Large oil cylinder unbalance loading prevention device

Abstract

The utility model discloses a large oil cylinder unbalance loading prevention device which is arranged in an oil cylinder, a piston rod is arranged in the oil cylinder, the large oil cylinder unbalance loading prevention device comprises a connector and a lock pin, the lock pin limits the connector at the top end of the piston rod, the connector comprises a deflection part and an installation part, the installation part is arranged on the periphery of the deflection part, and the side, facing the piston rod, of the deflection part is hemispherical. A containing cavity is formed in the center of the top end of the piston rod and copies the bottom of the deflection part, the lock pin comprises a pin head and a pin rod, the pin rod is in threaded fit with the top end of the piston rod, a pin hole is formed in the center of the deflection part and used for containing the pin head, a receding hole is formed in the bottom end of the pin hole and used for containing the pin rod, and the diameter of the pin head is larger than the inner diameter of the top end of the receding hole. According to the large oil cylinder unbalance loading prevention device, the hemispherical connector and the containing cavity are adopted, and the connector can rotate during unbalance loading, so that the inclined piston rod is corrected, the inner wall of the cylinder body is prevented from being strained, and the service life of the oil cylinder is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil cylinder technology, concretely is a large -scale oil cylinder anti -off -load device. BACKGROUND

[0002] Hydraulic cylinder is a kind of industrial automation device that application is very extensive, hydraulic cylinder is the hydraulic energy conversion into mechanical energy, does linear reciprocating motion (or swing motion) the hydraulic actuator of executing.It simple structure, work reliable.When it is used to realize reciprocating motion, can avoid speed reducer, and there is no transmission gap, movement is stable, therefore in the hydraulic system of various machines is widely used.

[0003] Due to the gravity of large heavy object is difficult to determine, leading to the top of oil cylinder piston rod appears off load, make the piston rod of hydraulic cylinder tilt, cause the oil cylinder wall of hydraulic cylinder to be scratched, shorten the service life of hydraulic cylinder. UTILITY MODEL CONTENTS

[0004] To solve the defects of the prior art, the utility model provides a large -scale oil cylinder anti -off -load device, can effectively prevent the off load of oil cylinder piston rod.

[0005] To realize the above technical purpose, the utility model adopts the following technical scheme: a large -scale oil cylinder anti -off -load device is arranged in oil cylinder, the oil cylinder is equipped with piston rod, and includes connecting head and lock pin, the lock pin limits the connecting head on the top of piston rod, the connecting head includes deflection part and mounting portion, the mounting portion is arranged around the deflection part, the deflection part is hemispherical on the side of piston rod, the center of the top of piston rod is equipped with accommodating cavity, the accommodating cavity is shaped with the bottom of deflection part, the lock pin includes pin head and pin rod, the pin rod is screwed with the top of piston rod, the center of deflection part is equipped with pin hole, the pin hole is used to accommodate pin head, the bottom end of pin hole is equipped with avoiding hole, the avoiding hole is used to accommodate pin rod, and the diameter of pin head is greater than the inner diameter of the top end of avoiding hole.

[0006] Preferably, the avoiding hole is circular truncated cone.

[0007] Preferably, the pin hole and pin head are hemispherical.

[0008] Preferably, the oil cylinder includes cylinder body, bottom plate and oil seal, the bottom plate is sealed with the bottom of cylinder body, the oil seal is arranged on the top of cylinder body, the cylinder body is equipped with stroke cavity, the bottom end of piston rod is located in stroke cavity, the top of piston rod passes through oil seal, and the side wall of piston rod is slidably connected with oil seal.

[0009] Preferably, the bottom plate is equipped with oil inlet, and the bottom end of piston rod is equipped with oil groove, and the oil groove is communicated with oil inlet.

[0010] Preferably, the cylinder body is equipped with lug on both sides.

[0011] Preferably, the cylinder top is provided with a mounting flange.

[0012] In conclusion, the present utility model has the following technical effects:

[0013] The large oil cylinder anti-unbalanced load device adopts the semi-spherical connector and the accommodating cavity, the connector can rotate when the load is unbalanced, thereby correcting the inclined piston rod, avoiding the strain of the inner wall of the cylinder, and prolonging the service life of the oil cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structure schematic view of the large oil cylinder anti-unbalanced load device of the present utility model;

[0015] Figure 2 is an unbalanced load state schematic view of the large oil cylinder anti-unbalanced load device of the present utility model;

[0016] Figure 3 is a structure schematic view of the first embodiment of the present utility model;

[0017] Figure 4 is a structure schematic view of the second embodiment of the present utility model;

[0018] The description of the drawing mark is as follows: 1, cylinder; 2, bottom plate; 3, piston rod; 4, oil seal; 5, mounting flange; 6, connector; 61, mounting part; 62, deflection part; 63, pin hole; 64, avoidance hole; 7, lock pin; 71, pin head; 72, pin rod; 8, lifting lug; 9, stroke cavity; 10, oil groove; 11, oil inlet. DETAILED DESCRIPTION

[0019] The present utility model will be further explained in detail in combination with the drawings.

