Electric oil cylinder for bending machine

Abstract

The utility model discloses an electric oil cylinder for a bending machine, which comprises a rear end cover, the rear end cover is arranged at one end of a cylinder body, a front end cover is arranged at the other end of the cylinder body, a piston rod is arranged in the cylinder body, and the piston rod is communicated with the front end cover; the gear motor assembly is arranged on one side of the rear end cover, a ball screw is arranged in the cylinder body, a connecting disc is arranged in the cylinder body, the connecting disc is arranged at one end of a piston rod, a nut piece is arranged in the center of the connecting disc, a first telescopic cavity is formed in the center of the interior of the piston rod, and a second telescopic cavity is formed in the center of the interior of the piston rod. One end of the ball screw penetrates through the nut piece and extends into the first telescopic cavity, a connecting disc is arranged at one end of the piston rod of the electric oil cylinder, the connecting disc is arranged in the cylinder body, the telescopic piston rod is limited, the extending piston rod is prevented from deviating, it is ensured that the piston rod stretches out and draws back stably, and the using effect of the electric oil cylinder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric cylinders, in particular to an electric cylinder for a bending machine. Background Art

[0002] With the rapid development of industrial automation and the rise of intelligent manufacturing, electric cylinders are developing in the direction of high efficiency and intelligence. Electric cylinders, also known as electric hydraulic cylinders, are devices that use electric motors to drive pistons in cylinders to generate thrust and achieve mechanical linear motion. They use electric motors as power sources and have higher energy conversion efficiency and lower energy consumption than the combination of internal combustion engines or motor-driven pumps in traditional hydraulic systems.

[0003] The Chinese patent publication number is CN212838716U, and the authorization announcement date is March 30, 2021. A new type of electric cylinder includes a cylinder body, a screw rod is installed in the cylinder body, one end of the screw rod is connected to a power source for driving it to rotate, and a nut is installed on the outer periphery of the other end of the screw rod, and one end of the nut is connected to a piston. The cylinder body is filled with oil for lubrication, and seals for sealing the cylinder body are respectively installed at both ends of the cylinder. The utility model designs the cylinder body so that the cylinder body is filled with lubricating oil. In actual working process, the mechanism in the cylinder body, such as screw rod, nut and other components, is always immersed in oil. Therefore, the friction coefficient between the parts is small, the wear is smaller, the rotation is smoother, the noise is smaller, the service life is longer, and the cylinder is sealed, and external impurities will not enter the cylinder, so the internal oil does not need to be replaced frequently, and it is easy to use.

[0004] The piston rod of the existing electric cylinder has no limiting structure. The unbalanced force on one end of the telescopic piston rod will cause the piston rod to deviate, which can easily cause the piston rod to bend, reduce the use effect of the electric cylinder, and cannot meet the use requirements. Utility Model Content

[0005] The purpose of the utility model is to provide an electric cylinder for a bending machine, so as to solve the problem proposed in the above background technology that the piston rod of the existing electric cylinder has no limiting structure, and the unbalanced force on one end of the telescopic piston rod will cause the piston rod to deviate, which can easily cause the piston rod to bend, thereby reducing the use effect of the electric cylinder and failing to meet the use requirements.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an electric cylinder for a bending machine, comprising a cylinder body, and also comprising:

[0007] A rear end cover is arranged at one end of the cylinder body, a front end cover is arranged at the other end of the cylinder body, and the rear end cover and the front end cover are connected to the cylinder body by screws, a piston rod is arranged inside the cylinder body, the piston rod and the front end cover are arranged through, and the piston rod and the front end cover are slidably connected;

[0008] A reduction motor assembly is arranged on one side of the rear end cover, and the reduction motor assembly and the rear end cover are connected by screws. A ball screw is arranged inside the cylinder body, and one end of the ball screw is connected to the output end of the reduction motor assembly. A connecting disk is arranged inside the cylinder body, and the connecting disk is slidably connected to the cylinder body. The connecting disk is arranged at one end of the piston rod, and the connecting disk is fixedly connected to the piston rod. A nut piece is arranged at the center of the connecting disk, and the nut piece is fixedly connected to the connecting disk. A first telescopic cavity is arranged at the center of the piston rod, one end of the ball screw penetrates the nut piece and extends to the inside of the first telescopic cavity, and the ball screw is threadedly connected to the nut piece.

[0009] Preferably, sealing rings are provided at the contact points between the rear end cover and the front end cover and the cylinder body, and the sealing rings are in close contact with the cylinder body, the rear end cover and the front end cover.

[0010] Preferably, a slide groove is provided on the inner wall of the cylinder body, and there are four slide grooves. A slider is provided on the outside of the connecting disk, and there are four sliders. The slider is fixedly connected to the connecting disk. The four sliders are equidistantly arranged outside the connecting disk, and the sliders are arranged corresponding to the slide grooves.

