A rod-type positioning tool for plate parallelism and coaxiality

Abstract

The present invention discloses a rod-type positioning tool for the parallelism and coaxiality of sheet metal, comprising a high-precision mounting shaft with threads at both ends for mounting workpieces, one or more positioning sleeves, and two anti-loosening nuts respectively matched with threads at both ends of the high-precision mounting shaft, the positioning sleeve is sleeved on the high-precision mounting shaft and its two ends are used to abut against the workpieces, and the anti-loosening nuts are used to abut against the workpieces located at both ends of the high-precision mounting shaft. The beneficial effect of the present invention is that by setting the high-precision mounting shaft, the centers of the mounting holes of all the workpieces after installation are located on the center line of the high-precision mounting shaft, and the coaxiality of all the positioned workpieces is maintained. Since the workpieces are perpendicular to the high-precision mounting shaft, all the workpieces are parallel, ensuring the parallelism of the workpieces. The positioning sleeves in the present application are used to separate the workpieces, and the anti-loosening nuts are used to press the workpieces from both ends of the high-precision mounting shaft to fix the workpieces.

Description

Technical Field

[0001] The invention relates to a rod-type positioning tool for plate parallelism and coaxiality. Background Art

[0002] In industrial automation assembly, many sheet materials have requirements for parallelism and coaxiality. Manual installation alone cannot guarantee its accuracy. Multiple installation adjustments will also damage other parts that cooperate with each other, greatly affecting product performance. Multiple adjustments and installations not only increase the cost of assembly, but also increase the corresponding labor, which seriously does not meet the needs of automation. Summary of the invention

[0003] The purpose of the present invention is to provide a rod-type positioning tool for plate parallelism and coaxiality, so as to solve the technical defects of high assembly cost and large labor input caused by multiple adjustment surfaces of plate parallelism and coaxiality in the prior art.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: a rod-type positioning tool for plate parallelism and coaxiality, including a high-precision mounting shaft with threads at both ends and used to install workpieces, more than one positioning sleeve and two anti-loosening nuts that can respectively cooperate with the threads at both ends of the high-precision mounting shaft, the positioning sleeve is sleeved on the high-precision mounting shaft and its two ends are used to abut against the workpiece, and the anti-loosening nut is used to abut against the workpiece located at both ends of the high-precision mounting shaft. The present application sets a high-precision mounting shaft, and the centers of the mounting holes of all the workpieces after installation are located on the center line of the high-precision mounting shaft, so as to maintain the coaxiality of all the positioned workpieces. Since the workpieces are perpendicular to the high-precision mounting shaft, all the workpieces are parallel to ensure the parallelism of the workpieces. The positioning sleeve in the present application is used to separate the workpieces, and the anti-loosening nut is used to press the workpieces from both ends of the high-precision mounting shaft to fix the workpieces. After the present application is clamped once, the workpiece is fixed on the high-precision mounting shaft, and no further adjustment is required later, which reduces the cost of assembly and the labor input of assembly.

[0005] As a further improvement of the present invention, the positioning spacer includes two short spacer units and two long spacer units, the two short spacer units are located near the locking nut, and the adjacent long spacer units and short spacer units are used to clamp the workpiece. The present application uses the long spacer unit and the short spacer unit to limit the distance between the workpieces to meet the requirements.

[0006] As a further improvement of the present invention, a U-shaped partition is provided on the high-precision installation shaft between the two long spacer sleeve units, and the two sides of the U-shaped partition are in contact with the two long spacer sleeve units. The present application provides a U-shaped partition. When disassembling, after loosening the nut, the U-shaped partition and the U-shaped retaining ring at the shaft end can be directly removed first, and then the remaining parts can be taken out in sequence. Disassembly is very convenient. Conversely, when installing, other parts can be installed in sequence first, and then the U-shaped partition and the U-shaped retaining ring can be inserted, and finally the nuts at both ends can be locked.

