Mechanical forming drum capable of realizing double-inch-level switching and avoiding sidewall folding

Abstract

The utility model relates to the field of tire manufacturing, in particular to a mechanical forming drum capable of realizing double-inch-level switching and avoiding sidewall folding. The anti-package rod assembly further comprises a safety plate, the safety plate is arranged at the rear end of the air cylinder sliding sleeve, a plurality of base plates are detachably arranged on the safety plate, and the base plates correspond to the anti-package rods in a one-to-one mode. The locking block assembly comprises an air cylinder body arranged at the front end of the air cylinder sliding sleeve, a piston, a connecting rod, a supporting block and a locking block. The locking block is detachably arranged at the top end of the supporting block, and a pre-lifting mechanism used for lifting up the turn-up roller is arranged at the bottom of one side of the locking block; and the vertical distance between the vertex of the turn-up roller and the edge of the inner ring of the steel ring is 0-10mm. According to the utility model, the process is greatly optimized, the time cost is reduced by about 80% compared with the labor cost through estimation, the operation efficiency is obviously improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tire manufacturing, specifically to a mechanically formed drum that can achieve dual-inch switching and avoid tire sidewall folding. Background Technology

[0002] In the current manufacturing process of semi-steel and all-steel truck tires, the mechanical forming drums assembled in tire forming machines are mainly used for bonding and wrapping the inner liner to the sidewall rubber. Currently, the most commonly used tire forming machine is the three-drum forming machine.

[0003] However, most existing three-drum tire forming machines on the market have this problem: each tire size requires a specific mechanical forming drum. If there's a need to change the tire size, the forming drum must be changed. This process is extremely cumbersome, consuming a lot of time and manpower, resulting in high time and labor costs.

[0004] Furthermore, when the locking block moves radially, the radial distance between the reverse roller and the locking block of the traditional three-drum forming machine gradually increases. The larger this distance is, the more likely the tire sidewall will fold, which directly affects the tire carcass reverse wrapping and the quality of the tire blank after forming. Utility Model Content

[0005] This invention provides a mechanical forming drum that can achieve dual-inch switching and avoid tire sidewall creases. Its purpose is to solve the problems of existing three-drum forming machines being unable to switch inches and having severe tire sidewall creases by replacing the adjusting pads on the locking block and safety plate and setting a pre-lifting mechanism.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] This utility model provides a mechanical forming drum that can achieve dual-inch switching and avoid tire sidewall folding. It includes a main shaft assembly, two sets of locking block assemblies and two sets of anti-wrapping rod assemblies sleeved on the outer periphery of the main shaft assembly. The two sets of locking block assemblies and the two sets of anti-wrapping rod assemblies are symmetrically arranged about the vertical center line of the main shaft assembly. The main shaft assembly includes a main shaft, a flange disposed at one end of the main shaft, and left and right rotary ball screws. The anti-wrapping rod assembly includes a cylinder sliding sleeve, a cylinder body, and several anti-wrapping rods evenly arranged along the outer circumference of the main shaft. Anti-wrapping rollers are provided at the front ends of the anti-wrapping rods.

[0008] The anti-wrapping rod assembly also includes a safety plate, which is disposed at the rear end of the cylinder sliding sleeve. Several pads are detachably disposed on the safety plate, and each pad corresponds to one of the anti-wrapping rods.

[0009] The lock block assembly comprises a cylinder body arranged at the front end of the cylinder sliding sleeve, a piston, a connecting rod, a supporting block and a lock block; the cylinder body is internally provided with a gas chamber and a vertical movable cavity, the piston is arranged in the gas chamber, the supporting block is arranged in the vertical movable cavity and can move up and down, one end of the connecting rod is rotatably connected with the supporting block through a pin shaft I, and the other end is rotatably connected with the piston through a pin shaft II; the lock block is detachably arranged at the top end of the supporting block, a pre-lifting mechanism for lifting the reverse wrapping roller is arranged at the bottom of one side of the lock block; the vertical distance between the top of the reverse wrapping roller and the edge of the inner ring of the steel ring is 0-10mm.

