High-precision hole machining device for mounting surface of central transmission device of shield tunneling machine

Abstract

A high-precision hole machining device for a mounting surface of a central transmission device of a shield tunneling machine comprises a tool plate, a guiding and positioning device, a cutter and a bearing, the guiding and positioning device is fixedly connected to the tool plate, a through mounting hole is formed in the tool plate, a through positioning hole is formed in the guiding and positioning device, and the mounting hole of the tool plate is communicated with the positioning hole of the guiding and positioning device; the bearing is sleeved on the cutter, and the cutter and the bearing are arranged in a positioning hole of the guiding and positioning device together. Not only can the position of a machined hole be accurately positioned, but also high-precision hole machining can be carried out under the guidance of the guiding and positioning device. The reference sleeve is installed in the tool plate, the guide positioning sleeve is installed in the guide positioning device, abrasion of the tool plate and the guide positioning device can be avoided, and the reference sleeve and the guide positioning sleeve are convenient to replace.

Description

Technical Field

[0001] The utility model relates to a high-precision hole processing device, in particular to a high-precision hole processing device for the mounting surface of a central transmission device of a shield machine. Background Art

[0002] The mounting surface of the shield machine's central drive unit has a large diameter, requiring numerous holes for mounting components, some of which require high precision. Hole drilling for the central drive unit's mounting surface is typically performed with the surface held horizontally. Traditional methods of marking with a benchworker and drilling along the lines with a radial drill fail to meet design and technical requirements in terms of precision. Using large CNC machine tools for hole drilling also hinders the ability to reach the desired hole location due to the large distance between the hole and the end face, making the process impossible. Utility Model Content

[0003] The technical problem to be solved by the utility model is: how to process high-precision holes on the mounting surface of the central transmission device of a shield machine.

[0004] In response to the above problems, the technical solution proposed in the utility model is: a high-precision hole processing device for the mounting surface of the central transmission device of a shield machine, including a tooling plate, a guide and positioning device, a tool and a bearing, the guide and positioning device is fixedly connected to the tooling plate, the tooling plate is provided with a through mounting hole, the guide and positioning device is provided with a through positioning hole, and the mounting hole of the tooling plate is connected to the positioning hole of the guide and positioning device; the bearing is sleeved on the tool, and the tool and the bearing are arranged together in the positioning hole of the guide and positioning device.

[0005] Preferably, the guide and positioning device includes a guide cylinder, a chip removal hole and a positioning seat. The lower end of the guide cylinder is provided with a chip removal hole that passes through in a radial direction, and the bottom of the guide cylinder is fixedly connected to the positioning seat.

[0006] Preferably, a reference sleeve is provided in the mounting hole of the tooling plate. The reference sleeve is a rotating body provided on the upper end of the tooling plate, and the reference sleeve is connected to the tooling plate by interference fit.

[0007] Preferably, the cross-section of the positioning seat of the guide positioning device is a transverse L-shape, the positioning seat is fixedly connected to the tooling plate by bolts, the upper end of the reference sleeve is socketed with the lower end of the positioning seat, and the lower end of the positioning seat presses the reference sleeve onto the tooling plate.

[0008] Preferably, it further comprises a guide positioning sleeve, which is arranged on the inner side of the upper end of the guide cylinder, and the guide positioning sleeve is connected to the guide cylinder by interference fit.

[0009] Preferably, the tool includes a tool rod, a bearing and a tool head. The tool rod is a rotating body, the bearing is sleeved on the tool rod, and the lower end of the tool rod is connected to the tool head.

[0010] Preferably, the cutter further comprises a limiting sheet, the limiting sheet is provided with a through inner threaded hole, the cutter rod is provided with an outer thread, and the limiting sheet is connected to the cutter rod through the threads.

[0011] Preferably, the lower end of the cutter rod and the upper end of the cutter head are provided with a radial mounting hole, and a fastening bolt is used to fix and connect the cutter head to the lower end of the cutter rod.

