Flexible positioning device for assembling and welding inner and middle gantries

Abstract

The utility model discloses a flexible positioning device for assembling and welding an inner middle door frame. The flexible positioning device comprises a base and U-shaped hollow operation areas symmetrically arranged at the two ends of the base. An end positioning mechanism and an opening positioning assembly are slidably mounted on the top end face of the base. The end positioning mechanism comprises an end positioning bottom plate, an end positioning assembly is installed on the end positioning bottom plate through a support, the end positioning assembly comprises a supporting frame, at least one set of upper cross beam positioning pieces with different lengths are rotationally installed on the supporting frame, and a channel steel positioning plate is fixedly arranged on the inner side wall of the support; the open gear positioning assembly comprises an open gear positioning bottom plate, two open gear positioning rotating bodies and two clamping assemblies are symmetrically installed on the open gear positioning bottom plate, and the clamping assemblies move relatively and clamp the channel steel with the open gear positioning rotating bodies. The positioning device can adapt to assembly of different gantries, such as a basic inner gantry, a three-section middle gantry and a three-section inner gantry, and is high in adaptability.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to an assembly welding flexible positioning device for an inner-middle door frame. Background Art

[0002] The forklift mast is the main load-bearing structure of the forklift pickup device, which consists of a mast, fork frame, forks, sprockets, chains, lifting cylinders and tilting cylinders. The mast structure includes two-stage masts and three-stage masts. The two-stage mast is a two-stage telescopic device consisting of an outer mast and an inner mast, and the inner mast moves along the outer mast.

[0003] The three-stage gantry is a three-stage telescopic device consisting of an outer gantry, a middle gantry and an inner gantry. The inner gantry moves along the middle gantry, and the middle gantry moves along the outer gantry, thereby realizing the lifting and loading and unloading of goods. Although the middle gantry and the inner gantry (referred to as the inner middle gantry) are both composed of two channel steels and a crossbeam connected between the two channel steels, the structures of the inner gantry in the two-stage gantry and the middle gantry and inner gantry in the three-stage gantry are different. The inner gantry in the two-stage gantry is a basic inner gantry, such as Fig.11 As shown, a middle crossbeam C13 is connected between the basic inner mast channel steel C11, and an inner mast crossbeam assembly C12 is installed on the top of the basic inner mast channel steel C11. The upper crossbeam assembly C12 includes an upper crossbeam and a cylinder head seat and a fixed clamping plate installed on the upper crossbeam. The middle mast in the three-stage mast is a three-section middle mast, and its structure is as follows Fig.12 As shown, the lower crossbeam and the upper crossbeam C25 of the middle mast are connected between the three-section middle mast channel steel C21, the pulley support plate C24 is installed on the upper crossbeam C25 of the middle mast, and the cylinder seat C22 and the sprocket seat C23 are symmetrically installed on the three-section middle mast channel steel C21 located at one end of the upper crossbeam C25 of the middle mast. The inner mast in the three-stage mast is a three-section inner mast, and its structure is as follows Fig.13 As shown, an upper crossbeam, a middle crossbeam C33 and a lower crossbeam assembly C34 are installed between the three sections of the inner portal frame channel steel C31, and a chain plate C32 is symmetrically installed on the three sections of the inner portal frame channel steel C31 located at one end of the lower crossbeam assembly C34.

[0004] When assembling and welding the above-mentioned basic inner mast, three-section middle mast, and three-section inner mast, it is necessary to position and weld the channel steel, beams, and other components, so welding molds are needed to position the components. Since there are 48 different specifications of the three major types of masts, such as the basic inner mast, three-section middle mast, and three-section inner mast, the length and spacing of the channel steel are different to adapt to the use of forklift masts of different specifications. For example, the length of the channel steel of different mast products is about 1300-3000mm. If each product is welded with a separate mold, multiple molds are required and the assembly site is large. Therefore, in order to save costs and space, it is necessary to design an inner and middle mast assembly mold that can be compatible with these three types of masts, and cover the channel steel (1300-3000mm) of all masts. Utility Model Content

[0005] In order to solve the above existing problems, the utility model provides a flexible positioning device for welding an inner-middle door frame.

[0006] The technical solution of the utility model is as follows:

[0007] A flexible positioning device for welding an inner-middle door frame, comprising a base, with U-shaped hollowed-out operating areas symmetrically opened at both ends of the base; an end positioning mechanism and an opening and closing positioning assembly are slidably mounted on the top surface of the base; the end positioning mechanism comprises an end positioning bottom plate slidably connected to the base, an end positioning assembly is mounted on the end positioning bottom plate through a bracket, and the end positioning assembly comprises a support frame, on which at least one group of upper crossbeam positioning members of unequal lengths is rotatably mounted; a channel steel positioning plate is fixedly mounted on the inner side wall of the bracket;

[0008] The opening positioning assembly is used to position the opening of two channel steels, and includes an opening positioning base plate slidably connected to the base, and two opening positioning swivels are symmetrically installed on the opening positioning base plate; two clamping assemblies are symmetrically installed on the opening positioning base plate located between the two opening positioning swivels, and the clamping assembly moves relative to the opening positioning swivel located at the same end, and clamps a channel steel together with the opening positioning swivel.

[0009] In a further solution, a middle cross beam positioning frame is slidably mounted on the top surface of the base, and the middle cross beam positioning frame is located on the center line of the two opening positioning bottom plates.

