CN216032669U - Drum plate rotation driving mechanism of forming machine laminating drum - Google Patents

Abstract

The utility model relates to a drum plate rotation driving mechanism of a forming machine laminating drum, which comprises a plurality of drum plates surrounding the outer side of a tire body drum, wherein the whole drum plates form a cylinder shape on the outer side of the tire body drum; the outer ring surface of the outer sleeve is provided with a compressed gas input port, the inner side of the outer sleeve forms a plurality of ring gas grooves along the length extension direction of the outer sleeve, and the compressed gas input port penetrates through the ring gas grooves; a plurality of round holes are uniformly distributed on the outer ring surface of the inner sleeve, a plurality of inner side ring air grooves are formed in the inner side of the inner sleeve along the length extension direction of the inner side ring air grooves, and the round holes are penetrated through the inner side ring air grooves.

Description

Drum plate rotation driving mechanism of forming machine laminating drum

Technical Field

The utility model relates to the technical field of tire molding, in particular to a drum plate rotation driving mechanism.

Background

The tyre body drum is a device for manufacturing a semi-finished product of a tyre body by using a belt-shaped and sheet-shaped sizing material and a tyre bead, the internal transmission form of the existing tyre body drum case is complex, a single motor is adopted to drive the rotation of the tyre body drum and the expansion and contraction of a drum plate to be two steps, the rotation of the drum body and the expansion and contraction of the drum plate are two independent steps which are difficult to control by only one clutch, the drum body rotates when the clutch is closed, a lead screw in the drum body rotates to drive a ball slide block connected with the drum plate to slide and open the drum plate when the clutch is disconnected, the two steps can not be carried out simultaneously, the time wasted by the back and forth exchange steps of closing and disconnecting the clutch reduces the production efficiency, the stress of the ball screw and the nut in the inner part is enhanced when the drum plate is opened, the probability of breakage of the lead screw, the nut and the slide block is improved, the failure rate of a machine is greatly improved, the tyre bead can not be automatically preset by manpower when the tyre bead product is manufactured, time is wasted and the yield of the produced tires is affected.

Disclosure of Invention

The utility model provides a drum plate rotation driving mechanism which has simple structure, saves manufacturing time and improves the yield of tires, and the mechanism comprises:

a plurality of drum plates surrounding the outer side of the carcass drum, the whole drum plates form a cylinder shape on the outer side of the carcass drum, the front side and the rear side of each drum plate are respectively provided with a front limiting piece and a rear limiting piece so as to limit the longitudinal displacement of the drum plates, the drum plates are connected with a second push rod,

rotary driving mechanism, including second servo motor, rotate the gear of being connected, with second servo motor and rotate the driven rotation wheel of gear engagement, it has a rack section and one to continue to form the smooth section in two free sides in rack section to rotate the circumference of wheel, rack section and pinion engagement cooperation are in order to drive the rotation of rotating the wheel, the partition region that forms between smooth section and the rack section prevents to rotate the wheel rotatory, rotate wheel and first push rod normal running fit, first push rod is connected with the second push rod

The rotary pneumatic sealing mechanism comprises a hollow main shaft fixedly sleeved outside the first push rod, an inner sleeve sleeved on the hollow main shaft, an outer sleeve sleeved on the inner sleeve, an end sleeve fixed at the front end of the outer sleeve and a stop plate fixed with the end sleeve;

the outer ring surface of the outer sleeve is provided with a compressed gas input port, the inner side of the outer sleeve forms a plurality of ring gas grooves along the length extension direction of the outer sleeve, and the compressed gas input port penetrates through the ring gas grooves;

a plurality of round holes are uniformly distributed on the outer ring surface of the inner sleeve, a plurality of inner side ring air grooves are formed in the inner side of the inner sleeve along the length extension direction of the inner side ring air grooves, and the round holes are penetrated through the inner side ring air grooves;

the front side and the rear side of the annular gas groove on the inner side of the inner sleeve and the annular gas groove of the outer sleeve are respectively provided with a sealing ring

A plurality of air holes are spirally distributed on the hollow main shaft to provide required compressed air for the drum plate when a product is manufactured;

the inner side ring air groove of the inner sleeve corresponds to a plurality of air holes of the hollow main shaft, and the inner side ring air groove of the outer sleeve corresponds to a round hole on the outer ring surface of the inner sleeve.

