Large-tension stand column pull rod structure for hydraulic device

Abstract

The invention provides a large-tension stand column pull rod structure for a hydraulic device, relates to the technical field of hydraulic devices, and aims to solve the technical problem that a large-diameter stand column of a large hydraulic device in the prior art cannot meet the strength requirement under large tension due to small effective quenching thickness. A large-tension stand column pull rod structure for a hydraulic device comprises a rack, a plurality of stand columns and a plurality of fixing assemblies, each stand column comprises an inner core and a sleeve, the inner core is inserted into the sleeve, each stand column is connected into the rack, and the upper end and the lower end of the inner core and the upper end and the lower end of the sleeve are exposed out of the upper end and the lower end of the rack respectively. The upper end and the lower end of the inner core and the upper end and the lower end of the sleeve are fixed to the machine frame through fixing assemblies, the inner core and the inner surface and the outer surface of the sleeve are quenched respectively, then the inner core is inserted into the sleeve to form a stand column structure, and the quenching thickness of the stand column is the sum of the quenching thickness of the sleeve inner layer, the sleeve outer layer and the inner core outer layer. The strength of the upright is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic devices, in particular to a high-tension column pull rod structure used for hydraulic devices. 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. 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, so the column needs to be quenched to achieve sufficient strength. However, for some large hydraulic devices, the pressure generated during the pressing process is very large. Correspondingly, the column also needs to withstand greater tensile force. In order to meet the strength requirements, the diameter of the column in such large hydraulic devices is also very large. When quenching large-diameter columns, only a certain thickness of the column surface can be effectively quenched, which results in the strength of the large-diameter column being unable to meet the requirements of large tensile force. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high-tension column tie rod structure for a hydraulic device, so as to solve the technical problem that large-diameter columns of large hydraulic devices in the prior art cannot meet the strength requirements under high tension due to the small effective quenching thickness.

[0004] In order to solve the above technical problems, the present invention provides a high-tension column pull rod structure for a hydraulic device, including a frame, a plurality of columns and a plurality of fixing components, each column including an inner core and a sleeve, the inner core is inserted in the sleeve, each column is connected to the frame and the upper and lower ends of the inner core and the upper and lower ends of the sleeve are respectively exposed outside the upper and lower ends of the frame, and the upper and lower ends of the inner core and the upper and lower ends of the sleeve are fixed to the frame through fixing components.

[0005] After adopting the above structure, the high-tension column pull rod structure for the hydraulic device of the present invention has the following advantages: the column structure in the traditional hydraulic device is divided into two parts: the inner core and the sleeve, the inner and outer surfaces of the inner core and the sleeve are quenched respectively, and then the inner core is inserted into the sleeve to form a column structure, and the improved column quenching thickness is the sum of the quenching thickness of the inner layer of the sleeve, the outer layer of the sleeve and the outer layer of the inner core, which greatly improves the effective quenching thickness of the column, improves the strength of the column, makes the column strength meet the demand of large tension, and realizes a stable connection between the column and the frame through the fixing component.

[0006] As an improvement, the fixing assembly includes a lower nut and an upper nut, the upper and lower ends of the inner core are respectively exposed outside the upper and lower ends of the sleeve, the upper and lower ends of the sleeve are threadedly connected with the lower nut, one end of each lower nut facing the frame is against the surface of the frame, and the upper and lower ends of the inner core are threadedly connected with the upper nut, one end of each upper nut close to the lower nut is against the lower nut; using this structure, the split column and the frame are fixed by the lower nut and the upper nut, so that the column and the frame are stably connected.

