Tire vulcanizing machine

Abstract

The utility model discloses a tire vulcanizing machine, which belongs to the technical field of tire molds and comprises a vulcanizing machine ring seat, a center rod is arranged in the center of the vulcanizing machine ring seat, a rotary drum capable of rotating is sleeved on the center rod, a bearing chamber is arranged between the rotary drum and an inner hole of the vulcanizing machine ring seat, and a bearing is arranged in the bearing chamber; a large-diameter stepped hole is formed in the upper end of an inner hole of the vulcanizing machine ring seat, a ring plate is arranged in the large-diameter stepped hole, labyrinth seal is formed between the upper end of an inner hole of the ring plate and the rotary drum, a sealing hole is formed in the lower end of the inner hole of the ring plate, and a first sealing piece is arranged in the sealing hole to isolate an inner cavity of a vulcanizing capsule above the vulcanizing machine ring seat from a bearing cavity. A first taper step with the upper end face being a taper face is arranged at the position, close to the sealing hole, of the rotary drum, an elastic piece is further arranged in the sealing hole, and the elastic piece enables the first sealing piece to abut against the taper face of the first taper step. And meanwhile, the service life of the sealing structure is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of tire molds, in particular to a tire vulcanizer. Background Art

[0002] With the advancement of technology and industry competition, the market has higher and higher requirements for tire vulcanization quality, energy saving and efficiency improvement. The temperature inside the center mechanism is one of the key parameters of the tire vulcanization process, and the stability of the mechanism directly affects the quality and vulcanization efficiency of the tire.

[0003] At present, the central mechanism rotating shaft is fixed in the inner hole of the ring seat with a bearing, and the bearing is directly compressed with a baffle or an elastic retaining ring. In order to prevent the strong airflow from blowing directly into the bearing during the filling and deflation of the capsule, thereby causing the loss of bearing grease, some products have added a rotating seal structure. Since the rotating seal is a contact seal, even if the hardness of the rotating shaft seal position is strengthened, the first seal will still cause irreversible wear on the rotating shaft under high-speed rotation, resulting in seal failure. At the same time, the contact seal will also increase the motor load.

[0004] Since the bearing is installed inside the central mechanism, disassembly and maintenance requires downtime, which is time-consuming and inconvenient. Therefore, it is very necessary to develop a new structure to slow down the air flow in the central mechanism chamber, thereby protecting the grease in the bearing from flowing out and increasing the service life of the bearing.

[0005] In view of the above problems, the utility model designs and manufactures a tire vulcanizing machine to overcome the above defects. Utility Model Content

[0006] In order to solve the problems existing in the prior art, the utility model provides a tire vulcanizer which can prevent the high-pressure medium from blowing away the grease in the bearing chamber of the central mechanism rotating shaft when the heating medium is filled into the vulcanizing bladder, while ensuring the service life of the sealing structure.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a tire vulcanizer, comprising a vulcanizer ring seat, a central channel is provided at the center of the vulcanizer ring seat, a central rod is provided in the central channel, a rotatable drum is sleeved on the central rod, a bearing chamber is provided between the rotating drum and the inner wall of the central channel, and a bearing is provided in the bearing chamber;

[0008] A large-diameter stepped hole is provided at the upper end of the central channel, the large-diameter stepped hole is located above the bearing chamber, a ring plate is provided in the large-diameter stepped hole, a labyrinth seal is formed between the upper end of the inner hole of the ring plate and the rotating drum, a sealing hole is provided at the lower end of the inner hole of the ring plate, a first sealing member is provided in the sealing hole, and the first sealing member isolates the inner cavity of the vulcanizing bladder above the ring seat of the vulcanizer from the bearing chamber;

[0009] The rotary drum is provided with a first tapered step whose upper end surface is a tapered surface near the sealing hole. An elastic member is also provided in the sealing hole. The elastic member enables the first sealing member to abut against the tapered surface of the first tapered step.

[0010] Preferably, the lower end surface of the vulcanizer ring seat is supported by a support cylinder, and the rotating cylinder is located in the support cylinder;

[0011] A sealing cavity is provided at the upper end of the inner hole of the support cylinder, and a second sealing member is provided in the sealing cavity. The second sealing member isolates the bearing cavity from the gap between the support cylinder and the rotating cylinder.

[0012] Preferably, the bearing cavity comprises an upper bearing cavity and a lower bearing cavity, and the upper bearing cavity and the lower bearing cavity are separated by an annular partition;

[0013] Bearings are arranged in the upper bearing cavity and the lower bearing cavity.

