Sealing element for sealing hydraulic cylinder

Abstract

One end of a cylinder body penetrates through and is connected with a piston rod in a sliding mode, the end, located on the outer surface of the cylinder body, of the piston rod is fixedly connected with a pushing block, the other end of the cylinder body is provided with a pipe opening sealing device, and the pipe opening sealing device comprises a sealing box body. The top of the inner wall of the sealing box body is fixedly connected with a first spring, the end, away from the inner wall of the sealing box body, of the first spring is fixedly connected with an upper rubber ring, the bottom of the inner wall of the sealing box body is fixedly connected with a second spring, and the end, away from the inner wall of the sealing box body, of the second spring is fixedly connected with a lower rubber ring. Through the arrangement of the pipe orifice sealing device, the sealing box body, the first spring, the upper rubber ring, the lower rubber ring, the conical groove, the threaded rod, the rotating block and the third spring, the device and a connected object are tighter, the possibility of leakage is reduced, the conditions of maintenance and disassembly are reduced, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing components for hydraulic cylinders, in particular to a sealing component for hydraulic cylinders. Background Art

[0002] Sealing is one of the effective means to solve the problem of hydraulic system leakage. When the sealing of the hydraulic system is not good, it will pollute the environment due to external leakage, and it will also cause air to enter the hydraulic system and affect the working performance of the hydraulic pump and the stability of the movement of the hydraulic actuator. When the internal leakage is serious, it will cause the system volumetric efficiency to be too low and the oil temperature to rise too high, so that the system cannot work normally.

[0003] According to a disclosed hydraulic cylinder (publication number: CN207892923U), it includes a cylinder body, which includes a seat body and a cylinder barrel that are fixedly connected. The hydraulic cylinder also includes a piston, a piston rod and a cylinder cover. The cylinder cover is fixed to the end of the cylinder body. An axial flange is provided at one end of the cylinder barrel away from the seat body. A waterproof block is clamped in the axial flange. The waterproof block is located on the side of the cylinder cover. The waterproof block has a clearance hole for making way for the piston rod. The piston rod is arranged to pass through the clearance hole. The hydraulic cylinder in the above application is prone to leakage due to wear between objects and long-term use, and the staff needs to disassemble it again and replace the oil seal again, which is time-consuming. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a seal for a hydraulic cylinder seal, which solves the problems raised in the above background technology. To achieve the above purpose, the utility model is implemented through the following technical solutions: a seal for a hydraulic cylinder seal, comprising a cylinder body, one end of which penetrates and is slidably connected to a piston rod, one end of which is located on the outer surface of the cylinder body and is fixedly connected to a push block, and the other end of the cylinder body is provided with a pipe mouth sealing device;

[0005] The pipe mouth sealing device includes a sealing box body, a first spring is fixedly connected to the top of the inner wall of the sealing box body, an upper rubber ring is fixedly connected to the end of the first spring away from the inner wall of the sealing box body, a second spring is fixedly connected to the bottom of the inner wall of the sealing box body, a lower rubber ring is fixedly connected to the end of the second spring away from the inner wall of the sealing box body, tapered grooves are formed on the outer surfaces of the upper rubber ring and the lower rubber ring, a threaded rod passes through and is threadedly connected to the top of the sealing box body, and a rotating block is fixedly connected to the top of the threaded rod.

[0006] Preferably, the sealing box is fixedly connected to the outer surface of one end of the cylinder away from the piston rod, and the end of the cylinder located in the sealing box is in a truncated state. The provision of the sealing box makes the connection between the pipeline and the cylinder more tightly sealed.

[0007] Preferably, the upper rubber ring and the lower rubber ring are larger than the cylinder body, and the larger bottom surface of the tapered groove is located on the side of the upper rubber ring and the lower rubber ring away from the piston rod. The shape of the tapered groove makes the upper rubber ring, the lower rubber ring and the pipeline connection more tightly sealed.

[0008] Preferably, the cylinder is provided with a pipeline stabilizing device, which includes a card slot, the card slot penetrates and is slidably connected to a fixing rod, the outer surface of the fixing rod is fixedly connected to a limiting block, the top of the fixing rod is fixedly connected to a handle, the inner wall of the cylinder is fixedly connected to a third spring, the end of the third spring away from the inner wall of the cylinder is fixedly connected to an arc-shaped clip, and the bottom of the inner wall of the cylinder is fixedly connected to a clamping fixing block. The third spring provides support force for the arc-shaped clip.

[0009] Preferably, the slot is formed at the top of one end of the cylinder body outside the sealed box, and the size of the limit block is smaller than the slot. The limit block can slide between the slots to change position.