[0007] As a further improvement of the present invention, the high-precision mounting shaft is provided with a plurality of mounting holes along its radial direction, the long spacer unit and the short spacer unit are provided with positioning holes corresponding to the mounting holes, a ball plunger is provided in the mounting hole, and the ball head of the ball plunger can be matched with the positioning hole. The present application provides a ball plunger, and adopts a spring-loaded ball head so that the downward pressing distance of the ball head can be automatically and flexibly adjusted, thereby eliminating the gap, preventing relative rotation, and facilitating installation and positioning.

[0008] As a further improvement of the present invention, two retaining rings are further included, the retaining rings are sleeved on the high-precision mounting shaft, and the two sides of the retaining rings are used to abut against the anti-loosening nut and the workpiece respectively. The present application provides a retaining ring to separate the anti-loosening nut from the workpiece to prevent damage to the workpiece when the anti-loosening nut is twisted.

[0009] As a further improvement of the present invention, the retaining ring is a U-shaped retaining ring with one side open. The U-shaped retaining ring in the present application is convenient for installation on a high-precision installation shaft.

[0010] As a further improvement of the present invention, the diameter of the high-precision mounting shaft is smaller than the mounting through hole on the workpiece where it is positioned, a first protrusion is provided on the side of the U-shaped retaining ring away from the locking nut, and the first protrusion can extend into the mounting through hole of the workpiece, and a second protrusion is provided on one end of the long spacer sleeve unit away from another long spacer sleeve unit, and the second protrusion can extend into the mounting through hole of the workpiece. The present application adopts the protrusion to further improve the coaxiality of the workpiece, facilitate the positioning of the workpiece, and further improve the processing accuracy of the workpiece.

[0011] In summary, the beneficial effects of the present invention are as follows: the present application is composed of a high-precision mounting shaft and a positioning sleeve, and the positioning surface of the positioning sleeve is relied on to ensure the parallelism between multiple sheets, the end surface processing accuracy is easy to ensure, and the protrusion and the high-precision mounting shaft are used to ensure the coaxiality of the corresponding holes of the sheet material, which meets the use requirements; the present application relies on multiple ball head plungers to eliminate the gap between the high-precision mounting shaft and the positioning sleeve to improve the installation accuracy of the workpiece, and at the same time, the flexible cooperation of the ball head plunger solves the problem of low precision of traditional tooling; in the present application, a U-shaped partition is installed between adjacent positioning sleeves, and the shaft end adopts the shaft end U The U-shaped retaining ring is limited in position. During disassembly, after loosening the nut, you can directly remove the U-shaped partition and the U-shaped retaining ring at the shaft end, and then take out the remaining parts in turn. Disassembly is very convenient. Conversely, during installation, you can first install other parts in turn, then insert the U-shaped partition and U-shaped retaining ring, and finally lock the nuts at both ends. During assembly and disassembly, the ball on the ball plunger can roll with the positioning spacer, changing the sliding friction into rolling friction, reducing the resistance during assembly and disassembly, and solving the problem of difficult installation and disassembly of traditional tooling. The anti-loosening nuts at both ends of the high-precision installation shaft of the application are locked toward the middle, which is easy to adjust and ensures a stable clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the present invention.

[0013] Figure 2 It is a longitudinal cross-sectional view of the present invention.

[0014] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0015] Figure 4 It is a three-dimensional structural schematic diagram of the present invention.

[0016] Among them: 1. high-precision mounting shaft; 2. positioning spacer; 3. anti-loosening nut; 4. workpiece; 5. long spacer unit; 6. short spacer unit; 7. U-shaped partition; 8. mounting hole; 9. positioning hole; 10. ball plunger; 11. U-shaped retaining ring; 12. first protrusion; 13. second protrusion. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings.

