A quick positioning and clamping device

Abstract

To address the technical problem of cumbersome operation and large positioning errors in the assembly of components for a certain type of flame tube product, which cannot meet production requirements using existing clamps, this invention provides a rapid positioning and clamping device. This invention utilizes a positioning unit to position shell-shaped parts A and B that constitute the flame tube product. Then, an anti-rotation unit prevents shell-shaped part B from rotating. Finally, a transmission unit simultaneously drives three sets of clamping units to synchronously press down on shell-shaped part B. This allows for rapid and accurate positioning and clamping of shell-shaped parts A and B, ensuring product assembly quality. Furthermore, the operation is simple, convenient, and highly efficient.

Description

Technical Field

[0001] This invention relates to the field of fixture design, and in particular to a quick positioning and clamping device for assembled parts. Background Technology

[0002] A certain type of flame tube product assembly is composed of shell-shaped part A and shell-shaped part B connected by rivets C, as shown in the following structure. Figure 1 During the machining process, the riveting holes need to be drilled in combination. To meet the performance requirements of this flame tube product, the shell-shaped parts A and B, after being assembled, need to ensure a high degree of coaxiality; otherwise, it is difficult to guarantee machining accuracy. However, the existing positioning and clamping fixtures are cumbersome to operate, have large positioning errors, and cannot meet production needs. Summary of the Invention

[0003] In order to solve Figure 1 The present invention addresses the technical problem that existing clamping methods are cumbersome and have large positioning errors when assembling components of the flame tube product. The present invention provides a rapid positioning and clamping device.

[0004] The technical solution adopted in this invention is:

[0005] A quick-positioning and clamping device, characterized in that it is used for quickly positioning and clamping shell-shaped parts A and B, which constitute a flame tube product assembly; the quick-positioning and clamping device includes:

[0006] The support unit is used to bear and support the positioning unit, force transmission unit, clamping unit, first anti-rotation unit, and second anti-rotation unit;

[0007] The positioning unit is used to position and support shell-shaped part A and shell-shaped part B.

[0008] The transmission unit is used to transmit power to the clamping unit, which drives the clamping unit to press down and detach from the shell-shaped part B;

[0009] The clamping unit is used to press the shell-shaped part B downward during assembly and works together with the positioning unit to clamp the shell-shaped part B and the shell-shaped part A; the clamping unit can also disengage from the shell-shaped part B to remove the part after assembly.

[0010] The first anti-rotation unit is used to engage with the protrusion on the inner cavity of the shell-shaped part A to prevent the shell-shaped part A from rotating.

[0011] The second anti-rotation unit is used to cooperate with the bushing on the shell-shaped part B to prevent the shell-shaped part B from rotating. The first and second anti-rotation units work together to ensure that the relative positions of the shell-shaped parts A and B in the circumferential direction are within the allowable range of assembly error.

[0012] Furthermore, it also includes a guide unit, which is used to guide some of the moving parts in the transmission unit to improve their motion accuracy and stability.

[0013] Furthermore, it also includes a quick-release unit for quickly disengaging the clamping unit from the shell-shaped part B after assembly.

[0014] Furthermore, the transmission unit includes a knurled nut, a connecting bolt, a connecting piece, a connecting block, and a hinge bolt connected sequentially along the power transmission direction; there are three connecting blocks, one end of which is hinged to the lower part of the connecting piece, and the three connecting blocks are evenly distributed along the circumference; there are three hinge bolts, the head ring of which is hinged to the other end of the connecting block, and the screw is connected to the clamping unit.

[0015] When the knurled nut rotates, it can drive the connecting bolt and the connecting piece to move up and down. The up and down movement of the connecting piece can synchronously drive the three connecting blocks to rotate synchronously, and then synchronously drive the three hinge bolts to rotate synchronously. The three hinge bolts synchronously pull the clamping unit downward to press the shell-shaped part B.

[0016] Furthermore, the support unit includes a support, a base, and a housing arranged coaxially from bottom to top;

[0017] The base includes a platform and legs. The platform has three first bolt holes evenly distributed around the circumference for the hinge bolts to pass through. The center of the platform has a central through hole for accommodating the connector and the lower part of the housing. Three rectangular enlarged holes are also evenly machined around the circumference on the side wall of the central through hole in the radial direction.

[0018] The support is fixedly installed below the platform of the base and within the space enclosed by the legs of the base. The support is generally annular, with a central through hole for accommodating the connector. Three rectangular slots are evenly distributed along the circumference on its upper surface. Each rectangular slot extends radially outward to form a double-ear seat. The three rectangular slots are respectively aligned with the three rectangular enlarged holes on the base. The three double-ear seats are respectively hinged to the middle of the three connecting blocks in the transmission unit, and the junction forms the rotation shaft of the connecting block.

[0019] The housing includes a stepped sleeve and an extended disc disposed in the lower part of the outer wall of the stepped sleeve; a positioning shoulder is formed at the stepped surface of the outer wall of the stepped sleeve; the inner cavity of the stepped sleeve is also a stepped hole, with an upper small hole and a lower small hole for installing bushings of different sizes; a first pin hole is radially opened on the side wall of the upper small hole, which passes through the inside and outside of the hole. By inserting a pin into the first pin hole and pressing it against the bushing located in the upper small hole, the bushing can be detachably installed in the upper small hole; the extended disc is fixedly connected to the housing, the base, and the support.

