Hydraulic oil cylinder with high buffering performance

Abstract

The utility model provides a hydraulic oil cylinder with high buffering performance, and relates to the technical field of hydraulic oil cylinders. The oil cylinder comprises an oil cylinder shell, a piston rod is connected into the oil cylinder shell in a sliding mode, a sealing top cover is fixedly connected to the top end of the oil cylinder shell, the piston rod is connected with the sealing top cover in a sliding mode, a limiting mechanism is arranged above the sealing top cover, and the limiting mechanism comprises a pressing disc. And the bottom surface of the pressing disc is fixedly connected with a limiting column. Through the arrangement of the pressing disc, the limiting column, the limiting probe and the limiting hole, when the limiting column is inserted into the limiting hole, the limiting probe can be clamped with the insertion hole formed in the limiting column, so that the limiting column is limited, and the pressing disc can stably press a sealing gasket; and meanwhile, workers can conveniently clean and replace the sealing gasket, and the situation that the sealing performance of the sealing gasket is affected due to the fact that oil stains are accumulated on the sealing gasket is prevented.

Description

Technical Field

[0001] The utility model relates to a hydraulic oil cylinder, in particular to a hydraulic oil cylinder with high buffering performance, belonging to the technical field of hydraulic oil cylinders. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion. It features a simple structure and reliable operation. Using it to achieve reciprocating motion eliminates the need for a reduction gear, eliminates transmission backlash, and provides smooth motion. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] According to the patent number CN213511467U, a hydraulic cylinder with high buffering performance is disclosed, including a cylinder body, a guide rod and a second magnet. Filters are clamped inside the upper and lower right sides of the cylinder body, and a connecting rod is connected to the bearing in the middle of the filter, and a water wheel is welded to the outside of the connecting rod. Oil pipes are connected to the upper and lower right sides of the cylinder body, and collection frames are provided inside the upper and lower right sides of the cylinder body.

[0004] The above solution can play an efficient buffering role during implementation, avoiding damage to the internal components of the hydraulic cylinder due to collision after long-term use. However, during the implementation of the above solution, it is difficult to replace the gasket. The piston rod will be contaminated with a lot of dust when used outside. This dust will remain on the gasket at the top of the cylinder to form oil stains when the piston rod is reset. After long-term use and accumulation, the oil stains will affect the performance of the gasket. The gasket is not convenient for staff to clean, and replacement is relatively complicated. For this reason, we provide a hydraulic cylinder with high buffering performance to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to provide a hydraulic cylinder with high buffering performance in order to solve the above problems, so as to solve the problem in the prior art that the top sealing gasket of the hydraulic cylinder accumulates a lot of oil after long-term use, thereby affecting the sealing performance of the cylinder.

[0006] The utility model is realized through the following technical solutions: a hydraulic cylinder with high buffering performance, comprising a cylinder housing, a piston rod is slidably connected to the interior of the cylinder housing, a sealing top cover is fixedly connected to the top of the cylinder housing, the piston rod is slidably connected to the sealing top cover, a limiting mechanism is arranged above the sealing top cover, the limiting mechanism comprises a pressing disk, the bottom surface of the pressing disk is fixedly connected to a limiting column, a limiting hole is provided on the top surface of the sealing top cover that is adapted to the limiting column, a placement groove is provided on the top surface of the sealing top cover, a sealing gasket is clamped inside the placement groove.

[0007] Preferably, a telescopic rod is fixedly connected to the inner wall of the limiting hole, and a limiting probe is fixedly connected to the end of the telescopic rod. When the limiting probe is plugged into the plug hole, the limiting column can be limited.

[0008] Preferably, a reset spring is sleeved on the outer surface of the telescopic rod, and both ends of the reset spring are fixedly connected to the limit hole and the limit probe respectively, and the reset spring provides support and space for the limit probe to be limited.

