Positioning tool for welding head tube assembly of electric vehicle

Abstract

The invention relates to a positioning tool for welding a head tube assembly of an electric vehicle, which comprises a positioning tool for first-order welding, a positioning tool for second-order welding and a positioning tool for third-order welding, the positioning tool for first-order welding is located at a first station, the positioning tool for second-order welding is located at a second station, and the positioning tool for third-order welding is located at a third station. In a circular or fan-shaped area, the first station, the second station and the third station are connected in sequence, and every two adjacent stations are separated by a partition plate. By means of the multi-station design, all parts on the head pipe assembly can be positioned in batches so as to be rapidly welded, and therefore the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to a rapid welding technology for electric vehicle frame parts, and in particular to a tool for rapidly welding a head pipe, a main beam pipe and various accessory brackets of a frame. Background Art

[0002] The head tube assembly on the electric vehicle frame, such as Figure 1-2 As shown, it includes a head pipe and a main beam pipe. A headlight bracket and a steering limit bracket are welded to the head pipe. The headlight bracket and the steering limit bracket are respectively located on both sides and both ends of the head pipe. The main beam pipe is welded to the head pipe, and a basket mounting bracket, a DC bracket, an ECU mounting bracket, a child seat mounting bracket, and a horn bracket are welded to the main beam pipe. The mounting bracket, DC bracket, ECU mounting bracket, child seat mounting bracket, and horn bracket are also distributed on different sides of the main beam pipe.

[0003] Conventional welding methods rely on manual welding, one component at a time. For example, the headlight bracket is first welded to the head tube, followed by the steering limit bracket. This process requires manual positioning of the headlight bracket, followed by a second manual positioning of the steering limit bracket and the head tube to complete the welding. The head tube also needs to be welded to the main beam, which in turn needs to be welded to the basket mounting bracket, DC bracket, ECU mounting bracket, child seat mounting bracket, and speaker bracket. The numerous welding locations make positioning work tedious, repetitive, and inefficient. How to position the various components of the head tube assembly for rapid welding has become an urgent problem to be solved. Based on this, the present invention was designed. Summary of the Invention

[0004] The present invention provides a positioning tool for welding a head pipe assembly. Through a multi-station design, various components on the head pipe assembly can be positioned in batches to facilitate rapid welding, thereby improving work efficiency.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a positioning tool for welding a head pipe assembly, comprising a positioning tool for first-sequence welding, a positioning tool for second-sequence welding, and a positioning tool for third-sequence welding. The positioning tool for first-sequence welding is located at the first workstation, the positioning tool for second-sequence welding is located at the second workstation, and the positioning tool for third-sequence welding is located at the third workstation. In a circular or fan-shaped area, the first workstation, the second workstation, and the third workstation are connected in sequence, and adjacent workstations are separated by partitions.

[0006] On the basis of the above solution, as a preferred embodiment, a first-order welding positioning tool is used to weld and fix the headlight bracket, the steering limit bracket and the head pipe.

[0007] It includes a first bottom plate, which is vertically installed, and the bottom of the first bottom plate is fixed on the first work surface.

[0008] The first cylinder is fixedly mounted on the upper end of the first base plate, the first limiting column is fixedly mounted on the piston rod of the first cylinder, the first bracket is fixedly mounted on the lower end of the first base plate, the second limiting column and a positioning mechanism for positioning the steering limiting bracket are fixedly mounted on the first bracket, the axis of the second limiting column coincides with the axis of the first limiting column and they are symmetrically arranged.

[0009] The headlamp bracket seat for positioning the headlamp bracket is located directly below the axis of the first limiting column.

[0010] On the basis of the above solution, as a preferred embodiment, the upper end of the first base plate is fixedly mounted on the first cylinder seat, the cylinder body of the first cylinder is fixedly mounted on the first cylinder seat, the piston rod of the first cylinder is fixedly connected to the first connecting plate, and the lower end surface of the first connecting plate is fixedly mounted on the first limiting column.

[0011] The top end face of the first bracket is fixedly mounted on the first support plate, and the lower end face is fixedly mounted on the second cylinder seat. The upper end face of the first support plate is fixedly mounted on the second limiting column, and the second cylinder seat includes a first horizontal plate fixedly connected to the first bracket and a first vertical plate fixed to the end portion of the first horizontal plate. The lower end of the first vertical plate is fixed with the second horizontal plate, and the end of the second horizontal plate is hinged to the cylinder body of the second cylinder. The piston rod of the second cylinder is hinged to the first connecting piece, and the first connecting piece is provided with a first mounting hole and a second mounting hole. With the upper end face of the first connecting piece as a horizontal plane as a reference, the first mounting hole is located on the left side of the second mounting hole and below the second mounting hole. The projections of the first mounting hole and the second mounting hole in the horizontal direction and the vertical direction have no intersection. The second cylinder seat The piston rod of the cylinder is connected to the first pin installed in the first mounting hole through a Y-type joint, and the upper end of the first vertical plate is hinged to the first connecting piece by a second pin installed in the second mounting hole through a clearance fit, and the upper end of the first vertical plate has a groove, the left end of the first support plate is fixedly connected to the first bracket, and the right end of the first support plate is fixedly connected to the second support plate, and the upper end surface of the second support plate protrudes with a magnetic head. The first limit seat is fixedly installed on one side of the headlamp limit seat, and the second limit seat is fixedly installed on the other side. The first limit seat is higher than the headlamp bracket seat, and a magnetic head is embedded in the upper end surface of the headlamp bracket seat. A clamping block is provided on the upper end surface of the second limit seat, which is fixedly connected to the telescopic rod of the third cylinder, and the cylinder body of the third cylinder is fixed on the first base plate.