[0010] According to a further solution, two opening positioning assemblies are provided and are symmetrically arranged along the length direction of the base; a lower beam positioning assembly is slidably installed at the end of the base; the lower beam positioning assembly includes a fixed plate slidably connected to the base, a lower beam positioning block is installed on the top surface of the fixed plate through a supporting platform, and a support pin is movably inserted on the top surface of the lower beam positioning block.

[0011] Preferably, the support platform and the fixed plate are connected by a lower positioning pin and the bottom end of the lower positioning pin is connected and positioned with the base, and the lower crossbeam positioning assembly and the support platform are connected by an upper positioning pin; a centering positioning pin is provided in the middle of the lower crossbeam positioning assembly.

[0012] According to a further solution, the upper crossbeam positioning piece is an L-shaped structure formed by fixing a connecting rod and a supporting column, and the end of the connecting rod is installed on the supporting frame through a rotating shaft, so that the upper crossbeam positioning piece rotates around the rotating shaft; when the connecting rod is placed horizontally, the outer end of the supporting column faces the upper crossbeam of the inner middle door frame for positioning; when the connecting rod is in a vertical state, the door frame is demoulded.

[0013] Preferably, two groups of upper crossbeam positioning members of unequal lengths are movably mounted on the support frame, and each group includes at least three upper crossbeam positioning members.

[0014] According to a further solution, the clamping assembly includes a slide rail fixedly mounted on the opening and positioning base plate, the slide rail is slidably connected to a slider, and a clamping block is fixedly mounted on the slider; a driving device is fixedly mounted on the opening and positioning base plate, and a driving end of the driving device is connected to the slider, thereby driving the clamping block to move on the slide rail, and clamp or release the channel steel together with the opening and positioning swivel.

[0015] Preferably, the driving end of the driving device is connected to the slider via a connecting plate, and a clamping head is horizontally mounted on the clamping block.

[0016] In a further embodiment, the opening and positioning rotating body comprises a positioning core shaft fixedly mounted on the opening and positioning bottom plate, the outer periphery of the positioning core shaft is sequentially sleeved with a lower rotating body and an upper rotating body by rotation from bottom to top, the outer side wall of the upper rotating body is fixedly provided with a long positioning seat and a short positioning seat, and the long positioning seat or the short positioning seat is located on the same horizontal line as the clamping assembly;

[0017] An anti-rotation seat and a connecting seat are respectively fixed on the outer side wall of the lower rotating body, the anti-rotation seat is rotatably connected with an anti-rotation clamping plate, and the anti-rotation clamping plate is movably buckled with the upper rotating body;

[0018] A driving mechanism is fixedly arranged on the opening and positioning bottom plate, and a driving end of the driving mechanism is connected to the connecting seat through a pin shaft to drive the lower rotating body to rotate.

[0019] In a preferred embodiment, the lower rotating body and the upper rotating body are rotatably connected to the positioning core shaft through bushings respectively;

[0020] The opening gear positioning swivel is connected to an opening gear positioning block, which includes a connecting block, a clamping head is installed at one end of the connecting block, and an installation groove is opened at the other end; the end of the long positioning seat or the short positioning seat is inserted into the installation groove and connected by a pin.

[0021] In a further solution, a front guide rail, a middle guide rail and a rear guide rail are fixedly installed on the top surface of the base, the end positioning mechanism and the front gear opening positioning assembly are slidably connected to the front guide rail through the end positioning assembly slide and the gear opening positioning assembly slide respectively, the rear gear opening positioning assembly and the lower beam positioning assembly are slidably connected to the rear guide rail through the gear opening positioning assembly slide and the lower beam positioning assembly slide respectively, and the middle beam positioning frame is slidably connected to the middle guide rail through the middle beam fixing frame slide.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present application, a U-shaped hollow structure of a certain length is provided in the middle of both ends of the base as an operation area. Workers can enter this operation area to place each component on the positioning device and perform fine-tuning operations. Even when assembling door frames of different lengths, workers can enter the operation areas at both ends to perform operations, thereby improving the convenience of operation.

[0024] 2. The positioning device of the present application is provided with multiple sets of guide rails on the base, and the end positioning mechanism and the opening positioning assembly are slidably connected to the guide rails, so that each component can adjust its position according to the realized length of the door frame. Specifically: the end positioning mechanism and the first set of opening positioning assemblies are arranged on the front guide rail, and the common rail is used to realize the change of the relative position of the end positioning of different types of door frames and the first set of opening positioning assemblies; at the same time, when assembling door frames of different lengths, the lower end of the door frame falls on the hollow operating area of ​​the base, which is convenient for manual operation; the rear guide rail is arranged with the lower beam positioning assembly and the second set of opening positioning assemblies, and the common rail is used to realize the change of the relative position of the lower beam assembly of different types of door frames and the second set of opening positioning assemblies; and the minimum distance between the front guide rail and the rear guide rail is 300mm to meet the assembly requirements of ultra-short door frames; the middle guide rail is arranged with the middle beam positioning frame, which is used to position the middle beam, reinforcing beam and other beams in different positions in the middle.

