Fastening bolt with lubricating function

Abstract

The utility model relates to the technical field of fastening bolts, in particular to a fastening bolt with a lubricating function, which comprises a bolt head and a stud, an external thread structure is formed on the stud, a lubricating hole is radially formed on the stud, axial holes communicated with the lubricating hole are coaxially formed on the bolt head and the stud respectively, and a plugging block is slidably mounted in the lubricating hole. An axial rod is slidably mounted in the axial hole, and the axial rod can drive the plugging block to axially move in the lubricating hole in a lifting motion manner; oil injection holes which are axially formed are coaxially formed in the screw head and the stud respectively, and the oil injection holes are communicated with the lubricating hole; the axial rod is inserted into the axial hole, so that the plugging block moves along the lubricating hole, the lubricating hole can be plugged, and then the fastening bolt is mounted to the corresponding position; when the bolt is difficult to disassemble and assemble, the axial rod can be pulled out upwards to a certain position, then the plugging block retreats, at the moment, lubricating oil can be injected through the oil injection hole, the lubricating oil flows into the external thread structure along the oil injection hole, the lubricating effect is achieved, and more labor is saved when the screw is disassembled.

Description

Technical Field

[0001] This utility model relates to the field of fastening bolt technology, and in particular to a fastening bolt with a lubricating function. Background Technology

[0002] Bolts are mechanical parts, cylindrical threaded fasteners that are fitted with nuts. They are a type of fastener mainly composed of a head and a threaded shank, and require a nut to fasten two parts with through holes.

[0003] When bolts are tightened, the meshing contact surfaces rub and slide against each other under high stress. This usually causes some damage to the nut end face, the surface of the clamped object, and the threaded contact surface. Therefore, lubrication of the thread grooves is necessary to protect the bolts and extend their service life.

[0004] However, during the use of traditional bolts, because the bolts are exposed to the air for a long time, the moisture in the air can easily cause the threads at the connection to rust, making the bolts difficult to turn. This makes it more difficult to disassemble and assemble the bolts, and they cannot be reused, which reduces the service life of the bolts and is quite troublesome. Utility Model Content

[0005] The purpose of this invention is to provide a fastening bolt with a lubricating effect to address the shortcomings of existing technologies.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A fastening bolt with lubrication function includes an integrally formed screw head and a stud. The stud has an external thread structure and a lubrication hole formed radially. The screw head and the stud are respectively coaxially formed with axial holes communicating with the lubrication hole. A sealing block is slidably installed in the lubrication hole, and an axial rod is slidably installed in the axial hole. The axial rod can move up and down to drive the sealing block to move axially in the lubrication hole. The screw head and the stud are respectively coaxially formed with axially arranged oil injection holes communicating with the lubrication hole.

[0008] Furthermore: the external thread structure includes a raised outer portion and a recessed inner portion, with the outer and inner portions arranged at intervals.

[0009] Furthermore: the lubrication hole is radially formed in the recess.

[0010] Furthermore, the shape of the outer end face of the sealing block is adapted to the shape of the concave portion.

[0011] Furthermore: the bottom surface of the axial rod is formed with a chamfered structure, the end face of the chamfered structure is a first inclined surface, and the inner end of the sealing block is formed with a second inclined surface that slides in cooperation with the first inclined surface.

[0012] Furthermore, the lubrication hole is equipped with a compression spring fitted onto the sealing block, which can elastically drive the sealing block to retract.

[0013] Furthermore, the top of the screw head is formed with a recessed positioning groove.

[0014] Furthermore: the top of the axial rod is formed with a top limiting block that mates with the positioning groove.

[0015] Furthermore: the top limiting block is formed with a top hole arranged longitudinally through it, into which an oil injection rod is inserted. The oil injection rod is formed with a hollow hole in the axial direction for lubricating oil to pass through, and a pointed tip is formed at the bottom of the oil injection rod to be inserted into the oil injection hole.

[0016] Furthermore: the top of the oil injection rod is formed with a flared funnel.