[0011] Preferably, a first dynamic seal is provided at the contact point between the piston rod and the front end cover, a first oil seal is provided on one side of the first dynamic seal, and the first dynamic seal and the first oil seal are connected as a whole with the front end cover, the first dynamic seal and the first oil seal are both provided on the outside of the piston rod, and the first dynamic seal and the first oil seal are in contact with the piston rod.

[0012] Preferably, a second dynamic seal is provided at the contact point between the ball screw and the rear end cover, a second oil seal is provided on one side of the second dynamic seal, and the second dynamic seal and the second oil seal are connected to the rear end cover as a whole, the second dynamic seal and the second oil seal are both provided on the outside of the ball screw, and the second dynamic seal and the second oil seal are in contact with the ball screw.

[0013] Preferably, a refueling hole is provided on the cylinder body, an oil plug is provided on the outside of the cylinder body, the oil plug is provided corresponding to the refueling hole, and the oil plug is threadedly connected to the cylinder body, and a through hole is provided on the connecting plate, six through holes are provided, and the six through holes are equidistantly arranged in a circle on the connecting plate.

[0014] Preferably, a second telescopic cavity is provided at the center of the ball screw, a guide rod is provided inside the first telescopic cavity, and one end of the guide rod is fixedly connected to the piston rod, the other end of the guide rod extends to the inside of the second telescopic cavity, and the guide rod is slidably connected to the ball screw.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model device is provided with a cylinder body, a piston rod, a reduction motor assembly, a connecting plate, a ball screw and a nut. The piston rod is telescopically connected to the cylinder body. The reduction motor assembly drives the ball screw to rotate. The ball screw is threadedly connected to the nut. As the ball screw rotates, the piston rod is pushed and pulled, and the piston rod is pushed out of the cylinder body, or the piston rod is put into the cylinder body, so as to realize the telescopic function of the electric oil cylinder;

[0017] 2. The utility model device is provided with an oil plug, a through hole and a filling hole. The oil plug is opened to add lubricating oil from the filling hole to the inside of the cylinder body, so as to lubricate the parts in the cylinder body and reduce sliding resistance. The through hole enables the lubricating oil to flow on both sides of the connecting plate. When the connecting plate telescopes and moves in the cylinder body, the lubricating oil at both ends flows, so as to better lubricate and increase the service life of the electric cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 This is a structural diagram of the connection between the connecting plate, the cylinder body and the ball screw of the utility model;

[0021] Figure 4 For the utility model Figure 2 A partial enlarged view of area A;

[0022] Figure 5 For the utility model Figure 2 A partial enlarged view of area B;

[0023] Figure 6 For the utility model Figure 2 A partial enlarged view of area C.

[0024] In the figure: 1. cylinder body; 2. rear end cover; 3. front end cover; 4. oil plug; 5. piston rod; 6. reduction motor assembly; 7. connecting plate; 8. slide groove; 9. slider; 10. ball screw; 11. first telescopic chamber; 12. guide rod; 13. second telescopic chamber; 14. through hole; 15. nut; 16. oil filling hole; 17. sealing ring; 18. first dynamic seal; 19. first oil seal; 20. second dynamic seal; 21. second oil seal. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] See also Figure 1-6 The utility model provides an embodiment: an electric cylinder for a bending machine, comprising a cylinder body 1, and also comprising:

[0027] A rear end cover 2 is arranged at one end of the cylinder body 1, and a front end cover 3 is arranged at the other end of the cylinder body 1, and the rear end cover 2 and the front end cover 3 are connected to the cylinder body 1 by screws. A piston rod 5 is arranged inside the cylinder body 1, and the piston rod 5 is arranged through the front end cover 3, and the piston rod 5 is slidably connected to the front end cover 3;

[0028] A reduction motor assembly 6 is arranged on one side of the rear end cover 2, and the reduction motor assembly 6 is connected to the rear end cover 2 by screws. A ball screw 10 is arranged inside the cylinder body 1, and one end of the ball screw 10 is connected to the output end of the reduction motor assembly 6. A connecting disk 7 is arranged inside the cylinder body 1, and the connecting disk 7 is slidably connected to the cylinder body 1. The connecting disk 7 is arranged at one end of the piston rod 5, and the connecting disk 7 is fixedly connected to the piston rod 5. A nut member 15 is arranged at the center of the connecting disk 7, and the nut member 15 is fixedly connected to the connecting disk 7. A first telescopic chamber 11 is arranged at the center of the piston rod 5, one end of the ball screw 10 passes through the nut member 15 and extends to the inside of the first telescopic chamber 11, and the ball screw 10 is threadedly connected to the nut member 15.

