Protective device for piston rod of oil cylinder of shield lithotripter

Abstract

The utility model provides a shield lithotripter oil cylinder piston rod protection device which comprises an installation plate, a through hole is formed in the surface of the installation plate, a connecting box is fixedly installed on the front side of the installation plate, and a protection mechanism is arranged in an inner cavity of the connecting box. The protection mechanism comprises a servo motor, a threaded rod, a threaded sleeve, a connecting rod, a connecting ring, a corrugated pipe, a fixing block, a spring and a protection pad, external dirt, dust and other particles possibly causing abrasion can be isolated through the corrugated pipe, direct friction between the piston rod and the sealing piece is reduced, the service life of the sealing piece is prolonged, and the service life of the sealing piece is prolonged. In addition, due to the arrangement of the spring and the protection pad, certain impact and vibration can be absorbed, the mechanical stress on the piston rod is reduced, the maintenance cost is reduced, the downtime is shortened, the operation efficiency and reliability of the shield stone crusher are improved, and the service life of the piston rod is prolonged.

Description

Technical Field

[0001] The utility model relates to a protection device, in particular to a protection device for a piston rod of a shield crusher oil cylinder, and belongs to the technical field of shield crushers. Background Art

[0002] The shield crusher (also called the tail crusher of the shield machine) is a device installed at the tail of the shield machine in the tunnel. It is mainly used to process the gravel and soil residue brought out by the rotating excavation of the cutter disc during the shield construction process. This machine is designed to ensure that the conveying system behind the tunnel (such as the belt conveyor) will not be damaged by oversized stones. By crushing and grading the gravel, it can cooperate with the normal advancement of the shield machine and the smooth construction of the tunnel.

[0003] During the operation of the shield crusher, an oil cylinder is required to drive the crushing hammer or crushing plate of the crusher to move, so as to further crush the large stones or gravel generated during the tunnel cutting process. As one of the key components of the oil cylinder, the oil cylinder piston rod needs to be in direct contact with the external environment, withstand the pressure inside the oil cylinder and transmit it to the crushing mechanism. However, the existing shield crusher oil cylinder piston rod may lack protection measures. Since the shield construction environment is usually harsh, such as containing a large amount of highly abrasive dust and particles, if the piston rod surface is worn or damaged, it will affect the sealing performance and overall stability of the oil cylinder. In addition, if there are scratches or corrosion on the piston rod surface, it may also cause early wear and failure of the sealing ring, reduce the service life of the oil cylinder, and increase maintenance costs and downtime;

[0004] Therefore, a shield crusher oil cylinder piston rod protection device is proposed. Utility Model Content

[0005] In view of this, the utility model provides a shield crusher oil cylinder piston rod protection device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0006] The technical solution of the utility model is implemented as follows: it includes a mounting plate, a through hole is opened on the surface of the mounting plate, a connection box is fixedly installed on the front side of the mounting plate, and a protection mechanism is provided in the inner cavity of the connection box. The protection mechanism includes a servo motor, a threaded rod, a threaded sleeve, a connecting rod, a connecting ring, a bellows, a fixing block, a spring and a protection pad.

[0007] Further preferably, the servo motor is fixedly connected to the front end of the connecting box, the threaded rod is fixedly connected to the output end of the servo motor, the threaded sleeve is threadedly connected to the surface of the threaded rod, the connecting rod is fixedly connected to the bottom of the threaded sleeve, the connecting ring is fixedly connected to the lower end of the connecting rod, the bellows is fixedly connected to the rear side of the connecting ring, and the other end of the bellows is fixedly connected to the front side of the surface of the mounting plate.

[0008] Further preferably, the fixing block is fixedly connected to the four sides of the inner side of the connecting ring, the spring is fixedly connected to the inner side of the fixing block, and the protection pad is fixedly connected to the inner side of the spring.

[0009] Further preferably, a guide rod is fixedly mounted on the top of the threaded sleeve, a guide groove is opened on the top of the inner cavity of the mounting plate, and the upper end of the guide rod is slidably connected to the inner side of the guide groove.

[0010] Further preferably, a through slot is provided at the bottom of the mounting plate, and the connecting rod is connected to the connecting ring via the through slot.