[0012] On the basis of the above scheme, preferably, the first limiting column is in the shape of a stepped shaft, specifically including a first diameter section and a second diameter section fixedly connected to the upper end of the first diameter section, the diameter of the first diameter section is larger than the diameter of the second diameter section, and the upper end of the first diameter section is fixedly connected to the lower end face of the first connecting plate.

[0013] On the basis of the above scheme, as a preferred embodiment, the second-sequence welding positioning fixture includes a second base plate, which is fixed on the second workbench, and the second bracket, the third bracket, the fourth bracket, the fifth bracket, the sixth bracket, and the seventh bracket are fixedly installed on the second base plate. The front end surface of the second bracket is fixedly installed with a first support member for supporting the rear section pipe, and the front end of the first support member is a rod member and has a groove that matches the tail end of the rear section pipe.

[0014] The third bracket is located in front of the second bracket. The left side of the second bracket is equipped with a pressing mechanism, and the right side is fixed with a second support member. The upper end surface of the second support member has a groove that matches the shape of the outer wall of the front section tube.

[0015] The clamping mechanism includes a third support plate fixed on the second bracket, a first clamping cylinder is fixedly installed on the third support plate, a second vertical plate is fixedly installed on the right side of the first clamping cylinder, the second vertical plate has the same structure as the first vertical plate, and the second connecting member has the same structure as the first connecting member. The piston rod of the first clamping cylinder is connected to the first pin installed in the first mounting hole of the second connecting member through a Y-type joint, the upper end of the second vertical plate is hinged to the second connecting member by a second pin installed in the second mounting hole through a clearance fit, and the second connecting member is driven by the second clamping cylinder to rotate and clamp the front section pipe placed on the second support member.

[0016] The fourth bracket is located in front of the third bracket and on the right side of the second support member. The pressing mechanism is installed on the right side of the fourth bracket, and the DC bracket seat is fixedly installed on the left side. The DC bracket seat has protrusions at both ends of the upper end surface, and there is a groove for the DC bracket to be inserted on the protrusion. There is a mounting hole on the upper end surface between the two protrusions. The first positioning rod is fixed in the mounting hole. When the DC bracket is placed on the DC bracket seat, the two sides of the DC bracket are inserted into the groove, and the through hole at the center is sleeved on the first positioning rod, and the first positioning rod does not protrude from the through hole. The pressing mechanism presses the DC bracket on the DC bracket seat from the top of the DC bracket.

[0017] The fifth bracket is located in front of the fourth bracket, and the fourth bracket has an inclined surface. The angle between the inclined surface and the horizontal plane is equal to the angle between the head pipe and the front section pipe. The third limiting column is fixedly installed on the inclined surface. The front of the third limiting column is provided with a fourth limiting column. The axis of the fourth limiting column coincides with the axis of the third limiting column and is located in the front and upper part of the third limiting column. The third and fourth limiting columns have the same structure as the first and second limiting columns. The fourth limiting column is fixed to the movable end of the first clamping cylinder. The first clamping cylinder is fixed to the sixth bracket. The third limiting column and the fourth limiting column cooperate to clamp the head pipe.

[0018] On the basis of the above scheme, as a preference, there are two seventh brackets, which are located on both sides of the fifth bracket, and are used to weld the basket mounting bracket to the front section pipe. The basket mounting bracket includes a rod and a mounting piece welded to the rod, and the rod is welded to the front section pipe.

[0019] The second clamping cylinder is fixedly installed on the seventh bracket, and the front end of the telescopic rod of the second clamping cylinder is fixedly installed with a truncated cone-shaped cylinder. A magnetic head is fixed on the front end of the truncated cone-shaped cylinder. When in use, the rod is sleeved on the truncated cone-shaped cylinder and adsorbed by the magnetic head. The second clamping cylinder pushes the rod to the front section of the tube and clamps it. The third clamping cylinder and the mounting part support seat are also fixedly installed on the seventh bracket. When the mounting part is placed on the mounting part support seat, the mounting part contacts the rod part, and the third clamping cylinder drives the first clamping block to press the mounting part down from above the mounting part to clamp the mounting part on the mounting part support seat.

[0020] On the basis of the above solution, preferably, the hole on the mounting piece is a rectangular hole, and the mounting piece support seat has two second positioning rods, which are located at one set of diagonal positions relative to the rectangular hole.

[0021] Based on the above solution, preferably, a base for supporting the ECU mounting bracket is fixedly mounted on the seventh bracket, and a cylinder body of a fourth clamping cylinder for pressing the ECU mounting bracket onto the base is fixed on the eighth bracket.

