A multi-purpose vertical line scribing tool

Abstract

The application provides a multipurpose perpendicular line drawing tool, which comprises a supporting arm, a connecting rod, a guide sleeve and a guide rod, wherein the first supporting arm and the second supporting arm are sleeved with the pin shaft part of the first guide sleeve at one end to realize the rotary connection of the supporting arms, the first connecting rod and the second connecting rod are sleeved with the pin shaft part of the second guide sleeve at one end to realize the rotary connection of the connecting rods, meanwhile, the first connecting rod and the second connecting rod are rotatably connected to the middle ends of the first supporting arm and the second supporting arm at the ends away from the second guide sleeve, the guide rod is sequentially arranged through the top of the first guide sleeve and the second guide sleeve, and the end of the guide rod is provided with a line drawing assembly, so that the function of drawing the positioning line of the workpiece is realized by sliding the guide rod, and the application has the advantages of simple operation and high positioning precision.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, and in particular relates to a multi-purpose perpendicular line marking tool. Background Technology

[0002] In the assembly process, it is essential to ensure the accurate placement of the contact surfaces of each assembled part before welding to facilitate subsequent production and installation. Therefore, positioning lines are drawn on the contact surfaces of each part before assembly to assist in alignment and installation. However, in the current assembly process, methods such as visual rough alignment or drawing positioning lines using a ruler are difficult to operate, have poor accuracy, and are inefficient, thus affecting subsequent assembly operations. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a multi-purpose perpendicular line drawing tool to solve the technical problems of high difficulty, poor accuracy and low efficiency in drawing positioning lines during the existing workpiece installation process.

[0004] To solve the above problems, the technical solution of the present invention is as follows:

[0005] A multi-purpose perpendicular line marking tool includes: a support arm, a connecting rod, a first guide sleeve, a second guide sleeve, and a guide rod; the support arm includes a first support arm and a second support arm of the same size, with a first hinge hole and a second hinge hole respectively at one end of the first support arm and the second support arm; a first pin is provided in the middle of the first guide sleeve, and the first hinge hole and the second hinge hole are sequentially fitted onto the first pin to realize the rotatable connection between the first support arm and the second support arm; the connecting rod includes a first connecting rod and a second connecting rod of the same size, with a third hinge hole and a fourth hinge hole respectively at one end of the first connecting rod and the second connecting rod; a second pin is provided in the middle of the second guide sleeve, and the third hinge hole and the fourth hinge hole are sequentially fitted onto the second guide sleeve. The second pin enables a rotatable connection between the first connecting rod and the second connecting rod, and the ends of the first connecting rod and the second connecting rod away from the second pin are respectively rotatably connected to the first support arm and the second support arm; the top of the first guide sleeve and the second guide sleeve are respectively provided with a first guide hole and a second guide hole in the same direction, the guide rod passes through the first guide hole and the second guide hole in sequence, and the guide rod can move along the central axis direction of the first guide hole and the second guide hole. The end of the guide rod is provided with a scribing component. During the workpiece assembly and production process, the workpiece is positioned based on the support arm and / or the first guide sleeve, and then the perpendicular bisector scribing operation is performed by the scribing component.

[0006] Preferably, the first arm and the second arm are respectively provided with a first opening and a second opening at the middle part along their respective length directions, and the ends of the first connecting rod and the second connecting rod away from the second pin are respectively rotatably connected to the first opening and the second opening; the end of the first connecting rod away from the second pin is provided with a fixed shaft corresponding to the first opening, and the fixed shaft passes through the first opening to realize the rotatable connection between the first connecting rod and the first arm.

[0007] Preferably, the end of the second connecting rod away from the second pin is provided with a third opening corresponding to the second opening, and the second connecting rod is provided with a locking screw and a locking nut. The locking screw passes through the second opening and the third opening in sequence and is threadedly connected to the locking nut. The rotational connection and locking of the second connecting rod and the second support arm are realized by the cooperation of the locking screw and the locking nut.