[0020] Furthermore, the positioning unit includes a positioning component and a positioning bushing;

[0021] A positioning element is disposed between the housing and the base, and the positioning element extends radially out of the edge of the housing; the positioning element is used to position and support the lower inner wall of the shell-shaped part B.

[0022] The positioning bushing is in the shape of a hollow cylinder, and its upper side wall is provided with a positioning boss that extends radially outward. This positioning boss is used to support and position the lower end of the central through hole at the top of the shell-shaped part A.

[0023] Furthermore, the clamping unit includes three pressure plates evenly distributed along the circumference, screws, nuts, and grooves on the base platform; each pressure plate includes a horizontal plate and a vertical plate; the horizontal plate has bolt holes and screw holes; the bolt holes are used to install the hinge bolts in the transmission unit; the upper part of the vertical plate extends outward to form a positioning pressing edge, used to clamp the protruding structure on the outer wall of the shell-shaped part B; the side wall shape of the vertical plate opposite to the shell-shaped part B is adapted to the shape of the shell-shaped part B to make close contact with the shell-shaped part B; the screws are installed on the horizontal plate of the pressure plate, and the nuts are installed on the screws, with the lower end of the screws corresponding to the grooves on the platform; when the pressure plate is pressed down, the screws first contact the grooves to form a fulcrum, so that the force is mainly concentrated on the vertical plate of the pressure plate; by adjusting the downward movement height of each screw, it can be ensured that each pressure plate simultaneously and reliably clamps the shell-shaped part B.

[0024] Furthermore, the bolt through hole is a U-shaped hole.

[0025] Furthermore, the first anti-rotation unit includes a head positioning member disposed at the positioning shoulder on the upper part of the housing; the head positioning member is an annular part with two sets of boss units on its upper end face, each set of boss units including a first boss and a second boss disposed at intervals, and a trapezoidal groove is formed between the first boss and the second boss that respectively matches two protrusions on the inner cavity of the shell-shaped part A; when the shell-shaped part A is correctly placed on the head positioning member, the two protrusions on the inner cavity of the shell-shaped part A are respectively inserted into the two trapezoidal grooves, thereby achieving the positioning and anti-rotation of the shell-shaped part A;

[0026] The second anti-rotation unit is disposed on the platform of the base, and its specific position is determined according to the allowable error of the relative position of shell parts A and B along the circumferential direction. The second anti-rotation unit includes a bracket, a rod, a cover plate, a slider, and a hand-turning screw. The lower part of the bracket is fixedly installed on the platform of the base in the support unit. The upper part of the bracket has a U-shaped support frame. One end of the rod is used to insert into the bushing hole on the shell part B to achieve anti-rotation, and the middle part of the rod is placed inside the U-shaped support frame. The cover plate is installed at the upper opening of the U-shaped support frame to prevent the rod from coming out. The slider is fitted outside the rod and also located inside the U-shaped support frame. It is used to limit the position of the rod in the circumferential direction of the shell-shaped part B, thereby improving the anti-rotation positioning accuracy of the shell-shaped part B. The slider can also be finely adjusted along the direction from the opening of the U-shaped support frame to the bottom, so as to adapt to the positional error of the bushing hole welded on the shell-shaped part B. The hand screw is installed on the side wall of the U-shaped support frame and is used to pass through the slider and insert into the U-shaped hole on the side wall of the rod, so as to ensure that the rod can move flexibly in the axial direction and prevent it from being pulled out of the U-shaped support frame.

[0027] Furthermore, the quick-release unit also includes an open washer disposed between the knurled nut and the shell-shaped part A, a first spring sleeved outside the connecting bolt and located between the positioning bushing and the connecting member, and a second spring and two washers sleeved outside each of the hinge bolts. The second spring is located between the pressure plate and the platform of the base, and the two washers are located at the two ends of the second spring for limiting its movement.

[0028] The beneficial effects of this invention are:

[0029] 1. This invention uses a positioning unit to position shell-shaped parts A and B, then uses an anti-rotation unit to prevent shell-shaped part B from rotating, and then uses a transmission unit to simultaneously drive three sets of clamping units to press down shell-shaped part B synchronously. This can quickly and accurately position and clamp shell-shaped parts A and B, ensuring product assembly quality. It is also simple, convenient, and highly efficient to operate.

[0030] 2. The present invention is simple to operate. After placing shell-shaped parts A and B on the present invention, they can be positioned and clamped simply by rotating the knurled nut.

[0031] 3. This invention uses a positioning bushing to position and support shell-shaped part A, a positioning component to position and support shell-shaped part B, and two anti-rotation units to position and prevent rotation of shell-shaped parts A and B respectively. Furthermore, the structure and assembly position relationship of the positioning component, positioning bushing, and anti-rotation unit are all adapted and designed according to shell-shaped parts A and B and their assembly tolerance range, thus the positioning error is small.

[0032] 4. Based on the structural features of shell-shaped parts A and B, the present invention designs corresponding first and second anti-rotation units to prevent rotation and position them respectively. If shell-shaped parts A or B are misplaced, they cannot be installed in place, thus enabling the quick positioning and clamping device of the present invention to have the function of preventing human error. Attached Figure Description

[0033] Figure 1 This is a structural schematic diagram of a certain type of flame tube product component, where (a) is a structural schematic diagram of shell-shaped parts A and B after assembly, (b) is a structural schematic diagram of shell-shaped part A, and (c) is a structural schematic diagram of shell-shaped part B.

