Hydraulic cylinder

Abstract

The utility model discloses a hydraulic cylinder which comprises a front end sealing seat, a rear end sealing seat, a hydraulic cylinder shell, a piston connecting rod, a connector and a piston block, the piston block is movably arranged at a hydraulic oil cavity of the hydraulic cylinder shell, and a sealing guide block is arranged at the end of the hydraulic oil cavity of the hydraulic cylinder shell. A piston rod guide sleeve is arranged in the middle of one side of the front end sealing seat, a conical shovel sleeve is arranged on the piston rod guide sleeve, and one end of the piston block is connected with a piston connecting rod and can move in a penetrating mode in a sealing guide block in the hydraulic cylinder shell. The tip end of the conical shovel sleeve is connected with the piston connecting rod in a penetrating mode and provided with an oil blocking flange connected with the piston connecting rod. According to the piston connecting rod, hydraulic oil is not prone to being brought out of a hydraulic cylinder in the reciprocating motion process of the piston connecting rod, good sealing performance is achieved, meanwhile, the lubricating oil column sleeve and the puncture rubber plug are arranged, lubrication can be conducted when needed, and it is guaranteed that good low friction performance is achieved in the motion process.

Description

Technical Field

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

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy to perform linear reciprocating motion. It has a simple structure and reliable operation. When using it to achieve reciprocating motion, the reduction device can be eliminated, 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. Patent No. CN202022321060.7 relates to a hydraulic cylinder, including a cylinder barrel, a pipe sleeve is coaxially fixed on the outer wall of the cylinder barrel, and two connecting pipes connected to its inner cavity are fixed on the outer wall of the pipe sleeve, one of which is connected to the water outlet of an external water pump, and the other is connected to the external cooling water tank. The end of the connecting pipe away from the pipe sleeve is provided with a locking piece for quick connection to the external pipeline. This application has the effect of prolonging the service life of the hydraulic cylinder.

[0003] The above-disclosed hydraulic cylinder has the disadvantage that during the movement of the piston rod, especially the extended portion of the piston rod, the hydraulic oil is easily brought out of the hydraulic cylinder during the reciprocating motion, resulting in the loss of hydraulic oil. For this reason, we design a hydraulic cylinder. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic cylinder to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic cylinder, comprising a front end sealing seat, a rear end sealing seat, a hydraulic cylinder housing, a piston connecting rod, a connecting head and a piston block, the two ends of the hydraulic cylinder housing are respectively welded to the front end sealing seat and the rear end sealing seat, the piston block is movably arranged in the hydraulic oil chamber of the hydraulic cylinder housing, a sealing guide block is arranged at the end of the hydraulic oil chamber of the hydraulic cylinder housing, one end of the piston block is connected to the piston connecting rod and can move through the sealing guide block inside the hydraulic cylinder housing, one end of the piston connecting rod passes through the front end sealing seat and is integrally connected with the connecting head, a piston rod guide sleeve is arranged in the middle of one side of the front end sealing seat, a conical shovel sleeve is arranged inside the piston rod guide sleeve, the tip of the conical shovel sleeve is arranged to be interlaced and connected with the piston connecting rod, and the tip of the conical shovel sleeve is provided with an oil retaining flange connected with the piston connecting rod.

[0006] Preferably, a plurality of reinforcing planes distributed in an annular pattern are provided at the end of one end of the connector, and a locking nut is provided at the end of one end of the connector.

[0007] Preferably, four reinforcing protective connecting rods are arranged between the front end sealing seat and the rear end sealing seat, and the four reinforcing protective connecting rods surround the four corners of the hydraulic cylinder housing.

[0008] Preferably, a puncture plug is provided at the top end of the piston rod guide sleeve, a lubricating oil column sleeve is provided at the top end of the puncture plug, a puncture needle tube is provided at the bottom end of the lubricating oil column sleeve, and the internal oil outlet of the puncture needle tube is located inside the piston rod guide sleeve and corresponds to the piston connecting rod.

[0009] Preferably, a counterweight base frame connected to the front end sealing seat and the rear end sealing seat is provided at the bottom end of the hydraulic cylinder housing, and a counterweight installation slot is provided at the top of the counterweight base frame.

[0010] Preferably, the oil inlet and the oil outlet on one side of the hydraulic cylinder housing are connected to an oil inlet connecting valve seat and an oil outlet connecting valve seat.

