Propulsion oil cylinder with fixed piston rod direction
By designing the combination of slide rail and guide wheel on the piston rod of the propulsion cylinder, the problem of push pipe sheet deflection caused by the rotation of the piston rod is solved, and the direction of the piston rod is fixed is achieved, and the stability and safety of the propulsion process are improved.
Patent Information
- Application Number
- CN202420636959.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-29
AI Technical Summary
During the propulsion process of the shield machine and the TBM boring machine, the piston rod of the oil cylinder is easily rotated during the expansion and contraction process, resulting in the position of the push pipe piece supporting device deflection, which cannot effectively fit the end surface of the pipe piece, which can easily damage the pipe piece or touch it The inner wall of the equipment housing causes interference.
A propulsion oil cylinder with a fixed direction of the piston rod is designed. By opening a slide rail parallel to the axis direction on the outer wall of the piston rod, and installing a guide wheel on the outside of the guide sleeve, the guide wheel rolls in the slide rail to ensure that the direction of the piston rod is fixed. .
It effectively prevents the piston rod from rotating during the expansion and contraction process, ensures a stable fit of the push pipe piece, avoids damage to the pipe piece and interference with the inner wall of the equipment, and improves the stability and safety of the propulsion process.
Smart Images
Figure CN222457933U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil cylinders, in particular to a propulsion oil cylinder with a fixed piston rod direction. Background Art
[0002] During the operation of shield machines and TBM equipment, the forward movement is achieved by the thrust cylinder acting on the segments, which in turn pushes the shield machines and TBM equipment forward. Since the cylinder barrel, piston, piston rod, and guide sleeve of the thrust cylinder are all circular and the direction cannot be controlled, the piston rod will rotate when it is extended and retracted during the advancement process, which will cause the position of the support device for pushing the segment to deflect, and it will not fit well with the end face of the segment, resulting in poor force, easy damage to the segment, and may also touch the inner wall of the equipment shell and cause interference.
[0003] In order to correct the deflection, some construction workers manually correct it on site, some connect two oil cylinders side by side, and some install support legs on the top support device. However, the manual correction by construction workers on site will increase the labor intensity of workers and reduce the advancement speed of construction; connecting two oil cylinders side by side cannot solve the problem of piston rod rotation of a single oil cylinder; installing support legs on the top support device makes it difficult to control the support strength and gap, and cannot completely solve the problem of piston rod rotation of the oil cylinder. Utility Model Content
[0004] The purpose of the utility model is to provide a propulsion cylinder with a fixed piston rod direction to solve the following technical problems:
[0005] How to prevent the piston rod of the cylinder from rotating in the process of extension and retraction.
[0006] The purpose of the utility model can be achieved through the following technical solutions:
[0007] A propulsion oil cylinder with a fixed piston rod direction, comprising a housing, wherein the housing comprises a shell tube and an oil inlet provided at one end of the housing; and further comprising:
[0008] A guide sleeve, the guide sleeve being mounted on the other end of the shell tube;
[0009] A piston assembly, the piston assembly comprising a piston rod and a piston pad connected to one end of the piston rod, the piston rod being movably inserted in a guide sleeve, and the piston pad being movably inserted in a shell tube; a slide rail parallel to the axial direction is provided on the outer wall of the piston rod, and a communicating hollow cavity is provided inside the piston rod and the piston pad;
[0010] The guide mechanism comprises a support and a guide wheel installed on the support, the support is installed on the outside of the guide sleeve, and the guide wheel is rollingly arranged in the slide rail.
[0011] As a further solution of the utility model: an oil return mechanism is installed at one end of the shell tube close to the oil inlet, and the oil return mechanism includes an oil return flange, an oil return pipe and an oil return port; the oil return pipe is connected to the center of one end of the oil return flange, and the oil return port is opened at the oil return port and is connected to the oil return pipe; the oil return flange is installed on the end face of the shell tube, and the oil return pipe is penetrated through the hollow cavity.
