Repair welding positioner tool for fork arm carrier of forklift

Abstract

The invention discloses a forklift fork arm carrier repair welding positioner tool which comprises a positioner head device (1) and a positioner tail device (2), a fork arm carrier tool (3) is installed between the positioner head device (1) and the positioner tail device (2), and a clamping mechanism (4) is arranged on the fork arm carrier tool (3). The forklift fork arm carrier is supported through the fork arm carrier tool, the clamping mechanism is used for fixing the forklift fork arm carrier to the fork arm carrier tool, the forklift fork arm carrier can be rotated to the angle facilitating repair welding through the displacement machine head device, the application range is wide, operation is easy, and the repair welding efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention relates to a tooling, in particular to a tooling for a welding positioner of a forklift fork rack for repair welding. Background Art

[0002] The forklift fork rack is one of the main structural components of a forklift, and its main function is to install attachments and forks. Due to the numerous forms of attachments, the fork rack is often specially designed. Existing welding jigs interfere with some weld seams and cannot be welded, so repair welding of the fork rack is required.

[0003] Currently, when repairing and welding the fork rack, it is necessary to manually lift the fork rack and then perform the repair welding operation. This method will result in unstable welding quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a tooling for a welding positioner of a forklift fork rack for repair welding to solve the technical problems in the prior art.

[0005] The present invention provides a tooling for a welding positioner of a forklift fork rack for repair welding, including a positioner head device and a positioner tail device. A fork rack tooling is installed between the positioner head device and the positioner tail device, and a clamping mechanism is provided on the fork rack tooling.

[0006] In the aforementioned tooling for a welding positioner of a forklift fork rack for repair welding, preferably, the positioner head device includes a reduction motor, a first base, a head housing, an output shaft connecting gear, a driven gear, and a first connecting flange. The first base is fixedly arranged inside the head housing, the reduction motor is fixedly arranged on the top of the first base, the output shaft connecting gear is fixedly arranged on the output shaft of the reduction motor, the driven gear is rotatably installed on the side wall of the head housing through a rotating shaft, the first connecting flange is fixedly installed on the rotating shaft, and the driven gear meshes with the output shaft connecting gear.

[0007] In the aforementioned tooling for a welding positioner of a forklift fork rack for repair welding, preferably, a detection disk is provided on the rotating shaft. The detection disk is fixedly connected to the driven gear through bolts. A sensor bracket is provided on the top of the reduction motor. The sensor bracket is an L-shaped bracket. The vertical section of the sensor bracket is parallel to the detection disk and has a through hole. One end of the rotating shaft passes through the through hole. Three sensors are installed on the sensor bracket, and three positioning holes are provided on the detection disk.

[0008] In the aforementioned tooling for a welding positioner of a forklift fork rack for repair welding, preferably, a plurality of first idler rollers are rotatably installed on the top of the head housing, and two first guide rods are fixedly arranged on the top of the head housing.

[0009] In the aforementioned forklift fork frame repair welding positioner tooling, preferably, the tail device of the positioner includes a tail housing, a second connecting flange, a second guide rod, and a second unpowered roller. The second connecting flange is rotatably installed on the side wall of the tail housing through a second rotating shaft. A plurality of the second unpowered rollers are rotatably installed on the top of the tail housing, and two of the second guide rods are fixedly installed on the top of the tail housing.

[0010] In the aforementioned forklift fork frame repair welding positioner tooling, preferably, the fork frame tooling includes a tooling bottom plate, rollers, guide plates, stoppers, and flange connecting plates. The tooling bottom plate is a rectangular frame structure. One flange connecting plate is fixedly installed on each of the two wide sides of the tooling bottom plate. Two of the stoppers are fixedly installed on one of the long sides of the tooling bottom plate, and a mounting plate is formed in the middle of the other long side. The clamping mechanism is fixed on the mounting plate. One guide plate is fixedly installed on each of the two long sides of the tooling bottom plate, and a plurality of the rollers are rotatably installed on the tooling bottom plate.

[0011] In the aforementioned forklift fork frame repair welding positioner tooling, preferably, the clamping mechanism includes a cylinder, a clamping head, a second base, and a linear slide rail. The cylinder and two of the linear slide rails are fixedly installed on the second base. The second base is fixed on the mounting plate through bolt assemblies. The clamping head is fixed at the end of the piston rod of the cylinder, and both sides of the clamping head are slidably connected to the two linear slide rails respectively.

[0012] In the aforementioned forklift fork frame repair welding positioner tooling, preferably, a bellows is installed between the two linear slide rails, and a cylinder protective cover is installed outside the cylinder.

