Knurled bolt for hub

Abstract

The knurled bolt for the hub comprises a bolt body, the bolt body is composed of a knurled section, a screw section and a bolt head, the knurled section, the screw section and the bolt head are integrally formed, external threads are arranged on the outer surface of the screw section, an arrangement space is arranged in the knurled section, and the knurled section and the bolt head are integrally formed. Two extrusion plates penetrating out of the knurling section are arranged in the arrangement space, and a plum-blossom-shaped step groove is formed in the top end face of the bolt head. Compared with the prior art, the extrusion device has the following beneficial effects that the screw rod is in a lifting motion to drive the connected connecting piece to lift and finally drive the two designed extrusion plates to move away from each other, so that the extrusion plates penetrate out of the knurling section, and the outer surface walls of the arc-shaped ends of the extrusion plates are extruded and cling to the inner surface wall of the external connecting part; and the elastic blocks on the outer surface walls of the arc-shaped ends of the extrusion plates generate sufficient friction force to limit axial deflection of the bolt body, so that the use stability of the knurled bolt is improved.

Description

Technical Field

[0001] The utility model relates to a knurled bolt for a wheel hub, belonging to the field of knurled bolts. Background Art

[0002] A knurled bolt is a bolt specially designed for easy hand-tightening operation. The straight knurling on the head increases the friction during the circumferential rotation of the bolt, making hand-tightening more efficient and effectively enhancing the loosening performance of the bolt.

[0003] Most existing knurled bolts are composed of a knurled section and a screw section. Although the connection between the knurled section and the inner surface wall of the external connection part can increase the axial stability of the bolt body to a certain extent, since the overall working environment of the bolt body will be subjected to long-term vibration, the stability of the bolt body cannot be guaranteed by the knurled section alone. The bolt body is prone to loosening or even direct detachment due to vibration, thereby reducing the stability of the knurled bolt. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a knurled bolt for a wheel hub.

[0005] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0006] A knurled bolt for a wheel hub comprises a bolt body, the bolt body consisting of a knurled section, a screw section and a bolt head, and the knurled section, the screw section and the bolt head are integrally formed, the outer surface of the screw section is arranged with an external thread, a setting space is provided inside the knurled section, two extrusion plates passing through the knurled section are provided in the setting space, a plum blossom step groove is provided on the top surface of the bolt head, a threaded through groove connecting to the setting space is provided in the plum blossom step groove, a screw is threadedly inserted in the threaded through groove, the screw and the extrusion plate are connected by a connecting piece, and a plum blossom hole is provided on the top surface of the screw.

[0007] Furthermore, the bottom of the screw rod passes through the setting space, and the extrusion plate includes an arc-shaped extrusion block and a rubber gasket fixed to one end of the extrusion block.

[0008] Furthermore, the connecting piece includes a sleeve rotatably sleeved on the outer surface of the bottom of the screw, a fixing ear is fixed on the sleeve, a secondary fixing ear is fixed on the inner side of the extrusion block, and a connecting rod is connected between the secondary fixing ear and the corresponding fixing ear.

[0009] Furthermore, both ends of the connecting rod are rotatably disposed on the corresponding auxiliary fixing ear and the fixing ear respectively through a rotating shaft.

[0010] Furthermore, the bottom end of the screw is T-shaped, a T-shaped rotating groove is provided inside the sleeve, and the T-shaped end of the screw is rotatably arranged in the T-shaped rotating groove.

[0011] Furthermore, a transverse thin rod is fixedly provided in the setting space, a through block is fixedly provided at the bottom end of the extrusion block, and the transverse thin rod slides through the through block.

[0012] Furthermore, an oil filling space is drilled on the knurled section, the screw section and the bolt head, a rubber ring is provided on the inner side of the head end of the oil filling space, and an oil discharge port connected to the oil filling space is provided on the outer surface of the screw section.