[0017] The beneficial effects of this utility model are as follows: An axial rod is inserted into the axial hole, causing the sealing block to move along the lubrication hole and block it. Then, the bolt is tightened and installed in the corresponding position. When it is difficult to disassemble or assemble the bolt, the axial rod can be pulled up to a certain position, and then the sealing block retracts. At this time, lubricating oil can be injected through the oil injection hole. The lubricating oil flows into the lubrication hole along the oil injection hole and then flows out to the external thread structure, achieving the lubrication effect. It is more labor-saving when disassembling the screw. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure where the axial rod is separated from the screw head.

[0019] Figure 2 This is a cross-sectional structural diagram of a fastening bolt.

[0020] The reference numerals in the figures include:

[0021] 1-Screw head,

[0022] 11-Stud, 12-External thread structure, 13-Outer protrusion, 14-Inner recess, 15-Lubrication hole

[0023] 16-Positioning groove, 17-Ventilation hole, 18-Top limiting block, 19-Top hole

[0024] 2-Axial hole

[0025] 20-Oil injection hole, 21-Axial rod, 22-Sealing block, 23-First inclined surface, 24-Second inclined surface

[0026] 25-Compression spring, 26-Oil injection rod, 27-Hollow hole, 28-Pointed nozzle, 29-Flanged funnel. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings.

[0028] like Figure 1-2 As shown, a fastening bolt with lubrication function includes an integrally formed screw head 1 and a stud 11. The stud 11 is formed with an external thread structure 12 and a lubrication hole 15 is formed radially on the stud 11. The screw head 1 and the stud 11 are respectively coaxially formed with an axial hole 2 communicating with the lubrication hole 15. A sealing block 22 is slidably installed in the lubrication hole 15, and an axial rod 21 is slidably installed in the axial hole 2. The axial rod 21 can move up and down to drive the sealing block 22 to move axially in the lubrication hole 15. The screw head 1 and the stud 11 are respectively coaxially formed with an axially arranged oil injection hole 20, which communicates with the lubrication hole 15.

[0029] Insert the axial rod 21 into the axial hole 2, so that the sealing block 22 moves along the lubrication hole 15, which can block the lubrication hole 15 and prevent some debris from entering and causing blockage. Then tighten the bolts to the corresponding positions. If the bolts are difficult to remove or install, the axial rod 21 can be pulled up to a certain position, and then the sealing block 22 can be retracted. At this time, lubricating oil can be injected through the oil injection hole 20. The lubricating oil flows into the lubrication hole 15 along the oil injection hole 20, and then flows out to the external thread structure 12, achieving the lubrication effect. It is easier to remove the screws.

[0030] The external thread structure 12 includes a raised outer portion 13 and a recessed inner portion 14, with the outer portion 13 and the inner portion 14 arranged at intervals; a lubrication hole 15 is radially formed in the inner portion 14. Setting the lubrication hole 15 in the inner portion 14 will not affect the external thread structure 12. When the fastening bolt is installed, its external thread structure 12 can normally connect with the hole position to achieve locking.

[0031] Preferably, the shape of the outer end face of the sealing block 22 is adapted to the shape of the inner concave portion 14. That is, when the outer end face of the sealing block 22 and the surface of the inner concave portion 14 are matched, a complete surface structure is formed, and its external thread structure 12 can be further connected to the hole position normally to achieve locking.

[0032] Furthermore, the bottom surface of the axial rod 21 is formed with a chamfered structure, and the end face of the chamfered structure is a first inclined surface 23. The inner end of the sealing block 22 is formed with a second inclined surface 24 that slides with the first inclined surface 23. When the axial rod 21 moves downward, the first inclined surface 23 will slide with the second inclined surface 24 of the sealing block 22, which can drive the sealing block 22 to extend outward along the lubrication axis, so that the sealing block 22 can block the lubrication hole 15, and some debris enters and causes blockage.