[0012] As a further solution of the utility model: the guide sleeve includes a collar and a guide flange concentrically connected to one end of the collar, the collar is passed through one end of the shell tube, and the guide flange is fixedly installed on the end face of the shell tube.
[0013] As a further solution of the utility model: the end of the piston rod close to the guide sleeve is connected to a ball head, and a supporting mechanism is installed on the ball head.
[0014] As a further solution of the utility model: the top supporting mechanism includes a supporting plate, a supporting block and a ball cap, the supporting plate and the ball cap are respectively connected to two ends of the supporting plate, and the ball cap is sleeved on the ball head.
[0015] As a further solution of the utility model: the ball head and the ball cap are respectively provided with pin holes corresponding to each other, and pins are passed through the pin holes.
[0016] Beneficial effects of the utility model:
[0017] The utility model realizes the piston movement of the piston assembly through the oil return mechanism. When oil is fed into the oil inlet, the oil enters the rodless cavity at the rear of the piston pad for filling. When the oil return port returns the oil, the piston rod extends toward the front end of the shell tube. When oil is fed into the oil return port, the oil enters the hollow cavity for filling. When the oil return port returns the oil, the piston rod contracts toward the end of the shell tube, thereby realizing the telescopic movement of the piston rod. When the piston rod is telescoped, the guide wheel rolls back and forth in the middle, so that the direction of the piston rod is fixed and rotation will not occur. Moreover, when the guide wheel rolls, it is not continuous direct friction between surfaces, but rolling friction, so the resistance is very small, and the telescopic movement of the piston rod will not be restricted, and the friction damage to the piston rod can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The utility model is further described below in conjunction with the accompanying drawings.
[0019] Figure 1 This is a structural schematic diagram of a propulsion oil cylinder with a fixed piston rod direction according to an embodiment of the utility model;
[0020] Figure 2 This is an exploded view of a propulsion cylinder with a fixed piston rod direction according to an embodiment of the utility model;
[0021] Figure 3It is a cross-sectional view of a propulsion oil cylinder with a fixed piston rod direction according to an embodiment of the utility model;
[0022] Figure 4 It is a structural schematic diagram of a housing in a propulsion oil cylinder with a fixed piston rod direction according to an embodiment of the utility model;
[0023] Figure 5 This is a structural schematic diagram of a guide sleeve in a propulsion oil cylinder with a fixed piston rod direction according to an embodiment of the utility model;
[0024] Figure 6 This is a structural schematic diagram of a piston assembly in a propulsion oil cylinder with a fixed piston rod direction according to an embodiment of the utility model;
[0025] Figure 7 It is a structural schematic diagram of a top supporting mechanism in a propulsion oil cylinder with a fixed piston rod direction according to an embodiment of the utility model;
[0026] Figure 8 It is a structural schematic diagram of an oil return mechanism in a propulsion oil cylinder with a fixed piston rod direction according to an embodiment of the utility model;
[0027] Fig. 9 The utility model is a structural schematic diagram of a guide mechanism in a propulsion oil cylinder with a fixed piston rod direction according to an embodiment of the utility model.
[0028] In the figure: 100, outer shell; 101, shell tube; 102, oil inlet; 200, guide sleeve; 201, collar; 202, guide flange; 300, piston assembly; 301, piston rod; 302, piston pad; 303, hollow cavity; 304, ball head; 305, slide rail; 400, top support mechanism; 401, support plate; 402, support block; 403, ball cap; 500, pin; 600, oil return mechanism; 601, oil return flange; 602, oil return pipe; 603, oil return port; 700, guide mechanism; 701, support; 702, guide wheel. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] See also Figure 1-2 As shown, the utility model is a propulsion cylinder with a fixed piston rod direction, comprising a housing 100, a guide sleeve 200, a piston assembly 300, a top support mechanism 400, a pin 500 and an oil return mechanism 600; wherein, Figure 4 As shown, the housing 100 is composed of a shell tube 101 and an oil inlet 102 opened on the shell tube 101. The front end of the shell tube 101 is open and has a plurality of thread holes. The oil inlet 102 is opened on the rear end side wall of the shell tube 101. A thread hole is also opened on the end face of the rear end of the shell tube 101. A through hole concentric with the shell tube 101 is opened at the center of the end face of the rear end of the shell tube 101, and a sealing structure is also provided on the inner wall of the through hole.