[0034] Figure 2 This is a cross-sectional view of the quick positioning and clamping device of the present invention.

[0035] Figure 3 This is a top view of the quick positioning and clamping device of the present invention.

[0036] Figure 4 yes Figure 2 A-direction view.

[0037] Figure 5 This is a schematic diagram of the base structure in the quick positioning and clamping device of the present invention, wherein (a) is a perspective view, (b) is a top view, (c) is a sectional view, and (d) is a view from direction B in figure (c).

[0038] Figure 6 This is a schematic diagram of the connecting block in the quick positioning and clamping device of the present invention, wherein (a) is a perspective view, (b) is a top view, and (c) is a sectional view.

[0039] Figure 7 This is a schematic diagram of the connecting member in the quick positioning and clamping device of the present invention, wherein (a) is a perspective view, (b) is a top view, and (c) is a sectional view.

[0040] Figure 8 This is a schematic diagram of the support structure in the quick positioning and clamping device of the present invention, wherein (a) is a perspective view, (b) is a top view, and (c) is a sectional view.

[0041] Figure 9 This is a schematic diagram of the head positioning component in the quick positioning and clamping device of the present invention, wherein (a) is a perspective view and (b) is a cross-sectional view.

[0042] Figure 10 This is a schematic diagram of the housing structure in the quick positioning and clamping device of the present invention, wherein (a) is a perspective view and (b) is a cross-sectional view.

[0043] Figure 11 This is a schematic diagram of the pressure plate in the quick positioning and clamping device of the present invention.

[0044] Figure 12 This is a three-dimensional model diagram of the rapid positioning and clamping device of the present invention.

[0045] Figure label:

[0046] 1. Base; 101. Tabletop; 1011. Limiting groove; 1012. First bolt through hole; 102. Support leg; 1013. Central through hole; 10131. Rectangular enlarged hole; 1014. Second bolt through hole; 1015. First locating pin hole;

[0047] 2. Connecting block; 201. Single ear seat; 202. Double ear seat; 203. Third pin hole;

[0048] 3. Connecting parts; 301. Connecting sleeve; 302. Connecting base; 3021. Circumferential groove; 3022. Radial groove; 303. Second pin hole;

[0049] 4. Support; 401. Rectangular groove; 402. Double-eared seat; 4021. Round hole; 403. Second locating pin hole; 404. Third bolt through hole; 405. Connector mounting hole;

[0050] 5. A positioning component;

[0051] 6. Housing; 601. Stepped sleeve; 6011. Upper small hole; 6012. Lower large hole; 6013. First pin hole; 602. Outer disc; 6021. Threaded hole; 6022. Third locating pin hole; 603. Plane; 604. Locating shoulder.

[0052] 7. Pressure plate; 701. Horizontal plate; 7011. Bolt through hole; 7012. Screw through hole; 702. Vertical plate; 7021. Positioning pressure edge;

[0053] 8. First spring;

[0054] 9. Head positioning component; 901. Screw hole; 902. First protrusion; 903. Second protrusion;

[0055] 10. Positioning bushing; 11. Connecting bolt; 12. Knurled nut; 13. Cover plate; 14. Rod; 15. Slider; 16. Bracket; 17. Knurled head hand screw; 18. First screw; 19. Guide bushing; 20. Washer; 21. Hinged bolt; 22. Open washer; 23. First cylindrical pin; 24. Threaded cylindrical pin; 25. Second cylindrical pin; 26. Third cylindrical pin; 27. Fourth cylindrical pin; 28. Second screw; 29. ​​Fifth cylindrical pin; 30. Third screw; 31. Pin; 32. Bolt; 33. Nut; 34. Second spring. Detailed Implementation

[0056] The present invention will be further described in detail below with reference to the accompanying drawings.

[0057] The quick positioning and clamping device provided by the present invention includes a support unit, a positioning unit, a transmission unit, a clamping unit, and an anti-rotation unit.

[0058] The support unit is used to bear and support the positioning unit, force transmission unit, clamping unit, and anti-rotation unit.

[0059] The positioning unit is used to position shell-shaped part A and shell-shaped part B respectively.

[0060] The transmission unit is used to transmit power to the clamping unit, which drives the clamping unit to press down and detach from the shell-shaped part B.

[0061] The clamping unit is used to press the shell-shaped part B downward during assembly and works together with the positioning unit to clamp the shell-shaped part B and the shell-shaped part A; the clamping unit can also disengage from the shell-shaped part B to remove the part from the quick positioning clamping device after assembly.

[0062] The first anti-rotation unit is used to cooperate with two protrusions on the inner cavity of the shell-shaped part A to prevent the shell-shaped part A from rotating.

[0063] The second anti-rotation unit is used to mate with the bushing hole D on the shell-shaped part B to prevent the shell-shaped part B from rotating.

[0064] Example:

[0065] like Figure 2 , 4 As shown, the support unit includes a support 4, a base 1, and a housing 6 arranged coaxially from bottom to top.

