The first oil port 121 and the second oil port 131 are respectively located at both ends of the side of the cylinder 1. The first oil port 121 and the second oil port 131 are both communicated with a hydraulic oil supply device through a hydraulic oil pipeline, and hydraulic oil is injected into the first oil port 121 or the second oil port 131 to push the piston 21 and drive the piston rod 2 to slide along the axial direction of the cylinder body 1.

Referring to fig. 1, the outer side surface of the guide sleeve 3 is attached to the inner side wall of the cylinder body 1, an annular groove is formed in the outer side surface of the guide sleeve 3, and an annular sealing ring 31 is sleeved in the groove. When the outer side surface of the guide sleeve 3 is attached to the inner side wall of the cylinder body 1, the sealing ring 31 is tightly abutted to the groove bottom of the groove and the inner side wall of the cylinder body 1.

Referring to fig. 1, the outer side surface of the guide sleeve 3 is recessed to form an oil groove 32, the oil groove 32 is located at one end of the guide sleeve 3 facing the inside of the cylinder body 1, and the oil groove 32 is communicated with one end of the guide sleeve 3 facing the inside of the cylinder body 1. When the guide sleeve 3 moves into the cylinder 1 until the guide sleeve 3 passes the first oil port 121, the first oil port 121 may be maintained to communicate with the first chamber 12 through the oil groove 32.

Referring to fig. 1 and 2, an annular connecting portion 33 is integrally formed on the end surface of the guide sleeve 3 extending out of the cylinder 1, a sleeve 4 is integrally formed on the outer side surface of the connecting portion 33, the end surface of one end of the sleeve 4 is flush with the end surface of the connecting portion 33 back to the cylinder 1, and the other end extends towards the cylinder 1. The inner side wall of the sleeve 4 is processed with internal threads 41, and a gap is reserved between the inner side wall of the sleeve 4 and the outer side surface of the cylinder body 1.

Referring to fig. 2 and 3, an annular protrusion 14 is integrally formed at one end of the outer side surface of the cylinder body 1 facing the connection portion 33, an external thread 141 is formed on the outer side surface of the protrusion 14, and the sleeve 4 is threadedly engaged with the protrusion 14 by engaging the internal thread 41 with the external thread 141. When the sleeve 4 is rotated, the sleeve 4, the connecting portion 33, and the guide sleeve 3 may be screwed in or out in the axial direction of the cylinder 1, thereby changing the depth of insertion of the guide sleeve 3 into the cylinder 1. When the sleeve 4 is screwed to cross the first oil hole, the hydraulic oil pipeline connected with the first oil hole can be avoided to a gap between the sleeve 4 and the cylinder body 1, so that the hydraulic oil pipeline connected with the first oil hole is prevented from being interfered by the sleeve 4.

Referring to fig. 2, the outer surface of the sleeve 4 is formed with anti-slip threads 42, and the anti-slip threads 42 are located at one end of the sleeve 4 adjacent to the connecting portion 33. The anti-slip lines 42 can facilitate the worker to apply force to the sleeve 4 to drive the sleeve 4 to screw in or screw out.

Referring to fig. 1 and 2, three threaded holes (not shown) are further formed in the outer side surface of the sleeve 4, the three threaded holes are located at one end of the sleeve 4, which is opposite to the connecting portion 33, and the three threaded holes are uniformly arranged along the circumferential direction of the sleeve 4. A locking bolt 43 penetrates through the threaded hole, and the locking bolt 43 is in threaded fit with the threaded hole. When the sleeve 4 is screwed in or screwed out, the locking bolt 43 can be screwed in, so that the threaded end of the locking bolt 43 is tightly abutted against the outer side surface of the cylinder body 1, the positions of the sleeve 4 and the guide sleeve 3 are locked, and the sleeve 4 and the guide sleeve 3 are prevented from being accidentally screwed in or screwed out due to external force.

The working principle of the oil cylinder with the adjustable stroke in the embodiment is as follows:

before adjusting the position of the guide sleeve 3, the locking of the sleeve 4 by the locking bolt 43 is firstly released, then the guide sleeve 3 is screwed in or screwed out to a proper position, and then the relative position between the sleeve 4 and the cylinder body 1 is locked by the locking bolt 43. The depth of the guide sleeve 3 inserted into the oil cylinder can be adjusted by screwing in or screwing out the guide sleeve 3, when the piston rod 2 extends outwards to the longest distance, the piston 21 is abutted against the guide sleeve 3, the maximum extending distance of the piston rod 2 can be limited, and the maximum stroke of the piston rod 2 can be adjusted. When the oil cylinder in the scheme is used for controlling the clamp to open and close, the closing degree of the clamp can be accurately controlled by changing the maximum stroke of the piston rod 2, so that the clamp is ensured to clamp a workpiece, and the workpiece cannot be damaged.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (7)

1. The utility model provides an hydro-cylinder with adjustable stroke, includes cylinder body, end cover, uide bushing, piston rod and piston, be equipped with first chamber and second chamber in the cylinder body, set up the first hydraulic fluid port with first chamber intercommunication and with the second hydraulic fluid port of second chamber intercommunication on the cylinder body, its characterized in that: the guide sleeve is used for limiting the maximum extending distance of the piston rod, and when the piston rod extends to the maximum distance, the piston is abutted against the guide sleeve; the guide sleeve is in threaded fit with the cylinder body, so that the guide sleeve can be screwed in or screwed out along the length direction of the cylinder body.

2. The stroke-adjustable cylinder of claim 1, wherein: the lateral surface of cylinder body is equipped with the external screw thread, the uide bushing is connected with the sleeve, be equipped with the internal thread on the telescopic inner wall, the sleeve cover is established the cylinder body outside, and with cylinder body screw-thread fit.

3. The stroke-adjustable cylinder of claim 2, wherein: the lateral surface of cylinder body is equipped with the arch, the external screw thread is seted up on the arch, telescopic inner wall with there is the clearance between the lateral surface of cylinder body, for first hydraulic fluid port passes through clearance and hydraulic oil pipeline intercommunication.

4. The stroke-adjustable cylinder of claim 2, wherein: the outer wall of the guide sleeve is provided with a groove, a sealing ring is arranged in the groove, and the sealing ring is attached to the inner side wall of the cylinder body.

5. The stroke-adjustable cylinder of claim 2, wherein: and anti-skid grains are formed on the outer side surface of the sleeve.

6. The stroke-adjustable cylinder of claim 2, wherein: the sleeve is provided with a locking bolt in a penetrating mode, the locking bolt is in threaded fit with the sleeve, and the threaded end of the locking bolt is abutted against the outer side face of the cylinder body so as to lock the position of the sleeve.

7. The stroke-adjustable cylinder of claim 1, wherein: the outer side surface of the guide sleeve is sunken to form an oil groove, so that the first oil port is communicated with the first cavity through the oil groove.

Images