A lubrication device on a rotating shaft

Abstract

The present invention discloses a lubricating device on a rotating shaft, which comprises a rotating shaft, two fixed rings on the left and right, an inner ring, an outer ring, an external connecting component, two cover plates on the left and right, and a seal; the inner ring is sleeved on the rotating shaft, the outer ring is sleeved outside the inner ring, and a plurality of bearing components are arranged between their radial directions; the two fixed rings on the left and right are respectively fixedly connected to the left and right end faces of the inner ring, and the fixed rings hold the rotating shaft tightly. The two cover plates on the left and right are sleeved on the inner ring and are respectively fixedly connected to the left and right end faces of the outer ring; the outer ring is connected to the external connecting component, and a seal is arranged between the outer ring and the inner ring. The inner and outer rings of the lubricating device of the present invention have a long service life, greatly reduce the production cost, and at the same time ensure the supply of lubricating oil, ensuring the normal operation of the equipment. At the same time, in the case of vibration of the rotating shaft, it can reduce the vibration of the outer ring, reduce the impact between the outer ring and the inner ring, thereby improving the working stability of the lubricating device.

Description

Technical Field

[0001] The present invention relates to a lubrication device for transmission parts and belongs to the mechanical field. Background Art

[0002] In the field of mechanical transmission, when the transmission shaft transmitting power works, continuous lubrication is required at the joints at both ends, such as at the cross shaft, joints, etc., to ensure the stable operation of the equipment.

[0003] In the existing lubrication device for the transmission shaft, the inner ring and the outer ring are supported by a support ring. At first, the effect is good, but as the working time of the transmission shaft becomes longer, its disadvantages become increasingly obvious: First, the support ring is severely worn, resulting in damage to the seal inside it, making the sealing effect worse; Second, due to gravity, the bottom of the support ring is worn more severely than other positions, and the gap between the inner and outer rings is uneven, causing eccentric wear between the inner and outer rings. When the eccentricity reaches the specified value, although the wear in other places is still very small, it still needs to be replaced. Therefore, the service life of the support ring, the inner ring, and the outer ring is short, greatly increasing the production cost. Frequent replacement of related parts cannot ensure the supply of lubricating oil and seriously affects normal work; Third, since the support ring and the inner and outer rings are in rigid contact, when the rotating shaft vibrates during operation, it will cause the vibration of the outer ring, increasing the impact force between the outer ring and the inner ring, thereby affecting the stability of the lubrication device. In short, the current lubrication device has a short service life and seriously affects the operation of the rotating shaft, making the equipment unable to operate stably. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide a lubrication device on a rotating shaft, which has a long service life for the inner and outer rings, greatly reduces the production cost, and at the same time ensures the supply of lubricating oil and guarantees the normal operation of the equipment. At the same time, when the rotating shaft vibrates, it can reduce the vibration of the outer ring and reduce the impact between the outer ring and the inner ring, thereby improving the stability of the lubrication device. In addition, since the gap between the outer rings remains fixed, the sealing parts have a long service life and a good sealing effect.

[0005] The lubrication device on the rotating shaft of the present invention includes a rotating shaft, two fixed rings on the left and right, an inner ring, an outer ring, an external connection component, two covers on the left and right, and a sealing part; the inner ring is sleeved on the rotating shaft, the outer ring is sleeved outside the inner ring, and a plurality of bearing components are arranged between their radial directions; the two fixed rings on the left and right are respectively fixedly connected to the left and right end faces of the inner ring, and the fixed rings hold the rotating shaft tightly. The two covers on the left and right are sleeved on the inner ring and are respectively fixedly connected to the left and right end faces of the outer ring; the outer ring is connected to the external connection component, and a sealing part is arranged between the outer ring and the inner ring.

[0006] Furthermore, the fixed ring, inner ring, and outer ring are all split parts, each consisting of two semi-rings, the upper and lower semi-rings. The upper and lower semi-rings are connected into an integral part by bolts.

[0007] Furthermore, there is a clearance fit between the inner hole of the inner ring and the outer cylindrical surface of the transmission shaft, and the minimum clearance is greater than zero.