[0011] Further preferably, a protective cover is threadedly connected to the front side of the connection box, and the servo motor is located inside the protective cover.

[0012] Further preferably, mounting bolts are threadedly connected around the surface of the mounting plate, and the other ends of the mounting bolts penetrate the mounting plate and extend to the rear side of the mounting plate.

[0013] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0014] 1. The utility model can prevent the piston rod from wear and corrosion and enhance the durability of the piston rod by setting a protective mechanism. The bellows can isolate external dirt, dust and other particles that may cause wear, reduce direct friction between the piston rod and the seal, extend the service life of the seal, and maintain the sealing of the hydraulic system. In addition, the setting of the spring and the protective pad can also absorb certain impacts and vibrations, reduce the mechanical stress on the piston rod, reduce maintenance costs, reduce downtime, improve the operating efficiency and reliability of the shield crusher, extend the service life of the piston rod itself, and also ensure the stable and efficient operation of the entire hydraulic system.

[0015] 2. The utility model can play a guiding role by setting the guide rod and the guide groove, avoid the displacement of the threaded sleeve during the movement, and improve the stability of the threaded sleeve during the movement. The servo motor can be protected by setting the protective cover to avoid external collision, which may cause the servo motor to malfunction. The mounting plate can be installed and fixed by setting the mounting bolts.

[0016] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a front view of the main structure of the utility model;

[0019] Figure 2 This is a rear view of the main structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the connection box in the utility model;

[0021] Figure 4 It is a schematic diagram of the connecting ring structure in the utility model.

[0022] Figure numerals: 1. mounting plate; 2. through hole; 3. connecting box; 4. protection mechanism; 401. servo motor; 402. threaded rod; 403. threaded sleeve; 404. connecting rod; 405. connecting ring; 406. bellows; 407. fixing block; 408. spring; 409. protection pad; 5. guide rod; 6. guide groove; 7. through groove; 8. protective cover; 9. mounting bolts. DETAILED DESCRIPTION

[0023] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0024] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0025] Example 1

[0026] like Figure 1-4As shown, the embodiment of the utility model provides a mounting plate 1, a through hole 2 is opened on the surface of the mounting plate 1, a connection box 3 is fixedly installed on the front side of the mounting plate 1, and a protection mechanism 4 is provided in the inner cavity of the connection box 3. The protection mechanism 4 includes a servo motor 401, a threaded rod 402, a threaded sleeve 403, a connecting rod 404, a connecting ring 405, a bellows 406, a fixing block 407, a spring 408 and a protection pad 409. The servo motor 401 is fixedly connected to the front end of the connection box 3, and the threaded rod 402 is fixedly connected to the servo motor 401. The output end of the threaded sleeve 403 is threadedly connected to the surface of the threaded rod 402, the connecting rod 404 is fixedly connected to the bottom of the threaded sleeve 403, the connecting ring 405 is fixedly connected to the lower end of the connecting rod 404, the bellows 406 is fixedly connected to the rear side of the connecting ring 405, and the other end of the bellows 406 is fixedly connected to the front side of the surface of the mounting plate 1, the fixing block 407 is fixedly connected to the inner side of the connecting ring 405, the spring 408 is fixedly connected to the inner side of the fixing block 407, and the protective pad 409 is fixedly connected to the inner side of the spring 408.

[0027] By setting up the protection mechanism 4, the piston rod can be prevented from wear and corrosion, and the durability of the piston rod can be enhanced. The bellows 406 can isolate external dirt, dust and other particles that may cause wear, reduce the direct friction between the piston rod and the seal, extend the service life of the seal, and maintain the sealing of the hydraulic system. In addition, the setting of the spring 408 and the protection pad 409 can also absorb certain impacts and vibrations, reduce the mechanical stress on the piston rod, reduce maintenance costs, reduce downtime, improve the operating efficiency and reliability of the shield crusher, extend the service life of the piston rod itself, and also ensure the stable and efficient operation of the entire hydraulic system.

