Assembling and welding tool for stand column plate and roller shaft of fork arm carrier of forklift

Abstract

The utility model provides an assembling and welding tool for a stand column plate and a roller shaft of a fork arm carrier of a forklift, which comprises an assembling and welding platform, a first roller shaft positioning assembly and a second roller shaft positioning assembly, and the first roller shaft positioning assembly and the second roller shaft positioning assembly are oppositely arranged on the left side and the right side of the top surface of the assembling and welding platform; a first clamping device and a second clamping device are arranged on the front side of the top face, and the two clamping devices are used for vertically pressing the first stand column plate to the front sides of the two roller shaft positioning assemblies respectively. The first roller shaft positioning assembly is used for vertically positioning two roller shafts on the first stand column plate, and the second roller shaft positioning assembly is used for vertically positioning one roller shaft on the first stand column plate; a first end positioning assembly is arranged at the left end of the top face, and a first height positioning assembly is further arranged on the front side of the top face. According to the utility model, the perpendicularity between each roller shaft and the upright post plate can be well ensured, and the assembly welding quality and the assembly welding efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of forklift manufacturing, and in particular relates to an assembly welding tool for a forklift cargo fork frame column plate and a roller shaft. Background Art

[0002] When welding the forklift fork frame, first weld the three roller shafts to the column plate to form an axle-column-plate assembly, and then weld the axle-column-plate assembly to the fork frame frame. When welding the roller shaft to the column plate, it is necessary to ensure that the axis of each roller shaft is perpendicular to the column plate while ensuring the positioning size of the roller shaft. In the prior art, the above welding process is usually carried out by manual lap welding, but this method is difficult to ensure the verticality of each roller shaft and the column plate, resulting in poor welding quality and low welding efficiency. Therefore, how to improve the welding quality of the column plate and the roller shaft and improve the welding efficiency has become a technical problem that technicians in this field need to solve urgently. Utility Model Content

[0003] The utility model aims to provide a welding fixture for a forklift fork frame column plate and a roller shaft to solve the above technical problems in the prior art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A welding fixture for a forklift fork frame column plate and a roller shaft, comprising a welding platform, a first roller shaft positioning assembly, and a second roller shaft positioning assembly, wherein the first roller shaft positioning assembly and the second roller shaft positioning assembly are relatively arranged on the left and right sides of the top surface of the welding platform; a first clamping device opposite to the first roller shaft positioning assembly and a second clamping device opposite to the second roller shaft positioning assembly are arranged on the front side of the top surface, the first clamping device is used to vertically press the right end of the first column plate against the front side of the first roller shaft positioning assembly, and the second clamping device is used to The left end of the first column plate is vertically pressed against the front side of the second roller shaft positioning assembly; the first roller shaft positioning assembly is used to vertically position two roller shafts on the side of the first column plate away from the first clamping device, and the second roller shaft positioning assembly is used to vertically position one roller shaft on the side of the first column plate away from the second clamping device; the left end of the top surface is provided with a first end positioning assembly for blocking with the left end surface of the first column plate, and the front side of the top surface is also provided with a first height positioning assembly for supporting the first column plate.

[0006] Preferably, the first height positioning assembly includes a support plate and a height positioning block, the support plate is connected to the assembly welding platform, a positioning groove is provided on the top of the support plate, and a positioning protrusion for matching with the positioning groove is provided on the bottom of the height positioning block.

[0007] Preferably, the first end positioning assembly includes a support seat, an end positioning block and a positioning pin, the support seat is connected to the assembly welding platform, the support seat is an inverted T-shaped structure, and a U-shaped opening groove is vertically provided on the upper end of the first vertical block of the support seat; the end positioning block is a T-shaped structure, and the second vertical block of the end positioning block is used to cooperate with the U-shaped opening groove; a pin hole for the positioning pin to pass through is provided on one side of the U-shaped opening groove, and a mounting hole opposite to the pin hole is provided on the second vertical block.