[0066] like Figure 5 As shown, the base 1 includes a platform 101 and legs 102. The platform 101 has three first bolt through holes 1012 evenly distributed along the same circumference for the hinge bolts 21 in the transmission unit to pass through. The edge of the platform 101 has three grooves 1011 evenly distributed along the same circumference. The center of the platform 101 has a central through hole 1013. The central through hole 1013 is used to accommodate the connector 3 in the transmission unit and the lower part of the housing 6. The platform 101 also has three second bolt through holes 1014 and two first locating pin holes 1015 evenly distributed along the circumference. The second bolt through holes 1014 and the first locating pin holes 1015 are all located between the first bolt through holes 1012 and the central through hole 1013, closer to the edge of the central through hole 1013. Three rectangular enlarged holes 10131 are also uniformly machined along the circumference on the side wall of the central through hole 1013. The rectangular enlarged holes 10131 are used to avoid interference with the connecting block 2 in the transmission unit.

[0067] like Figure 4, 6 As shown in Figure 12, the support 4 is located below the platform 101 of the base 1 and within the space enclosed by the legs 102 of the base 1, and is positioned and connected by pins 31 and bolts 32. The support 4 is generally annular, with a central through hole serving as a connector mounting hole 405. Its upper surface has two second positioning pin holes 403, three circumferentially distributed third bolt through holes 404, and three circumferentially distributed rectangular slots 401. Each rectangular slot 401 extends radially outward to form a double-ear seat 402. The two second positioning pin holes 403 correspond one-to-one with the two first positioning pin holes 1015 on the base 1, facilitating the positioning and installation of the support 4 on the base 1. This ensures that the three rectangular slots 401 of the support 4 are aligned one-to-one with the three rectangular enlarged holes 10131 on the side wall of the central through hole 1013 of the base 1. The three third bolt through holes 404 correspond one-to-one with the three second bolt through holes 1014 on the base 1. Meanwhile, the three rectangular slots 401 correspond one-to-one with the three radial slots 3022 on the connector 3 in the transmission unit; the round holes 4021 on the three double ear seats 402 correspond one-to-one with the first pin holes 203 in the middle of the three connecting blocks 2 in the transmission unit.

[0068] like Figure 7 As shown, the housing 6 includes a stepped sleeve 601 and an extended disk 602 disposed in the middle of the outer wall of the stepped sleeve 601 with a larger diameter. A positioning shoulder 604 is formed at the stepped surface of the outer wall of the stepped sleeve 601; the inner cavity of the stepped sleeve 601 is also a stepped hole, which is composed of an upper small hole 6011 and a lower large hole 6012 arranged coaxially; the upper small hole 6011 and the lower small hole 6012 are used to install bushings of different sizes respectively; a first pin hole 6013 is radially opened on the side wall of the upper small hole 6011, which passes through the inside and outside of the hole. By inserting a pin into the first pin hole 6013 and pressing it against the bushing located in the upper small hole 6011, the bushing can be detachably installed in the upper small hole 6011. Three threaded holes 6021 and two third locating pin holes 6022 are evenly distributed on the end face of the extended disk 602. The three threaded holes 6021 correspond one-to-one with the three third bolt through holes 404 on the support 4. Since the side wall of the shell part B has an inclined plane, in order to avoid interference between the shell 6 and the shell part B, a plane 603 parallel to its axis is also cut out along the axial direction on the side wall of the extended disk 602 of the shell 6.

[0069] like Figure 2As shown, the positioning unit includes a positioning element 5 and a positioning bushing 10. The positioning element 5 is disposed between the housing 6 and the base 1, and extends radially beyond the edge of the housing 6. The sidewall of the positioning element 5 is adapted to the lower inner sidewall of the shell-shaped part B, and is used to position and support the lower inner sidewall of the shell-shaped part B. The positioning bushing 10 is generally hollow cylindrical, and its upper sidewall is provided with a positioning boss 1001 extending radially outward. The positioning boss 1001 is used to support and position the lower end of the central through hole at the top of the shell-shaped part A.

[0070] The first anti-rotation unit is used to prevent the shell-shaped part A from rotating. For example... Figure 8 As shown, the first anti-rotation unit includes a head positioning component 9, which is an annular part. A screw hole 901 is radially machined in the middle of its side wall. The axis of the screw hole 901 coincides with the diameter of one of the radial sections of the head positioning component 9, and the screw hole 901 matches the pin hole 6013 on the side wall of the upper small hole 6011 of the housing 6 in the support unit. Two sets of boss units are mirror-image arranged on the upper end face of the head positioning component 9. Each set of boss units includes a first boss 902 and a second boss 903. The first boss 902 and the second boss 903 have the same structure, are spaced apart, and are symmetrical about the axis of the screw hole 901. The opposite sides of the first boss 902 and the second boss 903 are not parallel. The distance between the first boss 902 and the second boss 903 gradually changes from a large size to a small size from the edge of the head positioning component 9 towards the center, thus forming a trapezoidal groove that is smaller on the outside and larger on the inside. The trapezoidal groove formed between the first boss 902 and the second boss 903 matches the two protrusions on the inner cavity of the shell part A. When the shell part A is placed in the quick positioning and clamping device of the present invention in the correct assembly position, the two protrusions on the inner cavity of the shell part A will be inserted into the two trapezoidal grooves formed by the first boss 902 and the second boss 903, thereby preventing the shell part A from rotating.

[0071] During assembly, the head positioning component 9 is fitted onto the upper small hole 6011 of the housing 6 and axially limited by the positioning shoulder 604 of the housing 6. The positioning bushing 10 is inserted into the upper small hole 6011 of the housing 6. Then, the threaded cylindrical pin 24 is screwed into the pin hole 6013 on the side wall of the housing 6 and the screw hole 901 on the side wall of the head positioning component 9, so that the head positioning component 9, the positioning bushing 10 and the housing 6 can be fixedly connected.

