Hydraulic cylinder for machine tool

Abstract

The utility model discloses a hydraulic oil cylinder for machine tools, comprising: a cylinder barrel, a hydraulic mechanism and a buffer mechanism; the hydraulic mechanism is installed on the cylinder barrel, the hydraulic mechanism comprises a sealing cover, a piston rod is slidably connected to the sealing cover, a piston is fixed at one end of the piston rod, a sealing ring is installed on the piston, a first oil pipeline is installed on the cylinder barrel, a second oil pipeline is installed at the end away from the cylinder barrel, and a sealing layer is installed between the sealing cover and the piston rod. The buffer mechanism is installed inside the cylinder barrel, the buffer mechanism comprises a pair of support frames, a buffer frame is slidably connected to the support frame, an inner cavity is drilled on the buffer frame, a plurality of through holes are drilled on the side wall of the inner cavity, and an extrusion plate is slidably connected to the side walls of the pair of inner cavities. Compared with the prior art, the hydraulic oil cylinder for machine tools of the utility model can buffer the piston inside the hydraulic oil cylinder, so that the piston is not easy to collide with the side wall of the cylinder barrel, so that the piston is not easy to be damaged, and the hydraulic system can remain stable.

Description

Technical Field

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

[0002] Hydraulic cylinders are an indispensable part of hydraulic systems. They convert hydraulic energy into mechanical energy to achieve reciprocating linear motion or rotary motion of various mechanical equipment. Hydraulic cylinders are widely used in metallurgy, lifting, mining, machine tools and other industries, especially in the field of machine tool manufacturing.

[0003] The hydraulic cylinder is mainly composed of cylinder barrel, piston, piston rod, sealing device, buffer device and exhaust device. The cylinder barrel is usually made of seamless steel pipe, and the inner hole is processed to a very high surface finish to reduce internal friction and extend the life of the seal. Most pistons are made of cast iron or steel, and the piston is fixed to the piston rod by various methods. The sealing device usually includes dust rings, main seals, etc. to prevent internal and external leakage of hydraulic oil. The buffer device is an optional accessory on most cylinders and can usually be added without changing the outline size.

[0004] In the prior art, when the hydraulic cylinder is controlling the movement of the piston rod and the internal piston, due to the high pressure inside the hydraulic cylinder, the piston is prone to collide with the side wall of the cylinder when moving to one end, which not only affects the stability and working efficiency of the hydraulic system, but also easily damages the piston, affecting the production operation of the machine tool and causing economic losses.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a hydraulic cylinder for machine tools.

[0006] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0007] The utility model aims to provide a hydraulic oil cylinder for a machine tool, which can solve the problem that a piston inside the hydraulic oil cylinder easily collides with a cylinder barrel side wall.

[0008] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides a hydraulic cylinder for a machine tool, comprising: a cylinder barrel, a hydraulic mechanism and a buffer mechanism;

[0009] The hydraulic mechanism is installed on the cylinder barrel, and the hydraulic mechanism includes a sealing cover, a piston rod is slidably connected to the sealing cover, a piston is fixed at one end of the piston rod, and a sealing ring is installed on the piston;

[0010] The buffer mechanism is installed inside the cylinder and comprises a pair of support frames. A buffer frame is slidably connected to the support frame. An inner cavity is bored on the buffer frame, and a plurality of through holes are bored on the side wall of the inner cavity.

[0011] In one or more embodiments of the present invention, a first oil delivery pipe is installed on the cylinder barrel, and hydraulic oil can be delivered to the inside of the cylinder barrel through the first oil delivery pipe, and the hydraulic oil inside the cylinder barrel can flow out through the first oil delivery pipe.

[0012] In one or more embodiments of the present invention, a second oil pipe is installed at the end away from the cylinder, and hydraulic oil can be transported to the inside of the cylinder through the second oil pipe, and the hydraulic oil inside the cylinder can flow out through the second oil pipe.

[0013] In one or more embodiments of the present invention, a sealing layer is installed between the sealing cover and the piston rod, and the sealing layer can seal the gap between the sealing cover and the piston rod, so that the hydraulic oil inside the cylinder is not easy to leak.

[0014] In one or more embodiments of the present invention, a pair of buffer frames are both fixed with a support plate, and the support plate is used to support the buffer frame and the spring.

[0015] In one or more embodiments of the present invention, a pair of side walls of the inner cavity are slidably connected with an extrusion plate, and the extrusion plate is used to block the air inside the inner cavity.

[0016] In one or more embodiments of the present invention, a spring is installed between a pair of the support plates and the extrusion plate, and the spring can push the extrusion plate to move, so that the extrusion plate can squeeze out the hydraulic oil inside the inner cavity.