[0008] Preferably, the first roller shaft positioning assembly includes a first mounting seat, a first clamping block, and a first clamping assembly. The first mounting seat is connected to the assembly welding platform. Two first arc-shaped grooves for matching with the outer circumferential surface of the roller shaft are relatively arranged on the top of the first mounting seat. The left end of the first clamping block is rotatably connected to the left end of the first mounting seat, and the right end of the first clamping block is connected to the right end of the first mounting seat through the first clamping assembly.

[0009] Preferably, the first clamping assembly includes a clamping sleeve, a rotating handle, and a pulling rod. A mounting block is provided on the right end face of the first mounting seat, and a first opening is provided on the mounting block. A second opening opposite to the first opening is provided at the right end of the first clamping block; one end of the pulling rod is rotatably set in the first opening through a fixing pin, and the other end of the pulling rod is threadedly connected to the clamping sleeve; the rotating handle is vertically connected to the clamping sleeve; the pulling rod has a first position located in the second opening and a second position detached from the second opening.

[0010] Preferably, the second roller shaft positioning assembly includes a second mounting seat, a second clamping block, and a second clamping assembly. The second mounting seat is connected to the assembly welding platform. The top of the second mounting seat is provided with a second arc-shaped groove for matching with the outer circumferential surface of the roller shaft. The right end of the second clamping block is rotatably connected to the right end of the second mounting seat, and the left end of the second clamping block is connected to the left end of the second mounting seat through the second clamping assembly.

[0011] Preferably, the first roller shaft positioning assembly also includes a first positioning plate, which is detachably connected to the top of the first mounting seat and spans the first arc-shaped groove located on the left side; the second roller shaft positioning assembly also includes a second positioning plate, which is detachably connected to the top of the second mounting seat and spans the second arc-shaped groove.

[0012] Preferably, a first positioning shaft is threadedly connected to the front lower portion of the first mounting seat and the front lower portion of the second mounting seat.

[0013] Preferably, the first clamping device comprises a fixing seat connected to the assembly welding platform and a quick clamp arranged on the fixing seat.

[0014] Preferably, a third clamping device opposite to the first roller shaft positioning assembly and a fourth clamping device opposite to the second roller shaft positioning assembly are provided on the rear side of the top surface, the third clamping device is used to vertically press the right end of the second column plate against the rear side of the first roller shaft positioning assembly, and the fourth clamping device is used to vertically press the left end of the second column plate against the rear side of the second roller shaft positioning assembly; a second end positioning assembly for blocking the left end surface of the second column plate is also provided at the left end of the top surface, and a second height positioning assembly for supporting the second column plate is also provided on the rear side of the top surface.

[0015] The beneficial effects of the utility model are:

[0016] The utility model is used for the welding fixture of the column plate and the roller shaft of the forklift fork frame. When in use, the first column plate is supported by the first height positioning component, the first end positioning component is used to limit the first column plate, the first clamping device and the second clamping device are used to press the first column plate on the front side of the first roller shaft positioning component and the second roller shaft positioning component and make the first column plate in a vertical state, the first roller shaft positioning component is used to vertically position the two roller shafts on the first column plate, and the second roller shaft positioning component is used to vertically position a roller shaft on the first column plate, so that the verticality between each roller shaft and the first column plate can be better guaranteed, and then the welding quality of the first column plate and each roller shaft can be effectively improved, and the welding efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments, and further describe the specific embodiments of the present utility model in detail in conjunction with the drawings, wherein

[0018] Figure 1 An axonometric view of a welding fixture for a forklift fork frame column plate and a roller shaft provided in an embodiment of the utility model;

[0019] Figure 2 A front view of a welding tool for a forklift fork frame column plate and a roller shaft provided in an embodiment of the utility model;

[0020] Figure 3 for Figure 2 Sectional view along AA direction;

[0021] Figure 4 A right view of a welding tool for a forklift fork frame column plate and a roller shaft provided in an embodiment of the utility model;

[0022] Figure 5 A schematic diagram of a first height positioning assembly provided by an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of a first end positioning assembly provided in an embodiment of the utility model;

[0024] Figure 7 An exploded view of a first roller shaft positioning assembly provided in an embodiment of the utility model;

[0025] Figure 8 An axonometric view of a first roller shaft positioning assembly provided in an embodiment of the utility model;

