Machine tool transmission seat bearing lubrication structure

Abstract

The present invention relates to a bearing lubrication structure of a machine tool transmission seat, comprising a transmission seat, an outer spacer ring, an inner spacer ring and a bearing, an oil inlet hole is provided at the middle position of the top of the transmission seat, a bearing pressure cover is provided at the left end, a transmission cavity is formed inside, the outer spacer ring is located directly below the oil inlet hole, a number of oil holes are provided on the outer spacer ring, a groove is formed on the outer ring of the outer spacer ring, a boss is formed on the inner ring, the inner spacer ring is located inside the inner ring of the outer spacer ring, the inner spacer ring is a simple annular structure, the bearing is located on the left and right sides of the outer spacer ring, the bearing comprises an outer ring, an inner ring and a rolling body, an oil guide groove is formed between the outer ring and the inner ring, and the rolling body is located in the oil guide groove. The present invention can not only promote the uniform distribution of the lubricating oil along the circumference of the bearing, but also shorten the time for the bearing to reach full lubrication, thereby improving the lubrication effect by arranging the oil inlet hole at the middle position of the transmission seat and using the outer spacer ring and the inner spacer ring to separate the lubricating oil.

Description

Technical Field

[0001] The invention belongs to the technical field of machine tool cutting and processing, and in particular relates to a bearing lubrication structure for a machine tool transmission seat. Background Art

[0002] Bearings are important components in mechanical equipment that support mechanical rotating bodies, reduce the friction coefficient during movement, and ensure their rotation accuracy. Since the rotating body will generate heat due to friction during rotation, the temperature of the bearing will rise, which will cause bearing wear and deformation. In order to reduce the friction loss of the bearing and extend the service life of the bearing, the bearing is usually lubricated with lubricating oil.

[0003] The existing technology has also conducted long-term exploration on the lubrication problem of the machine tool transmission seat bearing. The lubrication structure that is currently widely used is: an oil inlet hole is opened on the bearing gland at one end of the transmission seat, and the lubricating oil is pumped from the oil inlet hole to the other end of the transmission seat cavity by an oil pump to lubricate the bearing. Although this structure solves the bearing lubrication problem to a certain extent, there are still problems such as insufficient lubrication and uneven lubrication effect, especially for the bearing at the far end of the oil inlet hole. The lubrication effect is poor. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a lubricating structure for a machine tool transmission seat bearing with reasonable structural design, sufficient lubrication and uniform lubrication effect.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problem is: the bearing lubrication structure of the machine tool transmission seat includes a transmission seat, an outer spacer ring, an inner spacer ring and a bearing, characterized in that: an oil inlet hole is provided in the middle position of the top of the transmission seat, a bearing pressure cover is provided at the left end of the transmission seat, a transmission cavity is formed inside, the outer spacer ring, the inner spacer ring and the bearing are all located in the transmission cavity, the outer spacer ring is located directly below the oil inlet hole, a number of oil holes are evenly distributed on the outer spacer ring, a groove with an isosceles trapezoidal cross-section is formed on the outer ring of the outer spacer ring, and the outer A boss with an isosceles trapezoidal cross-section is machined and formed on the inner ring of the spacer ring; the inner spacer ring is located inside the inner ring of the outer spacer ring, the inner spacer ring is a simple annular structure, the thickness of the inner spacer ring is the same as the thickness of the outer spacer ring, the outer diameter D of the inner spacer ring is slightly smaller than the inner diameter C of the outer spacer ring, and the inner diameter E of the inner spacer ring is the same as the inner diameter d of the bearing; the bearing is located on the left and right sides of the outer spacer ring, the bearing includes an outer ring, an inner ring and a rolling body, an oil guide groove is formed between the outer ring and the inner ring, the rolling body is located in the oil guide groove, and the outer diameter a of the bearing is the same as the outer diameter A of the outer spacer ring. The transmission seat of the present invention is sealed by a bearing pressure cover. The lubricating oil enters the transmission cavity from the oil inlet hole under the action of the oil pump, and first flows along the groove to promote the circumferential uniform distribution of the lubricating oil. When passing through the oil hole on the outer spacer ring during the flow, part of the lubricating oil flows along the oil hole into the gap formed between the outer spacer ring and the inner spacer ring. At this time, the boss of the inner ring of the outer spacer ring forms an oil separation ladder, so that the lubricating oil flows from the left and right ends into the oil guide grooves of the adjacent bearings respectively, and gradually flows to the far end, thereby lubricating the bearings.

[0006] Preferably, the number of the oil holes in the present invention is eight.

[0007] Preferably, the minimum angle of the isosceles trapezoid of the groove and the boss is 45°. The boss has a bilaterally symmetrical structure, which can make the amount of lubricating oil flowing into the left and right bearings of the outer spacer ring substantially the same, so that the lubrication effect of the bearings on both sides is substantially the same.

