Corrosion-resistant tire bolt

Abstract

The utility model belongs to the technical field of bolts, and particularly relates to a corrosion-resistant tire bolt which comprises a bolt body, a bolt head is arranged at one end of the bolt body, a bolt rod is arranged at the other end of the bolt body, and external threads are arranged at the end, away from the bolt head, of the bolt rod. The bolt body is coaxially provided with the through inner pre-tightening hole; the outer protection layer is formed outside the bolt body; and the inner pre-tightening assembly is arranged in the inner pre-tightening hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolts, and in particular relates to a corrosion-resistant tire bolt. Background Art

[0002] As an important part of fastening the car wheel hub, tire bolts need to have high physical properties. The car wheel hub and the steel rim are generally connected directly through the cooperation of bolts and nuts; traditional tire bolts have poor corrosion resistance and are easy to loosen, thus affecting the safety of tires and even car operation. Utility Model Content

[0003] The utility model aims to solve the above-mentioned technical problems and provide a tire bolt which is simple in structure, corrosion-resistant and can prevent retreat and loosening.

[0004] In view of this, the utility model provides a corrosion-resistant tire bolt, comprising:

[0005] A bolt body, wherein one end of the bolt body is a bolt head and the other end is a bolt rod, and the end of the bolt rod away from the bolt head has an external thread;

[0006] An inner pre-tightening hole, wherein the bolt body is coaxially provided with an inner pre-tightening hole that penetrates through the bolt body;

[0007] An outer protective layer, the outer protective layer is formed outside the bolt body;

[0008] The inner pre-tightening component is arranged in the inner pre-tightening hole.

[0009] In the above technical solution, further, it also includes:

[0010] Cutting grooves, wherein a plurality of cutting grooves are arranged at one end of the bolt shank with the external thread of the bolt body and extend toward the middle of the external thread;

[0011] The downward movement of the inner preload member causes the outer wall of the bolt rod with the groove to expand outward.

[0012] In the above technical solution, further, the inner pre-tightening hole includes the following holes which are connected in sequence and have decreasing diameters from the bolt head to the bolt shank:

[0013] An outer floating portion extending inwardly from an end surface of the bolt head;

[0014] An inner placement portion extending from the bolt head into the bolt shank;

[0015] An internal thread portion, the internal thread portion extending into a portion of the bolt shank with external threads;

[0016] The tapered fitting portion extends from the end face of the bolt rod, and the diameter of the tapered fitting portion decreases from the internal threaded portion to the end face of the threaded rod.

[0017] In the above technical solution, further, the internal preload assembly includes:

[0018] A pre-tightening bolt, the pre-tightening bolt being threadedly connected to the internal threaded portion;

[0019] A preload spring, the preload spring being arranged in the inner placement portion;

[0020] A stop ring is arranged at the bottom of the outer floating part.

[0021] In the above technical solution, further, the pre-tightening bolt comprises:

[0022] The end head has a regular hexagonal hole formed inwardly on the end face of the end head;

[0023] A rod portion, which is fixedly connected to the end and has threads on the outside;

[0024] The extrusion part is integrally formed at the end of the rod part, and the extrusion part is interference fit with the tapered fitting part.

[0025] In the above technical solution, further, the end head is slidably matched with the outer floating part, the rod part extends from the inner seating part into the inner threaded part and is threadedly connected with the threaded part; the preload spring is arranged in the inner seating part with one end abutting against the bottom of the inner seating part and the other end abutting against the end head; the stop ring is arranged in the outer floating part with one end abutting against the bottom of the outer floating part and the other end abutting against the end head.

[0026] In the above technical solution, further, the groove extends to the connection between the internal threaded portion and the tapered fitting portion.

[0027] In the above technical solution, further, the stop ring includes:

[0028] A support ring, the support ring rests against the bottom of the outer floating portion;

[0029] The supporting parts are evenly distributed on the inner wall of the supporting ring according to the circumference, and the supporting parts extend toward the end of the pre-tightening bolt.

[0030] The beneficial effects of the utility model are:

[0031] 1. The setting of the outer protective layer can ensure the overall corrosion resistance of the bolt;

[0032] 2. The cooperation between the internal pre-tightening component and the internal pre-tightening hole can improve the overall anti-retraction and anti-loosening effect of the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the utility model;

[0034] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0035] Figure 3 It is a structural diagram of the stop-retracting ring;

[0036] The markings in the figure are: 1-bolt body, 2-internal pretightening hole, 2a-external floating part, 2b-internal seating part, 2c-internal threaded part, 2d-tapered fitting part, 3-groove, 4-pretightening bolt, 4a-end, 4b-rod, 4c-extrusion part, 5-pretightening spring, 6-stop ring, 6a-support ring, 6b-support part. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0038] Embodiment 1:

[0039] This embodiment provides a corrosion-resistant tire bolt, comprising:

[0040] A bolt body 1, wherein one end of the bolt body 1 is a bolt head and the other end is a bolt rod, and the end of the bolt rod away from the bolt head has an external thread;

[0041] Internal pre-tightening hole 2: the bolt body 1 is coaxially provided with an internal pre-tightening hole 2 that penetrates through the bolt body 1;

[0042] An outer protective layer, which is formed outside the bolt body 1;

[0043] An internal pre-tightening component is arranged in the internal pre-tightening hole 2 .

