TWI381109B - Oil - free hydraulic platform with oil - free - Google Patents

Description

Oil-free needle hydrostatic sliding track platform

The invention relates to an oil-free needle hydrostatic sliding track platform, in particular to an oil-free needle hydrostatic sliding track platform, which uses a pipeline built in a load platform to inject hydraulic oil through a fixed seat thereof, and a load platform and a fixed seat thereof. An oil film is formed on the contact surface with the rail to minimize the friction of the workpiece. Since the load platform does not require the design and assembly requirements of the oil needle, the current load-bearing area and the fixed hole position and depth limited by the oil needle can be greatly improved to improve the application of the load platform.

The precision machining tool machine, the accuracy of the sliding of the track and the accuracy of the movement will directly affect the machining accuracy of the machine. Therefore, the accuracy of the precision of the precision tool machine is very strict, and the accuracy of the maintenance is the most important. It is determined by the wear resistance of the guide rail. It is related to the friction characteristics of the guide rail, the material of the guide rail, the processing method and the stress state. In addition, the residual stress on the guide rail and the base also deforms the guide rail and affects the guide rail. Accuracy retention.

The guide rail activity requires the addition of lubricant as its lubrication condition, but the work table of the traditional tool machine is mostly a hybrid friction mechanism, and the friction force of the machine table changes greatly. Under long-term use, it is easy to form wear and cause gaps and Scratches, the resulting workpiece loss problem also increases, making the quality of the product difficult to control and the stick-slip (or crawling phenomenon) generated by the machine tool during low-speed movement or micro-movement also affects the smoothness of the guide rail. The key to sex.

The use of hydrostatic guides often requires the use of oil needles (throttle or throttle) to adjust the oil chamber pressure to support the platform weight and load, and to ensure the accuracy of the platform movement. Furthermore, the hydrostatic platform with oil needle is quite complicated in processing engineering and requires the purchase of oil needles. The cost is high. When the oil needle is damaged or damaged, it has to be adjusted from the beginning, which is time-consuming and laborious. .

In addition, most of the current hydrostatic guide rail lateral mounts are subject to the current processing technology, so two-piece design is adopted. However, when the oil pressure is too large, the intermediate fixing seat may cause a displacement due to insufficient stress, thereby affecting the accuracy.

It can be seen that there are still many shortcomings in the above-mentioned household items, which is not a good designer and needs to be improved.

In view of the above-mentioned shortcomings derived from the above-mentioned static oil-free sliding track platform without oil needles, the inventor of the present invention has improved and innovated, and after years of painstaking research, he finally succeeded in research and development of this type of oil-free needle hydrostatic. Slide the track platform.

The object of the present invention is to provide a hydrostatic sliding track platform without oil needles, which is designed to save the time and cost by adjusting the oil pressure on the oil needle of the machine tool through the design of the oil-free needle. Good solution for the cost of the workpiece.

The second object of the present invention is to provide an oil-free needle hydrostatic sliding track platform, which is operated through its oil chamber and oil supply system, so that the hydraulic oil is hydraulically pumped to the inside of the load platform and the fixed seat. And injected into the oil chamber, the hydraulic oil is outwardly diffused to form an oil film to form an effective bearing area, and the load platform and its fixed seat are operated on the rail seat under the optimal condition by the pressure of the bearing area.

Another object of the present invention is to provide an oil-free needle hydrostatic sliding track platform through which an oil supply unit forms an oil film on the contact surface of the load platform and the rail seat, and rubs against the platform when the vehicle moves. The coefficient is extremely small and the drive power will be minimized.

Another object of the present invention is to provide an oil-free needle hydrostatic sliding track platform, wherein the oil film formed by the contact surface between the load platform and the rail seat does not produce a slippage of the oil film at a lower speed. .

A further object of the present invention is to provide a hydrostatic sliding track platform without oil needles, which is designed such that the fixing seat is L-shaped to increase rigidity and is easy to manufacture, because the lower fixing seat and the rail seat are in a close state. The pressure difference will generate outward pressure, which will cause the displacement of the fixed seat, resulting in uneven oil film and affecting its accuracy.

Another object of the present invention is to provide a hydrostatic sliding track platform without oil needles, which adopts a configuration in which the fixing seats are symmetric and parallel, and can bear the load in the forward and reverse directions, especially when subjected to a bias load, thereby providing The stability of tool machining accuracy.