[0013] Compared with the prior art, the present invention includes a positioner head device and a positioner tail device. A fork frame tooling is installed between the positioner head device and the positioner tail device, and a clamping mechanism is provided on the fork frame tooling. The fork frame tooling provided by the present invention can support forklift fork frames of various lengths, effectively improving the applicable range of the present invention. After the forklift fork frame is adjusted to the correct position, the clamping mechanism can quickly fix it on the fork frame tooling. Then, the positioner head device can be used to drive the fork frame tooling to rotate, so as to adjust the forklift fork frame to a position convenient for repair welding. The fork frame tooling of the present invention adopts a rectangular frame structure, which can fully expose the welding points to be repaired on the forklift fork frame, facilitating repair welding. The present invention has the advantages of a wide applicable range, a simple structure, and simple operation, can effectively improve the repair welding efficiency, and ensure the stability of the repair welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an isometric view of the present invention;

[0015] Figure 2It is an axonometric view of the variable position head device after removing the head housing;

[0016] Figure 3 It is an axonometric view of the detection disk;

[0017] Figure 4 It is an axonometric view of the variable position tail device;

[0018] Figure 5 It is an axonometric view of the forklift fork rack tooling;

[0019] Figure 6 It is an axonometric view of the clamping mechanism.

[0020] Explanation of reference numerals: Variable position head device 1, reduction motor 11, first base 12, head housing 13, output shaft connecting gear 14, driven gear 15, first connecting flange 16, rotating shaft 17, first non-powered roller 18, first guide rod 19, variable position tail device 2, tail housing 21, second connecting flange 22, second guide rod 23, second non-powered roller 24, forklift fork rack tooling 3, tooling base plate 31, roller 32, guide plate 33, stop block 34, flange connecting plate 35, mounting plate 36, clamping mechanism 4, cylinder protective cover 41, cylinder 42, clamping head 43, second base 44, linear slide rail 45, bellows cover 46, detection disk 5, sensor bracket 51, sensor 52, positioning hole 53. Detailed implementation manners

[0021] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0022] Embodiments of the present invention: As Figures 1 - 6 shown, a welding positioner tooling for a forklift fork rack includes a variable position head device 1 and a variable position tail device 2. A forklift fork rack tooling 3 is installed between the variable position head device 1 and the variable position tail device 2, and a clamping mechanism 4 is provided on the forklift fork rack tooling 3.

[0023] A power device is provided inside the variable position head device 1. The variable position head device 1 can drive the forklift fork rack tooling 3 to rotate. The forklift fork rack tooling 3 is used to support the forklift fork rack, and the forklift fork rack can be fixed on the forklift fork rack tooling 3 through the clamping mechanism 4. During welding repair, the forklift fork rack tooling 3 and the forklift fork rack thereon can be rotated together to an angle suitable for welding repair operations according to requirements, thereby improving the welding repair efficiency.

[0024] Specifically, in this embodiment, the variable-position head device 1 includes a reduction motor 11, a first base 12, a head housing 13, an output shaft connecting gear 14, a driven gear 15, and a first connecting flange 16. The first base 12 is fixedly arranged inside the head housing 13, the reduction motor 11 is fixedly arranged on the top of the first base 12, the output shaft connecting gear 14 is fixedly arranged on the output shaft of the reduction motor 11, the driven gear 15 is rotatably installed on the side wall of the head housing 13 through a rotating shaft 17, the first connecting flange 16 is fixedly installed on the rotating shaft 17, and the driven gear 15 meshes with the output shaft connecting gear 14.

[0025] The reduction motor 11 is composed of a reducer and a motor. The reduction motor 11 is a commercially available product and can be directly purchased. The reduction motor 11 is fixed on the top of the first base 12 through four bolt assemblies, and the first base 12 is fixed on the bottom plate inside the head housing 13 through bolt assemblies. The rotating shaft 17 is rotatably installed on the head housing 13 through bearings. The arrangement of the bearings can ensure the smooth rotation of the rotating shaft 17.

[0026] The driven gear 15 is located directly above the output shaft connecting gear 14. When the reduction motor 11 works, it drives the driven gear 15 to rotate through the output shaft connecting gear 14. The driven gear 15 drives the rotating shaft 17 and the first connecting flange 16 on the rotating shaft 17 to rotate synchronously, and the first connecting flange 16 drives the forklift fork carriage tooling 3 to rotate, realizing the angle adjustment of the forklift fork carriage.

