Assembling and welding tool for fork arm carrier shaft head and assembling method of assembling and welding tool

Abstract

The invention discloses an assembling and welding tool for a fork arm carrier shaft head and an assembling method of the assembling and welding tool, and particularly relates to the technical field of forklifts.The assembling and welding tool comprises an end positioning piece, a jacking device, a roller way conveying device, a shaft head positioning assembly and a lifting frame, the top of a base is fixedly connected with the bottom of the roller way conveying device, and sliding frames are fixedly installed on the two sides of the roller way conveying device; the two sides of the lifting frame are slidably connected with the two sides of the conveying device through the corresponding sliding frames correspondingly. The end positioning pieces and the jacking devices are fixedly installed in the middles of the two sides of the roller way conveying device correspondingly, and the tops of the two lifting frames are slidably connected with the two shaft head positioning assemblies through sliding rails correspondingly. The jacking devices, the end positioning pieces and the roller way conveying device are arranged, and the roller way conveying device is utilized, so that the assembly welding platform does not need to be switched, and the transfer efficiency is improved; by means of cooperation of the jacking devices and the end positioning pieces, various fork arm carrier frames can be clamped, labor is saved, and the fork arm carrier clamping device is compatible with various products.

Description

Technical Field

[0001] The present invention relates to the technical field of forklifts, and more specifically, to a welding and assembling tooling for a fork head of a forklift fork frame and an assembling method thereof. Background Art

[0002] It is known that the function of welding a shaft head on a forklift fork frame is to install a fork frame roller, so that the fork frame roller can roll in the inner gantry channel steel of the forklift, thereby facilitating the lifting, swaying and loading of the fork frame; therefore, the accuracy of the shaft head positioning dimension is crucial; currently, the welding sequence of the fork frame is: first weld the parts except the shaft head to form a fork frame, and then weld the shaft head after correction.

[0003] However, in actual use, there are some problems with the existing shaft head welding:

[0004] 1. There are many types of existing forklift fork frames, so the positioning dimensions of the fork head of the fork frame are different, and the existing fork frame welding and assembling die can only correspond to the products one by one and cannot be compatible with multiple products, so there is a problem of cumbersome die change;

[0005] 2. The existing fork frame welding and assembling die is manually demoulded. If the welding is slightly deformed, the demoulding is relatively difficult and time-consuming.

[0006] Therefore, the present invention proposes a welding and assembling tooling for a fork head of a forklift fork frame and an assembling method thereof as a further improvement. Summary of the Invention

[0007] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a welding and assembling tooling for a fork head of a forklift fork frame and an assembling method thereof to solve the problems raised in the above background art.

[0008] To achieve the above object, the present invention provides the following technical solution: A welding and assembling tooling for a fork head of a forklift fork frame, including a base, and the tooling further includes: an end positioning member for restricting the movement of the fork frame, a top pressing device for cooperating with the end positioning member to fix the fork frame, a roller conveyor device for moving the fork frame, a shaft head positioning assembly for placing the shaft head, and a lifting frame for pushing the shaft head positioning assembly to move.

[0009] The roller conveyor device is fixedly installed on the base, and both sides of the roller conveyor device are slidably connected to both sides of the lifting frame through sliding frames;

[0010] The end positioning member and the top pressing device are respectively fixedly installed in the middle of both sides of the roller conveyor device, and both the end positioning member and the top pressing device are located between the two lifting frames. The tops of the two lifting frames are respectively slidably connected to the two shaft head positioning assemblies through slide rails.

[0011] Further, side push cylinder mounting brackets are fixedly installed at the tops of the two lifting frames. Side push cylinders are installed on the side push cylinder mounting brackets, and the output ends of the side push cylinders are fixedly connected to the shaft head positioning assembly.

[0012] Further, a jacking cylinder is fixedly installed on the base, and the output shaft of the jacking cylinder is fixedly connected to the bottom of the lifting frame.