[0072] The second anti-rotation unit is used to prevent the shell-shaped part B from rotating. For example... Figure 2 , 3As shown in Figure 12, the second anti-rotation unit is disposed on the platform 101 of the base 1. The specific position of the second anti-rotation unit on the platform 101 is determined according to the allowable error of the relative position of the shell parts A and B along the circumferential direction. The second anti-rotation unit includes a bracket 16, a rod 14, a cover plate 13, a slider 15, a knurled head hand screw 17, and a second screw 28. The lower part of the bracket 16 is fixedly installed on the platform 101 of the base 1 in the support unit and is positioned and connected by a fifth cylindrical pin 29 and a third screw 30. The upper part of the bracket 16 has a U-shaped support frame 1601. One end of the rod 14 is used to insert into the bushing hole on the shell part B to achieve the anti-rotation function. The middle part of the rod 14 is placed inside the U-shaped support frame 1601 on the upper part of the bracket 16 and is limited by the cover plate 13 installed at the upper opening of the U-shaped support frame 1601 to prevent it from falling out of the U-shaped support frame 1601. The other end of the rod 14 is located outside the U-shaped support frame 1601 for easy hand operation. The cover plate 13 is fixedly installed at the upper opening of the U-shaped support frame 1601 by the second screw 28. The slider 15 is fitted outside the rod 14 and located inside the U-shaped support frame 1601. It is used to limit the position of the rod 14 in the circumferential direction of the shell part B and improve the anti-rotation positioning accuracy of the shell part B. The through hole on the slider 15 is used to provide guidance for the rod 14. The slider 15 can also be finely adjusted along the direction from the opening of the U-shaped support frame 1601 to the bottom, so as to adapt to the positional error of the bushing hole welded on the shell part B. The knurled head hand screw 17 is installed on the side wall of the U-shaped support frame 1601 and passes through the slider 15 before being inserted into the U-shaped groove on the side wall of the rod 14. On the one hand, it ensures that the rod 14 can move flexibly in the axial direction, and on the other hand, it prevents the rod 14 from being pulled directly out of the U-shaped support frame 1601.

[0073] like Figure 2 As shown, the transmission unit includes a knurled nut 12, a connecting bolt 11, a connecting piece 3, a connecting block 2, and a hinge bolt 21 connected sequentially along the power transmission direction. The knurled nut 12 is located on the upper part of the connecting bolt 11 and is threadedly connected to it. Rotating the knurled nut 12 can drive the connecting bolt 11 to move up and down. The lower part of the connecting bolt 11 is fixedly connected to the upper part of the connecting piece 3. The lower part of the connecting piece 3 is simultaneously hinged to one end of three circumferentially distributed connecting blocks 2. The other ends of the three connecting blocks 2 are respectively hinged to the head rings of the three hinge bolts 21. When the knurled nut 12 is tightened, its rotational motion is converted into the axial up and down motion of the connecting bolt 11. Thus, the connecting bolt 11 drives the connecting piece 3 to move up and down axially. In turn, the connecting piece 3 synchronously drives one end of each of the three connecting blocks 2 to rotate around the hinge point with the connecting piece 3. Finally, the three connecting blocks 2 synchronously drive the three hinge bolts 21 to move.

[0074] like Figure 9As shown, the connector 3 includes a connecting sleeve 301 and a connecting base 302. The outer wall of the connecting sleeve 301 is adapted to the large lower hole 6012 of the housing 6 in the support unit, and the outer wall of the connecting base 302 is adapted to the inner wall of the connector mounting hole 405 on the support 4 in the support unit. The connecting sleeve 301 is vertically arranged in the middle of the upper end face of the connecting base 302. The inner wall of the connecting sleeve 301 matches the lower part of the connecting bolt 11, and its side wall has a second pin hole 303. The lower part of the connecting bolt 11 is inserted into the connecting sleeve 301, and the first cylindrical pin 23 is installed in the second pin hole 303 to realize the connection between the connector 3 and the connecting bolt 11. The side wall of the connecting base 302 has a circumferential groove 3021 for installing the cylindrical pin, and three radial grooves 3022 that are perpendicular to the circumferential groove 3021 and match one end of the connecting block 2, and are vertically connected.

[0075] like Figure 10 As shown, one end of the connecting block 2 has a single ear seat 201, the other end has a double ear seat 202, and a third pin hole 203 is provided in the middle; the single ear seat 201 is used to hinge with the lower part of the connecting piece 3, and the double ear seat 202 is used to hinge with the head ring of the hinge bolt 21.

[0076] like Figure 2 , 4 As shown, there are three connecting blocks 2, all of which are hinged to the lower part of the connecting member 3. Specifically, the single ear seat 201 of the connecting block 2 is set in the radial groove 3022 of the connecting block 2. A fourth cylindrical pin 27 is installed in the circumferential groove 3021 and the single ear seat 201, and the fourth cylindrical pin 27 is interference-fitted with the circumferential groove 3021, so that one end of the connecting block 2 is hinged to the lower part of the connecting member 3.