[0011] Technical effects and advantages of the utility model:

[0012] (1) The utility model provides a hydraulic cylinder, in which a piston rod guide sleeve is arranged in the middle of one side of a front end sealing seat, and a conical shovel sleeve is provided. The tip of the conical shovel sleeve is arranged to be interlaced and connected with the piston connecting rod, and the tip of the conical shovel sleeve is arranged to be connected with the piston connecting rod. The oil retaining flange connected with the piston connecting rod is provided. It is not easy to bring the hydraulic oil out of the hydraulic cylinder during the reciprocating motion of the piston connecting rod, and a good sealing performance is achieved. At the same time, a lubricating oil column sleeve and a puncture plug are arranged, which can be lubricated when needed to ensure good low friction during the movement. By arranging a counterweight base frame and a counterweight installation slide groove, a good counterweight effect can be increased, the stability is improved, and the stability of the hydraulic cylinder during operation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the internal structure of the hydraulic cylinder housing of the utility model.

[0015] Figure 3 It is a three-dimensional structural schematic diagram of the connector of the utility model.

[0016] In the figure: 1. Front end sealing seat; 2. Rear end sealing seat; 3. Hydraulic cylinder housing; 4. Strengthened protective connecting rod; 5. Oil inlet connecting valve seat; 6. Oil outlet connecting valve seat; 7. Counterweight base; 8. Counterweight mounting slide; 9. Piston rod guide sleeve; 10. Piston connecting rod; 11. Connecting head; 12. Piston block; 13. Conical shovel sleeve; 14. Oil retaining flange; 15. Lubricating oil column sleeve; 16. Piercing rubber plug; 17. Sealing guide block; 18. Piercing needle tube; 19. Strengthened plane; 20. Locking nut. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] The utility model provides Figure 1-3 A hydraulic cylinder as shown;

[0019] Embodiment: The hydraulic cylinder includes a front end sealing seat 1, a rear end sealing seat 2, a hydraulic cylinder housing 3, a piston connecting rod 10, a connecting head 11 and a piston block 12. The two ends of the hydraulic cylinder housing 3 are respectively welded to the front end sealing seat 1 and the rear end sealing seat 2. The piston block 12 is movably arranged in the hydraulic oil chamber of the hydraulic cylinder housing 3. A sealing guide block 17 is arranged at the end of the hydraulic oil chamber of the hydraulic cylinder housing 3. One end of the piston block 12 is connected to the piston connecting rod 10 and can move through the sealing guide block 17 inside the hydraulic cylinder housing 3. One end of the piston connecting rod 10 passes through the front end sealing seat 1 and is integrally connected with the connecting head 11. A piston rod guide sleeve 9 is arranged in the middle of one side of the front end sealing seat 1. A conical shovel sleeve 13 is arranged inside the piston rod guide sleeve 9. The tip of the conical shovel sleeve 13 is arranged to be interlaced and connected with the piston connecting rod 10, and the tip of the conical shovel sleeve 13 is provided with an oil retaining flange 14 connected with the piston connecting rod 10.

[0020] In this embodiment, if Figure 3 As shown, in order to better connect and improve the firmness and convenience of the connection, a plurality of annularly distributed reinforcing planes 19 are provided at the end of one end of the connector 11, and a locking nut 20 is provided at the end of one end of the connector 11.

[0021] In this embodiment, in order to better protect the hydraulic cylinder housing 3 and improve the protection effect and overall strength of the hydraulic cylinder housing 3, four reinforcing protection connecting rods 4 are arranged between the front end sealing seat 1 and the rear end sealing seat 2, and the four reinforcing protection connecting rods 4 surround the four corners of the hydraulic cylinder housing 3.

[0022] like Figure 2 As shown, in the present embodiment, lubrication can be performed when necessary to ensure good low friction during movement. A puncture plug 16 is provided at the top of the piston rod guide sleeve 9, a lubricating oil column sleeve 15 is provided at the top of the puncture plug 16, and a puncture needle tube 18 is provided at the bottom of the lubricating oil column sleeve 15. The internal oil outlet of the puncture needle tube 18 is located inside the piston rod guide sleeve 9 and corresponds to the piston connecting rod 10.

[0023] In this embodiment, in order to ensure the stability of the bottom of the hydraulic cylinder housing 3, a counterweight base frame 7 connected to the front end sealing seat 1 and the rear end sealing seat 2 is provided at the bottom end of the hydraulic cylinder housing 3, and a counterweight installation groove 8 is provided at the top of the counterweight base frame 7.

[0024] In this embodiment, in order to better connect and facilitate the entry and outflow of hydraulic oil, the oil inlet and oil outlet on one side of the hydraulic cylinder housing 3 are connected to an oil inlet connection valve seat 5 and an oil outlet connection valve seat 6.