[0018] Embodiment 1:

[0019] like Figure 1-Figure 4The rod-type positioning fixture for plate parallelism and coaxiality shown in the figure comprises a high-precision mounting shaft 1 for mounting a plate-type workpiece 4, one or more positioning spacers 2 and two anti-loosening nuts 3, both ends of the high-precision mounting shaft 1 are provided with threads, the center of the positioning spacer 2 is provided with a through hole running through both ends along its length direction (not shown in the figure), the high-precision mounting shaft 1 is inserted into the through hole, the diameter of the through hole in the present application is slightly larger than the diameter of the high-precision mounting shaft 1, and the two are clearance-matched, on the one hand, the two can move relative to each other in the length direction, on the other hand, the two will not have a large relative shaking in the radial direction, so as to facilitate the positioning spacer The sleeve 2 is arranged on the high-precision mounting shaft 1. When in use, the end of the positioning sleeve 2 contacts and presses against the workpiece 4, and is used to fix the workpiece 4 from one side of the workpiece. The two anti-loosening nuts 3 can respectively form a thread pair with the threads at both ends of the high-precision mounting shaft 1, and the anti-loosening nuts 3 and the high-precision mounting shaft 1 are matched by thread matching. The anti-loosening nuts 3 described in the present application are used to contact and press against the workpiece 4 located at both ends of the high-precision mounting shaft 1, and apply force to the workpiece 4 in the length direction of the high-precision mounting shaft 1. The present application tightens the anti-loosening nuts 3 at both ends to press the workpiece 4 and the positioning sleeve 2 to achieve the positioning of the workpiece 4. The high-precision mounting shaft 1 in the present application refers to a shaft with good straightness and no bends, and the diameters of the parts between the two threads of the high-precision mounting shaft 1 are equal, so as to maintain the coaxiality of the workpiece mounted on the high-precision mounting shaft 1. The end of the positioning spacer 2 in the present application is a plane, and the end face of the anti-loosening nut 3 is also a plane. Therefore, after the workpiece 4 is clamped, all the workpieces 4 are perpendicular to the length direction of the high-precision positioning shaft 1, and their parallelism is good.

[0020] The number of the positioning spacers 2 described in this embodiment is preferably set to four, specifically including two short spacer units 6 and two long spacer units 5. The two short spacer units 6 are located near the anti-loosening nut 3, and the space between the adjacent long spacer units 5 and the short spacer units 6 is also used to clamp the workpiece 4, that is, a total of four workpieces 4 are installed on the high-precision installation shaft 1 in this application, and a workpiece 4 is respectively arranged between the two anti-loosening nuts 3 at both ends and the two short spacer units 6, and a workpiece 4 is respectively installed between the two short spacer units 6 and the two long spacer units 5. In this embodiment, the two long spacer units 6 can contact each other at one end away from the short spacer unit 5, and form a limit between each other to prevent the two from sliding relative to the high-precision installation shaft 1 along the length direction of the high-precision installation shaft 1.

[0021] The present application preferentially provides a U-shaped partition plate 7 between the two long spacer sleeve units 5, and the U-shaped partition plate 7 is sleeved on the high-precision installation shaft 1, and the two sides of the U-shaped partition plate 7 abut against the two long spacer sleeve units 5. The present application can select U-shaped partition plates 7 of different widths according to the thickness of the workpiece 4 to be clamped and positioned, and the U-shaped partition plate 7 and the anti-loosening nut 3 together realize the fixation of the workpiece 4 on the high-precision installation shaft 1. During disassembly, after loosening the anti-loosening nut 3, the U-shaped partition plate 7 can be directly removed first, and then the remaining parts can be taken out in sequence, which is very convenient for disassembly. Conversely, during installation, other parts can be installed in sequence first, and then the U-shaped partition plate 7 can be inserted, and finally the anti-loosening nuts 3 at both ends can be locked. The U-shaped opening of the U-shaped partition plate 7 in the present application can be removed without removing the positioning spacers 2 on both sides thereof, which is convenient for the disassembly and installation of the present application.