[0029] When in use: turn on the reduction motor assembly 6 to drive the ball screw 10 to rotate, the ball screw 10 is threadedly connected to the nut 15, and as the ball screw 10 rotates, the piston rod 5 is pushed and pulled, the piston rod 5 is pushed out of the cylinder body 1, or the piston rod 5 is put into the cylinder body 1.

[0030] See also Figure 1 and Figure 2 A sealing ring 17 is provided at the contact point between the rear end cover 2 and the front end cover 3 and the cylinder body 1, and the sealing ring 17 is in contact with the cylinder body 1, the rear end cover 2 and the front end cover 3, and the sealing ring 17 ensures the sealing connection between the rear end cover 2 and the front end cover 3 and the cylinder body 1.

[0031] See also Figure 2 , Figure 3 and Figure 4 A slide groove 8 is arranged on the inner wall of the cylinder body 1, and there are four slide grooves 8. A slider 9 is arranged outside the connecting disk 7, and there are four sliders 9, and the slider 9 is fixedly connected to the connecting disk 7. The four sliders 9 are arranged equidistantly outside the connecting disk 7, and the sliders 9 and the slide grooves 8 are arranged correspondingly. The sliders 9 and the slide grooves 8 play a guiding and limiting role for the moving connecting disk 7, ensuring that the piston rod 5 is smoothly extended and retracted, thereby improving the operating stability of the electric cylinder.

[0032] See also Figure 2 and Figure 5 A first dynamic seal 18 is provided at the contact point between the piston rod 5 and the front end cover 3, a first oil seal 19 is provided on one side of the first dynamic seal 18, and the first dynamic seal 18 and the first oil seal 19 are connected to the front end cover 3 as a whole, the first dynamic seal 18 and the first oil seal 19 are both provided on the outside of the piston rod 5, and the first dynamic seal 18 and the first oil seal 19 are in contact with the piston rod 5, and the first dynamic seal 18 and the first oil seal 19 are ensured to ensure the sealing of the connection between the piston rod 5 and the front end cover 3 to prevent oil leakage.

[0033] See also Figure 2 and Figure 6 A second dynamic seal 20 is provided at the contact point between the ball screw 10 and the rear end cover 2, a second oil seal 21 is provided on one side of the second dynamic seal 20, and the second dynamic seal 20 and the second oil seal 21 are connected to the rear end cover 2 as a whole, the second dynamic seal 20 and the second oil seal 21 are both provided on the outside of the ball screw 10, and the second dynamic seal 20 and the second oil seal 21 are in contact with the ball screw 10, and the second dynamic seal 20 and the second oil seal 21 are ensured to ensure the sealing of the connection between the ball screw 10 and the rear end cover 2 to prevent oil leakage.

[0034] See also Figure 1 , Figure 2 and Figure 4 A refueling hole 16 is provided on the cylinder body 1, and an oil plug 4 is provided on the outside of the cylinder body 1. The oil plug 4 is provided corresponding to the refueling hole 16, and the oil plug 4 is threadedly connected to the cylinder body 1. A through hole 14 is provided on the connecting plate 7. There are six through holes 14, and the six through holes 14 are equidistantly arranged in a circle on the connecting plate 7. The oil plug 4 is opened to add lubricating oil from the refueling hole 16 to the inside of the cylinder body 1, so as to lubricate the parts in the cylinder body 1 and reduce the sliding resistance. The through hole 14 enables the lubricating oil to flow on both sides of the connecting plate 7. When the connecting plate 7 moves telescopically in the cylinder body 1, the lubricating oil flows for better lubrication.

[0035] See also Figure 2 and Figure 4A second telescopic cavity 13 is provided at the center of the ball screw 10, a guide rod 12 is provided inside the first telescopic cavity 11, and one end of the guide rod 12 is fixedly connected to the piston rod 5, and the other end of the guide rod 12 extends to the inside of the second telescopic cavity 13, and the guide rod 12 is slidably connected to the ball screw 10. The guide rod 12 and the second telescopic cavity 13 guide the telescopic piston rod 5, which can ensure that the piston rod 5 can be smoothly telescoped and retracted, and prevent the piston rod 5 from deflecting when it is telescoped.