[0010] Further, the main shaft assembly is mounted on the main transmission shaft of the forming machine box through the flanges at the ends.

[0011] Further, the rear end of the reverse wrapping rod is arranged at the rear end of the cylinder body, and the left and right rotating roller shaft screws are connected to the rear end of the cylinder sliding sleeve through pin shafts and keys.

[0012] Further, the backing plate is detachably connected with the safety plate through bolts.

[0013] Further, the distance between the rear end of the reverse wrapping rod and the backing plate is 0.5mm after the lock block is completely lifted.

[0014] Further, the lock block is detachably arranged at the top of the supporting block through bolts.

[0015] Further, the bottom of the lock block is provided with a protrusion, and the top of the supporting block is provided with a clamping groove matched with the protrusion.

[0016] Further, the top of the lock block is provided with a recess.

[0017] Further, the cutting surface of the pre-lifting mechanism has an arc of 110-120 degrees.

[0018] The beneficial effects achieved by the utility model are as follows:

[0019] The utility model provides a more efficient and convenient inch-level switching mode, only needs to replace the adjusting pad on the lock block and the safety plate, and can easily complete the inch-level switching operation. This innovative design completely changes the traditional mode of "one drum one inch level". In the traditional mode, the inch-level replacement process is complicated, and a lot of manpower and time cost are needed. However, the application of the utility model greatly optimizes this process, and it is estimated that the time and manpower cost are reduced by about 80% compared with before, the operation efficiency is significantly improved, and the production cost is reduced.

[0020] In addition, the utility model reduces the kind of mechanical forming drum, this not only makes the management work more simple and convenient, effectively reduces the management difficulty and error probability, still reduces the occupation of storage space, is favorable for enterprise optimization warehouse layout, improves space utilization.

[0021] It is worth mentioning that the utility model successfully solves the tire side folding problem in the double-inch level switching process by the ingenious pre-lifting mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in embodiment or prior art description, obviously, the drawings in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, other drawings can also be obtained according to the structure shown in these drawings.

[0023] Figure 1 It is the lock block of 20-inch mechanical forming drum in the rising state section view.

[0024] Figure 2 It is the lock block of 20-inch mechanical forming drum in the falling state section view.

[0025] Figure 3 It is the lock block of 22.5-inch mechanical forming drum in the rising state section view.

[0026] Figure 4 It is Figure 3 The A part enlarged schematic view in it, M indicates the vertical distance between the upper surface of pre-lifting mechanism and the edge of steel ring inner circle, and N indicates the vertical distance between the vertex of wrapping roller and the edge of steel ring inner circle.

[0027] Figure 5 It is the B part enlarged schematic view in Figure 3 .

[0028] Figure 6 It is the lock block of 22.5-inch mechanical forming drum in the falling state section view.

[0029] Figure 7 It is the lock block section view of 20-inch mechanical forming drum.

[0030] Figure 8 It is the lock block section view of 22.5-inch mechanical forming drum.

[0031] Figure 9 It is the lock block section view of 22.5-inch mechanical forming drum when lock block and wrapping rod completely fall back.

[0032] Figure 10 Figure 2 is a partial position relation diagram of a 20-inch mechanical forming drum (without pre-lifting device) with lock block in the raised state; in the figure, H1 represents the vertical distance between the apex of the turn-up roller and the edge of the inner ring of the bead; D1 represents the position where the carcass barrel is prone to side fold.

[0033] Figure 11 Figure 3 is a partial position relation diagram of a 22.5-inch mechanical forming drum (without pre-lifting device) with lock block in the raised state; in the figure, H2 represents the vertical distance between the apex of the turn-up roller and the edge of the inner ring of the bead; D2 represents the position where the carcass barrel is prone to side fold.