[0012] The beneficial technical effects of the utility model are as follows: the position of the hole processed on the mounting surface is accurately positioned through the tool plate, the guiding positioning device is arranged on the tool plate, the cutter is arranged in the guiding positioning device, and the mounting surface of the transmission device is processed with high precision. The position of the processed hole can be accurately positioned and processed with high precision under the guidance of the guiding positioning device. The reference sleeve is arranged in the tool plate, the guiding positioning sleeve is arranged in the guiding positioning device, the wear of the tool plate and the guiding positioning device can be avoided, and the reference sleeve and the guiding positioning sleeve are convenient to replace. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic view of the overall structure of the embodiment one;

[0014] Figure 2 It is a schematic view of the structure of the embodiment one without the cutter;

[0015] Figure 3 It is a schematic view of the structure of the cutter in the embodiment one;

[0016] In the drawing: mounting surface plate 11, reference hole 12, tool plate 2, reference sleeve 3, guiding positioning sleeve 4, guiding cylinder 51, chip removal hole 52, positioning seat 53, cutter rod 61, limiting sheet 62, guiding conical surface 621, bearing 63, fastening bolt 64, cutter head 65. DETAILED DESCRIPTION

[0017] The utility model will be further described in combination with the embodiment and the drawing: Embodiment one

[0018] As shown in Figure 1 and Figure 2 The high-precision hole processing device comprises a tool plate 2, a guiding positioning device, a reference sleeve 3, a guiding positioning sleeve 4, a cutter and a bearing 63. The mounting surface plate 11 of the center transmission device of the shield machine is processed, the position and size of the hole are accurately marked on the surface of the mounting surface plate 11 first, then the tool plate 2 is moved to the position of the marked hole. The tool plate 2 is provided with a through mounting hole, the position of the tool plate 2 is adjusted, the mounting hole of the tool plate 2 made of metal is aligned with the center of the marked hole, and then the guiding positioning device is arranged on the tool plate 2.

[0019] The guide and positioning device includes a guide cylinder 51, a chip removal hole 52, and a positioning seat 53. To prevent wear and tear caused by repeated assembly of the positioning seat 53 and the tooling plate 2, which would affect positioning accuracy, a reference sleeve 3 is installed between the positioning seat 53 and the tooling plate 2. The surface roughness of the reference sleeve 3 is higher than that of both the positioning seat 53 and the tooling plate 2. The reference sleeve 3 is positioned above the mounting hole of the tooling plate 2 and is installed in the mounting hole of the tooling plate 2 with an interference fit, which effectively prevents the reference sleeve 3 from loosening.

[0020] The lower end of the guide cylinder 51 is provided with a radially extending chip removal hole 52. The bottom of the guide cylinder 51 is fixedly connected to the positioning seat 53. The positioning seat 53 and the reference sleeve 3 are both rotating bodies. The guide cylinder 51 and the positioning seat 53 each have a circular positioning hole extending through the center. The mounting hole of the tooling plate 2 communicates with the positioning hole of the guide positioning device. The chip removal hole 52 provided at the lower end of the guide cylinder 51 is designed to allow metal debris generated by the tool drilling the mounting panel 11 to be discharged outward through the mounting hole of the tooling plate 2, the positioning hole of the guide positioning device, and the chip removal hole 52, preventing metal debris from accumulating and clogging the mounting hole and positioning hole. The cross-section on the right side of the positioning seat 53 is an L-shape rotated 90 degrees clockwise. The positioning seat 53 is fixed to the tooling plate 2 by bolts (the positioning seat 53 and the vertical mounting holes on the tooling plate 2 are not drawn in the figure). The lower end of the positioning seat 53 is sleeved on the upper end of the reference sleeve 3, and the lower end of the positioning seat 53 presses the reference sleeve 3 onto the tooling plate 2.

[0021] like Figures 1 to 3 As shown, the tool comprises a shank 61, a bearing 63, and a cutter head 65. The shank 61 is a rotating body, and the bearing 63 is mounted on the shank 61. The cutter head 65 is connected to the lower end of the shank 61. To prevent the bearing 63 from moving on the shank 61, stoppers 62 are installed above and below the bearing 63, contacting the bearing 63. The shank 61 is provided with external threads, and the stoppers 62 have internal threaded holes extending therethrough. The stoppers 62 are threadedly connected to the shank 61. Tightening the stoppers 62 causes both stoppers 62 to contact the bearing 63, thereby limiting the bearing 63.

