Round hole circle center positioning tool

Abstract

The utility model relates to the field of diesel generating set production and processing, in particular to a round hole circle center positioning tool which comprises a positioning column provided with more than two positioning channels, the positioning channels are evenly distributed in the circumferential direction of the positioning column, and the positioning channels comprise an axial channel parallel to the axis of the positioning column and a radial channel arranged in the radial direction of the positioning column; the movable block is movably arranged on the positioning column in the axial direction of the positioning column; one end of the elastic positioning piece is connected with the movable block, and the other end sequentially penetrates through the axial channel and the radial channel and then extends out. According to the positioning tool for the circle center of the round hole, under the condition that the installation hole positions between the assembly parts have deviation, the circle center of the hole position needing to be added on the assembled part can be quickly positioned through the tool according to the hole positions of the assembly parts, and it is guaranteed that the installation hole positions between the assembly parts which are drilled through the circle center can be aligned; and the subsequent assembly work is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of production and processing of diesel generator sets, in particular to a positioning tool for the center of a round hole. Background Art

[0002] As a power equipment, a diesel generator set is assembled and produced from a large number of parts processed by machinery. Due to the large number of parts, the production of parts is generally provided by multiple suppliers, and the production processes of each supplier are different. There are problems with installation hole position deviations during the assembly of each part. For this type of problem, the current process is to first draw a line, then determine the center of the circle, and then perform matching drilling to ensure that the hole positions between the assembled parts can be aligned, and finally fix them with bolts and nuts. For the installation hole position deviation between two assembled parts, it is necessary to first perform assembly, use the original hole position of one assembled part to locate the hole position of the other assembled part, then disassemble the two assembled parts, draw a line on the located assembled part, confirm the center of the circle where the hole needs to be added, perform matching drilling to increase the installation holes of the assembled part in the assembly plant, and then perform assembly. The entire production process is repetitive and cumbersome. Because it is necessary to draw a line to determine the center of the circle where the hole needs to be added, it is easy to make a drawing size error, resulting in the problem that the added hole still has an installation deviation. Therefore, some tools that can improve the positioning accuracy of the center of a round hole have been proposed by industry players. For example, a Chinese utility model patent with the application number CN202120180227.4 and the name of a positioning device for the center of a round hole. The existing positioning device for the center of a round hole is designed relatively complicated, the operation is inconvenient, and the measurement process often takes a lot of time, which is not conducive to improving production efficiency. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an efficient and convenient positioning tool for the center of a round hole.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a positioning tool for the center of a round hole, comprising:

[0005] A positioning column is provided with a positioning channel, and more than two positioning channels are evenly distributed along the circumferential direction of the positioning column. The positioning channel includes an axial channel parallel to the axis of the positioning column and a radial channel arranged along the radial direction of the positioning column;

[0006] A movable block is movably arranged on the positioning column along the axial direction of the positioning column;

[0007] An elastic positioning member, one end of which is connected to the movable block, and the other end passes through the axial channel and the radial channel in sequence and then extends out.

[0008] Further, the surface of the positioning column is provided with threads, and the movable block is in threaded cooperation with the positioning column.

[0009] Further, the positioning post includes a lead screw and a guiding block which are coaxially assembled. Both the movable block and the guiding block are in threaded engagement with the lead screw. The lead screw is provided with an axial channel along its generatrix, and the guiding block is provided with a radial channel along its radius.

[0010] Further, the guiding block includes a positioning nut and a guiding nut which are spliced with each other. Both the positioning nut and the guiding nut are in threaded engagement with the lead screw. After the positioning nut and the guiding nut are spliced, a radial channel is formed.

[0011] Further, the splicing surfaces of the positioning nut and the guiding nut are both arc surfaces. Guide grooves are provided on the arc surfaces. The guide grooves of the positioning nut and the guide grooves of the guiding nut are spliced to form a radial channel.

[0012] Further, the lead screw includes a first threaded portion and a second threaded portion. The positioning nut is in threaded connection with the first threaded portion, and both the movable block and the guiding nut are in threaded connection with the second threaded portion.