[0034] In the figure, 100, main shaft assembly; 110, main shaft; 120, flange plate; 130, left and right rotating roller screw; 200, lock block assembly; 210, lock block; 211, groove; 212, protrusion; 213, pre-lifting mechanism; 220, support block; 230, connecting rod; 231, pin shaft one; 232, pin shaft two; 240, piston; 250, cylinder body; 251, air chamber; 252, vertical movable cavity; 300, turn-up lever assembly; 310, cylinder sliding sleeve; 320, cylinder body; 330, turn-up lever; 331, turn-up roller; 340, safety plate; 341, pad plate; 400, bead; 500, carcass barrel. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] It should be noted that if the present application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0038] The utility model provides a kind of mechanical forming drum that can realize two-inch level switching and avoid tire side folding, improve existing mechanical forming drum;Solve the problem that the more specification types of mechanical forming drum in prior art lead to time-consuming and laborious replacement, also solve the problem that existing mechanical forming drum is prone to tire side folding, especially solve the problem that tire side folding is serious when two-inch level switching;The utility model realizes that only replacement adjustment pad on lock block 210 and safety plate 340 can complete inch level switching, can be switched from a smaller inch level to larger inch level, and avoid the problem of tire side folding in making tire, and the estimated time and labor cost are reduced by 80%.

[0039] As shown in Figures 1-11 The utility model discloses a main shaft assembly 100, two groups of lock block assemblies 200 and two groups of reverse wrapping rod assemblies 300 are arranged on the outer circumferential side of the main shaft assembly 100, and the two groups of lock block assemblies 200 and the two groups of reverse wrapping rod assemblies 300 are symmetrically arranged with the vertical center line of the main shaft assembly 100.

[0040] The main shaft assembly 100 includes a main shaft 110, a flange plate 120 arranged at one end of the main shaft 110 and a left-right rotating roller screw 130, the main shaft 110 is hollow, and the left-right rotating roller screw 130 is arranged along the axis of the main shaft 110;Two groups of the lock block assembly 200 and two groups of the reverse wrapping rod assembly 300 are arranged on the outer circumferential side of the main shaft 110;The main shaft assembly 100 is installed on the main transmission shaft of the forming machine box through the flange plate 120 at the end.

[0041] The reverse wrapping rod assembly 300 comprises a cylinder sliding sleeve 310, a cylinder body 320 and a plurality of reverse wrapping rods 330 evenly arranged along the outer circumference of the main shaft 110.

[0042] The innovation of the utility model lies in that:

[0043] The mechanical forming drum rotates at high speed around the shaft in the working process, and the centrifugal force can cause the reverse wrapping rod 330 to swing. Therefore, in order to reduce or avoid swinging, the reverse wrapping rod assembly 300 further comprises a safety plate 340, the safety plate 340 is arranged at the rear end of the cylinder sliding sleeve 310, and the safety plate 340 moves along with the cylinder sliding sleeve 310; a plurality of base plates 341 are detachably arranged on the safety plate 340, and the base plates 341 correspond to the reverse wrapping rods 330 one by one. The base plate 341 is used for limiting the reverse wrapping rod 330, so as to achieve the purpose of reducing or avoiding swinging.

[0044] Further, the base plate 341 is detachably connected with the safety plate 340 through bolts. When the size level is switched, the base plate needs to be replaced according to the actual situation.

[0045] However, due to machining errors and deformation caused by long-term use, the base plate 341 cannot completely fit the rear end of the reverse wrapping rod 330; specifically, after the following lock block 210 is completely lifted, the distance between the rear end of the reverse wrapping rod 330 and the base plate 341 is about 0.5mm, which is not completely locked.

