A speed-regulating hydraulic cylinder

Abstract

The utility model discloses a speed regulating hydraulic cylinder, comprising: an oil storage tank; the outer side of the regulating device is fixedly connected to the inner side of the main cylinder body; the outer wall of the anti-overflow device is slidably connected to the inner wall of the regulating device, and the utility model relates to the technical field of hydraulic cylinders. The device is provided with an anti-overflow device. Due to the wear of the piston surface during the long-term use of the piston, the damaged piston is not replaced in time, resulting in the overflow of the injected hydraulic oil. Through the return oil groove opened on the inner wall of the first piston rod, the overflowed hydraulic oil is squeezed into the return oil groove along the inner wall of the first piston rod for collection and buffering, until the oil outlet pipe on the first piston rod is connected with the hydraulic oil channel, the hydraulic oil flows into the inside of the first piston rod through the hydraulic oil channel for reuse, reducing the leakage of the hydraulic oil squeezed by the damaged piston ring, promoting the use effect of the hydraulic oil on the equipment, and reducing the waste of hydraulic oil.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a speed-regulating hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the movement is smooth, so it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. The multi-stage hydraulic cylinder is composed of a two-stage or multi-stage piston cylinder set, and is mainly composed of a cylinder head, a cylinder barrel, a sleeve, a piston and other parts.

[0003] However, in the prior art, in actual use, since the piston ring is affected by its own environment, the surface of the piston ring is worn during long-term use, and it is impossible to observe the damaged piston ring and replace it in time. The damaged piston ring will cause the hydraulic oil to leak during operation, increasing the waste of hydraulic oil. The leaked hydraulic oil affects the use effect of the equipment. Utility Model Content

[0004] In view of the deficiencies in the prior art, the technical solution adopted by the utility model to solve the technical problems is: a speed-regulating hydraulic cylinder, comprising: an oil storage tank; a main cylinder body, an adjusting device, the outer side of the adjusting device is fixedly connected to the inner side of the main cylinder body; an anti-overflow device, the outer wall of the anti-overflow device is slidably connected to the inner wall of the adjusting device; the adjusting device comprises an oil pump, the oil pump is provided with two groups, and the inner wall of each group of the oil pumps is fixedly connected to an oil delivery pipe, the outer wall of the oil delivery pipe is fixedly connected to a one-way valve, the bottom of the inner cavity of the main cylinder body is fixedly connected to a first spring, the end of the first spring away from the main cylinder body is fixedly connected to a first piston ring, the top of the first piston ring is fixedly A first piston rod is fixedly connected, and through holes are symmetrically opened in the wall of the first piston rod, and hydraulic oil channels are symmetrically opened in the wall of the main cylinder body. The operator will start two sets of oil pumps, and the two sets of oil pumps will respectively inject hydraulic oil into the interior of the main cylinder body through oil pipes. Due to the restriction of the one-way valve, the hydraulic oil will not be injected into the interior of the first piston rod. The continuously injected hydraulic oil pushes the first piston ring to move along the axial direction of the main cylinder body, so that the moving first piston stretches the first spring, and the first piston ring drives the first piston rod to slide along the inner wall of the main cylinder body, thereby realizing the primary sliding of the first piston rod, and the sealing ring seals the sliding first piston rod.

[0005] Preferably, the outer wall of the oil pump is fixedly connected to the inner wall of the oil storage tank through a connecting pipe, the outer wall of the oil delivery pipe is fixedly connected to the inner wall of the main cylinder body, and the interior of the oil delivery pipe is communicated with the interior of the main cylinder body, the outer wall of the first piston ring is slidably connected to the inner wall of the main cylinder body, and due to the restriction of the one-way valve, the hydraulic oil will not be injected into the interior of the first piston rod. The continuously injected hydraulic oil pushes the first piston ring to move along the axial direction of the main cylinder body, so that the moving first piston stretches the first spring, and the first piston ring drives the first piston rod to slide along the inner wall of the main cylinder body, thereby realizing a first-level sliding by sliding the first piston rod, and the sealing ring seals the sliding first piston rod.