[0008] Furthermore, there are at least two upper bearing assemblies arranged between the upper semi-ring of the outer ring and the upper semi-ring of the inner ring, and they are symmetrically arranged. Each upper bearing assembly includes two bearing assemblies Ⅰ arranged symmetrically left and right. Each bearing assembly Ⅰ includes a bearing seat Ⅰ, a bearing, and a bushing. The bushing is sleeved on the non-threaded cylindrical section of the bearing seat Ⅰ, and the bearing is sleeved outside the bushing and pressed tightly against the step surface of the bushing. Circular holes are machined on the left and right end faces of the outer ring, and one bearing assembly Ⅰ is arranged in each circular hole. The threaded section of the bearing seat Ⅰ is screwed with the threaded hole in the circular hole, pressing the large end face of the bushing tightly against the bottom surface of the circular hole and pressing the bearing tightly. The outer circle of the bearing contacts the outer ring surface of the inner ring.

[0009] Furthermore, the axis of symmetry of the upper bearing assembly is a vertical line passing through the center of the inner ring.

[0010] Furthermore, there is a clearance between the left and right two cover plates and the bearing seat Ⅰ, and there is a clearance between the outer circle of the bearing and the inner circle surface of the circular hole of the outer ring.

[0011] Furthermore, a lower bearing assembly is arranged at the lowest position between the lower semi-ring of the outer ring and the lower semi-ring of the inner ring. The lower bearing assembly includes two bearing assemblies Ⅱ arranged symmetrically left and right. Each bearing assembly Ⅱ includes a bearing, a bushing, a bearing seat Ⅱ, and two cylindrical helical compression springs. Two symmetric blind holes are machined on the bottom surface of the bearing seat Ⅱ, and one cylindrical helical compression spring is arranged in each blind hole. The bushing is sleeved on the cylindrical section of the bearing seat Ⅱ and pressed against the bottom surface of the groove of the bearing seat Ⅱ. The bearing is sleeved outside the bushing and pressed tightly against the step surface of the bushing. The outer ring is provided with two square holes that penetrate the inner and outer ring surfaces, and one bearing assembly Ⅱ is arranged in each square hole. The bearing seat Ⅱ is in close contact with the four surfaces of the square hole, with its bottom surface facing down. A cover is arranged outside each square hole, and there is a certain clearance between the cover plate and the bottom surface of the bearing seat Ⅱ. The bottom surface of the cylindrical helical compression spring contacts the cover plate and is compressed, and the outer circle of the bearing contacts the outer circle of the inner ring.

[0012] Furthermore, there is a certain clearance between the outer ring of the bearing and the arc surface of the groove of the bearing seat Ⅱ, and its outer end face is slightly lower than the top surface of the cylindrical section of the bearing seat Ⅱ.

[0013] Furthermore, a plane is machined on the outer ring surface of the lower semi-ring of the outer ring at the outside position of the square hole, and the cover plate is installed on the plane, keeping the cylindrical helical compression spring in a compressed state with a certain compression amount, and the bearing assembly Ⅱ can float up and down in the square groove.

[0014] The advantages of the lubrication device of the present invention are as follows: First, the inner ring and the outer ring are supported and rotated through the bearings in the bearing assembly. Due to the supporting effect of the bearings in the bearing assembly on the inner ring, the gap between the inner and outer rings remains a fixed value. Coupled with the rolling contact between the bearings and the inner ring, there is basically no wear between the inner and outer rings, and the service life of the inner and outer rings is long, which greatly reduces the production cost. At the same time, the supply of lubricating oil is ensured, and the normal operation of the equipment is guaranteed. Second, since the gap between the outer rings remains a fixed value, the sealing parts have a long service life and good sealing effect. Third, when the rotating shaft vibrates during operation, the compression and recovery of the cylindrical helical compression spring can always maintain the contact between the bearing and the outer ring surface of the inner ring, thereby reducing the vibration of the outer ring and the impact between the outer and inner rings, and improving the working stability of the lubrication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the lubrication device of the present invention.

