WO2022121785A1

WO2022121785A1 - Single-screw servo turn-up mechanical building drum

Info

Publication number: WO2022121785A1
Application number: PCT/CN2021/135236
Authority: WO
Inventors: 张晓辰; 向源芳; 罗赤峰
Original assignee: 天津赛象科技股份有限公司; 天津赛象机电工程有限公司
Priority date: 2020-12-10
Filing date: 2021-12-03
Publication date: 2022-06-16
Also published as: CN112477219A

Abstract

Disclosed is a single-screw servo turn-up mechanical building drum, mainly comprising side drums, a hollow main shaft, a screw, a servo motor, nuts, connecting keys, turn-up rod sets, positioning devices, and locking devices. The positioning devices are designed with two structures and can achieve locking between the turn-up rod sets and the side drums, the locking devices can achieve locking between the side drums and the hollow main shaft, and the flat width adjustment and turn-up operation of an unvulcanized tire can be completed by adjusting the locking states of the positioning devices and the locking devices. Moreover, the positioning devices have a compact structure, achieve stable locking, and have a self-centering effect, and can compensate for the accumulated movement error of a servo system in the process of driving turn-up rods to perform turn-up operation; the locking devices cleverly utilize the magnifying effect of three-stage inclined wedges on the force to hold bearing shells on the hollow main shaft to achieve the locking of the side drums and the hollow main shaft, and the locking devices have a compact structure, are simple to implement, are easy to maintain, and achieve locking stable.

Description

Single lead screw servo reverse wrapping mechanical forming drum

technical field

The invention relates to the technical field of tire building equipment, in particular to a single-screw servo turn-over mechanical forming drum.

Background technique

Chinese patent application (publication number: CN102036810B, publication date: 2013.04.03) discloses a tire building drum for forming unvulcanized tires. Among them, the side drum and the turn-up rod group are connected by the way of cylinder pressing, and the side drum is locked by the tooth meshing positioning method through the meshing of the toothed piston with the main shaft. Since the minimum positioning accuracy is constrained by the size of the tooth shape, it is necessary to The teeth are made small enough, but the small teeth have problems such as slipping teeth and serious wear when the piston pressure is insufficient, and their connection reliability is poor. In addition, when installing the side drum, the teeth on the outer wall of the main shaft will affect the sealing of the side drum.

Chinese patent application (publication number: CN110549661A, publication date: 2019.12.10) discloses a locking device and a tire building drum. Among them, the side drum, the turnbuckle rod group and the main shaft are all locked by the friction force generated by the hydraulic brake. The hydraulic brake can generate the required locking friction through a large enough positive pressure. When the brake is applied, the excessive positive pressure will cause the deformation of the main shaft sleeve, which will cause it and the main shaft to be easily locked, or cause problems such as wear and tear between the main shaft and the main shaft, and the pressure is too small to generate enough friction. As mentioned above, the pressure of the force-transmitting medium can reach hundreds of MPa, and the life of the corresponding seal will be affected by this, and the locking device is difficult to realize, and there are special requirements for materials, sealing, etc. And maintenance is more difficult.

