CN207500391U - The buffer unit of hydraulic press - Google Patents

Abstract

The utility model discloses a buffer device for a hydraulic machine. A lower beam is arranged above the base, a plurality of support columns are evenly arranged between the base and the lower beam, and a guide column is arranged at the upper end of each support column. The outer wall of the guide column Shock-absorbing springs are set, buffer cylinders are embedded on both sides of the upper end of the lower beam, a piston is installed in the cylinder body, and an oil return groove is arranged on the side wall of the piston along the axial direction. The upper end of the piston is connected with the piston rod, and the piston rod The upper end protrudes from the cylinder head, and a buffer spring for supporting the piston and piston rod is installed in the rodless chamber of the buffer cylinder; a lower workbench is arranged on the upper end of the lower beam and between the two buffer cylinders, and a The upper workbench is installed on the lower end surface of the moving beam, the upper beam is arranged above the moving beam, the hydraulic cylinder is installed on the bottom of the upper beam, and the telescopic rod of the hydraulic cylinder is connected with the moving beam. The utility model has a simple structure and solves the problems of poor cushioning performance and low service life of the hydraulic press in the prior art.

Description

Buffer device for hydraulic press

technical field

The utility model belongs to the technical field of hydraulic machinery equipment and relates to a buffer device of a hydraulic machine.

Background technique

The hydraulic press converts hydraulic energy into mechanical energy and performs linear reciprocating motion, which is widely used in production and processing; however, the existing hydraulic presses have poor buffer performance during use, and the speed of the moving beam is relatively high during the downward movement. When in contact with the lower workbench, it is easy to generate a large impact force on the lower workbench, resulting in damage to the lower workbench; the lower beam of the hydraulic press is rigidly connected to the base, and the lower beam needs to bear a large load during the processing of the workpiece. The pressure is easy to cause damage to the lower beam and reduce the service life of the equipment.

Utility model content

In order to achieve the above purpose, the utility model provides a buffer device for a hydraulic machine, which has a simple structure and solves the problems of poor buffer performance and low service life of the hydraulic machine in the prior art.

The technical solution adopted by the utility model is a buffer device for a hydraulic machine, a lower beam is arranged above the base, a plurality of support columns are evenly arranged between the base and the lower beam, and a guide column is provided at the upper end of each support column , the outer wall of the guide column is provided with a damping spring, the lower end of the damping spring is connected with the support column, the upper end of the damping spring is connected with the lower beam, and the bottom of the lower beam is provided with a circular groove at the position corresponding to the guide column , the upper end of the guide column extends into the groove and there is a buffer gap between the top of the groove and the diameter of the groove is smaller than the diameter of the guide column; both sides of the upper end of the lower beam are embedded with buffer cylinders, and the lower end of the cylinder body of the buffer cylinder Closed, the upper end of the cylinder is provided with a cylinder cover, the cylinder cover is provided with a one-way valve, the cylinder is provided with a piston, the side wall of the piston is provided with an oil return groove along the axial direction, the upper end of the piston is connected with the piston rod, and the piston rod The upper end protrudes from the cylinder head, and a buffer spring is installed in the rodless cavity of the buffer cylinder. The lower end of the buffer spring is connected with the bottom of the cylinder body, and the upper end of the buffer spring is connected with the bottom of the piston; There is a lower workbench, the height of which is lower than that of the unpressurized piston rod, and the height of the cylinder head of the buffer cylinder is lower than that of the lower workbench; an upper workbench is provided directly above the lower workbench, and the upper workbench The bottom of the table and the position corresponding to the piston rod are provided with rubber pads. The upper workbench is installed on the lower end surface of the moving beam. There is an upper beam above the moving beam. The cylinder is installed at the bottom of the upper beam, and the telescopic rod of the hydraulic cylinder is connected with the moving beam.

The utility model is also characterized in that, further, the check valve is connected to the oil tank through an oil pipe.

Further, the hydraulic cylinder is connected to the oil station through an oil pipe.

The beneficial effects of the utility model are: when the telescopic rod of the hydraulic cylinder drives the moving beam and the upper workbench moves downward, the rubber pad at the bottom of the upper workbench first contacts the piston rod, and the piston rod moves downward under the action of the upper workbench , compress the hydraulic oil and the buffer spring in the rodless cavity, the buffer spring consumes part of the energy of the downward movement of the piston rod after being compressed and deformed, and at the same time, the upward movement of the hydraulic oil along the oil return groove produces resistance to the continuous downward movement of the piston rod, reducing the upward movement. The falling speed of the workbench reduces the impact force when the upper workbench contacts the lower workbench, reduces damage to the equipment and prolongs the service life.

