A hydraulic device with large pulling force column pull rod structure

Abstract

The present invention provides a hydraulic device high-tension column tie rod structure, which relates to the technical field of hydraulic devices, and aims to solve the technical problem that it is difficult to thread a large-diameter upper nut and a large-diameter column in the high-tension column tie rod structure in the prior art; a hydraulic device high-tension column tie rod structure, comprising a frame, a plurality of columns, a plurality of fixing nuts and a plurality of fixing components, each column is connected in the frame and the upper and lower ends of the column are respectively exposed outside the upper and lower ends of the frame, the upper and lower ends of the column are threadedly connected with fixing nuts, one end of the fixing nut close to the frame is against the frame, the fixing nut comprises at least three splicing pieces separated along the circumference of the fixing nut, the plurality of splicing pieces are respectively threadedly connected to the columns and spliced ​​to form the fixing nut, and the plurality of splicing pieces are fixed by the fixing components.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic devices, in particular to a high-tension column pull rod structure of a hydraulic device. Background Art

[0002] Hydraulic devices are mainly used for press forming. Taking the hydraulic device used for wheel hub processing as an example, it mainly includes a frame, an upper beam plate, an upper die, a lower die, a lower beam plate and several columns. The upper beam plate, the upper die, the lower die and the lower beam plate are all arranged in the frame, wherein the upper die and the lower die are located between the upper beam plate and the lower beam plate, and several columns are connected to the frame and the upper and lower ends are exposed outside the frame. The two ends of the column are fixed to the frame by nuts to form a column tie rod structure. The pressure generated on the raw material when the upper and lower dies are closed causes the raw material to deform and form a wheel hub. During the pressurization process, the reaction force generated by the upper and lower dies mainly acts on the column tie rod. For some large hydraulic devices, the pressure generated during the press forming process is very large. Correspondingly, the column also needs to withstand greater tension. In order to meet the strength requirements, the column diameter in such large hydraulic devices is also very large. The column and the frame are generally fixed by nuts. As the diameter of the column increases, the diameter of the nut also increases accordingly. However, it is very laborious to thread a large-diameter nut with a large-diameter column, which makes the connection more difficult. Summary of the invention

[0003] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a hydraulic device high-tension column tie rod structure to solve the technical problem that it is difficult to thread a large-diameter nut with a large-diameter column in the high-tension column tie rod structure in the prior art.

[0004] In order to solve the above technical problems, the present invention provides a hydraulic device high-tension column pull rod structure, including a frame, a plurality of columns, a plurality of fixing nuts and a plurality of fixing components, each column is connected to the frame and the upper and lower ends of the column are respectively exposed outside the upper and lower ends of the frame, the upper and lower ends of the column are threadedly connected with fixing nuts, one end of the fixing nut close to the frame is against the frame, and the fixing nut includes at least three splicing pieces separated along the circumference of the fixing nut, all the splicing pieces are respectively threadedly connected to the columns and spliced ​​to form a fixing nut, and two adjacent splicing pieces are fixed by a fixing component.

[0005] After adopting the above structure, a large-pull column tie rod structure of a hydraulic device of the present invention has the following advantages: the upper and lower ends of the column are connected and fixed to the frame by fixing nuts, wherein the fixing nuts include at least three splicing pieces, and each splicing piece has a thread on the inner surface. When connected to the frame, each splicing piece is connected to the column laterally from the threaded part of the column. A single splicing piece is easier to rotate when connected to the column. After each splicing piece is connected to the column, the connection between the fixing nut and the column can be realized, and then the fixing assembly is used to realize the fixation between the splicing pieces. The entire connection process is more time-saving and labor-saving, making the connection more convenient.

[0006] As an improvement, the column includes a column body and two connecting columns, the two connecting columns are coaxially arranged on the upper and lower end surfaces of the column body, the diameter of the connecting column is smaller than the diameter of the column body, the fixing nut includes a lower nut and an upper nut, the upper and lower ends of the column body are threadedly connected with the lower nut, the connecting columns are threadedly connected with the upper nut, the lower nut is located between the upper nut and the frame, the end of the lower nut away from the frame is against the upper nut, and the end of the lower nut close to the frame is against the frame, the upper nut is formed by circumferentially splicing at least three upper splicing pieces, and the lower nut is formed by circumferentially splicing at least three lower splicing pieces, and the two adjacent upper splicing pieces and the two adjacent lower splicing pieces are fixed by fixing components; by adopting this structure, the fixing nut is divided into an upper nut and a lower nut, which are respectively connected to the connecting column and the column body, and the upper nut and the lower nut are respectively spliced ​​by the upper splicing piece and the lower splicing piece, so that the whole connection process is more time-saving and labor-saving, and the connection is more convenient.