Preferably, the outer sleeve comprises 3 outer sleeve units sleeved outside the inner sleeve, the end sleeve connects the 3 outer sleeve units together in a penetrating manner through 4 long bolts, and 2 bolts are fixed on the stop plate to prevent the inner sleeve, the outer sleeve and the end sleeve from rotating along with the hollow main shaft.

Preferably, the hollow spindle is engaged with the carcass drum by means of a flange with keys and screws.

Preferably, 6 radial air passages are arranged in the hollow main shaft and penetrate through 6 air holes in the outer ring surface, the air passages are symmetrically distributed along the axis, and the air passages are independently controlled to finish required actions.

Preferably, the left end of the hollow main shaft is fixed on the bearing outer ring by a screw, and the bearing inner ring is fixed on the frame by a screw.

Compared with the prior art, the utility model has the advantages that:

1. the utility model changes the original single-motor clutch control into the single-motor control of the double first servo motors, and effectively solves the problem that the two steps are not interfered with each other.

2. The original ball screw type is changed into the special push rod sliding block type, so that the damage rate is effectively reduced, and the subsequent maintenance cost and the maintenance difficulty are reduced.

3. The utility model changes the original manual preset of the tire side or fixed and single preset into automatic adjustable preset, has simple and small structure, is suitable for various models, reduces the manual labor intensity and saves the precious space on the tire body drum.

4. The spiral push rod mechanism is adopted to replace the original complex mechanism, so that the manufacturing time of the tire body can be greatly shortened, the failure rate is reduced, and the tire yield is improved.

5. The utility model changes the original complex single carcass case and carcass drum into the carcass case and carcass drum with simple structure and multiple functions, thereby effectively reducing the occurrence of failure rate, improving the tire yield and obtaining greater economic benefit.

Drawings

FIG. 1 is a cross-sectional view of the overall structure of the present invention;

FIG. 2 is a top plan view of the overall structure of the present invention;

FIG. 3 is a left side view of the overall structure of the present invention;

FIG. 4 is a schematic view of the present rotary seal pneumatic configuration;

in the figure: 1. the tire bead pre-setting device comprises a push rod transmission mechanism, 2, a rotary seal pneumatic mechanism, 3, an inner tire bead pre-setting mechanism, 4, a spiral push rod mechanism, 5, a drum plate positioning plate, 6, a tire body drum plate, 7, a screw, 8, a second push rod, 9 and a drum body main shaft; 10. m14 bolt, 11, hollow main shaft flange plate, 12, positioning sleeve, 13, damping ring, 14, slide block, 15, conical slide block seat, 16, gasket, 17, spring, 18, round nut, 19 and pressure adjusting device; 20. a press block 21, a press block positioning sleeve 22, a sleeve 23, a press cover 24, a box body 25, an outer sleeve 26, a sealing ring 27, an inner sleeve 28, a hollow main shaft 29, a stop plate 30, an end sleeve 31, a long bolt 32, a expanding claw 33, a rotating plate 34, a fixing plate 35, a connecting plate 36, a guide rail 37, an L-shaped expansion plate 38, an upper air cylinder 39, a lower air cylinder 40, an upper guide rod 41, a buffer pad 42, a top screw 43, an adjusting seat 44, a lower guide rod 45, a linear bearing 46, a first push rod 47, a first screw rod 48, a pushing disk 49, an L-shaped adjusting block base 50, a synchronous belt 51, a left support bearing 52, a clamping double nut 53, a second screw rod 54, a right support bearing 55, a trapezoidal nut 56, a first synchronous belt wheel 57, a cabinet bottom plate 58, a second synchronous belt 59, an output synchronous belt wheel, 60. the device comprises an expansion and contraction motor base plate 61, an expansion and contraction speed reducer 62, an expansion and contraction motor 63, a second servo motor 64, a rotary speed reducer 65 and gears; 66. and rotating the wheel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "longitudinal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Adopt single motor to drive two steps of the rotation of matrix drum and the strutting of drum plate among the prior art, however adopt single motor to be difficult to realize that two steps go on simultaneously, the clutch actuation makes a round trip to change the step waste time reduction production efficiency with the disconnection simultaneously. In addition, when the drum plate is spread, the ball screw in the case is difficult to rotate and control, so that the probability of damage to the sliding block is caused in the maximum force of the ball sliding block, and the failure rate of the machine is greatly improved.