[0026] Fig. 9 A front view of a first roller shaft positioning assembly provided in an embodiment of the utility model;

[0027] Fig.10 A top view of a first roller shaft positioning assembly provided in an embodiment of the utility model;

[0028] Fig.11 A left side view of the first roller shaft positioning assembly provided in an embodiment of the utility model;

[0029] Fig.12 An axonometric view of a second roller shaft positioning assembly provided in an embodiment of the utility model;

[0030] Fig.13 A front view of a second roller shaft positioning assembly provided in an embodiment of the utility model;

[0031] Fig.14 A top view of a second roller shaft positioning assembly provided in an embodiment of the utility model;

[0032] Fig.15 A left side view of the second roller shaft positioning assembly provided in an embodiment of the utility model;

[0033] Fig.16 A schematic diagram of a first clamping device provided in an embodiment of the utility model;

[0034] Fig.17 A schematic diagram of a fork frame provided in an embodiment of the utility model;

[0035] Fig.18 A schematic diagram of an axle column plate assembly provided in an embodiment of the utility model;

[0036] Fig.19 An axonometric view of a composite roller shaft provided in an embodiment of the utility model;

[0037] Fig. 20 A front view of a composite roller shaft provided in an embodiment of the utility model;

[0038] Fig.21 A top view of a composite roller shaft provided in an embodiment of the utility model;

[0039] Fig. 22 A left side view of the composite roller shaft provided by the embodiment of the utility model;

[0040] Fig.23 An axonometric view of the welding fixture provided by the embodiment of the utility model when in use;

[0041] Fig.24 A front view of the welding tool provided by the embodiment of the utility model when in use;

[0042] Fig.25 for Fig.24 Cross-sectional view along the BB direction;

[0043] Fig.26 This is a left side view of the welding tool provided by the embodiment of the utility model when in use.

[0044] Markings in the accompanying drawings:

[0045] 11. welding platform; 21. first roller shaft positioning assembly; 211. first mounting seat;

[0046] 212, first pressing block, 2121, second opening, 213, first arc-shaped groove,

[0047] 214, compression sleeve, 2141, through hole, 215, rotating handle, 2151, fastening nut,

[0048] 2152, limit stop, 216, pull rod, 217, mounting block, 2171, fixing pin,

[0049] 2172, first opening, 218, rotation pin, 2181, limiting nail, 2182, limiting column;

[0050] 219, first positioning shaft, 2191, locking nut, 2192, first positioning plate,

[0051] 2193, a second positioning shaft, 2194, a screw, 2195, a limiting pin;

[0052] 22. Second roller shaft positioning assembly, 221. Second mounting seat, 222. Second pressing block,

[0053] 223, second arc-shaped groove, 224, second pressing assembly, 225, second positioning plate;

[0054] 31. first clamping device, 311. fixing seat, 312. quick clamp;

[0055] 32. second clamping device, 33. third clamping device, 34. fourth clamping device;

[0056] 41. first end positioning assembly, 411. support seat, 412. first vertical block,

[0057] 413, the second vertical block, 414, the horizontal block, 415, the positioning pin, 416, the right end face of the horizontal block,

[0058] 42. Second end positioning assembly; 51. First height positioning assembly; 511. Support plate;

[0059] 512, height positioning block, 513, positioning protrusion; 52, second height positioning component;

[0060] 61. First column plate, 62. Second column plate, 63. Common roller shaft,

[0061] 64, composite roller shaft, 641, notch, 642, step surface,

[0062] 643. Bottom surface of roller shaft. 65. Fork frame. DETAILED DESCRIPTION

[0063] In order to enable those skilled in the art to better understand the technical solution of the utility model, the solution will be further described in detail below in conjunction with specific embodiments.

