A post support cylinder of a roof bolter

Abstract

The utility model relates to hydraulic pressure oil cylinder technical field, concretely relates to a back support oil cylinder of anchor excavator, including cylinder body, the cavity is established in cylinder body, the cavity is equipped with piston rod, the one end of piston rod projects cylinder body, the bottom of piston rod is equipped with round nut, round nut and cylinder body inner wall slide connection, the outer wall of round nut is equipped with piston seal, the terminal of cylinder body is equipped with guide sleeve, the guide sleeve is equipped on piston rod, the inner wall of guide sleeve is equipped with piston rod seal, the cavity includes rod cavity and no rod cavity, the side of rod cavity is equipped with first oil port, first oil port is connected with oil pipe, the bottom of no rod cavity is equipped with passageway, the terminal of passageway is equipped with second oil port, second oil port is located at the bottom of cylinder body. The utility model improves the installation space of back support oil cylinder, reduces the risk of bending caused by the interference of piston rod swing with surrounding components, improves its reliability and durability in narrow environment.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a rear support cylinder for a tunneling and anchoring machine. Background Technology

[0002] In the field of hydraulic support in engineering machinery, the rear support cylinder is usually installed in a confined space. During its extension, the piston rod is susceptible to oscillation due to external loads or installation deviations. This oscillation causes the piston rod to bear lateral forces, which in turn leads to bending deformation of the piston rod, seriously affecting the working stability and service life of the hydraulic cylinder.

[0003] Traditional rear-support cylinders suffer from limited installation space due to structural dimensions, and the piston rod is prone to interference with surrounding components during swing, increasing the risk of bending. While some existing technologies improve bending resistance by reinforcing the piston rod material or increasing the guide sleeve length, they fail to fundamentally solve the swinging problem caused by space constraints. Furthermore, optimizations to the oil port layout primarily focus on simplifying piping arrangements, without addressing specific design considerations for dynamic swinging conditions. Therefore, there is an urgent need for a compact rear-support cylinder with excellent anti-swing performance to improve its reliability and durability in confined environments. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a rear support cylinder for a tunneling and anchoring machine. By optimizing the cylinder structure, the structure layout is made more compact, the installation space of the rear support cylinder is expanded, and the anti-sway performance of the cylinder is improved.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A rear support cylinder for a roadheader includes a cylinder body with a cavity inside. A piston rod is disposed within the cavity, with one end of the piston rod extending out of the cylinder body. A round nut is disposed at the bottom of the piston rod and is slidably connected to the inner wall of the cylinder body. A piston seal is disposed on the outer wall of the round nut. A guide sleeve is disposed at the end of the cylinder body and is fitted onto the piston rod. A piston rod seal is disposed on the inner wall of the guide sleeve. The cavity includes a rod chamber and a rodless chamber. A first oil port is disposed on the side of the rod chamber and is connected to an oil pipe. A channel is disposed at the bottom of the rodless chamber, and a second oil port is disposed at the end of the channel. The second oil port is located at the bottom of the cylinder body.

[0007] As a further embodiment of this utility model: a first sealing ring is provided between the round nut and the piston rod.

[0008] As a further embodiment of this utility model: a set screw is provided at the bottom of the round nut, and the set screw is located at the connection between the round nut and the bottom of the piston rod.

[0009] As a further improvement of this utility model, a second sealing ring is provided between the guide sleeve and the inner wall of the cylinder.

[0010] As a further improvement of this utility model, the inner wall of the guide sleeve is provided with several guide rings to prevent the piston rod from deviating.

[0011] As a further improvement of this utility model, the inner wall of the guide sleeve is also provided with a dustproof ring.

[0012] As a further improvement of this utility model: a relaxation plate is provided at the end of the cylinder body, and the relaxation plate is placed at the connection between the guide sleeve and the cylinder body.

[0013] As a further improvement of this utility model, a pin hole is provided at one end of the piston rod extending out of the cylinder.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention optimizes the structure and port layout of the rear support cylinder, making the rear support cylinder structure more compact, increasing the installation space of the rear support cylinder, reducing the risk of bending caused by interference between the piston rod and surrounding components when the piston rod swings, and improving its reliability and durability in confined environments. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the rear support cylinder of the excavator and anchor machine according to this utility model;

[0017] In the diagram: 1. Cylinder block; 2. Cavity; 21. Rod chamber; 22. Rodless chamber; 3. Piston rod; 4. Round nut; 5. Piston seal; 6. Guide sleeve; 7. Piston rod seal; 8. First oil port; 9. Oil pipe; 10. Channel; 11. Second oil port; 12. First sealing ring; 13. Set screw; 14. Second sealing ring; 15. Guide ring; 16. Dust seal; 17. Loosening plate; 18. Pin hole. Detailed Implementation

[0018] 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.