[0025] 3. The opening positioning assembly in this positioning device is used to position the two channel steels, and a centering platform is provided in the middle to center the upper crossbeams of different types; the upper swivel is provided with two positioning seats of different lengths, which can be used to meet the large differences in the opening of the door frame. The two positioning seats are one long and one short, which can reduce the number of times the opening positioning block is replaced and improve the compatibility range of different opening door frames;

[0026] 4. The mid-end positioning mechanism of the present application includes positioning the end face of the channel steel and the end of the upper crossbeam, and the channel steel positioning plate is used to fix the end of the channel steel; in addition, due to the different distances between the upper crossbeam and the end of the channel steel, upper crossbeam positioning pieces of different lengths are used to position the end of the upper crossbeam. When in use, it is flipped to the working state, and when not in use, it can be flipped to the demoulding state, which makes mold change quick and convenient;

[0027] 5. In the present application, the lower beam positioning assembly is installed on the rear guide rail and can be moved arbitrarily along the direction of the channel steel to meet the positioning requirements of gantries of different lengths. At the same time, the lower beam positioning assembly is connected to the base as a whole through the lower positioning pin; when the lower positioning pin is pulled out, the lower beam positioning assembly can be moved along the guide rail to a suitable position, or removed from the base. The lower beam positioning assembly and the support platform are connected by the upper positioning pin, which makes it easy to replace the lower beam positioning assembly, and can be replaced with a suitable size according to actual conditions. In addition, the top surface of the lower beam positioning assembly is movably connected with a support pin. The number of support pins can be designed according to actual conditions, and can be easily replaced to replace support pins of suitable height to support the upper beam.

[0028] 6. The middle crossbeam positioning frame in the present application is installed on the middle guide rail of the base and can move forward and backward along the guide rail. The platform also belongs to the centering and supporting structure. Its height is lower than the lower surface of the portal frame channel steel and can move smoothly along the direction of the portal frame channel steel. Relevant crossbeam positioning structures can be added to the middle crossbeam positioning frame for different products.

[0029] In summary, the positioning device of the present application can adapt to different gantry assemblies, such as the basic inner gantry, the three-section middle gantry, the three-section inner gantry, etc., and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of this application.

[0031] Figure 2 is a schematic diagram of the structure of the base in this application,

[0032] Figure 3 This is a schematic diagram of the installation of the sliding assembly and the base in this application.

[0033] Figure 4 This is a schematic diagram of the first state of the mid-end positioning component in this application.

[0034] Figure 5 This is a schematic diagram of the second state of the mid-end positioning component in this application.

[0035] Figure 6 This is a schematic diagram of the structure of the opening and positioning assembly in this application.

[0036] Figure 7 This is a schematic diagram of the structure of the opening and positioning swivel in this application.

[0037] Figure 8 This is a schematic diagram of the structure of the opening and positioning block in this application.

[0038] Fig. 9 is a schematic diagram of the structure of the clamping assembly in this application,

[0039] Fig.10 This is a schematic diagram of the structure of the lower beam positioning assembly in this application.

[0040] Fig.11 This is a schematic diagram of the structure of the basic inner door frame.

[0041] Fig.12 This is a schematic diagram of the structure of the three-section portal frame.

[0042] Fig.13 This is a schematic diagram of the structure of the three-section inner door frame.

[0043] Fig.14 A schematic diagram of positioning and assembling a basic inner door frame by the positioning device of the present application;

[0044] Fig.15 A schematic diagram of positioning and assembling the three-section middle mast by the positioning device of the present application;

[0045] Fig.16 This is a schematic diagram of the positioning assembly of the three-section inner door frame by the positioning device of the present application.

[0046] In the figure: 1 base, 1-1 operation area;

[0047] 2 end positioning mechanism, 2-1 end positioning bottom plate, 2-2 channel steel positioning plate, 2-3 upper crossbeam positioning piece, 2-31 upper crossbeam positioning piece in working state, 2-32 upper crossbeam positioning piece in demoulding state, 2-4 rotating shaft 1, 2-5 positioning pin, 2-6 bracket, 2-7 support frame;

[0048] 3 opening and positioning assembly, 3-1 opening and positioning base plate, 3-2 opening and positioning swivel, 3-21 positioning mandrel, 3-22 long positioning seat, 3-23 lower swivel, 3-24 connecting seat, 3-25 upper swivel, 3-26 short positioning seat, 3-27 latch, 3-28 anti-rotation seat, 3-29 rotating shaft 2, 3-210 anti-rotation card plate;

[0049] 3-3 opening positioning block, 3-31 connecting block, 3-32 mounting slot, 3-33 clamping head,

[0050] 3-4 clamping assembly, 3-41 slide rail, 3-42 slider, 3-43 connecting plate, 3-44 clamping block, 3-45 clamping head,

[0051] 3-5 clamping cylinder, 3-6 centering platform, 3-7 height support plate, 3-8 positioning cylinder;

[0052] 4 sliding assembly, 4-1 front guide rail, 4-2 middle guide rail, 4-3 rear guide rail, 4-4 end positioning assembly slide, 4-5 opening positioning assembly slide, 4-6 middle crossbeam fixed frame slide, 4-7 lower crossbeam positioning assembly slide;

[0053] 5 lower beam positioning assembly, 5-1 fixing plate, 5-2 supporting platform, 5-3 lower beam positioning block, 5-4 lower positioning pin, 5-5 upper positioning pin, 5-6 supporting pin, 5-7 centering positioning pin;

