CN210440313U - Hydraulic cylinder with piston rod rotation stopping function - Google Patents

Abstract

The utility model discloses a hydraulic cylinder with a piston rod rotation stopping function, which comprises a cylinder barrel, a cylinder cover, a cylinder bottom and a piston rod, wherein the cylinder bottom and the cylinder cover are fixed at two ends of the cylinder barrel; the piston rod is located in the cylinder barrel and is suitable for extending out of the center of the cylinder cover. The cylinder end and cylinder cap are fixed in the both ends of cylinder, and the cylinder center has the cavity that supplies the piston rod to make flexible stroke motion, and the cylinder cap center link up, supplies piston rod one end to stretch out, and the cylinder end is used for supporting the piston rod other end, the utility model discloses a the inside guiding hole of piston rod makes with the non-circular contact surface design of only the bull stick the unable circumference of piston rod is rotatory, has avoided the disturbance of the inside hydraulic oil of cylinder, has improved work efficiency.

Description

Hydraulic cylinder with piston rod rotation stopping function

Technical Field

The utility model relates to a hydraulic cylinder designs technical field, especially relates to a pneumatic cylinder with piston rod splines function.

Background

The contact surface of piston rod and cylinder among the hydraulic cylinder is the face of cylinder usually, consequently at the flexible in-process of piston rod axial, the piston rod often can be along with the rotary motion around the axle center, thereby make the hydraulic oil that has the pole chamber or no pole intracavity produce the disturbance, can arouse the hydraulic oil temperature to rise on the one hand, influence the life of inside each part of pneumatic cylinder, on the other hand can influence hydraulic oil pushing rate, the work efficiency of pneumatic cylinder reduces, need the initial oil feed speed of strict control, avoid producing the impact to the piston rod surface and arouse the increase of piston rod rotational speed, consequently, need design a pneumatic cylinder with piston rod function of stopping the commentaries on classics, make the inside.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve among the prior art hydraulic cylinder have the flexible in-process of piston rod can produce the rotation, lead to the technical problem that work efficiency reduces, the utility model provides a pneumatic cylinder with piston rod splines function solves above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a hydraulic cylinder with a piston rod rotation stopping function comprises a cylinder barrel, a cylinder cover, a cylinder bottom and a piston rod, wherein the cylinder bottom and the cylinder cover are fixed at two ends of the cylinder barrel, a cavity for the piston rod to do telescopic stroke motion is formed in the center of the cylinder barrel, the center of the cylinder cover is communicated, one end of the piston rod extends out, and the cylinder bottom is used for abutting against the other end of the piston rod; the piston rod is positioned in the cylinder barrel and is suitable for extending out of the center of the cylinder cover, and the piston rod is a necessary structure of the hydraulic cylinder; the pneumatic cylinder still include with the only bull stick that the cylinder bottom is connected, the center of piston rod has and extends to being close to the guiding hole of the piston rod one end of cylinder bottom, only the bull stick is suitable for and inserts in the guiding hole, be located in the guiding hole the cross section of only the bull stick has one or more planes, promptly the cross section of only the bull stick is non-circular cross-section, makes the piston rod unable relative only the bull stick is rotatory, it means to "be suitable for" only the bull stick can insert the guiding hole, and with the contact surface of guiding hole laminates each other, promptly only the bull stick with the cross sectional shape of the contact surface of guiding hole is the same.

The utility model discloses change the inner structure of piston rod the center of piston rod sets up only the bull stick, through the piston rod with only the design of the non-circular contact surface of bull stick, makes the circular motion can't be made to the piston rod to reach the effect that the piston rod only changes.

Furthermore, a groove suitable for the rotation stopping rod to be inserted is formed in the inner end face of the cylinder bottom, a pin hole communicated with the groove is formed in the surface of the cylinder bottom, and a bolt is inserted into the pin hole and the through hole in the rotation stopping rod simultaneously to enable the rotation stopping rod to be connected with the cylinder bottom, so that the rotation stopping rod is convenient to disassemble and assemble.

Preferably, the cross section of the rotation stopping rod is of a waist-round structure or a rectangle.

Furthermore, one end of the pin hole penetrates through the surface of the cylinder bottom, the other end of the pin hole is located inside the cylinder bottom, and a plug is arranged at one end, close to the surface of the cylinder bottom, of the plug pin.

Furthermore, the inner surface of the guide hole is also provided with a guide ring matched with the rotation stopping rod, and the rotation stopping rod is suitable for penetrating through the guide ring, so that the rotation stopping rod is prevented from being in direct contact with the piston rod, the circumferential contact surface of the rotation stopping rod is reduced, and the friction resistance is reduced.