[0016] Figure 2 is along Figure 1 the sectional view taken along line A-A in

[0017] Figure 3 is along Figure 2 the sectional view taken along line B-B in

[0018] Figure 4 is Figure 3 the enlarged schematic view at H in

[0019] Figure 5 is Figure 3 the enlarged schematic view at K in

[0020] Figure 6 is Figure 2 the enlarged schematic view at J in DETAILED DESCRIPTION OF THE INVENTION

[0021] Embodiment 1

[0022] As Figure 1 , Figure 2 , Figure 3 shown, a lubrication device on a rotating shaft according to the present invention includes a rotating shaft 1, two left and right fixing rings 2, an inner ring 3, an outer ring 4, an external connection member 5, two left and right cover plates 20, and a sealing member 19. The inner ring 3 is sleeved on the rotating shaft 1, the outer ring 4 is sleeved outside the inner ring 3, and a plurality of bearing assemblies are arranged between their radial directions. The two left and right fixing rings 2 are respectively fixedly connected to the left and right end faces of the inner ring 3, and the fixing ring 2 clamps the rotating shaft 1. The two left and right cover plates 20 are sleeved on the inner ring 3 and are respectively fixedly connected to the left and right end faces of the outer ring 4. The outer ring 4 is connected to the external connection member 5, and a sealing member 19 is arranged between the outer ring 4 and the inner ring 3.

[0023] In the lubrication device of the present invention, the inner ring 3 is fixed to the rotating shaft 1 through the fixing ring 2 and rotates with the rotating shaft 1 during operation; the outer ring 4 is connected to the external connecting member 5 and is independent of the rotating shaft 1, remaining fixed during operation; the inner ring 3 and the outer ring 4 are supported and rotated by the bearings in the bearing assembly. The advantages of this structure are as follows: Due to the support of the bearings in the bearing assembly for the inner ring, the gap between the inner and outer rings remains fixed. Coupled with the rolling contact between the bearings and the inner ring, even if the transmission shaft operates for a long time, the inner ring basically has no wear. In addition, the outer ring of this structure also has no wear. Therefore, the inner and outer rings have a long service life and basically do not need to be replaced, greatly reducing the production cost. At the same time, the supply of lubricating oil is ensured, guaranteeing the normal operation of the equipment. Also, since the gap between the outer rings remains fixed, the sealing parts have a long service life and good sealing effect.

[0024] Among them, the fixing ring 2, the inner ring 3, and the outer ring 4 are all split parts, each being two half-rings, and the upper and lower half-rings are connected into an integral part by bolts.

[0025] Making the fixing ring 2, the inner ring 3, and the outer ring 4 into split parts not only facilitates the assembly between the upper and lower parts but also facilitates the installation of the bearing assembly.

[0026] Among them, there is a clearance fit between the inner hole of the inner ring 3 and the outer circular surface of the transmission shaft 1, and the minimum clearance is greater than zero.

[0027] There is a gap between the inner ring 3 and the transmission shaft 1, which not only prevents wear between the two but also allows the lubricating oil to lubricate the transmission shaft through this gap.

[0028] Embodiment 2

[0029] As Figure 2 、 Figure 3 、 Figure 4 shown, in the lubrication device of the present invention: There are at least two upper bearing assemblies provided between the upper half-ring of the outer ring 4 and the upper half-ring of the inner ring 3, and the upper bearing assemblies are symmetrically arranged; each upper bearing assembly includes two bearing assemblies Ⅰ6 arranged symmetrically left and right. Each bearing assembly Ⅰ6 includes a bearing seat Ⅰ7, a bearing 8, and a bushing 9. The bushing 9 is sleeved on the non-threaded cylindrical section of the bearing seat Ⅰ7, and the bearing 8 is sleeved outside the bushing 9 and tightly pressed on the step surface of the bushing 9; Circular holes are machined on the left and right end faces of the outer ring 4, and one bearing assembly Ⅰ6 is arranged in each circular hole. The threaded section of the bearing seat Ⅰ7 is screwed into the threaded hole in the circular hole, tightly pressing the large end face of the bushing 9 against the bottom surface of the circular hole and pressing the bearing 8 tightly. The outer circle of the bearing 8 contacts the outer ring surface of the inner ring 3. The symmetry axis of the upper bearing assembly is a vertical line passing through the center of the inner ring.

[0030] Among them, there are gaps between the left and right cover plates 20 and the bearing seat Ⅰ7, and there is a gap between the outer circle of the bearing 8 and the inner circular surface of the circular hole of the outer ring 4.