[0008] Preferably, the bottom of the first pin is provided with a first outer retaining ring groove, and a first outer retaining ring is provided in the first outer retaining ring groove; the bottom of the second pin is provided with a second outer retaining ring groove, and a second outer retaining ring is provided in the second outer retaining ring groove.

[0009] Preferably, the inner side of the bottom end of the first guide sleeve is provided with a vertical fixing surface that is perpendicular to the center line of the first guide hole.

[0010] Preferably, the marking assembly includes a swing sleeve and a marking pen; the end of the guide rod is provided with a groove, and the two end faces of the groove are provided with pin holes; the connecting end of the swing sleeve is provided with a support hole corresponding to the pin hole; the connecting end of the swing sleeve is engaged in the groove and is rotatably connected to the guide rod by a pin passing through the pin hole and the support hole.

[0011] Preferably, the swing sleeve has a vertical through-hole inside, and the marking pen is disposed in the through-hole.

[0012] Preferably, the side end of the swing sleeve is provided with a transverse fixing hole intersecting the channel, a fixing rod is provided in the fixing hole, and the fixing hole and the fixing rod are connected by threads. The tail end of the fixing rod abuts against the side of the drawing pen to fix the drawing pen.

[0013] Preferably, the top surface of the guide rod is provided with a guide groove, and the top end of the second guide sleeve is provided with a vertical limiting hole that extends through to the second guide hole. A limiting pin is provided in the limiting hole and the bottom end of the limiting pin is inserted into the guide groove to limit the rotation of the guide rod.

[0014] Preferably, the first support arm and the second support arm are respectively provided with a first positioning hole and a second positioning hole at the ends away from the first guide sleeve, and a first positioning pin and a second positioning pin are respectively provided vertically in the first positioning hole and the second positioning hole.

[0015] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art:

[0016] (1) The multi-purpose perpendicular line drawing tool of the present invention has a rhomboid structure formed by the cooperation of the support arm and the connecting rod. The perpendicular line is drawn in the direction of the center plane of the positioning pin on both sides using the guide rod. After the angle of the support arm is confirmed, the connection position of the support arm and the connecting rod is locked and fixed. At the same time, a limit pin is provided to prevent the guide rod from rotating, so as to ensure the stability of the device and the accuracy of the perpendicular line during the drawing process.

[0017] (2) The multi-purpose perpendicular line drawing tool of the present invention is fixed at three points by the positioning pins on both sides and the bottom end of the first guide sleeve. It can be used to draw perpendicular lines of workpieces of various shapes, including but not limited to rectangular workpieces, round tube workpieces and workpieces with symmetrical holes. At the same time, the drawing component at the end of the guide rod can rotate within a certain angle, making the present invention applicable to more objects.

[0018] (3) The multi-purpose vertical line drawing tool of the present invention has a simple structure and is easy to operate. The structure of the present invention can be enlarged or reduced proportionally according to the size of different objects, which further improves the applicable scenarios. Attached Figure Description

[0019] Figure 1 The present invention provides a schematic diagram of the structure of a multi-purpose perpendicular line drawing tool.

[0020] Figure 2 A schematic diagram of the first support arm structure provided by the present invention.

[0021] Figure 3 A schematic diagram of the first guide sleeve structure provided by the present invention.

[0022] Figure 4 A schematic diagram of the second guide sleeve structure provided by the present invention.

[0023] Figure 5 A schematic diagram of the guide rod structure provided by this invention.

[0024] Figure 6 A schematic diagram of the swing sleeve structure provided by the present invention.

[0025] Figure 7 This invention provides a schematic diagram of the positioning lines between flange holes.

[0026] Figure 8This invention provides a schematic diagram of the positioning lines for cylindrical workpieces.

[0027] Figure 9 This invention provides a schematic diagram of the positioning lines for a rectangular workpiece.

[0028] Figure 10 This invention provides a schematic diagram of the positioning lines for rectangular groove-type workpieces.