Preferably, the guide ring is fixed to one end of the piston rod close to the cylinder bottom.

The utility model has the advantages that:

(1) pneumatic cylinder with piston rod function of splining, through the inside guiding hole of piston rod makes with the non-circular contact surface design of splining the pole the unable circumference of piston rod is rotatory, has avoided the disturbance of the inside hydraulic oil of cylinder, has improved work efficiency.

(2) Pneumatic cylinder with piston rod function of splining need not to consider the influence of hydraulic oil feed speed to piston rod rotation speed, consequently reduces operating personnel's experience quality requirement, and because the splining rod is located the alignment precision of pneumatic cylinder has been improved at the center of piston rod, the release direction of piston rod is fixed, and the effort is more stable.

(3) Pneumatic cylinder with piston rod spline function, spline the pole with the cylinder bottom adopts latch connection, convenient to detach.

(4) Pneumatic cylinder with piston rod function of splining, the piston rod inside through the guide ring with the contact of splining, avoid splining the pole with piston rod internal surface direct contact reduces simultaneously the circumference contact surface size of splining reduces frictional resistance.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of a specific embodiment of a hydraulic cylinder with a piston rod rotation stopping function according to the present invention;

FIG. 2 is an enlarged view taken at a in FIG. 1;

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

fig. 4 is a sectional view taken along line B-B of fig. 1.

In the figure, the cylinder comprises a cylinder barrel 1, a cylinder cover 2, a cylinder cover 3, a cylinder bottom 301, a pin hole 4, a piston rod 5, a rotation stopping rod 6, a guide hole 7, a guide ring 8, a plug 9, a plug pin 10 and a sealing ring.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-4, a hydraulic cylinder with a piston rod rotation stopping function comprises a cylinder barrel 1, a cylinder cover 2, a cylinder bottom 3 and a piston rod 4, wherein the cylinder bottom 3 and the cylinder cover 2 are fixed at two ends of the cylinder barrel 1; the piston rod 4 is located inside the cylinder barrel 1 and is adapted to protrude centrally from the cylinder head 2. The cylinder bottom 3 and the cylinder cover 2 are fixed at two ends of the cylinder barrel 1, the center of the cylinder barrel 1 is provided with a cavity for the piston rod 4 to do telescopic stroke movement, the center of the cylinder cover 2 is communicated, one end of the piston rod 4 extends out, the cylinder bottom 3 is used for abutting against the other end of the piston rod 4, the piston can be sleeved on the piston rod 4, a rod cavity and a rodless cavity are formed with the cylinder barrel 1, a protruding shaft shoulder can be integrally formed on the piston rod 4 to replace the piston, and as shown in figure 1, a sealing ring 10 is arranged between the two protruding shaft shoulders to form the piston.

The hydraulic cylinder further comprises a rotation stopping rod 5 connected with the cylinder bottom 3, the rotation stopping rod 5 is arranged in the center of the cylinder bottom 3, structural symmetry is guaranteed while the rotation stopping rod 5 is located, a guide hole 6 extending to one end of the piston rod 4 close to the cylinder bottom 3 is formed in the center of the piston rod 4, the rotation stopping rod 5 is suitable for being inserted into the guide hole 6, the cross section of the rotation stopping rod 5 located in the guide hole 6 is provided with one or more planes, namely the cross section of the contact surface of the rotation stopping rod 5 and the piston rod 4 is non-circular, the piston rod 4 is limited by the rotation stopping rod 5 and cannot rotate circumferentially around an axis, specifically, the cross section of the rotation stopping rod 5 located in the guide hole 6 can be oval or rectangular, and the oval is a closed quadrangle formed by two corresponding straight edges and two corresponding arc edges. The length of the rotation stopping rod 5 is similar to the stroke of the piston rod 4, and the piston rod 4 is always limited by the rotation stopping rod 5 in the moving process.

Use pneumatic cylinder with 4 functions of piston rod splines after, can not arouse the disturbance of the inside hydraulic oil of pneumatic cylinder, hydraulic oil can steadily promote piston rod 4 and advance, work efficiency improves greatly to at pneumatic cylinder initial work stage, piston rod 4 can be started rapidly, need not the supplementary piston rod 4 starting that promotes of external force, practiced thrift the assistance-time, alleviateed intensity of labour. The rotation stopping rod 5 is arranged at the center of the hydraulic cylinder, so that the structural symmetry is ensured, the straightening precision is improved, the acting force on an external workpiece is continuously stable, and the experience and quality requirements on operators are reduced.