[0013] Further, the movable block is provided with an annular clamping groove, and one end of the elastic positioning member is provided with a buckle which is slidably matched with the annular clamping groove.

[0014] Further, the elastic positioning member is a strip-shaped elastic sheet.

[0015] Further, a positioning cone is further included. The positioning post is provided with a positioning hole along its axis, and the positioning cone is slidably connected with the positioning hole.

[0016] Further, the end of the positioning cone is provided with a conical head.

[0017] The beneficial effects of the present utility model are as follows: A circular hole center positioning tool includes a positioning post, a movable block and an elastic positioning member. By moving the movable block on the positioning post, multiple elastic positioning members can be controlled to simultaneously pass through the axial channel and the radial channel and then extend and retract. When the multiple elastic positioning members extend and simultaneously abut against the hole wall of the fitting, the axis of the positioning post is the center position of the circular hole. The fitting to be assembled can thus determine the center. When in use, it can be used after the two fittings are assembled, without the need for repeated disassembly and assembly. The center of the hole position that needs to be added to the fitting to be assembled can be quickly and accurately marked out, without the need for traditional processes such as drawing lines and positioning which may have errors. The entire tool has a compact structure and is convenient to operate. When there are deviations in the installation hole positions between the fittings, the circular hole center positioning tool provided by the present utility model can quickly locate the center of the hole position that needs to be added to the fitting to be assembled according to the hole positions of the fittings, and ensure that the installation hole positions between the fittings after drilling through the center are aligned, facilitating subsequent assembly work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the circular hole center positioning tool;

[0019] Figure 2The front view of the centering tool for the center of a circular hole;

[0020] Figure 3 The top view of the centering tool for the center of a circular hole;

[0021] Figure 4 The sectional view of the centering tool for the center of a circular hole;

[0022] Figure 5 Another structural schematic diagram of the centering tool for the center of a circular hole;

[0023] Label description:

[0024] 1. Positioning post; 11. Positioning channel; 111. Axial channel; 112. Radial channel; 12. Lead screw; 121. First thread part; 122. Second thread part; 13. Guide block; 131. Positioning nut; 1311. Arc surface; 1312. Guide groove; 132. Guide nut; 14. Positioning hole; 2. Movable block; 21. Annular clamping groove; 3. Elastic positioning member; 31. Buckle; 4. Positioning cone; 41. Cone head. Specific implementation mode

[0025] To illustrate the technical content, achieved purpose and effect of the present utility model in detail, the following is described in conjunction with the implementation modes and with reference to the drawings.

[0026] The present utility model provides a centering tool for the center of a circular hole, which is applicable to the centering operation of parts in the production and processing processes such as diesel generator sets.

[0027] Please refer to Figures 1 to 5 As shown, a centering tool for the center of a circular hole of the present utility model includes:

[0028] A positioning post 1, provided with a positioning channel 11, and two or more positioning channels 11 are evenly distributed along the circumference of the positioning post 1. The positioning channel 11 includes an axial channel 111 parallel to the axis of the positioning post 1 and a radial channel 112 arranged along the radial direction of the positioning post 1;

[0029] A movable block 2, movably arranged on the positioning post 1 along the axial direction of the positioning post 1;

[0030] An elastic positioning member 3, one end of which is connected to the movable block 2, and the other end passes through the axial channel 111 and the radial channel 112 in sequence and then extends out.

[0031] As can be seen from the above description, the beneficial effects of the present utility model are as follows: A circular hole center positioning tool includes a positioning column 1, a movable block 2, and an elastic positioning member 3. By moving the movable block 2 on the positioning column 1, multiple elastic positioning members 3 can be controlled to simultaneously extend and retract after passing through the axial channel 111 and the radial channel 112. When multiple elastic positioning members 3 extend and simultaneously abut against the hole wall of the fitting, the axis of the positioning column 1 is the center position of the circular hole. Based on this, the fitting to be assembled can determine the center of the circle. When in use, it can be used after the two fittings are assembled, without the need for repeated disassembly and assembly. It can quickly and accurately mark the center of the circular hole that needs to be added to the fitting to be assembled, without the need for traditional processes such as drawing lines and positioning that may have errors. The entire tool has a compact structure and is convenient to operate. When there is a deviation in the installation holes between the fittings, the circular hole center positioning tool provided by the present utility model can quickly position the center of the circular hole that needs to be added to the fitting to be assembled based on the hole positions of the fittings, and ensure that the installation holes between the fittings after drilling through this center can be aligned, facilitating subsequent assembly work.