[0036] Working principle: Turn on the reduction motor assembly 6 to drive the ball screw 10 to rotate. The ball screw 10 is threadedly connected with the nut 15. As the ball screw 10 rotates, the piston rod 5 is pushed and pulled, and the piston rod 5 is pushed out of the cylinder body 1, or the piston rod 5 is put into the cylinder body 1. The slider 9 and the slide groove 8 play a guiding and limiting role for the movable connecting plate 7. The guide rod 12 and the second telescopic cavity 13 play a guiding role for the telescopic piston rod 5, which can ensure the smooth telescopic extension of the piston rod 5 and prevent the piston rod 5 from deflecting when it is extended and retracted, thereby improving the operation of the electric cylinder. Stability; open the oil plug 4 to add lubricating oil from the filling hole 16 to the inside of the cylinder body 1, lubricate the parts in the cylinder body 1, and reduce the sliding resistance. The through hole 14 enables the lubricating oil to circulate on both sides of the connecting plate 7. When the connecting plate 7 moves in the cylinder body 1, the lubricating oil flows for better lubrication; the first dynamic seal 18 and the first oil seal 19 ensure the sealing of the connection between the piston rod 5 and the front end cover 3, and the second dynamic seal 20 and the second oil seal 21 ensure the sealing of the connection between the ball screw 10 and the rear end cover 2 to prevent oil leakage.

[0037] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric cylinder for a bending machine, comprising a cylinder body (1), characterized in that: Also includes: A rear end cover (2) is arranged at one end of the cylinder body (1); a front end cover (3) is arranged at the other end of the cylinder body (1); the rear end cover (2) and the front end cover (3) are connected to the cylinder body (1) by screws; a piston rod (5) is arranged inside the cylinder body (1); the piston rod (5) and the front end cover (3) are connected to each other, and the piston rod (5) and the front end cover (3) are slidably connected; A reduction motor assembly (6) is arranged on one side of the rear end cover (2), and the reduction motor assembly (6) and the rear end cover (2) are connected by screws. A ball screw (10) is arranged inside the cylinder body (1), and one end of the ball screw (10) is connected to the output end of the reduction motor assembly (6). A connecting disk (7) is arranged inside the cylinder body (1), and the connecting disk (7) is slidably connected to the cylinder body (1). The connecting disk (7) is arranged at one end of the piston rod (5), and the connecting disk (7) is fixedly connected to the piston rod (5). A nut member (15) is arranged at the center of the connecting disk (7), and the nut member (15) is fixedly connected to the connecting disk (7). A first telescopic cavity (11) is arranged at the center of the piston rod (5). One end of the ball screw (10) passes through the nut member (15) and extends to the inside of the first telescopic cavity (11), and the ball screw (10) is threadedly connected to the nut member (15).

2. The electric cylinder for a bending machine according to claim 1, characterized in that: A sealing ring (17) is provided at the contact points between the rear end cover (2) and the front end cover (3) and the cylinder body (1), and the sealing ring (17) is in close contact with the cylinder body (1), the rear end cover (2) and the front end cover (3).

3. The electric cylinder for a bending machine according to claim 1, characterized in that: The inner wall of the cylinder body (1) is provided with a slide groove (8), and there are four slide grooves (8). The outside of the connecting plate (7) is provided with a slider (9), and there are four sliders (9). The slider (9) is fixedly connected to the connecting plate (7). The four sliders (9) are equidistantly arranged outside the connecting plate (7), and the sliders (9) and the slide grooves (8) are arranged correspondingly.

4. The electric cylinder for a bending machine according to claim 1, characterized in that: A first dynamic seal (18) is provided at the contact point between the piston rod (5) and the front end cover (3); a first oil seal (19) is provided on one side of the first dynamic seal (18); the first dynamic seal (18) and the first oil seal (19) are integrally connected to the front end cover (3); the first dynamic seal (18) and the first oil seal (19) are both provided outside the piston rod (5); and the first dynamic seal (18) and the first oil seal (19) are in close contact with the piston rod (5).

5. The electric cylinder for a bending machine according to claim 1, characterized in that: A second dynamic seal (20) is provided at the contact point between the ball screw (10) and the rear end cover (2); a second oil seal (21) is provided on one side of the second dynamic seal (20); the second dynamic seal (20) and the second oil seal (21) are integrally connected to the rear end cover (2); the second dynamic seal (20) and the second oil seal (21) are both provided outside the ball screw (10); and the second dynamic seal (20) and the second oil seal (21) are in close contact with the ball screw (10).

6. The electric cylinder for a bending machine according to claim 1, characterized in that: The cylinder body (1) is provided with a refueling hole (16), an oil plug (4) is provided outside the cylinder body (1), the oil plug (4) is provided corresponding to the refueling hole (16), and the oil plug (4) is threadedly connected to the cylinder body (1), and the connecting plate (7) is provided with a through hole (14), six through holes (14) are provided, and the six through holes (14) are arranged in a circular shape and equidistantly on the connecting plate (7).

7. The electric cylinder for a bending machine according to claim 1, characterized in that: A second telescopic cavity (13) is arranged at the center of the ball screw (10), a guide rod (12) is arranged inside the first telescopic cavity (11), one end of the guide rod (12) is fixedly connected to the piston rod (5), the other end of the guide rod (12) extends to the inside of the second telescopic cavity (13), and the guide rod (12) is slidably connected to the ball screw (10).

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