[0064] like Figures 1 to 26As shown, the embodiment of the utility model provides a welding fixture for a forklift fork frame column plate and a roller shaft, which includes a welding platform 11, a first roller shaft positioning component 21, and a second roller shaft positioning component 22. The first roller shaft positioning component 21 and the second roller shaft positioning component 22 are relatively arranged on the left and right sides of the top surface of the welding platform; the front side of the top surface is provided with a first clamping device 31 opposite to the first roller shaft positioning component and a second clamping device 32 opposite to the second roller shaft positioning component, the first clamping device is used to vertically press the right end of the first column plate 61 against the front of the first roller shaft positioning component On the side, the second clamping device is used to vertically press the left end of the first column plate on the front side of the second roller shaft positioning assembly; the first roller shaft positioning assembly is used to vertically position two roller shafts on the side of the first column plate away from the first clamping device, and the second roller shaft positioning assembly is used to vertically position a roller shaft on the side of the first column plate away from the second clamping device; the left end of the top surface is provided with a first end positioning assembly 41 for blocking with the left end surface of the first column plate, and the front side of the top surface is also provided with a first height positioning assembly 51 for supporting the first column plate.

[0065] The welding fixture for the column plate and roller shaft of the forklift provided by the embodiment of the utility model, when in use, uses the first height positioning component 51 to support the first column plate, uses the first end positioning component 41 to limit the first column plate, uses the first clamping device 31 and the second clamping device 32 to press the first column plate 61 on the front side of the first roller shaft positioning component 21 and the second roller shaft positioning component 22 so that the first column plate 61 is in a vertical state, that is, perpendicular to the welding platform, uses the first roller shaft positioning component to vertically position the two roller shafts on the first column plate, and uses the second roller shaft positioning component to vertically position one roller shaft on the first column plate, so that the verticality between each roller shaft and the first column plate can be better guaranteed, and then the welding quality of the first column plate and each roller shaft can be effectively improved, and the welding efficiency can be improved.

[0066] Furthermore, if Figure 5 As shown, the first height positioning assembly 51 includes a support plate 511 and a height positioning block 512. The support plate is connected to the assembly welding platform. A positioning groove is provided on the top of the support plate. A positioning protrusion 513 for matching with the positioning groove is provided on the bottom of the height positioning block. With this solution, when in use, the first column plate is placed on the height positioning block, and the height positioning block can be used to support the first column plate.

[0067] Specifically, there may be two first height positioning components 51 , and the two first height positioning components are used to support the bottom surface of the left end and the bottom surface of the middle part of the first column plate respectively.

[0068] Preferably, the height positioning block is connected to the support plate through a lifting structure, so that the height of the first column plate in the vertical direction can be easily adjusted to better meet the requirements of different installation positions of each roller shaft on the first column plate. Of course, the height of the first column plate in the vertical direction can also be adjusted by using height positioning blocks of different thicknesses to cooperate with the support plate.

[0069] like Figure 6 As shown, the first end positioning assembly 41 includes a support seat 411, an end positioning block and a positioning pin 415. The support seat is connected to the assembly welding platform. The support seat is an inverted T-shaped structure. The upper end of the first vertical block 412 of the support seat is vertically provided with a U-shaped opening groove; the end positioning block is a T-shaped structure, and the second vertical block 413 of the end positioning block is used to cooperate with the U-shaped opening groove; one side of the U-shaped opening groove is provided with a pin hole for the positioning pin 415 to pass through, and the second vertical block is provided with a mounting hole opposite to the pin hole. With this solution, the second vertical block of the end positioning block is placed in the U-shaped opening groove of the support seat, and then the positioning pin is passed through the pin hole and matched with the mounting hole, so that the end positioning block can be fixed on the support seat, so that the assembly of the first end positioning assembly is more convenient and its structure is simpler; when in use, the left end face of the horizontal block 414 of the end positioning block or the right end face 416 of the horizontal block is blocked with the left end face of the first column plate, so that the first column plate can be limited. At this time, by using end positioning blocks of different sizes on the support seat, it can be better to limit the first column plates of different specifications.

[0070] Preferably, the positioning pin 415 is threadedly matched with the mounting hole so that the connection between the end positioning block and the support seat is firmer and more reliable.