[0027] Further, a detection disk 5 is arranged on the rotating shaft 17. The detection disk 5 is fixedly connected with the driven gear 15 through bolts. A sensor bracket 51 is arranged on the top of the reduction motor 11. The sensor bracket 51 is an L-shaped bracket. The vertical section of the sensor bracket 51 is parallel to the detection disk 5, and through holes are opened on the vertical section. One end of the rotating shaft 17 penetrates through the through holes. Three sensors 52 are installed on the sensor bracket 51, and three positioning holes 53 are opened on the detection disk 5.

[0028] To facilitate the installation of the detection disk 5, three arc-shaped mounting holes 55 are equally spaced in the circumferential direction around the mounting hole 54 at the center of the detection disk 5. Three circular mounting holes (not shown in the figure) are opened on the driven gear 15. Bolts are used to pass through the circular mounting holes on the driven gear 15 and the arc-shaped mounting holes 55 on the detection disk 5, and then nuts are used to tighten and fix. Through the setting of the arc-shaped mounting holes 55, the installation efficiency of the detection disk 5 can be improved, and the problem that the hole positions are not easy to align can be solved.

[0029] In this embodiment, among the three positioning holes 53 on the detection disk 5, two are opened in the axial direction, and the hole center distance between the two positioning holes 53 opened in the axial direction and the mounting hole 54 in the center of the detection disk 5 is different, and the other positioning hole 53 is opened in the radial direction, that is, the positioning hole 53 opened in the radial direction is located on the circumferential surface of the detection disk 5. The three sensors 52 on the sensor bracket 51 work in conjunction with the three positioning holes 53, respectively, and are used to detect the three angular positions of 0°, 90° and 180° of the detection disk 5. It should be noted that only one of the three sensors 52 is shown in the figure, and the other two sensors 52 are not shown in the figure.

[0030] A controller is also provided in the head housing 13. The controller is a commercially available product that can be purchased directly. The controller is not shown in the figure. The controller is electrically connected to the reduction motor 11 and the three sensors 52. Three control switches are installed on the outer wall of the head housing 13. The control switches are not shown in the figure. The three control switches are also electrically connected to the controller. The three control switches are respectively used to adjust the detection disk 5 to 0°, 90° and 180°.

[0031] Furthermore, a plurality of first unpowered rollers 18 are rotatably mounted on the top of the head housing 13 , and two first guide rods 19 are fixedly disposed on the top of the head housing 13 .

[0032] In this embodiment, a downward recessed portion is formed on the top of the machine head housing 13 away from the side of the fork frame fixture 3, and a first non-powered roller 18 with a longer length is rotatably installed in the recessed portion through a bracket. Two first non-powered rollers 18 with a shorter length are installed through a bracket at the upper edge of the side wall of the machine head housing 13 close to the fork frame fixture; a plurality of grooves are provided on the top of the machine head housing 13, and eight grooves are provided in this embodiment, and the eight grooves are distributed in two rows, with four grooves arranged in each row, and a first non-powered roller 18 with a shorter length is rotatably installed in each of the eight grooves. In this embodiment, the rows are parallel to the moving direction of the forklift fork frame, and the columns are perpendicular to the moving direction of the forklift fork frame. The axial directions of all the first non-powered rollers 18 are perpendicular to the moving direction of the forklift fork frame.

[0033] The two first guide rods 19 are used to guide the forklift fork frame, so that each forklift fork frame is in the same position after being moved onto the chuck housing 13, and it is also ensured that the forklift fork frame can fall on the accurate position of the fork frame tooling 3. The middle sections of the two first guide rods 19 are parallel, and the two ends of the two first guide rods 19 are in an outwardly expanded eight-shaped shape.

[0034] The first unpowered roller 18 is provided to facilitate the conveying line of the preceding process to automatically transfer the forklift fork frame to the positioner head device 1, and the forklift fork frame can be easily moved manually without lifting.

[0035] Through the cooperation of connecting the gear 14 and the driven gear 15 through the output shaft, the installation height of the reduction motor 11 can be effectively reduced, so that there is a greater distance between the top of the reduction motor 11 and the top plate of the machine head housing 13, thus leaving enough space for the installation of the first idler roller 18.

[0036] The tail device 2 of the positioner includes a tail housing 21, a second connecting flange 22, second guide rods 23 and second idler rollers 24. The second connecting flange 22 is rotatably installed on the side wall of the tail housing 21 through a second rotating shaft. A plurality of second idler rollers 24 are rotatably installed on the top of the tail housing 21, and two second guide rods 23 are fixedly arranged on the top of the tail housing 21.

