Central mechanism for engineering tire vulcanizing machine

Abstract

The utility model provides a central mechanism for an engineering tire vulcanizing machine, which solves the technical problem that the extension length of a piston rod of the existing central mechanism is fixed, so that the vulcanizing production requirements of engineering tires with different section widths cannot be met. The center mechanism is provided with a connection adjusting mechanism which is in threaded connection with the end, extending out of the cylinder body, of a piston rod of the oil cylinder. An axial blind hole is formed in the end, stretching out of a cylinder body, of a piston rod of the oil cylinder, the inner side wall of the axial blind hole is sequentially provided with a smooth round hole section and an internal thread round hole section in a communicating mode from top to bottom, and the smooth round hole section is arranged at the position close to an orifice of the axial blind hole. The connecting adjusting mechanism is sequentially provided with an adjusting column, a connecting clamping column and a connecting cylinder from top to bottom, and the connecting cylinder is sequentially provided with a smooth cylinder section and an external thread cylinder section from top to bottom; the external thread cylindrical section and the internal thread round hole section are in adaptive connection through threads, and the smooth cylindrical section and the smooth round hole section are in clearance fit or transition fit; the device can be widely applied to the technical field of engineering tire vulcanizers.

Description

Technical Field

[0001] The present application relates to the technical field of engineering tire vulcanizers, and in particular to a central mechanism for engineering tire vulcanizers. Background Art

[0002] Engineering tires are tires installed on large engineering vehicles such as dump trucks, bulldozers or loaders. The specifications of engineering tires are 36.00-51, and the diameter can reach 3.233 meters; the current specifications of engineering tires have reached 40.00-57. Different from load-carrying radial tires and passenger car tires, bias engineering tires have large specifications and slow speeds. They face extremely harsh working conditions and have high requirements for self-cleaning, load-bearing, puncture resistance and heat dissipation. Their formula, structure, preparation method and other aspects are completely different from those of load-carrying radial tires and passenger car tires.

[0003] Different from the vulcanization method of radial load tires and passenger car tires, the vulcanization method of engineering tires includes the steps of installing the vulcanization bladder, inputting the shaping steam into the vulcanization bladder, mold positioning, mold locking, mold locking pressurization, external temperature steam input, inputting pressurized water into the vulcanization bladder, inputting superheated water into the vulcanization bladder for vulcanization, and mold opening. In the vulcanization process of engineering tires, the central mechanism of the engineering tire vulcanizer is an important component for manipulating the vulcanization bladder. The cross-sectional width of engineering tire molds is varied. According to preliminary statistics, the cross-sectional width of engineering tires produced by our company is usually 250 to 530 mm, and there are even engineering tires with a width of more than 530 mm. However, the extended length of the piston rod of the central mechanism of the engineering tire vulcanizer is fixed, which cannot meet the vulcanization production requirements of engineering tires with different cross-sectional widths. Summary of the invention

[0004] The utility model aims to solve the deficiencies of the above-mentioned technology and provide a central mechanism for an engineering tire vulcanizer to meet the vulcanization production requirements of engineering tires with different section widths.

[0005] To this end, the utility model provides a central mechanism for an engineering tire vulcanizer, the central mechanism is provided with an oil cylinder, the oil cylinder is provided with a piston, a piston rod and a cylinder body, and is characterized in that the central mechanism is also provided with a connecting adjustment mechanism, and the connecting adjustment mechanism is connected to one end of the piston rod of the oil cylinder extending out of the cylinder body through a threaded connection;

[0006] An axial blind hole is provided at one end of the piston rod of the oil cylinder extending out of the cylinder body, and a smooth circular hole section and an internally threaded circular hole section are coaxially connected in sequence from top to bottom, and the smooth circular hole section is arranged near the orifice of the axial blind hole;

[0007] The connecting and adjusting mechanism is connected with an adjusting column and a connecting cylinder from top to bottom, and the connecting cylinder is coaxially connected with a smooth cylindrical section and an externally threaded cylindrical section in sequence from top to bottom; the externally threaded cylindrical section and the internally threaded circular hole section are connected by threaded adaptation, and the smooth cylindrical section and the smooth circular hole section are clearance-fitted or transition-fitted.