[0017] In one or more embodiments of the utility model, a pair of sealing rings are installed on a pair of the extrusion plates, and the sealing rings can seal the gap between the buffer frame and the extrusion plate, so that the air inside the inner cavity is not easy to enter the support frame.

[0018] In one or more embodiments of the present invention, a pair of sealing gaskets are installed between the support frame and the buffer frame, and the sealing gaskets are used to seal the gap between the support frame and the buffer frame, so that the hydraulic oil inside the cylinder is not easy to enter the support frame.

[0019] In one or more embodiments of the utility model, a pair of the buffer frames are fixed with a plurality of protrusions, which can be supported on the side walls of the grooves, so as to support the buffer frames. A pair of the support frames are each opened with a plurality of grooves, and the inside of the grooves are used to place the protrusions.

[0020] Compared with the prior art, the hydraulic oil cylinder for machine tools of the utility model can buffer the piston inside the hydraulic oil cylinder, so that the piston is not easy to collide with the side wall of the cylinder barrel, thereby making the piston less likely to be damaged and allowing the hydraulic system to remain stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a cross-sectional view of a hydraulic cylinder for a machine tool in one embodiment of the utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure shown in FIG.

[0024] Figure 3 The present invention is a three-dimensional diagram of a hydraulic cylinder for a machine tool in one embodiment of the present invention.

[0025] Description of main reference numerals:

[0026] 1-cylinder, 2-hydraulic mechanism, 201-sealing cover, 202-piston rod, 203-piston, 204-sealing ring, 205-first oil pipeline, 206-second oil pipeline, 207-sealing layer, 3-buffer mechanism, 301-support frame, 302-buffer frame, 303-inner cavity, 304-through hole, 305-support plate, 306-extrusion plate, 307-spring, 308-sealing ring, 309-sealing gasket, 310-bump, 311-groove. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] like Figures 1 to 3 As shown, a hydraulic cylinder for a machine tool in one embodiment of the utility model comprises: a cylinder barrel 1, a hydraulic mechanism 2 and a buffer mechanism 3.

[0029] like Figure 3 As shown, the cylinder barrel 1 is used to place hydraulic oil inside, and the cylinder barrel 1 can support the sealing cover 201, the sealing ring 204 and a pair of support frames 301. The hydraulic mechanism 2 is installed on the cylinder barrel 1, and the hydraulic mechanism 2 includes a sealing cover 201, which can block the opening on the cylinder barrel 1.

[0030] like Figure 1 As shown, a piston rod 202 is slidably connected to the sealing cover 201, and the piston rod 202 can move with the piston 203. A piston 203 is fixed to one end of the piston rod 202, and the piston 203 can be pushed and moved by the hydraulic oil inside the cylinder 1, thereby driving the piston rod 202 to move. A sealing ring 204 is installed on the piston 203, and the sealing ring 204 can seal the gap between the cylinder 1 and the piston 203, so that the hydraulic oil inside the cylinder 1 can push the piston 203 to move.

[0031] like Figure 3 As shown, a first oil delivery pipe 205 is installed on the cylinder barrel 1, through which hydraulic oil can be delivered to the inside of the cylinder barrel 1, and the hydraulic oil inside the cylinder barrel 1 can flow out through the first oil delivery pipe 205. A second oil delivery pipe 206 is installed at one end of the cylinder barrel 1 away from 205, through which hydraulic oil can be delivered to the inside of the cylinder barrel 1, and the hydraulic oil inside the cylinder barrel 1 can flow out through the second oil delivery pipe 206.

[0032] like Figures 1 to 3 As shown, a sealing layer 207 is installed between the sealing cover 201 and the piston rod 202. The sealing layer 207 can seal the gap between the sealing cover 201 and the piston rod 202, so that the hydraulic oil inside the cylinder 1 is not easily leaked.

[0033] like Figure 2 As shown, the buffer mechanism 3 is installed inside the cylinder 1, and the buffer mechanism 3 includes a pair of support frames 301, and the support frames 301 are used to support the buffer frame 302. The buffer frame 302 is slidably connected to the support frame 301, and the buffer frame 302 is used to support the extrusion plate 306.

[0034] like Figure 2 As shown, the buffer frame 302 is provided with an inner cavity 303, and the inner cavity 303 is used to place the extrusion plate 306 and the spring 307. A plurality of through holes 304 are provided on the side wall of the inner cavity 303, through which the hydraulic oil in the support frame 301 can enter the inner cavity 303, and the hydraulic oil in the through holes 304 can return to the support frame 301.

