Positioning and centering mechanism for sealing ring trimming machine

Abstract

The utility model discloses a positioning centering mechanism of sealing ring trimming machine, including installation platform, the top of installation platform is provided with three positioning table, the shape of three positioning table constitutes and is conical setting, the bottom of the bottom most positioning table is fixedly connected with installation platform, the top of installation platform is inserted with the electric push rod no. 1 of fixed connection with it, the telescopic end of electric push rod no. 1 is fixedly connected with the lifting rod, the top of lifting rod is inserted with the screw rod of screw connection with it. The utility model, through the conical positioning pin of three positioning table constitution, can let the positioning pin self -adaptation different inner diameter's sealing ring, after sealing ring is sleeved to the positioning pin, until sealing ring can not descend, can complete to sealing ring inner diameter's positioning, the clamping plate of umbrella shape setting of three clamping rings constitutes, through the control of the lifting of clamping plate, until the inside of clamping plate and sealing ring outside contact, can complete the final positioning of sealing ring.

Description

Technical Field

[0001] This utility model relates to the field of positioning technology for trimming machines, and more specifically, to a positioning and centering mechanism for a sealing ring trimming machine. Background Technology

[0002] On tunnel boring machines, sealing rings are used in systems such as the main bearing sealing system, the tail shield sealing system, and the hydraulic cylinder sealing components. During the production of sealing rings, a sealing ring trimming machine is needed to trim the sealing rings. In order to ensure that the sealing rings maintain a precise position during the trimming process, a positioning and centering mechanism for the sealing ring trimming machine is required.

[0003] In common applications of sealing ring trimming machine positioning, conical or mushroom-shaped locating pins are typically used to achieve initial positioning by engaging with the inner diameter of the sealing ring. Subsequently, multiple radially movable grippers evenly distributed around the circumference of the sealing ring move synchronously towards the center under the action of the drive system, uniformly contacting the outer edge of the sealing ring to complete the clamping of the ring's periphery and achieve final positioning. However, the sealing rings used in tunnel boring machines vary in size, requiring frequent replacement of locating pins of corresponding diameters when positioning sealing rings of different sizes, a time-consuming and labor-intensive process. Furthermore, using multiple grippers to hold the edge of the sealing ring can easily lead to deformation. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a positioning and centering mechanism for a sealing ring trimming machine, so as to solve the problem that it is necessary to frequently change the positioning pins of the corresponding diameter when positioning sealing rings of different sizes, and that the sealing rings are easily deformed during the processing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution;

[0006] The positioning and centering mechanism of the sealing ring trimming machine includes a mounting platform. Three positioning platforms are arranged on the top of the mounting platform, forming a conical shape. The bottom of the lowest positioning platform is fixedly connected to the mounting platform. An electric push rod is inserted through the top of the mounting platform and fixedly connected to it. A lifting rod is fixedly connected to the telescopic end of the electric push rod. A screw threadedly connected to the top of the lifting rod is inserted through it. A pressure plate is fixedly connected to the top of the screw. The bottom of the pressure plate contacts the top positioning platform. All three positioning platforms are fitted onto the lifting rod and slidably connected to it. Three clamping rings are arranged above the mounting platform, forming an umbrella shape. Threaded rings are fixedly connected to the top of the bottom two clamping rings, and threaded grooves for threaded connection to the threaded rings are opened at the bottom of the top two clamping rings. A lifting mechanism for driving the clamping rings to rise and fall is provided on the top of the mounting platform.

[0007] As a further description of the above technical solution:

[0008] The lifting mechanism includes a lifting ring, the top of which is fixedly connected to a clamping ring at the bottom. Two mounting boxes are fixedly connected to the top of the mounting platform. Electric push rods are fixedly connected to the inner walls of the two mounting boxes. The fixed ends of the two electric push rods pass through the two mounting boxes and are inserted into the mounting platform. The telescopic ends of the two electric push rods are fixedly connected to sliders. The outer sides of the two sliders are slidably connected to the two mounting boxes. The opposite sides of the two sliders are fixedly connected to the lifting ring.

[0009] As a further description of the above technical solution:

[0010] The top of each of the two bottom positioning platforms is fixedly connected with a ring-shaped limiting rod, and the bottom of each of the two top positioning platforms is provided with a ring-shaped positioning hole, the inner wall of which is slidably connected to the limiting rod.

[0011] As a further description of the above technical solution:

[0012] Three positioning plates are fixedly connected to the outer sides of the three clamping rings, and the positioning plates are square in shape.

[0013] As a further description of the above technical solution:

[0014] The outer surfaces of the three positioning platforms and the inner sides of the three pressure plates are all coated with a hard alloy coating.