[0022] On the basis of the above scheme, as a preferred embodiment, the three-sequence welding positioning fixture includes a third base plate and a ninth bracket, a tenth bracket, an eleventh bracket, a twelfth bracket, and a thirteenth bracket fixed to the third base plate. The cooperation between the ninth bracket and the head pipe is the same as the cooperation structure between the fifth bracket and the head pipe, and the cooperation between the tenth bracket and the head pipe is the same as the cooperation structure between the sixth bracket and the head pipe. The cooperation structure between the ninth bracket and the tenth bracket and the head pipe on the third base plate is opposite to the installation direction of the cooperation structure between the fifth bracket and the sixth bracket and the head pipe on the second base plate, so as to meet the requirement that the assembly formed by the head pipe and the main beam tube is flipped 180 degrees relative to the second base plate and then clamped and fixed.

[0023] The eleventh bracket is located behind the fifth bracket. The matching structure between the eleventh bracket and the front section pipe is the same as the matching structure between the third bracket and the front section pipe, and is used to clamp and support the front section pipe.

[0024] The left side of the twelfth bracket is fixedly installed with a clamping mechanism, and the right side of the twelfth bracket is fixedly installed with a speaker bracket support seat. After the speaker bracket is placed on the speaker bracket support seat, the clamping mechanism presses and fixes the speaker bracket on the speaker bracket support seat from above the speaker bracket.

[0025] On the basis of the above scheme, as a preference, the thirteenth bracket is located between the eleventh bracket and the ninth bracket, the cylinder body of the lifting cylinder is fixedly installed on the thirteenth bracket, the piston rod of the lifting cylinder is fixedly connected to the child seat mounting bracket seat, the child seat mounting bracket seat, after the child seat mounting bracket is placed on the child seat mounting bracket seat, the lifting cylinder pushes up so that the child seat mounting bracket contacts the front section tube from the bottom of the front end tube.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] Through the multi-station design, the various components on the head pipe assembly can be positioned in batches for rapid welding, thereby improving work efficiency.

[0028] The positioning tool for first-sequence welding can quickly position the headlight bracket and steering limit bracket with the head pipe for subsequent welding. The positioning tool for second-sequence welding can quickly position the head pipe, main beam tube, basket mounting bracket, ECU mounting bracket, and DC bracket for subsequent welding. The positioning tool for third-sequence welding can quickly position the child seat mounting bracket, speaker bracket, and main beam tube for subsequent welding, realizing batch positioning of multiple components, thereby improving work efficiency.

[0029] The first workstation, the second workstation and the third workstation are connected in sequence, and two adjacent workstations are separated by partitions to form a circular processing line. After the processing is completed at the first workstation, it is directly transferred to the second workstation for processing, and then transferred to the third workstation for processing, forming continuous production, eliminating the intermediate transfer link, improving processing efficiency, and saving space. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional head pipe assembly Figure 1 ;

[0031] Figure 2 It is a three-dimensional head pipe assembly Figure 2 ;

[0032] Figure 3 It is a three-dimensional positioning tool for sequential welding. Figure 1 ;

[0033] Figure 4 is a structural schematic diagram of the steering limit bracket and the second support plate;

[0034] Figure 5 It is a three-dimensional positioning tool for sequential welding. Figure 2 ;

[0035] Figure 6 It is a three-dimensional positioning tool for sequential welding. Figure 3 (Head pipe not installed);

[0036] Figure 7 It is a three-dimensional positioning tool for sequential welding. Figure 4 (Head pipe not installed);

[0037] Figure 8 It is a three-dimensional positioning tool for two-sequence welding Figure 1 ;

[0038] Figure 9 It is a schematic diagram of the structure of the positioning tool for second sequence welding;

[0039] Figure 10 yes Figure 9 sectional view of

[0040] Figure 11 is a schematic structural diagram of a first connecting member;

[0041] Figure 12 This is a structural diagram of the DC bracket seat;

[0042] Figure 13 yes Figure 12 Schematic diagram of cooperation with DC bracket;

[0043] Figure 14 It is a schematic diagram of the cooperation between the mounting support and the mounting piece;

[0044] Figure 15 It is a three-dimensional positioning tool for two-sequence welding Figure 2 (Schematic diagram of the structure after removing the second, third and fourth brackets);

[0045] Figure 16 yes Figure 15 The corresponding main view;

[0046] Figure 17 yes Figure 16 sectional view of

[0047] Figure 18 It is a three-dimensional positioning tool for three-sequence welding Figure 1 ;

[0048] Figure 19 It is a three-dimensional positioning tool for three-sequence welding Figure 2 ;

[0049] Figure 20 This is a schematic diagram of the coordination between the child seat mounting bracket and the child seat mounting bracket;

[0050] Figure 21 It is a system block diagram of the present invention. Specific implementation methods

[0051] The present invention will be further described below with reference to examples, but the scope of the present invention is not limited thereto.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] This program is aimed at Figure 1-2 The tooling for welding the head pipe assembly is shown.

[0054] like Figure 1-21 As shown, the positioning tool for welding the head pipe assembly includes a positioning tool for one-sequence welding, a positioning tool for two-sequence welding, and a positioning tool for three-sequence welding.

[0055] The first-order welding positioning tool is used to position and fix the headlight bracket 1, the steering limit bracket 2 and the head pipe 3 to facilitate subsequent welding.

[0056] It comprises a first bottom plate 4, which is usually installed vertically, that is, the bottom of the first bottom plate is fixed on the first work surface.

