Locking cylinder dustproof sealing structure and locking cylinder

Abstract

The utility model discloses a dustproof sealing structure of a locking cylinder. The dustproof sealing structure comprises a cylinder body, a piston rod, a bushing, an oil seal and a dustproof ring, wherein the piston rod is arranged in the cylinder body in a sliding manner; a bushing is fixedly arranged between the cylinder body and the piston rod, and an oil seal is arranged at the rear end of the bushing; the dustproof ring is fixedly arranged between the lining and the piston rod, and the distance between the dustproof ring and the front end of the lining is larger than the distance between the piston rod retracting from the initial position to the shortest position. In the dustproof sealing structure of the locking cylinder, the dustproof ring can play a dustproof, waterproof and antifouling role, oil in the cylinder body is prevented from being polluted, and the service life of the locking cylinder is prolonged; the dustproof ring is far away from the front end face of the lining, the problem that the dustproof ring falls off due to stretching of the piston rod can be effectively avoided, and antifouling reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of locking cylinders, in particular to a dust-proof sealing structure for a locking cylinder and a locking cylinder. Background Art

[0002] Section steel exhibits excellent mechanical properties in the fields of civil architecture, industrial architecture, bridge construction, petroleum industry, high-rise buildings, subway tunnels and mine roadways, and industrial steel structures, etc., and is widely used. With the rapid development of China's economy, the output and quality requirements of section steel and strip steel are increasing day by day, and higher requirements are placed on the rolling mills for producing section steel and strip steel. However, it is also essential to improve the performance of the auxiliary equipment of the whole line. On the production line of section steel and strip steel products, the locking oil cylinder plays a key role in fixing the moving parts.

[0003] The disc spring locking cylinder can also be used as the first choice of automatic hydraulic fixture for heavy lathes, grinders, boring and milling machines, machining centers, flexible production lines, etc., and is widely used in industries such as domestic heavy machine tool factories and automation factories. The disc spring locking cylinder has a simple product structure and is easy to install and use. Using the disc spring locking cylinder to clamp in some occasions where manual operation is difficult can effectively improve work efficiency, shorten the installation time, unloading time, and positioning and clamping time.

[0004] The traditional disc spring locking cylinder has the following problems in the use process:

[0005] 1. Pollutants may enter the inside of the cylinder body through the gap between the piston rod and the cylinder body, causing the hydraulic oil to be contaminated and resulting in unstable oil pressure, damaging the parts inside the cylinder body, and thus reducing the service life of the disc spring locking cylinder;

[0006] 2. The traditional way of the dust-proof seal ring groove is not suitable for the use of the disc spring locking cylinder, and the telescopic movement of the piston rod may cause the dust-proof ring to fall off.

[0007] Based on the above problems, this application proposes a dust-proof sealing structure for a locking cylinder. Content of the Utility Model

[0008] The purpose of the utility model is to provide a dust-proof sealing structure for a locking cylinder and a locking cylinder. The dust-proof ring can effectively isolate external pollution from entering the inside of the cylinder body, and the sewage discharge groove is used for sewage discharge and drainage to ensure that the use of the locking cylinder is not affected and extend its service life.

[0009] The purpose of the utility model is realized by adopting the following technical solutions:

[0010] A dust-proof sealing structure for a locking cylinder includes a cylinder body, a piston rod, a bushing, an oil seal and a dust-proof ring.

[0011] Wherein, the piston rod is slidably arranged in the cylinder body; a bushing is fixedly arranged between the cylinder body and the piston rod, and an oil seal is arranged at the rear end of the bushing; a dust seal is fixedly arranged between the bushing and the piston rod, and the distance between the front end of the dust seal and the bushing is greater than the distance between the piston rod retracting from the initial position to the shortest position.

[0012] In some embodiments, a bushing groove and an oil seal groove are arranged on the inner side of the cylinder body, and the bushing and the oil seal are respectively arranged in the bushing groove and the oil seal groove.

[0013] In some embodiments, the diameter of the bushing groove is greater than the diameter of the oil seal groove.

[0014] In some embodiments, the bushing is a copper bushing.

[0015] In some embodiments, dust grooves are arranged on the inner side of the bushing, and the dust seal is arranged in the dust grooves.

[0016] In some embodiments, sewage grooves are further arranged on the inner side of the bushing, and the sewage grooves are located in front of the dust grooves.

[0017] In some embodiments, a groove is arranged at the front end of the dust groove, the diameter of the groove is smaller than the diameter of the dust groove, and the groove is connected to the rear end of the sewage groove.

[0018] In some embodiments, the number of the sewage grooves is 2 - 6, and they are circumferentially and spacedly distributed around the bushing.

