Pushing jack with hard protection

Abstract

The utility model relates to the technical field of hoisting, in particular to a pushing jack with hard protection, which comprises a piston rod, a piston and a cylinder bottom ring are respectively arranged at two ends of the piston rod, the piston is sealed and movably inserted in a cylinder barrel, a guide sleeve and an ear ring are respectively arranged at two ends of the cylinder barrel, the guide sleeve is sealed and movably connected with the outer wall of the piston rod, and the ear ring is arranged on the opposite side of the cylinder bottom ring. The cylinder barrel is movably sleeved with a protective outer barrel, a connecting sleeve is arranged at one end of the protective outer barrel, and the piston rod close to one side of the cylinder bottom ring penetrates through the connecting sleeve. According to the pushing jack with the hard protection, the piston rod is protected under the condition that original hoisting and lifting are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of lifting technology, specifically a push jack with rigid protection. Background Technology

[0002] Jacks are a common type of lifting equipment. According to their technology, jacks can be divided into: mechanical jacks, such as rack and pinion jacks and screw jacks; hydraulic jacks, such as single-acting hydraulic jacks, double-acting hydraulic jacks, and split hydraulic jacks; pneumatic jacks; electric jacks; and special jacks, such as scissor jacks and horizontal jacks.

[0003] The function of a jack is to provide vertical lifting force through mechanical or hydraulic principles, and it is used in fields such as automotive repair, construction, industry, metallurgy, and mining. It is especially widely used in mining equipment. Due to the harsh environment of mines, the smooth outer wall of the piston rod will be worn and corroded, thereby shortening the service life of the piston rod. In severe cases, the sealing performance of the piston rod will be greatly reduced, resulting in a decrease in pressure bearing capacity, and even inducing safety accidents. Utility Model Content

[0004] In order to solve the technical problems existing in the background art, this utility model provides a push jack with hard protection, which protects the piston rod while ensuring the original lifting and hoisting conditions.

[0005] The technical solution adopted by this utility model is:

[0006] Hard-safe push jacks include:

[0007] The device includes: a piston rod, with a piston and a cylinder bottom ring respectively at both ends of the piston rod; the piston is sealed and movably inserted into the cylinder; a guide sleeve and an ear ring are respectively provided at both ends of the cylinder; the guide sleeve is sealed and movably connected to the outer wall of the piston rod; the ear ring is located on the opposite side of the cylinder bottom ring; a protective outer cylinder is movably fitted outside the cylinder; a connecting sleeve is provided at one end of the protective outer cylinder; and the piston rod near the cylinder bottom ring passes through the connecting sleeve.

[0008] Furthermore, an oil pipe is provided axially inside the piston rod, and two oil pipes are arranged side by side and extend towards the piston to the end of the piston rod.

[0009] Furthermore, an inner oil port is provided on the outer wall of the piston rod inside the cylinder, and the inner oil port is connected to one of the oil pipes;

[0010] An external oil port is provided on the outer wall of the piston rod extending to the outside of the connecting sleeve. There are two external oil ports, which are respectively connected to two parallel oil pipes.

[0011] Furthermore, a sealing plug is provided on the oil pipe connecting the end of the piston rod to the inner oil port.

[0012] Furthermore, the oil pipe opening and the inner oil port at the end of the piston rod are respectively located on both sides of the piston.

[0013] Furthermore, the piston and piston rod are coaxial and fixedly connected.

[0014] Furthermore, the guide sleeve is coaxial with and fixedly connected to the cylinder.

[0015] Furthermore, the connecting sleeve is coaxial with and fixedly connected to the end of the protective outer cylinder.

[0016] Furthermore, the piston rod is coaxial with and fixedly connected to the connecting sleeve.

[0017] Furthermore, piston rings are respectively provided on the outer wall of the cylinder and the inner wall of the protective outer cylinder.

[0018] The beneficial effects of this utility model of a push jack with hard protection are as follows:

[0019] The piston rod is protected by a protective outer cylinder to prevent wear and corrosion caused by harsh working conditions. Attached Figure Description

[0020] Figure 1 This is a front view schematic diagram of the contracted state of this utility model embodiment;

[0021] Figure 2 This is a front view schematic diagram of the extended state of an embodiment of this utility model.

[0022] In the picture:

[0023] 10. Piston rod; 11. Oil pipe; 12. Piston; 13. Inner oil port; 14. Outer oil port; 15. Plug; 16. Cylinder bottom ring.

[0024] 20. Cylinder barrel; 21. Guide sleeve; 22. Earring.

[0025] 30. Protective outer cylinder; 31. Connecting sleeve. Detailed Implementation

[0026] To more clearly and explicitly illustrate the specific implementation objectives and methods of this utility model, the technical solution of this utility model will be fully described below. The described embodiments are only some embodiments of this utility model, not all embodiments. Without creative effort, all other embodiments based on the described embodiments of this utility model are within the protection scope of this utility model.

[0027] This utility model relates to a push jack with rigid protection, such as... Figure 1 , Figure 2 As shown, it includes:

[0028] A piston rod 10 is provided at both ends of which a piston 12 and a cylinder bottom ring 16 are respectively provided. The piston 12 is coaxial with the piston rod 10 and fixedly connected. An oil pipe 11 is provided axially inside the piston rod 10. Two oil pipes 11 are arranged side by side and extend towards the piston 12 to the end of the piston rod 10. An inner oil port 13 is provided on the outer wall of the piston rod 10 inside the cylinder 20. The inner oil port 13 is connected to one of the oil pipes 11. A sealing plug 15 is provided on the oil pipe 11 at the end of the piston rod 10 that is connected to the inner oil port 13. An outer oil port 14 is provided on the outer wall of the piston rod 10 near the cylinder bottom ring 16. Two outer oil ports 14 are provided and are respectively connected to two parallel oil pipes 11. The open oil pipe 11 opening and the inner oil port 13 at the end of the piston rod 10 are respectively provided on both sides of the piston 12.

