Water-cooled air cylinder

Abstract

The utility model relates to an air cylinder, in particular to a water-cooling air cylinder, which solves the design problem of a sealing structure of the water-cooling air cylinder. Comprising a piston rod and a cylinder body, the cylinder body is provided with a movable cavity which is arranged along the axis and allows the piston rod to be inserted in, the center of the movable cavity is provided with a piston cavity with the diameter larger than that of the two ends, and a cylinder sleeve connected to the outer portion of the piston rod in a sleeving mode is arranged in the piston cavity and is divided into an inner cavity and an outer cavity through the cylinder sleeve; the top of the cylinder body is provided with two water connectors and two air connectors, the water connectors are communicated with the outer cavity, the air connectors are communicated with the inner cavity, and the cavity wall of the piston cavity is provided with fixing grooves for installation of the cylinder sleeve, so that the water-cooling contact face is enlarged, the water-cooling cooling effect is improved, the piston structure is optimized and upgraded, and the dustproof and waterproof sealing performance is improved; and a buffer ring is further designed to reduce abrasion consumption at the junction, the service life of the product is prolonged on the whole, and practicability and economical efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to a cylinder, in particular to a water-cooled cylinder. Background Art

[0002] A cylinder refers to a cylindrical metal part that guides a piston to perform linear reciprocating motion in the cylinder. Air expands in the engine cylinder to convert heat energy into ; gas is compressed by the piston in to increase the pressure. , The housings of : printing ( ), semiconductor ( , chip grinding), automatic control, robots, etc. are usually also called "cylinders". The Content of the Utility Model

[0003] Aiming at the existing technical deficiencies, the utility model provides a water-cooled cylinder.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a water-cooled cylinder, including a piston rod and a cylinder block. The cylinder block is provided with a movable cavity arranged along the axis for the piston rod to insert. The central part of the movable cavity has a piston cavity with a diameter larger than that of both ends. A cylinder sleeve sleeved outside the piston rod is arranged in the piston cavity. The piston cavity is divided into an inner cavity and an outer cavity by the cylinder sleeve. Two water interfaces and two air interfaces are respectively arranged at the top of the cylinder block. The water interfaces are communicated with the outer cavity, and the air interfaces are communicated with the inner cavity. The piston cavity is provided with a fixing groove for installing the cylinder sleeve on the cavity wall, and a sealing ring is arranged in the fixing groove. A buffer ring and a dust-proof ring are arranged between the piston rod and the movable cavity. A piston seat is fixedly assembled on the piston rod. Balance grooves are arranged on the axial end faces of the piston seat, and a ring groove and a piston ring placed in the ring groove are arranged on the radial end face of the piston seat.

[0005] The cylinder block includes a front cylinder head, a cylinder barrel and a rear cylinder head which are bolted and fixed. The water interfaces are arranged at the top of the cylinder barrel, and the air interfaces are respectively arranged at the tops of the front cylinder head and the rear cylinder head.

[0006] The end of the movable cavity is arranged at the rear cylinder head. The dust-proof ring is only arranged at the front cylinder head, and the buffer ring is arranged at both the front cylinder head and the rear cylinder head.

[0007] The piston seat has an axial connection part and a radial connection part at both axial ends respectively. An external sleeve with a staggered fitting and fixation is provided at the radial connection part. An internal sleeve is provided between the axial connection part and the piston rod, and the internal sleeve is also provided with a fastening hole axially.

[0008] Sealing rings are provided between the radial connection part and the external sleeve, and between the radial connection part and the piston rod.

[0009] The ring grooves and the piston rings are arranged in pairs respectively, and an overflow groove is further provided on the piston seat between the ring grooves.

[0010] Advantages of the present utility model: The water-cooled cylinder provided by the present utility model expands the water-cooled contact surface, improves the water-cooled cooling effect, optimizes and upgrades the piston structure, improves the dust-proof and waterproof sealing performance, and is also designed with a buffer ring to reduce the wear and consumption at the junction, thereby improving the overall service life of the product, and having practicability and economy. Description of the Drawings

[0011] Figure 1 It is a structural schematic diagram of the present utility model. Detailed Embodiment

[0012] As Figure 1 shown, a water-cooled cylinder includes a piston rod 1 and a cylinder block 2. The cylinder block 2 is provided with an active cavity 3 arranged along the axis and for the piston rod 1 to insert. The center of the active cavity 3 has a piston cavity 4 with a diameter larger than that of both ends. The piston cavity 4 is the main active space in the middle section of the active cavity 3, and both ends are the active and installation spaces for the piston rod 1. A cylinder sleeve 5 sleeved outside the piston rod 1 is provided in the piston cavity 4. The piston cavity 4 is divided into an inner cavity 6 and an outer cavity 7 through the cylinder sleeve 5. Two water interfaces 8 and air interfaces 9 are provided at the top of the cylinder block 2 respectively. The water interface 8 is communicated with the outer cavity 7, and the air interface 9 is communicated with the inner cavity 6. The design of the cylinder sleeve 5 separates the water and gas spaces, and at the same time maximizes the heat dissipation area in this radial direction.

