Oiling inspection device for bearing

Abstract

The utility model belongs to the technical field of aeronautical manufacturing technology process equipment, and relates to a bearing oil injection inspection device which comprises a connecting rod, a limiting nut, a limiting sleeve and a fastening nut. The connecting rod sequentially penetrates through the limiting nut, the limiting sleeve and a bearing inner hole to ensure that the limiting nut, the limiting sleeve and the bearing inner hole are coaxial and are finally tightened by a set screw; the limiting nut and the limiting sleeve are respectively connected with the external threads of the connecting rod; the base can move up and down along the connecting rod; a stepped hole with a side hole is formed in the center of the connecting rod and used for being connected with an oil injection gun to guarantee an oil injection passage. The oil injection device overcomes the defects of inaccurate positioning, poor operation stability, repeated oil injection and the like, meets the requirement of accurate oil injection, improves the performance of process equipment and the product quality, reduces the operation difficulty, saves manpower, material resources and financial resources, and shortens the production cycle.

Description

Technical Field

[0001] The utility model belongs to the technical field of process equipment, and particularly relates to an oil injection inspection device for bearings. Background Art

[0002] At present, during the maintenance of an aircraft, in order to ensure that the bearings can be continuously lubricated and rotated after being installed in aircraft parts, lubricating grease must be added to the gap between the inner and outer rings of the bearings. The maintenance and repair of bearings often use an oil gun for oil injection lubrication. The oil injection port of the oil gun is generally a taper thread structure, which contacts the bearing gap in a tapered hole. The reaction force is large, and it requires two people to press and cooperate to complete. When injecting lubricating grease, it is extremely easy to have phenomena such as running, overflowing, and leaking. The material loss is large, the work efficiency is low, and it needs to be injected repeatedly to barely complete the oil injection work, and the oil injection result cannot be inspected. Summary of the Invention

[0003] 1. Technical Problems to be Solved

[0004] The utility model overcomes the disadvantages of the influence of human factors and poor operability in the prior art, and provides an oil injection inspection device for bearings, which meets the requirements of the traceability management of bearing maintenance during the aircraft maintenance process, that is, it improves the operation convenience and solves the problems that the oil injection result cannot be inspected and the maintenance quality cannot be guaranteed.

[0005] 2. Technical Solutions

[0006] In order to solve the problems of uncontrollable oil injection results, poor operability and inability to inspect the maintenance quality of existing bearings, the utility model provides an oil injection inspection device for bearings, and the technical solutions are as follows.

[0007] An oil injection inspection device for bearings includes a connecting rod, a limit nut, a limit sleeve, and a set screw; the connecting rod sequentially passes through the limit nut, the limit sleeve, and the bearing inner hole to ensure the coaxiality of the three, and finally is tightened with a set screw; the limit nut and the limit sleeve are respectively connected to the external thread of the connecting rod and can move up and down along the connecting rod.

[0008] The connecting rod has a stepped hole with a side hole in the center for connecting an oil gun to ensure the oil injection passage.

[0009] In the aforementioned oil injection inspection device for bearings, the connecting rod is divided into an external structure and an internal structure. The external structure is a stepped shaft structure for connecting the bearing to ensure the stability of its operation; the internal structure is a stepped hole with a side hole for connecting an oil gun to ensure the oil injection passage.

[0010] Further, the external structure of the connecting rod includes a top boss, a first screw, a limiting boss, a mating structure, and a second screw. The boss is connected to the first screw, the limiting boss is connected to the mating structure, and the mating structure is connected to the second screw through undercut grooves respectively; a limiting nut and a limiting sleeve pass through the connecting rod in sequence and are threadedly connected to the first screw; the limiting boss passes through the limiting sleeve; the mating structure and the inner hole of the passing bearing meet the clearance fit tolerance requirements; the second screw is threadedly connected to a set screw nut.

[0011] Further, the internal structure of the connecting rod includes a connection area, an oil injection hole, and an oil outlet hole; the connection area and the oil injection hole are inner hole structures, the center of the hole coincides with the center of the connecting rod, and the connection area is connected to the oil injection hole through an undercut groove; the connection area is located inside the top boss in the external structure of the connecting rod and has a tapered thread structure to ensure the sealing effect; the oil injection hole is a deep hole, starting from the top boss of the external structure, passing through the first screw, and ending at the limiting boss; the oil outlet hole is a cylindrical hole, the center line of which is perpendicular to the oil injection hole, located at the limiting boss of the external structure, and is communicated with the oil injection hole.

[0012] In the aforementioned oil injection inspection device for a bearing, the limiting nut is a standard part, connected to the first screw, and used to tighten the limiting sleeve.