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] This solution uses a conical positioning pin composed of three positioning platforms to adapt to sealing rings with different inner diameters. After the sealing ring is fitted onto the positioning pin, it will continue to be positioned until it can no longer descend, thus completing the positioning of the inner diameter of the sealing ring. The umbrella-shaped clamping plate composed of three clamping rings controls the raising and lowering of the clamping plate until the inner side of the clamping plate contacts the outer side of the sealing ring, thus completing the final positioning of the sealing ring. At this point, the outer surface of the sealing ring can be positioned using a surface contact method, replacing the point contact method of traditional jaw clamping, thereby effectively avoiding deformation of the sealing ring during positioning. Attached Figure Description

[0017] Figure 1 One of the perspective views of this utility model;

[0018] Figure 2 This is a second perspective view of the present utility model;

[0019] Figure 3 This is a cross-sectional view of the present invention.

[0020] Explanation of the labels in the diagram:

[0021] 1. Mounting platform; 2. Positioning platform; 3. Electric push rod one; 4. Lifting rod; 5. Pressure plate; 6. Clamping ring; 7. Threaded ring; 8. Threaded groove; 9. Lifting mechanism; 901. Lifting ring; 902. Mounting box; 903. Electric push rod two; 904. Slider; 10. Limiting rod; 11. Positioning hole; 12. Positioning plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;

[0023] Please see Figure 1-3 In this utility model, the positioning and centering mechanism of the sealing ring trimming machine includes a mounting platform 1. Three positioning platforms 2 are arranged on the top of the mounting platform 1, forming a conical shape. The bottom of the lowest positioning platform 2 is fixedly connected to the mounting platform 1. An electric push rod 3 is inserted through the top of the mounting platform 1 and fixedly connected thereto. A lifting rod 4 is fixedly connected to the telescopic end of the electric push rod 3. A pressure plate 5 is fixedly connected to the top of the lifting rod 4. The three positioning platforms 2 are all fitted onto the lifting rod 4 and slidably connected thereto. Three clamping rings 6 are arranged above the mounting platform 1, forming an umbrella shape. Threaded rings 7 are fixedly connected to the top of the bottom two clamping rings 6, and the bottom of the top two clamping rings 6 are each open. The mounting platform 1 has a threaded groove 8 that is threaded to the threaded ring 7. The top of the mounting platform 1 is provided with a lifting mechanism 9 that drives the clamping ring 6 to rise and fall. The lifting mechanism 9 includes a lifting ring 901. The top of the lifting ring 901 is fixedly connected to the bottom clamping ring 6. The top of the mounting platform 1 is fixedly connected to two mounting boxes 902. The inner walls of the two mounting boxes 902 are fixedly connected to electric push rods 903. The fixed ends of the two electric push rods 903 pass through the two mounting boxes 902 and are inserted into the mounting platform 1. The telescopic ends of the two electric push rods 903 are fixedly connected to sliders 904. The outer sides of the two sliders 904 are slidably connected to the two mounting boxes 902. The opposite sides of the two sliders 904 are fixedly connected to the lifting ring 901.

[0024] In this invention, when trimming the sealing ring of a tunnel boring machine, the mounting platform 1 is first installed in the appropriate position on the trimming machine. Then, the sealing ring is fitted onto the conical positioning pin formed by three positioning platforms 2 until the sealing ring is horizontally positioned and its inner diameter is fully in contact with the positioning pin. At this point, the initial positioning of the sealing ring is completed. Next, the worker simultaneously activates two electric push rods 903. The electric push rods 903 drive two sliders 904 to descend along the corresponding mounting box 902. Then, the sliders 904 drive the lifting ring 901 to descend. After the lifting ring 901 descends, it drives the umbrella-shaped clamping plate formed by three clamping rings 6 to descend. The clamping plate is located on the outside of the sealing ring. As the clamping plate descends, it contacts the outside of the sealing ring. The sealing ring is then clamped between the clamping plate and the positioning pin, thereby achieving the final positioning of the sealing ring. Then, the trimming machine can be started to trim the sealing ring.

[0025] After the inner diameter of the sealing ring is positioned, the sealing ring will contact one of the positioning platforms 2. The user will rotate the pressure plate 5 to drive the screw to rotate down from the lifting rod 4. At this time, the pressure plate 5 will disengage from the top positioning platform 2. Then, the worker will remove the positioning platform 2 located above the sealing ring and not in contact with the sealing ring, and then put the screw back. The electric push rod 3 will be turned on to drive the pressure plate 5 to descend. After the pressure plate 5 contacts the top of the positioning platform 2, the positioning platform 2 can be locked. At this time, the height of the positioning pin can be reduced, which makes it easier for the trimming machine to operate.

