Axis bushing of static pressure main shaft

Abstract

According to the technical scheme, the static pressure main shaft axis lining comprises an axis and a lining body, the lining body is arranged on the axis, at least one set of multiple holes are formed in the lining body in the direction of the two ends of the axis at equal intervals, and the holes are communicated with the axis. The diameter sum of the holes in the direction is one half to two thirds of the length of the lining located on the axis, pistons are plugged in the holes, the gaps between the pistons and the holes are smaller than 0.03 mm, the pistons are made of copper materials, a sleeve is further arranged on the lining, the axis penetrates through the sleeve, and the inner wall of the sleeve abuts against the holes. Compared with the prior art, the utility model has the advantages that buffering can be carried out through the hole and the piston when the pressure is too large, the main shaft is prevented from being held tightly, the stability and the safety performance of the product are further improved, and meanwhile, the piston can be shared during buffering through the large-area hole, so that larger force can be buffered, and the service life of the product is prolonged. And the method is suitable for more conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of static pressure main shafts, in particular to a static pressure main shaft axis bushing. Background Art

[0002] When the static pressure spindle is running, a layer of oil film will be generated, so that the spindle has no contact wear, so the accuracy is better, and the service life is long and maintenance is simple. When the dynamic and static pressure spindle is working, the oil supply pump is started first, and the oil enters the oil chamber through the oil filter and the throttle. At this time, a layer of oil film is generated on the spindle diameter surface to support, lubricate and cool the spindle. Due to the action of the throttle, the oil lifts the spindle, and the oil returns to the oil tank through the oil return hole and the oil return pump. Then the grinding head motor is started, and the spindle rotates. Using the wedge-shaped oil chamber structure that is easy to produce dynamic pressure effect, the spindle enters high-speed steady-state rotation, forming a strong rigidity dynamic pressure oil film to balance the workload under high-speed operation.

[0003] However, this structure has high requirements on oil quality and may also cause the main shaft to be clamped due to thermal expansion and contraction, which may lead to safety accidents. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a static pressure spindle shaft center bushing.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A hydrostatic spindle axis bushing comprises an axis and a bushing, wherein the bushing is arranged on the axis, and the bushing is provided with at least one group of holes arranged at equal distances along the two ends of the axis, and the sum of the diameters of the holes in this direction is one half to two thirds of the length of the bushing on the axis, pistons are plugged in the holes, and the gap between the pistons and the holes is less than 0.03mm, and a sleeve is also provided on the bushing which is penetrated by the axis, and the inner wall of the sleeve contacts the hole.

[0007] Preferably, when the axis is placed horizontally, a group of holes is opened on the bushing, and the group of holes is located at the top of the bushing.

[0008] Preferably, when the axis is placed vertically, at least three groups of holes are provided on the bushing at equal distances.

[0009] Preferably, the centers of the holes in each group are located on the same vertical line or the same horizontal line.

[0010] Preferably, the holes in each group are arranged in a staggered manner.

[0011] Preferably, each group of several holes are continuously staggered and arranged along the same direction.

[0012] Preferably, each group of holes is staggeredly arranged along a wave shape.

[0013] Preferably, the piston is made of copper.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model ensures that the pressure can be buffered when it is too high through holes and pistons to avoid holding the main shaft, thereby improving the stability and safety performance of the product;

[0016] 2. The utility model ensures that the piston can share the force when buffering by means of holes arranged over a large area, thereby being able to buffer a larger force, and thus being applicable to more situations, thus increasing the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the accompanying drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components.

[0018] in:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model in which the axis is placed vertically;

[0021] Figure 3 This is a schematic diagram of the structure of the utility model with the axis placed horizontally;

[0022] Figure 4 This is a schematic diagram of the structure of the wavy hole of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the continuous dislocation of holes in the utility model.

[0024] Notes in the figure: 1. Axis; 2. Bushing; 3. Hole; 4. Piston; 5. Sleeve. DETAILED DESCRIPTION

[0025] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0026] like Figure 1As shown, the static pressure main shaft axis bushing of the utility model includes an axis 1, and a bushing 2 is arranged on one side of the axis 1. Figure 2 As shown, the bushing 2 is provided with a plurality of holes 3, each of which is plugged with a piston 4, which is made of copper, and the gap between the piston 4 and the hole 3 is less than 0.03 mm. Figure 1 As shown, a sleeve 5 is also provided on the bushing 2, and the sleeve 5 is penetrated by the shaft 1. The inner wall of the sleeve 5 abuts against the hole 3. The sleeve 5 abuts against the hole 3 to prevent the piston 4 from being rushed out of the hole 3 by the pressure. At the same time, the piston 4 provides a buffer when the pressure is too high to avoid holding the main shaft, thereby improving the stability and safety performance of the product.