[0014] Preferably, a lower boss is provided on the lower end surface of the ring plate, and the lower boss can abut against the bearing in the bearing chamber.

[0015] Preferably, a lower supporting boss is fixedly provided on the rotating drum near the sealing cavity, and the bottom of the bearing can abut against the lower supporting boss.

[0016] Preferably, a positioning hole is provided at the lower end of the central channel, the positioning hole is located below the bearing chamber, and a positioning boss is provided on the upper end surface of the support tube to cooperate with the positioning hole.

[0017] Preferably, a baffle is supported on the positioning boss, and the bottom of the bearing can abut against the baffle.

[0018] Preferably, the drum is provided with a second tapered step whose upper end surface is a tapered surface near the sealing chamber, and an elastic member is also provided between the second sealing member and the baffle, and the elastic member makes the second sealing member abut against the tapered surface of the second tapered step.

[0019] Preferably, the elastic member is configured as a wave spring.

[0020] Preferably, the rotating drum extends upward into the inner cavity of the vulcanizing bladder, and a stirring member is connected to the upper end of the rotating drum.

[0021] The utility model is beneficial in that:

[0022] 1. When the heating medium is filled into the vulcanizing bladder of the utility model, it can prevent the pressure difference caused by the high-pressure medium rushing into the bladder in a short time from blowing away the grease in the bearing chamber and causing rotational wear. Specifically, when the pressure in the vulcanizing bladder is higher than the pressure in the bearing chamber, the first sealing member moves downward, thereby isolating the inner cavity of the vulcanizing bladder from the bearing chamber.

[0023] 2. Even if the first seal of the utility model is worn, the elastic member can keep the first seal against the tapered surface, so the first seal can still ensure sealing, further preventing the high-pressure medium from blowing away the grease. The seal can always be maintained, thus avoiding the problem of high-pressure and high-temperature medium entering the bearing chamber after the seal of the ordinary vulcanizer is worn.

[0024] 3. The first seal of the utility model is arranged between the elastic member and the tapered surface, so that the first seal has a floating characteristic. When the internal pressure of the vulcanization bladder is relatively low, the first seal is only pressed against the tapered surface by the elastic force of the elastic member. The friction between the first seal and the tapered surface is smaller than when the internal pressure of the vulcanization bladder is relatively high. The rotation of the drum when the internal pressure of the vulcanization bladder is relatively low can reduce the wear of the first seal. At the same time, compared with the direct contact sealing method, this structure can also reduce the load rate of the driving device that drives the drum to rotate to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a tire vulcanizing machine;

[0026] Figure 2 It is a partial schematic diagram of a tire vulcanizing machine;

[0027] Figure 3 It is a partial schematic diagram of a bearing chamber of a tire vulcanizer;

[0028] Figure 4 The present invention is a partial schematic diagram of a tire vulcanizer bearing chamber in which the second seal is a floating seal structure.

[0029] In the figure: 1-vulcanizer ring seat, 2-center rod, 3-vulcanizing capsule, 4-upper clamping assembly, 5-lower clamping assembly, 6-support cylinder, 7-rotating cylinder, 8-heating component, 9-stirring member, 10-ring plate, 11-bearing, 12-annular partition, 13-labyrinth seal, 14-elastic member, 15-first seal, 16-first tapered step, 17-baffle, 18-positioning boss, 19-second seal, 20-second tapered step. DETAILED DESCRIPTION

[0030] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0031] like Figures 1 to 4 As shown, a tire vulcanizer comprises a vulcanizer ring seat 1, a center channel is provided at the center of the vulcanizer ring seat 1, a center rod 2 is provided in the center channel, an upper clamping assembly 4 is fixedly connected to the upper end of the center rod 2, and the upper clamping assembly 4 can clamp the upper clamping edge of the vulcanizing bladder 3, a lower clamping assembly 5 is fixedly connected to the vulcanizer ring seat 1, and the lower clamping assembly 5 can clamp the lower clamping edge of the vulcanizing bladder 3,

[0032] The center rod 2 can move in the up-down direction relative to the lower clamping assembly 5, so as to realize the contraction and expansion of the vulcanization bladder 3. When the center rod 2 moves upward, the distance between the lower clamping assembly 5 and the upper clamping assembly 4 can be increased, so that the radius of the vulcanization bladder 3 is reduced and contracted. When the center rod 2 moves downward, the distance between the lower clamping assembly 5 and the upper clamping assembly 4 is reduced, and the radius of the vulcanization bladder 3 is increased. After the vulcanization bladder 3 is filled with gas medium, the vulcanization bladder 3 is expanded.