[0007] As an improvement, mounting holes are provided on the inner circle of the upper end face and the lower end face of the sleeve, and a protrusion is provided on the end face of each upper nut close to the sleeve, the protrusion is located in the mounting hole and is threadedly connected to the inner core; with this structure, the length of the threaded connection between the upper nut and the inner core is increased by providing the mounting holes and the protrusions to meet the strength requirements of the connection structure, and this structure does not require the length of the inner core to be lengthened, 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 length of 24m at most, 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 also includes a connecting tube and a cover plate, the outer surfaces of the upper nut and the lower nut are both sleeved with the same connecting tube, and the end surface on the connecting tube away from the frame and the end surface on the upper nut away from the frame are fixedly connected to the same cover plate by bolts; with this structure, the upper nut and the lower nut are further fixed by the connecting tube and the cover plate, thereby improving the stability of the overall structure.

[0009] As an improvement, the outer surfaces of the upper nut and the lower nut are respectively a first inclined surface and a second inclined surface inclined outward toward the direction close to the frame, and the inner surface of the connecting tube is a 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 facilitates the separation of the connecting tube from the upper nut and the lower nut.

[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, a disassembly tool can be placed in the groove to facilitate 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, the present invention also includes a support tube, a cylinder fixing plate and a lower beam plate, and pads are provided between the upper end of the support tube and the cylinder fixing plate, and between the lower end of the support tube and the lower beam plate; this structure is adopted to reduce the vibration generated during the operation of the equipment to balance the operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 It is a schematic diagram of the connection structure between the column and the fixing assembly in the present invention.

[0015] Figure numerals: 1, frame; 2, column; 21, inner core; 211, first quenching layer; 22, sleeve; 221, second quenching layer; 222, third quenching layer; 3, fixing assembly; 31, lower nut; 311, abutment surface; 32, upper nut; 33, connecting pipe; 34, cover plate; 35, bolt; 4, mounting hole; 5, protrusion; 61, first inclined surface; 62, second inclined surface; 7, third inclined surface; 8, groove; 9, first thread; 10, second thread; 11, support pipe; 12, cylinder fixing plate; 13, lower beam plate. DETAILED DESCRIPTION

[0016] A large-tension column tie rod structure for a hydraulic device of the present invention is described in detail below with reference to the accompanying drawings.

[0017] like Figure 1 to Figure 2 As shown, a high-tension column pull rod structure for a hydraulic device includes a frame 1, a plurality of columns 2 and a plurality of fixing components 3, each column 2 includes an inner core 21 and a sleeve 22, the inner core 21 is inserted in the sleeve 22, each column 2 is connected to the frame 1, and the upper and lower ends of the inner core 21 and the upper and lower ends of the sleeve 22 are respectively exposed outside the upper and lower ends of the frame 1, and the upper and lower ends of the inner core 21 and the upper and lower ends of the sleeve 22 are fixed to the frame 1 through the fixing components 3, that is, the upper and lower ends of the inner core 21 are respectively exposed outside the upper and lower ends of the frame 1, and are respectively fixed to the frame 1 by a fixing component 3, the upper and lower ends of the sleeve 22 are respectively exposed outside the upper and lower ends of the frame 1, and are respectively fixed to the frame 1 by a fixing component 3, and the upper end of the inner core 21 and the upper end of the sleeve 22 are fixed by the same fixing component 3, and similarly, the lower end of the inner core 21 and the lower end of the sleeve 22 are fixed by the same fixing component 3, and there are two upper and lower fixing components 3 on one column 2.