[0032] In an alternative embodiment, the surface of the positioning column 1 is provided with threads, and the movable block 2 is in threaded engagement with the positioning column 1.

[0033] As can be seen from the above description, the threaded engagement between the movable block 2 and the positioning column 1 is more convenient to control the axial movement process of the movable block 2 relative to the positioning column 1, thereby precisely controlling the expansion and contraction of the elastic positioning member 3 and avoiding inaccurate positioning caused by the retraction of the elastic positioning member 3 after abutting against the hole wall.

[0034] In an alternative embodiment, the positioning column 1 includes a lead screw 12 and a guide block 13 assembled coaxially. Both the movable block 2 and the guide block 13 are in threaded engagement with the lead screw 12. The lead screw 12 is provided with an axial channel 111 along its generatrix, and the guide block 13 is provided with a radial channel 112 along the radial direction.

[0035] As can be seen from the above description, the guide block 13 guides and restricts the movement direction of the elastic positioning member 3. When the movable block 2 rotates in threaded engagement on the lead screw 12, it drives the elastic positioning member 3 to slide in the axial channel 111 and the radial channel 112.

[0036] In an alternative embodiment, the guide block 13 includes a positioning nut 131 and a guide nut 132 that are spliced together. Both the positioning nut 131 and the guide nut 132 are in threaded engagement with the lead screw 12, and the radial channel 112 is formed after the positioning nut 131 and the guide nut 132 are spliced.

[0037] As can be seen from the above description, both the positioning nut 131 and the guide nut 132 are in threaded engagement with the lead screw 12, and the disassembly, installation, and adjustment are convenient.

[0038] In an alternative embodiment, the splicing surfaces of the positioning nut 131 and the guiding nut 132 are both arc surfaces 1311, and guiding grooves 1312 are provided on the arc surfaces 1311. The guiding grooves 1312 of the positioning nut 131 and the guiding grooves 1312 of the guiding nut 132 are spliced to form a radial channel 112.

[0039] As can be seen from the above description, the movement path of the elastic positioning member 3 is defined by the guiding grooves 1312 on the arc surface 1311, ensuring the smoothness and accuracy of the movement of the elastic positioning member 3.

[0040] In an alternative embodiment, the lead screw 12 includes a first threaded portion 121 and a second threaded portion 122. The positioning nut 131 is threadedly connected to the first threaded portion 121, and both the movable block 2 and the guiding nut 132 are threadedly connected to the second threaded portion 122.

[0041] As can be seen from the above description, the lead screw 12 adopts a large and small diameter design. The positioning nut 131 and the guiding nut 132 are respectively screwed and fitted from the first threaded portion 121 and the second threaded portion 122, which is convenient for operation.

[0042] In an alternative embodiment, the movable block 2 is provided with an annular card slot 21, and one end of the elastic positioning member 3 is provided with a buckle 31 that slidably cooperates with the annular card slot 21.

[0043] As can be seen from the above description, when the movable block 2 rotates, the buckle 31 of the elastic positioning member 3 rotates circumferentially leftward relative to the annular card slot 21.

[0044] In an alternative embodiment, the elastic positioning member 3 is a strip-shaped elastic piece.

[0045] In an alternative embodiment, it further includes a positioning cone 4. The positioning column 1 is provided with a positioning hole 14 along the axial direction, and the positioning cone 4 is slidably connected to the positioning hole 14.

[0046] In an alternative embodiment, the end of the positioning cone 4 is provided with a conical cone head 41.