[0022] Embodiment 2:

[0023] This embodiment is a further improvement on the basis of the first embodiment. Compared with the first embodiment, the high-precision mounting shaft 1 of this embodiment is provided with a plurality of mounting holes 8 along its radial direction. Figure 4 As shown, the long spacer unit 5 and the short spacer unit 6 are both provided with positioning holes 9 corresponding to the mounting holes 8, and the mounting holes 8 are provided with ball plungers 10, and the ball heads of the ball plungers 10 can cooperate with the positioning holes 9. The ball plungers 10 and the installation methods thereof in the present application are prior arts, and are not the improvement points of the present application. The improvement of the present embodiment compared with the first embodiment is that the ball plungers 10 are used to position the positioning spacer 2 to prevent the positioning spacer 2 and the high-precision mounting shaft 1 from rotating relative to each other during use. The preferred number of mounting holes 8 in the present application is four, and each long spacer unit 5 and each Each short spacer unit 6 has a positioning hole 9, and the ball head of the ball plunger 10 is retracted in the mounting hole 8. When the ball head of the ball plunger 10 is extended and located in the positioning hole 9, no additional torque is applied to the positioning spacer 2, and the positioning spacer 2 will not rotate or slide relative to the high-precision mounting shaft 1. The center lines of the four mounting holes 8 preferably in this application are located on the same plane, and the center lines of the mounting holes 8 intersect perpendicularly with the center line of the high-precision mounting shaft 1. On the one hand, it is convenient for the installation and positioning of the positioning spacer 2, and on the other hand, the strength of the high-precision positioning shaft 1 is maintained as much as possible to prevent it from deforming during use. The other structures of this embodiment are the same as those of the first embodiment. Please refer to the first embodiment for details, and this embodiment will not be repeated.

[0024] Embodiment three:

[0025] This embodiment is a further improvement on the basis of the first or second embodiment. Compared with the first or second embodiment, the present embodiment is provided with two retaining rings 11, the retaining rings 11 are sleeved on the high-precision installation shaft 1, and the two sides of the retaining ring 11 are respectively used to abut against the locknut 3 and the workpiece 4 (contact the locknut 3 and the workpiece 4 and abut against the locknut 3 and the workpiece 4 when subjected to force). When the present application is used, the locknut 3 and the workpiece 4 are not in direct contact, so as to prevent the damage to the workpiece 4 caused by the relative rotation between the locknut and the workpiece 4 when the locknut 3 is screwed. In this embodiment, the retaining ring 11 is preferably set as a U-shaped retaining ring with an opening on one side. The retaining ring 11 in the present application has an opening, and the retaining ring 11 can be installed on the high-precision installation shaft 1 when the locknut 3 is screwed on the high-precision installation shaft 1 and is about to contact the workpiece 4, which facilitates the installation of the retaining ring 11 on the high-precision installation shaft 1. The other structures of this embodiment are the same as those of the first or second embodiment, and the first or second embodiment is specifically referred to, and this embodiment is not repeated.

[0026] Embodiment 4:

[0027] This embodiment is a further improvement on the basis of the third embodiment. Compared with the third embodiment, the diameter of the high-precision mounting shaft 1 described in this embodiment is smaller than the mounting through hole (not shown in the figure) on the workpiece 4 where it is positioned. An arc-shaped (i.e., half of a ring-shaped) first protrusion 12 is provided on the side of the U-shaped retaining ring 11 away from the lock nut 3. The first protrusion 12 can be inserted into the mounting through hole of the workpiece 4 and the outer diameter of the first protrusion 12 is equal to the diameter of the mounting through hole of the workpiece 4. An annular second protrusion 13 is provided on the end of the long spacer unit 5 away from the other long spacer unit 5 (i.e., the ends facing each other of the two long spacer units 5). The second protrusion 13 can be inserted into the mounting through hole of the workpiece 4, and the outer diameter of the second protrusion 13 is equal to the diameter of the mounting through hole of the workpiece 4. In this application, the width of the first protrusion 12 and the second protrusion 13 along the length direction of the high-precision mounting shaft 1 is less than or equal to the thickness of the workpiece 4. In this embodiment, the preferred widths of the first protrusion 12 and the second protrusion 13 along the length direction of the high-precision mounting shaft 1 are slightly smaller than the thickness of the workpiece 4. The other structures of this embodiment are the same as those of the third embodiment. Please refer to the third embodiment for details, and this embodiment will not be described in detail.

