Ejector rod locking mechanism for hydraulic cylinder

Abstract

The utility model discloses an ejector rod locking mechanism for a hydraulic cylinder. The ejector rod locking mechanism comprises a hydraulic cylinder assembly and an ejector rod assembly in transmission connection with the hydraulic cylinder assembly. The hydraulic cylinder assembly comprises a hydraulic cylinder body, a hydraulic cavity is formed in the hydraulic cylinder body, a hydraulic oil injection opening communicated with the hydraulic cavity is formed in the hydraulic cylinder body, a piston rod is movably arranged in the hydraulic cavity, one end of the piston rod is connected with the inner wall of the hydraulic cavity through a reset spring, and an ejector rod assembly is arranged at the other end of the piston rod. The ejector rod assembly comprises a connecting screw rod, one end of the connecting screw rod is fixedly connected with the piston rod, an open groove is formed in the other end of the connecting screw rod, a limiting hole is formed in the side wall of the open groove, a limiting piece is arranged in the limiting hole, and one end of an ejector rod is arranged in the open groove and is fixed through the limiting groove formed in the end of one end in cooperation with the limiting piece. The limiting groove and the limiting piece are arranged at the connecting position of the connecting screw rod and the ejector rod, the ejector rod can be automatically clamped into the limiting groove in the process of being inserted into the connecting screw rod, and therefore rapid locking of the connecting screw rod and the ejector rod is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydraulic cylinder especially relates to a top rod locking mechanism for hydraulic cylinder. BACKGROUND

[0002] Hydraulic cylinder, usually including cylinder, piston rod and sealing device, is through to the sealed cylinder input hydraulic oil to push the piston rod, and the hydraulic energy is changed into mechanical energy, the linear reciprocating motion (or swing motion) hydraulic actuator.

[0003] For example, the patent number for 201510528423.5 patent application file discloses a plunger type hydraulic cylinder and connecting structure thereof, including the rack support plate that is connected on the rack end face by bolt;Rack connecting piece is connected on the rack end face, and the rack connecting piece is distributed above and below the rack support plate;Hydraulic cylinder support plate is connected on the plunger shaft end face by bolt;The fixed bolt that is symmetrically arranged on the plunger shaft is up and down;And the chain connecting the rack connecting piece and fixed bolt.

[0004] The connecting structure of the above-mentioned technical scheme plunger type hydraulic cylinder and the outside world is improved from the hard connection of flange type to the soft connection of chain type, thereby improving the reliability of connection, reducing the difficulty of maintenance of operators, and reducing the workload and working strength of maintenance workers.

[0005] However, the above-mentioned scheme still needs to spend more time and process when installing and disassembling.

[0006] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. INVENTION CONTENTS

[0007] The utility model aims at providing a top rod locking mechanism for hydraulic cylinder to solve the deficiency existing in the prior art.

[0008] The above technical purpose of the utility model is realized by the following technical scheme:

[0009] A top rod locking mechanism for hydraulic cylinder, comprising a hydraulic cylinder assembly and a top rod assembly drivingly connected to the hydraulic cylinder assembly.

[0010] The hydraulic cylinder assembly comprises a hydraulic cylinder body, a hydraulic cavity is provided in the interior of the hydraulic cylinder body, a hydraulic oil filling port is formed in the hydraulic cylinder body and communicates with the hydraulic cavity, a piston rod is movably arranged in the hydraulic cavity, one end of the piston rod is connected to the inner wall of the hydraulic cavity through a return spring, and the other end of the piston rod is provided with a top rod assembly.

[0011] The top rod assembly comprises a connecting screw rod, one end of the connecting screw rod is fixedly connected with the piston rod, an open slot is arranged at the other end of the connecting screw rod, a limiting hole is arranged on the side wall of the open slot, a limiting piece is arranged in the limiting hole, one end of the top rod is arranged in the open slot and is fixed through the limiting slot arranged at the one end and the limiting piece.

[0012] Further, the two ends of the piston rod are respectively provided with open structures, the reset spring is arranged in the open structure at one end of the piston rod, and the top rod is arranged in the open structure at the other end of the piston rod.

[0013] Further, the limiting piece comprises a base, the base is provided with a guide slot, and a steel ball is arranged in the guide slot and connected with the guide slot through a spring.

[0014] Further, the limiting slot is an annular structure arranged along the outer surface of the top rod.

[0015] In summary, the utility model has the following beneficial effects:

[0016] By arranging the limiting slot and the limiting piece at the connecting position of the connecting screw rod and the top rod, the top rod can be automatically clamped into the limiting slot during the insertion into the connecting screw rod, so that the quick locking of the two is realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the top rod locking mechanism.

[0018] Figure 2 It is a schematic view of the top rod locking mechanism (without the top rod) of the utility model.

[0019] Figure 3 It is a structural schematic view of the limiting piece.

[0020] Figure 4 It is a schematic view of the connecting process of the connecting screw rod and the top rod.

[0021] Figure 5 It is a schematic view of the connecting result of the connecting screw rod and the top rod. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with the drawings and specific embodiments.