[0008] Preferably, the connection adjustment mechanism is further provided with a connection clamping column, the adjustment column and the connection cylinder are connected through the connection clamping column, and the three are coaxially connected and arranged in sequence from top to bottom; the connection clamping column is rotatably clamped at the orifice of the axial blind hole.

[0009] Preferably, the adjusting column is provided with a circumferential annular groove.

[0010] Preferably, the central mechanism is also provided with a cooling device, in which a cooling channel is provided, and the cooling channel is respectively connected to the cooling medium inlet and the cooling medium outlet; the cooling device is sealed and connected to the upper opening of the oil cylinder, and the piston rod seals and extends upward through the cooling device.

[0011] Preferably, the piston rod and the cooling device are sealed and connected in sequence from top to bottom with a high-temperature resistant dustproof sealing ring, a waterproof sealing ring, an oil-proof sealing ring, and a guide sealing ring.

[0012] Preferably, a piston guide sealing ring and a piston oil-proof sealing ring are provided between the piston and the inner wall of the cylinder body in a sealing connection from top to bottom.

[0013] Preferably, the cylinder body is connected to a first oil inlet and outlet and a second oil inlet and outlet, the first oil inlet and outlet is arranged above the piston, and the second oil inlet and outlet is arranged below the piston; the first oil inlet and outlet is connected to a first joint, and the second oil inlet and outlet is connected to a second joint through a pipeline.

[0014] Preferably, the adjustment column is composed of an outer cylinder and an inner rod, the inner rod is sleeved in the outer cylinder to form a two-section telescopic rod structure; the fixing bolt passes through the outer cylinder and is detachably connected to the inner rod.

[0015] The beneficial effect of the utility model is as follows: the utility model provides a central mechanism for an engineering tire vulcanizer, which realizes the threaded connection between the connecting adjustment mechanism and the piston rod of the oil cylinder through the threaded adapter connection setting between the external threaded cylindrical section and the internal threaded circular hole section. When it is necessary to change the vulcanization production of engineering tires with different cross-sectional widths, the operator disassembles and replaces the mold used for the engineering tire required by the order, and does not need to replace the entire central mechanism, but only needs to replace the connecting adjustment mechanism, which is convenient and quick. Since the threaded connection between the external threaded cylindrical section and the internal threaded circular hole section is inevitably loose, a smooth circular hole section is set above the internal threaded circular hole section in the axial blind hole, and the smooth circular hole section and the smooth cylindrical section are required to be clearance-fitted or transition-fitted, and the connecting adjustment mechanism is limited to reduce the risk of looseness between the external threaded cylindrical section and the internal threaded circular hole section, thereby ensuring the quality of the engineering tire vulcanization product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the partial cross-sectional view shown;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure of the enlarged view of part A shown;

[0020] Figure 4 for Figure 3 A structural schematic diagram of a partial cross-sectional view of another form of a connection adjustment mechanism is shown.

[0021] Markings in the figure: 1. Cylinder, 2. Piston, 3. Piston rod, 4. Cylinder body, 5. Connecting and adjusting mechanism, 6. Axial blind hole, 7. Smooth circular hole section, 8. Internally threaded circular hole section, 9. Adjusting column, 10. Connecting cylinder, 11. Smooth cylindrical section, 12. Externally threaded cylindrical section, 13. Connecting clamping column, 14. Circumferential annular groove, 15. Cooling device, 16. Cooling channel, 17. Cooling medium inlet, 18. Cooling medium outlet, 19. High temperature resistant dustproof sealing ring, 20. Waterproof sealing ring, 21. Oil-proof sealing ring, 22. Guide sealing ring, 23. Piston guide sealing ring, 24. Piston oil-proof sealing ring, 25. First oil inlet and outlet, 26. Second oil inlet and outlet, 27. First joint, 28. Second joint, 29. Outer cylinder, 30. Inner rod body, 31. Fixing bolt, 32. Pipeline. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. The methods used in the present utility model are conventional methods unless otherwise specified; the raw materials and devices used are conventional commercial products unless otherwise specified.