[0009] Preferably, a plug hole is opened inside the limiting column, and the limiting probe is plugged into the plug hole. The limiting probe makes it easy for the staff to pull the limiting column out of the limiting hole.

[0010] Preferably, the bottom end of the cylinder housing is fixedly connected to a hydraulic base, the bottom end of the piston rod is fixedly connected to a piston pad, the piston pad is slidably connected to the cylinder housing, and the piston pad can slide inside the cylinder housing under the push of hydraulic oil.

[0011] Preferably, the top surface of the hydraulic base, the bottom surface of the sealing top cover, and the top and bottom surfaces of the piston pad are all provided with placement grooves, and the placement grooves and the buffer magnets can play the role of buffering the piston rod.

[0012] Preferably, a buffer magnet is fixedly connected to the interior of each placement groove, and an oil inlet and return pipe is fixedly connected to the interior of the oil cylinder housing, and the oil inlet and return pipe serves to flow in and out the hydraulic oil.

[0013] The utility model provides a hydraulic cylinder with high buffering performance, which has the following beneficial effects:

[0014] The utility model is provided with a pressing disk, a limit column, a limit probe and a limit hole. When the limit column is inserted into the limit hole, the limit probe will engage with the plug-in hole provided on the limit column, thereby limiting the limit column, so that the pressing disk can stably press the sealing gasket, ensuring that the sealing gasket can clean the dust carried on the piston rod, and at the same time it is convenient for the staff to clean and replace the sealing gasket, preventing oil and dirt from accumulating on the sealing gasket and affecting the sealing performance of the sealing gasket, thereby ensuring the normal use of the device.

[0015] The utility model can prevent the piston pad from directly contacting the oil cylinder housing by setting the buffer magnet, effectively avoiding the piston pad from hitting the cylinder body when the piston rod quickly retracts the stroke end, effectively improving the buffering performance of the device, reducing the damage to the piston pad and extending its service life. By setting the reset spring, the limit probe can be automatically reset, thereby engaging with the plug-in hole, fixing the limit column in the limit hole, and maintaining stable pressing of the pressing disk on the sealing gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a cross-sectional view of the internal structure of the oil cylinder housing of the utility model;

[0018] Figure 3 This is an exploded view of the structure of the present utility model;

[0019] Figure 4 This is a schematic structural diagram of the limiting mechanism of the utility model;

[0020] Figure 5 For this utility model Figure 4 A magnified view of the structure of part A.

[0021]

Main component symbol description

[0022] 1. Cylinder housing; 2. Piston rod; 3. Sealing top cover;

[0023] 4. Limiting mechanism; 401. Pressing plate; 402. Limiting column; 403. Limiting hole; 404. Placement slot; 405. Sealing gasket; 406. Telescopic rod; 407. Limiting probe; 408. Return spring; 409. Connecting hole;

[0024] 5. Hydraulic base; 6. Piston pad; 7. Mounting groove; 8. Buffer magnet; 9. Oil inlet and return pipes. DETAILED DESCRIPTION

[0025] The embodiment of the utility model provides a hydraulic oil cylinder with high buffering performance.

[0026] See also Figure 1 、 Figure 2 and Figure 3 , including a cylinder housing 1, the interior of the cylinder housing 1 is fixedly connected to an oil inlet and return pipe 9, the oil inlet and return pipe 9 is externally connected to a hydraulic oil tank, and can transport or recover hydraulic oil to the interior of the cylinder housing 1, and utilize the pressure change between the oil pressures to provide power for the piston rod 2 to move. The oil inlet and return pipe 9 and the hydraulic oil tank are both existing technologies and will not be described in detail in this application.