[0031] See also Figure 3 and Figure 5 The guide sleeve 200 is composed of a collar 201 and a guide flange 202. The guide flange 202 is concentrically connected to the collar 201, and the inner diameter of the guide flange 202 is the same as that of the collar 201. A plurality of thread holes corresponding to the front end of the shell tube 101 are opened on the guide flange 202. The collar 201 is penetrated through the front end of the shell tube 101, and the guide flange 202 is fixedly mounted on the end face of the front end of the shell tube 101 by nailing through the corresponding thread holes. A sealing structure is also provided on the inner wall of the collar 201.
[0032] See also Figure 3 and Figure 6 The piston assembly 300 is composed of a piston rod 301, a piston pad 302, a hollow cavity 303, a ball head 304, and a slide rail 305 opened on the piston rod 301. The piston pad 302 and the ball head 304 are fixedly connected to the two ends of the piston rod 301 respectively. The hollow cavity 303 is opened at the center of the piston rod 301 and the piston pad 302, and the hollow cavity 303 is located at one end of the piston pad 302 and is open, and a sealing structure is provided on the inner wall of the opening position; the other end is closed; the ball head 304 is open A pin hole is provided, and the axial direction of the pin hole is perpendicular to the axial direction of the hollow cavity 303; the slide rail 305 is opened on the outer wall of the piston rod 301, and the track direction of the slide rail 305 is parallel to the axial direction of the hollow cavity 303; the piston pad 302 is located inside the shell tube 101, and the piston rod 301 is inserted into the ring 201 and can be extended and retracted along the ring 201, and the sealing structure on the inner wall of the guide flange 202 has a sealing effect on the piston rod 301; the ball head 304 is located outside the shell tube 101.
[0033] See also Figure 3 and Figure 7 The top supporting mechanism 400 is composed of a supporting plate 401, a supporting block 402 and a ball cap 403. The supporting block 402 and the ball cap 403 are respectively connected to the two ends of the supporting plate 401, wherein the ball cap 403 is provided with two symmetrical pin holes, which correspond to the pin holes on the ball head 304; the interior of the ball cap 403 is consistent with the shape of the ball head 304, the ball cap 403 is sleeved on the ball head 304, and the pin holes of the two correspond to each other, and the pin 500 is inserted into the corresponding pin hole, thereby realizing the fixed connection between the ball cap 403 and the ball head 304.
[0034] See also Figure 3 and Figure 8 The oil return mechanism 600 is composed of an oil return flange 601, an oil return pipe 602 and an oil return port 603. The oil return pipe 602 is connected to the center of one end of the oil return flange 601. The oil return port 603 is opened on the side wall of the oil return flange 601, and the oil return port 603 is communicated with one end of the oil return pipe 602 connected to the oil return flange 601. The oil return pipe 602 is penetrated through the through hole on the rear end face of the shell tube 101 and extends into the hollow cavity 303. The sealing structure on the inner wall of the through hole at the rear end of the shell tube 101 and the sealing structure on the inner wall of the opening of the hollow cavity 303 at the piston pad 302 both form a sealing effect on the oil return pipe 602. The oil return flange 601 is provided with a thread hole corresponding to the thread hole on the rear end face of the shell tube 101, and the oil return flange 601 is fixedly installed at the rear end of the shell tube 101 by nailing the corresponding thread hole.
[0035] See also Figure 3 and Fig. 9 The guide mechanism 700 is composed of a support 701 and a guide wheel 702. Corresponding thread holes are set on the support 701 and the guide flange 202, and are fixedly connected by nailing through the corresponding thread holes. The guide wheel 702 is installed on the support 701, and the guide wheel 702 is rollingly set in the slide rail 305 of the piston rod 301.