[0013] The piston cavity 4 is provided with a fixing groove 10 for installing the cylinder sleeve 5 on the cavity wall. A sealing ring 11 is provided in the fixing groove 10. A buffer ring 12 and a dust-proof ring 13 are provided between the piston rod 1 and the active cavity 3. The fixing groove 10 is equivalent to inserting the cylinder sleeve 5 therein, and during assembly, the front cylinder head 18 and the rear cylinder head 20 can be installed successively. The sealing ring 11 mainly plays a role in preventing water leakage, the buffer ring 12 plays a role in elastic damping, shock absorption and wear resistance, and the dust-proof ring 13 is mainly used to prevent external impurities and dust from entering the active cavity 3 and affecting the use. The multiple matching structure design greatly improves the sealing, dust-proof and wear-resistant performance.

[0014] A piston seat 14 is fixedly assembled on the piston rod 1. Balance grooves 15 are provided on the axial end faces at both ends of the piston seat 14, and a ring groove 16 and a piston ring 17 placed in the ring groove 16 are provided on the radial end face of the piston seat 14. The balance grooves 15 improve the stability of the piston seat 14 during use, and also allow gas to enter the balance grooves 15 to increase the force in the relative radial direction and reduce the vibration in all directions.

[0015] The cylinder block 2 includes a front cylinder head 18, a cylinder barrel 19, and a rear cylinder head 20 that are fixedly connected by bolts. The water interface 8 is provided at the top of the cylinder barrel 19, and the air interfaces 9 are respectively provided at the tops of the front cylinder head 18 and the rear cylinder head 20. The end of the movable cavity 3 is provided at the rear cylinder head 20, the dust-proof ring 13 is only provided at the front cylinder head 18, and the buffer ring 12 is provided at both the front cylinder head 18 and the rear cylinder head 20. Only the relative front end of the movable cavity 3 is for the piston rod 1 to insert, and other positions can be regarded as sealed, which is beneficial to improving the overall structural performance and does not affect the rapid assembly and use.

[0016] The piston seat 14 respectively has an axial connection part 21 and a radial connection part 22 at both axial ends. An external connecting sleeve 23 is provided at the radial connection part 22 with a staggered fitting and fixation. An internal connecting sleeve 24 is provided between the axial connection part 21 and the piston rod 1, and a fastening hole 25 is further provided on the internal connecting sleeve 24 in the axial direction. The radial connection part 22 and the external connecting sleeve 23 strengthen the fixation of the piston seat 14 in the radial direction, while the axial connection part 21 and the internal connecting sleeve 24 improve the axial connection tightness, which is achieved by a staggered fitting method, that is, a stepped staggered fitting structure. In addition, the design of the fastening hole 25 can also be used for axially installing a flange for blocking connection or adopting other fastening methods, and no more elaboration and limitation are made here. Sealing rings 11 are provided between the radial connection part 22 and the external connecting sleeve 23, and between the radial connection part 22 and the piston rod 1 to strengthen the local structural sealing performance. The ring grooves 16 and the piston rings 17 are each provided in pairs, and an overflow groove 26 is further provided on the piston seat 14 between the ring grooves 16. If there is liquid leakage to this place, it can be intercepted to improve the sealing performance by using the liquid tension. It should be noted that the ring groove 16 and other related layouts adopt a double guarantee of rubber sealing and labyrinth sealing. The labyrinth sealing realizes the sealing effect even if the medium passes through a tortuous and narrow channel, and no more details are described here.

[0017] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. At the same time, the basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art of this industry should understand.

Claims

1. A water-cooled cylinder, comprising a piston rod and a cylinder body, characterized in that: The cylinder body is provided with an active cavity arranged along the axis and for the piston rod to be inserted, and the center of the active cavity has a piston cavity with a diameter larger than the two end portions, and the piston cavity is provided with a cylinder sleeve sleeved on the outside of the piston rod, and the piston cavity is divided into an inner cavity and an outer cavity by the cylinder sleeve, and two water interfaces and air interfaces are provided at the top of the cylinder body, and the water interface and the outer cavity are connected, and the air interface and the inner cavity are connected, and the piston cavity is provided with a fixing groove for the cylinder sleeve to be installed on the cavity wall, and a sealing ring is provided in the fixing groove, and a buffer ring and a dust ring are provided between the piston rod and the active cavity, and a fixedly assembled piston seat is provided on the piston rod, and the piston seat is provided with balancing grooves on both end faces in the axial direction, and the piston seat is provided with an annular groove and a piston ring placed in the annular groove on the radial end face.

2. A water-cooled cylinder as claimed in claim 1, characterized in that: The cylinder body comprises a front cylinder head, a cylinder barrel and a rear cylinder head which are fixedly connected by bolts. The water interface is arranged at the top of the cylinder barrel, and the air interface is respectively arranged at the top of the front cylinder head and the top of the rear cylinder head.

3. A water-cooled cylinder as claimed in claim 2, characterized in that: The end of the movable cavity is arranged at the rear cylinder cover, the dust ring is only arranged at the front cylinder cover, and the buffer ring is arranged at the front cylinder cover and the rear cylinder cover.

4. A water-cooled cylinder as claimed in claim 1, characterized in that: The piston seat has an axial connection part and a radial connection part at both ends of the axial direction, an outer sleeve is provided at the radial connection part for staggered insertion and fixing, an inner sleeve is provided between the axial connection part and the piston rod, and a fastening hole is also provided in the axial direction of the inner sleeve.

5. A water-cooled cylinder as claimed in claim 4, characterized in that: A sealing ring is arranged between the radial connection part and the external sleeve, and between the radial connection part and the piston rod.

6. A water-cooled cylinder as claimed in claim 1, characterized in that: The annular grooves and the piston rings are arranged in pairs, and the piston seat is further provided with overflow grooves between the annular grooves.

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