Hub drum body and hub for tire bursting pressure test

Abstract

The utility model discloses a wheel hub drum body and a wheel hub for a tire bursting pressure test, which belong to the technical field of tire pressure tests, the head end of the wheel hub drum body is provided with a drum body rim, the tail end of the wheel hub drum body comprises a thickened section, the outer wall of the thickened section is provided with a compression ring groove, and the inner wall of the thickened section protrudes inwards along the radial direction to form an annular bulge. The tail end of the hub drum body is subjected to small local design improvement, and the strength of the tail end of the hub drum body is enhanced, so that the non-deformability of the contact parts of the tail end of the hub drum body, the compression ring and the movable steel ring is improved, and the situation that the contact parts shrink inwards due to stress in the test process and consequently the diameter is reduced can be avoided. Therefore, the problems that the compression ring is disengaged and the movable steel ring is disengaged and outburst are prevented, so that the bursting pressure test can be smoothly carried out.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire pressure test technical field, in particular to a kind of hub drum body and hub for tire burst pressure test. BACKGROUND

[0002] During tire burst pressure test process, test tire is needed to be installed on test hub, then the hub after installing tire is placed horizontally in specified test place, then operator is away from test place, water medium is filled into tire cavity by water pump, so that its internal pressure reaches specified pressure, keep specified time, if burst does not occur within specified time, continue to fill medium until burst (or reach test equipment limit), record burst pressure value, burst position and other test data information.

[0003] Test hub mainly includes drum body, press ring and live bead ring, press ring clamping groove is equipped on live bead ring, press ring groove is equipped on drum body, press ring is inserted between two grooves, can ensure that live bead ring does not move axially, limit tire by drum body rim at first end and live bead ring rim.In test process, tire internal water pressure improves, tire bead surface and hub drum body bonding type surface are bonded to form sealing surface, then with tire internal water pressure continuously improving, live bead ring is pushed by tire and tends to move outward along drum body axially, is limited by press ring to ensure that live bead ring does not move. Since the burst pressure of tire is much higher than the rated inflation internal pressure of tire, the stress of contact position of live bead ring, press ring and drum body of hub is high, which can easily cause the drum body to shrink radially, once the drum body shrinks, the press ring can be easily pushed out of the press ring groove of the drum body due to the axial thrust of the live bead ring, resulting in the live bead ring being thrown out of the tire, and the tire burst pressure test fails. SUMMARY

[0004] The utility model discloses a kind of hub drum body and hub for tire burst pressure test, to improve the anti-deformation ability of contact position of hub drum body tail end and press ring, live bead ring, avoid shrinking in contact position, diameter is small in test process, to prevent the problems of press ring being pushed out, live bead ring being thrown out, ensure that the tire burst pressure test is carried out smoothly.

[0005] To achieve the above object, the utility model provides the following scheme: the utility model discloses a kind of hub drum body for tire burst pressure test, the first end of the hub drum body is equipped with drum body rim, the tail end of the hub drum body includes thickening section, press ring groove is equipped on the outer wall of the thickening section, the inner wall of the thickening section is formed into annular protrusion along radial direction.

[0006] Preferably, the thickness of the annular protrusion is 5mm-10mm.

[0007] Preferably, the rear end of the hub drum further includes an extended section, which is located at the rear end of the thickened section.

[0008] Preferably, the axial length of the extended section is 5mm to 20mm.

[0009] Preferably, the outer wall of the extended section is flush with the outer wall of the thickened section, and the inner wall of the extended section is flush with the raised surface of the annular protrusion.

[0010] Preferably, the annular protrusion and the inner wall of the hub drum are connected by a chamfer, and the tail end of the extended section and the inner wall are connected by a chamfer.

[0011] Preferably, the hub drum is provided with a water inlet, which is located between the drum rim and the thickened section, and a water pipe connector is installed at one end of the water inlet inside the hub drum.

[0012] Preferably, the thickened section is provided with a sealing ring groove for installing the sealing ring, and the sealing ring groove is located between the drum body rim and the pressure ring groove.

[0013] A wheel hub for tire burst pressure testing is also disclosed, comprising a live steel ring, a pressure ring, and the aforementioned wheel hub drum. The outer wall of the live steel ring has a live steel ring rim at its tail end, and the inner wall of the live steel ring has a pressure ring groove at its tail end. The pressure ring groove extends to the tail end face of the live steel ring and is used to correspond to the pressure ring groove of the wheel hub drum.