[0006] Preferably, the outer wall of the first piston rod is slidably connected to the inner wall of the main cylinder body, and a sealing ring is fixedly connected to the top of the main cylinder body, and the inner wall of the sealing ring is slidably connected to the outer wall of the first piston rod. When the first piston rod slides between the two hydraulic oil channels, the through hole on the first piston rod is connected to the groove at the top of the hydraulic oil channel, so that the interior of the first piston rod is connected to the interior of the main cylinder body through the hydraulic oil channel, and the hydraulic oil in the main cylinder body is injected into the interior of the first piston rod, and the injected hydraulic oil pushes the second piston ring to move along the axial direction of the first piston rod.

[0007] Preferably, the anti-overflow device includes a second piston ring, a second spring is fixedly connected to the bottom end of the second piston ring, a second piston rod is fixedly connected to the top end of the second piston ring, an inner wall of the first piston rod is symmetrically provided with oil return grooves, and the interior of the oil return grooves is communicated with the interior of the first piston rod, an oil outlet pipe is provided in the wall of the first piston rod, and the interior of the oil return groove is communicated with the interior of the oil outlet pipe. When it is necessary to contract the first piston rod and the second piston rod, two sets of oil pumps are started to extract hydraulic oil. At this time, the hydraulic oil inside the main cylinder body is extracted through the oil delivery pipe, so that the first piston ring and the first piston rod move along the axial direction of the main cylinder body, so that the first spring returns, thereby improving work efficiency and completing a first-level contraction of the first piston rod.

[0008] Preferably, one end of the second spring away from the second piston ring is fixedly connected to the bottom of the inner cavity of the first piston rod, the outer wall of the second piston ring is slidably connected to the inner wall of the first piston rod, and the outer wall of the second piston rod is slidably connected to the inner wall of the first piston rod. The oil pump draws hydraulic oil from the first piston rod through the oil pipe, so that the second spring returns to its position, thereby improving work efficiency and completing two-stage contraction of the second piston rod. In addition, a third piston and a third piston rod can be added inside the second piston rod to achieve more stages of contraction, and the speed of the hydraulic cylinder can be regulated by controlling the amount of hydraulic oil input into the main cylinder by the oil pump, which is easy to use.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. The utility model is provided with an anti-overflow device. Since the piston surface is worn during the long-term use of the piston and the damaged piston is not replaced in time, the injected hydraulic oil overflows. Through the return oil groove opened on the inner wall of the first piston rod, the overflowed hydraulic oil is squeezed into the return oil groove along the inner wall of the first piston rod for collection and buffering. Until the oil outlet pipe on the first piston rod is connected with the hydraulic oil channel, the hydraulic oil flows into the interior of the first piston rod through the hydraulic oil channel for reuse, thereby reducing the leakage of hydraulic oil due to squeezing of the damaged piston ring, promoting the use effect of the hydraulic oil on the equipment, and reducing the waste of hydraulic oil.

[0011] 2. The utility model sets an adjustment device, and two groups of oil pumps inject hydraulic oil into the interior of the main cylinder through oil pipes respectively. The first piston ring drives and pushes the first piston rod to slide along the inner wall of the main cylinder to achieve primary sliding. The second piston ring drives the second piston rod to slide along the inside of the first piston rod to achieve secondary sliding. The two groups of oil pumps are started to extract hydraulic oil, and the first piston ring and the first piston rod move along the axial direction of the main cylinder to complete the primary contraction. The one-way valve is opened, and the oil pump extracts the hydraulic oil in the first piston rod through the oil pipe to complete the secondary contraction. In addition, a third piston and a third piston rod can be added inside the second piston rod to achieve more levels of contraction. The speed of the hydraulic cylinder can be regulated by controlling the amount of hydraulic oil input into the main cylinder by the oil pump, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the oil storage tank and its top of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure inside the main cylinder of the utility model;

[0015] Figure 4 It is a structural schematic diagram of A of the utility model.

[0016] In the figure: 1. oil storage tank; 2. main cylinder body; 3. adjusting device; 31. oil pump; 32. oil delivery pipe; 322. one-way valve; 33. first spring; 34. first piston ring; 35. first piston rod; 36. through hole; 37. hydraulic oil channel; 4. anti-overflow device; 41. second piston ring; 42. second piston rod; 43. oil return groove; 44. oil outlet pipe; 45. second spring; 5. sealing ring. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0018] Example:

[0019] See also Figure 1 - Figure 4 The utility model provides a technical solution: a speed-regulating hydraulic cylinder, comprising: an oil storage tank 1; a main cylinder body 2, an adjusting device 3, the outer side of the adjusting device 3 is fixedly connected to the inner side of the main cylinder body 2; an anti-overflow device 4, the outer wall of the anti-overflow device 4 is slidably connected to the inner wall of the adjusting device 3; the adjusting device 3 comprises an oil pump 31, the oil pump 31 is provided with two groups, and the inner wall of each group of oil pumps 31 is fixedly connected with an oil delivery pipe 32, the outer wall of the oil delivery pipe 32 is fixedly connected with a one-way valve 322, the bottom of the inner cavity of the main cylinder body 2 is fixedly connected with a first spring 33, the end of the first spring 33 away from the main cylinder body 2 is fixedly connected with a first piston ring 34, the top of the first piston ring 34 is fixedly connected with a first piston rod 35, the wall of the first piston rod 35 is symmetrically provided with through holes 36, and the wall of the main cylinder body 2 is symmetrically provided with hydraulic oil channels 37.

[0020] The outer wall of the oil pump 31 is fixedly connected to the inner wall of the oil storage tank 1 through a connecting pipe, the outer wall of the oil delivery pipe 32 is fixedly connected to the inner wall of the main cylinder body 2, and the interior of the oil delivery pipe 32 is connected to the interior of the main cylinder body 2, the outer wall of the first piston ring 34 is slidably connected to the inner wall of the main cylinder body 2, the outer wall of the first piston rod 35 is slidably connected to the inner wall of the main cylinder body 2, and a sealing ring 5 is fixedly connected to the top end of the main cylinder body 2, and the inner wall of the sealing ring 5 is slidably connected to the outer wall of the first piston rod 35.

[0021] The anti-overflow device 4 includes a second piston ring 41, a second spring 45 is fixedly connected to the bottom end of the second piston ring 41, a second piston rod 42 is fixedly connected to the top end of the second piston ring 41, an inner wall of the first piston rod 35 is symmetrically provided with an oil return groove 43, and the interior of the oil return groove 43 is connected to the interior of the first piston rod 35, an oil outlet pipe 44 is provided in the wall of the first piston rod 35, the interior of the oil return groove 43 is connected to the interior of the oil outlet pipe 44, one end of the second spring 45 away from the second piston ring 41 is fixedly connected to the bottom of the inner cavity of the first piston rod 35, the outer wall of the second piston ring 41 is slidably connected to the inner wall of the first piston rod 35, and the outer wall of the second piston rod 42 is slidably connected to the inner wall of the first piston rod 35.

[0022] Working principle:

[0023] When in use, the inside of the oil pump 31 is first connected to the oil storage tank 1 through a connecting pipe, so that the hydraulic oil enters the main cylinder body 2 from the regulating device 3, and the flowing hydraulic oil controls the speed of the hydraulic cylinder through the oil pump 31, and the overflow prevention device 4 returns the leaked hydraulic oil;

[0024] In the above process, first, the operator starts the two sets of oil pumps 31, and the two sets of oil pumps 31 respectively inject hydraulic oil into the interior of the main cylinder 2 through the oil pipe 32. Due to the restriction of the one-way valve 322, the hydraulic oil will not be injected into the interior of the first piston rod 35. The continuously injected hydraulic oil pushes the first piston ring 34 to move along the axial direction of the main cylinder 2, so that the moving first piston stretches the first spring 33, and the first piston ring 34 drives and pushes the first piston rod 35 to slide along the inner wall of the main cylinder 2, realizing the primary sliding of the sliding first piston rod 35, and the sealing ring 5 seals the sliding first piston rod 35;

[0025] When the first piston rod 35 slides between the two hydraulic oil passages 37, the through hole 36 on the first piston rod 35 is connected with the groove at the top of the hydraulic oil passage 37, so that the interior of the first piston rod 35 is connected with the interior of the main cylinder body 2 through the hydraulic oil passage 37, and the hydraulic oil in the main cylinder body 2 is injected into the interior of the first piston rod 35. The injected hydraulic oil pushes the second piston ring 41 to move along the axial direction of the first piston rod 35, and the second piston ring 41 stretches the second spring 45. The second piston ring 41 pushes the second piston rod 42 to slide along the interior of the first piston rod 35, thereby realizing a secondary sliding by sliding the second piston rod 42.