[0036] The working principle of this utility model:
[0037] During operation, the piston movement of the piston assembly 300 is realized by the oil return mechanism 600. When oil is introduced into the oil inlet 102, the oil enters the rodless cavity at the rear of the piston pad 302 for filling. When the oil return port 603 returns the oil, the piston rod 301 extends toward the front end of the shell tube 101. When oil is introduced into the oil return port 603, the oil enters the hollow cavity 303 for filling. When the oil return port 102 returns the oil, the piston rod 301 contracts toward the end of the shell tube 101, thereby realizing the telescopic movement of the piston rod 301. When the piston rod 301 is telescoped, the guide wheel 702 rolls back and forth in the slide rail 305, so that the direction of the piston rod 301 is fixed and no rotation occurs. When the guide wheel 702 rolls in the slide rail 305, it is not a continuous direct friction between the surfaces, but a rolling friction. Therefore, the resistance is very small, and the telescopic movement of the piston rod 301 will not be restricted, and the friction damage to the piston rod 301 can also be reduced.
[0038] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0040] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.
Claims
1. A propulsion oil cylinder with a fixed piston rod direction, comprising a housing (100), wherein the housing (100) comprises a shell tube (101) and an oil inlet (102) arranged at one end of the housing (100); characterized in that: Also includes: A guide sleeve (200), wherein the guide sleeve (200) is installed at the other end of the shell tube (101); A piston assembly (300), the piston assembly (300) comprising a piston rod (301) and a piston pad (302) connected to one end of the piston rod (301), the piston rod (301) being movably disposed in a guide sleeve (200), and the piston pad (302) being movably disposed in a shell tube (101); a slide rail (305) parallel to the axial direction is provided on the outer wall of the piston rod (301), and a communicating hollow cavity (303) is provided inside the piston rod (301) and the piston pad (302); A guide mechanism (700), the guide mechanism (700) comprising a support (701) and a guide wheel (702) mounted on the support (701), the support (701) being mounted on the outside of the guide sleeve (200), and the guide wheel (702) being rollingly arranged in the slide rail (305).
2. The propulsion cylinder with a fixed piston rod direction according to claim 1, characterized in that: An oil return mechanism (600) is installed at one end of the shell tube (101) close to the oil inlet (102), and the oil return mechanism (600) comprises an oil return flange (601), an oil return pipe (602) and an oil return port (603); the oil return pipe (602) is connected to the center of one end of the oil return flange (601), and the oil return port (603) is opened in the oil return flange (601) and communicated with the oil return pipe (602); the oil return flange (601) is installed on the end surface of the shell tube (101), and the oil return pipe (602) is penetrated through the hollow cavity (303).
3. The propulsion cylinder with a fixed piston rod direction according to claim 1, characterized in that: The guide sleeve (200) comprises a collar (201) and a guide flange (202) coaxially connected to one end of the collar (201); the collar (201) is inserted through one end of the shell tube (101); and the guide flange (202) is fixedly mounted on the end surface of the shell tube (101).
4. The propulsion cylinder with a fixed piston rod direction according to claim 3, characterized in that: One end of the piston rod (301) close to the guide sleeve (200) is connected to a ball head (304), and a supporting mechanism (400) is installed on the ball head (304).
5. The propulsion cylinder with a fixed piston rod direction according to claim 4, characterized in that: The top supporting mechanism (400) comprises a supporting plate (401), a supporting block (402) and a ball cap (403); the supporting plate (401) and the ball cap (403) are respectively connected to two ends of the supporting plate (401); and the ball cap (403) is sleeved on the ball head (304).
6. The propulsion cylinder with a fixed piston rod direction according to claim 5, characterized in that: The ball head (304) and the ball cap (403) are respectively provided with pin holes corresponding to each other, and a pin (500) is passed through the pin holes.