In addition, although the servo-driven lead screw performs precise walking positioning, a small walking error will still occur each time. After multiple walking and positioning, the relative position of the side drum and the turn-up rod group will be shifted, which will lead to the forming drum. The corresponding process could not be completed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to make up for the deficiencies of the prior art, and to provide a single-screw servo turn-over mechanical forming drum with good locking effect and self-centering function.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A single-screw servo turn-up mechanical forming drum, comprising a side drum, a hollow spindle, a lead screw, a servo motor, a screw nut, a turn-up rod group, a connection key and a locking device, the side drums are two sets and slide symmetrically It is sleeved on the hollow main shaft and used to lock the unvulcanized tire. The screw coaxially penetrates the hollow main shaft and is driven by the servo motor to rotate. There are two screw nuts with opposite directions of rotation. Symmetrical transmission is connected on both sides of the lead screw, the set of turn-up rods is two sets and is symmetrically sleeved on the two sets of the side drums in one-to-one correspondence and is used to realize the turn-up operation of the unvulcanized tire, There are two sets of the connecting keys and are used to realize the one-to-one connection between the two threaded nuts and the two sets of the turn-up rod groups, and the locking devices are two sets and are symmetrically installed in the two sets of the two sets. on the side drum and used to realize the locking between the two sets of the side drum and the hollow main shaft; each of the locking devices respectively comprises a second annular casing, a second annular piston, a second steel ball, a wedge sleeve and Bearing bush; in the same locking device, the second annular casing is slidably sleeved on the hollow main shaft and is fixedly connected with a shaft sleeve of the side drum, and the inner wall of the second annular casing is There is also an annular opening; in the same locking device, the second annular piston is slidably mounted inside the second annular casing and divides the inner cavity of the second annular casing into a second left air cavity and the second right air chamber, the second left air chamber and the second right air chamber are both connected with a second air pump, and a second annular piston cone surface is also formed on the inner wall of the second annular piston; In the same locking device, there are a plurality of the bearing bushes and are evenly distributed on the outer wall of the hollow main shaft in the circumferential direction, the wedge sleeves are two, and the two wedge bushes and the plurality of the bearing bushes are also inserted. In the annular opening of the second annular housing, the two wedge sleeves are symmetrically pressed on the conical surfaces of the bearing bushes on both sides of the outer wall of each of the bearing bushes by using the inner conical surfaces of the wedge sleeves on the respective inner walls, and one of the wedge sleeves A wedge sleeve side tapered surface is also formed on one side of the sleeve, and an annular groove is formed between the wedge sleeve side tapered surface and the side wall of the annular opening; in the same locking device, the first There are a plurality of two steel balls and are evenly distributed between the annular groove and the second annular piston conical surface in the circumferential direction; in the same locking device, the second annular piston is driven by the second air pump in the same locking device. sliding in the second annular casing; using the second annular piston conical surface to squeeze each of the second steel balls to move, and push the two wedge sleeves to jointly squeeze each of the bearing bushes, so as to push the hollow main shaft Hold tightly; or release the pressing of each of the second steel balls, and then release the pressing of the two wedge sleeves on the bearing bush, so as to release the hollow main shaft.

Further, each of the locking devices also includes two elastic rubber rings respectively. In the same locking device, a wing plate is respectively provided on the outer side of each of the bearing bushes, and the two elastic rubber rings are both in the shape of a wing. It is in the state of being expanded outward and is separated on the inner side of the wing plate of each of the bearing bushes, so as to drive each of the bearing bushes to loosen the hollow main shaft when the hollow main shaft is released.

Further, the single-screw servo turn-over mechanical forming drum is also provided with a positioning device, and the positioning device can be two sets of symmetrically arranged first positioning devices, and each of the first positioning devices is respectively sleeved on one of the side drums. , and each of the first positioning devices is also connected with a set of turnbuckles through the connecting key, and each of the first positioning devices respectively includes a third annular casing, a third annular piston and a third steel ball; in the same first positioning device, the third annular casing is slidably sleeved on the shaft sleeve of the side drum, and the inner wall of the third annular casing is evenly distributed with a plurality of A circular hole; in the same first positioning device, the third annular piston is slidably installed inside the third annular housing and divides the inner cavity of the third annular housing into a third left air cavity and a third left air cavity. Three right air chambers, the third left air chamber and the third right air chamber are both connected to a third air pump, and a third annular piston cone surface is also formed on the inner wall of the third annular piston; In the first positioning device, a plurality of the third steel balls are installed in a plurality of the circular holes in a one-to-one correspondence, and a plurality of cones are also distributed evenly in the circumferential direction on the shaft sleeve of each of the side drums. A plurality of the conical grooves and a plurality of the third steel balls are used in a one-to-one correspondence, and the plurality of the third steel balls are also arranged on the third annular piston conical surface and the corresponding between the outer walls of the shaft sleeve or between the third annular piston conical surface and each of the conical grooves; in the same first positioning device, the third annular piston is driven by the third air pump The piston slides in the third annular casing; the third annular piston conical surface is used to press each of the third steel balls into the corresponding conical grooves, so that each of the third steel balls is pressed Tightly between the third annular piston conical surface and the corresponding conical groove, so as to lock the first positioning device on the corresponding shaft sleeve, so as to realize the shaft sleeve and its corresponding counter The locking of the package rod group; or release the extrusion of each of the third steel balls, and when the first positioning device slides along the corresponding shaft sleeve driven by the corresponding connecting key, each The third steel ball rolls from the corresponding conical groove to the outer wall of the corresponding shaft sleeve, so that each of the third steel balls is pressed against the third annular piston conical surface and the corresponding between the outer walls of the shaft sleeve to release the lock between the first positioning device and the corresponding shaft sleeve, thereby releasing the lock between the shaft sleeve and the corresponding turn-up rod group.

Further, the outer wall of the third annular housing in each of the first positioning devices is also provided with a plurality of support grooves in the circumferential direction, and in the same first positioning device, each of the support grooves is used for a Each of the turn-up bars in the corresponding turn-up bar group is supported correspondingly.