[0057] The first cylinder seat 5 is fixedly installed on the upper end of the first base plate, the cylinder body of the first cylinder 6 is fixedly installed on the first cylinder seat, the piston rod of the first cylinder is fixedly connected to the first connecting plate 7, and the lower end surface of the first connecting plate is fixedly installed with the first limiting column 8. The first limiting column is in the shape of a stepped shaft, specifically including a first diameter section and a second diameter section fixedly connected to the upper end of the first diameter section. The diameter of the first diameter section is larger than the diameter of the second diameter section, and the upper end of the first diameter section is fixedly connected to the lower end surface of the first connecting plate.

[0058] The first bracket 9 is fixedly installed on the lower end of the first base plate, the first support plate 10 is fixedly installed on the upper end surface of the first bracket, the second cylinder seat 11 is fixedly installed on the lower end surface, and the second limiting column is fixedly installed on the upper end surface of the first support plate. The axis of the second limiting column coincides with that of the first limiting column and they are symmetrically arranged.

[0059] The second cylinder seat includes a first horizontal plate 12 fixedly connected to the first bracket and a first vertical plate 13 fixed to the end of the first horizontal plate. A second horizontal plate 14 is fixed to the lower end of the first vertical plate. The end of the second horizontal plate is hinged to the cylinder body 15 of the second cylinder. The piston rod of the second cylinder is hinged to the first connecting member 16. The first connecting member has a first mounting hole 17 and a second mounting hole 18. With the upper end surface of the first connecting member as a horizontal plane as a reference, the first mounting hole is located on the left side of the second mounting hole and below the second mounting hole. The projections of the first mounting hole and the second mounting hole in the horizontal direction and the vertical direction have no intersection.

[0060] The piston rod of the second cylinder is connected to the first pin 20 installed in the first mounting hole through a Y-type joint 19. The Y-type joint and the first pin can be fixed or relatively rotated, and the first pin and the second mounting hole are clearance-fitted.

[0061] The upper end of the first vertical plate is hinged to the first connecting member through a second pin shaft 21 installed in the second mounting hole through clearance fit. The upper end of the first vertical plate has a groove, forming the same structure as a Y-type joint.

[0062] The left end of the first support plate is fixedly connected to the first bracket, and the right end of the first support plate is fixedly connected to the second support plate. The upper end surface of the second support plate 64 is protruded with a magnetic head 66 (or positioning column). When the steering limit bracket is placed on the second support plate, the positioning column / magnetic head extends into the hole 87 on the steering limit bracket and does not protrude from the hole.

[0063] The headlamp bracket seat 22 is fixedly mounted on the first base plate and is located directly below the axis of the first limiting column. The first limiting seat 23 is fixedly mounted on one side of the headlamp limiting seat, and the second limiting seat 24 is fixedly mounted on the other side. The first limiting seat is higher than the headlamp bracket seat, and the height of the second limiting seat is usually equivalent to the height of the headlamp bracket seat, and can also be slightly lower or higher than the headlamp bracket seat.

[0064] A clamping block 25 is mounted on the upper end of the second stopper, which is fixedly connected to the telescopic rod of the third cylinder 26. After the headlamp bracket is placed on the headlamp bracket bracket, the third cylinder drives the clamping block to push the headlamp bracket toward the first stopper. The clamping block and the first stopper clamp the headlamp bracket in place. The cylinder body of the third cylinder is fixed to the first base plate. A positioning rod 88 is also fixedly mounted on the front end of the clamping block, which is inserted into a hole in the headlamp bracket for positioning. The first stopper has a positioning hole 89 for the positioning rod, which is aligned horizontally with the positioning rod.

[0065] The upper end surface of the headlamp bracket seat is a sloped surface that matches the angle of the headlamp bracket. When the headlamp bracket is placed on the headlamp bracket seat, the two holes on the headlamp bracket are located on the same horizontal plane. The headlamp bracket is embedded with a weak magnetic head to assist in positioning the headlamp bracket, making it easier to align the holes on the headlamp bracket with the positioning rod.

[0066] The upper end surface of the headlamp bracket seat adopts a sloped surface, a positioning rod is set at the front end of the pressing block, and a positioning hole is set on the first limit seat. Combined with the two holes on the headlamp bracket, the headlamp bracket can be quickly and accurately positioned.

[0067] Among them, the cooperation between the clamping block and the second limit seat is that the clamping block is directly placed on the upper end surface of the second limit seat, and the third cylinder drives the clamping block to operate to form a sliding cooperation, or the clamping block does not contact the second limit seat and is suspended in the air.

[0068] The steering positioning bracket forms a connecting rod mechanism with the second cylinder and the first vertical plate through the two mounting holes on the first connecting member. The steering positioning bracket is pressed and fixed by rotating the first connecting member to improve positioning efficiency.

[0069] During operation, the headlamp bracket is first placed on the headlamp bracket positioning seat and aligned with the positioning rod. The third cylinder drives the pressing block to move toward the first limit seat. The positioning rod passes through the hole and is inserted into the positioning hole. It continues to move forward to push the headlamp bracket to contact the first limit seat, thereby clamping the headlamp bracket with the first limit seat through the pressing block. The lower end of the head pipe is sleeved on the second diameter section of the second limiting column and rests on the step formed by the diameter difference between the second diameter section and the first diameter section. The middle part contacts the headlamp bracket. The first cylinder drives the first limiting column to move downward, so that the upper end of the head pipe is sleeved on the second diameter section of the first limiting column and rests on the step of the first limiting column. The steering limiting bracket is placed on the second support plate and is adsorbed by the magnetic head and contacts the head pipe. The telescopic rod of the second cylinder extends, so that the first connecting piece rotates around the second pin shaft, and the head of the first connecting piece is pressed on the steering limiting bracket.