[0035] like Figure 2As shown, a pair of buffer frames 302 are both fixed with support plates 305, and the support plates 305 are used to support the buffer frames 302 and springs 307. A pair of side walls of the inner chambers 303 are both slidably connected with extrusion plates 306, and the extrusion plates 306 are used to block the air inside the inner chambers 303. A spring 307 is installed between the pair of support plates 305 and the extrusion plates 306, and the spring 307 can push the extrusion plates 306 to move, so that the extrusion plates 306 can squeeze out the hydraulic oil inside the inner chamber 303.

[0036] like Figure 2 As shown, a pair of sealing rings 308 are installed on each of the pair of extrusion plates 306, and the sealing rings 308 can seal the gap between the buffer frame 302 and the extrusion plate 306, so that the air inside the inner cavity 303 is not easy to enter the support frame 301. A pair of sealing gaskets 309 are installed between each of the pair of support frames 301 and the buffer frame 302, and the sealing gaskets 309 are used to seal the gap between the support frame 301 and the buffer frame 302, so that the hydraulic oil inside the cylinder 1 is not easy to enter the support frame 301.

[0037] like Figures 1 to 3 As shown, a pair of buffer frames 302 are fixed with multiple protrusions 310, which can be supported on the side walls of the grooves 311, so as to support the buffer frames 302. A pair of support frames 301 are each provided with multiple grooves 311, and the grooves 311 are used to place the protrusions 310.

[0038] When in use, the hydraulic oil is delivered into the cylinder 1 through the first oil delivery pipe 205 or the second oil delivery pipe 206, so that the pressure on one side of the piston 203 is higher, thereby pushing the piston 203 to move, and the piston 203 can push the hydraulic oil on the side with lower pressure to flow out through the second oil delivery pipe 206 or the first oil delivery pipe 205;

[0039] The hydraulic oil on the side with smaller pressure is less likely to generate a large pressure to push the support plate 305 to move. When the piston 203 contacts the support plate 305, the piston 203 can drive the support plate 305 to move, thereby pushing the buffer frame 302 to move, so that the buffer frame 302 can squeeze the hydraulic oil inside the support frame 301, and the hydraulic oil inside the support frame 301 slowly enters the inner cavity 303 through the multiple through holes 304, so that the hydraulic oil inside the support frame 301 can buffer the force on the buffer frame 302 and the support plate 305, thereby buffering the piston 203;

[0040] The hydraulic oil in the support frame 301 can push the extrusion plate 306 to move when entering the inner cavity 303, and the side of the extrusion plate 306 close to the multiple springs 307 and the support plate 305 are both air. Since the density of air is relatively small, the extrusion plate 306 can compress the air under the push of the hydraulic oil, so that the hydraulic oil can be stored in the inner cavity 303;

[0041] When the piston 203 no longer squeezes the support plate 305, the spring 307 can push the squeezing plate 306 to move, thereby squeezing the hydraulic oil inside the inner cavity 303 and returning the hydraulic oil to the support frame 301, thereby resetting the buffer frame 302 and the support plate 305, making it easier to buffer the piston 203 again.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A hydraulic cylinder for a machine tool, characterized in that: include: Cylinder barrel; A hydraulic mechanism is mounted on the cylinder barrel, the hydraulic mechanism comprises a sealing cover, a piston rod is slidably connected to the sealing cover, a piston is fixed at one end of the piston rod, and a sealing ring is mounted on the piston; The buffer mechanism is installed inside the cylinder, and the buffer mechanism includes a pair of support frames, the support frames are slidably connected with a buffer frame, the buffer frame is provided with an inner cavity, and the side wall of the inner cavity is provided with a plurality of through holes.

2. A hydraulic cylinder for machine tools according to claim 1, characterized in that: A first oil delivery pipe is installed on the cylinder barrel.

3. A hydraulic cylinder for machine tools according to claim 2, characterized in that: A second oil delivery pipe is installed at the end away from the cylinder.

4. The hydraulic cylinder for machine tools according to claim 1, characterized in that: A sealing layer is installed between the sealing cover and the piston rod.

5. The hydraulic cylinder for machine tools according to claim 1, characterized in that: A supporting plate is fixed on each of the pair of buffer frames.

6. The hydraulic cylinder for machine tools according to claim 5, characterized in that: A pair of side walls of the inner cavity are both slidably connected with an extrusion plate.

7. The hydraulic cylinder for machine tools according to claim 6, characterized in that: Springs are installed between a pair of the support plates and the extrusion plates.

8. The hydraulic cylinder for machine tools according to claim 6, characterized in that: A pair of sealing rings are installed on each of the pair of extrusion plates.

9. The hydraulic cylinder for machine tools according to claim 1, characterized in that: A pair of sealing pads are installed between the pair of support frames and the buffer frame.

10. The hydraulic cylinder for machine tools according to claim 1, characterized in that: A pair of buffer frames are each fixed with a plurality of protrusions, and a pair of support frames are each chiseled with a plurality of grooves.

Images