Based on the above, referring to fig. 1-4, the present embodiment aims to provide a bonding drum chassis of an all-steel forming machine, the drum chassis comprises a frame, an inner bead presetting mechanism 3 arranged on the frame, and a plurality of drum plates 6 surrounding the outer side of a carcass drum, the plurality of drum plates are integrally cylindrical on the outer side of the carcass drum, a front stopper 12 and a rear stopper 5 are respectively arranged on the front side and the rear side of each drum plate to limit the longitudinal displacement of the drum plate 6, and the drum plates 6 need to realize independent rotation or expansion action under the action of a driving mechanism;

in order to achieve the above object, the present invention provides a dual servo driving mechanism, specifically, referring to fig. 1, the dual servo driving mechanism includes a spiral push rod mechanism 4 and a push rod transmission mechanism, which are used for independently driving the drum plate to perform the opening action, specifically:

the spiral push rod mechanism 4 is arranged on the front side of the frame, and comprises a first servo motor 62, a synchronous belt pulley set in driving connection with the first servo motor 62, a screw rod power transmission mechanism in driving connection with the synchronous belt pulley set, and a first push rod 46 connected with the screw rod transmission mechanism, please refer to fig. 3, the synchronous belt pulley set comprises an output synchronous pulley 59 in driving connection with the first servo motor 62, and a first synchronous wheel 56 and a second synchronous wheel 58 in driving connection with the output synchronous pulley 59, the first synchronous wheel 56 and the second synchronous wheel 58 are in driving connection through a synchronous belt, the screw rod transmission mechanism comprises a first screw rod 47 in driving connection with the first synchronous wheel 56, a second screw rod 53 in driving connection with the second synchronous pulley 58, and a push disc 48 in threaded fit with the first screw rod 47 and the second screw rod 53, the first screw rod 47 and the second screw rod 53 are arranged on the left side and the right side of the frame of the drum box machine in parallel, the middle position of the push disc 48 is fixedly connected with the first push rod 46 to drive the first push rod 46 to longitudinally displace, in the embodiment, the work of the first servo motor drives the synchronous pulley set to transmit, and the screw rod and the push disc obtain power from the synchronous pulley set to finally push the first push rod to move forwards; the spiral push rod mechanism drives the left screw rod and the right screw rod to rotate by the left synchronous belt pulley and the right synchronous belt pulley, and the two trapezoidal nuts synchronously push and pull the push disc to ensure the linear motion of the first push rod in the case; compared with the original complex mechanism, the spiral push rod mechanism provided by the embodiment can greatly shorten the manufacturing time of the tire body, reduce the failure occurrence rate and improve the tire yield.