Further, the single-screw servo reverse wrapping mechanical forming drum is also provided with a positioning device, and the positioning device can also be two sets of second positioning devices, and the two sets of the second positioning devices are respectively sleeved on the hollow main shaft symmetrically, And each of the second positioning devices is also fixed with one of the shaft sleeves respectively, and each of the second positioning devices respectively includes a fourth annular casing, a fourth annular piston, a hinge rod and a sliding latch; In the second positioning device, the fourth annular casing is slidably sleeved on the hollow main shaft, one end of the fourth annular casing is formed with an inner cavity, the other end is provided with an annular plate, and the side surface of the annular plate is A plurality of radially arranged guide rails are evenly distributed in the circumferential direction, each of the guide rails is slidably installed with a sliding pin, and each sliding pin is used in cooperation with a slot, wherein a plurality of the slots are circumferentially uniform. The cloth is formed on the inner wall of the end of the turn-up rod base of the turn-up rod group; in the same second positioning device, the fourth annular piston is a sleeve-like structure with a stepped outer wall, so The fourth annular piston is slidably mounted on the fourth annular casing, and the large diameter end of the fourth annular piston divides the inner cavity of the fourth annular casing into a fourth left air chamber and a fourth right air chamber , the fourth left air chamber and the fourth right air chamber are both connected to a fourth air pump, and the small diameter end of the fourth annular piston penetrates the inner cavity of the fourth annular casing and extends toward the annular plate. side extension; in the same second positioning device, each of the sliding pins is hinged with the small diameter end of the fourth annular piston through a hinge rod; in the same second positioning device, through The fourth air pump drives the fourth annular piston to slide on the fourth annular housing, so as to drive each of the sliding pins to perform radial expansion and contraction along the respective corresponding guide rails, thereby moving each of the The sliding pins are inserted into the respective corresponding slots or pulled out from the respective corresponding slots, so as to realize the Lock or unlock.

Further, each of the side drums respectively comprises a bushing and a tire support mechanism, and each of the tire support mechanisms respectively includes a first annular casing, a first annular piston, a connecting rod and a lock block; in the same side drum , the shaft sleeve is slidably sleeved on the hollow main shaft; in the same side drum, the first annular casing is fixedly connected to the shaft sleeve, and the outer wall of the first annular casing is also open There is a guide ring groove; in the same side drum, the first annular piston is slidably installed inside the first annular casing and divides the inner cavity of the first annular casing into a first left air chamber and a first left air chamber. a right air chamber, the first left air chamber and the first right air chamber are both connected to a first air pump; in the same side drum, the locking blocks are multiple and are evenly distributed on the guide In the ring groove, each of the lock blocks is hinged with the first annular piston through a connecting rod; in the same side drum, the first annular piston is driven by the first air pump in the same side drum. The first annular casing slides inside to drive each of the locking blocks to perform radial expansion and contraction movement along the guide ring groove, so as to lock or unlock the unvulcanized tire.

Further, the hollow main shaft and the two shaft sleeves are provided with guide grooves for the connecting keys to pass through, one end of each connecting key is fixed with the corresponding nut, and the other end is connected with a The base of the turn-up rod is fixed.

Further, each of the turn-up rod groups respectively comprises the turn-up rod base and a plurality of turn-up rods evenly distributed in the circumferential direction around the hollow main shaft, and each of the turn-up rod bases is slidably sleeved on the hollow main shaft. On the corresponding shaft sleeve, one end of each turn-up rod is hinged with the corresponding turn-up rod base, and a turn-up roller is installed at the other end.

Compared with the prior art, the beneficial effects of the present invention are: two positioning devices and locking devices are designed in the present invention, wherein, the two positioning devices are compact in structure, stable in locking, and have self-centering effects, which can compensate for servo The walking error accumulated by the system in the process of driving the turn-up rod for turn-up operation; the locking device has a compact structure, simple realization process, easy maintenance and stable locking. Hold the bearing bush firmly on the hollow spindle.

Description of drawings

In order that the advantages of the present invention may be more readily understood, the present invention briefly described above will be described in more detail by reference to specific embodiments shown in the accompanying drawings. Understanding that these drawings depict only typical embodiments of this invention and are therefore not to be considered limiting of its scope, the accompanying drawings will illustrate the invention with additional specificity and detail.

Fig. 1 is the front view cutaway structure schematic diagram of Embodiment 1 of the present invention;

Fig. 2 is the front view sectional structure schematic diagram of embodiment 1 of the present invention in the reverse packet operation state;

3 is a schematic structural diagram of a first positioning device in Embodiment 1 of the present invention;

4 is a schematic structural diagram of a locking device in Embodiment 1 of the present invention;

Fig. 5 is the front view cutaway structure schematic diagram of Embodiment 2 of the present invention;

FIG. 6 is a schematic view of the front section of the structure of Embodiment 2 of the present invention in a reverse packet operation state;

FIG. 7 is a schematic structural diagram of a second positioning device in Embodiment 2 of the present invention.