[0027] The interior of the cylinder housing 1 is slidably connected to the piston rod 2, and the bottom end of the piston rod 2 is fixedly connected to the piston pad 6. The piston pad 6 is slidably connected to the cylinder housing 1, and there is no gap between the piston pad 6 and the inner wall of the cylinder housing 1. When the hydraulic oil enters the cylinder housing 1 or flows back from the cylinder housing 1 to the oil inlet and return pipes 9, the change in pressure can drive the piston pad 6 and the piston rod 2 to slide inside the cylinder housing 1, thereby realizing the operation of the cylinder.

[0028] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The top of the cylinder housing 1 is fixedly connected with a sealing top cover 3, and the piston rod 2 is slidably connected to the sealing top cover 3. There is good sealing between the piston rod 2 and the sealing top cover 3 to prevent the hydraulic oil from flowing to the outside of the cylinder housing 1 through the gap. The sealing top cover 3 can limit the movement of the piston rod 2 and prevent the piston rod 2 from slipping out of the cylinder housing 1 and affecting the normal use of the device.

[0029] Please refer again Figure 1 、 Figure 2 and Figure 3 The bottom end of the cylinder housing 1 is fixedly connected to a hydraulic base 5. The top surface of the hydraulic base 5, the bottom surface of the sealing top cover 3, and the top and bottom surfaces of the piston pad 6 are all provided with placement grooves 7. A buffer magnet 8 is fixedly connected to the inside of each placement groove 7. The magnetic poles of two adjacent buffer magnets 8 are opposite, and there is a certain repulsive force, which can buffer the movement of the piston rod 2. The magnitude of the repulsive force between the magnetic poles is determined by the actual power of the hydraulic cylinder. By setting multiple buffer magnets 8, direct contact between the piston pad 6 and the cylinder housing 1 can be prevented, and the piston pad 6 can be effectively prevented from hitting the cylinder body when the piston rod 2 quickly returns to the stroke end, thereby effectively improving the buffering performance of the device, reducing damage to the piston pad 6, and extending its service life.

[0030] See also Figure 3 、 Figure 4 and Figure 5 A limiting mechanism 4 is provided above the sealing top cover 3. The limiting mechanism 4 includes a pressing disk 401. The inner circle radius of the pressing disk 401 is larger than the radius of the sealing gasket 405. The pressing disk 401 can press the sealing gasket 405 so that the limiting hole 403 can be fixed in the placement groove 404, preventing the sealing gasket 405 from falling off from the placement groove 404 by itself and affecting its scraping effect on the dust on the surface of the piston rod 2.

[0031] The bottom surface of the pressing disk 401 is fixedly connected to the limiting column 402, and the top surface of the sealing top cover 3 is provided with a limiting hole 403 that is compatible with the limiting column 402. The limiting column 402 can be slidably inserted into the limiting hole 403 to complete the fixation of the pressing disk 401. The limiting column 402 is evenly distributed in a circular shape on the bottom surface of the pressing disk 401, and can provide a stable connection effect for the pressing disk 401.

[0032] A placement groove 404 is provided on the top surface of the sealing top cover 3, and a sealing gasket 405 is clamped inside the placement groove 404. When the piston rod 2 is reset, the sealing gasket 405 can scrape the dust carried on the surface of the piston rod 2 and leave it on the sealing gasket 405, preventing the dust from entering the interior of the cylinder housing 1 along with the piston rod 2 and affecting the purity of the hydraulic oil. The sealing gasket 405 is made of rubber and has good sealing performance with the piston rod 2.

[0033] A telescopic rod 406 is fixedly connected to the inner wall of the limit hole 403, and the end of the telescopic rod 406 is fixedly connected to the limit probe 407. The telescopic rod 406 can provide support for the movement of the limit probe 407, so that the limit probe 407 can remain stable when sliding in the limit hole 403, and the limit probe 407 can remain stably engaged with the plug hole 409.

[0034] See also Figure 4 and Figure 5 The outer surface of the telescopic rod 406 is provided with a reset spring 408, and the two ends of the reset spring 408 are fixedly connected to the limit hole 403 and the limit probe 407 respectively. Through the setting of the reset spring 408, the limit probe 407 can be automatically reset, thereby engaging with the plug-in hole 409, so that the limit column 402 is fixed in the limit hole 403, maintaining the stable pressing of the pressing disk 401 on the sealing gasket 405.