[0054] 6 Middle beam positioning frame

[0055] C1 basic inner door frame, C11 basic inner door frame channel steel, C12 inner door frame upper beam, C13 middle beam;

[0056] C2 three-section middle mast, C21 three-section middle mast channel steel, C22 oil cylinder seat, C23 sprocket seat, C24 pulley support plate, C25 middle mast upper beam;

[0057] C3 three-section inner mast, C31 three-section inner mast channel steel, C32 hanging chain plate, C33 middle crossbeam, C34 lower crossbeam assembly. DETAILED DESCRIPTION

[0058] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] Embodiment 1:

[0060] See also Figure 1-10 The present application provides a flexible positioning device for the assembly welding of an inner-middle mast, comprising a base 1, wherein both ends of the base 1 are symmetrically provided with U-shaped hollow operating areas 1-1; when the inner-middle mast is welded, workers can enter the operating area 1-1 to place each component on the positioning device and perform fine-tuning operations, so that when assembling masts of different lengths, workers can enter the operating areas 1-1 at both ends to operate, thereby improving the convenience of operation.

[0061] An end positioning mechanism 2 and an opening positioning assembly 3 are slidably installed on the top surface of the base 1; the end positioning mechanism 2 includes an end positioning base plate 2-1 slidably connected to the base 1, and an end positioning assembly is installed on the end positioning base plate 2-1 through a bracket 2-6, and the end positioning assembly includes a support frame 2-7, and at least one group of upper crossbeam positioning members 2-3 of unequal lengths are rotatably installed on the support frame 2-7; a channel steel positioning plate 2-2 is fixed on the inner side wall of the bracket 2-6; the opening positioning assembly 3 is used to position the opening of two channel steels, and it includes an opening positioning base plate 3-1 slidably connected to the base 1, and two opening positioning swivels 3-2 are symmetrically installed on the opening positioning base plate 3-1; two clamping assemblies 3-4 are symmetrically installed on the opening positioning base plate 3-1 located between the two opening positioning swivels 3-2, and the clamping assembly 3-4 moves relative to the opening positioning swivel 3-2 located at the same end, and clamps a channel steel together with the opening positioning swivel 3-2.

[0062] In this embodiment, the end positioning mechanism 2 positions the ends of the two channel steels and the upper crossbeam installed between the two channel steels. Specifically, the end positioning mechanism 2 is first moved so that the rear ends of the channel steels of the portal frames of different lengths can fall on the operating area 11 on the base 1, which is convenient for workers to operate in the rear end space; then the two channel steels are hoisted onto the positioning device, and the ends of the channel steels are closely attached to the end faces of the channel steel positioning plates 2-2, that is, the length direction of the channel steels is positioned. In this embodiment, the channel steel positioning plates 2-2 are flat blocks with a large end area to adapt to the lateral movement of the channel steels.

[0063] In this embodiment, the opening positioning assembly 3 is used to position the opening between two channel steels. That is, by adjusting the distance between the clamping assembly 3-4 and the opening positioning swivel 3-2, the outer side of the channel steel is positioned and the inner side is clamped, so as to realize the positioning of the door frame width and the opening between the two channel steels. Finally, the upper crossbeam, the middle crossbeam and other components are installed between the two channel steels.

[0064] In order to support and position the middle beam in the middle of the two channel steels, a middle beam positioning frame 6 is slidably mounted on the top surface of the base 1, and the middle beam positioning frame 6 is located on the center line of the two open positioning bottom plates 3-1. When welding, first mark the position of the middle beam to be assembled on the two positioned channel steels, move the middle beam positioning frame 6 to the position, place the middle beam on the middle beam positioning frame 6, and then weld and assemble the middle beam.

[0065] The middle cross beam positioning frame 6 is located in the middle of two channel steels and can move freely between the two positioned channel steels. If there are multiple middle cross beams, they can be supported and welded in sequence.

[0066] In order to respectively perform opening and positioning on both ends of the longer channel steel, two opening and positioning assemblies 3 are provided and are symmetrically arranged along the length direction of the base 1 .

[0067] At the same time, in order to adapt to the positioning of the lower beam on the three-section inner door frame, a lower beam positioning assembly 5 is slidably installed at the end of the base 1; the lower beam positioning assembly 5 includes a fixed plate 5-1 slidably connected to the base 1, and the top surface of the fixed plate 5-1 is installed with a lower beam positioning block 5-3 through a supporting platform 5-2, and the top surface of the lower beam positioning block 5-3 is movably plugged with a supporting pin 5-6.

[0068] In another embodiment, the support platform 5-2 and the fixed plate 5-1 are connected by a lower positioning pin 5-4 and the bottom end of the lower positioning pin 5-4 is connected and positioned with the base 1, and the lower beam positioning block 5-3 and the support platform 5-2 are connected by an upper positioning pin 5-5; the middle card of the lower beam positioning block 5-3 is provided with a centering positioning pin 5-7.