[0019] In some embodiments, the bushing and the cylinder body are connected by anti-rotation set screws.

[0020] In some embodiments, a gland is arranged at the front end of the cylinder body, and the gland is used to press and position the bushing.

[0021] The present utility model also discloses a locking cylinder, including the above-mentioned locking cylinder dust and seal structure.

[0022] Compared with the prior art, the beneficial effects of the present utility model at least include:

[0023] 1. The dust seal can play a role in dust prevention, water prevention and pollution prevention, avoid the oil fluid in the cylinder body from being polluted, and improve the service life of the locking cylinder.

[0024] 2. The dust seal is far from the front end face of the bushing, which can effectively avoid the problem of the dust seal falling off caused by the telescopic movement of the piston rod, and improve the reliability of pollution prevention. Description of the Drawings

[0025] Figure 1It is a schematic diagram of the dust-proof sealing structure of the locking cylinder according to an embodiment of the present utility model.

[0026] Figure 2 It is a schematic diagram of the structure at the front end of the cylinder block according to an embodiment of the present utility model.

[0027] Figure 3 It is a schematic diagram of the structure of the bushing according to an embodiment of the present utility model.

[0028] In the figure: 1. Cylinder block; 11. Bushing groove; 12. Oil seal groove; 2. Piston rod; 3. Bushing; 31. Dust-proof groove; 32. Groove; 33. Drainage groove; 4. Dust-proof ring; 5. Oil seal; 6. Anti-rotation set screw; 7. gland. Specific embodiments

[0029] Now, the exemplary embodiments will be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present utility model will be more complete and comprehensive, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the figures denote the same or similar structures, and thus their repeated description will be omitted.

[0030] In the present utility model, the words describing the position and direction are illustrated by taking the accompanying drawings as examples, but can be changed according to needs, and all the changes made are included in the protection scope of the present utility model.

[0031] See Figure 1 As shown, the present utility model discloses a dust-proof sealing structure of a locking cylinder, including a cylinder block 1, a piston rod 2, a bushing 3, a dust-proof ring 4 and an oil seal 5.

[0032] Among them, the piston rod 2 is slidably arranged in the cylinder block 1, and it can move left and right along the axial direction to cooperate with the clamping device to realize the locking and loosening functions.

[0033] The bushing 3 is fixedly arranged between the cylinder block 1 and the piston rod 2, and an oil seal 5 is arranged at the rear end of the bushing 3 to prevent the oil from leaking between the cylinder block 1 and the piston rod 2. In this application, the oil seal 5 can be a seal such as a Gleitring, a lip seal, a Struth seal, etc., and there is no specific limitation, and it can be selected according to the installation conditions of the oil seal 5.

[0034] The dust-proof ring 4 is fixedly arranged between the bushing 3 and the piston rod 2. The dust-proof ring 4 can be a dust-proof part such as a lip dust-proof ring 4, a Tecas combination dust-proof ring 4, a Zokang combination dust-proof ring 4, etc. It is used to isolate external pollutants (such as water, oil, dust, etc.) from entering the inside of the cylinder block 1 to contaminate the oil, and to seal the piston rod 2 and the bushing 3 to a certain extent to further prevent the oil from leaking.

[0035] In addition, the present application defines the specific position of the dust-proof ring 4. Specifically, the distance between the dust-proof ring 4 and the front end of the bushing 3 is greater than the distance that the piston rod 2 retracts from the initial position to the shortest position. This spacing requirement can effectively avoid the problem of the dust-proof ring 4 falling off due to the telescopic movement of the piston rod 2, and improve the reliability of anti-pollution.

[0036] In summary, the dust-proof sealing structure of the locking cylinder avoids pollutants from entering the inside of the cylinder block 1 to contaminate the oil fluid through the dust-proof ring 4, and improves the stability of the position of the dust-proof ring 4 through distance limitation, so that excellent dust-proof sealing performance is achieved between the cylinder block 1 and the piston rod 2.

[0037] See Figure 2 As shown, in some embodiments, a bushing groove 11 and an oil seal groove 12 are provided on the inner side of the cylinder block 1, and the bushing 3 and the oil seal 5 are respectively arranged in the bushing groove 11 and the oil seal groove 12 to fix their respective positions.

[0038] Furthermore, the diameter of the bushing groove 11 is larger than the diameter of the oil seal groove 12, and the bushing groove 11 communicates with the oil seal groove 12 to form a stepped structure, which enables the bushing groove 11 and the oil seal groove 12 to be processed and formed at one time, with simple process and high forming efficiency. Moreover, the bushing 3 installed in the bushing groove 11 can press and adjust the oil seal 5 installed in the oil seal groove 12 to ensure the sealing performance of the oil seal 5.