[0020] The present embodiment is only an explanation of the present utility model, and is not a limitation of the present utility model, and the person skilled in the art can make a modification without creative contribution according to the need after reading the present specification, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

[0021] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0022] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0023] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly contacted through intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0025] Embodiment one:

[0026] As Figure 1As shown in Fig. 3, a large oil cylinder anti-bias load device is arranged on an oil cylinder, the oil cylinder is provided with a piston rod 3, and comprises a connecting head 6 and a locking pin 7, the locking pin 7 limits the connecting head 6 to the top end of the piston rod 3, the connecting head 6 comprises a deflection part 62 and a mounting part 61, the mounting part 61 is arranged around the deflection part 62, the deflection part 62 is hemispherical towards one side of the piston rod 3, a containing cavity is arranged at the center of the top end of the piston rod 3, the containing cavity is shaped with the bottom of the deflection part 62, the locking pin 7 comprises a pin head 71 and a pin rod 72, the pin rod 72 is screwed with the top end of the piston rod 3, a pin hole 63 is arranged at the center of the deflection part 62, the pin hole 63 is used for containing the pin head 71, an avoiding hole 64 is arranged at the bottom end of the pin hole 63, the avoiding hole 64 is used for containing the pin rod 72, the diameter of the pin head 71 is larger than the inner diameter of the top end of the avoiding hole 64.

[0027] The diameter of the pin head 71 is larger than the inner diameter of the top end of the avoiding hole 64, which is used for limiting the deflection part 62 to be located at the containing groove, so as to avoid the deflection part 62 from being out of the containing groove; the avoiding hole 64 is arranged to provide a rotating space, so that the angle range of the deflection part 62 can be increased; the mounting part 61 can enlarge the contact area of the deflection part 62 and the load object, and a plurality of bolt holes can be arranged to facilitate the fixation of the piston rod 3 and the load object.

[0028] The large oil cylinder anti-bias load device of the embodiment adopts the hemispherical connecting head 6 and the containing cavity, the connecting head 6 can rotate when the load is biased, so as to correct the inclined piston rod 3, avoid the inner wall of the cylinder body 1 from being damaged, and prolong the service life of the oil cylinder.

[0029] The avoiding hole 64 is circular truncated cone-shaped.

[0030] The oil cylinder comprises a cylinder body 1, a bottom plate 2 and an oil seal 4, the bottom plate 2 is sealed with the bottom of the cylinder body 1, the oil seal 4 is arranged on the top of the cylinder body 1, the cylinder body 1 is provided with a stroke cavity 9, the bottom end of the piston rod 3 is located in the stroke cavity 9, the top end of the piston rod 3 penetrates through the oil seal 4, and the side wall of the piston rod 3 is slidably connected with the oil seal 4; the bottom plate 2 is provided with an oil inlet 11, and the bottom end of the piston rod 3 is provided with an oil groove 10, which is communicated with the oil inlet 11.

[0031] The cylinder body 1 is provided with a lifting lug 8 on both sides; the lifting lug 8 can facilitate the hoisting of the entire oil cylinder and the accurate movement of the oil cylinder to the installation position.

[0032] The top of the cylinder body 1 is provided with a mounting flange 5; the mounting flange 5 is used for facilitating the installation of the cylinder body 1 on the installation object such as a machine table or a base.

[0033] Embodiment two:

[0034] Compared with embodiment one, the difference of the embodiment is that, as shown in Fig. 4, the deflection part 62 is provided with a plurality of bolt holes 65, the mounting part 61 is provided with a plurality of bolt holes 66, and the piston rod 3 is provided with a plurality of bolt holes 67. Figure 4As shown, the pin hole 63 and the pin head 71 are both hemispherical; the hemispherical pin hole 63 and the pin head 71 can make the oil cylinder even upside down, and the spherical surface of the deflection part 62 can still be attached to the inner wall of the accommodating groove.

[0035] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form, and any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application shall fall within the scope of the technical scheme of the present application.

Claims

1. A large oil cylinder anti-unbalance load device, which is arranged in an oil cylinder, wherein a piston rod is arranged in the oil cylinder, characterized in that, The connecting head and the lock pin are included, the lock pin defines the connecting head on the top end of the piston rod, the connecting head includes a deflection part and a mounting part, the mounting part is arranged around the deflection part, the deflection part is hemispherical towards the side of the piston rod, the center of the top end of the piston rod is provided with a containing cavity, the containing cavity is shaped with the bottom of the deflection part, the lock pin includes a pin head and a pin rod, the pin rod is screwed with the top end of the piston rod, the center of the deflection part is provided with a pin hole, the pin hole is used for containing the pin head, the bottom end of the pin hole is provided with a position avoiding hole, the position avoiding hole is used for containing the pin rod, the diameter of the pin head is greater than the inner diameter of the top end of the position avoiding hole.

2. The large oil cylinder anti-unbalance load device according to claim 1, characterized in that, The position avoiding hole is circular truncated cone.

3. The large oil cylinder anti-unbalance load device according to claim 1, characterized in that, The pin hole and the pin head are both hemispherical.

4. The large oil cylinder anti-unbalance load device according to claim 1, characterized in that, The oil cylinder includes a cylinder body, a bottom plate and an oil seal, the bottom plate is sealed on the bottom of the cylinder body, the oil seal is arranged on the top of the cylinder body, the cylinder body is provided with a stroke cavity, the bottom end of the piston rod is located in the stroke cavity, the top end of the piston rod passes through the oil seal, and the side wall of the piston rod is slidably connected with the oil seal.

5. The large oil cylinder bias load preventing device according to claim 4, wherein The bottom plate is provided with an oil inlet, and the bottom end of the piston rod is provided with an oil groove in communication with the oil inlet.

6. The large oil cylinder bias load preventing device according to claim 5, wherein The cylinder body is provided with lifting lugs on both sides.

7. The large oil cylinder bias load preventing device according to claim 5, wherein The top of the cylinder body is provided with a mounting flange.

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