[0069] The lower beam positioning assembly 5 can be selected according to the drop size between the upper beam on the door frame and the bottom end surface of the channel steel. Specifically, the support platform 5-2 and the fixed plate 5-1 in the lower beam positioning assembly 5 are connected by the lower positioning pin 5-4, and the bottom end of the lower positioning pin 5-4 is connected and positioned with the base 1, that is, the lower positioning pin 5-4 connects the lower beam positioning assembly 5 as a whole with the base 1; when the lower positioning pin 5-4 is pulled out, the lower beam positioning assembly 5 can be moved to a suitable position along the guide rail, or removed from the base 1. The lower beam positioning block 5-3 and the support platform 5-2 are connected by the upper positioning pin 5-5, so that the lower beam positioning block 5-3 is easy to replace, and can be replaced according to the actual situation. In addition, the top surface of the lower beam positioning block 5-3 is movably connected with a support pin 5-6, the number of which can be designed according to the actual situation, and can be easily replaced, so as to replace the support pin of suitable height to support the upper beam.

[0070] In this embodiment, the upper cross beam positioning member 2-3 is an L-shaped structure formed by fixing a connecting rod and a supporting column, and the end of the connecting rod is installed on the supporting frame 2-7 through a rotating shaft 2-4, so that the upper cross beam positioning member 2-3 rotates around the rotating shaft 2-4; when the connecting rod is placed horizontally, the supporting column is in a vertical state, and its outer end faces the upper cross beam of the inner middle door frame for positioning (such as Figure 4 When the connecting rod is rotated outward and becomes vertical, the door frame is demoulded (as shown in Figure 5 shown).

[0071] In a preferred embodiment, two groups of upper crossbeam positioning members 2-3 of unequal lengths are movably mounted on the support frame 2-7, and each group includes at least three upper crossbeam positioning members 2-3. Figure 5As shown, there are four upper beam positioning members 2-3 of different lengths in the same group, one of which is an upper beam positioning member 2-31 in working state, and the other three are upper beam positioning members 2-32 in demoulding state after being turned back 270° to one side for demoulding or storage to avoid the positioning space. The end positioning mechanism 2 slides on the base to adjust its position, and then is connected to the base 1 with the positioning pin 2-5 for fixing.

[0072] like Fig. 9 As shown, the clamping assembly 3-4 includes a slide rail 3-41 fixedly mounted on the gear opening positioning base plate 3-1, the slide rail 3-41 is slidably connected with a slider 3-42, and a clamping block 3-44 is fixedly mounted on the slider 3-42; a driving device is fixedly mounted on the gear opening positioning base plate 3-1, and a driving end of the driving device is connected to the slider 3-42, thereby driving the clamping block 3-44 to move on the slide rail 3-41, and clamp or release the channel steel together with the gear opening positioning swivel 3-2.

[0073] Preferably, the driving end of the driving device is connected to the slider 3-42 through a connecting plate 3-43, and a clamping head 3-45 is horizontally mounted on the clamping block 3-44.

[0074] In the present application, the driving device and driving mechanism may be selected from a cylinder, an oil cylinder, a linear motor, etc. In the present embodiment, the driving device is a clamping cylinder 3-5, and the driving mechanism is preferably a positioning cylinder 3-8.

[0075] The driving end of the clamping cylinder 3-5 is connected to the slider 3-42 through the connecting plate 3-43. When the clamping cylinder 3-5 works, the slider 3-42 drives the clamping head 3-45 installed on the clamping block 3-44 to move forward or backward in the direction of the opening positioning swivel 3-2, thereby clamping or releasing the channel steel.

[0076] Another embodiment, such as Figure 7 As shown, the opening positioning swivel 3-2 includes a positioning spindle 3-21 fixedly mounted on the opening positioning base plate 3-1, and the outer periphery of the positioning spindle 3-21 is successively rotatably sleeved with a lower swivel 3-23 and an upper swivel 3-25 from bottom to top, and the outer side wall of the upper swivel 3-25 is fixedly provided with a long positioning seat 3-22 and a short positioning seat 3-26, and the long positioning seat 3-22 or the short positioning seat 3-26 is located on the same horizontal line as the clamping assembly 3-4; that is, according to the width size of the door frame, the long positioning seat 3-22 or the short positioning seat 3-26 can be selected to clamp the side wall of the channel steel with the clamping assembly 3-4.

[0077] The outer side wall of the lower rotating body 3-23 is respectively fixed with an anti-rotation seat 3-28 and a connecting seat 3-24, and the anti-rotation seat 3-28 is rotatably connected with an anti-rotation card plate 3-210, and the anti-rotation card plate 3-210 is movably buckled with the upper rotating body 3-25; that is, after the anti-rotation card plate 3-210 is buckled with the upper rotating body 3-25, the upper and lower rotating bodies are connected into one body, which prevents the rotation of the upper rotating body 3-25 and realizes positioning. When the upper rotating body 3-25 needs to be rotated to adjust the position, the anti-rotation card plate 3-210 is pulled outward, and its bottom end is rotated outward around the second rotating shaft 3-29 fixed on the anti-rotation seat 3-28, so that the upper rotating body 3-25 is separated and independent, and then it can rotate freely.

[0078] In another embodiment, in order to control the rotation of the upper and lower swivels, a driving mechanism is fixedly provided on the opening and positioning base plate 3-1, and the driving end of the driving mechanism is connected to the connecting seat 3-24 through a pin shaft to drive the lower swivel 3-23 to rotate. In this embodiment, the driving mechanism is a positioning cylinder 3-8, and the driving end of the positioning cylinder 3-8 is connected to the connecting seat 3-24 through a pin shaft. When the positioning cylinder 3-8 is extended, it can push the connecting seat 3-24 to rotate with the lower swivel 3-23 because it is connected by a pin shaft. When the anti-rotation clamping plate 3-210 is buckled with the upper swivel 3-25, it pushes the entire opening and positioning swivel 3-2 to rotate together, so that the long positioning seat 3-22 or the short positioning seat 3-26 on the opening and positioning swivel 3-2 is separated from the channel steel to achieve demoulding.