[0029] Explanation of reference numerals in the attached drawings: 10: First support arm; 100: First hinge hole; 101: First opening; 102: First positioning hole; 11: Second support arm; 20: First connecting rod; 21: Second connecting rod; 30: First guide sleeve; 300: First guide hole; 301: First pin; 302: First outer retaining ring groove; 303: Fixed surface; 31: Second guide sleeve; 310: Second guide hole; 311: Second pin; 312: Second outer retaining ring groove; 40: Guide rod; 400: Groove; 401: Pin hole; 402: Guide groove; 50: Swing sleeve; 500: Channel; 501: Support hole; 502: Fixing hole; 60: Marking pen; 70: Locking nut; 71: Locking screw; 80: First positioning pin; 81: Second positioning pin; 90: Limiting pin. Detailed Implementation

[0030] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a more comprehensive overview of the multi-purpose perpendicular line marking tool proposed in this invention. The advantages and features of the invention will become clearer from the following description and claims.

[0031] First Embodiment

[0032] See Figures 1 to 6This embodiment provides a multi-purpose perpendicular line marking tool, comprising: a support arm, a connecting rod, a first guide sleeve 30, a second guide sleeve 31, and a guide rod 40; the support arm includes a first support arm 10 and a second support arm 11 of the same size, with a first hinge hole 100 and a second hinge hole respectively provided at one end of the first support arm 10 and the second support arm 11; a first pin 301 is provided in the middle of the first guide sleeve 30, and the first hinge hole 100 and the second hinge hole are sequentially fitted onto the first pin 301 to realize the perpendicular line marking of the first support arm 10 and the second support arm 11. Rotatable connection; the connecting rod includes a first connecting rod 20 and a second connecting rod 21 of the same size, one end of the first connecting rod 20 and the second connecting rod 21 are respectively provided with a third hinge hole and a fourth hinge hole; a second guide sleeve 31 is provided in the middle of a second pin 311, the third hinge hole and the fourth hinge hole are sequentially sleeved on the second pin 311 to realize the rotational connection between the first connecting rod 20 and the second connecting rod 21, and the ends of the first connecting rod 20 and the second connecting rod 21 away from the second pin 311 are respectively rotatably connected to the first support arm 10 and the second support arm 11. The top of the first guide sleeve 30 and the second guide sleeve 31 are respectively provided with a first guide hole 300 and a second guide hole 310 in the same direction. The guide rod 40 passes through the first guide hole 300 and the second guide hole 310 in sequence, and the guide rod 40 can move along the central axis of the first guide hole 300 and the second guide hole 310. The end of the guide rod 40 is provided with a scribing assembly. During the workpiece assembly production process, the workpiece is positioned based on the support arm and / or the first guide sleeve 30, and then the perpendicular bisector scribing operation is performed by the scribing assembly.

[0033] This embodiment provides a multi-purpose perpendicular line marking tool, consisting of two sets of identical-sized support arms and two sets of identical-sized connecting rods, which cooperate to form a rhombus structure. One end of the first support arm 10 and the second support arm 11 are sequentially fitted onto the first pin 301 through hinge holes, achieving a rotatable connection between the first support arm 10 and the second support arm 11. Similarly, one end of the first connecting rod 20 and the second connecting rod 21 are sequentially fitted onto the second pin 311 through hinge holes, achieving a rotatable connection between the first connecting rod 20 and the second connecting rod 21. Simultaneously, the ends of the first connecting rod 20 and the second connecting rod 21 away from the second pin 311 are respectively rotatably connected to the first support arm 10 and the second support arm 11, so that the two sets of support arms and the two sets of connecting rods form a rhombus structure with adjustable angles.

[0034] The guide rod 40 passes through the first guide hole 300 and the second guide hole 310 in sequence. The first guide sleeve 30, which is the rotational connection point of the first support arm 10 and the second support arm 11, is taken as the first base point. The ends of the first support arm 10 and the second support arm 11 away from the first guide sleeve 30 are taken as the second base point and the third base point. The movement trajectory of the guide rod 40 is in the vertical plane of the perpendicular line in the figure constructed by the three base points.