[0071] Furthermore, if Figures 7 to 11 As shown, the first roller shaft positioning assembly 21 includes a first mounting seat 211, a first clamping block 212, and a first clamping assembly. The first mounting seat is connected to the assembly welding platform. Two first arc-shaped grooves 213 for matching with the outer circumferential surface of the roller shaft are arranged on the top of the first mounting seat. The left end of the first clamping block is rotatably connected to the left end of the first mounting seat, and the right end of the first clamping block is connected to the right end of the first mounting seat through the first clamping assembly. With this solution, the two roller shafts are placed in the two first arc-shaped grooves respectively, and then the first clamping block is connected to the first mounting seat through the first clamping assembly, and the two roller shafts are respectively clamped in the two first arc-shaped grooves by the first clamping block.

[0072] Specifically, the first clamping assembly includes a clamping sleeve 214, a rotating handle 215, and a pull rod 216. A mounting block 217 is provided on the right end face of the first mounting seat, and a first opening 2172 is provided on the mounting block. A second opening 2121 opposite to the first opening is provided at the right end of the first clamping block; one end of the pull rod is rotatably set in the first opening through a fixing pin 2171, and the other end of the pull rod is threadedly connected to the clamping sleeve; the rotating handle is vertically connected to the clamping sleeve; the pull rod 216 has a first position located in the second opening and a second position detached from the second opening. By adopting this scheme, the pull rod is rotated around the fixing pin to place the pull rod in the second position, and then the right end of the first clamping block is rotated to the left end of the first mounting seat, so that the two roller shafts can be conveniently placed in the two first arc-shaped grooves respectively, and then the right end of the first clamping block is rotated to the right end of the second mounting seat, the pull rod is placed in the first position, and the clamping sleeve is tightened by rotating the handle. Since the clamping sleeve is threaded with the pull rod, the clamping sleeve will push the right end of the first clamping block to move downward along the pull rod until the right end of the clamping sleeve is clamped on the right end of the first mounting seat, and the two roller shafts are clamped in the two first arc-shaped grooves respectively.

[0073] Preferably, a plurality of through holes 2141 are evenly arranged on the circumference of the upper section of the clamping sleeve 214, one end of the rotating handle passes through the through holes on the left and right sides of the clamping sleeve and then matches with the fastening nut 2151, and a limited stopper 2152 is arranged on the other end of the rotating handle 215, so that the connection between the rotating handle and the clamping sleeve can be easily realized, and the rotating handle can be effectively prevented from being disengaged from the clamping sleeve. At this time, the inner hole of the lower section of the clamping sleeve matches with the thread of the pull rod.

[0074] Specifically, the left end of the first clamping block can be rotatably connected to the left end of the first mounting seat through a turn pin 218, a limiting column 2182 is provided at one end of the turn pin, and a connecting hole for cooperating with the limiting pin 2181 is provided at the other end of the turn pin, thereby better ensuring the reliability of the rotational connection between the first clamping block and the first mounting seat.

[0075] Furthermore, if Figures 12 to 15As shown, the second roller shaft positioning assembly 22 includes a second mounting seat 221, a second clamping block 222, and a second clamping assembly 224. The second mounting seat is connected to the assembly welding platform. The top of the second mounting seat is provided with a second arc-shaped groove 223 for matching with the outer circumferential surface of the roller shaft. The right end of the second clamping block is rotatably connected to the right end of the second mounting seat, and the left end of the second clamping block is connected to the left end of the second mounting seat through the second clamping assembly. With this scheme, a roller shaft is placed in the second arc-shaped groove, and then the second clamping block is connected to the second mounting seat through the second clamping assembly, and the roller shaft is clamped in the second arc-shaped groove by the second clamping block. The specific structure of the second clamping assembly can be the same as the specific structure of the first clamping assembly, and the connection structure between the second clamping block and the second mounting seat and the connection structure between the first clamping block and the first mounting seat can be the same, which will not be repeated here.