After the workpiece is processed, the upper table moves upward under the action of the hydraulic cylinder, the buffer spring recovers its elastic deformation, and the hydraulic oil moves down along the oil return groove and flows back into the rodless cavity; the bottom of the lower beam, corresponding to the guide column There is a circular groove at the position, and there is a buffer gap between the upper end of the guide post and the groove. The diameter of the groove is smaller than the diameter of the guide post. The greater pressure generated during workpiece processing, the damping spring and the buffer gap With cooperation, it plays a buffering role, which can effectively reduce the force between the lower beam and the base, and prevent excessive pressure from damaging the lower beam. The shock-absorbing spring is sleeved on the outer wall of the guide column to improve the stability of the lower beam.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of an embodiment of the utility model.

In the figure, 1. Base, 2. Lower beam, 3. Lower workbench, 4. Upper workbench, 5. Moving beam, 6. Support column, 7. Guide column, 8. Damping spring, 9. Groove, 10. Cylinder block, 11. Cylinder head, 12. Piston, 13. Oil return tank, 14. Buffer spring, 15. Piston rod, 16. Check valve, 17. Rubber pad, 18. Hydraulic cylinder, 19. Upper beam, 20. Buffer cylinder.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The structure of the embodiment of the utility model, as shown in Figure 1, is provided with a lower beam 2 above the base 1, and a plurality of supporting columns 6 are uniformly arranged between the base 1 and the lower beam 2, and between two adjacent supporting columns 6 The distance is 10-20cm, and the upper end of each support column 6 is provided with a guide column 7, and the outer wall of the guide column 7 is provided with a shock absorbing spring 8, and the lower end of the shock absorbing spring 8 is connected with the support column 6. The upper end is connected with the lower beam 2, and the bottom of the lower beam 2 and the position corresponding to the guide column 7 are provided with a circular groove 9, and the upper end of the guide column 7 extends into the groove 9 and there is a buffer gap between the top of the groove 9 , the diameter of the groove 9 is smaller than the diameter of the guide column 7; both sides of the upper end of the lower beam 2 are embedded with a buffer cylinder 20, the lower end of the cylinder body 10 of the buffer cylinder 20 is closed, and the upper end of the cylinder body 10 is provided with a cylinder cover 11, The cylinder head 11 is provided with a check valve 16, the cylinder body 10 is provided with a piston 12, the side wall of the piston 12 is provided with an oil return groove 13 along the axial direction, the upper end of the piston 12 is connected with the piston rod 15, and the upper end of the piston rod 15 extends Out of the cylinder head 11, the buffer spring 14 for supporting the piston 12 and the piston rod 15 is installed in the rodless cavity of the buffer cylinder 20, the lower end of the buffer spring 14 is connected with the bottom of the cylinder body 10, and the upper end of the buffer spring 14 is connected with the bottom of the piston 12 connection; the upper end of the lower beam 2 and the lower workbench 3 are arranged between the two buffer cylinders 20, the height of the lower workbench 3 is lower than the height of the unpressurized piston rod 15, and the height of the cylinder head 11 of the buffer cylinder 20 is lower At the height of the lower workbench 3; the upper workbench 4 is provided directly above the lower workbench 3, the bottom of the upper workbench 4 and the position corresponding to the piston rod 15 are provided with a rubber pad 17, and the upper workbench 4 is installed on the moving beam 5, the top of the moving beam 5 is provided with an upper beam 19, the moving beam 5 is slidably connected with the body, the upper beam 19 is fixedly connected with the body, the hydraulic cylinder 18 is installed on the bottom of the upper beam 19, and the telescopic rod of the hydraulic cylinder 18 is connected with the body. The moving beam 5 is connected to drive the moving beam 5 to move up and down; the check valve 16 is connected to the oil tank through the oil pipe, and the hydraulic cylinder 18 is connected to the oil station through the oil pipe.