[0070] By using the above-mentioned tooling, the head pipe, headlight bracket, and steering limit bracket can be positioned at one time, thereby improving the efficiency of the welding work.

[0071] The second-sequence welding positioning fixture is used to position and fix the main beam tube and the head tube for welding, and to position and fix the ECU bracket 30, DC bracket 31 and the main beam tube for welding, and to position and fix the basket mounting bracket and the main beam tube for welding. The angle between the main beam tube and the head tube is an acute angle, greater than 45 degrees, and many of them are located on the front section tube 28 of the main beam tube. In this welding work, no welding requirements are required on the rear section tube 29 of the main beam tube. Therefore, in order to facilitate welding, the main beam tube needs to be kept horizontal. Specifically, the second-sequence welding positioning fixture includes a second base plate 27, and the second base plate is fixed on the second work table or is the second work table itself.

[0072] The second base plate is fixedly mounted with a second bracket 32, a third bracket, a fourth bracket, a fifth bracket, a sixth bracket and a seventh bracket. The front end face of the second bracket is fixedly mounted with a first support member 33 for supporting the rear section pipe. The front end of the first support member is a rod and has a groove that matches the tail end of the rear section pipe, so as to place the rear section pipe at the groove. The first support member and the second bracket are fixedly connected by bolts, so that the first support member can be replaced to adapt to different types of main beam pipes.

[0073] The third bracket 34 is located in front of the second bracket. The left side of the second bracket is equipped with a pressing mechanism, and the right side is fixed with a second support member 35. The upper end surface of the second support member has a groove matching the shape of the outer wall of the front section tube.

[0074] The clamping mechanism includes a third support plate 36 fixed on the second bracket, and a first clamping cylinder 37 is fixedly installed on the third support plate. The axial direction of the first clamping cylinder is the up and down direction. A second vertical plate 38 is fixedly installed on the right side of the first clamping cylinder. The second vertical plate has the same structure as the first vertical plate. The second connecting member 39 has the same structure as the first connecting member but needs to be rotated 180 degrees for installation. The piston rod of the first clamping cylinder is connected to the first pin installed in the first mounting hole of the second connecting member through a Y-type joint. The Y-type joint and the first pin can be fixed or relatively rotated. The first pin and the second mounting hole are clearance fit. The upper end of the second vertical plate is hinged to the second connecting member through the second pin installed in the second mounting hole through a clearance fit. The second connecting member is driven by the second clamping cylinder to rotate and clamp the front section of the pipe placed on the second support member.

[0075] The fourth bracket 40 is located in front of the third bracket and on the right side of the second support member. The clamping mechanism is installed on the right side of the fourth bracket, and the DC bracket seat 41 is fixedly installed on the left side. The DC bracket seat 41 has protrusions 42 at both ends of the upper end surface, and a groove 43 for the DC bracket to be inserted on the protrusion. A mounting hole 61 is provided on the upper end surface between the two protrusions, and a first positioning rod 62 is fixed in the mounting hole. When the DC bracket is placed on the DC bracket seat, the two sides of the DC bracket are inserted into the groove, and the through hole 63 at the center is sleeved on the first positioning rod, and the first positioning rod does not protrude from the through hole. The clamping mechanism presses the DC bracket on the DC bracket seat from the top of the DC bracket.

[0076] The fifth bracket 44 is located in front of the fourth bracket. Since the front section of the main beam tube needs to be kept horizontal, the head tube is tilted at this time. To facilitate the fixing of the head tube, the fourth bracket has an inclined surface 45. The angle between the inclined surface and the horizontal plane is equal to the angle between the head tube and the front section tube. A third limiting post 46 is fixedly installed on the inclined surface. A fourth limiting post 47 is provided in front of the third limiting post. The axis of the fourth limiting post coincides with the axis of the third limiting post and is located in front and above the third limiting post. The third and fourth limiting posts have the same structure as the first and second limiting posts. The fourth limiting post is fixed to the movable end of the first clamping cylinder 48, which is usually the end of the piston rod. The first clamping cylinder is fixed to the sixth bracket 49. The third limiting post and the fourth limiting post cooperate to clamp the head tube. After the head tube is clamped, the main beam tube is inserted. The front end of the front section tube contacts the head tube, the rear end of the rear section tube is placed on the groove, and the bottom of the front section tube contacts the steering limiting bracket. The clamping mechanism presses the front section tube to complete the positioning of the main body.

[0077] There are two seventh brackets 50, located on both sides of the fifth bracket, used to weld the basket mounting bracket to the front section pipe. The basket mounting bracket includes a rod 51 and a mounting member 52 welded to the rod. The rod is welded to the front section pipe.