Among them, 1-side drum, 11-shaft sleeve, 111-conical groove, 12-tire support mechanism, 121-first annular casing, 122-first annular piston, 123-connecting rod, 124-lock block, 2- Hollow spindle, 21-guide groove, 3-screw, 4-nut, 5-connection key, 6-turn-up rod set, 61-turn-up rod base, 611-slot, 62-turn-up rod, 63 -Turn-up roller, 7-first positioning device, 71-third annular casing, 72-third annular piston, 73-third steel ball, 74-support groove, 8-second positioning device, 81-fourth annular Shell, 82-the fourth annular piston, 83-articulated rod, 84-sliding bolt, 85-ring plate, 9-locking device, 91-second annular housing, 92-second annular piston, 93-bearing bush, 94- Wing plate, 95-left wedge sleeve, 96-right wedge sleeve, 97-second steel ball, 98-elastic rubber ring, 99-ring groove, 10-unvulcanized tire.

Detailed ways

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that embodiments of the invention may be practiced without one or more of these details. In other instances, some technical features known in the art are not described in order to avoid confusion with the embodiments of the present invention.

For a thorough understanding of the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom", etc. indicate the orientation or positional relationship based on the drawings The illustrated orientation or positional relationship is only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

Example 1

Referring to FIGS. 1 to 4 , this embodiment provides a single-screw servo turn-over mechanical forming drum, which mainly includes a side drum 1 , a hollow spindle 2 , a lead screw 3 , a servo motor (not shown in the figure), and a nut 4 , connecting key 5 , turn-up lever group 6 , first positioning device 7 and locking device 9 . Among them, two sets of side drums 1 are installed symmetrically on the hollow main shaft 2, and the two sets of side drums 1 are mainly used to lock the unvulcanized tire 10; 3. Coaxially runs through the interior of the hollow main shaft 2 and rotates under the drive of the servo motor; two screw nuts 4 are used in conjunction with the lead screw 3, and the two screw nuts 4 are symmetrically installed on the lead screw 3 in opposite directions. , each nut 4 is also connected with a set of connecting keys 5 respectively; the connecting keys 5 are two sets and are used in conjunction with the two nut 4 in one-to-one correspondence, and the two sets of connecting keys 5 are symmetrically arranged and radially penetrate the corresponding The shaft sleeves 11 of the hollow main shaft 2 and the two side drums 1, correspondingly, guide grooves 21 are symmetrically opened on the hollow main shaft 2 and the shaft sleeves 11 of the two side drums 1, and the guide grooves 21 can be used for the connecting keys 5 to pass through. It plays a guiding role for the connection key 5; the turn-up rod group 6 is two sets and is hinged with the two sets of connection keys 5 in one-to-one correspondence, and the two sets of turn-up rod groups 6 are symmetrically arranged and used for turning up the unvulcanized tire 10. Operation; the first positioning device 7 is two sets and is fixedly connected with the two sets of connecting keys 5 in one-to-one correspondence, and makes the connecting keys 5, the turn-up rod group 6 and the first positioning device used in conjunction with the same side drum 1 The devices 7 are fixed together, and the first positioning device 7 is mainly used for locking between the side drum 1 and the turn-up rod group 6, and has a centering effect; the locking devices 9 are two sets and are respectively one with the two sets of side drums 1. They are fixed in a corresponding manner, and are mainly used to realize the locking between the two sets of side drums 1 and the hollow main shaft 2 .

As shown in Figure 1 and Figure 2, in this embodiment, the two sets of side drums 1 have the same structure and are symmetrically arranged, and now take one side drum 1 as an example to describe its structure in detail: the side drum 1 includes a shaft sleeve 11 and a tire Support mechanism 12 .

The shaft sleeve 11 is fitted on the hollow main shaft 2 and the shaft sleeve 11 can be slidably matched on the hollow main shaft 2 . When the first positioning device 7 is in the locked state and the locking device 9 is in the unlocked state, the servo motor drives the lead screw 3 to rotate, and then the driving force can be transferred through the screw nut 4, the connection key 5 and the first positioning device 7. It is transmitted to the shaft sleeve 11 and drives the shaft sleeve 11 and the locking device 9 to slide along the hollow main shaft 2 .

