Oil cylinder with automatic compensation function

Abstract

The utility model discloses an oil cylinder with an automatic compensation function, and relates to the technical field of hydraulic cylinders. An opening is formed in the top of an outer cylinder barrel, and an outer oil hole is formed in the side wall of the bottom of the outer cylinder barrel and connected with an oil pipe. The outer sliding rod vertically slides in the outer cylinder barrel, the outer sliding rod is of a hollow structure, an opening is formed in the bottom of the outer sliding rod, and the interior of the outer sliding rod communicates with the outer cylinder barrel; the bottom of the inner cylinder barrel is fixedly connected to the inner wall of the bottom of the outer cylinder barrel, a cylinder cover is arranged on the top of the inner cylinder barrel, and an inner oil hole is formed in the side wall of the inner cylinder barrel and connected with an oil pipe. The top of the inner cylinder rod extends out of the cylinder cover to be connected with the inner wall of the top of the outer sliding rod, and a piston is arranged at the bottom of the inner cylinder rod and vertically slides in the inner cylinder barrel. Hydraulic oil is firstly filled into the outer cylinder barrel and the outer sliding rod through the outer oil hole, pushing force can be provided for the outer sliding rod when power of the outer sliding rod and the outer cylinder barrel is insufficient, and automatic compensation of the pushing force can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and more specifically to a hydraulic cylinder with automatic compensation function. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device and has no transmission backlash, resulting in smooth movement. Therefore, it is widely used in the hydraulic systems of various machines. The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides. A hydraulic cylinder basically consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a cushioning device, and a venting device.

[0003] In existing technologies, insufficient thrust often occurs during use, failing to achieve the expected results. When power is insufficient, the machine can only give up, greatly affecting work efficiency.

[0004] Therefore, how to provide a hydraulic cylinder with automatic compensation function that can automatically compensate for insufficient hydraulic cylinder thrust is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a hydraulic cylinder with an automatic compensation function, which aims to solve the problems in the background art mentioned above, and realize the automatic compensation of hydraulic cylinder thrust to complete the work when the hydraulic cylinder thrust is insufficient.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hydraulic cylinder with automatic compensation function includes:

[0008] The outer cylinder has an opening at its top and an external oil hole on its bottom side wall, the external oil hole being connected to an oil pipe.

[0009] An outer sliding rod slides vertically within an outer cylinder. The outer sliding rod has a hollow structure and an opening at its bottom. The interior of the outer sliding rod communicates with the outer cylinder.

[0010] The inner cylinder is fixedly connected to the bottom inner wall of the outer cylinder. A cylinder cover is provided on the top of the inner cylinder. An inner oil hole is provided on the side wall of the inner cylinder, and the inner oil hole is connected to an oil pipe.

[0011] An inner cylinder rod is provided, the top of which extends out of the cylinder head and connects to the top inner wall of the outer slide rod. A piston is provided at the bottom of the inner cylinder rod, and the piston slides vertically in the inner cylinder.

[0012] Furthermore, an outer sealing ring is provided on the inner wall of the top of the outer cylinder, and the outer sliding rod slides on the inner wall of the outer sealing ring.

[0013] Furthermore, the top of the inner cylinder rod is provided with a vertical threaded hole, and the top center of the outer slide rod is provided with a vertical threaded hole, in which a vertical threaded rod is provided, and the vertical threaded rod passes through the vertical threaded hole and is threadedly connected to the vertical threaded hole.

[0014] Furthermore, a mounting base is provided at the bottom of the inner cylinder, and the mounting base is fixedly connected to the middle of the bottom inner wall of the outer cylinder by screws, and the top of the mounting base is connected to the inner cylinder.

[0015] Furthermore, a bottom sealing groove is provided on the bottom outer wall of the outer cylinder, and an outer sealing gasket is provided in the bottom sealing groove.

[0016] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a hydraulic cylinder with an automatic compensation function. By setting an outer cylinder and an outer slide rod inside an inner cylinder, hydraulic oil is first filled into the outer cylinder and outer slide rod through the outer oil hole during use. The top of the outer slide rod is connected to the position to be used, and work is performed initially. When the pushing force is insufficient, hydraulic oil can be filled into the inner cylinder, which can then push the inner slide rod upwards, thereby pushing the outer slide rod. This provides pushing force to the outer slide rod when the power of the outer cylinder and outer slide rod is insufficient, achieving automatic compensation of the pushing force. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 A cross-sectional view of a hydraulic cylinder with automatic compensation function provided by this utility model.

[0019] Wherein: 1 is the outer cylinder; 2 is the outer oil hole; 3 is the outer slide rod; 4 is the inner cylinder; 5 is the cylinder head; 6 is the inner cylinder rod; 7 is the piston; 8 is the outer sealing ring; 9 is the vertical threaded hole; 10 is the vertical screw; 11 is the mounting base; 12 is the sealing groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] See Figure 1 This utility model discloses a hydraulic cylinder with automatic compensation function, comprising:

[0022] The outer cylinder 1 has an opening at the top and an external oil hole 2 on the bottom side wall of the outer cylinder 1. The external oil hole 2 is connected to an oil pipe. In this embodiment, the outer cylinder 1 is a barrel-shaped structure with an open top. The external oil hole 2 is located at the bottom of the side wall of the outer cylinder 1. When in use, the oil pipe delivers hydraulic oil into the outer cylinder 1, which can push up the outer slide rod 3. When the oil pipe draws oil from the outer cylinder 1, it can drive the outer slide rod 3 to slide downward.