[0023] Embodiment 1:

[0024] Depend on Figure 1-Figure 3 As shown, the utility model provides a central mechanism for an engineering tire vulcanizer, the central mechanism is provided with a cylinder 1, the cylinder 1 is provided with a piston 2, a piston rod 3 and a cylinder body 4. The central mechanism is also provided with a connecting adjustment mechanism 5, the connecting adjustment mechanism 5 is connected to the end of the piston rod 3 of the cylinder 1 extending out of the cylinder body 4 through a thread;

[0025] An axial blind hole 6 is formed at one end of the piston rod 3 of the oil cylinder 1 extending out of the cylinder body 4. The inner side wall of the axial blind hole 6 is coaxially connected with a smooth circular hole section 7 and an internally threaded circular hole section 8 in sequence from top to bottom. The smooth circular hole section 7 is arranged near the opening of the axial blind hole 6.

[0026] The connecting adjustment mechanism 5 is connected from top to bottom with an adjusting column 9 and a connecting cylinder 10, and the connecting cylinder 10 is coaxially connected from top to bottom with a smooth cylindrical section 11 and an externally threaded cylindrical section 12; the externally threaded cylindrical section 12 and the internally threaded circular hole section 8 are connected by threaded adaptation, and the smooth cylindrical section 11 and the smooth circular hole section 7 are clearance-fitted or transition-fitted.

[0027] The working principle of the utility model is as follows: in the actual production process, on the same engineering tire vulcanizer, after completing the vulcanization of a batch of engineering tires of different specifications and models according to the production order arrangement, if the next batch of engineering tires with different cross-sectional widths is to be vulcanized, when disassembling and replacing the molds used for the engineering tires required by the order, it is not necessary to replace the entire central mechanism, but only the connecting adjustment mechanism 5 needs to be replaced, which is convenient and quick.

[0028] Among them, the difference between different connection adjustment mechanisms 5 lies in the different lengths of the adjustment column 9. The connection adjustment mechanisms 5 with different lengths of the adjustment column 9 are selected and replaced. That is, for the vulcanization production of engineering tires with a wide section, a connection adjustment mechanism 5 with a longer adjustment column 9 is selected; conversely, a connection adjustment mechanism 5 with a shorter adjustment column 9 is selected. At present, our company has developed various types of connection adjustment mechanisms 5, including long, medium and short ones.

[0029] The external thread cylindrical section 12 of the utility model is connected to the internal thread circular hole section 8 through threaded adaption, so as to realize the threaded connection between the adjusting mechanism 5 and the piston rod 3 of the oil cylinder 1 .

[0030] In actual production, the threaded connection between the external threaded cylindrical section 12 and the internal threaded circular hole section 8 may become loose due to factors such as insufficient connection force, wear or deformation after long-term use, and impact or vibration caused by external forces, which seriously affects the quality of engineering tire vulcanized products. Therefore, a smooth circular hole section 7 is provided in the axial blind hole 6, located above the internal threaded circular hole section 8, and the smooth circular hole section 7 is required to have a clearance fit or transition fit with the smooth cylindrical section 11, and the connection adjustment mechanism 5 is limited to improve the connection force between the threaded connection between the external threaded cylindrical section 12 and the internal threaded circular hole section 8, reduce the wear or deformation of the two, buffer the impact or vibration caused by external forces, and reduce the risk of looseness of the two. Even if there is looseness between the external threaded cylindrical section 12 and the internal threaded circular hole section 8, the clearance fit or transition fit between the smooth circular hole section 7 and the smooth cylindrical section 11 will also limit the left and right swing of the connection adjustment mechanism 5.

[0031] It should be noted that whether the smooth circular hole segment 7 and the smooth cylindrical segment 11 are clearance fit or transition fit depends on the actual situation of the connection adjustment mechanism 5 .

[0032] The connection adjustment mechanism 5 can also be provided with a connection clamping column 13, and the adjustment column 9 and the connection cylinder 10 are connected through the connection clamping column 13, and the three are coaxially connected and arranged in sequence from top to bottom; during the installation process, it is convenient for the operator to rotate the connection clamping column 13 to detachably fix the connection cylinder 10 in the axial blind hole 6 through threads; the connection clamping column 13 is rotatably clamped at the orifice of the axial blind hole 6, which is convenient for the positioning of the entire connection adjustment mechanism 5.