The utility model discloses well cylinder bottom 3 and only commentaries on classics pole 5 can adopt welded fastening, also can adopt threaded connection, the difficult dismouting of welded fastening's structure, and threaded connection's the easy rotation of structure is not hard up the utility model discloses an in a concrete embodiment, cylinder bottom 3 adopts following structure with only commentaries on classics pole 5: the inner end surface of the cylinder bottom 3 is provided with a groove suitable for inserting the rotation stopping rod 5, the surface of the cylinder bottom 3 is provided with a pin hole 301 communicated with the groove, the bolt 9 is simultaneously inserted into the pin hole 301 and the through hole on the rotation stopping rod 5 to connect the rotation stopping rod 5 with the cylinder bottom 3, the rotation stopping rod 5 can be prevented from being driven to rotate by the piston rod 4 by adopting a bolt 99 connection mode, and the disassembly and the assembly are convenient.

Since the interior of the cylinder barrel 1 needs to ensure the sealing performance, for this reason, in the above embodiment, one end of the pin hole 301 penetrates through the surface of the cylinder bottom 3, the other end is located inside the cylinder bottom 3, and one end of the plug 9 close to the surface of the cylinder bottom 3 is provided with the plug 8, and the plug 8 has a sealing function.

The utility model discloses in, the rotation stopping rod 5 can with 6 surface direct contacts of guiding hole, but because rotation stopping rod 5 and 6 length of guiding hole all are similar to the stroke of piston rod 4, consequently the area of contact of rotation stopping rod 5 and guiding hole 6 is great, and reciprocating motion in-process frictional force is great, arouses the noise easily, for this reason the utility model discloses a in a concrete embodiment, 6 internal surfaces of guiding hole still are equipped with the guide ring 7 that matches with rotation stopping rod 5, and rotation stopping rod 5 is suitable for and passes guide ring 7, and guide ring 7 is the shorter loop configuration of length, the inner cross-section of guide ring 7 with rotation stopping rod 5 adaptation, outer cross-section and 6 adaptations of guiding hole, preferred outer cross-section be circular cross-section. The contact area between the guide ring 7 and the rotation stop lever 5 is small, and the friction force is reduced. Since the guide rod needs to be in contact with the rotation stop lever 5 all the time during the extension of the piston rod 4, the guide rod is preferably fixed to the end of the piston rod 4 near the cylinder bottom 3.

The utility model discloses simple structure, work efficiency is high, and the alignment precision is good, and is lower to operating personnel's experience quality requirement.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (6)

1. The utility model provides a pneumatic cylinder with piston rod splines function which characterized in that: the cylinder comprises a cylinder barrel (1), a cylinder cover (2), a cylinder bottom (3) and a piston rod (4), wherein the cylinder bottom (3) and the cylinder cover (2) are fixed at two ends of the cylinder barrel (1); the piston rod (4) is positioned in the cylinder barrel (1) and is suitable for extending out of the center of the cylinder cover (2);

the hydraulic cylinder further comprises a rotation stopping rod (5) connected with the cylinder bottom (3), a guide hole (6) extending to one end, close to the cylinder bottom (3), of the piston rod (4) is formed in the center of the piston rod (4), the rotation stopping rod (5) is suitable for being inserted into the guide hole (6), and one or more planes are formed in contact surfaces of the guide hole (6) and the rotation stopping rod (5).

2. The hydraulic cylinder with a piston rod rotation stop function according to claim 1, wherein: the inner end face of the cylinder bottom (3) is provided with a groove suitable for the rotation stopping rod (5) to be inserted into, the surface of the cylinder bottom (3) is provided with a pin hole (301) communicated with the groove, and a bolt (9) is simultaneously inserted into the pin hole (301) and a through hole in the rotation stopping rod (5) to enable the rotation stopping rod (5) to be connected with the cylinder bottom (3).

3. The hydraulic cylinder with a piston rod rotation stop function according to claim 1, wherein: the cross section of the rotation stopping rod (5) is of a waist-round structure or a rectangle.

4. The hydraulic cylinder with a piston rod rotation stop function according to claim 2, wherein: one end of the pin hole (301) penetrates through the surface of the cylinder bottom (3), the other end of the pin hole is located in the cylinder bottom (3), and a plug (8) is arranged at one end, close to the surface of the cylinder bottom (3), of the plug (9).

5. The hydraulic cylinder with a piston rod rotation stop function according to claim 1, wherein: the inner surface of the guide hole (6) is also provided with a guide ring (7) matched with the rotation stopping rod (5), and the rotation stopping rod (5) is suitable for penetrating through the guide ring (7).

6. The hydraulic cylinder with a piston rod rotation stop function according to claim 5, wherein: the guide ring (7) is fixed at one end of the piston rod (4) close to the cylinder bottom (3).

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