[0079] Preferably, the lower rotating body 3-23 and the upper rotating body 3-25 are rotatably connected to the positioning core shaft 3-21 through bushings respectively, so as to improve the smoothness of the rotation of the upper and lower rotating bodies on the positioning core shaft 3-21; a limit seat 3-24 for limiting the driving mechanism is also fixed on the outer wall of the lower rotating body 3-23.

[0080] In order to achieve adaptability and flexibility, the opening and positioning rotating body 3-2 is connected with an opening and positioning block 3-3, such as Figure 8 As shown, the opening and positioning block 3-3 includes a connecting block 3-31, one end of which is provided with a clamping head 3-33 and the other end is provided with a mounting groove 3-32; the end of the long positioning seat 3-22 or the short positioning seat 3-26 is inserted into the mounting groove 3-32 and connected by a latch 3-27. As shown in the figure, the mounting groove 3-32 is not completely milled through, which increases the rigidity of the connecting block 3-31 and reduces its deformation; the latch 3-27 is used to connect and facilitate the replacement of the opening and positioning block 3-3. That is, the long positioning seat 3-22 or the short positioning seat 3-26 is selected according to the actual situation, that is, the opening size of the channel steel, and the opening and positioning block 3-3 of the corresponding size is also selected, and then connected into a whole, so that the distance between the clamping heads 3-33 on the two opening and positioning blocks 3-3 is equal to the distance between the outer walls of the two channel steels.

[0081] A more preferred solution is that a centering platform 3-6 and a height support plate 3-7 are provided on the opening positioning base plate 3-1. The middle centering platform 3-6 is fixed just above the two clamping components 3-4, which is equivalent to a platform and a centering structure. The positioning of the upper crossbeam, lower crossbeam, chain plate and other parts on the door frame can be designed with a positioning frame separately. The relevant positioning space uses this centering platform as the height and centering positioning base to improve the compatibility of the mold. The height support plate 3-7 is movably installed on the rear side of the clamping component 3-4 to support the channel steel. That is, the height support plate 3-7 is used to support the channel steel. Height support plates 3-7 of different heights can be selected according to different types of channel steels, and are inserted or fixed to the opening positioning base plate 3-1 by bolts for easy replacement.

[0082] The use process of the opening positioning assembly 3 in this embodiment is: first select the long positioning seat 3-22 or the short positioning seat 3-26 on the upper rotating body 3-25 according to the different door frame opening sizes, that is, rotate the direction of the upper rotating body 3-25 so that the appropriate long positioning seat 3-22 or short positioning seat 3-26 is in the same straight line with the clamping assembly 3-4; then buckle the anti-rotation clamping plate 3-210 to connect the upper rotating body 3-25 and the lower rotating body 3-23 into a whole.

[0083] Then select the opening positioning block 3-3 of suitable size, connect and fix it with the long positioning seat 3-22 or the short positioning seat 3-26 through the latch 3-27, and the door frame opening size positioning is completed. Then select the height support plate 3-7 of suitable height according to different door frame channel steels, and install it on the opening positioning bottom plate 3-1.

[0084] Finally, start the clamping cylinder 3-5 to drive the clamping assembly 3-4 to move in the direction of the opening positioning swivel 3-2 on the same side. When the clamping head 3-45 on the clamping assembly 3-4 fits and presses against the inner wall of the channel steel, the outer wall of the channel steel is pushed to fit against the clamping head 3-33 on the opening positioning block 3-3, thereby completing the clamping positioning of the channel steel.

[0085] When demoulding is required, the clamping cylinder 3-5 is contracted to drive the clamping assembly 3-4 to move outward and disengage from the inner wall of the channel steel, and then the positioning cylinder 3-8 is retracted to drive the opening positioning swivel 3-2 to rotate a certain angle, so that the long positioning seat 3-22 or the short positioning seat 3-26 moves sideways and leaves the outer wall of the channel steel, even if the opening positioning block 3-3 is disengaged from the outer wall of the channel steel, thus completing demoulding.

[0086] In another embodiment, the top surface of the base 1 is fixedly mounted with a front guide rail 4-1, a middle guide rail 4-2, and a rear guide rail 4-3. Figure 3As shown, the front guide rail 4-1 and the rear guide rail 4-3 are both arranged in pairs on both sides of the operating area 1-11 on the base 1, and the middle guide rail 4-2 is located in the middle of the base 1. The end positioning mechanism 2 and the front opening position assembly are slidably connected to the front guide rail 4-1 through the end positioning assembly slide 4-4 and the opening position assembly slide 4-5, respectively, the rear opening position assembly and the lower beam positioning assembly 5 are slidably connected to the rear guide rail 4-3 through the opening position assembly slide 4-5 and the lower beam positioning assembly slide 4-7, respectively, and the middle beam positioning frame 6 is slidably connected to the middle guide rail 4-2 through the middle beam fixed frame slide 4-6.