[0007] As an improvement, the upper and lower end faces of the column are provided with annular mounting holes arranged around the connecting column, the inner diameter of the mounting hole is the same as the outer diameter of the connecting column, and a protrusion is provided on the end face of each upper nut close to the frame, the protrusion is located in the mounting hole and is threadedly connected to the inner wall of the mounting hole; with this structure, the connection length between the upper nut and the column is increased through the mounting hole and the protrusion to meet the strength requirement under large tensile force, and at the same time, there is no need to increase the length of the column, so that the overall volume of the hydraulic device is smaller; in addition, since the largest quenching furnace in China can only quench columns with a maximum length of 24m, the above structure can shorten the overall height of the column to less than 24m, thereby reducing the quenching cost.

[0008] As an improvement, the fixing assembly includes a connecting pipe and a cover plate, the outer surfaces of the upper nut and the lower nut are both sleeved with the same connecting pipe, and the end surface on the connecting pipe and away from the frame and the end surface on the upper nut and away from the frame are both fixedly connected to the same cover plate by bolts; with this structure, the connecting pipe is sleeved outside the upper nut and the lower nut, so that each upper splicing piece and the lower splicing piece are fixed by the connecting pipe, and then the cover plate is used to connect with the connecting pipe and the upper nut respectively, thereby improving the stability of the connection between the upper nut, the lower nut and the column, the connecting pipe, and between each upper splicing piece and the lower splicing piece.

[0009] As an improvement, the outer walls of the upper nut and the lower nut are respectively the first inclined surface and the second inclined surface inclined outward toward the direction close to the frame, and the inner wall of the connecting tube is the third inclined surface parallel to the first inclined surface and the second inclined surface; with this structure, the setting of the first inclined surface, the second inclined surface and the third inclined surface can prompt each upper splicing piece and the lower splicing piece to move inward, making the connection between the upper nut, the lower nut and the column more stable, and also making the connection between the connecting tube and the upper nut, the lower nut tighter and more stable, while facilitating the disassembly of the connecting tube.

[0010] As an improvement, an annular groove is provided on the outer peripheral wall of the connecting pipe along the circumferential direction; with this structure, the groove is easy for tools to enter to facilitate the disassembly of the connecting pipe.

[0011] As an improvement, the end surface on the connecting pipe away from the frame exceeds the end surface on the upper nut away from the frame, a spacer is connected between the end surface on the upper nut away from the frame and the cover plate, and the bolt passes through the cover plate and the spacer and is threadedly connected to the upper nut; with this structure, there is a height difference between the connecting pipe and the upper nut, and the spacer can be provided to ensure a stable connection between the cover plate, the connecting pipe and the upper nut.

[0012] As an improvement, a first clamping groove and a second clamping groove are respectively provided on the outer wall of the upper nut and the outer wall of the lower nut, the first clamping groove is connected with the second clamping groove in the up and down direction, and a third clamping groove is provided on the inner wall of the connecting tube. The first clamping groove, the second clamping groove and the third clamping groove form a clamping cavity, and a limit strip is clamped in the clamping cavity; with this structure, the limit strip can prevent relative rotation between the upper nut, the lower nut and the connecting tube.

[0013] As an improvement, an annular groove is provided on the outer wall of the lower nut along the circumferential direction, and an iron wire is connected to the inner hoop of the annular groove; with this structure, on the basis of the fixed assembly, the various lower splicing parts of the lower nut are connected and fixed by the iron wire, which is convenient for installation.

[0014] As an improvement, the fixing nut includes four splicing pieces equally divided along the circumference of the fixing nut; this structure makes the connection between the fixing nut, the splicing pieces and the column more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the connection structure of the middle column, the lower nut, the upper nut and the fixing assembly of the present invention.

[0017] Figure 3 It is a top view of the upper nut part in the present invention.