[0047] As can be seen from the above description, the positioning cone 4 is integrated for scribing the center of the required round hole. After the elastic positioning member 3 horizontally extends from multiple directions and abuts against the inner circle of the hole position of the fitting, by knocking the tail of the positioning cone 4, the cone head 41 of the positioning cone 4 can leave a pit on the other fitting to be assembled, and this pit is the center of the hole position that the fitting needs to add.

[0048] Please refer to Figures 1 to 5 As shown, Embodiment 1 of the present invention is: a round hole center positioning tool, including:

[0049] The positioning post 1 is provided with a positioning channel 11. Six positioning channels 11 are evenly distributed along the circumferential direction of the positioning post 1. The positioning channel 11 includes an axial channel 111 parallel to the axis of the positioning post 1 and a radial channel 112 arranged along the radial direction of the positioning post 1. The axial channel 111 is a strip-shaped groove;

[0050] The movable block 2 is movably arranged on the positioning post 1 along the axial direction of the positioning post 1;

[0051] The elastic positioning member 3 has one end connected to the movable block 2 and the other end extending out after passing through the axial channel 111 and the radial channel 112 in sequence.

[0052] The surface of the positioning post 1 is provided with threads, and the movable block 2 is in threaded fit with the positioning post 1. The positioning post 1 includes a lead screw 12 and a guide block 13 assembled coaxially. Both the movable block 2 and the guide block 13 are in threaded fit with the lead screw 12. The lead screw 12 is provided with the axial channel 111 along the generatrix, and the guide block 13 is provided with the radial channel 112 along the radial direction. The guide block 13 includes a positioning nut 131 and a guide nut 132 spliced with each other. Both the positioning nut 131 and the guide nut 132 are in threaded fit with the lead screw 12. The radial channel 112 is formed after the positioning nut 131 and the guide nut 132 are spliced. The splicing surfaces of the positioning nut 131 and the guide nut 132 are both arc surfaces 1311, and arc-shaped guide grooves 1312 are provided on the arc surfaces 1311. The guide groove 1312 of the positioning nut 131 and the guide groove 1312 of the guide nut 132 are spliced to form the radial channel 112. The lead screw 12 includes a first thread portion 121 and a second thread portion 122. The positioning nut 131 is in threaded connection with the first thread portion 121, and both the movable block 2 and the guide nut 132 are in threaded connection with the second thread portion 122. The movable block 2 is provided with an annular card slot 21, and one end of the elastic positioning member 3 is provided with a buckle 31 slidably matched with the annular card slot 21. The elastic positioning member 3 is a strip-shaped elastic piece. A positioning cone 4 is further included. The positioning post 1 is provided with a positioning hole 14 along the axial direction, and the positioning cone 4 is slidably connected with the positioning hole 14. The end of the positioning cone 4 is provided with a conical cone head 41.

[0053] The working principle of this embodiment is as follows: The movable block 2, positioning nut 131, guiding nut 132 and elastic positioning member 3 are assembled on the lead screw 12. First, the positioning nut 131 is fixed on the small-diameter cylinder of the lead screw 12 by threaded connection, and its guiding groove 1312 is aligned with the axial channel 111 of the lead screw 12. Then, the guiding nut 132 is screwed onto the large-diameter cylinder of the lead screw 12 by threaded connection and spliced together with the positioning nut 131. Its arc surface 1311 structure and guiding groove 1312 are aligned with the arc surface 1311 structure and guiding groove 1312 of the positioning nut 131. The buckles 31 of the 6 elastic positioning members 3 are snapped into the positioning slots of the movable block 2, and the other end of the elastic positioning member 3 is inserted into the guiding groove 1312 between the positioning nut 131 and the guiding nut 132. Then, the movable block 2 is screwed onto the large-diameter cylinder of the lead screw 12 by threaded connection. The rotation of the movable block 2 drives the elastic positioning member 3 to move up and down, and the elastic positioning member 3 extends and retracts in the horizontal direction under the influence of the arc surface 1311 structure between the positioning nut 131 and the guiding nut 132. After the fitting and the part to be fitted are assembled, the end face of the positioning nut 131 is abutted against the hole position of the fitting, and then the movable block 2 is rotated. The movable block 2 drives the elastic positioning member 3, and the 6 elastic positioning members 3 will horizontally extend from six directions and finally abut against the inner ring of the hole position of the fitting. The positioning cone 4 is assembled in the lead screw 12 with a clearance fit. The tip of the positioning cone 4 points downward, and the other end protrudes from the lead screw 12. When the elastic positioning member 3 abuts against the inner wall of the hole position of the fitting, the positioning cone 4 is at the center position of the hole. Then, the other end of the positioning cone 4 is struck, and the cone head 41 of the positioning cone 4 will leave a pit on the part to be fitted. This pit is the center of the hole that needs to be added to the fitting, and the hole that needs to be added to the part to be fitted can be drilled through this pit.