[0008] Preferably, the number of bearings on the left and right sides of the outer spacer ring and the inner spacer ring of the present invention is the same.

[0009] Preferably, the size of the inner diameter C of the outer spacer ring of the present invention is between the sizes b and c of the bearing, and the size of the outer diameter D of the inner spacer ring is between the size c and the inner diameter d of the bearing. Only when the above conditions are met can the lubricating oil smoothly flow from the gap between the outer spacer ring and the inner spacer ring into the oil guide groove of the bearing, and part of the lubricating oil is stored in the gap between the outer spacer ring and the inner spacer ring, thereby shortening the time for the bearing to reach full lubrication when restarting.

[0010] Preferably, the bearing of the present invention is pressed against the outer and inner spacer rings, and the bearings are pressed against each other. The present invention uses a bearing gland to press the bearing against the outer and inner spacer rings, and the bearings against each other, so as to avoid leakage of lubricating oil on the contact surfaces, which would affect the lubrication effect.

[0011] Preferably, the bearing gland and the right side of the transmission seat are both provided with oil outlets. The oil outlets of the present invention are arranged at a position far away from the oil inlet, so that the lubricating oil can be discharged smoothly only after flowing through all the bearings, which is conducive to achieving full lubrication of the bearings.

[0012] Compared with the prior art, the present invention has the following advantages and effects: the present invention arranges the oil inlet hole in the middle position of the transmission seat and the oil outlet on the bearing cover away from the oil inlet hole and on the right side of the transmission seat, and uses outer spacer rings and inner spacer rings to separate the lubricating oil, which not only promotes the uniform distribution of the lubricating oil along the circumference of the bearing, but also shortens the time for the bearing to reach full lubrication, thereby improving the lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the present invention or the solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a schematic cross-sectional structural diagram of an embodiment of the present invention.

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the outer spacer ring of an embodiment of the present invention.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the outer spacer ring of an embodiment of the present invention.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the inner spacer ring according to an embodiment of the present invention.

[0018] Figure 5 It is a schematic diagram of the cross-sectional structure of the inner spacer ring of an embodiment of the present invention.

[0019] Figure 6 It is a schematic diagram of the cross-sectional structure of a bearing according to an embodiment of the present invention.

[0020] Explanation of the accompanying drawings: 1. Transmission seat; 2. Outer spacer ring; 3. Inner spacer ring; 4. Bearing; 5. Oil inlet hole; 6. Bearing cover; 7. Transmission cavity; 8. Oil hole; 9. Outer ring; 10. Groove; 11. Inner ring; 12. Boss; 13. Outer ring; 14. Inner ring; 15. Rolling element; 16. Oil guide groove. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0022] Example

[0023] See also Figures 1 to 6 The machine tool transmission seat bearing lubrication structure of this embodiment includes a transmission seat 1, an outer spacer ring 2, an inner spacer ring 3 and a bearing 4.

[0024] An oil inlet hole 5 is provided at the middle position of the top of the transmission seat 1 of this embodiment. A bearing cover 6 is connected to the left end of the transmission seat 1, a transmission cavity 7 is formed inside, and oil outlets are provided on the bearing cover 6 and on the right side of the transmission seat 1.

[0025] The outer spacer ring 2, the inner spacer ring 3 and the bearing 4 of this embodiment are all installed in the transmission cavity 7. The outer spacer ring 2 is located directly below the oil inlet hole 5. There are eight oil holes 8 evenly distributed on the outer spacer ring 2. The oil holes 8 connect the outer ring 9 and the inner ring 11 of the outer spacer ring 2. The outer ring 9 is processed to form a groove 10 with an isosceles trapezoidal cross section. The inner ring 11 is processed to form a boss 12 with an isosceles trapezoidal cross section. The minimum angle of the isosceles trapezoids of the groove 10 and the boss 12 is 45°. The outer diameter A of the outer spacer ring 2 is the same as the inner diameter of the transmission cavity 7. When the lubricating oil enters the transmission cavity 7 from the oil inlet hole 5 under the action of the oil pump, it will be confined in the groove 10 of the outer spacer ring 2 and flow along the groove 10 to promote the circumferential uniform distribution of the lubricating oil. When passing through the oil hole 8 during the flow process, part of the lubricating oil flows out along the oil hole 8.

[0026] The inner spacer ring 3 of this embodiment is a simple annular structure. The inner spacer ring 3 is installed inside the inner ring 11 of the outer spacer ring 2. Two bearings 4 are respectively provided on the left and right sides of the outer spacer ring 2 and the inner spacer ring 3. The bearing 4 includes an outer ring 13, an inner ring 14 and a rolling body 15. An oil guide groove 16 is formed between the outer ring 13 and the inner ring 14. The rolling body 15 is located in the oil guide groove 16. The bearing 4 is pressed against the outer spacer ring 2 and the bearing 4 under the action of the bearing cover 6 to avoid leakage of lubricating oil at the contact surface and affect the lubrication effect.