[0013] Further, the tightening device includes: a fixed frame, a clamping frame, and a tightening cylinder;

[0014] The fixed frame is fixedly installed on the side of the roller conveyor device away from the end positioning member. The bottom of the clamping frame is slidably connected to the top of the fixed frame. The tightening cylinder is fixedly installed at the bottom of the fixed frame, and the output shaft of the tightening cylinder is fixedly connected to the clamping frame.

[0015] Further, a first manual valve for driving the jacking cylinder, a second manual valve for driving the tightening cylinder, and a third manual valve for driving the side push cylinder are fixedly installed on the side of the tightening device away from the roller conveyor device.

[0016] Further, a fixed seat is fixedly installed at one end of the base close to the roller conveyor device. An anti-collision device is rotatably connected to the fixed seat through a rotating shaft;

[0017] The anti-collision device is set in an L shape. The anti-collision device is divided into a lifting section and a blocking section, and one end of the lifting section is fixedly connected to one end of the blocking section;

[0018] The bottom surface of the lifting section contacts the upper surface of the bottom of the lifting frame, and the weight of the blocking section is less than the weight of the lifting section.

[0019] Further, a plurality of uniformly distributed positioning plates for positioning the position of the shaft head are fixedly installed on the inner wall of the top of the lifting frame.

[0020] An assembly method of a group welding tooling, including the group welding tooling for a forklift truck frame shaft head described above;

[0021] The assembly method includes the following specific steps:

[0022] S1: Place the forklift truck frame on the roller conveyor device;

[0023] S2: Clamp the forklift truck frame in S1;

[0024] S3: Position the shaft head positioning assembly at a specified height, and place the shaft head on the sleeve in the shaft head positioning assembly;

[0025] S4: Move the shaft head positioning assembly to the center of the forklift truck frame, and stop pushing when the end face of the shaft head is close to the side face of the forklift truck column plate.

[0026] S5: Spot welding shaft head;

[0027] S6: Move the shaft head positioning assembly to both sides of the forklift carriage frame. After the sleeve in the shaft head positioning assembly is separated from the shaft head, enter S7;

[0028] S7: Withdraw the shaft head positioning assembly to a place convenient for the forklift carriage frame to enter and exit;

[0029] S8: Loosen the forklift carriage frame, complete demolding, and complete group welding.

[0030] Furthermore, in S1, S2, S7, and S8, the anti-collision device does not block the forklift carriage frame from entering and exiting the roller conveyor device;

[0031] In S3 - S6, the anti-collision device blocks the forklift carriage frame from entering and exiting the roller conveyor device.

[0032] Technical effects and advantages of the present invention:

[0033] 1. Compared with the prior art, by setting the tightening device, end positioning member, and roller conveyor device, not only can the roller conveyor device be utilized without switching the group welding platform, improving the transfer efficiency; but also by the cooperation of the tightening device and the end positioning member, various forklift carriage frames can be clamped, saving labor and being compatible with various products; by setting the lifting frame and the shaft head positioning assembly, using the positioning effect of the positioning plate, combined with the side push cylinder and the lifting cylinder, the shaft head on the shaft head positioning assembly can be accurately positioned to the specified group welding position, thereby improving the group welding efficiency and accuracy; by setting the linkage between the anti-collision device and the lifting frame, it is ensured that only one forklift carriage frame is subjected to group welding processing on the roller conveyor device, avoiding mechanical failures.

[0034] 2. Compared with the prior art, by setting the assembly method of the tooling, the operation is simple: the overall die operation does not require special tools such as wrenches, and all operations can be achieved in a very labor-saving state. The loading and demolding are easy, and the operation is also very simple. Brief Description of the Drawings

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0036] Figure 2 It is a schematic diagram of the structure of the end positioning member of the present invention.

[0037] Figure 3 It is a schematic diagram of the structure of the tightening device of the present invention.

[0038] Figure 4 It is a schematic diagram of the structure of the roller conveyor device of the present invention.