An oil-free needle hydrostatic sliding track platform capable of achieving the above object includes: a load platform having a bottom portion extending at least downwardly from a positioning portion, and at least one surface of the positioning portion is formed with a plurality of first oil chambers and a joint portion An oil chamber pipe; the fixing seat has at least one surface in contact with the bottom of the load platform and the positioning portion, and a plurality of second oil chambers and a third oil chamber are also arranged on the inner side of the fixing seat, and the oil chambers are connected with the oil passages. The oil passage is also connected to the pipeline; the rail seat is disposed between the load platform and the fixed seat; and the oil supply unit provides the hydraulic oil introduction pipeline and the oil passage to enter the first oil chamber of the load platform and the second seat of the fixed seat The oil chamber and the third oil chamber fixing seat; the invention utilizes the static pressure of the liquid medium by the Pascal's principle to complete the storage, transmission and amplification of energy, so as to realize the light and maximum function mechanism of the mechanical equipment. Through the operation principle of the oil supply unit to the oil circuit system, the hydraulic oil is injected into the pipeline of the load platform and the fixed seat, and then the oil chamber and the rail built in the fixed seat The gap space of the seat creates a pressure that allows the platform and the mount to move smoothly over the track base.

Referring to FIG. 1 , an oil-free needle hydrostatic sliding track platform provided by the present invention comprises: a load platform (1), two fixing seats (2), and a rail seat (3); Please refer to Figure 6. There are several screw holes (14) above the load platform (1). The screw holes (14) penetrate the body of the load platform (1), and then pass through the bolts and then the two fixed seats. 2) The screw holes (24) on the side serve as a combination.

Referring to Figure 1, in addition to the plurality of screw holes (14), the load platform (1) is provided with a plurality of pipes (13) for supplying the oil supply unit (4) with hydraulic oil.

Referring to FIG. 3 and FIG. 4, in addition to the plurality of screw holes (14) and the plurality of pipes (13), the bottom of the load platform (1) extends at least downwardly from a positioning portion (11). At least one surface of the positioning portion (11) is formed with a first oil chamber (12), and the first oil chamber (12) is a groove of a fixed depth.

Referring to FIG. 6, the fixing seat (2) is disposed on the bottom two sides of the load platform (1) to provide a rail seat (3) parallel to the load platform (1).

Referring to FIG. 5, the fixing seat (2) has an L-shaped shape, and at least one surface is in contact with the bottom of the load platform (1) and the positioning portion (11), and each of the tops is provided with a plurality of screw holes (24). It is a combination of several screw holes (14) above the load platform (1) through the bolts to achieve a close fit; the right side of the right fixed seat (2) and the left fixed seat (2) are provided with a plurality of second The oil chamber (22) and the third oil chamber (23) are shaped as a groove of a fixed depth; and a plurality of oil passages (21) are disposed on the outer sides of the fixing seat (2) for supplying the oil supply unit (4) Injecting hydraulic oil, and the oil passage (21) is in communication with the pipe (13) provided by the load platform (1).

As shown in Figure 7, the screw hole (14) of the load platform (1) and the screw hole (24) of the fixed seat (2) are combined by a bolt, and then the hydraulic oil is injected through the oil supply unit (4). From the pipeline (13) of the load platform (1), the inside of the oil passage (21) which fills the entire pipeline (13) and the fixed seat (2), thereby conveying hydraulic oil to the first oil chamber (12), the second The oil chamber (22) and the third oil chamber (23), and the gap space with the rail seat (3) is used to form an oil film and a load area.

In addition, the pipeline (13) provided on the load platform (1) and the plurality of oil passages (21) disposed on the outer side of the fixed seat (2) can be designed as a contraction section with a decreasing diameter (as shown in FIG. 8). When the oil supply unit (4) injects hydraulic oil, due to the decreasing design of the pipe (13), the flow rate = flow rate × cross-sectional area; from the formula, it can be seen that the flow rate is proportional to the flow rate and the cross-sectional area, due to the pressure effect The flow rate in the pipe (13) does not change substantially, but the outlet area becomes small, so that the hydraulic oil can be filled with the first oil chamber (12) and the second oil chamber on average with a small flow rate and a relatively fast speed. 22) and the third oil chamber (23).

Through the first oil chamber (12) of the load platform (1), and the second oil chamber (22) and the third oil chamber (23) of the fixed seat (2), the gap space formed by the rail seat (3) The oil film and load area are separated from the load platform (3) by the load platform (1), the right mount (2) and the left mount (2) using the pressure of the oil film and the load cell.

The first oil chamber (12) of the load platform (1) and the second oil chamber (22) and the third oil chamber (23) of the fixed seat (2) are formed by the gap space of the rail seat (3) In the oil film and load-bearing area, the load platform (1) and right fixed are fixed due to the action of the oil film due to the contact surface between the load platform (1), the right fixed seat (2) and the left fixed seat (2) and the rail seat (3). The friction between the seat (2) and the left mount (2) and the rail seat (3) is minimized.

The hydrostatic sliding track platform of the oil-free needle provided by the invention has the following advantages when compared with the aforementioned cited documents and other conventional techniques:

1. Its oil-free needle design eliminates the complicated work of oil pressure adjustment. In the modern society that pursues high efficiency, its oil-free needle hydrostatic sliding track platform design is a pioneering work.

