Plunger oil cylinder with piston rod capable of self-adaptively deflecting

Abstract

The plunger oil cylinder comprises a plunger cylinder barrel, a plunger cylinder cover, a spherical guide sleeve and the piston rod, the plunger cylinder barrel is fixedly connected with the plunger cylinder cover, and an inner spherical surface matched with an outer spherical surface of the spherical guide sleeve is arranged on the inner wall of the joint of the plunger cylinder barrel and the plunger cylinder cover. The spherical guide sleeve is rotatably connected with the joint of the plunger cylinder barrel and the plunger cylinder cover, an oil cavity is formed between the spherical guide sleeve and the plunger cylinder barrel, the plunger cylinder barrel is provided with an oil port leading to the oil cavity, one end of the piston rod is located in the oil cavity, and the other end of the piston rod penetrates through the spherical guide sleeve to extend out. The utility model solves the deviation problem of eccentricity in manufacturing and assembling of the mechanism and the problems of angle and eccentricity when the load does swing motion similar to a crank rocker.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil cylinder, more specifically, it relates to a piston rod self -adaptive deflection's plunger cylinder. BACKGROUND

[0002] Generally, the piston rod of the plunger cylinder can only do linear extension and contraction movement, but in some special use occasions, for example, when the eccentric deviation of the manufacturing and assembly of the load appears, or when the load does the swing movement similar to the crank rocker, the piston rod needs to do the extension and contraction movement while being able to deflect at a certain angle to adapt to the running track of the load.

[0003] At present, when the eccentric deviation of the manufacturing and assembly of the mechanism appears, the oil cylinder is generally corrected by adjusting the installation surface of the oil cylinder. However, since the angle and position of the deviation of the load change after the piston rod extends and contracts to different lengths, the adjustment of the installation surface of the oil cylinder cannot completely and effectively solve the problem of the eccentric deviation of the manufacturing and assembly of the external mechanism. Moreover, for the swing movement similar to the crank rocker of the load, the piston rod of the existing plunger cylinder can only do linear extension and contraction movement, which cannot adapt to the situation. Therefore, it is necessary to provide a novel oil cylinder structure. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a plunger cylinder with a piston rod capable of self-adaptive deflection, which solves the problem of the eccentric deviation of the manufacturing and assembly of the mechanism and the angle and eccentricity problem when the load does the swing movement similar to the crank rocker.

[0005] The above technical purpose of the utility model is achieved by the following technical scheme:

[0006] A plunger cylinder with a piston rod capable of self-adaptive deflection, comprising a plunger cylinder barrel, a plunger cylinder cover, a spherical surface guide sleeve and a piston rod, wherein the plunger cylinder barrel is fixedly connected with the plunger cylinder cover, an inner spherical surface adapted to the outer spherical surface of the spherical surface guide sleeve is arranged on the inner wall of the connection between the plunger cylinder barrel and the plunger cylinder cover, the spherical surface guide sleeve is rotatably connected with the connection between the plunger cylinder barrel and the plunger cylinder cover, an oil cavity is formed between the spherical surface guide sleeve and the plunger cylinder barrel, the plunger cylinder barrel is provided with an oil port leading to the oil cavity, one end of the piston rod is located in the oil cavity, and the other end of the piston rod extends out through the spherical surface guide sleeve.

[0007] In one embodiment, the surface of the mounting bench far from the plunger cylinder cover is a mounting plane.

[0008] In one embodiment, the outer diameter of the plunger cylinder cover is less than or equal to the outer diameter of the mounting step.

[0009] In one of the embodiments, the piston rod has a piston part at one end in the oil cavity, the outer diameter of the piston part is larger than the inner diameter of the spherical guide column, and the outer diameter of the piston part is smaller than the inner diameter of the plunger cylinder.

[0010] In one of the embodiments, a sealing element is arranged between the spherical guide sleeve and the plunger cylinder to prevent hydraulic oil in the plunger cylinder from leaking.

[0011] In one of the embodiments, a sealing element is arranged between the spherical guide sleeve and the plunger cylinder cover.