The tire support mechanism 12 includes a first annular casing 121 , a first annular piston 122 , a connecting rod 123 and a lock block 124 . The first annular casing 121 is annular as a whole and is fixed to the end of the shaft sleeve 11 close to the unvulcanized tire 10. The first annular casing 121 and the shaft sleeve 11 can be made in one piece or welded together; the first annular casing 121 An inner cavity is formed inside the inner cavity, and a first annular piston 122 is slidably installed in the inner cavity, and the first annular piston 122 divides the inner cavity into a first left air cavity and a first right air cavity, and the first left air cavity is and the first right air cavity are connected with a first air pump, and the first annular piston 122 can be driven to move left and right by inflating and deflating the first left air cavity and the first right air cavity through the first air pump; the outer wall of the first annular housing 121 There is also a guide ring groove on the guide ring groove, which is not communicated with the first left air chamber and the first right air chamber under the blocking action of the first annular piston 122, and a plurality of lock blocks 124 are circumferentially distributed in the guide ring groove. , each lock block 124 is also hinged with the first annular piston 122 through a connecting rod 123 respectively. The first annular piston 122 can be driven to slide in the first annular housing 121 by the first air pump, thereby driving each connecting rod 123 to move, and then each connecting rod 123 drives each locking block 124 to expand along the radial direction of the guide ring groove When each lock block 124 expands outward, the locking of the unvulcanized tire 10 can be realized, so as to facilitate the subsequent process of the unvulcanized tire 10. When each lock block 124 is retracted inward, the unvulcanized tire can be released. 10 to facilitate the removal of the unvulcanized tire 10.

As shown in Figure 1 and Figure 2, in this embodiment, the two sets of connection keys 5 have the same structure and are symmetrically arranged, and now take a set of connection keys 5 as an example to describe the structure in detail: Guide rods, the two guide rods are arranged symmetrically up and down, and the first ends of the two guide rods are respectively fixed on the nut 4, and the second ends pass through the guide grooves 21 opened on the hollow spindle 2 and the shaft sleeve 11 respectively and Extending outward, the width of the guide rod and the guide groove 21 are the same. Under the driving of the nut 4, the two guide rods can move left and right along the guide groove 21 (ie, move axially), and the second guide rod of the two guide rods The ends are also connected with the first positioning device 7 and the turn-up rod group 6, so that the first positioning device 7 and the turn-up rod group 6 can be driven to move left and right.

As shown in Figures 1 and 2, in this embodiment, the two sets of turn-up rod groups 6 have the same structure and are symmetrically arranged, and now take a set of turn-up rod groups 6 as an example to describe their structures in detail: 6. It includes a turn-up rod base 61, a plurality of turn-up rods 62 and turn-up rollers 63 that are evenly distributed in the circumferential direction of the hollow main shaft 2, the turn-up rod base 61 is slidably sleeved on the shaft sleeve 11, and the turn-up rod base 61 is also fixedly connected with the connecting key 5, one end of each turn-up rod 62 is hinged with the turn-up rod base 61, and the other end is mounted with a turn-up roller 63. The turn-up lever group 6 is mainly used to realize the turn-up operation. When the first positioning device 7 is in the unlocked state and the locking device 9 is in the locked state, driven by the connecting key 5, the turn-up lever group 6 Each turn-up bar 62 swings around the hinge point on the turn-up bar base 61 , and enables the turn-up rollers 63 on each turn-up bar 62 to perform a rolling operation along the sidewall of the unvulcanized tire 10 .

As shown in FIG. 1 to FIG. 3 , in this embodiment, the two sets of first positioning devices 7 have the same structure and are symmetrically arranged. Now, a set of first positioning devices 7 is used as an example to describe the structure in detail: the first positioning device 7 includes a third annular casing 71 , a third annular piston 72 and a third steel ball 73 .

The third annular casing 71 is fitted on the shaft sleeve 11 of the side drum 1 , and the outside of the third annular casing 71 is also fixedly connected with the connecting key 5 . The third annular casing 71 can be driven by the connecting key 5 on the sleeve 11 Sliding upward; an inner cavity is formed inside the third annular housing 71, in which a third annular piston 72 is slidably installed, and the third annular piston 72 divides the inner cavity into a third left air cavity and a third right air cavity The air cavity, the third left air cavity and the third right air cavity are all connected with a third air pump, and the third annular piston 72 can be driven to move left and right by inflating and deflating the third left air cavity and the third right air cavity through the third air pump. The lower part of the third annular piston 72 is formed with a conical surface and is defined as the conical surface of the third annular piston 72; the inner wall of the third annular casing 71 also has a plurality of circular holes evenly distributed in the circumferential direction, and the diameter of each circular hole is larger than its The height of itself, a third steel ball 73 is placed in each circular hole. The diameter of the third steel ball 73 is the same as the diameter of the circular hole. The third steel ball 73 can move in the circular hole and is placed in the hole. The upper part of the third steel ball 73 in the circular hole is in contact with the conical surface of the third annular piston 72. Correspondingly, a plurality of conical grooves 111 are evenly distributed in the circumferential direction on each shaft sleeve 11. The number of conical grooves 111 is the same as The number of the third steel balls 73 is the same, and the two are used in a one-to-one correspondence.