[0013] Beneficial effects of the utility model:

[0014] After the bolt body is screwed together with the external connection part, the drill bit of the drilling rig is inserted into the corresponding plum blossom hole on the top surface of the screw rod, and then the screw rod is rotated, and the screw rod is in a lifting motion, thereby driving the connected connection parts to lift and lower, and finally driving the two extrusion plates designed to move away from each other, so as to complete the extrusion plate passing through the knurled section, and the outer wall of the arc-shaped end of the extrusion plate is squeezed and tightly attached to the inner wall of the external connection part. The elastic block on the outer wall of the arc-shaped end of the extrusion plate generates sufficient friction to limit the axial deflection of the bolt body, thereby improving the stability of the knurled bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a front view of a knurled bolt for a wheel hub according to the present invention;

[0017] Figure 2 This is a schematic diagram of the interior of the installation space of a knurled bolt for a wheel hub according to the present invention;

[0018] Figure 3 This is a schematic diagram of an extrusion plate of a knurled bolt for a wheel hub according to the present invention;

[0019] Figure 4 The utility model is a schematic diagram of the connection between the screw and the sleeve of a knurled bolt for a wheel hub.

[0020] In the figure: 1. Bolt body; 2. Knurled section; 3. Screw section; 4. Bolt head; 5. External thread; 6. Setting space; 7. Extrusion plate; 8. Plum blossom step groove; 9. Threaded groove; 10. Screw; 11. Extrusion block; 12. Rubber gasket; 13. Sleeve; 14. Fixing ear; 15. Auxiliary fixing ear; 16. Connecting rod; 17. T-shaped rotating groove; 18. Horizontal thin rod; 19. Through block; 20. Oil filling space; 21. Rubber ring; 22. Oil drain port. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-4 The utility model provides a technical solution: a knurled bolt for a wheel hub, comprising a bolt body 1, wherein the bolt body 1 is composed of a knurled section 2, a screw section 3 and a bolt head 4, and the knurled section 2, the screw section 3 and the bolt head 4 are integrally formed, the outer surface of the screw section 3 is arranged with an external thread 5, a setting space 6 is provided inside the knurled section 2, two extrusion plates 7 passing through the knurled section 2 are provided in the setting space 6, a plum blossom step groove 8 is provided on the top surface of the bolt head 4, a threaded through groove 9 communicating with the setting space 6 is provided in the plum blossom step groove 8, a screw 10 is inserted into the threaded through groove 9, the screw 10 and the extrusion plate 7 are connected by a connecting piece, and the top surface of the screw 10 is provided with a plum blossom hole.

[0023] See Figure 1 The bottom of the screw 10 passes through the setting space 6, and the extrusion plate 7 includes an arc-shaped extrusion block 11 and a rubber gasket 12 fixed at one end of the extrusion block 11. The rubber gasket 12 contacts the inner surface wall of the external connection part to increase sufficient friction to limit the axial deflection of the bolt body 1.

[0024] See Figure 2-4The connecting member includes a sleeve 13 rotatably sleeved on the outer surface of the bottom of the screw 10, a fixing ear 14 is fixed on the sleeve 13, and a secondary fixing ear 15 is fixed on the inner side of the extrusion block 11. A connecting rod 16 is connected between the secondary fixing ear 15 and the corresponding fixing ear 14, and the two ends of the connecting rod 16 are respectively rotatably set on the corresponding secondary fixing ear 15 and the fixing ear 14 through a rotating shaft. The bottom end of the screw 10 is T-shaped, and a T-shaped rotating groove 17 is opened inside the sleeve 13. The T-shaped end of the screw 10 is rotatably set on the T-shaped rotating groove 17, a transverse thin rod 18 is fixed in the setting space 6, and a through block 19 is fixed at the bottom end of the extrusion block 11. The transverse thin rod 18 slides through the through block 19, and the screw 10 rises and falls when it rotates. The T-shaped end of the screw bottom rotates in the T-shaped rotating groove 17 inside the sleeve 13, and finally drives the sleeve 13 to rise and fall, so as to drive the connecting rod 16 to pull the two extrusion plates 7 to pass through the knurled section 2 or retract into the knurled section 2. The transverse thin rod 18 slides through the through block 19 to ensure that the extrusion blocks 11 can move linearly relative to each other. The transverse thin rod 18 is a square rod.