[0018] : 1. frame; 2. column; 21. column; 22. connecting column; 3. lower nut; 31. lower splicing piece; 32. abutting surface; 4. upper nut; 41. upper splicing piece; 5. fixing assembly; 51. connecting pipe; 52. cover plate; 53. bolt; 6. mounting hole; 7. protrusion; 81. first inclined surface; 82. second inclined surface; 9. third inclined surface; 10. groove; 11. pad; 12. first slot; 13. second slot; 14. third slot; 15. limit strip; 16. annular groove; 17. first thread; 18. second thread; 19. support pipe; 20. cylinder fixing plate; 30. lower beam plate. DETAILED DESCRIPTION

[0019] A large-tension column tie rod structure of a hydraulic device according to the present invention will be described in detail below with reference to the accompanying drawings.

[0020] like Figures 1 to 3 As shown, a hydraulic device high-tension column pull rod structure includes a frame 1, a plurality of columns 2, a plurality of fixing nuts and a plurality of fixing components 5, each column 2 is connected to the frame 1 and the upper and lower ends of the column 2 are respectively exposed outside the upper and lower ends of the frame 1, the upper and lower ends of the column 2 are threadedly connected with fixing nuts, one end of the fixing nut close to the frame 1 is against the frame 1, the fixing nut includes at least three splicing pieces separated along the circumference of the fixing nut, all the splicing pieces are respectively threadedly connected to the column 2 and spliced ​​to form a fixing nut, and two adjacent splicing pieces are fixed by the fixing component 5.

[0021] like Figure 2As shown, the column 2 includes a column body 21 and two connecting columns 22. The column body 21 is connected in the frame 1 and its upper and lower ends are respectively exposed outside the upper and lower ends of the frame 1. The two connecting columns 22 are coaxially arranged on the upper and lower end surfaces of the column body 21. The diameter of the connecting column 22 is smaller than the diameter of the column body 21. The fixing nut includes a lower nut 3 and an upper nut 4. The upper and lower ends of the column body 21 are both threadedly connected with the lower nut 3, and the connecting columns 22 are both threadedly connected with the upper nut 4. The lower nut 3 is located between the upper nut 4 and the frame 1, and one end of the lower nut 3 away from the frame 1 abuts against the upper nut 4, and one end of the lower nut 3 close to the frame 1 abuts against the frame 1. The upper nut 4 is formed by circumferentially splicing at least three upper splicing pieces 41, and the lower nut 3 is formed by circumferentially splicing at least three lower splicing pieces 31. The two adjacent upper splicing pieces 41 and the two adjacent lower splicing pieces 31 are fixed by fixing components 5. The upper and lower end surfaces of the column 21 are both provided with an annular mounting hole 6 arranged around the connecting column 22, and the inner diameter of the mounting hole 6 is the same as the outer diameter of the connecting column 22. A protrusion 7 is provided on the end surface of each upper nut 4 close to the frame 1, and the protrusion 7 is located in the mounting hole 6 and is threadedly connected to the inner wall of the mounting hole 6. It should be noted that the inner diameter of the mounting hole 6 refers to the diameter close to the inner side of the mounting hole 6. In fact, the inner wall of the mounting hole 6 is the part of the connecting column 22 extending into the mounting hole 6. In this embodiment, the column 21 is formed by two coaxial inner and outer parts, wherein the two connecting columns 22 are respectively integrally formed inside the column 21 at the upper and lower ends.

[0022] The fixing nut includes four splicing parts equally divided along the circumference of the fixing nut, such as Figure 3 As shown, the upper nut 4 includes at least three upper splicing pieces 41 separated along the circumference of the upper nut 4, and in this embodiment, the upper nut 4 includes four upper splicing pieces 41 equally divided along the circumference of the upper nut 4, and the upper splicing pieces 41 are respectively threadedly connected to the column 2 and spliced ​​to form the upper nut 4. Similarly, the lower nut 3 also includes four equally divided lower splicing pieces 31, and the upper splicing pieces 41 and the lower splicing pieces 31 are fixed by a fixing assembly 5. In some other embodiments, the number of upper splicing pieces 41 can also be different from the number of lower splicing pieces 31.