[0033] The adjusting column 9 may be provided with a circumferential annular groove 14. During the installation process, the operator fits the clamping ring into the circumferential annular groove 14 to position it with the upper chuck.

[0034] The central mechanism may also be provided with a cooling device 15, in which a cooling channel 16 is provided, and the cooling channel 16 is respectively connected with a cooling medium inlet 17 and a cooling medium outlet 18; the cooling device 15 is sealed and connected to the upper opening of the oil cylinder 1, and the piston rod 3 seals upward through the cooling device 15 and extends out. During use, cooling water is continuously introduced into the cooling channel 16 through the cooling medium inlet 17, and then the cooling water flows out from the cooling medium outlet 18, so that the seal between the piston rod 3 and the cooling device 15 is not heated, and the service life of the seal is effectively extended.

[0035] In order to further improve the sealing performance, on the one hand, the piston rod 3 and the cooling device 15 are sealed and connected in sequence from top to bottom with a high temperature dustproof seal ring 19, a waterproof seal ring 20, an oil-proof seal ring 21, and a guide seal ring 22, so that the piston rod 3 and the cooling device 15 have good dustproof, waterproof, oil-proof, and guiding performance. On the other hand, the piston 2 and the inner wall of the cylinder body 4 are sealed and connected in sequence from top to bottom with a piston guide seal ring 23 and a piston oil-proof seal ring 24, so that the piston 2 and the inner wall of the cylinder body 4 have good guiding and oil-proof performance.

[0036] Usually, the cylinder body 4 is connected with a first oil inlet and outlet 25 and a second oil inlet and outlet 26, the first oil inlet and outlet 25 is arranged above the piston 2, and the second oil inlet and outlet 26 is arranged below the piston 2; the first oil inlet and outlet 25 is connected with a first joint 27, and the second oil inlet and outlet 26 is connected with a second joint 28 through a pipeline 32. The hydraulic oil flows in or out of the first joint 27 and the second joint 28, so that the piston 2 drives the piston rod 3 to rise or fall.

[0037] Embodiment 2:

[0038] Embodiment 2 is improved on the basis of the technical solution of embodiment 1. Figure 4 As shown, the adjusting column 9 is composed of an outer cylinder 29 and an inner rod 30, and the inner rod 30 is sleeved in the outer cylinder 29 to form a two-section telescopic rod structure; the outer cylinder 29 is provided with a through hole, and a fixing bolt 31 passes through the through hole and is threadedly connected to the internal threaded hole to fix the internal rod 30 in the outer cylinder 29, wherein the internal rod 30 is provided with a plurality of internal threaded holes from top to bottom, and the fixing bolt 31 is threadedly connected to different internal threaded holes to adjust the length of the inner rod 30 extending out of the outer cylinder 29, thereby adjusting the length of the adjusting column 9 to meet the vulcanization production requirements of engineering tires with different cross-sectional widths.

[0039] In addition, the fixing bolt 31 can also be connected to the outer cylinder 29 through a threaded connection, and by rotating the fixing bolt 31, the head of the fixing bolt 31 is close to the surface of the inner rod 30, so that the inner rod 30 is fixed in the outer cylinder 29. In this way, the length of the inner rod 30 extending out of the outer cylinder 29 can also be adjusted, and the length of the adjustment column 9 can be adjusted to meet the vulcanization production requirements of engineering tires with different section widths.

[0040] It should be noted that the above two methods are only examples of the fixing bolt 31 passing through the outer cylinder 29 and detachably connected to the inner rod 30. The other technical contents of Example 2 are the same as those of Example 1 and will not be repeated here.

[0041] The utility model provides a central mechanism for an engineering tire vulcanizer, which realizes the threaded connection between the connecting and adjusting mechanism 5 and the piston rod 3 of the oil cylinder 1 through the threaded adapter connection setting between the external threaded cylindrical section 12 and the internal threaded circular hole section 8. When it is necessary to change the vulcanization production of engineering tires with different cross-sectional widths, the operator disassembles and replaces the mold used for the engineering tire required by the order, and does not need to replace the entire central mechanism, but only needs to replace the connecting and adjusting mechanism 5, which is convenient and quick. Since the threaded connection between the external threaded cylindrical section 12 and the internal threaded circular hole section 8 is inevitably loose, a smooth circular hole section 7 is set above the internal threaded circular hole section 8 in the axial blind hole 6, and the smooth circular hole section 7 is required to be clearance-matched or transition-matched with the smooth cylindrical section 11, and the connecting and adjusting mechanism 5 is limited, so as to reduce the risk of looseness between the external threaded cylindrical section 12 and the internal threaded circular hole section 8, and ensure the quality of the engineering tire vulcanization product.