The movement of the third annular casing 71 is realized by the servo motor driving the lead screw 3, and the position of the third annular casing 71 can be accurately given by the servo system. As shown in FIG. 3 , when the circular hole on the third annular housing 71 is aligned with the conical groove 111 on the shaft sleeve 11, the third air pump inflates the third right air chamber, the third annular piston 72 moves to the left, and the third air pump moves to the left. The conical surface of the three annular pistons 72 presses the third steel ball 73 into the conical groove 111 on the shaft sleeve 11. At this time, the third annular casing 71 will be locked on the shaft sleeve 11. The group 6 is fixedly connected to the third annular housing 71 , so the connecting key 5 and the turn-up rod group 6 are also locked on the shaft sleeve 11 . Thanks to the appropriate small angle of the conical surface of the third annular piston 72, the mechanism has a certain self-locking performance, and a small inflation pressure to the third right air chamber can provide stable positioning of the third annular housing 71; and The positioning of the first positioning device 7 has a self-centering effect, which can compensate for the accumulated error in the repeated walking process of the servo system, and can always position the third annular casing 71 at the same position of the corresponding shaft sleeve 11 to ensure the turn-up rod assembly. 6 Always have the same initial position on the corresponding bushing 11 . When the third air pump inflates the third left air cavity, the third annular piston 72 moves to the right, and the first positioning device 7 enters the non-positioning state (ie, the unlocking state), because the shaft sleeve 11 and the third annular piston 72 There is just a space for accommodating the third steel ball 73 (this space is not connected with the third left air cavity and the third right air cavity), so when the third annular shell 71 moves to either direction on both sides, the third steel ball The balls 73 will naturally push up along the inclined wall of the conical groove 111 and enter the space for accommodating the third steel balls 73 , and then the third annular casing 71 can move freely and unhindered in the axial direction, so that the turn-up rod group 6 can be relative to each other. Moving on the shaft sleeve 11 provides conditions for the turn-up operation of the turn-up rod group 6 .

Further, a plurality of support grooves 74 are evenly distributed on the outer wall of the third annular housing 71 in the circumferential direction. The rods 62 are used in a one-to-one correspondence, and each support slot 74 is used for receiving and supporting each turn-up rod 62 in the turn-up rod group 6 in a retracted state.

Further, in order to ensure that the third annular piston 72 can be smoothly installed into the third annular housing 71, the third annular housing 71 can be divided reasonably, and the sealing assembly can be performed after the third annular piston 72 is installed.

As shown in Figure 1, Figure 2 and Figure 4, in this embodiment, the two sets of locking devices 9 have the same structure and are symmetrically arranged, and now take a set of locking devices 9 as an example to describe the structure in detail: 9 includes a second annular casing 91 , a second annular piston 92 , a bearing bush 93 , a wedge sleeve, a second steel ball 97 and an elastic rubber ring 98 .