[0029] The piston 12 is sealed and movably inserted into the cylinder 20. The cylinder 20 is provided with a guide sleeve 21 and an ear ring 22 at both ends. The guide sleeve 21 is coaxial with the cylinder 20 and fixedly connected. The guide sleeve 21 is sealed and movably connected to the outer wall of the piston rod 10. The ear ring 22 is located on the opposite side of the cylinder bottom ring 16. The outer wall of the cylinder 20 is fitted with a piston inner ring that is slidably connected to the inner wall of the protective outer cylinder 30.

[0030] A protective outer sleeve 30 is movably sleeved on the cylinder 20. A connecting sleeve 31 is coaxially and fixedly connected to one end of the protective outer sleeve 30. The piston rod 10, which is close to the cylinder bottom ring 16, passes through the connecting sleeve 31. The piston rod 10 is coaxial with the connecting sleeve 31 and fixedly connected, so that the cylinder bottom ring 16 is located outside the connecting sleeve 31. A piston outer ring that is slidably connected to the outer wall of the cylinder 20 is clamped on the inner wall of the protective outer sleeve 30.

[0031] Based on the specific structure of the push jack with rigid protection in the above embodiments, its working process will be further explained below:

[0032] A. Stretching process:

[0033] Hydraulic oil is supplied from the outer oil port 14 to the oil pipe 11 without the inner oil port 13, so that the space of the piston 12 and the cylinder 20 is filled with hydraulic oil. At the same time, the hydraulic oil in the space of the piston rod 10, piston 12, cylinder 20 and guide sleeve 21 flows to another oil pipe 11 until it flows out from another outer oil port 14.

[0034] The cylinder barrel 20 extends from the protective outer cylinder 30, and the lug 22 moves axially away from the cylinder bottom ring 16, as follows: Figure 2 As shown.

[0035] B. Contraction process;

[0036] Hydraulic oil is supplied from the outer oil port 14 to the oil pipe 11 with the inner oil port 13, so that the space of piston rod 10, piston 12, cylinder 20 and guide sleeve 21 is filled with hydraulic oil. At the same time, the hydraulic oil in the space of piston 12 and cylinder 20 flows to another oil pipe 11 until it flows out from another outer oil port 14.

[0037] The cylinder barrel 20 retracts into the protective outer cylinder 30, and the lug 22 moves axially into the cylinder bottom ring 16 until it retracts to... Figure 1 The state shown.

[0038] During the aforementioned extension and contraction process, the piston rod 10 is always inside the cylinder 20 or inside the cylinder 20 and the protective outer cylinder 30.

[0039] In summary, the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Based on the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification. All equivalent variations and modifications of the shape, structure, features, and spirit described in the claims of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A push jack with hard protection, characterized in that it comprises: a piston rod (10) provided with a piston (12) and a cylinder bottom ring (16) at both ends, respectively, the piston (12) being sealingly and movably inserted into a cylinder barrel (20) provided with a guide sleeve (21) and an ear ring (22) at both ends, respectively, the guide sleeve (21) being sealingly and movably connected to the outer wall of the piston rod (10), and the ear ring (22) being arranged on the opposite side of the cylinder bottom ring (16), a protective outer cylinder (30) being movably arranged outside the cylinder barrel (20), one end of the protective outer cylinder (30) being provided with a connecting sleeve (31), and the piston rod (10) near the cylinder bottom ring (16) penetrating the connecting sleeve (31).

2. The push jack with hard protection according to claim 1, characterized in that: an oil pipe (11) is arranged axially in the piston rod (10), two oil pipes (11) being arranged side by side and extending to the end of the piston rod (10) towards the piston (12).

3. The push jack with hard protection according to claim 2, characterized in that: an inner oil port (13) is arranged on the outer wall of the piston rod (10) in the cylinder barrel (20), the inner oil port (13) being in communication with one of the oil pipes (11); an outer oil port (14) is arranged on the outer wall of the piston rod (10) extending to the outside of the connecting sleeve (31), the outer oil port (14) being provided with two and being in communication with the two side-by-side oil pipes (11), respectively.

4. The push jack with hard protection according to claim 3, characterized in that: a plugging head (15) is sealingly arranged on the oil pipe (11) in communication with the inner oil port (13) at the end of the piston rod (10).

5. The push jack with hard protection according to claim 3 or 4, characterized in that: the oil pipe (11) opening at the end of the piston rod (10) and the inner oil port (13) are arranged on both sides of the piston (12), respectively.

6. The push jack with hard protection according to claim 1, characterized in that: the piston (12) is coaxial with and fixedly connected to the piston rod (10).

7. The push jack with hard protection according to claim 1, characterized in that: the guide sleeve (21) is coaxial with and fixedly connected to the cylinder barrel (20).

8. The push jack with hard protection according to claim 1, characterized in that: the connecting sleeve (31) is coaxial with and fixedly connected to the end of the protective outer cylinder (30).

9. The push jack with hard protection according to claim 1, characterized in that: the piston rod (10) is coaxial with and fixedly connected to the connecting sleeve (31).

10. The push jack with hard protection according to claim 1, characterized in that: piston rings are arranged on the outer wall of the cylinder barrel (20) and the inner wall of the protective outer cylinder (30), respectively. ​

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