[0087] Embodiment 2:

[0088] The schematic diagram of positioning and assembling the basic inner door frame is as follows: Fig.14 As shown, the positioning process is as follows:

[0089] S1. According to the length of the gantry, adjust the positions of the end positioning mechanism 2 and the two opening positioning components 3 on the positioning device, so that the two opening positioning components 3 are located at the two ends of the gantry, and at the same time, the top of the channel steel to be assembled is located in the operating area 1-1 on the base 1; the centering platform 3-6 on the opening positioning component 3 is located on the central axis between the two groups of upper beam positioning members 2-3 on the end positioning mechanism 2;

[0090] Then, the end positioning mechanism 2 is fixed to the base 1 through the positioning pins 2-5, and the opening positioning bottom plate 3-1 of the opening positioning assembly 3 is fixed to the base 1 through the pins;

[0091] S2. According to the door frame opening size, rotate the upper swivel 3-25 on the opening positioning assembly 3 so that the short positioning seat 3-26 on it is close to one end of the clamping assembly 3-4 and is located on the same horizontal line. The end of the short positioning seat 3-26 is inserted into the mounting groove 3-32 on the opening positioning block 3-3 and connected by the latch 3-27; then the upper and lower swivels on the opening positioning assembly 3 are connected and positioned by the anti-rotation card plate 3-210;

[0092] S3, lift the two channel steels C11 to be assembled onto the positioning device, so that they are mounted on the end positioning mechanism 2 and the opening positioning assembly 3, and the front end surface of the channel steel is pressed against the channel steel positioning plate 2-2 on the end positioning mechanism 2, and the two clamping assemblies 3-4 are driven to move to the two outer sides respectively, and squeeze with the short positioning seat 3-26 on the opening positioning swivel 3-2 on the same side to clamp one of the channel steels, so as to realize the positioning of the channel steel and the opening of the channel steel;

[0093] S4, placing the upper beam C12 to be assembled on the top surfaces of the two channel steels, and according to the thickness of the upper beam, selecting the matching upper beam positioning member 2-3 on the end positioning mechanism 2 to press the outer end surface of the upper beam to achieve positioning of the upper beam;

[0094] S5. First, draw a positioning line on the channel steel where the middle beam is installed; then adjust the position of the middle beam positioning frame 6 and position it; finally, place the middle beam C13 to be assembled on the middle beam positioning frame 6 for support, and the two ends of the middle beam are respectively set at the positioning lines on the channel steel;

[0095] S6. Weld the positioned channel steel to the upper crossbeam and the middle crossbeam. After the assembly is completed, operate the opening positioning assembly 3 to rotate the upper swivel 3-25 and move the clamping assembly 3-4 in the opposite direction to leave the channel steel; then the upper crossbeam positioning piece 2-3 on the rotating end positioning mechanism 2 is separated from the upper crossbeam, and the assembled gantry can be lifted and transported away.

[0096] When assembling other components on the upper crossbeam in the present application, such as the cylinder seat, sprocket seat, pulley support plate, etc., they can be assembled to the upper crossbeam in advance, and then welded to the channel steel using the device and method of the present application; the positioned upper crossbeam and channel steel can also be positioned and assembled by marking positioning lines on the positioning device.

[0097] Alternatively, it can be positioned with the aid of an auxiliary positioning plate, and can be centered by relying on the centering platform 3-6 on the opening positioning component 3.

[0098] Embodiment 3:

[0099] The schematic diagram of positioning and assembling the three-section middle door frame is as follows: Fig.15 As shown, the positioning process is the same as that of Example 3.

[0100] The difference is that it also includes positioning of the lower crossbeam, and the steps are: adjusting the position and height of the lower crossbeam positioning assembly 5 and positioning it, placing the lower crossbeam to be assembled on the lower crossbeam positioning assembly 5 to achieve positioning.

[0101] Embodiment 4:

[0102] The schematic diagram of positioning and assembling the three-section inner door frame is as follows: Fig.16 As shown, the specific positioning method is the same as that of Example 4.

[0103] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0104] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A flexible positioning device for welding an inner-middle door frame, comprising a base (1), characterized in that: The two ends of the base (1) are symmetrically provided with U-shaped hollow operating areas (1-1); an end positioning mechanism (2) and an opening positioning assembly (3) are slidably mounted on the top surface of the base (1); the end positioning mechanism (2) comprises an end positioning base plate (2-1) slidably connected to the base (1); an end positioning assembly is mounted on the end positioning base plate (2-1) via a bracket (2-6); the end positioning assembly comprises a support frame (2-7); at least one group of upper crossbeam positioning members (2-3) of unequal lengths are rotatably mounted on the support frame (2-7); a channel steel positioning plate (2-2) is fixedly mounted on the inner side wall of the bracket (2-6); The opening positioning assembly (3) is used to position the opening of two channel steels, and comprises an opening positioning base plate (3-1) slidably connected to the base (1), and two opening positioning swivels (3-2) are symmetrically mounted on the opening positioning base plate (3-1); two clamping assemblies (3-4) are symmetrically mounted on the opening positioning base plate (3-1) located between the two opening positioning swivels (3-2), and the clamping assembly (3-4) moves relative to the opening positioning swivel (3-2) located at the same end, and clamps a channel steel together with the opening positioning swivel (3-2).