[0012] In one of the embodiments, a sealing element is arranged between the spherical guide sleeve and the plunger cylinder cover.

[0013] In summary, the utility model has the following beneficial effects:

[0014] The utility model changes the outer cylindrical surface of the guide sleeve of the oil cylinder into an outer spherical surface, the outer spherical surface of the guide sleeve cooperates with the inner spherical surface of the plunger cylinder and the plunger cylinder cover, the spherical guide sleeve is deflected at any angle within a certain range, so that the piston rod assembled on the inner hole surface of the spherical guide sleeve can be deflected at any angle within a certain range while performing linear extension and contraction, and the eccentricity deviation problem of the manufacture and assembly of the mechanism and the angle and eccentricity problem when the load performs swing movement similar to the crank rocker are solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structural schematic diagram of the utility model.

[0016] In the figure: 1, plunger cylinder, 2, plunger cylinder cover, 3, piston rod, 4, spherical guide sleeve, 5, sealing element, 6, mounting step, 7, oil port. DETAILED DESCRIPTION

[0017] The utility model will be described in detail in combination with the drawings and examples.

[0018] It is worth noting that the orientation words such as 'up', 'down' and the like involved in the present text are relative to the drawing view angle, and are merely for the convenience of description, and cannot be understood as the limitation of the technical scheme.

[0019] The utility model provides a piston rod can be self -adaptation deflection's plunger oil cylinder, including plunger cylinder 1, plunger cylinder cover 2, spherical surface guide sleeve 4 and piston rod 3, plunger cylinder 1 with plunger cylinder cover 2 fixed connection, the connecting place inner wall of plunger cylinder 1 with plunger cylinder cover 2 is provided with the inner sphere surface of adapting with the outer sphere surface of spherical surface guide sleeve 4, spherical surface guide sleeve 4 with plunger cylinder 1 with plunger cylinder cover 2's connecting place rotationally connects, the oil cavity is formed between spherical surface guide sleeve 4 and plunger cylinder 1, plunger cylinder 1 is provided with the oil port 7 leading to oil cavity, one end of piston rod 3 is in the oil cavity, the other end of piston rod 3 passes through spherical surface guide sleeve 4 and extends out.

[0020] As Figure 1 Shown, plunger cylinder 1 towards the one end inside of plunger cylinder cover 2 sets up hemispherical surface, plunger cylinder cover 2 towards the one end inside of plunger cylinder 1 sets up hemispherical surface, two hemispherical surfaces form with the inner sphere surface of adapting with spherical surface guide sleeve 4, when installing spherical surface guide sleeve 4, first install spherical surface guide sleeve 4 in the end face of plunger cylinder 1, then plunger cylinder cover 2 is connected with plunger cylinder 1, and spherical surface guide sleeve 4 is locked between plunger cylinder 1 and plunger cylinder cover 2.

[0021] In the utility model, piston rod 3 can also make the deflection of any angle in a certain range while carrying out linear telescopic motion. Figure 1 As Shown, external high pressure oil enters plunger cylinder 1 through oil port 7 and acts on the left end face of piston rod 3, thereby pushing piston rod 3 to extend outward, or external load acts on the right end face of piston rod 3, thereby pushing piston rod 3 to retract inward, and at the same time, the pressure oil in the inside of plunger cylinder 1 flows out of plunger cylinder 1 through oil port 7, thereby realizing the linear telescopic motion of piston rod 3.

[0022] When piston rod 3 is deflected due to external mechanism or external load, the center line of piston rod 3 no longer coincides with the center line of plunger cylinder 1 at this time, piston rod 3 drives spherical surface guide sleeve 4 to relatively deflect through the outer sphere surface of spherical surface guide sleeve 4 and the inner sphere surface of plunger cylinder 1 and plunger cylinder cover 2, thereby realizing the deflection motion of piston rod 3 relative to plunger cylinder 1 and plunger cylinder cover 2.

[0023] Further, the circumferential side of the one end of plunger cylinder 1 and plunger cylinder cover 2 is provided with a mounting step 6, and the one side of the mounting step 6 away from plunger cylinder cover 2 is a mounting plane.