[0027] The outer spacer ring 2, the inner spacer ring 3 and the bearing 4 of this embodiment have the following size relationship: the outer diameter A of the outer spacer ring 2 is the same as the outer diameter a of the bearing 4, the thickness of the inner spacer ring 3 is the same as the thickness of the outer spacer ring 2, the outer diameter D of the inner spacer ring 3 is slightly smaller than the inner diameter C of the outer spacer ring 2, the inner diameter E of the inner spacer ring 3 is the same as the inner diameter d of the bearing 4, and the size of the inner diameter C of the outer spacer ring 2 is between the sizes b and c of the bearing 4, and the size of the outer diameter D of the inner spacer ring 3 is between the size c and the inner diameter d of the bearing 4. The lubricating oil flowing out of the oil hole 8 first enters the gap formed between the outer spacer ring 2 and the inner spacer ring 3. Since the size of the outer diameter D of the inner spacer ring 3 is between the size c and the inner diameter d of the bearing 4, part of the lubricating oil can be stored in the gap, thereby shortening the time for the bearing to reach full lubrication when restarting. When the lubricating oil level at the gap gradually rises, the boss 12 at the inner ring 11 forms an oil separation ladder, so that the lubricating oil flows from the left and right ends into the oil guide groove 16 of the bearing 4 adjacent to the spacer ring. The structure of the boss 12 is symmetrical, so that the amount of lubricating oil flowing into the left and right sides is basically the same, so that the bearings on both sides have basically the same lubrication effect. Since the oil outlet is set at a position far away from the oil inlet hole 5, the lubricating oil must flow through all the bearings 4 before it can be discharged smoothly, which is conducive to achieving full lubrication of the bearings 4.

[0028] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A machine tool transmission seat bearing lubrication structure, comprising a transmission seat (1), an outer spacer ring (2), an inner spacer ring (3) and a bearing (4), characterized in that: An oil inlet hole (5) is provided in the middle of the top of the transmission seat (1), a bearing cover (6) is provided at the left end of the transmission seat (1), and a transmission cavity (7) is formed inside. The outer spacer ring (2), the inner spacer ring (3) and the bearing (4) are all located in the transmission cavity (7), the outer spacer ring (2) is located directly below the oil inlet hole (5), a number of oil holes (8) are evenly distributed on the outer spacer ring (2), a groove (10) with an isosceles trapezoidal cross section is machined on the outer ring (9) of the outer spacer ring (2), and a boss (12) with an isosceles trapezoidal cross section is machined on the inner ring (11) of the outer spacer ring (2); the inner spacer ring (3) is located on the outer spacer ring ( 2), the inner spacer ring (3) is a simple annular structure, the thickness of the inner spacer ring (3) is the same as the thickness of the outer spacer ring (2), the outer diameter D of the inner spacer ring (3) is slightly smaller than the inner diameter C of the outer spacer ring (2), and the inner diameter E of the inner spacer ring (3) is the same as the inner diameter d of the bearing (4); the bearing (4) is located on the left and right sides of the outer spacer ring (2), the bearing (4) includes an outer ring (13), an inner ring (14) and a rolling element (15), an oil guide groove (16) is formed between the outer ring (13) and the inner ring (14), the rolling element (15) is located in the oil guide groove (16), and the outer diameter a of the bearing (4) is the same as the outer diameter A of the outer spacer ring (2); Oil outlets are provided on the bearing cover (6) and on the right side of the transmission seat (1).

2. The bearing lubrication structure for a machine tool transmission seat according to claim 1 is characterized in that: The number of the oil holes (8) is eight.

3. The bearing lubrication structure for a machine tool transmission seat according to claim 1 is characterized in that: The minimum angles of the isosceles trapezoids of the groove (10) and the boss (12) are both 45°.

4. The bearing lubrication structure for a machine tool transmission seat according to claim 1 is characterized in that: The number of bearings (4) on the left and right sides of the outer spacer ring (2) and the inner spacer ring (3) is the same.

5. The bearing lubrication structure for a machine tool transmission seat according to claim 1 is characterized in that: The size of the inner diameter C of the outer spacer ring (2) is between the sizes b and c of the bearing (4), and the size of the outer diameter D of the inner spacer ring (3) is between the size c and the inner diameter d of the bearing (4).

6. The bearing lubrication structure for a machine tool transmission seat according to claim 1, characterized in that: The bearing (4) and the outer spacer ring (2) and the inner spacer ring (3), and the bearings (4) and the bearings (4) are pressed against each other.

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