[0076] In one embodiment, the first roller shaft positioning assembly further includes a first positioning plate 2192, which is detachably connected to the top of the first mounting seat and spans the first arc-shaped groove on the left side; the second roller shaft positioning assembly further includes a second positioning plate 225, which is detachably connected to the top of the second mounting seat and spans the second arc-shaped groove. With this solution, when the composite roller shaft needs to be welded on the first column plate, the first positioning plate and the second positioning plate can be respectively installed on the first mounting seat and the second mounting seat, and the first positioning plate and the second positioning plate can be respectively engaged with the notch 641 on the composite roller shaft 64, which can not only realize the positioning of the composite roller shaft, but also prevent the composite roller shaft from rotating, so that the assembly welding tool can be better suitable for the assembly welding operation of the composite roller shaft and the first column plate. It can be understood that the roller shaft in the aforementioned solution can be a composite roller shaft 64 or a common roller shaft 63; when the first positioning plate and the second positioning plate are not installed on the assembly welding tool, the positioning and clamping of the composite roller shaft can also be better achieved.

[0077] Specifically, the first positioning plate 2192 may be an I-shaped plate, one end of which is connected to the first mounting seat via two screws 2194 and a stop pin 2195, and the other end of which is connected to the first mounting seat via a screw. The second positioning plate may also have the same structure as the first positioning plate.

[0078] Preferably, the front lower parts of the first mounting seat 211 and the second mounting seat 221 are both threadedly connected with the first positioning shaft 219. With this solution, the outer end faces of the two first positioning shafts can be blocked with the lower part of the inner side surface of the first column plate, which is away from each clamping device, and at the same time, since the bottom surfaces of the three roller shafts are respectively blocked with the upper part of the inner side surface of the first column plate, by adjusting the depth of the first positioning shaft screwed into the first mounting seat and the second mounting seat, the first column plate can be better prevented from being skewed, which is conducive to ensuring that the first column plate is in a vertical state when being pressed, so that the coaxiality between each roller shaft and the first column plate can be better.

[0079] like Fig.16 As shown, the first clamping device includes a fixing seat 311 connected to the assembly welding platform and a quick clamp 312 arranged on the fixing seat. With this solution, the first column plate can be pressed against the first roller shaft positioning assembly and the second roller shaft positioning assembly by simply operating the quick clamp. The quick clamp is a common device in the prior art and will not be described in detail here; the second clamping device can have the same structure as the first clamping device.

[0080] In another embodiment, a third clamping device 33 opposite to the first roller shaft positioning assembly and a fourth clamping device 34 opposite to the second roller shaft positioning assembly are provided on the rear side of the top surface, the third clamping device is used to vertically press the right end of the second column plate 62 against the rear side of the first roller shaft positioning assembly, and the fourth clamping device is used to vertically press the left end of the second column plate against the rear side of the second roller shaft positioning assembly; a second end positioning assembly 42 for blocking the left end surface of the second column plate is also provided at the left end of the top surface, and a second height positioning assembly 52 for supporting the second column plate is also provided on the rear side of the top surface. By adopting this scheme, the second height positioning assembly is used to support the second column plate 62, the second end positioning assembly is used to limit the second column plate, the third clamping device and the fourth clamping device are used to press the second column plate against the rear sides of the first roller shaft positioning assembly and the second roller shaft positioning assembly and make the second column plate in a vertical state, the first roller shaft positioning assembly is used to vertically position the two roller shafts on the inner side surface of the second column plate, and the second roller shaft positioning assembly is used to vertically position a roller shaft on the inner side surface of the second column plate, so that the welding fixture can not only better ensure the verticality between the three roller shafts and the first column plate, but also better ensure the verticality between the other three roller shafts and the second column plate, so that the welding fixture can clamp and position two column plates and six roller shafts at one time, and can complete the welding of two wheel axle column plate assemblies at one time, further improving the efficiency of the welding operation. It can be understood that, in this embodiment, two roller shafts can be placed in the axial direction of each arc-shaped groove in the first roller shaft positioning assembly and the second roller shaft positioning assembly.

[0081] Preferably, the lower rear parts of the first mounting seat and the second mounting seat are both threadedly connected with the second positioning shaft 2193. With this solution, the outer end faces of the two second positioning shafts can be blocked with the lower part of the inner side surface of the second column plate 62, and at the same time, since the bottom surfaces of the three roller shafts are respectively blocked with the upper part of the inner side surface of the second column plate, by adjusting the depth of the second positioning shaft screwed into the first mounting seat and the second mounting seat, the second column plate can be prevented from being skewed, which is conducive to ensuring that the second column plate is in a vertical state when being pressed, so that the coaxiality between each roller shaft and the second column plate can be ensured to be good.