[0054] In summary, the circular hole center positioning tool of the present utility model includes a positioning column, a movable block and an elastic positioning member. By moving the movable block on the positioning column, multiple elastic positioning members can be controlled to simultaneously extend and retract through the axial channel and the radial channel. When multiple elastic positioning members extend and simultaneously abut against the hole wall of the fitting, the axis of the positioning column is the center position of the circular hole. The part to be fitted can determine the center accordingly. When in use, it can be used after the two fittings are assembled, without the need for repeated disassembly and assembly. The center of the hole that needs to be added to the part to be fitted can be quickly and accurately marked. There is no need for traditional processes such as drawing lines and positioning that may have errors. The whole tool has a compact structure and is convenient to operate. When there is a deviation in the installation hole positions between the fittings, the circular hole center positioning tool provided by the present utility model can quickly locate the center of the hole that needs to be added to the part to be fitted according to the hole positions of the fittings, and ensure that the installation hole positions between the fittings can be aligned after drilling through the center, facilitating subsequent assembly work.

[0055] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A circular hole center positioning tool, characterized in that: include: A positioning column is provided with positioning channels, wherein two or more positioning channels are evenly distributed along the circumference of the positioning column, and the positioning channels include an axial channel parallel to the axis of the positioning column and a radial channel arranged along the radial direction of the positioning column; A movable block is movably arranged on the positioning column along the axial direction of the positioning column; One end of the elastic positioning piece is connected to the movable block, and the other end passes through the axial channel and the radial channel in sequence and then extends out.

2. The circular hole center positioning tool according to claim 1, characterized in that: The surface of the positioning column is provided with threads, and the movable block is matched with the threads of the positioning column.

3. The circular hole center positioning tool according to claim 1, characterized in that: The positioning column comprises a screw rod and a guide block which are coaxially assembled. Both the movable block and the guide block cooperate with the screw rod thread. The screw rod is provided with an axial channel along the generatrix, and the guide block is provided with a radial channel along the radial direction.

4. The circular hole center positioning tool according to claim 3, characterized in that: The guide block comprises a positioning nut and a guide nut which are spliced ​​with each other. Both the positioning nut and the guide nut cooperate with the screw thread. The positioning nut and the guide nut are spliced ​​to form a radial channel.

5. The circular hole center positioning tool according to claim 4, characterized in that: The joint surfaces of the positioning nut and the guide nut are both arc surfaces, and guide grooves are arranged on the arc surfaces. The guide grooves of the positioning nut and the guide grooves of the guide nut are joined to form a radial channel.

6. The circular hole center positioning tool according to claim 4, characterized in that: The screw rod comprises a first threaded portion and a second threaded portion, the positioning nut is threadedly connected with the first threaded portion, and the movable block and the guide nut are both threadedly connected with the second threaded portion.

7. The circular hole center positioning tool according to claim 1, characterized in that: The movable block is provided with an annular clamping groove, and one end of the elastic positioning piece is provided with a buckle which is slidably matched with the annular clamping groove.

8. The circular hole center positioning tool according to claim 1, characterized in that: The elastic positioning piece is a strip-shaped spring piece.

9. The circular hole center positioning tool according to claim 1, characterized in that: It also includes a positioning cone. The positioning column is provided with a positioning hole along the axial direction. The positioning cone is slidably connected with the positioning hole.

10. The circular hole center positioning tool according to claim 9, characterized in that: The end of the positioning cone is provided with a conical cone head.

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