[0046] The lock block assembly 200 comprises a cylinder body 250 arranged at the front end of the cylinder sliding sleeve 310, a piston 240, a connecting rod 230, a support block 220 and a lock block 210; the cylinder body 250 is provided with a gas chamber 251 and a vertical movable cavity 252, and the gas chamber 251 and the vertical movable cavity 252 form an L-shaped cavity; the piston 240 is arranged in the gas chamber 251 and can move forward and backward by injecting or extracting air in the gas chamber 251; the support block 220 is arranged in the vertical movable cavity 252 and can move up and down; one end of the connecting rod 230 is rotatably connected with the support block 220 through a pin shaft one 231, and the other end is rotatably connected with the piston 240 through a pin shaft two 232; the lock block 210 is detachably arranged at the top end of the support block 220, and one side of the bottom of the lock block 210 is provided with a pre-lifting mechanism 213 for lifting the reverse wrapping roller 331. Switching the size level of the mechanical forming drum is realized by replacing the lock block 210 of different sizes.

[0047] The pre-lifting mechanism 213 is used to lift the turn-up roller 331, so that the vertical distance between the top of the turn-up roller 331 and the inner rim of the bead ring 400 is kept within a small range, solving the problem of tire side folding.

[0048] Further, the lock block 210 is detachably arranged on the top of the support block 220 by means of a bolt.

[0049] Further, the bottom of the lock block 210 is provided with a protrusion 212, and the top of the support block 220 is provided with a clamping groove matched with the protrusion 212, facilitating fixation. In addition, the top of the lock block 210 is provided with a recess 211, facilitating fixation of the bead ring 400.

[0050] Further, the cutting surface of the pre-lifting mechanism 213 has an arc of 110-120 degrees.

[0051] Further, in order to solve the problem of tire side folding to the greatest extent, it is necessary to adjust the height of the pre-lifting mechanism 213; that is, it is necessary to adjust the vertical distance between the upper surface of the pre-lifting mechanism 213 and the inner rim of the bead ring 400, so as to ensure that the vertical distance between the top of the turn-up roller 331 and the inner rim of the bead ring 400 is 0-10 mm.

[0052] Under the action of compressed air, the piston 240 moves in the cylinder body 250 towards the turn-up rod 330. Since the length of the connecting rod 230 is fixed and is respectively connected with the piston 240 and the support block 220, the support block 220 is pushed upwards by the connecting rod 230, lifting the lock block 210, so as to lock the bead ring 400. When the lock block 210 is moved upwards to the limit position, it is in the lifted state of the mechanical forming drum lock block 210, and when the lock block 210 is moved downwards to the limit position, it is in the falling state of the mechanical forming drum lock block 210.

[0053] The key point of the two-inch level switching is the lock block 210, which is replaced to achieve the purpose of switching between two-inch levels by the same mechanical forming drum. First, it is necessary to determine that a certain type of mechanical forming drum needs to be switched between two-inch levels, so as to make detailed adjustment to the mechanical forming drum itself.

[0054] Specifically, the following will take the 20-inch mechanical forming drum which can be switched between 20-inch and 22.5-inch as an example to explain the details of the two-inch level switching.

[0055] Specifically, according to the 20-inch tire building process parameters and the 22.5-inch tire building process parameters, the relative position of the pin shaft 231 and the support block 220 is adjusted, so that the stroke of the support block 220 can meet the requirements of 20-inch and 22.5-inch tire building at the same time. Further, according to the process requirements, the locking block 210 suitable for 20-inch and 22.5-inch respectively is made. After the transformation, the 20-inch mechanical forming drum can make the two types of locking blocks 210 reach the ideal lifting and falling height. By replacing the locking block 210, the switching of different inch-level products can be realized.

[0056] The problem of inch-level replacement is solved, and another problem is that the tire side is folded. There are two main reasons for the tire side folding, which are the axial and radial distance between the wrapping roller 331 and the locking block 210. The smaller the distance between the two, the less likely it is to occur. The adjustment of the axial distance is relatively simple, and this paper will not repeat it. The problem discussed in this paper is how to reduce the radial distance, so the utility model is provided with a pre-lifting mechanism 213 on the bottom of one side of the locking block 210 for lifting the wrapping roller 331, so that when the locking block 210 moves radially, it can drive the wrapping roller 331 to move radially at the same time to reduce the radial distance between the two.