[0019] refer to Figure 1A rear support cylinder for a tunneling and anchoring machine includes a cylinder body 1, a cavity 2 inside the cylinder body 1, a piston rod 3 inside the cavity 2, one end of the piston rod 3 extending out of the cylinder body 1, a round nut 4 at the bottom of the piston rod 3, the round nut 4 being slidably connected to the inner wall of the cylinder body 1, a piston seal 5 on the outer wall of the round nut 4, a guide sleeve 6 at the end of the cylinder body 1, the guide sleeve 6 being fitted onto the piston rod 3, a piston rod seal 7 on the inner wall of the guide sleeve 6, the cavity 2 including a rod chamber 21 and a rodless chamber 22, a first oil port 8 on the side of the rod chamber 21 being connected to an oil pipe 9, a channel 10 at the bottom of the rodless chamber 22, a second oil port 11 at the end of the channel 10, the second oil port 11 being located at the bottom of the cylinder body 1.

[0020] A first sealing ring 12 is provided between the round nut 4 and the piston rod 3.

[0021] The bottom of the round nut 4 is provided with a set screw 13, which is located at the connection between the round nut 4 and the bottom of the piston rod 3.

[0022] A second sealing ring 14 is provided between the guide sleeve 6 and the inner wall of the cylinder 1.

[0023] The inner wall of the guide sleeve 6 is provided with several guide rings 15 to prevent the piston rod 3 from deviating.

[0024] The inner wall of the guide sleeve 6 is also provided with a dustproof ring 16.

[0025] The cylinder body 1 has a release plate 17 at its end, which is located at the connection between the guide sleeve 6 and the cylinder body 1.

[0026] The piston rod 3 has a pin hole 18 at one end extending out of the cylinder 1.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rear support cylinder for a roadheader, comprising a cylinder body (1), wherein a cavity (2) is provided inside the cylinder body (1), and a piston rod (3) is provided inside the cavity (2), one end of the piston rod (3) extending out of the cylinder body (1), characterized in that: The bottom of the piston rod (3) is provided with a round nut (4), which is slidably connected to the inner wall of the cylinder (1). The outer wall of the round nut (4) is provided with a piston seal (5). The end of the cylinder (1) is provided with a guide sleeve (6), which is sleeved on the piston rod (3). The inner wall of the guide sleeve (6) is provided with a piston rod seal (7). The cavity (2) includes a rod cavity (21) and a rodless cavity (22). The side of the rod cavity (21) is provided with a first oil port (8), which is connected to an oil pipe (9). The bottom of the rodless cavity (22) is provided with a channel (10), and the end of the channel (10) is provided with a second oil port (11). The second oil port (11) is located at the bottom of the cylinder (1).

2. The rear support cylinder of the roadheader according to claim 1, characterized in that: A first sealing ring (12) is provided between the round nut (4) and the piston rod (3).

3. The rear support cylinder of the roadheader according to claim 2, characterized in that: The bottom of the round nut (4) is provided with a set screw (13), which is located at the connection between the bottom of the round nut (4) and the piston rod (3).

4. The rear support cylinder of the roadheader according to claim 3, characterized in that: A second sealing ring (14) is provided between the guide sleeve (6) and the inner wall of the cylinder (1).

5. The rear support cylinder of the roadheader according to claim 4, characterized in that: The inner wall of the guide sleeve (6) is provided with several guide rings (15) to prevent the piston rod (3) from deviating.

6. The rear support cylinder of the roadheader according to claim 5, characterized in that: The inner wall of the guide sleeve (6) is also provided with a dustproof ring (16).

7. The rear support cylinder of the roadheader according to claim 6, characterized in that: The cylinder (1) is provided with a relaxation piece (17) at its end, and the relaxation piece (17) is placed at the connection between the guide sleeve (6) and the cylinder (1).

8. The rear support cylinder of the roadheader according to claim 7, characterized in that: The piston rod (3) has a pin hole (18) at one end extending out of the cylinder (1).

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