[0078] A second clamping cylinder 53 is fixedly mounted on the seventh bracket. The front end of the second clamping cylinder's telescopic rod is fixedly mounted on a truncated cone-shaped cylinder. A magnetic head is attached to the front end of the truncated cone-shaped cylinder. During use, the rod is inserted into the truncated cone-shaped cylinder and held in place by the magnetic head (which can also be omitted). The second clamping cylinder pushes the rod toward the front section of the pipe and clamps it. The axial direction of the second clamping cylinder is left-right. Also fixedly mounted on the seventh bracket are a third clamping cylinder 54 and a mounting support 55. When the mounting member is placed on the mounting support, the mounting member contacts the rod. The third clamping cylinder drives the first clamping block 56 to press down on the mounting member from above, clamping it to the mounting support.

[0079] Since the hole on the mounting piece is a rectangular hole, the mounting piece support seat 55 has two second positioning rods 65 . The two second positioning rods are located at one set of diagonal positions relative to the rectangular hole.

[0080] A base 57 for supporting the ECU mounting bracket is also fixedly mounted on the seventh bracket. Since the ECU mounting bracket is close to the basket mounting bracket, using multiple brackets to separately install the ECU mounting bracket and the basket mounting bracket will complicate the installation. By making the seventh bracket larger, the supporting parts of the ECU mounting bracket and the basket mounting bracket can be installed at the same time, that is, the base and the mounting support seat are both fixed on the seventh bracket.

[0081] The cylinder body of the fourth clamping cylinder 59 used to press the ECU mounting bracket onto the base can be fixed on the seventh bracket, and can also be fixed on the eighth bracket 60. When in use, after the ECU mounting bracket is placed on the base, the fourth clamping cylinder drives the second clamping block 58 to press the ECU mounting bracket down from the top of the ECU mounting bracket to clamp the ECU mounting bracket on the base. The way the ECU mounting bracket is placed on the base is similar to that of the DC bracket.

[0082] The positioning fixture for three-sequence welding is used after the welding work of the positioning fixture for two-sequence welding is completed. It is used to position and fix the steering limit bracket, child seat mounting bracket, horn bracket and main beam tube for welding. It includes a third bottom plate 67 and a ninth bracket 68, a tenth bracket 69, an eleventh bracket 70, a twelfth bracket 71 and a thirteenth bracket 72 fixed on the third bottom plate. The cooperation between the ninth bracket and the head pipe is the same as the cooperation structure between the fifth bracket and the head pipe, and the cooperation between the tenth bracket and the head pipe is the same as the cooperation structure between the sixth bracket and the head pipe. The cooperation structure between the ninth bracket and the tenth bracket and the head pipe on the third bottom plate is opposite to the installation direction of the cooperation structure between the fifth bracket and the sixth bracket and the head pipe on the second bottom plate, so as to meet the requirement that the assembly formed by the head pipe and the main beam tube is flipped 180 degrees relative to it on the second bottom plate and then clamped and fixed.

[0083] The eleventh bracket is located behind the fifth bracket. The matching structure between the eleventh bracket and the front section pipe is the same as the matching structure between the third bracket and the front section pipe, and is used to clamp and support the front section pipe.

[0084] After the front section pipe is clamped and supported by the eleventh bracket and the head pipe is clamped and fixed by the ninth and tenth brackets, the front section pipe is in a horizontal state, the twelfth bracket is located on the left side of the vertical plane where the axis of the front section pipe is located, the left side of the twelfth bracket is fixedly installed with a clamping mechanism, and the right side of the twelfth bracket is fixedly installed with a speaker bracket support seat 73. After the speaker bracket 74 is placed on the speaker bracket support seat, the clamping mechanism presses and fixes the speaker bracket on the speaker bracket support seat from above the speaker bracket.

[0085] The thirteenth bracket 72 is located between the eleventh bracket and the ninth bracket, and the cylinder body 75 of the lifting cylinder is fixedly installed on the thirteenth bracket. The piston rod of the lifting cylinder is fixedly connected to the child seat mounting bracket seat 76 and the child seat mounting bracket seat. After the child seat mounting bracket 77 is placed on the child seat mounting bracket seat, the lifting cylinder pushes up so that the child seat mounting bracket contacts the front section pipe from the bottom of the front end pipe.

[0086] Among them, since the child seat mounting bracket is U-shaped and has a through hole at the bottom, in order to facilitate the fixing of the child seat mounting bracket on the child seat mounting bracket seat, the following design is made: the child seat mounting bracket seat includes a first support 78, a left limit seat 79, a right limit seat 80, and a middle base 81. The left limit seat and the right limit seat are respectively fixed to the left and right ends of the upper end face of the first support. The middle base is fixed to the upper end face of the first support and is located in the middle between the left limit seat and the right limit seat. The interval between the left limit seat and the right limit seat is slightly larger than the left and right width of the child seat mounting bracket. A limit rod 82 for the child seat mounting bracket to be sleeved thereon is fixedly installed on the upper end face of the middle base. The limit rod, the left limit seat, and the right limit seat cooperate to quickly place the child seat mounting bracket on the child seat mounting bracket seat.

[0087] In this solution, the positioning tool for first-sequence welding is located at the first workstation 83, the positioning tool for second-sequence welding is located at the second workstation 84, and the positioning tool for third-sequence welding is located at the third workstation 85. In a circular or fan-shaped area, the first workstation, the second workstation, and the third workstation are connected in sequence, and the adjacent workstations are separated by a partition 86 to form a circular processing line. After the processing is completed at the first workstation, it is directly transferred to the second workstation for processing, and then transferred to the third workstation for processing, forming continuous production, eliminating the intermediate transfer link, improving processing efficiency, and saving space.