[0028] The parts not specifically described in the above description are all prior art, or can be implemented by prior art. Moreover, the specific implementation cases described in the present invention are only preferred implementation cases of the present invention, and are not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent application scope of the present invention should be regarded as the technical scope of the present invention.

Claims

1. A rod-type positioning tool for plate parallelism and coaxiality, characterized by: The invention comprises a high-precision installation shaft (1) having threads at both ends and used for installing a workpiece (4), one or more positioning sleeves (2), two anti-loosening nuts (3) respectively capable of matching with the threads at both ends of the high-precision installation shaft (1), and two retaining rings (11). The high-precision installation shaft (1) has good straightness and no bending, and the diameters of the parts between the two threads of the high-precision installation shaft (1) are equal. The center of the positioning sleeve (2) is provided with a through hole penetrating through both ends along its length direction. The high-precision installation shaft (1) is inserted into the through hole. The positioning sleeve (2) is sleeved on the high-precision installation shaft (1). The two are matched with each other with a clearance. The two ends of the positioning sleeve (2) are used to abut against the workpiece (4). The anti-loosening nuts (3) are used to abut against the workpiece (4) located at both ends of the high-precision installation shaft (1). The positioning sleeve (2) comprises two short sleeve units (6) and two long sleeve units (5), the two short sleeve units (6) are located near the locking nut (3), and the adjacent long sleeve units (5) and short sleeve units (6) are used to clamp the workpiece (4); The retaining ring (11) is sleeved on the high-precision mounting shaft (1), and two sides of the retaining ring (11) are used to abut against the anti-loosening nut (3) and the workpiece (4) respectively; The diameter of the high-precision mounting shaft (1) is smaller than the mounting through hole on the workpiece (4) where it is positioned; a first protrusion (12) is provided on the side of the retaining ring (11) away from the locking nut (3); the first protrusion (12) can extend into the mounting through hole of the workpiece (4); a second protrusion (13) is provided on the end of the long spacer sleeve unit (5) away from the other long spacer sleeve unit (5); the second protrusion (13) can extend into the mounting through hole of the workpiece (4); and the width of the first protrusion (12) and the second protrusion (13) along the length direction of the high-precision mounting shaft (1) is less than or equal to the thickness of the workpiece (4); A U-shaped partition plate (7) is provided on the high-precision mounting shaft (1) between the two long spacer sleeve units (5), and two sides of the U-shaped partition plate (7) abut against the two long spacer sleeve units (5); A plurality of mounting holes (8) are formed on the high-precision mounting shaft (1) along its radial direction, the center lines of the mounting holes (8) are located on the same plane, and the center lines of the mounting holes (8) intersect perpendicularly with the center line of the high-precision mounting shaft (1), and positioning holes (9) corresponding to the mounting holes (8) are formed on the long spacer unit (5) and the short spacer unit (6), and a ball plunger (10) is provided in the mounting hole (8), and the ball head of the ball plunger (10) can be matched with the positioning hole (9); When in use, U-shaped partitions (7) of different widths are selected according to the thickness of the workpiece (4) to be clamped and positioned. The U-shaped partitions (7) and the anti-loosening nuts (3) together realize fixing the workpiece (4) on the high-precision mounting shaft (1). When disassembling, the anti-loosening nuts (3) are loosened, and the U-shaped partitions (7) are directly removed first, and then the remaining parts are taken out in sequence. When installing, the other parts are first installed in sequence, and then the U-shaped partitions (7) are inserted, and finally the anti-loosening nuts (3) at both ends are locked.

2. The rod-type positioning tool for plate parallelism and coaxiality according to claim 1 is characterized in that: The retaining ring (11) is a U-shaped retaining ring with an opening on one side.

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