The push rod transmission mechanism comprises a second push rod 8 arranged in the drum body, an elastic resetting piece 17 used for resetting the second push rod 8 and a positioning plate 5 used for limiting the forward movement of the drum plate, the second push rod 8 is fixedly connected with the first push rod 46 so as to generate longitudinal displacement under the guidance of the first push rod 46, and an inclined guide rail in sliding fit with the second push rod is formed in the drum plate 6 so that the drum plate generates radial displacement, namely opening movement, under the guidance of the second push rod; in the embodiment, the second push rod 8 is in inclined sliding fit with the drum plate, and the positioning plate 5 is adopted to limit the forward movement of the drum plate, so that the forward movement of the second push rod 8 can be easily converted into the expanding movement of the drum plate 6, namely the expanding movement of the drum plate is realized by adopting the independent first servo motor;

the movement method for propping the drum plate open in the push rod sliding block mechanism adopts a sliding block and sliding rail type, so that the occurrence of failure rate is greatly reduced, and the subsequent maintenance cost and the maintenance difficulty are reduced; in the carcass drum push rod slider mechanism, the first push rod 46 in the machine box pushes against the second push rod 8 in the drum body, and the second push rod 8 in the drum body is skillfully matched with the spring of the elastic reset piece 17, so that the contraction time of the drum plate 6 is greatly saved.

In a preferred embodiment, the front side and the rear side of the drum plate are both formed with inclined guide rails inclined toward the lower side, the front side and the rear side of the second push rod 8 are respectively formed with tapered slider seats 15, the two tapered slider seats are integrally formed, and sliders 14 slidably engaged with the inclined guide rails are fixedly arranged on the two tapered slider seats, that is, the tapered slider seats on the left and right sides are integrally formed, and inclined sliders engaged with the inclined guide rails are fixedly arranged on the outer inclined surfaces of the tapered slider seats, and are slidably engaged with the inclined guide rails; in this embodiment, the slider 14 is secured to the tapered slider holder 15 using 4M 6 screws.

Optionally, the elastic reset piece 17 is a spring, one end of the spring 17 abuts against the second push rod 8, the other end of the spring abuts against the spring pressing block 20 to adjust the elastic force of the spring, the spring and the spring pressing block ensure that the second push rod slowly moves forwards, and the elastic reset piece and the spring pressing block are also adopted to ensure that the plurality of drum plates are slowly and outwards opened.

When the second push rod 8 is not stressed, the spring 17 rebounds to push the second push rod 8 back to the initial position to the left, the elastic force of the spring 17 is controlled by the pressing amount of the right spring pressing block 20, and the minimum element of the drum plate 6 is influenced by the relative position of the slider 14 and the drum plate 6 and the length of the positioning sleeve 12 and the damping ring 13 between the conical slider seat 15 and the drum plate positioning plate 12.

The spiral push rod structure and the push rod sliding block structure realize the expanding action of the drum plate driven by the single motor.

Further, another purpose of the present application is to independently drive the drum plates to rotate while independently expanding; the embodiment is realized by adopting the following structure:

the application provides an all steel make-up machine laminating drum machine case still includes rotary driving mechanism, and rotary driving mechanism sets up on the front side of frame, and it includes second servo motor 63, rotates the gear 65 of being connected, meshes driven rotation wheel with gear 65 with second servo motor 63, it has a rack section and one in the circumference of rotation wheel and continues the smooth section that forms two free sides in rack section, rack section and gear 65 mesh cooperation are in order to drive the rotation of rotating the wheel, the partition region that forms between smooth section and the rack section prevents to rotate the wheel rotatory, it 66 and first push rod 46 normal running fit to rotate the wheel, first push rod 46 and second push rod 8 fixed connection; thus, through the driving of the second servo motor, due to the front and back positioning action of the positioning sleeve 12 and the drum plate positioning plate 5, the second push rod 8 drives the drum plate linked with the second push rod to rotate, and therefore the drum plate is independently controlled to rotate by adopting the single motor.