[0025] See Figure 1 An oil filling space 20 is drilled together on the knurled section 2, the screw section 3 and the bolt head 4. A rubber ring 21 is provided on the inner side of the head end of the oil filling space 20. The outer surface of the screw section 3 is provided with an oil discharge port 22 connected to the oil filling space 20. When filling oil, the lubricating oil is drawn in by a syringe, and then the needle of the syringe is passed through the rubber ring 21, and finally the needle is passed into the oil filling space 20. Finally, the oil is discharged into the oil filling space 20, and the oil is added to the outer surface of the bolt body through the oil discharge port 22 to lubricate the threads of the bolt body, thereby effectively improving the efficiency of lubricating oil filling. The oil filling space 20 is the last channel processed and is processed on the machine tool using a channel drilling machine. The oil filling space 20 of the knurled section 2 is not connected to the setting space 6, that is, when the oil filling space 20 of the knurled section 2 is processed, it is staggered with the setting space 6 for drilling.

[0026] During specific operation, after the bolt body 1 is screwed into the external connection part, the drill bit of the drill is inserted into the corresponding plum blossom hole on the top surface of the screw rod 10, and then the screw rod 10 is rotated, and the screw rod 10 is in a lifting motion, thereby driving the connected connection parts to lift and lower, and finally driving the two extrusion plates 7 designed to move away from each other, thereby completing the extrusion plate 7 passing through the knurled section 2, and the outer wall of the arc-shaped end of the extrusion plate 7 is squeezed and tightly attached to the inner wall of the external connection part. The elastic block of the outer wall of the arc-shaped end of the extrusion plate 7 generates sufficient friction force to limit the axial deflection of the bolt body 1, thereby improving the stability of the knurled bolt.

[0027] Although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A knurled bolt for a wheel hub, characterized in that: The invention comprises a bolt body (1), wherein the bolt body (1) is composed of a knurled section (2), a screw section (3) and a bolt head (4), and the knurled section (2), the screw section (3) and the bolt head (4) are integrally formed, an external thread (5) is arranged on the outer surface of the screw section (3), a setting space (6) is arranged inside the knurled section (2), two extrusion plates (7) penetrating the knurled section (2) are arranged in the setting space (6), a plum blossom step groove (8) is arranged on the top surface of the bolt head (4), a threaded through groove (9) connected to the setting space (6) is arranged in the plum blossom step groove (8), a screw (10) is inserted into the threaded through groove (9), the screw (10) and the extrusion plate (7) are connected by a connecting piece, and a plum blossom hole is arranged on the top surface of the screw (10).

2. A knurled bolt for a wheel hub according to claim 1, characterized in that: The bottom of the screw rod (10) penetrates into the setting space (6), and the extrusion plate (7) comprises an arc-shaped extrusion block (11) and a rubber gasket (12) fixed to one end of the extrusion block (11).

3. A knurled bolt for a wheel hub according to claim 2, characterized in that: The connecting member comprises a sleeve (13) rotatably sleeved on the outer surface of the bottom of the screw rod (10), a fixing ear (14) being fixedly provided on the sleeve (13), a secondary fixing ear (15) being fixedly provided on the inner side of the extrusion block (11), and a connecting rod (16) being connected between the secondary fixing ear (15) and the corresponding fixing ear (14).

4. The knurled bolt for a wheel hub according to claim 3, characterized in that: The two ends of the connecting rod (16) are rotatably arranged on the corresponding auxiliary fixing ear (15) and the fixing ear (14) respectively through a rotating shaft.

5. The knurled bolt for a wheel hub according to claim 4, characterized in that: The bottom end of the screw rod (10) is T-shaped, a T-shaped rotating groove (17) is provided inside the sleeve (13), and the T-shaped end of the screw rod (10) is rotatably arranged in the T-shaped rotating groove (17).

6. The knurled bolt for a wheel hub according to claim 5, characterized in that: A transverse thin rod (18) is fixedly provided in the setting space (6), a penetration block (19) is fixedly provided at the bottom end of the extrusion block (11), and the transverse thin rod (18) slides through the penetration block (19).

7. The knurled bolt for a wheel hub according to claim 6, characterized in that: An oil injection space (20) is drilled on the knurled section (2), the screw section (3) and the bolt head (4), a rubber ring (21) is arranged on the inner side of the head end of the oil injection space (20), and an oil discharge port (22) connected to the oil injection space (20) is arranged on the outer surface of the screw section (3).

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