[0018] like Figure 2As shown, the fixing assembly 3 includes a lower nut 31, an upper nut 32, a connecting pipe 33 and a cover plate 34. The upper and lower ends of the inner core 21 are respectively exposed outside the upper and lower ends of the sleeve 22, that is, the upper end of the inner core 21 is higher than the sleeve 22, and the lower end of the inner core 21 is lower than the sleeve 22; the upper and lower ends of the sleeve 22 are both threadedly connected with the lower nut 31, and one end of each lower nut 31 facing the frame 1 abuts against the surface of the frame 1, and the upper and lower ends of the inner core 21 are both threadedly connected with the upper nut 32, and one end of each upper nut 32 close to the lower nut 31 abuts against the lower nut 31; the upper end surface and the inner circle of the lower end surface of the sleeve 22 are both provided with mounting holes 4 , each upper nut 32 is provided with a protrusion 5 on the end surface close to the sleeve 22, the protrusion 5 is located in the mounting hole 4 and is threadedly connected to the inner core 21; the upper nut 32 and the lower nut 31 are both sleeved with the same connecting pipe 33 on the outer surface, the end surface of the connecting pipe 33 away from the frame 1 and the end surface of the upper nut 32 away from the frame 1 are fixedly connected to the same cover plate 34 through bolts 35, the outer surfaces of the upper nut 32 and the lower nut 31 are respectively the first inclined surface 61 and the second inclined surface 62 inclined outwardly in the direction close to the frame 1, and the inner surface of the connecting pipe 33 is a third inclined surface 7 parallel to the first inclined surface 61 and the second inclined surface 62. The end surface of the connecting pipe 33 away from the frame 1 exceeds the end surface of the upper nut 32 away from the frame 1, and a pad is connected between the end surface of the upper nut 32 away from the frame 1 and the cover plate 34, and the bolt 35 passes through the cover plate 34 and the pad and is threadedly connected to the upper nut 32. An annular groove 8 is provided on the outer peripheral wall of the connecting pipe 33 along the circumferential direction.

[0019] The following is a specific description of the structure of the fixing assembly 3 at the upper end of the column 2: the lower end of the lower nut 31 abuts against the upper end surface of the frame 1, that is, Figure 2The abutting surface 311 shown is abutted against the upper end surface of the frame 1, and the upper nut 32 is located above the lower nut 31 and the lower end of the upper nut 32 is abutted against the upper end of the lower nut 31, the upper nut 32 is threadedly connected to the inner core 21 through the first thread 9, and the lower nut 31 is threadedly connected to the sleeve 22 through the second thread 10, and a protrusion 5 is arranged at the lower end of the upper nut 32 to extend into the mounting hole 4, and the upper end of the lower nut 31 is slightly higher than the upper end of the sleeve 22 so that there is a gap between the upper end of the sleeve 22 and the upper nut 32, and the outer wall of the protrusion 5 is an inclined surface inclined from top to bottom and inward, the inner wall of the mounting hole 4 is parallel to the inclined surface of the outer wall of the protrusion 5, and there is also a gap between the inner wall of the mounting hole 4 and the outer wall of the protrusion 5; the upper nut 32 The outer wall and the outer wall of the lower nut 31 are both inclined surfaces that are inclined from top to bottom and outward, and the outer walls of the two are flush, that is, the first inclined surface 61 is flush with the second inclined surface 62, and the inner wall of the connecting pipe 33 is the same. The upper end of the connecting pipe 33 is higher than the upper nut 32, and a pad is set on the upper end surface of the upper nut 32. The cover plate 34 is connected to the top ends of the connecting pipe 33 and the upper nut 32, and is fixed to the connecting pipe 33 and the upper nut 32 with bolts 35 respectively. When the bolts 35 of the cover plate 34 and the upper nut 32 are tightened, the connecting pipe 33 moves further downward, and under the action of the first inclined surface 61, the second inclined surface 62 and the third inclined surface 7, the connection between the connecting pipe 33 and the upper nut 32 and the lower nut 31 is tighter and more stable.

[0020] In the present invention, the column 2 structure in the traditional hydraulic device is divided into two parts: the inner core 21 and the sleeve 22. The inner and outer surfaces of the inner core 21 and the sleeve 22 are quenched respectively, and then the inner core 21 is inserted into the sleeve 22 to form the column 2 structure. The quenching thickness of the improved column 2 is the sum of the quenching thickness of the inner layer of the sleeve 22, the outer layer of the sleeve 22 and the outer layer of the inner core 21. Figure 2 The second quenching layer 221 of the inner layer of the sleeve 22, the third quenching layer 222 of the outer layer of the sleeve 22, and the first quenching layer 211 of the outer layer of the inner core 21 greatly increase the effective quenching thickness of the column 2, and improve the strength of the column 2, so that the strength of the column 2 meets the requirements of large tensile force, and the column 2 and the frame 1 are stably connected through the fixing component 3; after the fixing component 3 is installed, as shown Figure 1 As shown, when the upper mold is pressed downward, gaps will be generated between the upper end of the support tube 11 and the cylinder fixing plate 12, and between the lower end of the support tube 11 and the lower beam plate 13 due to the reaction force. At this time, pads or gaskets are used to fill the gaps to reduce the vibration generated during the operation of the equipment and balance the operation of the equipment.