[0035] Meanwhile, a scribing assembly is provided at the end of the guide rod 40. The guide rod 40 can slide to control the horizontal position of the scribing assembly, so as to draw the required positioning line marks on the workpiece.

[0036] Preferably, the first arm 10 and the second arm 11 are respectively provided with a first opening 101 and a second opening at the middle part along their respective length directions, and the end of the first connecting rod 20 away from the second pin 311 is provided with a fixed shaft, which passes through the first opening 101 to realize the rotational connection between the first connecting rod 20 and the first arm 10.

[0037] Preferably, the end of the second connecting rod 21 away from the second pin 311 is provided with a third opening corresponding to the second opening. At the same time, a locking screw 71 is provided, which passes through the second opening and the third opening in sequence and is threadedly connected to a locking nut 70. The locking screw 71 and the locking nut 70 cooperate to realize the rotational connection between the second connecting rod 21 and the second support arm 11. When it is necessary to adjust the placement angle of the first support arm 10 and the second support arm 11, the threaded connection can be loosened to realize the rotation of the second connecting rod 21 and the second support arm 11. After the placement position of the first support arm 10 and the second support arm 11 is confirmed, the threaded connection can be tightened to ensure the stability and accuracy of the device in the process of drawing vertical lines.

[0038] Preferably, the bottom of the first pin 301 is provided with a first outer retaining ring groove 302, and a first outer retaining ring is provided in the first outer retaining ring groove 302. The bottom of the second pin 311 is provided with a second outer retaining ring groove 312, and a second outer retaining ring is provided in the second outer retaining ring groove 312. The outer retaining ring groove and the outer retaining ring cooperate to fix the support arm and the connecting rod at the pin positions of the first guide sleeve 30 and the second guide sleeve 31, respectively.

[0039] Preferably, the bottom inner side of the first guide sleeve 30 is provided with a vertical fixing surface 303 in the same direction as the first guide hole 300. During the workpiece drawing process, the fixing surface 303 is close to the end face of the workpiece to ensure that the direction of the drawn vertical line is accurate.

[0040] Preferably, the marking assembly includes a swing sleeve 50 and a marking pen 60. The end of the guide rod 40 is provided with a groove 400, and the two end faces of the groove 400 are provided with pin holes 401. The connecting end of the swing sleeve 50 is provided with a support hole 501 corresponding to the pin hole 401. The connecting end of the swing sleeve 50 can be snapped into the groove 400 and is rotatably connected to the guide rod 40 by a pin passing through the pin hole 401 and the support hole 501.

[0041] Preferably, the swing sleeve 50 has a vertical through hole 500 inside, and the marking pen 60 is disposed inside the hole 500.

[0042] Preferably, the side end of the swing sleeve 50 is provided with a transverse fixing hole 502 intersecting with the channel 500. A fixing rod is provided in the fixing hole 502, and the fixing hole 502 and the fixing rod are connected by threads. The tail end of the fixing rod abuts against the side of the scribing pen 60 to fix the scribing pen 60. During the workpiece positioning line drawing process, the vertical height of the scribing pen 60 head and the angle of the swing sleeve 50 can be adjusted according to the actual situation, so that the present invention can be applied to the application needs of different scenarios.

[0043] Specifically, the tip of the 60-inch drawing pen can be fitted with a pigment cartridge or inlaid with a hard alloy tip, depending on the actual situation.

[0044] Preferably, the top surface of the guide rod 40 is provided with a guide groove 402, and the top end of the second guide sleeve 31 is provided with a vertical limiting hole that extends through to the second guide hole 310. A limiting pin 90 is provided in the limiting hole and the bottom end of the limiting pin 90 is inserted into the guide groove 402. During the workpiece positioning line drawing process, the guide rod 40 can be prevented from rotating, thereby improving the stability and drawing accuracy of the present invention.