[0025] The working principle of the utility model is as follows: the hydraulic cylinder is composed of a front end sealing seat 1, a rear end sealing seat 2, a hydraulic cylinder housing 3, a piston connecting rod 10, a connecting head 11 and a piston block 12. The two ends of the hydraulic cylinder housing 3 are respectively welded to the front end sealing seat 1 and the rear end sealing seat 2, and four reinforced protective connecting rods 4 are arranged to surround the four corners of the hydraulic cylinder housing 3, forming a Figure 1 The main structure shown;

[0026] The piston block 12 is movably arranged in the hydraulic oil chamber of the hydraulic cylinder housing 3, and a sealing guide block 17 is arranged at the end of the hydraulic oil chamber of the hydraulic cylinder housing 3. One end of the piston block 12 is connected to the piston connecting rod 10 and can move through the sealing guide block 17 inside the hydraulic cylinder housing 3. One end of the piston connecting rod 10 passes through the front end sealing seat 1 and is integrally connected with the connecting head 11. A locking nut 20 is arranged at the end of one end of the connecting head 11 to improve the firmness and convenience of the connection.

[0027] A piston rod guide sleeve 9 is arranged in the middle of one side of the front end sealing seat 1, and a conical shovel sleeve 13 is arranged inside the piston rod guide sleeve 9. The tip of the conical shovel sleeve 13 is arranged to be inserted and connected with the piston connecting rod 10, and the tip of the conical shovel sleeve 13 is provided with an oil retaining flange 14 connected with the piston connecting rod 10, which can prevent the hydraulic oil from being easily brought out of the hydraulic cylinder during the reciprocating motion of the piston connecting rod 10, and has good sealing performance. At the same time, a lubricating oil column sleeve 15 and a puncture plug 16 are arranged, which can be lubricated when needed to ensure good low friction during the movement.

[0028] In this embodiment, in order to increase the counterweight effect of the hydraulic cylinder housing 3, the stability during operation can be improved.

[0029] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The specific embodiments described in this article are only used to illustrate the spirit of the utility model. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, but they will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A hydraulic cylinder, comprising a front end sealing seat (1), a rear end sealing seat (2), a hydraulic cylinder housing (3), a piston connecting rod (10), a connecting head (11) and a piston block (12), characterized in that: The two ends of the hydraulic cylinder housing (3) are respectively welded to the front end sealing seat (1) and the rear end sealing seat (2); the piston block (12) is movably arranged at the hydraulic oil chamber of the hydraulic cylinder housing (3); a sealing guide block (17) is arranged at the end of the hydraulic oil chamber of the hydraulic cylinder housing (3); one end of the piston block (12) is connected to the piston connecting rod (10) and can move through the sealing guide block (17) inside the hydraulic cylinder housing (3); one end of the piston connecting rod (10) passes through the front end sealing seat (1) and is integrally connected to the connecting head (11); a piston rod guide sleeve (9) is arranged in the middle of one side of the front end sealing seat (1); a conical shovel sleeve (13) is arranged inside the piston rod guide sleeve (9); the tip of the conical shovel sleeve (13) is arranged to be connected through the piston connecting rod (10); and the tip of the conical shovel sleeve (13) is provided with an oil retaining flange (14) connected to the piston connecting rod (10).

2. A hydraulic cylinder according to claim 1, characterized in that: The end of one end of the connector (11) is provided with a plurality of reinforcing planes (19) distributed in an annular manner, and the end of one end of the connector (11) is provided with a locking nut (20).

3. A hydraulic cylinder according to claim 1, characterized in that: Four reinforcing protective connecting rods (4) are arranged between the front end sealing seat (1) and the rear end sealing seat (2), and the four reinforcing protective connecting rods (4) surround the four corners of the hydraulic cylinder housing (3).

4. A hydraulic cylinder according to claim 1, characterized in that: The top end of the piston rod guide sleeve (9) is provided with a puncture rubber plug (16), the top end of the puncture rubber plug (16) is provided with a lubricating oil column sleeve (15), the bottom end of the lubricating oil column sleeve (15) is provided with a puncture needle tube (18), and the internal oil outlet of the puncture needle tube (18) is located inside the piston rod guide sleeve (9) and corresponds to the piston connecting rod (10).

5. A hydraulic cylinder according to claim 1, characterized in that: The bottom end of the hydraulic cylinder housing (3) is provided with a counterweight base frame (7) connected to the front end sealing seat (1) and the rear end sealing seat (2), and the top of the counterweight base frame (7) is provided with a counterweight installation slide groove (8).

6. A hydraulic cylinder according to claim 1, characterized in that: The oil inlet and the oil outlet on one side of the hydraulic cylinder housing (3) are connected to an oil inlet connection valve seat (5) and an oil outlet connection valve seat (6).

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