[0033] Furthermore, the lubrication hole 15 is equipped with a compression spring 25 sleeved on the sealing block 22. The compression spring 25 can elastically drive the sealing block 22 to retract. When the axial rod 21 moves upward and retracts, under the elastic drive of the compression spring 25, the sealing block 22 will retract along the lubrication block. At this time, the oil injection hole 20 is connected to the lubrication hole 15, and lubricating oil can be injected into the oil injection hole 20 and flow into the lubrication hole 15, continuously flowing outward along the lubrication hole 15 to lubricate the external thread structure 12, making it easier to disassemble the screw.

[0034] The top of the screw head 1 has a recessed positioning groove 16. The top of the axial rod 21 has a top limiting block 18 that mates with the positioning groove 16. When the fastening screw is installed, the axial rod 21 is in the inserted state, and the top limiting block 18 and the positioning groove 16 are in the engaged state, which can ensure the insertion stability of the axial rod 21.

[0035] The top limiting block 18 has a longitudinally through top hole 19 into which an oil injection rod 26 is inserted. The oil injection rod 26 has an axially formed hollow hole 27 for lubricating oil to pass through. The bottom of the oil injection rod 26 has a pointed tip 28 that is inserted into the oil injection hole 20. When lubricating oil needs to be injected, the axial rod 21 needs to be pulled out a bit. At this time, the oil injection rod 26 will slide and engage with the top hole 19 of the top limiting block 18. At this time, the pointed tip 28 at the bottom of the oil injection rod 26 will always remain connected to the oil injection hole 20 to prevent oil leakage.

[0036] Preferably, the top of the oil injection rod 26 is formed with a flared funnel 29 to facilitate the injection of lubricating oil into the oil injection rod 26.

[0037] Preferably, the bottom of the axial hole 2 is formed with a plurality of through vent holes 17, which facilitate the movement of the axial rod 21 in the axial hole 2.

[0038] In summary, this utility model possesses the aforementioned excellent characteristics, enabling it to achieve unprecedented efficiency in use and thus become a highly practical product.

[0039] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fastening bolt with lubricating function, comprising an integrally formed screw head and a stud, the stud having an external thread structure, characterized in that: The stud is radially formed with a lubrication hole, and the screw head and stud are respectively coaxially formed with an axial hole communicating with the lubrication hole. A sealing block is slidably installed in the lubrication hole, and an axial rod is slidably installed in the axial hole. The axial rod can move up and down to drive the sealing block to move axially in the lubrication hole. The screw head and stud are respectively coaxially formed with an axially arranged oil injection hole, which communicates with the lubrication hole.

2. A fastening bolt with lubricating effect according to claim 1, characterized in that: The external thread structure includes a raised outer portion and a recessed inner portion, with the outer and inner portions arranged at intervals.

3. A fastening bolt with lubricating effect according to claim 2, characterized in that: The lubrication hole is radially formed in the inner recess.

4. A fastening bolt with lubricating effect according to claim 3, characterized in that: The shape of the outer end face of the sealing block is adapted to the shape of the inner concave portion.

5. A fastening bolt with lubricating effect according to claim 4, characterized in that: The bottom surface of the axial rod is formed with a chamfered structure, the end face of the chamfered structure is a first inclined surface, and the inner end of the sealing block is formed with a second inclined surface that slides with the first inclined surface.

6. A fastening bolt with lubricating effect according to claim 5, characterized in that: The lubrication hole is equipped with a compression spring sleeved on the sealing block, which can elastically drive the sealing block to retract.

7. A fastening bolt with lubricating effect according to claim 6, characterized in that: The top of the screw head is formed with a recessed positioning groove.

8. A fastening bolt with lubricating effect according to claim 7, characterized in that: The top of the axial rod is formed with a top limiting block that mates with the positioning groove.

9. A fastening bolt with lubricating effect according to claim 8, characterized in that: The top limiting block is formed with a top hole arranged longitudinally through it. An oil injection rod is inserted into the top hole. The oil injection rod is formed with a hollow hole in the axial direction for lubricating oil to pass through. The bottom of the oil injection rod is formed with a pointed tip that is inserted into the oil injection hole.

10. A fastening bolt with lubricating effect according to claim 9, characterized in that: The top of the oil injection rod is formed with a flared funnel.

Images