[0082] Specifically, each positioning shaft can be threadedly connected with a locking nut 2191, so that each positioning shaft can be fixed more firmly on each mounting seat; the two positioning shafts located on the same mounting seat can be coaxially arranged; the axes of the two positioning shafts located on the same side can be on the same horizontal plane; the structure of the second end positioning assembly is the same as that of the first end positioning assembly, and the structure of the second height positioning assembly is the same as that of the first height positioning assembly; the number of second height positioning assemblies can be two, and the two second height positioning assemblies are respectively used to support the bottom surface of the left end and the bottom surface of the middle part of the second column plate; the structures of the third clamping device and the fourth clamping device can be the same as that of the first clamping device.

[0083] The general use process of this utility model is:

[0084] Place each roller shaft in the first arc groove 213 and the second arc groove 223, respectively, so that the step surface 642 of each roller shaft fits with the front side of the first mounting seat and the second mounting seat respectively; install the first positioning plate and the second positioning plate for the composite roller shaft, so that the notch 641 of each composite roller shaft fits with the first positioning plate and the second positioning plate respectively;

[0085] Then, the first pressing assembly and the second pressing assembly are respectively operated to press each roller shaft into the two arc-shaped grooves;

[0086] Place the first column plate on the first height positioning assembly, so that the left end surface of the first column plate 61 is blocked with the first end positioning assembly, the upper part of the inner side surface of the first column plate is in contact with the bottom surface 643 of each roller shaft, and the lower part of the inner side surface of the first column plate is blocked with the outer end surface of each first positioning shaft;

[0087] Operate the quick clamp 312 to push the first column plate 61 toward each roller shaft positioning assembly through the quick clamp until the first column plate is pressed against the bottom surface of each roller shaft and the outer end surface of the positioning shaft, and at the same time, the step surface of each roller shaft is pressed against the front side of the above two mounting seats respectively;

[0088] Then, each roller shaft is welded to the first column plate 61 by spot welding, so that the column plate and each roller shaft are welded together to form a wheel shaft column plate assembly.

[0089] The utility model can better ensure the positioning size between the roller shaft and the column plate, and can reduce labor intensity, improve work efficiency, high positioning accuracy, and ensure the accuracy of assembly welding. The assembly welding tool can quickly and accurately position the column plate and the roller shaft, making it convenient to assemble and weld the column plate and the roller shaft, and can be applied to a variety of fork frames; no special tools such as wrenches are required during operation, and all operations can be achieved in a very labor-saving state, and assembly and demoulding are easy, and the operation is very simple.

[0090] The above are only preferred implementation modes of the present invention. It should be pointed out that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Moreover, after reading the contents of the present invention, relevant technical personnel in the field can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A welding tool for forklift fork frame column plate and roller shaft, characterized in that: It includes a welding platform, a first roller shaft positioning assembly, and a second roller shaft positioning assembly, wherein the first roller shaft positioning assembly and the second roller shaft positioning assembly are relatively arranged on the left and right sides of the top surface of the welding platform; a first clamping device opposite to the first roller shaft positioning assembly and a second clamping device opposite to the second roller shaft positioning assembly are arranged on the front side of the top surface, the first clamping device is used to vertically press the right end of the first column plate on the front side of the first roller shaft positioning assembly, and the second clamping device is used to vertically press the left end of the first column plate on the front side of the second roller shaft positioning assembly; the first roller shaft positioning assembly is used to vertically position two roller shafts on the side of the first column plate away from the first clamping device, and the second roller shaft positioning assembly is used to vertically position one roller shaft on the side of the first column plate away from the second clamping device; a first end positioning assembly for blocking with the left end surface of the first column plate is arranged at the left end of the top surface, and a first height positioning assembly for supporting the first column plate is also arranged on the front side of the top surface.

