Vulcanizing machine center mechanism piston and vulcanizing machine center mechanism

Abstract

The utility model relates to a vulcanizing machine center mechanism piston and a vulcanizing machine center mechanism, the vulcanizing machine center mechanism piston comprises a body, one end of the body protrudes outwards to form a boss, the boss is provided with at least two first grooves used for installing an outer sealing ring, and the first grooves are arranged in parallel at intervals; a cavity used for installing a piston rod is arranged in the body, the cavity is of a variable-diameter structure, and a second groove used for installing an inner sealing ring is formed in the cavity wall of the cavity. The technical problems that in the prior art, a sealing ring on a piston is poor in stability, a vulcanizing machine center mechanism is prone to water leakage, and a capsule is broken due to clamping can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tire vulcanization, and particularly relates to a piston of a central mechanism of a vulcanizer and a central mechanism of a vulcanizer. Background Art

[0002] Vulcanizers are favored by various tire manufacturers for their stability and high cost performance. The central mechanism is the core part of the vulcanizer, and its function is to install the bladder into the tire blank and shape it before vulcanization, and to extract the bladder from the tire after vulcanization to demold the tire. The central mechanism of the vulcanizer uses pressurized water as the power for the mechanism to perform actions. Therefore, its sealing device is an important factor affecting the quality of the central mechanism of the vulcanizer. At present, the sealing ring is mainly fixed on the piston through a gland and bolts. When the pressure of the pressurized water is relatively high, the bolts are easily broken by the water pressure, and the pressurized water breaks through the sealing ring and enters the inside of the bladder, resulting in a decrease in the temperature inside the bladder, and phenomena such as water leakage in the central mechanism and the bladder being pinched and broken. Summary of the Utility Model

[0003] In view of various deficiencies of the prior art, a piston of a central mechanism of a vulcanizer and a central mechanism of a vulcanizer are proposed to solve the technical problems that the sealing ring on the piston of the prior art has poor stability, and the central mechanism of the vulcanizer is prone to water leakage, resulting in the bladder being pinched and broken.

[0004] In a first aspect, the utility model provides a piston of a central mechanism of a vulcanizer, including a body. One end of the body protrudes outward to form a boss, and at least two first grooves for installing an outer sealing ring are provided on the boss in parallel and at intervals. A cavity for installing a piston rod is arranged inside the body, and the cavity is set as a variable-diameter structure. A second groove for installing an inner sealing ring is provided on the cavity wall of the cavity.

[0005] This technical solution is further set as that the side wall of the first groove is set as a stepped structure, and the second groove is set as a rectangular groove.

[0006] This technical solution is further set as that at least two second grooves are provided in parallel and at intervals.

[0007] This technical solution is further set as that the boss and the second groove are both located at the first end of the body. The first end of the body is the inlet end of the piston rod, and the inner diameter of the second groove is greater than the inner diameter of the first end of the body.

[0008] This technical solution is further set as that the first end of the body is provided with a flared opening.

[0009] This technical solution is further configured such that the second end of the body is the output end of the piston rod, the inner diameter of the first end of the body is equal to the inner diameter of the second end of the body, a reduced-diameter section is provided between the first end and the second end of the body, the inner diameter of the reduced-diameter section is greater than the inner diameter of the first end of the body, and the difference between the two is 0.6 - 1.0 mm.

[0010] This technical solution is further configured such that chamfers are provided at the edge of the boss, at the junction of the boss and the body, and at the edge of the body.

[0011] In a second aspect, the present utility model provides a vulcanizer central mechanism, including the piston of the vulcanizer central mechanism described above.