[0033] Specifically, during the vulcanization operation, the center rod 2 is first raised, and the tire to be vulcanized is placed on the outer periphery of the vulcanization bladder 3, and then the center rod 2 is lowered to expand the vulcanization bladder 3, so that the tire is tightly wrapped on the vulcanization bladder 3. Preferably, a heating component 8 is provided on the vulcanizer ring seat 1, and as pressurized nitrogen is injected into the closed space in the vulcanization bladder 3 and heated by the heating component 8, the heated and pressurized nitrogen heats and pressurizes the tire from the inside through the vulcanization bladder 3, and at the same time, the mold heats and pressurizes the tire from the outside to achieve vulcanization of the tire.

[0034] The utility model has a central rod 2 on which a rotatable drum 7 is sleeved. The drum 7 extends upward into the inner cavity of the vulcanization capsule 3. The upper end of the drum 7 is connected to a stirring member 9. The stirring member 9 is driven by the drum 7 to make the gas medium in the vulcanization capsule 3 flow. The flow helps to make the temperature of the gas medium in the vulcanization capsule 3 uniform.

[0035] Specifically, a bearing chamber is provided between the rotating drum 7 and the inner wall of the central channel, and a bearing 11 is provided in the bearing chamber; a large-diameter step hole is provided at the upper end of the central channel of the utility model, the large-diameter step hole is located above the bearing chamber, a ring plate 10 is provided in the large-diameter step hole, a labyrinth seal 13 is formed between the upper end of the inner hole of the ring plate 10 and the rotating drum 7, a sealing hole is provided at the lower end of the inner hole of the ring plate 10, a first sealing member 15 is provided in the sealing hole, the first sealing member 15 isolates the inner cavity of the vulcanizing bladder 3 above the vulcanizer ring seat 1 from the bearing chamber, and the material of the first sealing member 15 may be fluororubber, polytetrafluoroethylene, etc.

[0036] A first tapered step 16 with a tapered upper end surface is provided on the rotating drum 7 near the sealing hole. An elastic member 14 is also provided in the sealing hole. The elastic member 14 enables the first sealing member 15 to abut against the tapered surface of the first tapered step 16. The elastic member 14 is preferably configured as a wave spring, which abuts against the tapered surfaces of the uppermost end of the sealing hole and the first tapered step 16 respectively.

[0037] When the heating medium is filled into the vulcanizing bladder 3 of the utility model, it is possible to prevent the pressure difference caused by the high-pressure medium rushing into the bladder 3 in a short period of time from blowing away the grease in the bearing chamber and causing rotational wear. Specifically, when the pressure in the vulcanizing bladder 3 is higher than the pressure in the bearing chamber, the first sealing member 15 moves downward, thereby isolating the inner cavity of the vulcanizing bladder 3 from the bearing chamber. Moreover, even if the first sealing member 15 is worn, the elastic member 14 can keep the first sealing member 15 in contact with the tapered surface, so the first sealing member 15 can still ensure sealing.

[0038] In addition, since the first seal 15 is arranged between the elastic member 14 and the tapered surface, the first seal 15 has a floating characteristic. When the pressure inside the vulcanization bladder 3 is relatively small, the first seal 15 is pressed against the tapered surface only by the elastic force of the elastic member 14. The friction between the first seal 15 and the tapered surface is smaller than when the pressure inside the vulcanization bladder 3 is relatively large. When the drum 7 rotates when the pressure inside the vulcanization bladder 3 is relatively small, the wear of the first seal 15 can be reduced. At the same time, compared with the direct contact sealing method, this structure can also reduce the load rate of the driving device that drives the drum 7 to rotate to a certain extent.

[0039] The lower end surface of the vulcanizer ring seat 1 of the utility model supports a support cylinder 6, a rotating cylinder 7 is located in the support cylinder 6, a sealing cavity is provided at the upper end of the inner hole of the support cylinder 6, a second sealing member 19 is provided in the sealing cavity, and the second sealing member 19 isolates the bearing chamber from the gap between the support cylinder 6 and the rotating cylinder 7.

[0040] In order to ensure the positioning stability of the bearing 11 in the bearing chamber, a lower boss is provided on the lower end surface of the ring plate 10 of the utility model, and the lower boss can abut against the bearing 11 in the bearing chamber. A lower supporting boss is fixedly provided on the rotating drum 7 near the sealing chamber, and the bottom of the bearing 11 can abut against the lower supporting boss.

[0041] The lower end of the central channel is preferably provided with a positioning hole, which is located below the bearing chamber. The upper end surface of the support cylinder 6 is provided with a positioning boss 18 that cooperates with the positioning hole. The positioning boss 18 supports a baffle 17, and the bottom of the bearing 11 can abut against the baffle 17, thereby achieving support for the bearing 11.