[0023] like Figure 2As shown, the fixing assembly 5 includes a connecting tube 51 and a cover plate 52. The outer surfaces of the upper nut 4 and the lower nut 3 are both sleeved with the same connecting tube 51. The end surface of the connecting tube 51 away from the frame 1 and the end surface of the upper nut 4 away from the frame 1 are fixedly connected to the same cover plate 52 through bolts 53; the outer walls of the upper nut 4 and the lower nut 3 are respectively a first inclined surface 81 and a second inclined surface 82 inclined outwardly toward the frame 1, and the inner wall of the connecting tube 51 is a third inclined surface 9 parallel to the first inclined surface 81 and the second inclined surface 82. An annular groove 10 is provided on the outer peripheral wall of the connecting tube 51 along the circumferential direction; the end surface of the connecting tube 51 away from the frame 1 exceeds the end surface of the upper nut 4 away from the frame 1, and a pad 11 is connected between the end surface of the upper nut 4 away from the frame 1 and the cover plate 52, and the bolt 53 passes through the cover plate 52 and the pad 11 and is threadedly connected to the upper nut 4.

[0024] like Figure 2 As shown, a first card groove 12 and a second card groove 13 are respectively provided on the outer wall of the upper nut 4 and the outer wall of the lower nut 3, the first card groove 12 is connected with the second card groove 13 in the up and down direction, and a third card groove 14 is provided on the inner wall of the connecting tube 51. The first card groove 12, the second card groove 13 and the third card groove 14 form a card connection cavity, and a limiting strip 15 is carded in the card connection cavity. An annular groove 16 is circumferentially provided on the outer peripheral wall of the lower nut 3, and an iron wire is connected to the inner hoop of the annular groove 16.

[0025] The upper and lower ends of the column 2 are symmetrical structures. The structure of the upper end of the column 2 is described in detail below: the lower end surface of the lower nut 3 is against the upper end surface of the frame 1, that is, Figure 2 The upper nut 4 is located above the lower nut 3, and the upper end surface of the lower nut 3 abuts against the lower end surface of the upper nut 4, wherein the outer wall of the protrusion 7 is an inclined surface that is inclined from top to bottom and inward, and correspondingly, the inner wall of the mounting hole 6 on the outside is parallel to the inclined surface of the outer wall of the protrusion 7; the upper nut 4 is connected to the connecting column 22 through the first thread 17, and the lower nut 3 is connected to the column 21 through the second thread 18; the outer surfaces of the upper nut 4 and the lower nut 3 are both inclined surfaces that are inclined from top to bottom and outward, and the two are flush, that is, the first inclined surface 81 and the second inclined surface 82 The third inclined surface 9 of the inner wall of the connecting pipe 51 is the same, the upper end of the connecting pipe 51 is higher than the upper nut 4, a pad 11 is arranged on the upper end surface of the upper nut 4, the cover plate 52 is connected to the top ends of the connecting pipe 51 and the upper nut 4, and is fixed to the connecting pipe 51 and the upper nut 4 respectively by bolts 53, and each upper splicing piece 41 is fixed to the cover plate 52 by bolts 53; wherein, when the bolts 53 of the cover plate 52 and the upper nut 4 are tightened, the connecting pipe 51 will be further lowered, so that the connection between the connecting pipe 51 and the upper nut 4 and the lower nut 3 will be tighter and more stable.

[0026] The upper and lower ends of the column 2 are connected and fixed to the frame 1 by the lower nut 3 and the upper nut 4, wherein the upper nut 4 includes at least three upper splicing pieces 41, and the lower nut 3 also includes at least three lower splicing pieces 31. The inner surface of each upper splicing piece 41 and the lower splicing piece 31 is provided with a thread. When connected to the frame 1, each upper splicing piece 41 and the lower splicing piece 31 are connected to the column 2 from the side of the threaded part of the column 2. It is easier to rotate when a single upper splicing piece 41 and the lower splicing piece 31 are connected to the column 2. After each upper splicing piece 41 and the lower splicing piece 31 are connected to the column 2, the connection between the fixing nut and the column 2 can be realized, and then the fixing assembly 5 is used to fix the upper splicing piece 41 and the lower splicing piece 31. The whole connection process is more time-saving and labor-saving, making the connection more convenient. In addition, after the fixing assembly 5 is installed, if Figure 1 As shown, the upper mold presses downward, and a gap will be generated between the upper end of the support tube 19 and the cylinder fixing plate 20, and between the lower end of the support tube 19 and the lower beam plate 30 due to the reaction force. At this time, the gap can be filled with a gasket or other structure to reduce the vibration generated during the operation of the equipment and balance the operation of the equipment.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned one embodiment, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