2. The contact surface between the platform and the rail seat, through the design of the oil chamber, the oil film and load area generated, in addition to the friction coefficient is extremely small, so that the viscosity of the oil film is not affected by the speed, even when moving at low speed, There is no glue slippage.

3. The lower fixing seat is designed in an L shape, and the system is combined with the rail seat. Because the fixing seat and the rail seat are in close contact state, due to the pressure difference relationship, the outward pressure is generated, thereby causing The displacement of the fixed seat causes the oil film to be uneven, resulting in accuracy accuracy, and the L-shaped fixed seat design can also strengthen the side stress.

The detailed description of the preferred embodiments of the present invention is intended to be limited to the scope of the invention, and is not intended to limit the scope of the invention. The patent scope of this case.

In summary, this case is not only innovative in terms of space type, but also can enhance the above-mentioned multiple functions compared with the customary items. It should fully meet the statutory invention patent requirements of novelty and progressiveness, and apply for it according to law. This invention patent application, in order to invent invention, to the sense of virtue.

1. . . Load platform

11. . . Positioning department

12. . . First oil chamber

13. . . pipeline

14. . . Screw hole

2. . . Fixed seat

twenty one. . . Oil road

twenty two. . . Second oil chamber

twenty three. . . Third oil chamber

twenty four. . . Screw hole

3. . . Track seat

4. . . Oil supply unit

Figure 1 is a combination view of an oil-free needle hydrostatic sliding track platform of the present invention;

Figure 2 is a perspective exploded view of the top surface of the hydrostatic sliding track platform of the oil-free needle;

Figure 3 is a perspective view of the load platform of the hydrostatic sliding track platform of the oil-free needle;

Figure 4 is a bottom side view of the load platform of the hydrostatic sliding track platform of the oil-free needle;

Figure 5 is a view of the fixed seat of the hydrostatic sliding track platform of the oil-free needle;

Figure 6 is a view showing the combination of the load platform and the fixed seat of the hydrostatic sliding track platform of the oil-free needle;

Figure 7 is a cross-sectional view of the oil passage of the hydrostatic sliding track platform of the oil-free needle;

Fig. 8 is a view showing a contraction section of a hydrostatic sliding track platform of the oil-free needle which is designed to have a decreasing diameter.

1. . . Load platform

11. . . Positioning department

12. . . First oil chamber

13. . . pipeline

14. . . Screw hole

2. . . Fixed seat

twenty one. . . Oil road

twenty two. . . Second oil chamber

twenty three. . . Third oil chamber

twenty four. . . Screw hole

3. . . Track seat

Claims (7)

An oil-free needle-type hydrostatic sliding track platform includes: a load platform having a bottom portion extending at least downwardly from a positioning portion, and at least one surface of the positioning portion is formed with a plurality of first oil chambers and a pipe connecting the first oil chambers; The second fixing seat has at least one surface in contact with the bottom of the load platform and the positioning portion, and also has a plurality of second oil chambers and a third oil chamber on the inner side of the fixing seat, and each oil chamber is connected with an oil passage, and the oil passage is also The pipeline is connected; a rail seat is disposed between the load platform and the fixed seat; and an oil supply unit provides a hydraulic oil introduction pipeline and an oil passage to enter the first oil chamber of the load platform and the second oil chamber of the fixed seat, The third oil chamber fixing seat. The oil-free needle hydrostatic sliding track platform according to claim 1 , wherein the load platform forms a first oil cavity screw hole on a bottom surface of the positioning portion. The oil-free needle hydrostatic sliding track platform according to claim 1 , wherein the inner vertical surface of the fixing seat is formed with a second oil chamber, and the horizontal surface is formed with a third oil chamber. The oil-free needle hydrostatic sliding track platform according to claim 1 , wherein the load platform and the fixing base thereof are designed to use the first oil chamber, the second oil chamber and the third oil chamber to load The gap between the platform, the fixed seat and the rail seat forms an oil film and a load area. If the application is no hydrostatic slide rail of the platform with needle patentable scope of item 1, wherein the outer side is provided with a fixing base oil inlet passage which communicates the inlet system and the oil passage, the oil supply unit as the auxiliary supply Hydraulic oil is used. For example, the oil-free needle hydrostatic sliding track platform described in claim 1 of the patent scope includes two fixed seats in a symmetrical parallel configuration, which functions to withstand the load in the forward and reverse directions, so that the precision of the machine tool Reach the highest. The oil-free needle hydrostatic sliding track platform according to claim 1 , wherein the pipeline provided by the load platform and the plurality of oil passages disposed on the outer side of the fixed seat can be designed to have a decreasing diameter. Shrink the segment.