2. The assembly welding tool for forklift fork frame column plate and roller shaft according to claim 1, characterized in that: The first height positioning assembly includes a support plate and a height positioning block. The support plate is connected to the assembly welding platform. A positioning groove is arranged on the top of the support plate. A positioning protrusion for matching with the positioning groove is arranged on the bottom of the height positioning block.

3. The assembly welding tool for forklift fork frame column plate and roller shaft according to claim 1, characterized in that: The first end positioning assembly includes a support seat, an end positioning block and a positioning pin. The support seat is connected to the assembly welding platform. The support seat is an inverted T-shaped structure. The upper end of the first vertical block of the support seat is vertically provided with a U-shaped opening groove; the end positioning block is a T-shaped structure, and the second vertical block of the end positioning block is used to cooperate with the U-shaped opening groove; one side of the U-shaped opening groove is provided with a pin hole for the positioning pin to pass through, and the second vertical block is provided with a mounting hole opposite to the pin hole.

4. The assembly welding tool for forklift fork frame column plate and roller shaft according to claim 1, characterized in that: The first roller shaft positioning assembly includes a first mounting seat, a first clamping block, and a first clamping assembly. The first mounting seat is connected to the assembly welding platform. Two first arc-shaped grooves for matching with the outer circumferential surface of the roller shaft are relatively arranged on the top of the first mounting seat. The left end of the first clamping block is rotatably connected to the left end of the first mounting seat, and the right end of the first clamping block is connected to the right end of the first mounting seat through the first clamping assembly.

5. The assembly welding tool for forklift fork frame column plate and roller shaft according to claim 4, characterized in that: The first clamping assembly includes a clamping sleeve, a rotating handle, and a pulling rod. A mounting block is arranged on the right end surface of the first mounting seat, and a first opening is arranged on the mounting block. A second opening opposite to the first opening is arranged at the right end of the first clamping block; one end of the pulling rod is rotatably arranged in the first opening through a fixing pin, and the other end of the pulling rod is threadedly connected to the clamping sleeve; the rotating handle is vertically connected to the clamping sleeve; the pulling rod has a first position located in the second opening and a second position detached from the second opening.

6. The welding fixture for forklift fork frame column plate and roller shaft according to claim 4, characterized in that: The second roller shaft positioning assembly includes a second mounting seat, a second clamping block, and a second clamping assembly. The second mounting seat is connected to the assembly welding platform. A second arc-shaped groove is provided on the top of the second mounting seat for matching with the outer circumferential surface of the roller shaft. The right end of the second clamping block is rotatably connected to the right end of the second mounting seat, and the left end of the second clamping block is connected to the left end of the second mounting seat through the second clamping assembly.

7. The welding tool for forklift fork frame column plate and roller shaft according to claim 6, characterized in that: The first roller shaft positioning assembly also includes a first positioning plate, which is detachably connected to the top of the first mounting seat and spans the first arc-shaped groove located on the left side; the second roller shaft positioning assembly also includes a second positioning plate, which is detachably connected to the top of the second mounting seat and spans the second arc-shaped groove.

8. The assembly welding tool for forklift fork frame column plate and roller shaft according to claim 6, characterized in that: The front lower parts of the first mounting seat and the second mounting seat are both threadedly connected with a first positioning shaft.

9. The assembly welding tool for forklift fork frame column plate and roller shaft according to claim 1, characterized in that: The first clamping device comprises a fixing seat connected to the assembly welding platform and a quick clamp arranged on the fixing seat.

10. The assembly welding tool for forklift fork frame column plate and roller shaft according to any one of claims 1 to 9, characterized in that: A third clamping device opposite to the first roller shaft positioning assembly and a fourth clamping device opposite to the second roller shaft positioning assembly are provided on the rear side of the top surface. The third clamping device is used to vertically press the right end of the second column plate against the rear side of the first roller shaft positioning assembly, and the fourth clamping device is used to vertically press the left end of the second column plate against the rear side of the second roller shaft positioning assembly. A second end positioning assembly for blocking the left end surface of the second column plate is also provided at the left end of the top surface, and a second height positioning assembly for supporting the second column plate is also provided on the rear side of the top surface.

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