[0045] Preferably, the first arm 10 and the second arm 11 are respectively provided with a first positioning hole 102 and a second positioning hole at the ends away from the first guide sleeve 30. The first positioning hole 102 and the second positioning hole are respectively provided with a first positioning pin 80 and a second positioning pin 81 vertically. During the workpiece positioning line drawing process, the positioning and fixing functions of both sides of the workpiece can be realized through the first positioning pin 80 and the second positioning pin 81.

[0046] During the assembly and production process of workpieces, especially in the production and assembly process of electromagnetic flowmeters, the guide tube and flange need to be assembled and positioned before welding. In order to ensure that the mounting hole positions of the flanges at both ends of the electromagnetic flowmeter are consistent, positioning lines need to be drawn on both the guide tube and the flanges at both ends. During assembly, the assembly should be aligned with the positioning lines.

[0047] See Figure 7 When drawing the positioning line between the flange holes, the angles of the first support arm 10 and the second support arm 11 can be adjusted so that the first positioning pin 80 and the second positioning pin 81 are tightly fixed to the relative positions of the inner walls of the two flange holes. The device is fixed by the cooperation of the locking screw 71 and the locking nut 70. The scribing assembly is adjusted to a suitable angle and height, and the sliding guide rod 40 controls the scribing assembly to draw the center line between the two holes.

[0048] Second Embodiment

[0049] The positioning lines for electromagnetic flowmeter guide tubes or other circular pipe workpieces can also be drawn using a multi-purpose vertical line drawing tool provided in this embodiment. See [link / reference]. Figure 8In the application of positioning line drawing for cylindrical workpieces, the first positioning pin 80 and the second positioning pin 81 can be replaced with long positioning pins. The angle of the first support arm 10 and the second support arm 11 is adjusted so that the first positioning pin 80 and the second positioning pin 81 are close to the outer wall of the cylindrical tube. The device is fixed by the cooperation of the locking screw 71 and the locking nut 70. At the same time, the fixing surface 303 at the bottom of the first guide sleeve 30 is close to the end face of the cylindrical tube. The scribing assembly is adjusted to a suitable angle and height, and the sliding guide rod 40 controls the scribing assembly to draw the central axis of the cylindrical tube.

[0050] Third Embodiment

[0051] See Figure 9 This embodiment provides a multi-purpose perpendicular line drawing tool that can be used to draw positioning lines on rectangular workpieces. By adjusting the angle between the first arm 10 and the second arm 11, the first positioning pin 80 and the second positioning pin 81 are made to fit tightly against the outer side of the rectangular workpiece, and the fixing surface 303 at the bottom of the first guide sleeve 30 is in close contact with the end face of the rectangular workpiece. By adjusting the drawing assembly to a suitable angle and height, and controlling the drawing assembly by sliding the guide rod 40, the perpendicular line of the rectangular workpiece can be drawn.

[0052] Fourth embodiment

[0053] See Figure 10 This embodiment provides a multi-purpose perpendicular line drawing tool that can be used to draw positioning lines for rectangular groove workpieces. By adjusting the angle of the first arm 10 and the second arm 11, the first positioning pin 80 and the second positioning pin 81 are pressed against the inner side of the groove of the rectangular groove workpiece, and the fixing surface 303 at the bottom of the first guide sleeve 30 is pressed against the end face of the rectangular groove workpiece. By adjusting the drawing assembly to a suitable angle and height, the perpendicular line of the rectangular groove workpiece can be drawn by controlling the drawing assembly with the sliding guide rod 40.

