Detachable double-end conical bolt center hole alignment device

Abstract

The utility model discloses a detachable double-end conical bolt center hole alignment device which comprises a base ejector rod (1), a steering wheel (2) and a chuck (3), and is characterized in that the rod part of the base ejector rod (1) is clamped at a machine tool spindle, the other end of the base ejector rod (1) penetrates through a center preformed hole of the steering wheel (2), a sliding groove (6) is formed in the base ejector rod (1), and the chuck (3) is arranged in the sliding groove (6). The large cylindrical section of the steering wheel (2) is embedded into a circular groove reserved in the center of the chuck (3), the other end of the steering wheel (2) is provided with a positioning block (4), the positioning block (4) is arranged in the sliding groove (6) in a sliding mode, the base ejector rod (1), the steering wheel (2) and the chuck (3) can rotate in the axial direction, and the base ejector rod (1), the steering wheel (2) and the chuck (3) are provided with an opening A (5), an opening B (7) and an opening C (8) respectively. The centering device is simple in structure, efficient, labor-saving and suitable for being popularized and used for centering the center hole of the double-end conical bolt.

Description

Technical Field

[0001] The utility model belongs to the technical field of alignment devices, in particular to a detachable double-headed conical bolt center hole alignment device. Background Art

[0002] A double-ended conical bolt is a bolt with threads on both ends and a screw in the middle. Its structure is as follows: Figure 9-10 As shown. It is commonly used in mining machinery, bridges, automobiles, cranes, large-span steel structures and large buildings. Because the polished rods on both sides of the stud bolt have high requirements for the verticality of the middle head, when processing the supporting surfaces at both ends of the head, it is necessary to first make the top holes of the polished rod to ensure that the coaxiality of the two tops is within 0.015, and then turn the two end faces based on the two top holes, and then align them with the machine tool top before turning.

[0003] During on-site processing, it is necessary to use a dial indicator for leveling, first make a top hole for the longer end of the polished rod, then change the clamping direction, use a fixed tool to hold the top hole, and then make the top hole for the polished rod at the other end, then remove the product and the tooling, manually adjust the product so that the machine tool top can hold the top holes at both ends of the bolt, and then turn the two end faces of the head after the product is fixed. This alignment process not only requires multiple disassembly and clamping of the product, which consumes a lot of operator time and energy, but also relies heavily on human control and has a poor fault tolerance. The product often deviates during the manual adjustment of the top holes at both ends of the top bolt of the product, resulting in scrapping and economic losses. It can no longer meet the alignment requirements of the center hole of the double-headed tapered bolt. Utility Model Content

[0004] The utility model aims to overcome the above disadvantages and provide a detachable double-headed conical bolt center hole alignment device which has simple structure, high efficiency, labor saving and convenient operation.

[0005] The purpose of the utility model and the solution of its main technical problems are achieved by adopting the following technical solutions:

[0006] The utility model discloses a detachable double-headed conical bolt center hole alignment device, comprising a base push rod, a steering wheel and a chuck, wherein: the longer rod portion of the base push rod is clamped at the main shaft of the machine tool, the other end of the base push rod passes through the central reserved hole of the steering wheel, a slide groove is arranged on the base push rod, the larger cylindrical section of the steering wheel is embedded in the circular groove reserved in the center of the chuck, a positioning block is arranged on the other end of the steering wheel, the positioning block can be slidably placed in the slide groove, the base push rod, the steering wheel and the chuck can all rotate along the axial direction, and the base push rod, the steering wheel and the chuck are respectively provided with an opening A, an opening B and an opening C.

[0007] The above-mentioned detachable double-headed conical bolt center hole alignment device, wherein: the positioning block is an eccentrically arranged cylindrical block.

[0008] The above-mentioned detachable double-headed conical bolt center hole alignment device, wherein: the slide groove is a circular ring groove body, and the opening A is connected to the slide groove.

[0009] The above-mentioned detachable double-headed conical bolt center hole alignment device, wherein: the opening B is U-shaped.

[0010] The above-mentioned detachable double-headed conical bolt center hole alignment device, wherein: the opening C is U-shaped.

[0011] Compared with the prior art, the utility model has obvious advantages and beneficial effects. It can be seen from the above technical scheme that in the detachable double-headed conical bolt center hole alignment device of the utility model, the longer rod of the base top rod is clamped at the main shaft of the machine tool, the other end of the base top rod passes through the central reserved hole of the steering wheel, a slide groove is provided on the base top rod, and a positioning block is provided on the other end of the steering wheel. The positioning block can be slidably placed in the slide groove, the slide groove is a circular groove body, and the opening A is connected to the slide groove. When the positioning block is in the slide groove, the base top rod and the steering wheel are locked. If the positioning block is rotated to the opening A, the base top rod and the steering wheel can be disassembled. The steering wheel and the chuck can both rotate axially, and the steering wheel and the chuck are respectively provided with openings B and C. When the openings B and C are misaligned, the steering wheel and the chuck are in a locked state, and when the openings B and C are aligned, the steering wheel and the chuck are in a detachable state. The device limits the movement of the product through the base top rod and the chuck, has better stability, and is more convenient to align the top hole. At the same time, the steering wheel is designed between the base top rod and the chuck, and the device can be adjusted to two modes, namely, the locking state and the disassembly state, by rotating the steering wheel. The utility model has a simple structure, high efficiency and labor saving, and is easy to operate, and is suitable for the promotion and use of the center hole alignment of the double-headed conical bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the top rod of the base;