[0037] The size of the tail housing 21 is the same as that of the machine head housing 13. The arrangement of the second idler rollers 24 on the tail housing 21 is the same as that of the first idler rollers 18 on the machine head housing 13, and the style and setting method of the second guide rods 23 are also the same as those of the first guide rods 19. There is no power device in the tail device 2 of the positioner, and the second connecting flange 22 rotates passively. The second connecting flange 22 and the first connecting flange 16 are coaxially arranged.

[0038] Furthermore, the forklift fork frame tooling 3 includes a tooling bottom plate 31, rollers 32, guide plates 33, stoppers 34 and flange connecting plates 35. The tooling bottom plate 31 is a rectangular frame structure. One flange connecting plate 35 is fixedly arranged on each of the two wide sides of the tooling bottom plate 31. One of the flange connecting plates 35 is fixedly connected to the first connecting flange 16 through bolts, and the other flange connecting plate 35 is connected to the second connecting flange 22 through bolts.

[0039] The use of the rectangular frame structure for the tooling bottom plate 31 enables the welds on the back of the forklift fork frame to be exposed, facilitating repair welding after a 180° flip.

[0040] Two stoppers 34 are fixedly arranged on one of the long sides of the tooling bottom plate 31, and a mounting plate 36 is formed in the middle of the other long side. The clamping mechanism 4 is fixedly installed on the mounting plate 36 through bolts. One guide plate 33 is fixedly arranged on each of the two long sides of the tooling bottom plate 31, and a plurality of rollers 32 are also rotatably installed on the tooling bottom plate 31.

[0041] The number and positions of the rollers 32 on the tooling bottom plate 31 are arranged according to requirements, and it is necessary to meet the condition of being able to support the two long sides of the forklift fork frame. In this embodiment, three rows of rollers 32 are provided, so that the tooling bottom plate 31 can be compatible with the fork frames of two categories of forklifts with small and large tonnages, achieving full product coverage.

[0042] Two guide plates 33 are used to adjust the position of the forklift fork carriage. When the incoming material position in the previous process is skewed, the forklift fork carriage can be automatically aligned to prevent it from colliding with the fixture components and causing damage.

[0043] Grooves are formed on the sides of the two stoppers 34 facing the clamping mechanism 4. When the clamping mechanism 4 pushes the forklift fork carriage, one long side of the forklift fork carriage is inserted into the grooves on the two stoppers 34, so that the forklift fork carriage will not fall off the tooling bottom plate 31 after being flipped 180°.

[0044] The clamping mechanism 4 includes a cylinder 42, a clamping head 43, a second base 44 and a linear slide rail 45. The cylinder 42 and two linear slide rails 45 are fixedly arranged on the second base 44. The second base 44 is fixed on the mounting plate 36 through bolt assemblies. The clamping head 43 is fixed at the end of the piston rod of the cylinder 42, and both sides of the clamping head 43 are slidably connected to the two linear slide rails 45 respectively.

[0045] The two linear slide rails 45 are arranged in parallel. The lower ends of both sides of the clamping head 43 are slidably matched with the side walls of the two linear slide rails 45. The clamping head 43 adopts a profiling design and is matched with the sawtooth structure on the upper cross beam of the forklift fork carriage. A groove is also formed on the clamping head 43, which is used to clamp the other long side of the forklift fork carriage so that it will not be separated from the clamping head 43 after being flipped 180°.

[0046] An accordion cover 46 is installed between the two linear slide rails 45, and a cylinder protective cover 41 is provided outside the cylinder 42. The setting of the accordion cover 46 can prevent welding fumes from entering and causing increased friction and jamming damage.

[0047] The working principle of the present invention: The forklift fork carriage processed in the previous process is conveyed to the positioner head device 1 through the conveying roller table, and the operator pulls the forklift fork carriage to the forklift fork carriage tooling 3. When the forklift fork carriage moves to a suitable position, the cylinder 42 is manually started. The cylinder 42 pushes the forklift fork carriage. One long side of the forklift fork carriage abuts against the two stoppers 34 and is inserted into their grooves, and the other long side of the forklift fork carriage is inserted into the groove on the clamping head 43. At this time, the forklift fork carriage is effectively fixed on the forklift fork carriage tooling 3.

[0048] Manually check the un-welded areas. According to requirements, control the fork carriage tooling 3 to rotate by the required angle through the control switch. For example, if the position to be repaired by welding requires the forklift fork carriage to rotate 90°, press the corresponding control switch. The controller controls the reduction motor 11 to work. The output shaft is connected to the gear 14 to drive the driven gear 15 to rotate. The rotating shaft 17, the detection disc 5, and the first connecting flange 16 rotate synchronously. When the positioning hole 53 at the 90° position aligns with the corresponding sensor 52, this sensor 52 sends a signal to the controller, and the controller controls the reduction motor 11 to stop working. At this time, the fork carriage tooling 3 drives the forklift fork carriage to rotate 90°. The staff can perform the repair welding operation. After the repair welding is completed, press the control switch corresponding to 0° to rotate the forklift fork carriage back to the initial position. Then control the piston rod of the cylinder 42 to retract, manually push the forklift fork carriage to move onto the tail device 2 of the positioner, and then move to the next working station.