[0022] A guide locating sleeve 4 is installed on the inner side of the upper end of the guide cylinder 51, and the guide locating sleeve 4 is connected to the guide cylinder 51 by interference fit. After the tool and the bearing 63 are assembled into the guide locating sleeve 4 together, the guide locating sleeve 4 guides and positions the tool by the bearing 63, thereby guiding and positioning the tool to ensure the accuracy of hole processing. In order to facilitate the assembly of the tool and the bearing 63 into the guide locating sleeve 4 together, a guide cone 621 is provided on the outside of the limiting piece 62. Among them, the guide cone 621 of the limiting piece 62 below the bearing 63 is a cone with a small outer diameter at the lower end and a large outer diameter at the upper end, and the guide cone 621 of the limiting piece 62 above the bearing 63 is a cone with a small outer diameter at the lower end and a small outer diameter at the upper end. The function of the guide locating sleeve 4 is consistent with that of the reference sleeve 3, which is to avoid the tool and the bearing 63 from being assembled into the guide cylinder 51 multiple times, causing wear and affecting the accuracy of hole processing.

[0023] When the cutter head 65 drills a hole in the transmission device's mounting panel 11, it inevitably wears out. To facilitate replacement of the cutter head 65, in this embodiment, radial mounting holes are provided at both the lower end of the cutter bar 61 and the upper end of the cutter head 65. Fastening bolts 64 pass through these mounting holes to securely connect the cutter head 65 to the lower end of the cutter bar 61. After removing the fastening bolts 64, the old cutter head 65 can be removed and replaced with a new one, enabling better and more efficient hole drilling.

[0024] Obviously, without departing from the principles of the present invention, any improvements or modifications made should be considered within the scope of protection of the present invention.

Claims

1. High-precision hole processing device for the installation surface of the central transmission device of the shield machine, characterized in that: It includes a tooling plate, a guide and positioning device, a tool and a bearing. The guide and positioning device is fixedly connected to the tooling plate. The tooling plate has a through mounting hole. The guide and positioning device is provided with a through positioning hole. The mounting hole of the tooling plate is connected to the positioning hole of the guide and positioning device. The bearing is sleeved on the tool, and the tool and the bearing are arranged together in the positioning hole of the guide and positioning device.

2. The high-precision hole machining device for the mounting surface of the central transmission device of a shield machine according to claim 1, characterized in that: The guide and positioning device comprises a guide cylinder, a chip removal hole and a positioning seat. The lower end of the guide cylinder is provided with a chip removal hole which penetrates in a radial direction, and the bottom of the guide cylinder is fixedly connected with the positioning seat.

3. The high-precision hole machining device for the mounting surface of the central transmission device of a shield machine according to claim 2, characterized in that: A reference sleeve is provided in the mounting hole of the tooling plate. The reference sleeve is a rotating body provided on the upper end of the tooling plate, and the reference sleeve is connected to the tooling plate with an interference fit.

4. The high-precision hole machining device for the mounting surface of the central transmission device of a shield machine according to claim 3, characterized in that: The cross section of the positioning seat of the guide positioning device is a transverse L-shape. The positioning seat is fixedly connected to the tooling plate by bolts. The upper end of the reference sleeve is sleeved with the lower end of the positioning seat, and the lower end of the positioning seat presses the reference sleeve onto the tooling plate.

5. The high-precision hole machining device for the mounting surface of the central transmission device of a shield machine according to claim 4, characterized in that: It also includes a guide positioning sleeve, which is arranged on the inner side of the upper end of the guide cylinder, and the guide positioning sleeve is connected to the guide cylinder through interference fit.

6. The high-precision hole machining device for the mounting surface of the central transmission device of a shield machine according to claim 5, characterized in that: The tool comprises a tool rod, a bearing and a tool head. The tool rod is a rotating body, the bearing is sleeved on the tool rod, and the lower end of the tool rod is connected to the tool head.

7. The high-precision hole machining device for the mounting surface of the central transmission device of a shield machine according to claim 6, characterized in that: The tool also includes a limit plate, which has a through internal threaded hole. The tool rod is provided with an external thread. The limit plate is connected to the tool rod through a thread, and limit plates are provided above and below the bearing.

8. The high-precision hole machining device for the mounting surface of the central transmission device of a shield machine according to claim 7, characterized in that: The lower end of the cutter rod and the upper end of the cutter head are both provided with radial mounting holes, and the fastening bolts pass through the mounting holes to fix the cutter head to the lower end of the cutter rod.

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