The second annular casing 91 is fitted on the hollow main shaft 2, and the outside of the second annular casing 91 is also fixedly connected to the shaft sleeve 11 of the side drum 1, and the second annular casing 91 is located at the end of the shaft sleeve 11 away from the tire support mechanism 12, The second annular casing 91 can slide on the hollow main shaft 2 along with the shaft sleeve 11; an inner cavity is formed inside the second annular casing 91, and the second annular piston 92 is slidably installed in the inner cavity, and the second annular piston 92 The inner cavity is divided into a second left air cavity and a second right air cavity, and both the second left air cavity and the second right air cavity are connected with a second air pump, and the second left air cavity and the second air cavity are connected to the second air cavity through the second air pump. Inflating and deflating the two right air chambers can drive the second annular piston 92 to move left and right; a conical surface is formed on the inner wall of the second annular piston 92 and is defined as the second annular piston conical surface; the inner wall of the second annular housing 91 also has a An annular opening, the annular opening is not communicated with the second left air chamber and the second right air chamber under the barrier of the second annular piston 92, and a second steel ball 97, a wedge sleeve and a bearing bush 93 are also placed in the annular opening; There are a plurality of 93 and are evenly distributed on the outer wall of the hollow main shaft 2 in the circumferential direction, and there is a certain gap between each bearing bush 93, so that each bearing bush 93 can have a space for accommodating the deformation of the bearing bush 93 when it is pressed. The outer wall of 93 is symmetrically formed with two conical surfaces and is defined as the conical surface of the bearing bush 93 and the two conical surfaces of the bearing bush 93 located on the same bearing bush 93 are formed on both sides of the outer wall of the bearing bush 93, and the middle part of the outer wall of each bearing bush 93 is also respectively A wing plate 94 is formed to protrude outward; the wedge sleeves are two and both are annular structures, and a cone surface is formed on the inner wall of each wedge sleeve and is defined as the inner cone surface of the wedge sleeve. The two wedge sleeves use their respective The inner conical surface of the wedge sleeve is symmetrically pressed on the conical surfaces of the two bearing bushes 93 on the outer wall of each bearing bush 93, and the two wedge sleeves are respectively defined as the left wedge sleeve 95 and the right wedge sleeve 96, as shown in Figure 4, in the first A partition plate is also provided between the two right air chambers and the annular opening. The right wedge sleeve 96 is positioned and assembled at the angle formed between the inner wall of the partition plate and one side wall of the annular opening. A tapered surface is formed on the side and is defined as the tapered surface of the wedge sleeve side, the tapered surface of the wedge sleeve side and the other side wall of the annular opening form an annular groove 99, wherein the other side wall of the annular opening is a tapered surface and makes the annular groove 99 The second steel balls 97 are multiple and are evenly distributed between the annular groove 99 and the second annular piston conical surface in the circumferential direction; the elastic rubber rings 98 are two and are respectively arranged on the inner wall of the wing plate 94 of each bearing bush 93 , and the two elastic rubber rings 98 are in a state of expanding outward. When the clamping of the hollow main shaft 2 is released, each bearing bush 93 can be opened outward to release the hollow main shaft 2 .

As shown in FIG. 4 , the working principle of the locking device 9 is as follows: when the second air pump inflates the second left air chamber, the second annular piston 92 moves to the right, and the second annular piston conical surface squeezes the second steel ball 97 Move inward, push the left wedge sleeve 95 to move to the right, so that each bearing bush 93 holds the hollow main shaft 2 tightly under the co-extrusion of the left wedge sleeve 95 and the right wedge sleeve 96, and the side drum is locked by the locking device 9. 1 and the relative fixation of the hollow spindle 2. When the second air pump inflates the second right air chamber, the second annular piston 92 moves to the left, and at this time, the pressing of the second steel ball 97 is released, thereby causing each bearing bush 93 to expand under the action of the elastic rubber ring 98 And release the hollow spindle 2 to release the locking of the locking device 9 . At the same time, the elastic rubber ring 98 can ensure that each bearing bush 93 is always in an open state under natural conditions, which makes it more convenient to disassemble and assemble the locking device 9 as a whole. According to the amplifying effect of the slope on the force, when the driving force given by the second annular piston 92 is transmitted to the bearing bush 93, a total of 3 stages of amplification are carried out, so that the bearing bush 93 can generate a positive pressure of a hundred times the piston pressure on the hollow main shaft 2. According to the principle of static friction, so that The locking device 9 can be firmly held on the hollow spindle 2 .

Further, in order to ensure that the second annular piston 92 can be installed into the second annular housing 91 smoothly, the second annular housing 91 can be divided reasonably, and the sealing assembly can be performed after the second annular piston 92 is installed.

The working principle of this embodiment is as follows: when working, first install the unvulcanized tire 10 between the two sets of side drums 1 and lock it with the two tire support mechanisms 12, and adjust the first positioning device 7 to be in a locked state (that is, to make the phase The nut 4, the connecting key 5, the first positioning device 7, the side drum 1, the locking device 9 and the turn-up lever group 6 are relatively fixed), and the locking device 9 is in the unlocked state (that is, the phase Unlock between the side drum 1 and the hollow spindle 2 used together), the servo motor drives the lead screw 3 to rotate, and then drives the two lead nuts 4 to move on and off (even if the two lead nuts 4 move synchronously toward each other or move oppositely) , since the first positioning device 7 is in the locked state, the two sets of connecting keys 5 will synchronously drive the two sets of side drums 1 and the two sets of turn-up rod groups 6 along the respective guide grooves 21 to move together with the two nut 4 to Adjust the distance between the two tire support mechanisms 12 to complete the flat-width adjustment of the unvulcanized tire 10; then adjust the first positioning device 7 to be in an unlocked state, and make the locking device 9 in a locked state, and the servo motor drives the lead screw 3 rotate, and then drive the two nut 4 to move on and off. Since the first positioning device 7 is in the unlocked state, the two sets of connection keys 5 will synchronously drive the two sets of turn-up rod groups 6 along the respective guide grooves 21. The two nut 4 move together, and each turn-up bar 62 in the two sets of turn-up bar sets 6 will swing along the turning point on the corresponding turn-up bar base 61, and make the turn-up roller 63 on the unvulcanized tire. Both sides of the tire 10 are rolled to complete the turn-up operation of the unvulcanized tire 10 .