Claims

1. A hydraulic device with a large pulling force column rod structure, characterized in that: The invention comprises a frame (1), a plurality of columns (2), a plurality of fixing nuts and a plurality of fixing components (5), wherein each of the columns (2) is connected to the frame (1) and the upper and lower ends of the columns (2) are respectively exposed outside the upper and lower ends of the frame (1), the upper and lower ends of the columns (2) are both threadedly connected to the fixing nuts, one end of the fixing nut close to the frame (1) abuts against the frame (1), the fixing nut comprises at least three splicing pieces separated along the circumference of the fixing nut, all of the splicing pieces are respectively threadedly connected to the columns (2) and spliced ​​to form the fixing nut, and two adjacent splicing pieces are fixed by the fixing components (5); The column (2) comprises a column body (21) and two connecting columns (22), the two connecting columns (22) being coaxially arranged on the upper and lower end surfaces of the column body (21), the diameter of the connecting column (22) being smaller than the diameter of the column body (21), the fixing nut comprising a lower nut (3) and an upper nut (4), the upper and lower ends of the column body (21) being threadedly connected to the lower nut (3), the connecting columns (22) being threadedly connected to the upper nut (4), the lower nut (3) being located between the upper nut (4) and the frame (1), one end of the lower nut (3) away from the frame (1) abuts against the upper nut (4), and one end of the lower nut (3) close to the frame (1) abuts against the frame (1), the upper nut (4) is formed by circumferentially splicing at least three upper splicing pieces (41), and the lower nut (3) is formed by circumferentially splicing at least three lower splicing pieces (31), and two adjacent upper splicing pieces (41) and two adjacent lower splicing pieces (31) are fixed by the fixing assembly (5); The upper and lower end surfaces of the column (21) are both provided with an annular mounting hole (6) arranged around the connecting column (22); the inner diameter of the mounting hole (6) is the same as the outer diameter of the connecting column (22); and a protrusion (7) is provided on the end surface of each upper nut (4) close to the frame (1); the protrusion (7) is located in the mounting hole (6) and is threadedly connected to the inner wall of the mounting hole (6).

2. The high-tension column tie rod structure of the hydraulic device according to claim 1, characterized in that: The fixing assembly (5) comprises a connecting tube (51) and a cover plate (52); the outer surfaces of the upper nut (4) and the lower nut (3) are both sleeved with the same connecting tube (51); the end surface of the connecting tube (51) away from the frame (1) and the end surface of the upper nut (4) away from the frame (1) are both fixedly connected to the same cover plate (52) via bolts (53).

3. The high-tension column tie rod structure of the hydraulic device according to claim 2, characterized in that: The outer walls of the upper nut (4) and the lower nut (3) are respectively a first inclined surface (81) and a second inclined surface (82) inclined outwardly in a direction close to the frame (1), and the inner wall of the connecting pipe (51) is a third inclined surface (9) parallel to the first inclined surface (81) and the second inclined surface (82).

4. The high-tension column tie rod structure of the hydraulic device according to claim 2, characterized in that: An annular groove (10) is provided on the outer peripheral wall of the connecting pipe (51) along the circumferential direction.

5. The high-tension column tie rod structure of the hydraulic device according to claim 2, characterized in that: An end surface of the connecting pipe (51) that is away from the frame (1) exceeds an end surface of the upper nut (4) that is away from the frame (1); a cushion block (11) is connected between the end surface of the upper nut (4) that is away from the frame (1) and the cover plate (52); and the bolt (53) passes through the cover plate (52) and the cushion block (11) and is threadedly connected to the upper nut (4).

6. The high-tension column tie rod structure of the hydraulic device according to claim 2, characterized in that: A first clamping groove (12) and a second clamping groove (13) are respectively provided on the outer wall of the upper nut (4) and the outer wall of the lower nut (3); the first clamping groove (12) and the second clamping groove (13) are communicated with each other in the up-down direction; a third clamping groove (14) is provided on the inner wall of the connecting tube (51); the first clamping groove (12), the second clamping groove (13) and the third clamping groove (14) form a clamping cavity; a limit strip (15) is clamped in the clamping cavity.

7. The high-tension column tie rod structure of the hydraulic device according to claim 2, characterized in that: An annular groove (16) is provided on the outer peripheral wall of the lower nut (3) along the circumferential direction, and an iron wire is connected to the inner hoop of the annular groove (16).

8. The high-tension column tie rod structure of the hydraulic device according to claim 1, characterized in that: The fixing nut includes four splicing pieces equally divided along the circumference of the fixing nut.

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