[0039] Figure 5This is a schematic structural diagram of the shaft head positioning assembly of the present invention.

[0040] Figure 6 This is an exploded view of the shaft head positioning assembly of the present invention.

[0041] Figure 7 This is a schematic structural diagram of the lifting frame of the present invention.

[0042] Figure 8 This is a schematic structural diagram of the sliding frame of the present invention.

[0043] Figure 9 This is a schematic structural diagram of the anti-collision device of the present invention.

[0044] Figure 10 This is a schematic diagram of the position where the anti-collision device and the positioning plate of the present invention are located.

[0045] Figure 11 This is a schematic diagram of the position of the positioning plate on the lifting frame of the present invention.

[0046] Figure 12 This is a schematic structural diagram of the base of the present invention.

[0047] The reference signs are as follows:

[0048] 1. Base;

[0049] 2. End positioning member; 21. Fixed plate; 22. L-shaped limit block;

[0050] 3. Tightening device; 31. Fixed frame; 32. Clamping frame; 33. Tightening cylinder;

[0051] 4. Roller conveyor device; 41. Rotating roller;

[0052] 5. Shaft head positioning assembly; 51. Shaft head positioning bracket; 52. Sleeve;

[0053] 6. Lifting frame; 7. Sliding frame; 8. Side push cylinder mounting bracket; 9. Side push cylinder; 10. Jacking cylinder; 11. First manual valve; 12. Second manual valve; 13. Third manual valve; 14. Fixed seat;

[0054] 15. Anti-collision device; 151. Lifting section; 152. Blocking section;

[0055] 16. Positioning plate; 17. Footrest. Detailed implementation manners

[0056] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0057] As shown in the appendix Figures 1-12 A welding fixture for the fork head of a fork frame, including a base 1. The fixture further includes: an end positioning member 2 for restricting the movement of the fork frame, a tightening device 3 for cooperating with the end positioning member 2 to fix the fork frame, a roller conveyor device 4 for moving the fork frame, a shaft head positioning assembly 5 for placing the shaft head, and a lifting frame 6 for pushing the shaft head positioning assembly 5 to move.

[0058] As shown in the appendix Figure 1 As shown, the top of the base 1 is fixedly connected to the bottom of the roller conveyor device 4. Among them, feet 17 are also installed at the bottom of the base 1.

[0059] The end positioning member 2 and the tightening device 3 are respectively fixedly installed in the middle of both sides of the roller conveyor device 4, and both the end positioning member 2 and the tightening device 3 are located between the two lifting frames 6.

[0060] As shown in the appendix Figure 2 As shown, among them, the end positioning member 2 includes: a fixing plate 21 and two L-shaped limiting blocks 22. The fixing plate 21 is fixed in the middle of one side of the roller conveyor device 4, and the two L-shaped limiting blocks 22 are fixedly installed on the fixing plate 21. The two L-shaped limiting blocks 22 contact the fork frame and use their own shapes to perform clamping and limiting on the fork frame.

[0061] As shown in the appendix Figure 3 As shown, the tightening device 3 includes: a fixing frame 31, a clamping frame 32, and a tightening cylinder 33.

[0062] The fixing frame 31 is fixedly installed on the side of the roller conveyor device 4 away from the end positioning member 2. The bottom of the clamping frame 32 is slidably connected to the top of the fixing frame 31. The tightening cylinder 33 is fixedly installed at the bottom of the fixing frame 31, and the output shaft of the tightening cylinder 33 is fixedly connected to the clamping frame 32. Among them, when the tightening cylinder 33 drives the clamping frame 32 to move towards the end positioning member 2, it will clamp the fork frame. Therefore, this structure can be compatible with a variety of fork frames.

[0063] As shown in the appendix Figure 1 、 4 As shown in 8, sliding frames 7 are fixedly installed on both sides of the roller conveyor device 4, and both sides of the lifting frame 6 are respectively slidably connected to both sides of the conveyor device 4 through the corresponding sliding frames 7.