[0077] like Figure 2 As shown, there are three hinge bolts 21. The screws of the three hinge bolts 21 pass through the screw holes 7012 on the three horizontal plates 701 of the pressure plate 7 and the three first bolt holes 1012 evenly distributed on the platform 101 of the base 1, respectively. The head rings of the three hinge bolts 21 are all located below the platform 101 of the base 1 and are hinged to the double-ear seat 202 of the connecting block 2 by the second cylindrical pin 25. The upper part of the screw of the three hinge bolts 21 extends out of the horizontal plate 701 of the pressure plate 7 and is fastened to prevent loosening by the nut 33 and the washer 20.

[0078] The clamping unit includes three pressure plates 7 evenly distributed along the circumference, a first screw 18, a nut 33, and a groove 1011 provided on the platform 101 of the base 1 in the support unit.

[0079] like Figure 2 , 3As shown in Figure 11, a single pressure plate 7 includes a horizontal plate 701 and a vertical plate 702; the horizontal plate 701 is provided with bolt through holes 7011 and screw through holes 7012; the bolt through holes 7011 are used to install the hinge bolts 21 in the transmission unit. To facilitate installation and adjustment and reduce assembly and processing requirements, the bolt through holes 7011 are U-shaped holes. The upper part of the vertical plate 702 extends outward to form a positioning pressing edge 7021, which is used to press the protruding structure on the outer wall of the shell-shaped part B; the side wall shape of the vertical plate 702 opposite to the shell-shaped part B is adapted to the shape of the shell-shaped part B so as to make close contact with the shell-shaped part B and achieve reliable pressing and positioning.

[0080] like Figure 2 , 12 As shown, the first screw 18 is installed on the horizontal plate 701 of the pressure plate 7, and the nut 33 is installed on the first screw 18. The lower end of the first screw 18 corresponds to the groove 1011. When the pressure plate 7 is pressed down, the first screw 18 first contacts the groove 1011. In this way, when the pressure plate 7 continues to move downward to press the shell-shaped part B, the first screw 18 acts as a lever fulcrum, so that the main force is concentrated at the vertical plate 702 of the pressure plate 7. Furthermore, by adjusting the downward movement height of each first screw 18, it can be ensured that the three pressure plates 7 can simultaneously and reliably press the shell-shaped part B.

[0081] This embodiment may further include a guide unit for guiding some moving parts in the transmission unit, thereby improving their motion accuracy and stability. For example... Figure 2 As shown, the guide unit includes a guide bushing 19. The guide bushing 19 is disposed inside the housing 6 and is interference-fitted with the housing 6. After the guide bushing 19 is installed, the connecting member 3 is located inside the guide bushing 19, and the guide bushing 19 guides the connecting member 3 when it moves up and down, ensuring the movement accuracy and stability of the connecting member 3.

[0082] To enable rapid disassembly after assembly, this embodiment may further include a quick-release unit. For example... Figure 2 As shown, the quick-release unit includes an open washer 22 disposed between the knurled nut 12 and the shell-shaped part A, and a first spring 8 sleeved on the connecting bolt 11 and located between the positioning bushing 10 and the connecting piece 3. After assembly, the knurled nut 12 only needs to be loosened a few turns, the open washer 22 can be removed, and the pressure plate 7 can be quickly released under the elastic force of the first spring 8.

[0083] The quick-release unit may also include a second spring 34 and two washers fitted around each hinge bolt 21. The second spring 34 is located between the pressure plate 7 and the platform 101 of the base 1, and the two washers are located at both ends of the second spring 34 for limiting its movement. When the hinge bolt 21 pulls the pressure plate 7 downward, it compresses the spring 8. When the hinge bolt 21 moves the pressure plate 7 upward, the elastic force of the second spring 34 causes the pressure plate 7 to move upward quickly to disengage the shell-shaped part B, thus achieving quick release.

[0084] The assembly, usage, and quick positioning clamping principle and method of this embodiment are as follows:

[0085] First, insert the guide bushing 19 into the housing 6 (the two are connected by an interference fit). Then, insert the housing 6 with the guide bushing 19 from above the base 1. Insert the support 4 from below the base 1 to its central through hole 1013. Adjust the housing 6 so that the third positioning pin hole 6022 on the housing 6, the first positioning pin hole 1015 on the base 1, and the second positioning pin hole 403 on the support 4 are aligned. Insert the pin 31 into them to achieve positioning of the three. At this time, the threaded hole 6021 on the housing 6, the second bolt through hole 1014 on the base 1, and the third bolt through hole 404 on the support 4 are also aligned. Screw the bolt 32 into the support 4 from below to connect the housing 6 with the guide bushing 19, the base 1, and the support 4.

[0086] The second step is to insert the positioning bushing 10 into the upper small hole 6011 of the housing 6 from above (the upper part of the positioning bushing 10 extends out of the housing 6), put the head positioning member 9 on the upper part of the housing 6 and position it axially through the positioning shoulder 604, adjust the position of the head positioning member 9 so that the screw hole 901 on its side wall is aligned with the pin hole 6013 on the upper side wall of the housing 6, insert the threaded cylindrical pin 24 into the pin hole 6013 and the screw hole 901 and tighten the positioning bushing 10, connecting the positioning bushing 10, the housing 6 and the head positioning member 9.

[0087] The third step is to insert the lower part of the connecting bolt 11 into the connecting sleeve 301 of the connector 3, and insert the first cylindrical pin 23 into the pin hole 303, thereby fixing the connecting bolt 11 and the connector 3 together; then, insert the connecting bolt 11 from below, so that its upper part passes through the support 4, the base 1, the housing 6 and the head positioning member 9 in sequence.