[0044] In this embodiment, the outer protective layer is a corrosion-resistant coating, and the inner pre-tightening hole 2 is provided with an outer protective layer; the cooperation between the inner pre-tightening hole 2 and the inner pre-tightening member can pre-tighten and prevent the bolts from loosening after being fixed, thereby improving the safety of the tire and even the car.

[0045] Embodiment 2:

[0046] This embodiment provides a corrosion-resistant tire bolt, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0047] Also includes:

[0048] A plurality of grooves 3 are provided at one end of the bolt shank with the external thread of the bolt body 1 and extend toward the middle of the external thread;

[0049] The downward movement of the inner preload member causes the outer wall of the bolt rod with the groove 3 to expand outward.

[0050] In this embodiment, the provision of the cut groove 3 enables the bottom outer wall of the bolt rod to expand, thereby improving the strength of the connection between the bolt and the threaded hole or the nut and the effect of preventing retreat and loosening.

[0051] Embodiment 3:

[0052] This embodiment provides a corrosion-resistant tire bolt, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0053] The inner pre-tightening hole 2 includes the following holes which are connected in sequence and have decreasing diameters from the bolt head to the bolt shank:

[0054] An outer floating portion 2a extending inwardly from an end surface of the bolt head;

[0055] An inner placement portion 2b, the inner placement portion 2b extends from the bolt head into the bolt shank;

[0056] An internal threaded portion 2c, the internal threaded portion 2c extending into a portion of the bolt shank with external threads;

[0057] The tapered fitting portion 2d extends from the end face of the bolt rod, and the diameter of the tapered fitting portion 2d decreases from the internal threaded portion 2c to the end face of the threaded rod.

[0058] In this embodiment, the inner seating portion 2b can facilitate the placement of components in the internal preload assembly, while the inner threaded portion 2c can facilitate the connection of the internal preload assembly, and the tapered fitting portion 2d and the inner threaded portion 2c gradually decrease in diameter toward the end face of the threaded rod, which is more conducive to the expansion of the outer wall at the bottom of the bolt rod when the internal preload assembly moves downward.

[0059] Embodiment 4:

[0060] This embodiment provides a corrosion-resistant tire bolt, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0061] The internal preload components include:

[0062] A pre-tightening bolt 4, which is threadedly connected to the internal threaded portion 2c;

[0063] A preload spring 5, which is disposed in the inner placement portion 2b;

[0064] The stop ring 6 is arranged at the bottom of the outer floating portion 2a.

[0065] In this embodiment, the setting of the pre-tightening bolt 4 can squeeze the conical fitting portion 2d, so that the end of the initial bolt rod expands, thereby achieving the effect of preventing retreat; and the setting of the pre-tightening spring 5 and the anti-retreat ring 6 can prevent the pre-tightening bolt 4 from loosening, thereby further improving the overall anti-retreat and anti-loosening effect of the tire bolt.

[0066] Embodiment 5:

[0067] This embodiment provides a corrosion-resistant tire bolt, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] The pre-tightening bolt 4 comprises:

[0069] The end 4a has a regular hexagonal hole formed inwardly on the end surface of the end 4a;

[0070] The rod portion 4b is fixedly connected to the end portion 4a and has threads on the outside;

[0071] The extrusion portion 4c is integrally formed at the end of the rod portion 4b, and the extrusion portion 4c is interference fit with the tapered fitting portion 2d.

[0072] In this embodiment, the regular hexagonal hole on the end can facilitate loosening or tightening of the pre-tightening bolt 4 by means of an inner hexagonal wrench, and the rod portion 4b cooperates with the internal threaded portion 2c, and the extrusion portion 4c is interference fit with the latest mating portion, so that during the tightening process of the pre-tightening bolt 4, the extrusion portion 4c is urged to squeeze the conical mating portion 2d, causing the outer wall of the bolt rod to expand and deform outward.

[0073] Embodiment 6:

[0074] This embodiment provides a corrosion-resistant tire bolt, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0075] The end cap 4a is slidably matched with the outer floating portion 2a, the rod portion 4b extends from the inner seating portion 2b into the inner threaded portion 2c and is threadedly connected to the threaded portion; the preload spring 5 is arranged in the inner seating portion 2b with one end abutting against the bottom of the inner seating portion 2b and the other end abutting against the end cap 4a; the stop ring 6 is arranged in the outer floating portion 2a with one end abutting against the bottom of the outer floating portion 2a and the other end abutting against the end cap 4a.

[0076] In this embodiment, the end head 4a is slidably matched with the outer floating portion 2a and a gap is formed between the end head 4a and the bottom of the outer floating portion 2a, so that the pre-tightening bolt 4 can be screwed smoothly; and the pre-tightening spring 5 is against between the seating portion and the end head 4a, so that the pre-tightening spring 5 can play a good elastic support effect on the pre-tightening bolt 4, thereby preventing the pre-tightening bolt 4 from loosening; and the setting of the back-stop ring 6 can further play an anti-loosening effect.