[0013] In the aforementioned oil injection inspection device for a bearing, the limiting sleeve has a cylindrical structure on the outside and a stepped hole structure on the inside. There is a threaded hole at the center end and a cylindrical hole at the tail. The threaded hole and the cylindrical hole are coaxial; the end face of the tail is not chamfered to ensure its sealing performance; and it is ensured that the flatness of the end face of the tail is not greater than 0.01; the threaded hole is connected to the first screw, passes through the limiting boss to form an oil storage area, and the end face of the tail is closely attached to the product connecting the bearing (a thin rubber ring is allowed to be added on this plane) to ensure its sealing performance.

[0014] In the aforementioned oil injection inspection device for a bearing, the set screw nut is a standard part, connected to the second screw, and used to ensure the tight fit of the connecting rod, the limiting sleeve, and the bearing.

[0015] 3. Beneficial technical effects

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] ① Compared with the traditional oil injection work, the device has a high matching degree with the product, accurate positioning, convenient operation, and no other objective influencing factors, greatly reducing the impact of human factors on the unstable maintenance quality and improving the maintenance quality;

[0018] ② The device is connected by full threads to ensure its airtightness, enabling sufficient lubrication of the bearing steel balls without causing large-area waste;

[0019] ③It has changed the status quo where the effect of oil injection cannot be checked. This device can visibly display the oil injection effect. By observing whether there is grease oozing from the gap on the back of the bearing, it can verify whether the oil injection is successful.

[0020] In summary, the present invention provides an oil injection detection device that is accurately installed, simple and stable in operation, has good sealing performance, and directly acts on the bearing. It fundamentally solves the problems of inaccurate positioning, poor operation stability, and repeated oil injection, realizes the precise oil injection requirement, improves the performance of process equipment and product quality, reduces the operation difficulty, saves manpower, material resources and financial resources, and shortens the production cycle. Brief Description of the Drawings

[0021] The present utility model includes 5 drawings, and the drawings and their descriptions are as follows:

[0022] Figure 1 It is a schematic structural diagram of an oil injection inspection device for a bearing;

[0023] Figure 2 It is a sectional view of an oil injection inspection device for a bearing;

[0024] Figure 3 It is a schematic structural diagram of the connecting rod 1;

[0025] Figure 4 It is a sectional view of the connecting rod 1;

[0026] Figure 5 It is a schematic structural diagram of the limit sleeve 3.

[0027] Among them: 1 - connecting rod, 2 - limit nut, 3 - limit sleeve, 4 - set screw, 5 - top boss, 6 - first screw, 7 - limit boss, 8 - mating structure, 9 - second screw, 10 - connection area, 11 - oil injection hole, 12 - oil outlet hole. Detailed Description of the Specific Embodiment

[0028] The following further describes the present utility model in detail in conjunction with the drawings and specific embodiments:

[0029] To solve the above technical problems, the present utility model is realized through the following technical solutions: An oil injection inspection device for a bearing provided by the present utility model, as Figure 1 shown, includes a connecting rod 1, a limit nut 2, a limit sleeve 3, and a set screw 4; the connecting rod 1 sequentially passes through the limit nut 2, the limit sleeve 3, and the inner hole of the bearing to ensure the coaxiality of the three, and finally tightens with the set screw 4; the limit nut 2 and the limit sleeve 3 are respectively connected to the external thread of the connecting rod 1; and can move up and down along the connecting rod.

[0030] In the aforementioned oil injection inspection device for bearings, the connecting rod 1 is divided into an external structure and an internal structure. The external structure is a stepped shaft structure for connecting the bearing to ensure the stability of its operation; the internal structure is a stepped hole with side holes for connecting the oil injection gun to ensure the oil injection passage.

[0031] The external structure of the connecting rod 1 includes a top boss 5, a first screw 6, a limit boss 7, a mating structure 8, and a second screw 9. The boss 5 and the first screw 6, the limit boss 7 and the mating structure 8, and the mating structure 8 and the second screw 9 are respectively connected by a tool withdrawal groove; the limit nut 2 and the limit sleeve 3 pass through the connecting rod 1 in sequence and are threadedly connected to the first screw 6; the limit boss 7 passes through the limit sleeve 3; the mating structure 8 and the inner hole of the passing-through bearing meet the clearance fit tolerance requirements; the second screw 9 is threadedly connected to the set screw nut 4.

[0032] The internal structure of the connecting rod 1 includes a connection area 10, an oil injection hole 11, and an oil outlet hole 12. The connection area 10 and the oil injection hole 11 are internal hole structures, and the center of the hole coincides with the center of the connecting rod. The connection area 10 and the oil injection hole 11 are connected by a tool withdrawal groove; the connection area 10 is located inside the top boss 5 in the external structure of the connecting rod and has a tapered thread structure to ensure the sealing effect; the oil injection hole 11 is a deep hole starting from the top boss 5 of the external structure, passing through the first screw 6, and ending at the limit boss 7; the oil outlet hole 12 is a cylindrical hole, the center line of which is perpendicular to the oil injection hole 11, located at the limit boss 7 of the external structure, and is connected to the oil injection hole 11.