[0057] In the case of adding a 20-inch locking block 210, when the air chamber 251 is not inflated, the 20-inch locking block 210 is in the falling state, the pre-lifting device does not work, and the wrapping rod 330 is also in the falling state. When the air chamber 251 is inflated, the piston 240 drives the pin shaft two 232--connecting rod 230-pin shaft one 231-support block 220-20-inch locking block 210 to move radially, the 20-inch locking block 210 locks the 20-inch steel ring 400, the locking block 210 is lifted, and at the same time, the pre-lifting device of the 20-inch locking block 210 drives the wrapping roller 331 to move radially, and the wrapping rod 330 realizes the pre-lifting action, so that the distance between the locking block 210 and the wrapping roller 331 after the radial movement is greatly shortened. In order to produce a relatively, Figure 10 The height difference H1 of the 20-inch locking block 210 without adding the pre-lifting device and the position D1 of the carcass barrel 500 where the tire side is easy to fold are shown.

[0058] In the case of adding a 22.5-inch locking block 210, the action is exactly the same as adding a 20-inch locking block 210.

[0059] But it is worth noting that in the test, if the same scheme as 20 inches, that is, the lock block 210 back after the lock block 210 and the back-up rod 330 can be in the back; then when the lock block 210 is raised, it can be found that the effect of the pre-lifting device is poor, and the ideal shortening distance effect cannot be achieved. Therefore, the height of the 22.5-inch lock block 210 pre-lifting mechanism 213 needs to be raised, that is, the vertical distance between the upper surface of the pre-lifting mechanism 213 and the inner edge of the steel ring 400 is adjusted, and the distance of the 22.5-inch lock block 210 and the back-up roller 331 after the radial movement of the lock block 210 is limited.

[0060] But such design, when the lock block 210 back, 22.5-inch lock block 210 back to the state, the back-up rod 330 cannot return to the back state, that is, the back-up rod 330 and the main shaft 110 axis still exists a certain angle Figure 9 Showed that after the back-up rod 330 completely back, the back-up roller 331 will partially coincide with the pre-lifting mechanism 213); but after use, it is found that this state does not affect the tire making, so it can not only avoid the tire side folding, but also does not affect the tire making effect; therefore, the height of the pre-lifting mechanism 213 is finally determined to be raised, so that the vertical distance between the vertex of the back-up roller 331 and the inner edge of the steel ring 400 is 0-10mm. In order to produce a comparison, Figure 11 Showed that the 22.5-inch lock block 210 did not increase the height difference H2 of the pre-lifting device and the position D2 of the tire body barrel 500 prone to tire side folding.

[0061] The back-up rolling process steps of the utility model are as follows:

[0062] 1) After completing the tire body cord lamination and steel wire ring positioning, drive the left and right rotating roller screw 130, drive the air cylinder sliding sleeve 310 and the lock block 210 to move to the middle to the set position.

[0063] 2) Compressed air is introduced into the air chamber 251 to push the piston 240 and the lock block 210 to rise, and the tire body is fastened and sealed. At the same time, under the action of the pre-lifting mechanism 213, the back-up roller 331 rises synchronously with the lock block 210 and is always kept at the root of the tire side.

[0064] 3) Compressed air is introduced into the tire body cavity through the air pipe, and the tire body is shaped.

[0065] 4) Compressed air is introduced into the front end of the cylinder body 320 through the air pipe, which drives the entire cylinder body 320 to move forward along the cylinder sliding sleeve 310, pulls the back-up rod 330 to move forward, and the back-up roller 331 rises along the tire side, completing the back-up and rolling of the tire side.