[0088] Fourth step, insert the connecting base 302 of the connector 3 into the connector mounting hole 405 in the middle of the support 4 (the two are clearance fit, and the connecting base 302 can move axially in the connector mounting hole 405). Place the single ear seat 201 of the connecting block 2 in the radial groove 3022 of the connector 3. The part between the single ear seat 201 and the middle of the connecting block 2 is placed in the double ear seat 402 and the rectangular groove 401 of the support 4. Insert the third cylindrical pin 26 into the round hole 4021 on the double ear seat 402 and the first pin hole 203 in the middle of the connecting block 2 to connect the double ear seat 402 and the connecting block 2, and make the third cylindrical pin 26 serve as the rotation shaft for the connecting block 2 to rotate.

[0089] Fifth step: The double-eared seats 202 of the three connecting blocks 2 are hinged to the head rings 2101 of the three hinge bolts 21 respectively by the second cylindrical pin 25.

[0090] Step 6: Place shell-shaped part A on the fixture, guide and position it through the top center through-hole using the positioning bushing 10, and prevent rotation of shell-shaped part A using the head positioning component 9; then press... Figure 2 As shown, shell-shaped part B is placed on top of shell-shaped part A (the notch of shell-shaped part B is aligned with the notch of shell-shaped part A), and the lower inner wall of shell-shaped part B is positioned by a positioning piece 5; then, one end of push rod 14 is inserted into bushing hole D on shell-shaped part B (the bushing hole D is welded to the inclined plane of the notch of shell-shaped part B before assembly) to prevent rotation of shell-shaped part B.

[0091] Step 7: Insert the three first screws 18 into the three screw holes 7012 on the pressure plate 7 and tighten them with nuts 33. Then, pass the screws of the three hinge bolts 21, each equipped with a washer and a spring 8, through the three first bolt holes 1012 evenly distributed on the base 1 and the three bolt holes 701 on the pressure plate 7, and tighten them with nuts 33 and washers 22 to prevent loosening.

[0092] Step 8: Connect the knurled nut 12 to the upper thread of the connecting bolt 11 and rotate the knurled nut 12. This will cause the connecting piece 3 to move upward in the guide bushing 19, the three connecting blocks 2 to rotate counterclockwise synchronously, the three hinge bolts 21 to move downward synchronously, and the three pressure plates 7 to move downward synchronously. This will cause the upper part of the shell-shaped part B to be pressed down synchronously by the three pressure plates 7. At the same time, the lower inner wall of the shell-shaped part B is also centered and positioned by a positioning piece 5. This will enable the shell-shaped part B to be quickly positioned and pressed against the shell-shaped part A, thus achieving the rapid positioning and clamping of the shell-shaped part B and the shell-shaped part A.

[0093] Step 8: After the riveting holes are machined on shell-shaped parts B and A and rivets are installed for riveting assembly, rotate the knurled nut 12 in the reverse direction to make the threaded connecting bolt 11 move downward. This will cause the connecting piece 3 to move downward in the guide bushing 19 in sequence, the three connecting blocks 2 to rotate clockwise synchronously, the three hinge bolts 21 to move upward synchronously, and the three pressure plates 7 to move upward synchronously to disengage from shell-shaped parts B. Then, rotate the pressure plate 7 around the hinge bolt 21 to make room, and the assembled product can be removed.

[0094] Repeat the above quick positioning and clamping process to proceed with the assembly of the next set of products.

Claims

1. A quick positioning and clamping device, characterized in that: For quickly positioning and clamping shell-shaped parts A and B that constitute the flame tube product assembly; the quick positioning and clamping device includes The support unit is used to carry and support the positioning unit, transmission unit, clamping unit, first anti-rotation unit, and second anti-rotation unit; The positioning unit is used to position and support shell-shaped part A and shell-shaped part B. The transmission unit is used to transmit power to the clamping unit, which drives the clamping unit to press down and detach from the shell-shaped part B; The clamping unit is used to press the shell-shaped part B downward during assembly and works together with the positioning unit to clamp the shell-shaped part B and the shell-shaped part A; the clamping unit can also disengage from the shell-shaped part B to remove the part after assembly. The first anti-rotation unit is used to engage with the protrusion on the inner cavity of the shell-shaped part A to prevent the shell-shaped part A from rotating. The second anti-rotation unit is used to cooperate with the bushing on the shell part B to prevent the shell part B from rotating. The first and second anti-rotation units work together to ensure that the relative positions of the shell part A and the shell part B in the circumferential direction are within the allowable range of assembly error. The transmission unit includes a knurled nut, a connecting bolt, a connector, a connecting block, and a hinge bolt connected sequentially along the power transmission direction; there are three connecting blocks, one end of which is hinged to the lower part of the connector, and the three connecting blocks are evenly distributed along the circumference; there are three hinge bolts, the head ring of which is hinged to the other end of the connecting block, and the screw is connected to the clamping unit. When the knurled nut rotates, it can drive the connecting bolt and the connecting piece to move up and down. The up and down movement of the connecting piece can synchronously drive the three connecting blocks to rotate synchronously, and then synchronously drive the three hinge bolts to rotate synchronously. The three hinge bolts synchronously pull the clamping unit to press the shell-shaped part B downward. The support unit includes a support, a base, and a housing arranged coaxially from bottom to top; The base includes a platform and legs. The platform has three first bolt holes evenly distributed around the circumference for the hinge bolts to pass through. The center of the platform has a central through hole for accommodating the connector and the lower part of the housing. Three rectangular enlarged holes are also evenly machined around the circumference on the side wall of the central through hole in the radial direction. The support is fixedly installed below the platform of the base and within the space enclosed by the legs of the base. The support is generally annular, with a central through hole for accommodating the connector. Three rectangular slots are evenly distributed along the circumference on its upper surface. Each rectangular slot extends radially outward to form a double-ear seat. The three rectangular slots are respectively aligned with the three rectangular enlarged holes on the base. The three double-ear seats are respectively hinged to the middle of the three connecting blocks in the transmission unit, and the junction forms the rotation shaft of the connecting block. The housing includes a stepped sleeve and an extended disc disposed in the lower part of the outer wall of the stepped sleeve; a positioning shoulder is formed at the stepped surface of the outer wall of the stepped sleeve; the inner cavity of the stepped sleeve is also a stepped hole, with an upper small hole and a lower small hole for installing positioning bushings and guide bushings of different sizes, respectively; a first pin hole is radially formed on the side wall of the upper small hole, which passes through the inside and outside of the hole. By inserting a pin into the first pin hole and pressing it against the positioning bushing located in the upper small hole, the positioning bushing can be detachably installed in the upper small hole; a connecting piece is located inside the guide bushing; the extended disc is fixedly connected to the base and the support; The positioning unit includes a positioning component and a positioning bushing; A positioning element is disposed between the housing and the base, and the positioning element extends radially out of the edge of the housing; the positioning element is used to position and support the lower inner wall of the shell-shaped part B. The positioning bushing is in the shape of a hollow cylinder, and its upper side wall is provided with a positioning boss that extends radially outward. This positioning boss is used to support and position the lower end of the central through hole at the top of the shell-shaped part A.