[0033] In the aforementioned oil injection inspection device for bearings, the limit nut 2 is a standard part and is connected to the first screw 6 for tightening the limit sleeve 3.

[0034] In the aforementioned oil injection inspection device for bearings, the limit sleeve 3 has a cylindrical structure on the outside and a stepped hole structure on the inside. There is a threaded hole at the central end and a cylindrical hole at the tail. The threaded hole and the cylindrical hole are coaxial; the end face of the tail is not chamfered to ensure its sealing performance; and the flatness of the end face of the tail is ensured to be no greater than 0.01; the threaded hole is connected to the first screw 6, passes through the limit boss 7 to form an oil storage area, and the end face of the tail is closely attached to the product surface of the bearing parts (allowing a thin rubber ring to be added on this plane) to ensure its sealing performance.

[0035] In the aforementioned oil injection inspection device for bearings, the set screw nut 4 is a standard part and is connected to the second screw 9 for ensuring the tight fit of the connecting rod 1, the limit sleeve 3, and the bearing.

[0036] See Figure 1 and Figure 2 , the usage process of an oil injection inspection device for bearings includes:

[0037] ①Manufacture and process all the parts in the present utility model.

[0038] ②When connecting the grease gun, a taper thread connection matching the connection area 11 shall be selected.

[0039] ③Before use, after cleaning the excess substances on the bearing surface, pass the limit nut 2, the limit sleeve 3, and the bearing components through the connecting rod 1 in sequence, and make the inner ring of the bearing of the bearing component closely adhere to the end face of the limit boss 7 to ensure that the lubricating oil can smoothly enter the gap between the bearing steel balls; at the same time, make the tail end face of the limit sleeve 3 closely fit with the product surface of the bearing component to ensure the sealing performance of the full thread of the connecting rod 1; then tighten it with the set screw 4; finally, connect the grease gun and press the grease gun to press the grease into the bearing.

[0040] ④During the operation, to ensure that the grease does not leak during injection, the injection pressure can be adjusted and injected slowly. When grease emerges from the gap on the back of the bearing, it indicates that the grease injection is successful and the greasing is completed.

[0041] ⑤After the operation is completed, disassemble the utility model. Through the utility model, the quality of bearing greasing is guaranteed, and the operation difficulty and operation risk are reduced.

Claims

1. A bearing oil filling inspection device, characterized in that: The inspection device includes a connecting rod, a limit nut, a limit sleeve, and a locking nut; the connecting rod passes through the limit nut, the limit sleeve, and the inner hole of the bearing in sequence to ensure that the three are coaxial, and finally tightened with a locking screw; the limit nut and the limit sleeve are respectively connected to the external thread of the connecting rod; and can move up and down along the connecting rod; the step hole with a side hole in the center of the connecting rod is used to connect a grease gun to ensure the oil injection passage.

2. The oil filling inspection device for a bearing according to claim 1, characterized in that: The external structure of the connecting rod includes a top boss, a first screw, a limiting boss, a matching structure, and a second screw. The boss and the first screw, the limiting boss and the matching structure, and the matching structure and the second screw are respectively connected through a backhoe groove; the limiting nut and the limiting sleeve pass through the connecting rod in sequence and are connected to the first screw through a thread; the limiting boss passes through the limiting sleeve; the matching structure and the inner hole of the bearing passed through meet the clearance fit tolerance requirements; the second screw and the fixing nut are connected through a thread.

3. The oil filling inspection device for a bearing according to claim 1, characterized in that: The internal structure of the connecting rod includes a connecting area, an oil filling hole, and an oil outlet hole; the connecting area and the oil filling hole are inner hole structures, the center of the hole coincides with the center of the connecting rod, and the connecting area and the oil filling hole are connected by a back-cut groove; the connecting area is located inside the top boss in the external structure of the connecting rod, and has a tapered thread structure to ensure the sealing effect; the oil filling hole is a deep hole, starting from the top boss of the external structure, passing through the first screw, and ending at the limiting boss; the oil outlet hole is a cylindrical hole, the center line of which is perpendicular to the oil filling hole, located on the limiting boss of the external structure, and connected with the oil filling hole.

4. The oil filling inspection device for a bearing according to claim 1, characterized in that: The limiting nut is a standard part, connected to the first screw rod, and used to tighten the limiting sleeve.

5. The oil filling inspection device for a bearing according to claim 1, characterized in that: The limit sleeve is a cylindrical structure with a stepped hole structure inside. A threaded hole is provided at the center end and a cylindrical hole is provided at the tail. The threaded hole is coaxial with the cylindrical hole. The threaded hole is connected to the first screw and passes through the limit boss to form an oil storage area. The tail end face fits tightly with the product connected to the bearing to ensure its sealing.

6. The oil filling inspection device for a bearing according to claim 5, characterized in that: A thin rubber ring is arranged between the tail end face and the connecting bearing.

Images