[0088] It should be noted that the embodiments described above are only used to explain the present invention and do not constitute any limitation to the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The present invention may be modified as specified within the scope of the claims of the present invention, and the present invention may be revised without departing from the scope and spirit of the present invention. Although the present invention described therein relates to specific methods, materials and embodiments, it is not intended that the present invention is limited to the specific examples disclosed therein. On the contrary, the present invention can be extended to all other methods and applications having the same function.

Claims

1. A positioning tool for welding an electric vehicle head tube assembly, comprising a positioning tool for first-sequence welding, a positioning tool for second-sequence welding, and a positioning tool for third-sequence welding. The positioning tool for first-sequence welding is located at a first workstation, the positioning tool for second-sequence welding is located at a second workstation, and the positioning tool for third-sequence welding is located at a third workstation. Within a circular or fan-shaped area, the first workstation, the second workstation, and the third workstation are sequentially connected, and adjacent workstations are separated by partitions.

2. The electric vehicle head tube assembly welding positioning tool as claimed in claim 1, characterized in that: The first-order welding positioning tool is used to weld and fix the headlight bracket, steering limit bracket and head pipe. It includes a first bottom plate, which is vertically installed, and the bottom of the first bottom plate is fixed on the first work surface. The first cylinder is fixedly mounted on the upper end of the first base plate, the first limiting column is fixedly mounted on the piston rod of the first cylinder, the first bracket is fixedly mounted on the lower end of the first base plate, the second limiting column and a positioning mechanism for positioning the steering limiting bracket are fixedly mounted on the first bracket, the axis of the second limiting column coincides with the axis of the first limiting column and they are symmetrically arranged. The headlamp bracket seat for positioning the headlamp bracket is located directly below the axis of the first limiting column.

3. The electric vehicle head tube assembly welding positioning tool as claimed in claim 2, characterized in that: The upper end of the first base plate is fixedly mounted with the first cylinder seat, the cylinder body of the first cylinder is fixedly mounted on the first cylinder seat, the piston rod of the first cylinder is fixedly connected to the first connecting plate, and the lower end surface of the first connecting plate is fixedly mounted with the first limiting column. The first support plate is fixedly installed on the upper end surface of the first bracket, and the second cylinder seat is fixedly installed on the lower end surface. The second limiting column is fixedly installed on the upper end surface of the first support plate. The second cylinder seat includes a first horizontal plate fixedly connected to the first bracket and a first vertical plate fixed to the end of the first horizontal plate. The second horizontal plate is fixed to the lower end of the first vertical plate. The end of the second horizontal plate is hinged to the cylinder body of the second cylinder. The piston rod of the second cylinder is hinged to the first connecting member. The first connecting member is provided with a first mounting hole and a second mounting hole. With the upper end surface of the first connecting member as a horizontal plane as a reference, the first mounting hole is located on the left side of the second mounting hole and below the second mounting hole. The projections of the first mounting hole and the second mounting hole in the horizontal and vertical directions are There is no intersection between them, the piston rod of the second cylinder is connected to the first pin shaft installed in the first mounting hole through a Y-type joint, the upper end of the first vertical plate is hinged to the second pin shaft installed in the second mounting hole through clearance fit, the upper end of the first vertical plate has a groove, the left end of the first support plate is fixedly connected to the first bracket, the right end of the first support plate is fixedly connected to the second support plate, and the upper end surface of the second support plate protrudes with a magnetic head, the first limit seat is fixedly installed on one side of the headlamp limit seat, and the second limit seat is fixedly installed on the other side, the first limit seat is higher than the headlamp bracket seat, and the upper end surface of the second limit seat is provided with a clamping block, which is fixedly connected to the telescopic rod of the third cylinder, and the cylinder body of the third cylinder is fixed on the first base plate.

4. The positioning tool for welding the electric vehicle head tube assembly according to claim 3, characterized in that: The first limiting column is in the shape of a stepped shaft, specifically including a first diameter section and a second diameter section fixedly connected to the upper end of the first diameter section. The diameter of the first diameter section is larger than the diameter of the second diameter section, and the upper end of the first diameter section is fixedly connected to the lower end surface of the first connecting plate.