[0010] Preferably, there are two third springs, and the two third springs are symmetrically distributed on both sides with the slot as the center.

[0011] The utility model provides a sealing member for a hydraulic cylinder, which has the following beneficial effects:

[0012] (1) The sealing member of the hydraulic cylinder seal, through the arrangement of the pipe mouth sealing device, the sealing box, the first spring, the upper rubber ring, the lower rubber ring, the tapered groove, the threaded rod, the rotating block and the third spring, makes the device and the connected object closer, reduces the possibility of leakage, reduces the need for maintenance and disassembly, and increases the practicality of the device.

[0013] (2) The seal of the hydraulic cylinder seal, through the arrangement of the pipeline stabilizing device, the slot, the fixing rod, the limit block, the handle, the third spring, the arc-shaped clamping piece and the clamping fixing block, enables the device to clamp the object pipeline under the premise of connecting the object, and is suitable for pipes of different sizes within a certain range. There is no need to replace pipe clamps of different specifications as the size changes, which greatly saves the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional overall appearance structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the hydraulic cylinder seal of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the pipe mouth sealing device of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the pipeline stabilizing device of the utility model.

[0018] In the figure: 1. cylinder body; 2. piston rod; 3. push block; 4. pipe mouth sealing device; 41. sealing box; 42. first spring; 43. upper rubber ring; 44. lower rubber ring; 45. tapered groove; 46. threaded rod; 47. rotating block; 48. second spring; 5. pipeline stabilizing device; 51. slot; 52. fixing rod; 53. limit block; 54. handle; 55. third spring; 56. arc-shaped clip; 57. clamping fixing block. DETAILED DESCRIPTION

[0019] 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.

[0020] For example, see Figure 1-3 , a sealing member for a hydraulic cylinder, comprising a cylinder body 1, one end of the cylinder body 1 penetrates and is slidably connected with a piston rod 2, one end of the piston rod 2 located on the outer surface of the cylinder body 1 is fixedly connected with a push block 3, and the other end of the cylinder body 1 is provided with a pipe mouth sealing device 4;

[0021] The pipe mouth sealing device 4 includes a sealing box 41, which is fixedly connected to the outer surface of one end of the cylinder 1 away from the piston rod 2, and the end of the cylinder 1 located in the sealing box 41 is in a truncated state. The setting of the sealing box 41 makes the connection between the pipeline and the cylinder 1 more tightly sealed. A first spring 42 is fixedly connected to the top of the inner wall of the sealing box 41, and an upper rubber ring 43 is fixedly connected to the end of the first spring 42 away from the inner wall of the sealing box 41. The first spring 42 provides a restoring force for the upper rubber ring 43. A second spring 48 is fixedly connected to the bottom of the inner wall of the sealing box 41, and the second spring 48 is away from the sealing box. A lower rubber ring 44 is fixedly connected to one end of the inner wall of the box body 41, and a second spring 48 provides support for the lower rubber ring 44. A conical groove 45 is provided on the outer surfaces of the upper rubber ring 43 and the lower rubber ring 44. The upper rubber ring 43 and the lower rubber ring 44 are larger than the cylinder body 1, and the larger bottom surface of the conical groove 45 is located on the side of the upper rubber ring 43 and the lower rubber ring 44 away from the piston rod 2. The shape of the conical groove 45 makes the upper rubber ring 43 and the lower rubber ring 44 and the pipeline connection more tightly sealed. A threaded rod 46 passes through and is threadedly connected to the top of the sealing box body 41, and a rotating block 47 is fixedly connected to the top of the threaded rod 46.

[0022] When in use, when it is necessary to connect the hydraulic rod to the pipeline, rotate the rotating block 47. The rotating block 47 rotates to drive the threaded rod 46 to rotate out of the sealing box 41, the first spring 42 is relaxed, and its own elastic force causes the upper rubber ring 43 to relax, and the pipeline is inserted into the tapered groove 45 between the upper rubber ring 43 and the lower rubber ring 44. The cone can better clamp the inserted pipeline opening, and the rubber material has stronger sealing performance. At this time, according to the size of the pipeline opening, the first spring 42 and the second spring 48 adjust the position of the upper rubber ring 43 and the lower rubber ring 44. According to the size of the pipeline opening, rotate the rotating block 47. The rotating block 47 rotates to drive the threaded rod 46 to squeeze and fix the upper rubber ring 43 and the lower rubber ring 44 downward, stabilizing the pipeline while having strong sealing performance.