[0026] Due to the wear of the piston surface during long-term use of the piston and the failure to replace the damaged piston in time, the injected hydraulic oil overflows. The overflowing hydraulic oil is squeezed into the oil return groove 43 along the inner wall of the first piston rod 35 for collection and buffering until the oil outlet pipe 44 on the first piston rod 35 is connected to the hydraulic oil channel 37, and the hydraulic oil flows into the interior of the first piston rod 35 through the hydraulic oil channel 37 for reuse.

[0027] When the first piston rod 35 and the second piston rod 42 need to be retracted, the two sets of oil pumps 31 are started to extract hydraulic oil. At this time, the hydraulic oil inside the main cylinder 2 is extracted through the oil delivery pipe 32, so that the first piston ring 34 and the first piston rod 35 move along the axis direction of the main cylinder 2, so that the first spring 33 returns to its original position, thereby improving the working efficiency and completing the first stage retraction of the first piston rod 35.

[0028] Subsequently, after the through hole 36 on the first piston rod 35 is connected with the oil pipe 32, the one-way valve 322 is opened, and the oil pump 31 extracts the hydraulic oil in the first piston rod 35 through the oil pipe 32, so that the second spring 45 returns to its original position, thereby improving the working efficiency and completing the two-stage contraction of the second piston rod 42. In addition, a third piston and a third piston rod can be added inside the second piston rod 42 to achieve more stages of contraction. The speed of the hydraulic cylinder can be regulated by controlling the amount of hydraulic oil input into the main cylinder body 2 by the oil pump 31, which is easy to use.

[0029] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A speed regulating hydraulic cylinder, characterized in that: include: Oil storage tank (1); main cylinder(2); An adjusting device (3), the outer side of the adjusting device (3) being fixedly connected to the inner side of the main cylinder body (2); An anti-overflow device (4), the outer wall of the anti-overflow device (4) being slidably connected to the inner wall of the regulating device (3); The regulating device (3) comprises an oil pump (31), wherein two groups of the oil pump (31) are provided, and the inner wall of each group of the oil pump (31) is fixedly connected to an oil delivery pipe (32), and the outer wall of the oil delivery pipe (32) is fixedly connected to a one-way valve (322), and the bottom of the inner cavity of the main cylinder body (2) is fixedly connected to a first spring (33), and the end of the first spring (33) away from the main cylinder body (2) is fixedly connected to a first piston ring (34), and the top of the first piston ring (34) is fixedly connected to a first piston rod (35), and the wall of the first piston rod (35) is symmetrically provided with through holes (36), and the wall of the main cylinder body (2) is symmetrically provided with hydraulic oil channels (37).

2. A speed regulating hydraulic cylinder according to claim 1, characterized in that: The outer wall of the oil pump (31) is fixedly connected to the inner wall of the oil storage tank (1) via a connecting pipe, the outer wall of the oil delivery pipe (32) is fixedly connected to the inner wall of the main cylinder (2), and the interior of the oil delivery pipe (32) is connected to the interior of the main cylinder (2), and the outer wall of the first piston ring (34) is slidably connected to the inner wall of the main cylinder (2).

3. The speed regulating hydraulic cylinder according to claim 1, characterized in that: The outer wall of the first piston rod (35) is slidably connected to the inner wall of the main cylinder body (2), and a sealing ring (5) is fixedly connected to the top end of the main cylinder body (2), and the inner wall of the sealing ring (5) is slidably connected to the outer wall of the first piston rod (35).

4. The speed regulating hydraulic cylinder according to claim 1, characterized in that: The anti-overflow device (4) comprises a second piston ring (41), the bottom end of the second piston ring (41) is fixedly connected to a second spring (45), the top end of the second piston ring (41) is fixedly connected to a second piston rod (42), the inner wall of the first piston rod (35) is symmetrically provided with oil return grooves (43), and the interior of the oil return grooves (43) is connected to the interior of the first piston rod (35), an oil outlet pipe (44) is provided in the wall of the first piston rod (35), and the interior of the oil return grooves (43) is connected to the interior of the oil outlet pipe (44).

5. A speed regulating hydraulic cylinder according to claim 4, characterized in that: One end of the second spring (45) away from the second piston ring (41) is fixedly connected to the bottom of the inner cavity of the first piston rod (35), the outer wall of the second piston ring (41) is slidably connected to the inner wall of the first piston rod (35), and the outer wall of the second piston rod (42) is slidably connected to the inner wall of the first piston rod (35).

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