2. The quick positioning and clamping device according to claim 1, characterized in that: It also includes a quick-release unit for quickly disengaging the clamping unit from the shell-shaped part B after assembly.

3. The quick positioning and clamping device according to claim 2, characterized in that: The clamping unit includes three pressure plates evenly distributed along the circumference, screws, nuts, and grooves on the base platform. Each pressure plate includes a horizontal plate and a vertical plate. The horizontal plate has bolt holes and screw holes. The bolt holes are used to install the hinge bolts in the transmission unit. The upper part of the vertical plate extends outward to form a positioning pressing edge for clamping the protruding structure on the outer wall of the shell-shaped part B. The side wall shape of the vertical plate opposite to the shell-shaped part B is adapted to the shape of the shell-shaped part B to ensure close contact. The screws are installed on the horizontal plate of the pressure plate, and the nuts are installed on the screws. The lower end of the screws corresponds to the grooves on the platform. When the pressure plate is pressed down, the screws first contact the grooves to form a fulcrum, so that the force is mainly concentrated on the vertical plate of the pressure plate. By adjusting the downward movement height of each screw, it can be ensured that each pressure plate simultaneously and reliably clamps the shell-shaped part B.

4. The quick positioning and clamping device according to claim 3, characterized in that: The bolt through-hole is a U-shaped hole.

5. The quick positioning and clamping device according to claim 4, characterized in that: The first anti-rotation unit includes a head positioning component disposed at the positioning shoulder on the upper part of the housing; the head positioning component is an annular part with two sets of boss units on its upper end face, each set of boss units including a first boss and a second boss disposed at intervals, and a trapezoidal groove formed between the first boss and the second boss that respectively matches two protrusions on the inner cavity of the shell-shaped part A; when the shell-shaped part A is correctly placed on the head positioning component, the two protrusions on the inner cavity of the shell-shaped part A are respectively inserted into the two trapezoidal grooves, thereby achieving the positioning and anti-rotation of the shell-shaped part A; The second anti-rotation unit is disposed on the platform of the base, and its specific position is determined according to the allowable error of the relative position of shell parts A and B along the circumferential direction. The second anti-rotation unit includes a bracket, a rod, a cover plate, a slider, and a hand-turning screw. The lower part of the bracket is fixedly installed on the platform of the base in the support unit. The upper part of the bracket has a U-shaped support frame. One end of the rod is used to insert into the bushing hole on the shell part B to achieve anti-rotation, and the middle part of the rod is placed inside the U-shaped support frame. The cover plate is installed at the upper opening of the U-shaped support frame to prevent the rod from coming out. The slider is fitted outside the rod and also located inside the U-shaped support frame. It is used to limit the position of the rod in the circumferential direction of the shell-shaped part B, thereby improving the anti-rotation positioning accuracy of the shell-shaped part B. The slider can also be finely adjusted along the direction from the opening of the U-shaped support frame to the bottom, so as to adapt to the positional error of the bushing hole welded on the shell-shaped part B. The hand screw is installed on the side wall of the U-shaped support frame and is used to pass through the slider and insert into the U-shaped hole on the side wall of the rod, so as to ensure that the rod can move flexibly in the axial direction and prevent it from being pulled out of the U-shaped support frame.

6. The quick positioning and clamping device according to claim 5, characterized in that: The quick-release unit also includes an open washer disposed between the knurled nut and the shell-shaped part A, a first spring sleeved outside the connecting bolt and located between the positioning bushing and the connector, and a second spring and two washers sleeved outside each of the hinge bolts. The second spring is located between the pressure plate and the base surface, and the two washers are located at the two ends of the second spring for limiting its movement.

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