[0014] Preferably, it also includes a sealing ring, which is used to be fitted into the sealing ring groove of the hub drum.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] In this invention, by making minor local design improvements to the tail end of the wheel hub drum, the strength of the tail end of the wheel hub drum is enhanced, thereby improving the deformation resistance of the contact area between the tail end of the wheel hub drum and the pressure ring and the live steel ring. This can prevent the contact area from shrinking inward due to stress during the test, thus preventing the pressure ring from coming off and the live steel ring from coming off and breaking off, so as to ensure the smooth progress of the burst pressure test. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the wheel hub in the embodiment;

[0019] Figure 2 for Figure 1 A magnified view of a portion of the diagram;

[0020] Figure 3 This is a cross-sectional view of the hub drum in the embodiment;

[0021] Figure 4 This is a cross-sectional schematic diagram of the live steel ring in the embodiment.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Hub drum body; 2. Live steel ring; 3. Pressure ring; 4. Sealing ring; 101. Drum body rim; 102. Thickened section; 103. Extended section; 104. Pressure ring groove; 105. Sealing ring groove; 106. Water inlet; 107. Water pipe connector; 201. Live steel ring rim; 202. Pressure ring groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] This embodiment provides a wheel hub drum for tire burst pressure testing, such as... Figures 1 to 4 As shown, the first end of the wheel hub drum 1 is provided with a drum rim 101 for limiting one side of the tire bead. The rear end of the wheel hub drum 1 includes a thickened section 102, and the outer wall of the thickened section 102 is provided with a pressure ring groove 104 for the pressure ring 3 to be partially embedded and positioned. The inner wall of the thickened section 102 bulges radially inward to form an annular protrusion, thereby increasing the thickness of the wheel hub drum 1 where the pressure ring groove 104 is located. This strengthens the contact area between the wheel hub drum 1, the live steel ring 2, and the pressure ring 3, improves the deformation resistance of the contact area, prevents the diameter of the contact area of ​​the wheel hub drum 1 from shrinking, and thus prevents the pressure ring 3 from coming off and causing the live steel ring 2 to break off, ensuring the successful conduct of the burst pressure test.

[0027] By adopting this wheel hub drum 1, while retaining all the original functions, the deformation resistance of the wheel hub drum 1 can be significantly improved through some minor local design improvements. This avoids the problem of local deformation causing the live steel ring 2 to come off the ring, resulting in damage to the wheel hub drum 1 and rendering it unusable.

[0028] In one implementation, such as Figures 1 to 4 As shown, the thickness of the annular protrusion is 5mm to 10mm, meaning that the thickness of the thickened section 102 is 5mm to 10mm thicker than other parts of the wheel hub drum 1. The thickness of a conventionally designed drum varies depending on the tire size, ranging from approximately 15mm to 40mm. However, other parts of the wheel hub drum 1 in this case still use a conventional design thickness of 15mm to 40mm. After the protrusion forms an annular protrusion, the total thickness of the thickened section 102 is equal to 15mm to 40mm plus 5mm to 10mm, which is 5mm to 10mm thicker than before.

[0029] For example, if the original design thickness of the drum body is 35mm, and the drum body 1 of this wheel hub is still 35mm, and the annular protrusion formed by the inner convexity of the thickened section 102 is 5mm, then the total thickness of the thickened section 102 is 40mm. Compared with the conventionally designed drum body of the same size, the area of ​​the pressure ring groove 104 of the wheel hub drum body 1 with the thickened section 102 (that is, the contact area between the wheel hub drum body 1 and the pressure ring 3 and the live steel ring 2) is thickened by 5mm, thereby enhancing the deformation resistance of the contact area.

[0030] In one implementation, such as Figures 1 to 4 As shown, the rear end of the wheel hub drum 1 also includes an extended section 103, which is located at the rear end of the thickened section 102. The axial length of the drum in a conventional design varies depending on the tire size. The portion of the wheel hub drum 1 before the extended section 103 (from the beginning of the wheel hub drum 1 to the end of the thickened section 102) is equivalent to the overall axial length of a drum of the same specification under a conventional design. Therefore, the wheel hub drum 1 with the extended section 103 has an increased axial length compared to a conventionally designed drum of the same specification, thereby enhancing the deformation resistance of the contact area between the wheel hub drum 1 and the pressure ring 3 and the live steel rim 2.

[0031] In one implementation, such as Figures 1 to 4 As shown, the axial length of the extended section 103 is 5mm to 20mm, which means that the length is increased by 5mm to 20mm compared with the conventionally designed drum body of the same specification.

[0032] In one implementation, such as Figures 1 to 4 As shown, the outer wall of the extended section 103 is flush with the outer wall of the thickened section 102, and the inner wall of the extended section 103 is flush with the raised surface of the annular protrusion (i.e., the inner wall surface of the thickened section 102). Therefore, the thickness of the extended section 103 is equal to the total thickness of the thickened section 102. For example, if the drum body is originally designed to be 35mm thick, the annular protrusion is 5mm thick, and the total thickness of the thickened section 102 is 40mm, then the thickness of the extended section 103 is 40mm.

[0033] In one implementation, such asFigures 1 to 4 As shown, apart from the thickened section 102 and the extended section 103, the thickness of the remaining parts of the wheel hub drum 1 (the thickness of non-critical load-bearing parts) can be reduced compared to the thickness of the drum in a conventional design, thus achieving a lightweight design for the wheel hub drum 1. For example, if the original design thickness of the drum is 35mm, the total thickness of the thickened section 102 is 40mm, then the thickness of the extended section 103 is 40mm, and the thickness of the remaining parts of the wheel hub drum 1 is 30mm.

[0034] In one implementation, such as Figures 1 to 4 As shown, the annular protrusion and the inner wall of the hub drum 1 are connected by a chamfer, and the tail end of the extended section 103 and the inner wall are connected by a chamfer to avoid abrupt changes in shape and reduce local stress concentration.