[0031] When the inner ring 3 rotates with the rotating shaft 1, its outer ring surface rolls and contacts with the bearing 8 in the bearing assembly Ⅰ6. The bearing 8 plays a supporting role for the inner ring 3, ensuring that the inner ring 3 rotates around the axis line of the rotating shaft 1 and will not shake and cause eccentric wear. The upper bearing assemblies are symmetrically arranged, ensuring the uniformity of the force on the inner ring and the horizontal component forces can cancel each other out, keeping the inner ring in the central position without deviation. Therefore, the inner ring will not have eccentric wear and has a long service life. At the same time, the non-deviation of the inner ring position will not cause wear to the outer ring, so the service life of the outer ring is also extended.

[0032] The specific number of the upper bearing assemblies is determined according to the weight and size of the upper half ring through the bearing load coefficient.

[0033] Embodiment 3

[0034] As Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 shown, the lubrication device of the present invention: a lower bearing assembly is provided at the lowest position between the lower half ring of the outer ring 4 and the lower half ring of the inner ring 3; the lower bearing assembly includes two symmetrically arranged bearing assemblies Ⅱ10 on the left and right. Each bearing assembly Ⅱ10 includes a bearing 8, a bushing 9, a bearing seat Ⅱ11, and two cylindrical helical compression springs 12. Two symmetric blind holes are machined on the bottom surface of the bearing seat Ⅱ11, and one cylindrical helical compression spring 12 is arranged in each blind hole. The bushing 9 is sleeved on the cylindrical section of the bearing seat Ⅱ11 and pressed on the bottom surface of the groove of the bearing seat Ⅱ11. The bearing 8 is sleeved outside the bushing 9 and tightly pressed on the step surface of the bushing 9; the outer ring 4 is provided with two square holes that penetrate the inner and outer ring surfaces. One bearing assembly Ⅱ10 is arranged in each square hole. The bearing seat Ⅱ11 is in close fit with the four surfaces of the square hole, and its bottom surface faces downward. A cover plate 13 is respectively arranged outside each square hole. There is a certain gap between the cover plate 13 and the bottom surface of the bearing seat Ⅱ11. The bottom surface of the cylindrical helical compression spring 12 contacts the cover plate 13 and is compressed. The outer circle of the bearing 8 contacts the outer circle of the inner ring 3.

[0035] Among them, there is a certain gap between the outer ring of the bearing 8 and the arc surface of the groove of the bearing seat Ⅱ11, and its outer end surface is slightly lower than the top surface of the cylindrical section of the bearing seat Ⅱ11.

[0036] The outer ring surface of the lower half ring of the outer ring 4 is machined with a plane at the position outside the square hole. The cover plate 13 is installed on the plane, and the cylindrical helical compression spring 12 is in a compressed state with a certain compression amount left. The bearing assembly Ⅱ10 can float up and down in the square groove.

[0037] When the inner ring 3 rotates with the rotating shaft 1, its outer ring surface rolls into contact with the bearing 8 in the bearing assembly II 11. When the rotating shaft 1 vibrates during operation, the compression and recovery of the cylindrical helical compression spring 12 can always maintain the contact between the bearing 8 and the outer ring surface of the inner ring 3, thereby reducing the vibration of the outer ring 4 and the impact between the outer ring 4 and the inner ring 3, thus improving the working stability of the lubrication device.

[0038] The lubrication principle of the lubrication device of the present invention is as follows: Lubricating oil enters the interior of the lubrication device through the oil inlet 14 of the outer ring 4. Seals are arranged in the inner holes on both sides of the outer ring 4 to achieve the sealing of the lubricating oil. Under the action of the pressure difference, the lubricating oil reaches the annular oil groove 15 on the outer ring surface of the inner ring 3 and enters the lubrication pipeline laid on the surface of the rotating shaft 1 through a number of radially distributed oil passages 16, and is transported to each lubrication point to achieve one-point or multi-point lubrication.