The present invention further provides a rotary pneumatic sealing mechanism 2, referring to fig. 4, the rotary pneumatic sealing mechanism includes a hollow main shaft 28 fixedly sleeved outside the first push rod 46, an inner sleeve 27 sleeved on the hollow main shaft 28, an outer sleeve 25 sleeved on the inner sleeve 27, an end sleeve 30 fixed at the front end of the outer sleeve 25, and a stop plate 29 fixed with the end sleeve; the outer ring surface of the outer sleeve 25 is provided with a compressed gas inlet, the inner side of the outer sleeve is provided with a plurality of ring gas grooves along the length extension direction of the outer sleeve, and the compressed gas inlet is penetrated through the ring gas grooves; a plurality of round holes are uniformly distributed on the outer annular surface of the inner sleeve 27, a plurality of inner side ring air grooves are formed on the inner side of the inner sleeve along the length extension direction of the inner sleeve, and the round holes are penetrated through the inner side ring air grooves;

the front side and the rear side of the annular gas groove on the inner side of the inner sleeve 27 and the annular gas groove of the outer sleeve are provided with sealing rings 26 to ensure sealing;

a plurality of air holes are spirally distributed on the hollow main shaft 28 to provide required compressed air for manufacturing products on the drum plate; the inner side annular air groove of the inner sleeve 27 corresponds to a plurality of air holes of the hollow main shaft 28, and the inner side annular air groove of the outer sleeve 25 corresponds to a round hole on the outer ring surface of the inner sleeve 27.

The gas effect in the gas ring, 1 way gas is the evacuation, provides the absorption help for when laminating the composite, makes the composite material adsorb 360 degrees on the laminating drum and rotates, forms an annular section of thick bamboo. The 2-path air is used for blowing, and when the formed annular tire body cylinder is separated from the attaching drum, the air is blown from the air holes in the attaching drum plate, so that the composite material is prevented from being bonded on the attaching drum plate and cannot be separated.

In the embodiment, referring to fig. 4, the outer sleeve comprises 3 outer sleeve units sleeved outside the inner sleeve, and the end sleeve connects the 3 outer sleeve units together by 4 long bolts 31, wherein 2 bolts 31 are fixed on the stop plate 29 to prevent the inner sleeve 27, the outer sleeve 25 and the end sleeve 30 from rotating together with the hollow main shaft 28;

in this embodiment, trapezoidal nuts 55 are disposed on the left and right sides of the pushing disk 48, the first lead screw 47 and the second lead screw 53 are respectively in screw fit with the two trapezoidal nuts 55, the middle region of the pushing disk 48 is fixedly connected with the first push rod 46 by using double nuts, the first push rod 46 is disposed on the frame through a linear bearing 45, and is connected with the second push rod 46 after penetrating through the hollow main shaft 28; two trapezoidal nuts push and pull the pushing disc synchronously, and the linear motion of the central push rod in the case is ensured. In this embodiment, the front side of the drum plate is provided with a positioning plate 5 connected to the carcass drum spindle to limit the forward movement of the drum plate.

In this embodiment, the hollow spindle 28 is keyed to the carcass drum by means of the flange 11 and screws.

The hollow main shaft is internally provided with 6 radial air passages which are communicated with 6 air holes on the outer ring surface, the air passages are symmetrically distributed along the axis, and the air passages are independently controlled to finish required actions.

The left end of the hollow main shaft is fixed on the bearing outer ring by screws, and the bearing inner ring is fixed on the rack by screws.

The utility model provides a tire bead presetting mechanism 3 which adopts a tire bead prefabricating mechanism disclosed in CN112265303A and specifically comprises a fixed disc 34, a rotating disc 33, connecting plates 35, guide rails 36, an L-shaped expansion plate 37, expanding grippers 32, an upper air cylinder 38, a lower air cylinder 39, a cushion pad 41, a jackscrew 42, an adjusting block base 43, an upper guide rod 40 and a lower guide rod 44, wherein the connecting plates 35 are fixed on the outer side and can realize radial sliding, at least four groups of connecting plate assemblies are provided, each connecting plate 35 assembly comprises the connecting plate 35 arranged on the fixed disc 34 and the expanding grippers 32 arranged on each connecting plate 35, each gripping surface of the expanding grippers 32 after expanding grippers 32 is positioned on the same circumferential surface, a straight groove is arranged on the disc surface of the fixed disc 34 corresponding to each connecting plate 35 in a mirror image mode, the upper guide rod 40 and the lower guide rod 44 are pushed by the upper air cylinder 38 and the lower air cylinder 39 together with the fixed disc 34 and the rotating disc 33 along the straight bearing seat on a drum box, the perpendicularity of the presetter and a horizontal line is guaranteed through the design of the upper diagonal and the lower diagonal, the original manual preset of the tire side or fixed and single preset is changed into automatic adjustable preset, the structure is simple, small and exquisite and suitable for various models, the manual labor intensity is reduced, and the precious space on the tire drum is saved.