[0064] As shown in the appendix Figure 5 and 6 As shown, among them, the shaft head positioning assembly 5 includes: a shaft head positioning bracket 51 and a sleeve 52.

[0065] The shaft head positioning bracket 51 is fixedly installed with a plurality of sleeves 52 through screws, nuts and positioning pins, and the sleeves 52 can be sleeved on the shaft head. When the end face of the shaft head is close to the side surface of the column plate of the forklift frame, the welding of the shaft head can be carried out. Therefore, this structure not only positions quickly and accurately, facilitating manual welding, but also is convenient for welding, labor-saving and easy to demold, thereby improving the welding efficiency;

[0066] As shown in the attached Figure 1 and the attached Figure 7 figure, the tops of the two lifting frames 6 are respectively slidably connected with the two shaft head positioning assemblies 5 through slide rails.

[0067] In a preferred embodiment, as shown in the attached Figure 1 and the attached Figure 7 and the attached Figure 10 and the attached Figure 11 figure, side push cylinder mounting brackets 8 are fixedly installed on the tops of the two lifting frames 6. A side push cylinder 9 is installed on the side push cylinder mounting bracket 8, and the output end of the side push cylinder 9 is fixedly connected with the shaft head positioning assembly 5; so as to use the side push cylinder 9 to drive the shaft head positioning assembly 5 to move towards the forklift frame.

[0068] In a preferred embodiment, as shown in the attached Figure 1 and the attached Figure 10 figure, a jacking cylinder 10 is fixedly installed on the base 1, and the output shaft of the jacking cylinder 10 is fixedly connected with the bottom of the lifting frame 6; so as to use the jacking cylinder 10 to drive the lifting frame 6 to move up and down on the carriage 7.

[0069] In a preferred embodiment, as shown in the attached Figure 1 and the attached Figure 3 and the attached Figure 10 figure, a first manual valve 11 for driving the jacking cylinder 10, a second manual valve 12 for driving the clamping cylinder 33 and a third manual valve 13 for driving the side push cylinder 9 are fixedly installed on the side of the clamping device 3 away from the roller conveyor device 4.

[0070] In a preferred embodiment, as shown in the attached Figure 1 and the attached Figure 9 and the attached Figure 10 figure, a fixed seat 14 is fixedly installed at one end of the base 1 close to the roller conveyor device 4, and an anti-collision device 15 is rotatably connected to the fixed seat 14 through a rotating shaft;

[0071] The shape of the anti-collision device 15 is set to an L shape. The anti-collision device 15 is divided into a lifting section 151 and a blocking section 152, and one end of the lifting section 151 is fixedly connected to one end of the blocking section 152;

[0072] The bottom surface of the lifting section 151 contacts the upper surface of the bottom of the lifting frame 6, and the weight of the blocking section 152 is less than the weight of the lifting section 151.

[0073] Among them, the rotating shaft serving as the lever fulcrum is located at the connection of the lifting section 151 and the blocking section 152;

[0074] In a preferred embodiment, as shown in the attached Figure 10 and the attached Figure 11 As shown, a plurality of uniformly distributed positioning plates 16 for positioning the shaft head position are fixedly installed on the inner wall of the top of the lifting frame 6.

[0075] Among them, when the positioning plate 16 fixed on the lifting frame 6 descends and touches the machined surface of the channel steel of the forklift carriage frame, the descent of the lifting frame 6 stops. At this time, the shaft head positioning assembly 5 has been positioned at the specified height;

[0076] As shown in the attached Figures 1-12 As shown, an assembly method of a group welding tooling includes a group welding tooling for the shaft head of a forklift carriage frame;

[0077] The assembly method includes the following specific steps:

[0078] S1: First, control the lifting cylinder 10 to drive the lifting frame 6 to rise through the first manual valve 11. Since the middle of the anti-collision device 15 is rotatably connected to the fixed seat 14 on the base 1, the bottom surface of the lifting section 151 is used to contact the upper surface of the bottom of the lifting frame 6. Thus, the lifting frame 6 rising drives the lifting section 151 to rise, and the blocking section 152 will descend. At this time, the height of the blocking section 152 is lower than the height of the rotating roller 41 in the roller conveyor device 4, that is, the blocking section 152 no longer obstructs the forklift carriage frame. Then, manually push the forklift carriage frame into the roller conveyor device 4;

[0079] S2: Control the tightening cylinder 33 to drive the clamping frame 32 to move towards the end positioning member 2 through the second manual valve 12 to clamp the forklift carriage frame in S1;

[0080] S3: Control the lifting cylinder 10 to drive the lifting frame 6 to descend through the first manual valve 11. Utilize the fact that the weight of the blocking section 152 is less than the weight of the lifting section 151. The lifting section 151 located on the upper surface of the bottom of the lifting frame 6 descends closely with the upper surface of the bottom of the lifting frame 6 under the action of gravity. Furthermore, the blocking section 152 will rise to block the next workpiece from entering the roller conveyor device 4; that is, the anti-collision device 15 blocks the forklift carriage frame from entering and exiting the roller conveyor device 4; When the positioning plate 16 touches the machined surface of the channel steel of the forklift carriage frame, stop descending. At this time, the shaft head positioning assembly 5 has been positioned at the specified height. Subsequently, manually place the shaft head on the sleeve 52 in the shaft head positioning assembly 5;

[0081] S4: Control the side push cylinder 9 to drive the shaft head positioning assembly 5 to move to the center of the forklift carriage frame through the third manual valve 13. When the end face of the shaft head is close to the side of the forklift carriage column plate, stop pushing;

[0082] S5: The contact area between the end face of the manual spot-welded shaft head and the side surface of the column plate of the fork frame;

[0083] S6: Control the side push cylinder 9 through the third manual valve 13 to drive the shaft head positioning assembly 5 to move to both sides of the fork frame. After the sleeve 52 in the shaft head positioning assembly 5 is separated from the shaft head, enter S7;

[0084] S7: Control the lifting cylinder 10 through the first manual valve 11 to drive the lifting frame 6 to rise. At this time, the shaft head positioning assembly 5 rises with the lifting frame 6, and the shaft head positioning assembly 5 moves away from the fork frame, that is, the shaft head positioning assembly 5 evacuates to a place convenient for the fork frame to enter and exit; and at this time, the lifting of the lifting frame 6 drives the lifting section 151 to rise, so that the blocking section 152 will descend, that is, the anti-collision device 15 does not block the fork frame from entering and exiting the roller conveyor 4;

[0085] S8: Control the tightening cylinder 33 through the second manual valve 12 to drive the clamping frame 32 to move in a direction away from the end positioning member 2, and release the fork frame; thus, the demolding is completed; finally, manually push the assembled and welded fork frame to the next process to complete the assembly and welding.

[0086] Among them, in S1, S2, S7 and S8, the anti-collision device 15 does not block the fork frame from entering and exiting the roller conveyor 4;

[0087] In S3 - S6, the anti-collision device 15 blocks the fork frame from entering and exiting the roller conveyor 4.

[0088] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0089] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding tool for a fork frame shaft head, comprising a base (1), characterized in that: Also includes: An end positioning member (2) for limiting the movement of the fork frame, a tightening device (3) for cooperating with the end positioning member (2) to fix the fork frame, a roller conveyor (4) for moving the fork frame, an axle head positioning assembly (5) for placing the axle head, and a lifting frame (6) for pushing the axle head positioning assembly (5) to move, The roller conveyor device (4) is fixedly mounted on the base (1), and both sides of the roller conveyor device (4) are slidably connected to both sides of the lifting frame (6) via a slide (7); The end positioning member (2) and the tightening device (3) are respectively fixedly mounted at the middle of both sides of the roller conveyor (4), and the end positioning member (2) and the tightening device (3) are both located between two lifting frames (6), and the tops of the two lifting frames (6) are respectively slidably connected to the two shaft head positioning assemblies (5) through slide rails.