[0026] After clamping the sealing ring and achieving final positioning, the user rotates the clamping ring 6, which is located above the sealing ring but not in contact with it. The clamping ring 6 above the sealing ring will drive the threaded ring 7 to rotate in the threaded groove 8, and the clamping ring 6 can be removed. At this time, the height of the clamping plate can be reduced, which further facilitates the operation of the beveling machine on the sealing ring.

[0027] Please see Figure 3 The bottom two positioning platforms 2 are fixedly connected to the top of the ring-shaped limiting rods 10, and the bottom of the top two positioning platforms 2 are provided with ring-shaped positioning holes 11. The inner wall of the positioning hole 11 is slidably connected to the limiting rod 10.

[0028] In this invention, the matching arrangement of the limiting rod 10 and the positioning hole 11 can limit the positioning between the positioning platforms 2, effectively improving the stability of the positioning of the inner diameter of the sealing ring.

[0029] Please see Figure 1-3 Among them, three positioning plates 12 are fixedly connected to the outer sides of the three clamping rings 6, and the positioning plates 12 are square in shape.

[0030] In this utility model, the positioning plate 12 can facilitate the user to rotate the clamping ring 6 for disassembly, while also enabling the positioning plate 12 to be fully locked. When the clamping ring 6 is rotated so that the threaded ring 7 rotates in the threaded groove 8, the adjacent positioning plates 12 will be aligned in the fully locked state. By aligning the two adjacent positioning plates 12, it can be determined whether the position of the clamping ring 6 is fully locked.

[0031] Please see Figure 3 Among them, the outer surfaces of the three positioning platforms 2 and the inner sides of the three pressure plates 5 are all coated with hard alloy coating.

[0032] In this invention, by spraying a hard alloy coating onto the outer surfaces of the three positioning platforms 2 and the inner sides of the three pressure plates 5, the wear of the sealing ring on the structure can be effectively reduced, thereby increasing the service life. It can also avoid positioning deviations caused by wear, thereby improving the practicality of the device.

[0033] The above are merely preferred embodiments of this utility model; however, the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and its improved concept, should be included within the scope of protection of this utility model.

Claims

1. A positioning and centering mechanism for a sealing ring trimming machine, comprising a mounting table (1), characterized in that: The top of the mounting platform (1) is provided with three positioning platforms (2), which are arranged in a conical shape. The bottom of the bottom positioning platform (2) is fixedly connected to the mounting platform (1). An electric push rod (3) is inserted through the top of the mounting platform (1) and fixedly connected thereto. A lifting rod (4) is fixedly connected to the telescopic end of the electric push rod (3). A screw rod is threaded through the top of the lifting rod (4) and fixedly connected to it. A pressure plate (5) is fixedly connected to the top of the screw rod. The bottom of the pressure plate (5) is connected to the top of the mounting platform (1). The positioning platform (2) is in contact with the three positioning platforms (2), and all three positioning platforms (2) are sleeved on the lifting rod (4) and slidably connected to it. Three clamping rings (6) are provided above the mounting platform (1). The three clamping rings (6) are arranged in an umbrella shape. The top of the bottom two clamping rings (6) are fixedly connected with threaded rings (7). The bottom of the top two clamping rings (6) are provided with threaded grooves (8) that are threadedly connected to the threaded rings (7). The top of the mounting platform (1) is provided with a lifting mechanism (9) that drives the clamping rings (6) to rise and fall.

2. The centering mechanism of a sealing ring trimmer according to claim 1, wherein: The lifting mechanism (9) includes a lifting ring (901), the top of which is fixedly connected to the bottom clamping ring (6). The top of the mounting platform (1) is fixedly connected to two mounting boxes (902). The inner walls of the two mounting boxes (902) are fixedly connected to electric push rods (903). The fixed ends of the two electric push rods (903) pass through the two mounting boxes (902) and are inserted into the mounting platform (1). The telescopic ends of the two electric push rods (903) are fixedly connected to sliders (904). The outer sides of the two sliders (904) are slidably connected to the two mounting boxes (902). The opposite sides of the two sliders (904) are fixedly connected to the lifting ring (901).

3. The centering mechanism of a sealing bead trimmer as claimed in claim 1, characterized in that: The top of the two bottom positioning platforms (2) is fixedly connected with a ring-shaped limiting rod (10), and the bottom of the two top positioning platforms (2) is provided with a ring-shaped positioning hole (11). The inner wall of the positioning hole (11) is slidably connected to the limiting rod (10).

4. The positioning and centering mechanism of the sealing ring trimming machine according to claim 1, characterized in that: Three positioning plates (12) are fixedly connected to the outer sides of the three clamping rings (6), and the positioning plates (12) are square in shape.

5. The positioning and centering mechanism of the sealing ring trimming machine according to claim 1, characterized in that: The outer surfaces of the three positioning platforms (2) and the inner sides of the three pressure plates (5) are all coated with a hard alloy coating.

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