Based on the all-steel forming machine laminating drum case provided above, the utility model provides a working method for laminating a drum plate of the drum case of the all-steel forming machine, which comprises the following steps:

1) the first servo motor 62 outputs the speed reducer 61 and then drives the synchronous belt pulley sets 59,50,56 and 58 to transmit, the synchronous belt pulley sets 59,50,56 and 58 drive the first screw rod 47 and the second screw rod 53 to rotate, the push disc 48 in threaded fit with the first screw rod 47 and the second screw rod 53 moves forwards, the push disc 48 then drives the first push rod 48 connected with the push disc to move forwards, and the first push rod further drives the second push rod 8 connected with the first push rod to move forwards;

2) the second push rod 8 is in sliding fit with the inclined guide rail of the drum plate 6 by utilizing the conical slide block seat 15 and the slide block 14 on the conical slide block seat, and due to the limiting effect of the limiting plate 5 at the right side of the drum plate, the thrust force of the second push rod 8 towards the right side is limited by the elastic resetting piece 17 (pressure spring) and the spring pressing block 20 at the rear side of the elastic resetting piece, so that the drum plates 6 are slowly expanded outwards;

3) after the first servo motor 62 stops working, the second push rod 8 automatically resets to the initial position due to the reset power provided by the elastic reset piece 17, and the center push rod in the drum body is skillfully matched with the spring, so that the expansion and contraction time is greatly saved;

4) the second servo motor 64 works to drive the gear 65 to rotate, the gear 65 is meshed with the rack section of the rotating wheel 66 to drive the rotating wheel 66 to rotate, the rotating wheel 66 is in rotating fit with the first push rod 46, the first push rod 46 further drives the second push rod 8 to rotate, and finally the drum plate 6 is driven to rotate,

the expansion and rotation work of the drum plate is independently controlled by the two servo motors, namely the two first servo motors and the two second servo motors, so that the problem that the two steps of rotation and expansion of the drum plate are not interfered mutually is effectively solved. The utility model changes the original complex single carcass case and carcass drum into the carcass case and carcass drum with simple structure and multiple functions, thereby effectively reducing the occurrence of failure rate, improving the tire yield and obtaining greater economic benefit.

The utility model provides a high-efficiency laminating drum case of an all-steel forming machine, which belongs to the technical field of tire manufacturing, solves the problems of complex structure, easy abrasion of each part, low efficiency of manufacturing tire products and the like of the existing tire body drum, and is applied in combination with the earlier stage of an inner tire bead presetting device of a tire forming machine, the patent number is as follows: CN112265303A, hope to carry out comprehensive lifting performance on the whole body of the tire building machine tire body drum part, the full steel high-efficiency laminating drum chassis device comprises a tire body drum push rod slide block mechanism, a rotary sealing pneumatic mechanism, an inner side tire bead presetting mechanism and a spiral push rod mechanism, wherein a slide block and slide rail type is adopted for a movement method for unfolding a drum plate in the tire body drum push rod slide block mechanism, so that the occurrence rate of failure is greatly reduced, a central push rod in a chassis is adopted in the tire body drum push rod slide block mechanism to push against a central push rod in the drum body, the central push rod in the drum body is ingeniously matched with a spring, so that the expansion and contraction time is greatly saved, a rotating wheel, a connecting plate, an L-shaped expansion plate and an expansion claw are arranged on the inner side tire bead presetting mechanism, the automatic adjustment is carried out according to the required size of a tire bead, the labor intensity is reduced, and the spiral push rod mechanism drives a left lead screw and a right lead screw to rotate by a left synchronous belt wheel and a right synchronous belt wheel, two trapezoidal nuts push and pull the pushing disc synchronously, and the linear motion of the central push rod in the case is ensured.