[0023] For example 2, please refer to Figure 1-4 On the basis of the first embodiment, the cylinder body 1 is provided with a pipeline stabilizing device 5, which includes a card slot 51. The card slot 51 is opened at the top of one end of the cylinder body 1 located outside the sealing box body 41. The card slot 51 penetrates and is slidably connected with a fixing rod 52. The outer surface of the fixing rod 52 is fixedly connected with a limiting block 53. The size of the limiting block 53 is smaller than the card slot 51. The limiting block 53 can slide and change its position between the card slots 51. A handle 54 is fixedly connected to the top of the fixing rod 52. A third spring 55 is fixedly connected to the inner wall of the cylinder body 1. There are two third springs 55, and the two third springs 55 are symmetrically distributed on both sides with the card slot 51 as the center. An arc-shaped clip 56 is fixedly connected to one end of the third spring 55 away from the inner wall of the cylinder body 1. The third spring 55 provides support force for the arc-shaped clip 56. A clamping fixing block 57 is fixedly connected to the bottom of the inner wall of the cylinder body 1.

[0024] When in use, on the basis of Example 1, after the pipe is inserted into the pipe mouth sealing device 4, the pipe is placed on the clamping fixed block 57, and the handle 54 is rotated according to the thickness of the pipe to make the length of the limit block 53 parallel to the length of the slot 51, and the fixing rod 52 is pushed downward or upward, and the fixing rod 52 pushes the arc-shaped clamping piece 56 downward to clamp the pipe, and the third spring 55 provides supporting force and restoring force for the arc-shaped clamping piece 56. After the arc-shaped clamping piece 56 clamps the pipe, the handle 54 is rotated ninety degrees to make the length of the limit block 53 perpendicular to the length of the slot 51, so that the pipe is locked and stabilized.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sealing member for a hydraulic cylinder, comprising a cylinder body (1), characterized in that: A piston rod (2) is passed through and slidably connected to one end of the cylinder body (1); one end of the piston rod (2) located on the outer surface of the cylinder body (1) is fixedly connected to a push block (3); and a pipe opening sealing device (4) is provided at the other end of the cylinder body (1); The pipe opening sealing device (4) comprises a sealing box (41), a first spring (42) is fixedly connected to the top of the inner wall of the sealing box (41), an end of the first spring (42) away from the inner wall of the sealing box (41) is fixedly connected to an upper rubber ring (43), a second spring (48) is fixedly connected to the bottom of the inner wall of the sealing box (41), an end of the second spring (48) away from the inner wall of the sealing box (41) is fixedly connected to a lower rubber ring (44), outer surfaces of the upper rubber ring (43) and the lower rubber ring (44) are provided with conical grooves (45), a threaded rod (46) passes through and is threadedly connected to the top of the sealing box (41), and a rotating block (47) is fixedly connected to the top of the threaded rod (46).

2. A sealing member for a hydraulic cylinder seal according to claim 1, characterized in that: The sealing box (41) is fixedly connected to the outer surface of one end of the cylinder (1) away from the piston rod (2), and the end of the cylinder (1) located in the sealing box (41) is in a truncated state.

3. The sealing member for a hydraulic cylinder seal according to claim 1, characterized in that: The upper rubber ring (43) and the lower rubber ring (44) are larger in size than the cylinder body (1), and the larger bottom surface of the tapered groove (45) is located on a side of the upper rubber ring (43) and the lower rubber ring (44) away from the piston rod (2).

4. The sealing member for a hydraulic cylinder seal according to claim 1, characterized in that: The cylinder body (1) is provided with a pipeline stabilizing device (5), the pipeline stabilizing device (5) comprising a clamping groove (51), the clamping groove (51) penetrating and slidably connected to a fixing rod (52), the outer surface of the fixing rod (52) being fixedly connected to a limiting block (53), the top of the fixing rod (52) being fixedly connected to a handle (54), the inner wall of the cylinder body (1) being fixedly connected to a third spring (55), one end of the third spring (55) away from the inner wall of the cylinder body (1) being fixedly connected to an arc-shaped clamping piece (56), and the bottom of the inner wall of the cylinder body (1) being fixedly connected to a clamping fixing block (57).

5. The sealing member for a hydraulic cylinder seal according to claim 4, characterized in that: The slot (51) is formed at the top of one end of the cylinder body (1) outside the sealing box body (41), and the size of the limit block (53) is smaller than the slot (51).

6. The sealing member for a hydraulic cylinder seal according to claim 4, characterized in that: There are two third springs (55) in total, and the two third springs (55) are symmetrically distributed on both sides with the clamping slot (51) as the center.

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