[0024] As Figure 1 Shown, plunger cylinder cover 2 is fastened and connected with the mounting step 6 of plunger cylinder 1 through bolts, and preferably, the outer diameter of plunger cylinder cover 2 is less than or equal to the outer diameter of the mounting step 6.

[0025] Further, the piston rod 3 is provided with a piston part at one end in the oil cavity, the outer diameter of the piston part is greater than the inner diameter of the spherical guide column, and the outer diameter of the piston part is smaller than the inner diameter of the plunger cylinder 1.

[0026] Further, the sealing element 5 is arranged between the spherical guide sleeve 4 and the plunger cylinder 1 to prevent the hydraulic oil in the plunger cylinder 1 from leaking.

[0027] Further, the sealing element 5 is arranged between the spherical guide sleeve 4 and the plunger cylinder 1 to prevent the hydraulic oil in the plunger cylinder 1 from leaking.

[0028] Further, the sealing element 5 is arranged between the spherical guide sleeve 4 and the plunger cylinder 1 to prevent the hydraulic oil in the plunger cylinder 1 from leaking.

[0029] The outer cylindrical surface of the guide sleeve of the oil cylinder is changed into an outer spherical surface, the outer spherical surface of the guide sleeve is matched with the inner spherical surface of the plunger cylinder 1 and the plunger cylinder cover 2, the spherical guide sleeve 4 is deflected at any angle within a certain range, so that the piston rod 3 assembled on the inner hole surface of the spherical guide sleeve 4 can be deflected at any angle within a certain range while performing linear extension and contraction movement, and the eccentricity problem of the manufacturing and assembly of the mechanism and the angle and eccentricity problem when the load performs swing movement similar to the crank rocker are solved.

[0030] The above is only the preferred embodiment of the utility model, the protection scope of the utility model is not only limited to the above-mentioned embodiment, and all technical schemes under the idea of the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary skilled person in the art, some improvements and decorations without departing from the principle of the utility model can also be considered as the protection scope of the utility model.

Claims

1. A piston rod self-adaptable yawing plunger cylinder, characterized in that, The piston cylinder (1), the piston cylinder cover (2), the spherical guide sleeve (4) and the piston rod (3) are included, the piston cylinder (1) is fixedly connected with the piston cylinder cover (2), the inner wall of the connecting place of the piston cylinder (1) and the piston cylinder cover (2) is provided with an inner spherical surface matched with the outer spherical surface of the spherical guide sleeve (4), the spherical guide sleeve (4) is rotatably connected with the connecting place of the piston cylinder (1) and the piston cylinder cover (2), an oil cavity is formed between the spherical guide sleeve (4) and the piston cylinder (1), the piston cylinder (1) is provided with an oil port (7) leading to the oil cavity, one end of the piston rod (3) is in the oil cavity, and the other end of the piston rod (3) penetrates the spherical guide sleeve (4) and extends out.

2. Piston ram cylinder with self-adapting piston rod yawing according to claim 1, characterized in that The mounting platform is away from the one side of the piston cylinder cover (2).

3. Piston ram cylinder with self-adapting piston rod yawing according to claim 2, characterized in that The outer diameter of the piston cylinder cover (2) is less than or equal to the outer diameter of the mounting step (6).

4. The self-aligning piston rod yawing plunger cylinder of claim 1, wherein, The one end of the piston rod (3) in the oil cavity is a piston part, the outer diameter of the piston part is greater than the inner diameter of the spherical guide column, and the outer diameter of the piston part is less than the inner diameter of the piston cylinder (1).

5. The self-aligning piston rod yawing plunger cylinder of claim 1, wherein, The sealing element (5) is arranged between the spherical guide sleeve (4) and the piston cylinder (1), so that the hydraulic oil in the piston cylinder (1) is prevented from leaking.

6. The self-aligning piston rod yawing plunger cylinder of claim 1, wherein, The sealing element (5) is arranged between the spherical guide sleeve (4) and the piston cylinder cover (2).

7. The self-aligning piston rod yawing plunger cylinder of claim 1, wherein, The sealing element (5) is arranged between the spherical guide sleeve (4) and the piston rod (3).

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