[0039] In some embodiments, the bushing 3 is a copper bushing, which can withstand large loads and impacts, and has excellent wear resistance, and can maintain good performance after long-term use in harsh environments such as humidity and acidity. In addition, the copper bushing can effectively reduce vibration and noise, reduce the noise when the piston rod 2 moves, and improve the stability during the operation of the locking cylinder.

[0040] See Figure 3 As shown, in some embodiments, a dust-proof groove 31 is provided on the inner side of the bushing 3, and the dust-proof ring 4 is arranged in the dust-proof groove 31 to fix the position of the dust-proof ring 4.

[0041] Furthermore, a sewage discharge groove 33 is also provided on the inner side of the bushing 3. The sewage discharge groove 33 is located in front of the dust-proof groove 31 and can play a role in discharging sewage and water to avoid affecting the anti-pollution performance of the dust-proof ring 4. Exemplarily, in the present application, the number of the sewage discharge grooves 33 is 2-6, and they are circumferentially and spaced apart around the bushing 3 to ensure that the locking cylinder has the function of discharging sewage at multiple circumferential positions.

[0042] Even further, a groove 32 is provided at the front end of the dust-proof groove 31. The diameter of the groove 32 is smaller than the diameter of the dust-proof groove 31, and the groove 32 is connected to the rear end of the sewage discharge groove 33. The groove 32 is used to collect pollutants and facilitate the discharge of pollutants through the sewage discharge groove 33 to the outside.

[0043] SeeFigure 1 As shown, in some embodiments, the bushing 3 is connected to the cylinder block 1 by anti-rotation set screws 6 to fix the position of the bushing 3.

[0044] Furthermore, a gland 7 is provided at the front end of the cylinder block 1. The gland 7 is used to press and position the bushing 3 to ensure the stability of the position of the bushing 3.

[0045] In addition, the present utility model also discloses a locking cylinder, including the above-mentioned dust-proof sealing structure of the locking cylinder.

[0046] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Without departing from the principle and purpose of the present utility model, those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model, and all these changes should fall within the protection scope of the claims of the present utility model.

Claims

1. A dust-proof sealing structure for a locking cylinder, characterized in that, Comprising: Cylinder block (1); Piston rod (2), slidably disposed within the cylinder block (1); Bushing (3), fixedly disposed between the cylinder block (1) and the piston rod (2), and an oil seal (5) is provided at the rear end of the bushing (3); Dust seal (4), fixedly disposed between the bushing (3) and the piston rod (2), and the distance between the front end of the dust seal (4) and the bushing (3) is greater than the distance that the piston rod (2) retracts from the initial position to the shortest position.

2. The dust-proof sealing structure of the locking cylinder according to claim 1, characterized in that, A bushing groove (11) and an oil seal groove (12) are provided on the inner side of the cylinder block (1), and the bushing (3) and the oil seal (5) are respectively disposed within the bushing groove (11) and the oil seal groove (12).

3. The dust-proof sealing structure of the locking cylinder according to claim 2, characterized in that, The diameter of the bushing groove (11) is greater than the diameter of the oil seal groove (12).

4. The dust-proof sealing structure of the locking cylinder according to claim 1, wherein A dust groove (31) is provided on the inner side of the bushing (3), and the dust seal (4) is disposed within the dust groove (31).

5. The dust-proof sealing structure of the locking cylinder according to claim 4, characterized in that, A drain groove (33) is further provided on the inner side of the bushing (3), and the drain groove (33) is located in front of the dust groove (31).

6. The dust-proof sealing structure of the locking cylinder according to claim 5, characterized in that, A groove (32) is provided at the front end of the dust groove (31), the diameter of the groove (32) is smaller than the diameter of the dust groove (31), and the groove (32) connects to the rear end of the drain groove (33).

7. The dust-proof sealing structure of the locking cylinder according to claim 5, characterized in that, The number of the drain grooves (33) is 2 - 6, and they are circumferentially and spacedly distributed around the bushing (3).

8. The dust-proof sealing structure of the locking cylinder according to claim 1, characterized in that The bushing (3) and the cylinder block (1) are connected by an anti-rotation set screw (6).

9. The dust-proof sealing structure of the locking cylinder according to claim 1, wherein, A gland (7) is provided at the front end of the cylinder block (1), and the gland (7) is used to press and position the bushing (3).

10. A locking cylinder, characterized in that, Comprising the dust-proof and sealing structure for the locking cylinder as described in any one of claims 1 - 9.

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