[0023] The outer slide rod 3 slides vertically in the outer cylinder 1. The outer slide rod 3 has a hollow structure and an opening at its bottom. The interior of the outer slide rod 3 is connected to the outer cylinder 1. In this embodiment, the outer slide rod 3 is sealed to the side wall of the outer cylinder 1. When the outer slide rod 3 moves upward, it can push the object being pushed upward and do work upward.

[0024] The inner cylinder 4 is fixedly connected to the bottom inner wall of the outer cylinder 1. The top of the inner cylinder 4 is provided with a cylinder cover 5. The side wall of the inner cylinder 4 is provided with an inner oil hole, which is connected to an oil pipe. In this embodiment, the inner cylinder 4 is used to fill hydraulic oil. The cover plate is sealed to the inner cylinder 4. The top and bottom of the inner cylinder 4 are provided with inner oil holes, which are respectively provided on both sides of the piston 7.

[0025] The inner cylinder rod 6 extends out of the cylinder cover 5 and connects to the inner wall of the top of the outer slide rod 3. A piston 7 is provided at the bottom of the inner cylinder rod 6, and the piston 7 slides vertically in the inner cylinder 4. In this embodiment, the outer wall of the piston 7 is sealed to the inner wall of the inner cylinder 4. When hydraulic oil is filled downward toward the piston 7, it can drive the piston 7 and the inner cylinder rod 6 upward. When hydraulic oil is filled downward toward the piston 7, it can drive the piston 7 and the inner cylinder rod 6 downward. By connecting the inner cylinder rod 6 and the outer slide rod 3, additional power can be provided when the outer slide rod 3 is working, and power compensation can be performed.

[0026] An outer sealing ring 8 is provided on the inner wall of the top of the outer cylinder 1, and the outer slide rod 3 slides on the inner wall of the outer sealing ring 8. In this embodiment, by providing the outer sealing ring 8, the outer cylinder 1 and the outer slide rod 3 can be sealed to prevent hydraulic oil from sliding out from the gap between the outer cylinder 1 and the outer slide rod 3 when the outer cylinder 1 slides vertically.

[0027] The top of the inner cylinder rod 6 is provided with a vertical threaded hole 9, and the top center of the outer slide rod 3 is provided with a vertical threaded hole, through which a vertical screw rod 10 is provided. The vertical screw rod 10 passes through the vertical threaded hole and is threadedly connected to the vertical threaded hole 9. In this embodiment, the vertical threaded hole 9 is provided at the center of the inner cylinder rod 6 and passes through the top of the inner cylinder rod 6. The inner cylinder rod 6 and the outer cylinder 1 can be connected by the vertical screw rod 10.

[0028] The bottom of the inner cylinder 4 is provided with a mounting base 11, which is fixedly connected to the middle of the bottom inner wall of the outer cylinder 1 by screws, and the top of the mounting base 11 is connected to the inner cylinder 4. In this embodiment, by providing the mounting base 11, the inner cylinder 4 can be fixedly connected to the middle of the bottom inner wall of the outer cylinder 1, and the axes of the outer cylinder 1 and the inner cylinder 4 are on the same straight line.

[0029] A bottom sealing groove 12 is provided on the bottom outer wall of the outer cylinder 1, and an outer sealing gasket is provided in the bottom sealing groove 12. In this embodiment, by providing a sealing gasket in the sealing groove 12, the outer cylinder 1 and the outer slide rod 3 can be further sealed.

[0030] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic cylinder with automatic compensation function, characterized in that, include: The outer cylinder has an opening at its top and an external oil hole on its bottom side wall, the external oil hole being connected to an oil pipe. An outer sliding rod slides vertically within an outer cylinder. The outer sliding rod has a hollow structure and an opening at its bottom. The interior of the outer sliding rod communicates with the outer cylinder. The inner cylinder is fixedly connected to the bottom inner wall of the outer cylinder. A cylinder cover is provided on the top of the inner cylinder. An inner oil hole is provided on the side wall of the inner cylinder, and the inner oil hole is connected to an oil pipe. An inner cylinder rod is provided, the top of which extends out of the cylinder head and connects to the top inner wall of the outer slide rod. A piston is provided at the bottom of the inner cylinder rod, and the piston slides vertically in the inner cylinder.

2. A hydraulic cylinder with automatic compensation function according to claim 1, characterized in that, An outer sealing ring is provided on the inner wall of the top of the outer cylinder, and the outer sliding rod slides on the inner wall of the outer sealing ring.

3. A hydraulic cylinder with automatic compensation function according to claim 1, characterized in that, The top of the inner cylinder rod is provided with a vertical threaded hole, and the top center of the outer slide rod is provided with a vertical threaded hole. A vertical threaded rod is provided through the vertical threaded hole, and the vertical threaded rod passes through the vertical threaded hole and is threadedly connected to the vertical threaded hole.

4. A hydraulic cylinder with automatic compensation function according to claim 1, characterized in that, The bottom of the inner cylinder is provided with a mounting base, which is fixedly connected to the middle of the bottom inner wall of the outer cylinder by screws, and the top of the mounting base is connected to the inner cylinder.

5. A hydraulic cylinder with automatic compensation function according to claim 1, characterized in that, A bottom sealing groove is provided on the bottom outer wall of the outer cylinder, and an outer sealing gasket is provided in the bottom sealing groove.

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