Claims

1. A lubrication device on a rotating shaft, characterized in that: The lubrication device includes a rotating shaft (1), two fixed rings (2) on the left and right, an inner ring (3), an outer ring (4), an external connection component (5), two cover plates (20) on the left and right, and a seal (19); the inner ring (3) is sleeved on the rotating shaft (1), the outer ring (4) is sleeved outside the inner ring (3), and a number of bearing components are arranged between their radial directions; the two fixed rings (2) on the left and right are respectively fixedly connected to the left and right end faces of the inner ring (3), and the fixed ring (2) holds the rotating shaft (1) tightly. The two cover plates (20) on the left and right are sleeved on the inner ring (3) and are respectively fixedly connected to the left and right end faces of the outer ring (4); the outer ring (4) is connected to the external connection component (5), and a seal (19) is arranged between the outer ring (4) and the inner ring (3); the fixed ring (2), the inner ring (3), and the outer ring (4) are all split parts, which are two half rings up and down, and the upper half ring and the lower half ring are connected into an integral part by bolts; a lower bearing component is arranged at the lowest position between the lower half ring of the outer ring (4) and the lower half ring of the inner ring (3); the lower bearing component includes two bearing components II (10) symmetrically arranged on the left and right. Each bearing component II (10) includes a bearing (8), a bushing (9), a bearing seat II (11), and two cylindrical helical compression springs (12). Two symmetrical blind holes are machined on the bottom surface of the bearing seat II (11), and one cylindrical helical compression spring (12) is arranged in each blind hole. The bushing (9) is sleeved on the cylindrical section of the bearing seat II (11) and presses on the bottom surface of the groove of the bearing seat II (11). The bearing (8) is sleeved outside the bushing (9) and tightly presses on the step surface of the bushing (9); two square holes are arranged on the outer ring (4), the square holes penetrate the inner and outer ring surfaces, and one bearing component II (10) is arranged in each square hole. The bearing seat II (11) is in close fit with the four surfaces of the square hole, and its bottom surface faces downward. A cover plate (13) is arranged outside each square hole. There is a certain gap between the bottom surface of the cover plate (13) and the bottom surface of the bearing seat II (11). The bottom surface of the cylindrical helical compression spring (12) contacts the cover plate (13) and is compressed. The outer circle of the bearing (8) contacts the outer circle of the inner ring (3); there is a certain gap between the outer ring of the bearing (8) and the arc surface of the groove of the bearing seat II (11), and its outer end face is slightly lower than the top surface of the cylindrical section of the bearing seat II (11).

2. The lubrication device according to claim 1, characterized in that: The inner hole of the inner ring (3) and the outer circular surface of the rotating shaft (1) are in clearance fit, and the minimum clearance is greater than zero.

3. The lubrication device according to claim 1, characterized in that: There are at least two upper bearing assemblies provided between the upper half-ring of the outer ring (4) and the upper half-ring of the inner ring (3), and the upper bearing assemblies are symmetrically arranged; each upper bearing assembly includes two bearing assemblies I (6) symmetrically arranged on the left and right, and each bearing assembly I (6) includes a bearing seat I (7), a bearing (8), and a bushing (9). The bushing (9) is sleeved on the non-threaded cylindrical section of the bearing seat I (7), and the bearing (8) is sleeved outside the bushing (9) and pressed tightly on the step surface of the bushing (9); circular holes are machined on the left and right end faces of the outer ring (4), and one bearing assembly I (6) is arranged in each circular hole. The threaded section of the bearing seat I (7) is screwed with the screw hole in the circular hole, pressing the large end face of the bushing (9) tightly against the bottom surface of the circular hole and pressing the bearing (8) tightly. The outer circle of the bearing (8) contacts the outer ring surface of the inner ring (3).

4. The lubrication device according to claim 3, characterized in that: The axis of symmetry of the upper bearing assembly is a vertical line passing through the center of the inner ring (3).

5. The lubrication device according to claim 3, characterized in that: There is a gap between the left and right two cover plates (20) and the bearing seat I (7), and there is a gap between the outer circle of the bearing (8) and the inner circle surface of the circular hole of the outer ring (4).

6. The lubrication device according to claim 1, characterized in that: A plane is machined on the outer ring surface of the lower half-ring of the outer ring (4) at the position outside the square hole, and the cover plate (13) is installed on the plane, and the cylindrical helical compression spring (12) is in a compressed state with a certain amount of compression left, and the bearing assembly II (10) can float up and down in the square groove.

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