[0027] like Figure 3 As shown, when the shaft 1 is placed horizontally, a row of three holes 3 are opened at equal distances on the top of the bushing 2 along the two ends of the shaft 1. Due to the effect of gravity, when the shaft 1 is placed horizontally, only the holes 3 and the piston 4 need to be opened on the top, which reduces the cost. Figure 2 As shown, when the axis 1 is placed vertically, six rows of eighteen holes 3 are equidistantly provided on the bushing 2 along the two ends of the axis 1. By equidistantly providing six rows of holes 3 around the axis 1, it is ensured that the downward pressure of gravity is balanced and will not cause the axis 1 to tilt, thereby improving the stability of the axis 1. The sum of the diameters of the three holes 3 in each row or column is two-thirds of the length of the bushing 2 on the axis 1. The large-area arrangement of the holes 3 ensures that the piston 4 can be shared when buffering, thereby buffering a larger force, thereby being suitable for more situations and increasing the scope of application.

[0028] like Figure 3 As shown, the centers of the three holes 3 in each row or column can be located on the same horizontal line or the same vertical line, respectively. The distance on the same horizontal line or the same vertical line is convenient to measure, which is conducive to the equal distance setting between the holes 3, and further conducive to production. Figure 5 As shown, the three holes 3 in each row or column can also be continuously staggered in the same direction, and the center of the middle hole 3 in each row is located at the highest point. The staggered arrangement increases the force range on the basis of increasing the force area by using the number, so that the holes 3 are arranged more evenly on the bushing 2, so that the piston 4 is more evenly stressed during buffering, which is beneficial to the buffering work of the piston 4. Figure 4 As shown, the three holes 3 in each row or column can also be arranged in a wave-like staggered manner, and the midpoint of the line connecting the centers of the holes 3 in each row is located at the highest point. The force range is increased by the staggered arrangement. At the same time, the three holes 3 are arranged in a wave-like manner, resulting in a phenomenon of different numbers on both sides, so that one side can be pressurized more, which is applicable to more situations and increases the scope of application.

[0029] After the oil passes through the piston 4, the piston 4 presses down the axis 1, which can better stabilize the axis 1 and improve the rigidity of the axis 1. During processing, the accuracy can be effectively guaranteed, and the loss of the grinding wheel caused by the deviation of the axis 1 caused by the excessive gap can be reduced, and the loss of the grinding wheel can be shortened by 30%.

[0030] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. Hydrostatic spindle shaft bushing, characterized by: The invention comprises an axis (1) and a bushing (2), wherein the bushing (2) is arranged on the axis (1), and the bushing (2) is provided with at least one group of holes (3) arranged at equal distances along the two ends of the axis (1), and the sum of the diameters of the holes (3) in this direction is one half to two thirds of the length of the bushing (2) on the axis (1), and the holes (3) are each plugged with a piston (4), and the gap between the piston (4) and the hole (3) is less than 0.03 mm. The bushing (2) is also provided with a sleeve (5) penetrated by the axis (1), and the inner wall of the sleeve (5) abuts against the hole (3).

2. The hydrostatic spindle bushing according to claim 1, characterized in that: When the axis (1) is placed horizontally, a group of holes (3) is opened on the bushing (2), and the group of holes (3) is located at the top of the bushing (2).

3. The hydrostatic spindle bushing according to claim 1, characterized in that: When the axis (1) is placed vertically, at least three groups of holes (3) are provided on the bushing (2) at equal distances.

4. The hydrostatic spindle bushing according to any one of claims 1 to 3, characterized in that: The centers of each group of holes (3) are located on the same vertical line or the same horizontal line.

5. The hydrostatic spindle bushing according to any one of claims 1 to 3, characterized in that: Each group of several holes (3) is arranged in a staggered manner.

6. The hydrostatic spindle bushing according to claim 5, characterized in that: Each group of several holes (3) are continuously staggered and arranged along the same direction.

7. The static pressure spindle shaft bushing according to claim 5, characterized in that: Each group of several holes (3) is arranged in a wave-like staggered manner.

8. The static pressure spindle shaft bushing according to claim 1, characterized in that: The piston (4) is a piston (4) made of copper.

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