5. The positioning tool for welding the electric vehicle head tube assembly according to claim 1, characterized in that: The second-order welding positioning fixture includes a second base plate, which is fixed on the second workbench. The second base plate is fixedly mounted with a second bracket, a third bracket, a fourth bracket, a fifth bracket, a sixth bracket, and a seventh bracket. The front end of the second bracket is fixedly mounted with a first support member for supporting the rear section pipe. The front end of the first support member is a rod member and has a groove that matches the tail end of the rear section pipe. The third bracket is located in front of the second bracket. The left side of the second bracket is equipped with a pressing mechanism, and the right side is fixed with a second support member. The upper end surface of the second support member has a groove that matches the shape of the outer wall of the front section tube. The clamping mechanism includes a third support plate fixed on the second bracket, a first clamping cylinder is fixedly installed on the third support plate, a second vertical plate is fixedly installed on the right side of the first clamping cylinder, the second vertical plate has the same structure as the first vertical plate, and the second connecting member has the same structure as the first connecting member. The piston rod of the first clamping cylinder is connected to the first pin installed in the first mounting hole of the second connecting member through a Y-type joint, the upper end of the second vertical plate is hinged to the second connecting member by a second pin installed in the second mounting hole through a clearance fit, and the second connecting member is driven by the second clamping cylinder to rotate and clamp the front section pipe placed on the second support member. The fourth bracket is located in front of the third bracket and on the right side of the second support member. The pressing mechanism is installed on the right side of the fourth bracket, and the DC bracket seat is fixedly installed on the left side. The DC bracket seat has protrusions at both ends of the upper end surface, and there is a groove for the DC bracket to be inserted on the protrusion. There is a mounting hole on the upper end surface between the two protrusions. The first positioning rod is fixed in the mounting hole. When the DC bracket is placed on the DC bracket seat, the two sides of the DC bracket are inserted into the groove, and the through hole at the center is sleeved on the first positioning rod, and the first positioning rod does not protrude from the through hole. The pressing mechanism presses the DC bracket on the DC bracket seat from the top of the DC bracket. The fifth bracket is located in front of the fourth bracket, and the fourth bracket has an inclined surface. The angle between the inclined surface and the horizontal plane is equal to the angle between the head pipe and the front section pipe. The third limiting column is fixedly installed on the inclined surface. The front of the third limiting column is provided with a fourth limiting column. The axis of the fourth limiting column coincides with the axis of the third limiting column and is located in the front and upper part of the third limiting column. The third and fourth limiting columns have the same structure as the first and second limiting columns. The fourth limiting column is fixed to the movable end of the first clamping cylinder. The first clamping cylinder is fixed to the sixth bracket. The third limiting column and the fourth limiting column cooperate to clamp the head pipe.

6. The positioning tool for welding the electric vehicle head tube assembly according to claim 5, characterized in that: There are two seventh brackets, located on both sides of the fifth bracket, used to weld the basket mounting bracket to the front section pipe. The basket mounting bracket includes a rod and a mounting piece welded to the rod. The rod is welded to the front section pipe. The second clamping cylinder is fixedly installed on the seventh bracket, and the front end of the telescopic rod of the second clamping cylinder is fixedly installed with a truncated cone-shaped cylinder. A magnetic head is fixed on the front end of the truncated cone-shaped cylinder. When in use, the rod is sleeved on the truncated cone-shaped cylinder and adsorbed by the magnetic head. The second clamping cylinder pushes the rod to the front section of the tube and clamps it. The third clamping cylinder and the mounting part support seat are also fixedly installed on the seventh bracket. When the mounting part is placed on the mounting part support seat, the mounting part contacts the rod part, and the third clamping cylinder drives the first clamping block to press the mounting part down from above the mounting part to clamp the mounting part on the mounting part support seat.

7. The positioning tool for welding the electric vehicle head tube assembly according to claim 6, characterized in that: The hole on the mounting piece is a rectangular hole. The mounting piece support seat is provided with two second positioning rods. Relative to the rectangular hole, the two second positioning rods are located at one set of diagonal positions.

8. The positioning tool for welding the electric vehicle head tube assembly according to claim 5, characterized in that: A base for supporting the ECU mounting bracket is also fixedly mounted on the seventh bracket, and a cylinder body of a fourth clamping cylinder for pressing the ECU mounting bracket onto the base is fixed on the eighth bracket.

9. The positioning tool for welding the electric vehicle head tube assembly according to claim 1, characterized in that: The positioning fixture for three-sequence welding includes a third base plate and a ninth bracket, a tenth bracket, an eleventh bracket, a twelfth bracket, and a thirteenth bracket fixed to the third base plate. The cooperation between the ninth bracket and the head pipe is the same as the cooperation structure between the fifth bracket and the head pipe, and the cooperation between the tenth bracket and the head pipe is the same as the cooperation structure between the sixth bracket and the head pipe. The cooperation structure between the ninth bracket and the tenth bracket and the head pipe on the third base plate is opposite to the cooperation structure between the fifth bracket and the sixth bracket and the head pipe on the second base plate. The assembly formed by the head pipe and the main beam tube is rotated 180 degrees relative to the second base plate and then clamped and fixed. The eleventh bracket is located behind the fifth bracket. The matching structure between the eleventh bracket and the front section pipe is the same as the matching structure between the third bracket and the front section pipe, and is used to clamp and support the front section pipe. The left side of the twelfth bracket is fixedly installed with a clamping mechanism, and the right side of the twelfth bracket is fixedly installed with a speaker bracket support seat. After the speaker bracket is placed on the speaker bracket support seat, the clamping mechanism presses and fixes the speaker bracket on the speaker bracket support seat from above the speaker bracket.

10. The electric vehicle head tube assembly welding positioning tool as claimed in claim 9, characterized in that: The thirteenth bracket is located between the eleventh bracket and the ninth bracket, and the cylinder body of the jacking cylinder is fixedly installed on the thirteenth bracket. The piston rod of the jacking cylinder is fixedly connected to the child seat mounting bracket seat. After the child seat mounting bracket is placed on the child seat mounting bracket seat, the jacking cylinder pushes up so that the child seat mounting bracket contacts the front section pipe from the bottom of the front end pipe.

Images