The working principle of the utility model embodiment: when in use, the workpiece is placed on the lower workbench 3, the telescopic rod of the hydraulic cylinder 18 drives the moving beam 5, and the upper workbench 4 moves downward, and the rubber pad 17 at the bottom of the upper workbench 4 First contact with the piston rod 15, the piston rod 15 moves downward under the action of the upper worktable 4, compressing the hydraulic oil in the rodless chamber and the buffer spring 14, the buffer spring 14 consumes part of the energy after being compressed and deformed, and the hydraulic oil moves back along the The upward movement of the oil tank 13 produces resistance to the continued downward movement of the piston rod 15, which reduces the falling speed of the upper worktable 4, reduces the impact force when the upper worktable 4 contacts the lower worktable 3, reduces the damage to the equipment, and prolongs the service life. Lifespan: After the workpiece is processed, the upper table 4 moves upward under the action of the hydraulic cylinder 18, the buffer spring 14 recovers elastic deformation, and the hydraulic oil moves downward along the oil return groove 13 and flows back into the rodless cavity; the lower beam 2 The bottom and the position corresponding to the guide post 7 are provided with a circular groove 9, there is a buffer gap between the upper end of the guide post 7 and the groove 9, and the diameter of the groove 9 is smaller than the diameter of the guide post 7; Larger pressure, with the cooperation of the damping spring 8 and the buffer gap, plays the role of buffering the lower beam 2, which can effectively reduce the force between the lower beam 2 and the base 1, and prevent excessive pressure from causing damage to the lower beam 2. damage, the damping spring 8 is sleeved on the outer wall of the guide column 7 to improve the stability of the lower beam 2.

It should be noted that, in this document, the terms "comprising", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. All modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model are included in the protection scope of the present utility model.

Claims (3)

1. A buffer device for a hydraulic press, characterized in that a lower beam (2) is provided above the base (1), and a plurality of support columns (6) are evenly provided between the base (1) and the lower beam (2), The upper end of each support column (6) is provided with a guide column (7), and the outer wall of the guide column (7) is provided with a shock absorbing spring (8), and the lower end of the shock absorbing spring (8) is connected with the support column (6) , the upper end of the damping spring (8) is connected with the lower beam (2), the bottom of the lower beam (2) is provided with a circular groove (9) at the position corresponding to the guide column (7), and the guide column (7) The upper end of the lower beam (2) extends into the groove (9) and there is a buffer gap between the top of the groove (9), the diameter of the groove (9) is smaller than the diameter of the guide column (7); both sides of the upper end of the lower beam (2) are embedded A buffer cylinder (20) is provided, and the lower end of the cylinder body (10) of the buffer cylinder (20) is closed, and the upper end of the cylinder body (10) is provided with a cylinder cover (11), and the cylinder cover (11) is provided with a one-way valve ( 16), the cylinder (10) is provided with a piston (12), the side wall of the piston (12) is provided with an oil return groove (13) along the axial direction, the upper end of the piston (12) is connected with the piston rod (15), and the piston rod The upper end of (15) stretches out cylinder cover (11), and buffer spring (14) is installed in the rodless chamber of buffer cylinder (20), and the lower end of buffer spring (14) is connected with the bottom of cylinder block (10), and buffer spring The upper end of (14) is connected with the bottom of the piston (12); the upper end of the lower beam (2) and the lower workbench (3) are arranged between the two buffer cylinders (20), and the height of the lower workbench (3) is lower than that of the lower beam (2). The height of the piston rod (15) under pressure, the height of the cylinder head (11) of the buffer cylinder (20) is lower than the height of the lower workbench (3); just above the lower workbench (3) is provided with an upper workbench ( 4), the bottom of the upper workbench (4) and the position corresponding to the piston rod (15) are provided with a rubber pad (17), the upper workbench (4) is installed on the lower end surface of the moving beam (5), and the moving beam (5) ) is provided with an upper beam (19), the moving beam (5) is slidingly connected with the body, the upper beam (19) is fixedly connected with the body, the hydraulic cylinder (18) is installed on the bottom of the upper beam (19), and the hydraulic cylinder (18 ) is connected with the moving beam (5). 2. A buffer device for a hydraulic machine according to claim 1, characterized in that the one-way valve (16) is connected to the oil tank through an oil pipe. 3. A buffer device for a hydraulic machine according to claim 1, characterized in that the hydraulic cylinder (18) is connected to an oil station through an oil pipe.