[0028] Example 2

[0029] In one embodiment, a guide rod 5 is fixedly installed on the top of the threaded sleeve 403, a guide groove 6 is opened at the top of the inner cavity of the mounting plate 1, the upper end of the guide rod 5 is slidably connected to the inner side of the guide groove 6, a through groove 7 is opened at the bottom of the mounting plate 1, the connecting rod 404 is connected to the connecting ring 405 through the through groove 7, a protective cover 8 is threadedly connected to the front side of the connecting box 3, the servo motor 401 is located on the inner side of the protective cover 8, and mounting bolts 9 are threadedly connected on all sides of the surface of the mounting plate 1, and the other end of the mounting bolt 9 passes through the mounting plate 1 and extends to the rear side of the mounting plate 1.

[0030] By setting the guide rod 5 and the guide groove 6, a guiding role can be played to prevent the threaded sleeve 403 from being offset during movement, thereby improving the stability of the threaded sleeve 403 during movement. By setting the protective cover 8, the servo motor 401 can be protected to avoid external collisions that may cause malfunction of the servo motor 401. By setting the mounting bolts 9, the mounting plate 1 can be installed and fixed.

[0031] When the utility model is working: after the mounting plate 1 is installed to the working position by means of the mounting bolts 9, the oil cylinder passes through the through hole 2 and extends to the inner side of the bellows 406. When the oil cylinder piston rod extends to the front side, it passes through between the protection pads 409. At this time, the servo motor 401 is started to work. When the servo motor 401 is started, the threaded rod 402 at the output end is driven to rotate. While the threaded rod 402 rotates, the threaded sleeve 403 on the surface is driven to move to the front side through the effect of the threaded connection. While the threaded sleeve 403 moves, it drives the connecting rod 404 to move to the front side. Through the movement of the connecting rod 404, the connecting ring 405 is driven to move to the front side. While the connecting ring 405 moves, it drives the bellows 406 to extend to the front side, thereby protecting the extended section of the oil cylinder piston rod.

[0032] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A shield crusher oil cylinder piston rod protection device, characterized in that: The invention comprises a mounting plate (1), a through hole (2) being formed on a surface of the mounting plate (1), a connection box (3) being fixedly mounted on the front side of the mounting plate (1), an inner cavity of the connection box (3) being provided with a protection mechanism (4), the protection mechanism (4) comprising a servo motor (401), a threaded rod (402), a threaded sleeve (403), a connection rod (404), a connection ring (405), a bellows (406), a fixing block (407), a spring (408) and a protection pad (409).

2. A shield crusher oil cylinder piston rod protection device according to claim 1, characterized in that: The servo motor (401) is fixedly connected to the front end of the connection box (3); the threaded rod (402) is fixedly connected to the output end of the servo motor (401); the threaded sleeve (403) is threadedly connected to the surface of the threaded rod (402); the connecting rod (404) is fixedly connected to the bottom of the threaded sleeve (403); the connecting ring (405) is fixedly connected to the lower end of the connecting rod (404); the bellows (406) is fixedly connected to the rear side of the connecting ring (405); and the other end of the bellows (406) is fixedly connected to the front side of the surface of the mounting plate (1).

3. The shield crusher oil cylinder piston rod protection device according to claim 1, characterized in that: The fixing block (407) is fixedly connected to the four sides of the inner side of the connecting ring (405), the spring (408) is fixedly connected to the inner side of the fixing block (407), and the protection pad (409) is fixedly connected to the inner side of the spring (408).

4. The shield crusher oil cylinder piston rod protection device according to claim 1, characterized in that: A guide rod (5) is fixedly mounted on the top of the threaded sleeve (403), a guide groove (6) is provided on the top of the inner cavity of the mounting plate (1), and the upper end of the guide rod (5) is slidably connected to the inner side of the guide groove (6).

5. The shield crusher oil cylinder piston rod protection device according to claim 1, characterized in that: A through slot (7) is provided at the bottom of the mounting plate (1), and the connecting rod (404) is connected to the connecting ring (405) via the through slot (7).

6. The shield crusher oil cylinder piston rod protection device according to claim 1, characterized in that: A protective cover (8) is threadedly connected to the front side of the connection box (3), and the servo motor (401) is located on the inner side of the protective cover (8).

7. The shield crusher oil cylinder piston rod protection device according to claim 1, characterized in that: The mounting plate (1) has mounting bolts (9) threadedly connected to the four sides of its surface, and the other ends of the mounting bolts (9) penetrate the mounting plate (1) and extend to the rear side of the mounting plate (1).

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