[0049] The structure, features, and function effects of the present invention have been described in detail based on the embodiments shown in the drawings. The above is only the preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modified into equivalent embodiments with equivalent changes, still within the spirit covered by the description and the drawings, should be within the protection scope of the present invention.

Claims

1. A welding and position-changing jig tool for a forklift fork frame, comprising a position-changing head device (1) and a position-changing tail device (2), characterized in that: A fork rack tooling (3) is installed between the indexing head device (1) and the indexing tail device (2), and a clamping mechanism (4) is provided on the fork rack tooling (3).

2. The forklift fork frame repair welding positioner tooling according to claim 1, characterized in that: The indexing head device (1) includes a reduction motor (11), a first base (12), a head housing (13), an output shaft connecting gear (14), a driven gear (15), and a first connecting flange (16). The first base (12) is fixedly arranged inside the head housing (13), the reduction motor (11) is fixedly arranged on the top of the first base (12), the output shaft connecting gear (14) is fixedly arranged on the output shaft of the reduction motor (11), the driven gear (15) is rotatably installed on the side wall of the head housing (13) through a rotating shaft (17), the first connecting flange (16) is fixedly installed on the rotating shaft (17), and the driven gear (15) meshes with the output shaft connecting gear (14).

3. The forklift fork frame repair welding positioner tooling according to claim 2, characterized in that: A detection disk (5) is arranged on the rotating shaft (17), the detection disk (5) is fixedly connected with the driven gear (15) by bolts. A sensor bracket (51) is arranged on the top of the reduction motor (11), the sensor bracket (51) is an L-shaped bracket, the vertical section of the sensor bracket (51) is parallel to the detection disk (5), and through holes are formed in the vertical section. One end of the rotating shaft (17) penetrates through the through holes. Three sensors (52) are installed on the sensor bracket (51), and three positioning holes (53) are formed in the detection disk (5).

4. The forklift fork frame repair welding positioner tooling according to claim 3, characterized in that: A plurality of first idle rollers (18) are rotatably installed on the top of the head housing (13), and two first guide rods (19) are fixedly arranged on the top of the head housing (13).

5. The forklift fork frame repair welding positioner tooling according to claim 1, characterized in that: The indexing tail device (2) includes a tail housing (21), a second connecting flange (22), second guide rods (23), and second idle rollers (24). The second connecting flange (22) is rotatably installed on the side wall of the tail housing (21) through a second rotating shaft. A plurality of the second idle rollers (24) are rotatably installed on the top of the tail housing (21), and two of the second guide rods (23) are fixedly arranged on the top of the tail housing (21).

6. The welding and position-changing machine tooling for forklift fork frames according to claim 1, characterized in that: The fork rack tooling (3) includes a tooling bottom plate (31), rollers (32), guide plates (33), stoppers (34), and flange connecting plates (35). The tooling bottom plate (31) is of a rectangular frame structure. One flange connecting plate (35) is fixedly arranged on each of the two wide sides of the tooling bottom plate (31). Two stoppers (34) are fixedly arranged on one of the long sides of the tooling bottom plate (31), and a mounting plate (36) is formed in the middle of the other long side. The clamping mechanism (4) is fixed on the mounting plate (36). One guide plate (33) is fixedly arranged on each of the two long sides of the tooling bottom plate (31), and a plurality of the rollers (32) are rotatably installed on the tooling bottom plate (31).

7. The welding repair positioner tooling for forklift fork frames according to claim 6, characterized in that: The clamping mechanism (4) includes a cylinder (42), a clamping head (43), a second base (44) and a linear slide rail (45). The cylinder (42) and two linear slide rails (45) are fixedly provided on the second base (44). The second base (44) is fixed to the mounting plate (36) by a bolt assembly. The clamping head (43) is fixed to the end of the piston rod of the cylinder (42). Both sides of the clamping head (43) are respectively slidably connected to the two linear slide rails (45).

8. The forklift fork frame repair welding positioner tooling according to claim 7, characterized in that: A bellows cover (46) is installed between the two linear slide rails (45), and a cylinder protective cover (41) is provided outside the cylinder (42).

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