2. The inner-middle door frame assembly welding flexible positioning device according to claim 1, characterized in that: A middle cross beam positioning frame (6) is slidably mounted on the top surface of the base (1), and the middle cross beam positioning frame (6) is located on the center line of the two opening positioning bottom plates (3-1).

3. The inner-middle door frame assembly welding flexible positioning device according to claim 2 is characterized in that: The opening and positioning components (3) are provided with two and are symmetrically arranged along the length direction of the base (1); A lower crossbeam positioning assembly (5) is slidably mounted at the end of the base (1); the lower crossbeam positioning assembly (5) comprises a fixing plate (5-1) slidably connected to the base (1); a lower crossbeam positioning block (5-3) is mounted on the top surface of the fixing plate (5-1) via a supporting platform (5-2); a supporting pin (5-6) is movably inserted into the top surface of the lower crossbeam positioning block (5-3).

4. The inner-middle door frame assembly welding flexible positioning device according to claim 3 is characterized in that: The support platform (5-2) and the fixed plate (5-1) are connected via a lower positioning pin (5-4), and the bottom end of the lower positioning pin (5-4) is connected and positioned with the base (1); the lower crossbeam positioning block (5-3) and the support platform (5-2) are connected via an upper positioning pin (5-5); and a centering positioning pin (5-7) is provided in the middle of the lower crossbeam positioning block (5-3).

5. The flexible positioning device for inner-middle door frame assembly welding according to claim 1 is characterized in that: The upper crossbeam positioning member (2-3) is an L-shaped structure formed by fixing a connecting rod and a supporting column, and the end of the connecting rod is installed on the supporting frame (2-7) through a rotating shaft (2-4), so that the upper crossbeam positioning member (2-3) rotates around the rotating shaft (2-4); when the connecting rod is placed horizontally, the outer end of the supporting column faces the upper crossbeam of the inner middle door frame for positioning; when the connecting rod is in a vertical state, the door frame is demoulded.

6. The flexible positioning device for inner-middle door frame assembly welding according to claim 5 is characterized in that: Two groups of upper crossbeam positioning members (2-3) of unequal lengths are movably mounted on the support frame (2-7), and each group includes at least three upper crossbeam positioning members (2-3).

7. The inner-middle door frame assembly welding flexible positioning device according to claim 1, characterized in that: The clamping assembly (3-4) comprises a slide rail (3-41) fixedly mounted on the gear opening positioning base plate (3-1), the slide rail (3-41) being slidably connected to a slider (3-42), and a clamping block (3-44) being fixedly mounted on the slider (3-42); a driving device is fixedly mounted on the gear opening positioning base plate (3-1), and a driving end of the driving device is connected to the slider (3-42), thereby driving the clamping block (3-44) to move on the slide rail (3-41), and clamping or releasing the channel steel together with the gear opening positioning swivel (3-2).

8. The flexible positioning device for inner-middle door frame assembly welding according to claim 1 is characterized in that: The opening and positioning rotating body (3-2) comprises a positioning core shaft (3-21) fixedly mounted on the opening and positioning bottom plate (3-1); the outer periphery of the positioning core shaft (3-21) is rotatably sleeved with a lower rotating body (3-23) and an upper rotating body (3-25) from bottom to top; the outer side wall of the upper rotating body (3-25) is fixedly mounted with a long positioning seat (3-22) and a short positioning seat (3-26); the long positioning seat (3-22) or the short positioning seat (3-26) is located on the same horizontal line as the clamping assembly (3-4); An anti-rotation seat (3-28) and a connecting seat (3-24) are respectively fixedly provided on the outer side wall of the lower rotating body (3-23); the anti-rotation seat (3-28) is rotatably connected to an anti-rotation clamping plate (3-210); and the anti-rotation clamping plate (3-210) is movably buckled with the upper rotating body (3-25); A driving mechanism is fixedly arranged on the opening and positioning bottom plate (3-1); a driving end of the driving mechanism is connected to the connecting seat (3-24) via a pin shaft to drive the lower rotating body (3-23) to rotate.

9. The flexible positioning device for inner-middle door frame assembly welding according to claim 8, characterized in that: The lower rotating body (3-23) and the upper rotating body (3-25) are rotatably connected to the positioning core shaft (3-21) via bushings respectively; The opening gear positioning swivel (3-2) is connected to an opening gear positioning block (3-3), and the opening gear positioning block (3-3) comprises a connecting block (3-31), one end of the connecting block (3-31) is provided with a pressing head (3-33), and the other end is provided with a mounting groove (3-32); the end of the long positioning seat (3-22) or the short positioning seat (3-26) is inserted into the mounting groove (3-32) and connected via a latch (3-27).

10. The inner-middle door frame assembly welding flexible positioning device according to claim 3, characterized in that: A front guide rail (4-1), a middle guide rail (4-2) and a rear guide rail (4-3) are fixedly mounted on the top surface of the base (1); the end positioning mechanism (2) and the front opening position assembly are slidably connected to the front guide rail (4-1) via an end positioning assembly slide (4-4) and an opening position assembly slide (4-5), respectively; the rear opening position assembly and the lower beam positioning assembly (5) are slidably connected to the rear guide rail (4-3) via an opening position assembly slide (4-5) and a lower beam positioning assembly slide (4-7), respectively; and the middle beam positioning frame (6) is slidably connected to the middle guide rail (4-2) via a middle beam fixed frame slide (4-6).

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