[0012] The beneficial effects of the present utility model are as follows:

[0013] On the basis of maintaining the original diameter size of the piston, it conforms to the cylinder barrel fit. By providing at least two first grooves that are parallel and spaced apart, the contact area between the outer sealing ring and the cylinder barrel is increased, improving the sealing stability; a combined sealing of outer sealing and inner sealing is adopted to improve the sealing performance between the piston and the cylinder barrel and the piston rod, avoiding water leakage; the cavity is set as a reduced-diameter structure, facilitating the assembly of the piston rod and the inner seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the piston of the vulcanizer central mechanism in an embodiment of the present utility model;

[0015] Figure 2 is Figure 1 the A - A cross-sectional view in

[0016] Figure 3 is an assembly diagram of the piston of the vulcanizer central mechanism and the piston rod in an embodiment of the present utility model;

[0017] Figure 4 is Figure 3 the B - B cross-sectional view in

[0018] In the drawings: 100, piston; 101, body; 102, boss; 103, first groove; 104, flared opening; 105, second groove; 106, reduced-diameter section; 107, second chamfer; 108, first chamfer; 109, intermediate sealing ring; 110, side sealing ring; 111, inner sealing ring; 200, piston rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings of the present utility model. Based on the embodiments in this application, other similar embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "upper", "lower", "left", "right", etc., are only with reference to the directions of the accompanying drawings. Therefore, the directional terms used are for illustration rather than to limit the present invention.

[0020] The present utility model will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0021] According to an embodiment of the present utility model, a piston of a vulcanizer central mechanism is provided. Please refer to Figures 1 to 4 , which includes a body 101. One end of the body 101 protrudes outward to form a boss 102. A first groove 103 for installing an outer sealing ring is provided on the boss 102. At least two first grooves 103 are arranged in parallel and at intervals. A cavity for installing a piston rod 200 is provided inside the body 101. The cavity is set as a variable-diameter structure. A second groove 105 for installing an inner sealing ring 111 is provided on the wall of the cavity.

[0022] It should be noted that on the basis of maintaining the original diameter size of the piston 100 and conforming to the cylinder barrel fit, by providing at least two first grooves 103 arranged in parallel and at intervals, the contact area between the outer sealing ring and the cylinder barrel is increased, and the sealing stability is improved; a combined sealing of outer sealing and inner sealing is adopted to improve the sealing performance between the piston 100 and the cylinder barrel and the piston rod 200, and to avoid water leakage; the cavity is set as a variable-diameter structure, which is convenient for the assembly of the piston rod 200 and the inner seal.

[0023] Specifically, the more the number of the first grooves 103, the larger the contact area between the outer sealing ring and the cylinder barrel, and the higher the sealing stability; limited by the structural size, in this embodiment, two first grooves 103 are arranged in parallel and at intervals. Specifically, the minimum groove width of the first groove 103 is 21.5 - 22.5 mm, and the maximum groove width is 28.5 - 29.5 mm.

[0024] In the piston of the vulcanizer central mechanism in the embodiment, please refer to Figures 1 to 4 , the side wall of the first groove 103 is set as a stepped structure, and the second groove 105 is set as a rectangular groove.

[0025] It should be noted that the inner diameter of the outer sealing ring is matched with the second groove 105, and the outer diameter of the outer sealing ring is matched with the cylinder barrel for sealing; the outer sealing ring includes a side sealing ring 110 and an intermediate sealing ring 109. The side sealing rings 110 are located on both sides of the intermediate sealing ring 109, and the side sealing rings 110 on both sides fix the intermediate sealing ring 109; the shape of the side sealing ring 110 matches the stepped structure, the outer surface of the side sealing ring 110 protrudes from the outer surface of the boss 102, and the outer surface of the intermediate sealing ring 109 protrudes from the outer surface of the side sealing ring 110.

[0026] In the piston of the central mechanism of the vulcanizer in the embodiment, please refer to Figures 1 to 4 , at least two second grooves 105 are arranged in parallel and at intervals to form multiple internal seals, improving the sealing stability.

[0027] In the piston of the central mechanism of the vulcanizer in the embodiment, please refer to Figures 1 to 4 , the boss 102 and the second groove 105 are both located at the first end of the body 101. The first end of the body is the inlet end of the piston rod 200, and the inner diameter of the second groove 105 is greater than the inner diameter of the first end of the body 101.

[0028] It should be noted that the piston rod 200 extends from the first end of the body 101 to the outside of the second end of the body 101; the inner diameter of the second groove 105 is greater than the inner diameter of the first end of the body 101 to accommodate the inner sealing ring 111.