[0021] 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 high-tension column tie rod structure for a hydraulic device, characterized in that: The invention comprises a frame (1), a plurality of columns (2) and a plurality of fixing components (3), wherein each column (2) comprises an inner core (21) and a sleeve (22), wherein the inner core (21) is inserted into the sleeve (22), and each column (2) is connected to the frame (1), and the upper and lower ends of the inner core (21) and the upper and lower ends of the sleeve (22) are respectively exposed outside the upper and lower ends of the frame (1), and the upper and lower ends of the inner core (21) and the upper and lower ends of the sleeve (22) are fixed to the frame (1) via the fixing component (3).

2. The high-tension column tie rod structure for a hydraulic device according to claim 1, characterized in that: The fixing assembly (3) comprises a lower nut (31) and an upper nut (32); the upper and lower ends of the inner core (21) are respectively exposed outside the upper and lower ends of the sleeve (22); the upper and lower ends of the sleeve (22) are both threadedly connected to the lower nut (31); one end of each lower nut (31) facing the frame (1) abuts against the surface of the frame (1); the upper and lower ends of the inner core (21) are both threadedly connected to the upper nut (32); one end of each upper nut (32) close to the lower nut (31) abuts against the lower nut (31).

3. The high-tension column tie rod structure for a hydraulic device according to claim 2, characterized in that: The upper end surface and the inner circle of the lower end surface of the sleeve (22) are both provided with mounting holes (4), and each upper nut (32) is provided with a protrusion (5) on its end surface close to the sleeve (22), and the protrusion (5) is located in the mounting hole (4) and is threadedly connected to the inner core (21).

4. The high-tension column tie rod structure for a hydraulic device according to claim 2, characterized in that: The fixing assembly (3) further comprises a connecting tube (33) and a cover plate (34); the outer surfaces of the upper nut (32) and the lower nut (31) are both sleeved with the same connecting tube (33); and the end surface of the connecting tube (33) away from the frame (1) and the end surface of the upper nut (32) away from the frame (1) are both fixedly connected to the same cover plate (34) via bolts (35).

5. The high-tension column tie rod structure for a hydraulic device according to claim 4, characterized in that: The outer surfaces of the upper nut (32) and the lower nut (31) are respectively a first inclined surface (61) and a second inclined surface (62) inclined outwardly in a direction close to the frame (1), and the inner surface of the connecting pipe (33) is a third inclined surface (7) parallel to the first inclined surface (61) and the second inclined surface (62).

6. The high-tension column tie rod structure for a hydraulic device according to claim 4, characterized in that: An annular groove (8) is provided on the outer peripheral wall of the connecting pipe (33) along the circumferential direction.

7. The high-tension column tie rod structure for a hydraulic device according to claim 4, characterized in that: An end surface of the connecting pipe (33) that is away from the frame (1) exceeds an end surface of the upper nut (32) that is away from the frame (1); a cushion block is connected between the end surface of the upper nut (32) that is away from the frame (1) and the cover plate (34); and the bolt (35) passes through the cover plate (34) and the cushion block and is threadedly connected to the upper nut (32).

8. The high-tension column tie rod structure for a hydraulic device according to claim 1, characterized in that: It also comprises a support tube (11), a cylinder fixing plate (12) and a lower beam plate (13), wherein a cushion block is provided between the upper end of the support tube (11) and the cylinder fixing plate (12), and between the lower end of the support tube (11) and the lower beam plate (13).

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