[0014] Figure 3 for Figure 2 Left view of;

[0015] Figure 4 for Figure 2 Section view along line AA;

[0016] Figure 5 is a structural schematic diagram of a steering wheel;

[0017] Figure 6 for Figure 5 Sectional view along line BB;

[0018] Figure 7 is a structural schematic diagram of a chuck;

[0019] Figure 8 for Figure 7 Sectional view along line CC;

[0020] Fig. 9 It is a schematic diagram of the structure of a double-headed conical bolt;

[0021] Fig.10 for Fig. 9 Left view of;

[0022] Fig.11 This is a diagram of the device in use when it is locked;

[0023] Fig.12 This is a diagram of the device in disassembled state.

[0024] Markings in the figure:

[0025] 1. Base push rod; 2. Steering wheel; 3. Chuck; 4. Positioning block; 5. Opening A; 6. Slide groove; 7. Opening B; 8. Opening C; 9. Stud-headed conical bolt. DETAILED DESCRIPTION

[0026] The following is a detailed description of the specific implementation method, structure, features and effects of the detachable double-headed tapered bolt center hole alignment device proposed in accordance with the present invention in conjunction with the accompanying drawings and preferred embodiments.

[0027] See also Figures 1 to 8 The utility model discloses a detachable double-headed conical bolt center hole alignment device, comprising a base push rod 1, a steering wheel 2, and a chuck 3, characterized in that: the longer rod portion of the base push rod 1 is clamped at the spindle of the machine tool, the other end of the base push rod 1 passes through the central reserved hole of the steering wheel 2, a slide groove 6 is provided on the base push rod 1, the larger cylindrical section of the steering wheel 2 is embedded in the circular groove reserved in the center of the chuck 3, a positioning block 4 is provided on the other end of the steering wheel 2, the positioning block 4 can be slidably placed in the slide groove 6, the base push rod 1, the steering wheel 2 and the chuck 3 can all rotate along the axial direction, and the base push rod 1, the steering wheel 2 and the chuck 3 are respectively provided with an opening A5, an opening B7 and an opening C8. The positioning block 4 is an eccentrically arranged cylindrical block. The slide groove 6 is a circular annular groove body, and the opening A5 is connected to the slide groove 6. The opening B7 is U-shaped. The opening C8 is U-shaped.

[0028] When using, see Fig.11, clamp the longer rod part of the base push rod 1 on the main shaft of the machine tool, and the other end of the base push rod 1 passes through the central reserved hole of the steering wheel 2. The larger cylindrical section of the steering wheel 2 is embedded in the circular groove reserved in the center of the chuck 3. By rotating, the positioning block 4 is placed in the slide groove 6 instead of the opening A5, and the opening B7 of the steering wheel 2 is misaligned with the opening C8 of the chuck 3, that is, it is in a locked state. At this time, the top hole of the shorter end of the polished rod of the double-headed conical bolt 9 can be placed in the circular hole reserved in the center of the chuck 3. After the bolt head is clamped with the chuck 3, the top hole at the other end is supported by the machine tool top to complete the top hole alignment.

[0029] When disassembly is necessary, see Fig.12 , rotate the chuck 3 to align the opening B7 of the steering wheel 2 with the opening C8 of the chuck 3, and at the same time rotate the positioning block 4 to place it at the opening A5. At this time, the chuck 3 and the steering wheel 2 can be pulled out along the right-angled side of the head of the stud-headed conical bolt 9. Since both ends of the product have been supported by the top, the product itself will not be affected. After the chuck 3 and the steering wheel 2 are removed, the turning of the two end faces of the head can continue.

[0030] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A detachable double-headed conical bolt center hole alignment device, comprising a base top rod (1), a steering wheel (2), and a chuck (3), characterized in that: The longer rod portion of the base push rod (1) is clamped at the main shaft of the machine tool, the other end of the base push rod (1) passes through the central reserved hole of the steering wheel (2), a slide groove (6) is provided on the base push rod (1), the larger cylindrical section of the steering wheel (2) is embedded in the circular groove reserved in the center of the chuck (3), a positioning block (4) is provided at the other end of the steering wheel (2), the positioning block (4) can be slidably placed in the slide groove (6), the base push rod (1), the steering wheel (2) and the chuck (3) can all rotate along the axial direction, and the base push rod (1), the steering wheel (2) and the chuck (3) are respectively provided with an opening A (5), an opening B (7) and an opening C (8).

2. The detachable stud-shaped conical bolt center hole alignment device according to claim 1, characterized in that: The positioning block (4) is an eccentrically arranged cylindrical block.

3. The detachable double-headed conical bolt center hole alignment device according to claim 1, characterized in that: The slide groove (6) is a circular groove body, and the opening A (5) is connected to the slide groove (6).

4. The detachable double-headed conical bolt center hole alignment device according to claim 1, characterized in that: The opening B (7) is U-shaped.

5. The detachable stud-shaped conical bolt center hole alignment device according to claim 1, characterized in that: The opening C (8) is U-shaped.

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