[0054] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A multi-purpose perpendicular line marking tool, characterized in that, include: Support arm, connecting rod, first guide sleeve, second guide sleeve, and guide rod; The support arm includes a first support arm and a second support arm of the same size. One end of the first support arm and the second support arm are respectively provided with a first hinge hole and a second hinge hole. The first guide sleeve is provided with a first pin in the middle. The first hinge hole and the second hinge hole are sequentially sleeved on the first pin to realize the rotational connection between the first support arm and the second support arm. The connecting rod includes a first connecting rod and a second connecting rod of the same size. One end of the first connecting rod and the second connecting rod are respectively provided with a third hinge hole and a fourth hinge hole. The second guide sleeve is provided with a second pin in the middle. The third hinge hole and the fourth hinge hole are sequentially sleeved on the second pin to realize the rotational connection between the first connecting rod and the second connecting rod. The ends of the first connecting rod and the second connecting rod away from the second pin are respectively rotatably connected to the first support arm and the second support arm. The top of the first guide sleeve and the second guide sleeve are respectively provided with a first guide hole and a second guide hole in the same direction. The guide rod passes through the first guide hole and the second guide hole in sequence, and the guide rod can move along the central axis of the first guide hole and the second guide hole. The end of the guide rod is provided with a scribing component. During the workpiece assembly and production process, the workpiece is positioned based on the support arm and / or the first guide sleeve, and then the scribing component is used to perform the perpendicular bisector scribing operation. The second connecting rod has a third opening at the end away from the second pin, which corresponds to the second opening of the second support arm. The second connecting rod also has a locking screw and a locking nut. The locking screw passes through the second opening and the third opening in sequence and is threadedly connected to the locking nut. The locking screw and the locking nut cooperate to achieve the rotational connection and locking of the second connecting rod and the second support arm. The first support arm and the second support arm have a first positioning hole and a second positioning hole at the ends away from the first guide sleeve, respectively. The first positioning hole and the second positioning hole are respectively vertically provided with a first positioning pin and a second positioning pin.

2. The multi-purpose perpendicular line marking tool as described in claim 1, characterized in that, The first arm and the second arm are respectively provided with a first opening and a second opening at the middle part along their respective length directions. The ends of the first connecting rod and the second connecting rod away from the second pin are respectively rotatably connected to the first opening and the second opening. The end of the first connecting rod away from the second pin is provided with a fixed shaft corresponding to the first opening. The fixed shaft passes through the first opening to realize the rotatable connection between the first connecting rod and the first arm.

3. The multi-purpose perpendicular line marking tool as described in claim 1, characterized in that, The The bottom of the first pin is provided with a first outer retaining ring groove, and a first outer retaining ring is provided in the first outer retaining ring groove; the bottom of the second pin is provided with a second outer retaining ring groove, and a second outer retaining ring is provided in the second outer retaining ring groove.

4. A multi-purpose perpendicular line marking tool as described in claim 1, characterized in that, The bottom inner side of the first guide sleeve is provided with a vertical fixing surface that is perpendicular to the center line of the first guide hole.

5. A multi-purpose perpendicular line marking tool as described in claim 1, characterized in that, The marking assembly includes a swing sleeve and a marking pen; the end of the guide rod is provided with a groove, and the two end faces of the groove are provided with pin holes. The connecting end of the swing sleeve is provided with a support hole corresponding to the pin hole. The connecting end of the swing sleeve is engaged in the groove and is rotatably connected to the guide rod by a pin passing through the pin hole and the support hole.

6. A multi-purpose perpendicular line marking tool as described in claim 5, characterized in that, The swing sleeve has a vertical through-hole inside, and the marking pen is located inside the through-hole.

7. A multi-purpose perpendicular line marking tool as described in claim 6, characterized in that, The swing sleeve has a transverse fixing hole that intersects with the channel. A fixing rod is provided in the fixing hole, and the fixing hole and the fixing rod are connected by a thread. The tail end of the fixing rod abuts against the side of the drawing pen to fix the drawing pen.

8. A multi-purpose perpendicular line marking tool as described in claim 1, characterized in that, The top surface of the guide rod is provided with a guide groove, and the top end of the second guide sleeve is provided with a vertical limiting hole that extends through to the second guide hole. A limiting pin is provided in the limiting hole and the bottom end of the limiting pin is inserted into the guide groove to limit the rotation of the guide rod.

Images