2. The assembly welding tool for the fork frame shaft head according to claim 1, characterized in that: A side thrust cylinder mounting bracket (8) is fixedly mounted on the top of the two lifting frames (6), a side thrust cylinder (9) is mounted on the side thrust cylinder mounting bracket (8), and an output end of the side thrust cylinder (9) is fixedly connected to the shaft head positioning assembly (5).

3. The assembly welding tool for the fork frame shaft head according to claim 1, characterized in that: A lifting cylinder (10) is fixedly mounted on the base (1), and an output shaft of the lifting cylinder (10) is fixedly connected to the bottom of the lifting frame (6).

4. The assembly welding tool for the fork frame shaft head according to claim 1, characterized in that: The tightening device (3) comprises: a fixing frame (31), a clamping frame (32) and a tightening cylinder (33); The fixing frame (31) is fixedly mounted on the side of the roller conveyor (4) away from the end positioning member (2); the bottom of the clamping frame (32) is slidably connected to the top of the fixing frame (31); the pressing cylinder (33) is fixedly mounted on the bottom of the fixing frame (31); and the output shaft of the pressing cylinder (33) is fixedly connected to the clamping frame (32).

5. The assembly welding tool for the fork frame shaft head according to claim 2, 3 or 4, characterized in that: A first manual valve (11) for driving a lifting cylinder (10), a second manual valve (12) for driving a tightening cylinder (33), and a third manual valve (13) for driving a side thrust cylinder (9) are fixedly installed on a side of the tightening device (3) away from the roller conveyor device (4).

6. The assembly welding tool for the fork frame shaft head according to claim 1, characterized in that: A fixing seat (14) is fixedly mounted on one end of the base (1) close to the roller conveyor (4), and the fixing seat (14) is rotatably connected to an anti-collision device (15) via a rotating shaft; The anti-collision device (15) is configured to be L-shaped, and is divided into a lifting section (151) and a blocking section (152), and one end of the lifting section (151) is fixedly connected to one end of the blocking section (152); The bottom surface of the lifting section (151) contacts the upper surface of the bottom of the lifting frame (6), and the weight of the blocking section (152) is less than the weight of the lifting section (151).

7. The assembly welding tool for a fork frame shaft head according to claim 1, characterized in that: A plurality of evenly distributed positioning plates (16) for positioning the shaft head are fixedly mounted on the inner wall of the top of the lifting frame (6).

8. An assembly method of a welding fixture, comprising a welding fixture for a fork frame shaft head according to any one of claims 1 to 7, characterized in that: The specific steps include: S1: Place the fork frame onto the roller conveyor (4); S2: Clamp the fork frame in S1; S3: Position the shaft head positioning assembly (5) at a specified height, and place the shaft head on the sleeve in the shaft head positioning assembly (5); S4: Move the shaft head positioning assembly (5) to the center of the fork frame, and stop pushing when the end face of the shaft head is close to the side of the fork frame column plate; S5: spot welding shaft head; S6: Move the shaft head positioning assembly (5) to both sides of the fork frame, and after the sleeve in the shaft head positioning assembly (5) is separated from the shaft head, enter S7; S7: Move the shaft head positioning assembly (5) to a position convenient for the fork frame to enter and exit; S8: Loosen the fork frame, complete demoulding, and complete assembly welding.

9. The assembly method of a welding tool according to claim 8, characterized in that: In S1, S2, S7 and S8, the anti-collision device (15) does not block the fork frame from entering or exiting the roller conveyor device (4); In S3-S6, the anti-collision device (15) blocks the fork frame from entering and exiting the roller conveyor device (4).

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