[0029] In the piston of the central mechanism of the vulcanizer in the embodiment, please refer to Figures 1 to 4 , the first end of the body 101 is provided with a flared opening 104 to facilitate the assembly of the inner sealing ring 111.

[0030] In the piston of the central mechanism of the vulcanizer in the embodiment, please refer to Figures 1 to 4 , the second end of the body 101 is the output end of the piston rod 200. The inner diameter of the first end of the body 101 is equal to the inner diameter of its second end. A variable diameter section 106 is arranged between the first end and the second end of the body 101. The inner diameter of the variable diameter section 106 is greater than the inner diameter of the first end of the body 101, and the difference between the two is 0.6 - 1.0 mm.

[0031] It should be noted that by setting the variable diameter section 106, the adaptability between the piston rod 200 and the piston 100 is improved, facilitating assembly.

[0032] In the piston of the central mechanism of the vulcanizer in the embodiment, please refer to Figures 1 to 4 , chamfers are provided at the edge of the boss 102, the junction of the boss 102 and the body 101, and the edge of the body 101.

[0033] It should be noted that a first chamfer 108 is provided at the edge of the first end of the boss 102 close to the body 101, which is convenient for assembly with the cylinder barrel; second chamfers 107 are provided at the joint of the boss 102 and the body 101, the edge of the second end of the boss 102 close to the body 101, and the edge of the second end of the body 101, which are used to protect the capsule.

[0034] Specifically, the first chamfer 108 is C5±0.5mm, that is, 5×45°±0.5mm, the basic dimension is 5, the tolerance is ±0.5, 5 is the chamfer width of 5mm, and 45° is the chamfer angle; the second chamfer 107 is C2±0.5mm, that is, 2×45°±0.5mm, the basic dimension is 2, the tolerance is ±0.5, 2 is the chamfer width of 2mm, and 45° is the chamfer angle.

[0035] According to an embodiment of the present invention, a vulcanizer central mechanism is provided, including the piston of the vulcanizer central mechanism described above.

[0036] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention, and the scope of implementation of the present invention cannot be limited. That is, all equal changes and modifications made according to the scope of this application should still fall within the scope covered by the present invention.

Claims

1. A piston for a central mechanism of a vulcanizing machine, characterized in that: It includes a main body, one end of which protrudes outward to form a boss, and a first groove for installing an outer sealing ring is provided on the boss. At least two first grooves are arranged in parallel and spaced apart from each other. A cavity for installing a piston rod is arranged inside the main body, and the cavity is arranged as a variable diameter structure. A second groove for installing an inner sealing ring is provided on the cavity wall.

2. The central mechanism piston of a vulcanizing machine according to claim 1, characterized in that: The sidewall of the first groove is configured as a stepped structure, and the second groove is configured as a rectangular groove.

3. The central mechanism piston of a vulcanizing machine according to claim 1 or 2, characterized in that: At least two of the second grooves are arranged in parallel and spaced apart from each other.

4. The central mechanism piston of a vulcanizing machine according to claim 1, characterized in that: The boss and the second groove are both located at the first end of the body, the first end of the body is the entry end of the piston rod, and the inner diameter of the second groove is greater than the inner diameter of the first end of the body.

5. The central mechanism piston of a vulcanizing machine according to claim 4, characterized in that: The first end of the body is provided with a flared opening.

6. The central mechanism piston of a vulcanizing machine according to claim 4, characterized in that: The second end of the body is the output end of the piston rod, the inner diameter of the first end of the body is equal to the inner diameter of the second end, a reducing section is provided between the first end and the second end of the body, and the inner diameter of the reducing section is larger than the inner diameter of the first end of the body.

7. The central mechanism piston of a vulcanizing machine according to claim 1, characterized in that: The edge of the boss, the junction between the boss and the body, and the edge of the body are all provided with chamfers.

8. A vulcanizing machine center mechanism, characterized in that: The invention comprises the central mechanism piston of a vulcanizing machine as described in any one of claims 1 to 7.

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