[0035] In one implementation, such as Figures 1 to 4 As shown, the pressure ring groove 104 and the outer wall of the hub drum 1 are connected by a chamfer to reduce local stress concentration.

[0036] In one implementation, such as Figures 1 to 4 As shown, the hub drum 1 is provided with a water inlet 106, which is located between the drum rim 101 and the thickened section 102. A water pipe connector 107 is installed at one end of the water inlet 106 inside the hub drum 1. A water injection pipe can be connected through the water pipe connector 107, so that water can be injected into the inner cavity of the tire mounted on the hub drum 1 through the water pipe connector 107 and the water inlet 106.

[0037] In one implementation, such as Figures 1 to 4 As shown, the thickened section 102 is provided with a sealing ring groove 105 for the installation of the sealing ring 4. The sealing ring groove 105 is located between the drum body rim 101 and the pressure ring groove 104, which improves the sealing performance between the live steel ring 2 and the hub drum body 1.

[0038] Example 2

[0039] This embodiment provides a wheel hub for tire burst pressure testing, such as... Figures 1 to 4 As shown, the wheel includes the hub drum 1, the movable steel ring 2, and the pressure ring 3 as in Embodiment 1. The outer wall of the movable steel ring 2 has a movable steel ring rim 201 at its tail end, and the inner wall of the movable steel ring 2 has a pressure ring groove 202 at its tail end, with the groove wall extending to the tail end face of the movable steel ring 2. After the movable steel ring 2 is fitted onto the hub drum 1 and pressed tightly, the pressure ring groove 202 of the movable steel ring 2 corresponds exactly to the pressure ring groove 104.

[0040] Test procedure: Place the wheel hub drum 1 horizontally on the ground or platform, with the drum rim 101 of the wheel hub drum 1 in contact with the ground or platform. Then, put the tire on the wheel hub drum 1, with one side of the tire bead fitting against the drum rim 101. Place the live steel ring 2 with the first end facing the ground on the wheel hub drum 1, with the other side of the tire bead fitting against the live steel ring rim 201. Then, put the pressure ring 3 on the wheel hub drum 1. The inner ring of the pressure ring 3 is embedded in the pressure ring groove 104, and the outer ring of the pressure ring 3 is embedded in the pressure ring slot 202, thereby holding the live steel ring 2 in place. This completes the assembly of the wheel hub and tire. The wheel hub can then be sent to the test site for tire burst pressure testing.

[0041] In one implementation, such as Figures 1 to 4 As shown, the inner walls of the pressure ring groove 202 and the live steel ring 2 are transitioned by chamfering.

[0042] In one implementation, such as Figures 1 to 4 Figures 1 to 4 Figures 1 to 4 As shown, it also includes a sealing ring 4, which is used to be fitted into the sealing ring groove 105.

[0043] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A wheel hub drum for tire burst pressure testing, characterized in that, The first end of the hub drum is provided with a drum rim, and the tail end of the hub drum includes a thickened section. The outer wall of the thickened section is provided with a pressure ring groove, and the inner wall of the thickened section convexes radially to form an annular protrusion.

2. The wheel hub drum for tire burst pressure testing according to claim 1, characterized in that, The thickness of the annular protrusion is 5mm to 10mm.

3. The wheel hub drum for tire burst pressure testing according to claim 1 or 2, characterized in that, The rear end of the hub drum also includes an extended section, which is located at the rear end of the thickened section.

4. The wheel hub drum for tire burst pressure testing according to claim 3, characterized in that, The axial length of the extended section is 5mm to 20mm.

5. The wheel hub drum for tire burst pressure testing according to claim 3, characterized in that, The outer wall of the extended section is flush with the outer wall of the thickened section, and the inner wall of the extended section is flush with the raised surface of the annular protrusion.

6. The wheel hub drum for tire burst pressure testing according to claim 3, characterized in that, The annular protrusion transitions to the inner wall of the hub drum through a chamfer, and the tail end of the extended section transitions to the inner wall through a chamfer.

7. The wheel hub drum for tire burst pressure testing according to claim 1, characterized in that, The hub drum is provided with a water inlet, which is located between the rim of the drum and the thickened section. A water pipe connector is installed at one end of the water inlet inside the hub drum.

8. The wheel hub drum for tire burst pressure testing according to claim 1, characterized in that, The thickened section is provided with a sealing ring groove for installing the sealing ring, and the sealing ring groove is located between the drum body rim and the pressure ring groove.

9. A wheel hub for tire burst pressure testing, characterized in that, The wheel hub includes a live steel ring, a pressure ring, and a hub drum body as described in any one of claims 1 to 8. The outer wall of the live steel ring has a live steel ring rim at its tail end, and the inner wall of the live steel ring has a pressure ring groove at its tail end. The pressure ring groove extends to the tail end face of the live steel ring and is used to correspond to the pressure ring groove of the hub drum body.

10. The wheel hub for tire burst pressure testing according to claim 9, characterized in that, It also includes a sealing ring for fitting into the sealing ring groove of the hub drum as described in claim 8.

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