[0077] Embodiment 7:

[0078] This embodiment provides a corrosion-resistant tire bolt, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0079] The cut groove 3 extends to the junction of the internal thread portion 2c and the tapered fitting portion 2d.

[0080] In this embodiment, the cut groove 3 extends to the connection between the internal threaded portion 2c and the tapered fitting portion 2d, thereby improving the toughness and strength of the end section of the bolt shank.

[0081] Embodiment 8:

[0082] This embodiment provides a corrosion-resistant tire bolt, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0083] The stop ring 6 comprises:

[0084] A support ring 6a, the support ring 6a rests against the bottom of the outer floating portion 2a;

[0085] Support portion 6b, a plurality of support portions 6b are evenly distributed on the inner wall of support ring 6a along the circumference, and support portion 6b extends toward end 4a of pre-tightening bolt 4, and support portion 6b is arc-shaped and extends toward the direction of pre-tightening bolt.

[0086] In this embodiment, the support ring 6a and the support portion 6b are integrally formed and made of elastic metal; the support ring 6a can provide good support for the support portion 6b, and the support portion 6b can elastically rest between the outer floating portion 2a and the end head 4a, thereby providing good support for the pre-tightening bolt 4, thereby achieving the effect of preventing retreat and loosening.

[0087] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A corrosion-resistant tire bolt, characterized in that: include: A bolt body (1), wherein one end of the bolt body (1) is a bolt head and the other end is a bolt rod, and the end of the bolt rod away from the bolt head has an external thread; An inner pre-tightening hole (2), wherein the bolt body (1) is coaxially provided with an inner pre-tightening hole (2) penetrating therethrough; An outer protective layer, wherein the outer protective layer is formed outside the bolt body (1); An internal pre-tightening component is arranged in the internal pre-tightening hole (2).

2. The corrosion-resistant tire bolt according to claim 1, characterized in that: Also includes: Cutting grooves (3), wherein a plurality of the cutting grooves (3) are arranged at one end of the bolt shank of the bolt body (1) with the external thread and extend toward the middle of the external thread; The inner pre-tightening member moves downward to cause the outer wall of the bolt rod with the groove (3) to expand outward.

3. The corrosion-resistant tire bolt according to claim 2, characterized in that: The inner pre-tightening hole (2) includes the following holes which are connected in sequence and have decreasing diameters from the bolt head to the bolt shank: An outer floating portion (2a), the outer floating portion (2a) extending inwardly from the end surface of the bolt head; An inner placement portion (2b), the inner placement portion (2b) extending from the bolt head into the bolt rod; An internal threaded portion (2c), the internal threaded portion (2c) extending into the portion of the bolt shank with an external thread; A tapered fitting portion (2d) extends from the end face of the bolt rod, and the diameter of the tapered fitting portion (2d) decreases from the internal threaded portion (2c) to the end face of the threaded rod.

4. The corrosion-resistant tire bolt according to claim 3, characterized in that: The inner preload assembly comprises: A pre-tightening bolt (4), wherein the pre-tightening bolt (4) is threadedly connected to the internal threaded portion (2c); A preload spring (5), wherein the preload spring (5) is arranged in the inner placement portion (2b); A stop ring (6) is arranged at the bottom of the outer floating part (2a).

5. The corrosion-resistant tire bolt according to claim 4, characterized in that: The pre-tightening bolt (4) comprises: An end cap (4a), wherein a regular hexagonal hole is formed inwardly on the end face of the end cap (4a); A rod portion (4b), wherein the rod portion (4b) is fixedly connected to the end portion (4a) and has threads on the outside; The extrusion portion (4c) is integrally formed at the end of the rod portion (4b), and the extrusion portion (4c) is interference-fitted with the conical fitting portion (2d).

6. The corrosion-resistant tire bolt according to claim 5, characterized in that: The end head (4a) is slidably matched with the outer floating part (2a); the rod part (4b) extends from the inner seating part (2b) into the inner threaded part (2c) and is threadedly connected with the inner threaded part (2c); the preload spring (5) is arranged in the inner seating part (2b) with one end abutting against the bottom of the inner seating part (2b) and the other end abutting against the end head (4a); the stop ring (6) is arranged in the outer floating part (2a) with one end abutting against the bottom of the outer floating part (2a) and the other end abutting against the end head (4a).

7. The corrosion-resistant tire bolt according to claim 6, characterized in that: The cutting groove (3) extends to the connection between the internal threaded portion (2c) and the tapered matching portion (2d).

8. The corrosion-resistant tire bolt according to claim 7, characterized in that: The stop ring (6) comprises: A support ring (6a), wherein the support ring (6a) abuts against the bottom of the outer floating portion (2a); A supporting portion (6b), wherein a plurality of the supporting portions (6b) are evenly distributed on the inner wall of the supporting ring (6a) along a circumference, and the supporting portions (6b) extend toward the end (4a) of the pre-tightening bolt.

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