[0042] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0043] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A central mechanism for an engineering tire vulcanizer, the central mechanism comprising a cylinder (1), the cylinder (1) comprising a piston (2), a piston rod (3) and a cylinder body (4), characterized in that: The central mechanism is further provided with a connection adjustment mechanism (5), and the connection adjustment mechanism (5) is connected to one end of the piston rod (3) of the oil cylinder (1) extending out of the cylinder body (4) through a threaded connection; An axial blind hole (6) is formed at one end of the piston rod (3) of the oil cylinder (1) extending out of the cylinder body (4); a smooth circular hole section (7) and an internally threaded circular hole section (8) are coaxially connected in sequence from top to bottom on the inner side wall of the axial blind hole (6); the smooth circular hole section (7) is arranged near the opening of the axial blind hole (6); The connection adjustment mechanism (5) is connected from top to bottom with an adjustment column (9) and a connection cylinder (10); the connection cylinder (10) is coaxially connected from top to bottom with a smooth cylindrical section (11) and an externally threaded cylindrical section (12); the externally threaded cylindrical section (12) is connected to the internally threaded circular hole section (8) via threaded adaption, and the smooth cylindrical section (11) and the smooth circular hole section (7) are clearance-fitted or transition-fitted.

2. The central mechanism for an engineering tire vulcanizer according to claim 1, characterized in that: The connection adjustment mechanism (5) is further provided with a connection clamping column (13), the adjustment column (9) and the connection cylinder (10) are connected via the connection clamping column (13), and the three are coaxially connected in sequence from top to bottom; the connection clamping column (13) is rotatably clamped at the orifice of the axial blind hole (6).

3. The central mechanism for an engineering tire vulcanizer according to claim 1, characterized in that: The adjusting column (9) is provided with a circumferential annular groove (14).

4. The central mechanism for an engineering tire vulcanizer according to claim 1, characterized in that: The central mechanism is also provided with a cooling device (15), wherein a cooling channel (16) is provided in the cooling device (15), and the cooling channel (16) is respectively connected to a cooling medium inlet (17) and a cooling medium outlet (18); the cooling device (15) is sealed and connected to an upper opening of the oil cylinder (1), and the piston rod (3) seals and passes through the cooling device (15) upward and extends out.

5. The center mechanism for an engineering tire vulcanizer according to claim 4, characterized in that: The piston rod (3) and the cooling device (15) are hermetically connected in sequence from top to bottom by a high-temperature resistant dustproof sealing ring (19), a waterproof sealing ring (20), an oil-proof sealing ring (21), and a guide sealing ring (22).

6. The center mechanism for an engineering tire vulcanizer according to claim 1, characterized in that: The piston (2) and the inner wall of the cylinder body (4) are sealed and connected in sequence from top to bottom, and a piston guide sealing ring (23) and a piston oil-proof sealing ring (24) are provided.

7. The center mechanism for an engineering tire vulcanizer according to claim 1, characterized in that: The cylinder body (4) is provided with a first oil inlet and outlet (25) and a second oil inlet and outlet (26), wherein the first oil inlet and outlet (25) is arranged above the piston (2), and the second oil inlet and outlet (26) is arranged below the piston (2); the first oil inlet and outlet (25) is provided with a first connector (27), and the second oil inlet and outlet (26) is provided with a second connector (28) via a pipeline (32).

8. A center mechanism for an engineering tire vulcanizer according to any one of claims 1 to 7, characterized in that: The adjusting column (9) is composed of an outer cylinder (29) and an inner rod (30); the inner rod (30) is sleeved inside the outer cylinder (29) to form a two-section telescopic rod structure; a fixing bolt (31) passes through the outer cylinder (29) and is detachably connected to the inner rod (30).

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