[0023] As Figures 1 to 3 shown, the utility model provides a kind of top rod locking mechanism for hydraulic cylinder, including hydraulic cylinder assembly 1, and the top rod assembly 2 of the transmission connection of hydraulic cylinder assembly 1;

[0024] The hydraulic cylinder assembly 1 includes a hydraulic cylinder body 11, a hydraulic cavity 12 is arranged in the hydraulic cylinder body 11, a hydraulic oil inlet 13 is arranged on the hydraulic cylinder body 11 and communicated with the hydraulic cavity 12, a piston rod 14 is movably arranged in the hydraulic cavity 12, one end of the piston rod 14 is connected with the inner wall of the hydraulic cavity 12 through a reset spring 15, and the other end of the piston rod 14 is provided with a top rod assembly 2.

[0025] The top rod assembly 2 includes a connecting screw rod 21, one end of the connecting screw rod 21 is fixedly connected with the piston rod 14, an open slot 211 is arranged at the other end of the connecting screw rod 21, a limiting hole is arranged on the side wall of the open slot 211, a limiting piece 22 is arranged in the limiting hole, and one end of a top rod 23 is arranged in the open slot 211 and fixed through a limiting slot 231 arranged at the one end and cooperating with the limiting piece 22.

[0026] Both ends of the piston rod 14 are respectively provided with an open structure, the reset spring 15 is arranged in the open structure at one end of the piston rod 14, and the top rod 23 is arranged in the open structure at the other end of the piston rod 14.

[0027] The limiting piece 22 includes a base 221, the base 221 is provided with a guide slot 222, a steel ball 223 is arranged in the guide slot 222, and the steel ball 223 is connected with the guide slot 222 through a spring 224.

[0028] The limiting slot 231 is an annular structure arranged along the outer surface of the top rod 23.

[0029] The working principle of the utility model is as follows:

[0030] As shown in the figure, Figure 4 When installing, the connecting screw rod 21 is first connected and fixed with the piston rod 14, then the limiting piece 22 is arranged in the limiting hole, and finally the top rod 23 is inserted into the open slot 211 of the connecting screw rod 21, in the insertion process of the top rod 23, the end and the side of the top rod 23 will extrude the steel ball 223, and the steel ball 223 will overcome the action force of the spring 224 and shrink into the guide slot 222.

[0031] As shown in the figure, Figure 5 With the end face of the top rod 23 reaching the bottom of the open slot 211 and no longer moving, the limiting slot 231 arranged along the outer surface of the top rod 23 will be opposite to the position of the limiting hole, at this time, the steel ball 223 enters the limiting slot 231 under the action of the spring 224, so that the locking of the top rod 23 is realized.

[0032] The locking stability of the connecting screw rod 21 and the top rod 23 is determined by the action force of the spring 224, and the corresponding type can be selected according to the actual situation.

[0033] In this article, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of expressing the technical solution clearly and conveniently, and therefore cannot be understood as a limitation on the utility model.

[0034] In this article, the terms "including", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, in addition to containing the listed elements, but also containing other elements not explicitly listed.

[0035] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A top rod locking mechanism for a hydraulic cylinder, characterized by, The hydraulic cylinder assembly (1) and the ejector rod assembly (2) are connected in drive. The hydraulic cylinder assembly (1) comprises a hydraulic cylinder body (11), a hydraulic cavity (12) is arranged in the hydraulic cylinder body (11), a hydraulic oil inlet (13) is arranged on the hydraulic cylinder body (11) and communicated with the hydraulic cavity (12), a piston rod (14) is movably arranged in the hydraulic cavity (12), one end of the piston rod (14) is connected with the inner wall of the hydraulic cavity (12) through a reset spring (15), and the other end of the piston rod (14) is provided with the ejector rod assembly (2). The ejector rod assembly (2) comprises a connecting screw rod (21), one end of the connecting screw rod (21) is fixedly connected with the piston rod (14), an open slot (211) is arranged at the other end of the connecting screw rod (21), a limiting hole is arranged on the side wall of the open slot (211), a limiting piece (22) is arranged in the limiting hole, one end of an ejector rod (23) is arranged in the open slot (211) and fixed through a limiting slot (231) arranged at the one end and the limiting piece (22).

2. The ejector rod locking mechanism for a hydraulic cylinder of claim 1, wherein, The piston rod (14) is provided with an open structure at both ends, the reset spring (15) is arranged in the open structure at one end of the piston rod (14), and the ejector rod (23) is arranged in the open structure at the other end of the piston rod (14).

3. The ejector rod locking mechanism for a hydraulic cylinder of claim 1, wherein, The limiting piece (22) comprises a base (221), the base (221) is provided with a guide slot (222), a steel ball (223) is arranged in the guide slot (222), and the steel ball (223) is connected with the guide slot (222) through a spring (224).

4. The ejector rod locking mechanism for a hydraulic cylinder of claim 1, wherein, The limiting slot (231) is an annular structure arranged along the outer surface of the ejector rod (23).

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