[0035] A plug-in hole 409 is provided inside the limiting column 402, and the limiting probe 407 is plugged into the plug-in hole 409. When the sealing gasket 405 needs to be replaced, the pressing disk 401 is pulled, and the limiting column 402 squeezes the limiting probe 407, which can cause the limiting probe 407 to compress the reset spring 408, thereby pulling the limiting column 402 out of the limiting hole 403, canceling the pressing of the pressing disk 401 on the sealing gasket 405, and at this time, the sealing gasket 405 can be taken out of the placement groove 404 and replaced.

[0036] Working principle: When the staff wants to replace the sealing gasket 405, they pull up the pressing disk 401 with force. The pressing disk 401 is forced to drive the limit column 402 to rise. At this time, the limit column 402 will squeeze the limit probe 407 so that the limit probe 407 compresses the reset spring 408 and cancels the clamping state with the plug-in hole 409, thereby facilitating the limit column 402 to slide out of the limit hole 403, and then remove the sealing gasket 405 from the placement groove 404 and clean or replace it. When installing the sealing gasket 405, first place the sealing gasket 405 in the placement groove 404, and then press the pressing disk 401 with force. This device facilitates the disassembly and installation of the sealing gasket 405, and facilitates the cleaning and replacement of the sealing gasket 405, prevents the sealing performance of the sealing gasket 405 from being reduced after long-term use, and ensures the normal use of the device.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with high buffering performance, comprising a cylinder housing (1), characterized in that: The interior of the oil cylinder housing (1) is slidably connected to a piston rod (2), the top end of the oil cylinder housing (1) is fixedly connected to a sealing top cover (3), the piston rod (2) and the sealing top cover (3) are slidably connected, a limiting mechanism (4) is provided above the sealing top cover (3), the limiting mechanism (4) comprises a pressing disk (401), the bottom surface of the pressing disk (401) is fixedly connected to a limiting column (402), the top surface of the sealing top cover (3) is provided with a limiting hole (403) adapted to the limiting column (402), the top surface of the sealing top cover (3) is provided with a placement groove (404), and a sealing gasket (405) is clamped inside the placement groove (404).

2. The hydraulic cylinder with high buffering performance according to claim 1, characterized in that: A telescopic rod (406) is fixedly connected to the inner wall of the limiting hole (403), and a limiting probe (407) is fixedly connected to the end of the telescopic rod (406).

3. The hydraulic cylinder with high buffering performance according to claim 2, characterized in that: The outer surface of the telescopic rod (406) is sleeved with a return spring (408), and the two ends of the return spring (408) are fixedly connected to the limit hole (403) and the limit probe (407) respectively.

4. The hydraulic cylinder with high buffering performance according to claim 2, characterized in that: A plug hole (409) is provided inside the limiting column (402), and the limiting probe (407) is plugged into the plug hole (409).

5. The hydraulic cylinder with high buffering performance according to claim 1, characterized in that: The bottom end of the oil cylinder housing (1) is fixedly connected to a hydraulic base (5), the bottom end of the piston rod (2) is fixedly connected to a piston pad (6), and the piston pad (6) is slidably connected to the oil cylinder housing (1).

6. The hydraulic cylinder with high buffering performance according to claim 5, characterized in that: The top surface of the hydraulic base (5), the bottom surface of the sealing top cover (3), and the top and bottom surfaces of the piston pad (6) are all provided with placement grooves (7).

7. The hydraulic cylinder with high buffering performance according to claim 6, characterized in that: A buffer magnet (8) is fixedly connected to the interior of each placement groove (7), and an oil inlet and return pipe (9) is fixedly connected to the interior of the oil cylinder housing (1).

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