[0042] The bearing 11 cavity of the utility model preferably includes an upper bearing 11 cavity and a lower bearing 11 cavity, the upper bearing 11 cavity and the lower bearing 11 cavity are separated by an annular partition 12, and bearings 11 are arranged in both the upper bearing 11 cavity and the lower bearing 11 cavity.

[0043] In the present invention, since the environmental pressure below the bearing chamber is relatively stable, the second seal 19 can directly use a common contact seal, such as a rotary seal, or a floating seal structure similar to the first seal 15, which can reduce the rotary load and increase the service life of the seal. Figure 4As shown, the drum 7 is provided with a second tapered step 20 with a tapered upper end surface near the sealing chamber, and an elastic member 14 is also provided between the second sealing member 19 and the baffle 17 , and the elastic member 14 makes the second sealing member 19 abut against the tapered surface of the second tapered step 20 .

[0044] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A tire vulcanizing machine, characterized in that: The vulcanizer ring seat (1) comprises a central channel at the center of the vulcanizer ring seat (1), a central rod (2) is arranged in the central channel, a rotating drum (7) is sleeved on the central rod (2), a bearing chamber is arranged between the rotating drum (7) and the inner wall of the central channel, and a bearing (11) is arranged in the bearing chamber; A large-diameter stepped hole is provided at the upper end of the central channel, the large-diameter stepped hole is located above the bearing chamber, a ring plate (10) is provided in the large-diameter stepped hole, a labyrinth seal (13) is formed between the upper end of the inner hole of the ring plate (10) and the rotating drum (7), a sealing hole is provided at the lower end of the inner hole of the ring plate (10), a first sealing member (15) is provided in the sealing hole, and the first sealing member (15) isolates the inner cavity of the vulcanizing bladder (3) above the vulcanizer ring seat (1) from the bearing chamber; The rotary drum (7) is provided with a first tapered step (16) whose upper end surface is a tapered surface near the sealing hole. An elastic member (14) is also provided in the sealing hole. The elastic member (14) enables the first sealing member (15) to abut against the tapered surface of the first tapered step (16).

2. A tire vulcanizer according to claim 1, characterized in that: The lower end surface of the vulcanizer ring seat (1) is supported by a support cylinder (6), and the rotating cylinder (7) is located in the support cylinder (6); A sealing cavity is provided at the upper end of the inner hole of the support cylinder (6), and a second sealing member (19) is provided in the sealing cavity. The second sealing member (19) isolates the bearing cavity from the gap between the support cylinder (6) and the rotating cylinder (7).

3. A tire vulcanizer according to claim 1, characterized in that: The bearing (11) cavity comprises an upper bearing (11) cavity and a lower bearing (11) cavity, and the upper bearing (11) cavity and the lower bearing (11) cavity are separated by an annular partition (12); Bearings (11) are provided in both the upper bearing (11) cavity and the lower bearing (11) cavity.

4. A tire vulcanizer according to claim 1, characterized in that: The lower end surface of the ring plate (10) is provided with a lower boss, and the lower boss can abut against the bearing (11) in the bearing chamber.

5. A tire vulcanizer according to claim 1, characterized in that: The rotating drum (7) is fixedly provided with a lower supporting boss near the sealing chamber, and the bottom of the bearing (11) can abut against the lower supporting boss.

6. A tire vulcanizer according to claim 2, characterized in that: A positioning hole is provided at the lower end of the central channel, and the positioning hole is located below the bearing chamber. A positioning boss (18) is provided on the upper end surface of the support cylinder (6) to cooperate with the positioning hole.

7. A tire vulcanizer according to claim 6, characterized in that: A baffle (17) is supported on the positioning boss (18), and the bottom of the bearing (11) can abut against the baffle (17).

8. A tire vulcanizer according to claim 7, characterized in that: The rotary drum (7) is provided with a second tapered step (20) whose upper end surface is a tapered surface near the sealing chamber, and an elastic member (14) is also provided between the second sealing member (19) and the baffle (17), and the elastic member (14) enables the second sealing member (19) to abut against the tapered surface of the second tapered step (20).

9. A tire vulcanizer according to claim 1 or 8, characterized in that: The elastic member (14) is configured as a wave spring.

10. A tire vulcanizer according to claim 1, characterized in that: The rotating drum (7) extends upward into the inner cavity of the vulcanizing bladder (3), and a stirring member (9) is connected to the upper end of the rotating drum (7).

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