Claims (5)

1. A drum plate rotation driving mechanism of a forming machine laminating drum is characterized by comprising:

a plurality of drum plates (6) surrounding the outer side of the carcass drum, the whole drum plates form a cylinder shape on the outer side of the carcass drum, the front side and the rear side of each drum plate are respectively provided with a front limiting piece and a rear limiting piece so as to limit the longitudinal displacement of the drum plates, the drum plates are connected with a second push rod,

the rotary driving mechanism comprises a second servo motor (63), a gear (65) rotationally connected with the second servo motor (63), and a rotary wheel in meshing transmission with the gear (65), wherein a rack section and a smooth section continuously formed on two free sides of the rack section are arranged on the periphery of the rotary wheel, the rack section is in meshing fit with the pinion to drive the rotary wheel to rotate, a separation area formed between the smooth section and the rack section prevents the rotary wheel from rotating, the rotary wheel is rotationally matched with a first push rod, and the first push rod is connected with a second push rod;

the rotary pneumatic sealing mechanism comprises a hollow main shaft (28) fixedly sleeved outside the first push rod, an inner sleeve (27) sleeved on the hollow main shaft, an outer sleeve (25) sleeved on the inner sleeve (27), an end sleeve (30) fixed at the front end of the outer sleeve (25) and a stop plate (29) fixed with the end sleeve;

the outer ring surface of the outer sleeve (25) is provided with a compressed gas input port, the inner side of the outer sleeve is provided with a plurality of annular gas grooves along the length extension direction of the outer sleeve, and the compressed gas input port penetrates through the annular gas grooves;

a plurality of round holes are uniformly distributed on the outer ring surface of the inner sleeve (27), a plurality of inner side ring air grooves are formed in the inner side of the inner sleeve along the length extension direction of the inner side ring air grooves, and the round holes are penetrated through the inner side ring air grooves;

sealing rings are arranged on the front side and the rear side of the annular gas groove on the inner side of the inner sleeve (27) and the annular gas groove on the outer sleeve;

a plurality of air holes are spirally distributed on the hollow main shaft (28) to provide required compressed air for the drum plate when a product is manufactured;

the inner side annular air groove of the inner sleeve (27) corresponds to a plurality of air holes of the hollow main shaft (28), and the inner side annular air groove of the outer sleeve (25) corresponds to a round hole on the outer ring surface of the inner sleeve (27).

2. The drum plate rotation driving mechanism according to claim 1, wherein the outer sleeve comprises 3 outer sleeve units fitted around the outer side of the inner sleeve, and the end sleeve connects the 3 outer sleeve units together by 4 long bolts (31), wherein 2 bolts (31) are fixed to the stopper plate (29) to prevent the inner sleeve (27), the outer sleeve (25) and the end sleeve (30) from rotating together with the hollow main shaft (28).

3. Drum plate rotation drive mechanism according to claim 1, characterized in that the hollow spindle engages the carcass drum by means of a flange (11) keyed to the screw.

4. The drum plate rotation driving mechanism of claim 1, wherein 6 radial air passages are provided in the hollow main shaft to penetrate 6 air holes in the outer annular surface, and the air passages are symmetrically distributed along the axial center to independently control the air passages to perform the required actions.

5. The drum plate rotation drive mechanism according to claim 1, wherein the left end of the hollow main shaft is fixed to the bearing inner race by a screw, and the bearing inner race is fixed to the frame by a screw.

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