[0066] 5) After the turning-up and rolling operations are completed, the air supply line supplies compressed air to the rear end of the cylinder body 320, so that the cylinder body 320 moves rearward along the cylinder sliding sleeve 310, pulls the turning-up rod 330 to move rearward and tighten to the initial position, and prepares for the next tire body ply bonding process.

[0067] The above is only optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A mechanical forming drum capable of achieving double-inch level switching and avoiding tire sidewall folding, comprising a main shaft assembly (100), two sets of lock block assemblies (200) and two sets of turn-up rod assemblies (300) arranged on the peripheral side of the main shaft assembly (100) in a sleeved manner, the two sets of lock block assemblies (200) and the two sets of turn-up rod assemblies (300) being symmetrically arranged about the vertical center line of the main shaft assembly (100); the main shaft assembly (100) comprises a main shaft (110), a flange plate (120) arranged at one end of the main shaft (110), and left and right rotating roller screw shafts (130); the turn-up rod assembly (300) comprises a cylinder sliding sleeve (310), a cylinder body (320), and a plurality of turn-up rods (330) uniformly arranged along the outer circumference of the main shaft (110), the front end of each turn-up rod (330) being provided with a turn-up roller (331); characterized in that: the turn-up rod assembly (300) further comprises a safety plate (340) arranged at the rear end of the cylinder sliding sleeve (310), a plurality of spacer plates (341) being detachably arranged on the safety plate (340), the spacer plates (341) corresponding one-to-one to the turn-up rods (330); the lock block assembly (200) comprises a cylinder body (250) arranged at the front end of the cylinder sliding sleeve (310), a piston (240), a connecting rod (230), a support block (220), and a lock block (210); the cylinder body (250) is provided with a gas chamber (251) and a vertical movable cavity (252), the piston (240) being arranged in the gas chamber (251) and being movable forward and backward, the support block (220) being arranged in the vertical movable cavity (252) and being movable upward and downward, one end of the connecting rod (230) being rotatably connected to the support block (220) through a pin shaft I (231), the other end of the connecting rod (230) being rotatably connected to the piston (240) through a pin shaft II (232), the lock block (210) being detachably arranged at the top end of the support block (220), one side of the bottom of the lock block (210) being provided with a pre-lifting mechanism (213) for lifting the turn-up roller (331), the vertical distance between the vertex of the turn-up roller (331) and the inner edge of the rim (400) being 0-10 mm.

2. The mechanical forming drum capable of achieving double inch level switching and avoiding sidewall folding according to claim 1, characterized in that: The main shaft assembly (100) is installed on the main transmission shaft of the forming machine box through the flange plate (120) at the end.

3. The mechanical forming drum capable of achieving double inch level switching and avoiding sidewall folding of claim 1, wherein: The rear end of the turn-up rod (330) is arranged at the rear end of the cylinder body (320), and the left and right rotating roller screw shafts (130) are connected to the rear end of the cylinder sliding sleeve (310) through a pin shaft and a key.

4. The mechanical forming drum of claim 1, wherein: The spacer plates (341) are detachably connected to the safety plate (340) through bolts.

5. The mechanical forming drum of claim 1, wherein: After the lock block (210) is completely lifted, the distance between the rear end of the turn-up rod (330) and the spacer plate (341) is 0.5 mm.

6. The mechanical forming drum of claim 1, wherein: The lock block (210) is detachably arranged at the top of the support block (220) through bolts.

7. The mechanical forming drum of claim 1, wherein: The bottom of the lock block (210) is provided with a protrusion (212), and the top of the support block (220) is provided with a clamping groove matched with the protrusion (212).

8. The mechanical forming drum of claim 1, wherein: The top of the lock block (210) is provided with a groove (211).

9. The mechanical forming drum of claim 1, wherein: The cutting surface of the pre-lifting mechanism (213) has an arc of 110-120 degrees.

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