Example 2

The difference between this embodiment and Embodiment 1 is that the installation position of the locking device 9 is different and the structure and principle of the positioning device are different.

The two sets of locking devices 9 in Embodiment 1 are symmetrically fixed to the ends of the two shaft sleeves 11 away from the tire support mechanism 12 , while in this embodiment, each locking device 9 is fixed to the corresponding shaft sleeve respectively. 11 and the tire support mechanism 12, such a design helps to provide sufficient installation space for the second positioning device without interfering with the second positioning device.

In this embodiment, the two sets of first positioning devices 7 in Embodiment 1 are replaced with two sets of second positioning devices 8 , as shown in FIGS. 5 to 7 , the two sets of second positioning devices 8 have the same structure and are symmetrical The structure is described in detail by taking a set of second positioning device 8 as an example: the second positioning device 8 includes a fourth annular casing 81 , a fourth annular piston 82 , a hinge rod 83 and a sliding latch 84 .

The fourth annular casing 81 is fitted on the hollow main shaft 2 in a matched manner, and the outside of the fourth annular casing 81 is also fixedly connected with the shaft sleeve 11 of the side drum 1 and the fourth annular casing 81 is located at the end of the shaft sleeve 11 away from the tire support mechanism 12 , The fourth annular housing 81 can slide on the hollow main shaft 2 along with the bushing 11 .

One end of the fourth annular casing 81 is formed with an inner cavity, and the other end is provided with an annular plate 85. A plurality of radially arranged guide rails are evenly distributed on the side end surface of the annular plate 85 in the circumferential direction. They are matched and installed together in a one-to-one correspondence. Specifically, each sliding pin 84 is formed with a sliding slot, and each sliding pin 84 is slidably installed on the corresponding guide rail by using the respective sliding slot, and each sliding pin 84 is also They are respectively used in conjunction with a slot 611 , wherein the number of the slots 611 is the same as the number of the sliding pins 84 , and a plurality of slots 611 are formed on the inner wall of the end of the turn-up rod base 61 evenly distributed in the circumferential direction.

The fourth annular piston 82 is a sleeve-like structure with a stepped outer wall, the fourth annular piston 82 is slidably mounted on the fourth annular housing 81 , and the large diameter end of the fourth annular piston 82 connects the inner cavity of the fourth annular housing 81 . It is divided into a fourth left air cavity and a fourth right air cavity, and the fourth left air cavity and the fourth right air cavity are connected with a fourth air pump, and the fourth left air cavity and the fourth right air cavity are filled by the fourth air pump The air release can drive the fourth annular piston 82 to move left and right, and the small diameter end of the fourth annular piston 82 penetrates the inner cavity of the fourth annular housing 81 and protrudes from the annular plate 85 side.

Each sliding plug 84 is also hinged with the small diameter end of the fourth annular piston 82 through a hinge rod 83 respectively, that is, one end of each hinge rod 83 is hinged with a sliding plug 84 and the other end is hinged with the small diameter end of the fourth annular piston 82 .

As shown in FIG. 7 , when the fourth air pump inflates the fourth right air chamber, the fourth annular piston 82 can be pushed to move to the left, and then the plurality of hinge rods 83 can drive each sliding latch 84 outward along the corresponding guide rail. Expanding and moving, and inserting each sliding pin 84 into the corresponding slot 611, can realize the locking between the turn-up rod base 61 and the second positioning device 8, and then realize the turn-up rod group 6 and the shaft sleeve 11. And the positioning of the second positioning device 8 has a self-centering effect, which can ensure that the turn-up lever group 6 always has the same initial position on the corresponding shaft sleeve 11. When the fourth air pump inflates the fourth left air cavity, the fourth annular piston 82 can be pushed to move to the right, and then the sliding pins 84 are driven to move inwardly along the corresponding guide rails through the plurality of hinge rods 83, and make each The sliding pins 84 are pulled out from the corresponding slots 611 to release the lock between the turn-up lever base 61 and the second positioning device 8, and then release the lock between the turn-up lever group 6 and the shaft sleeve 11; The turn-up lever group 6 can move relative to the shaft sleeve 11 , which provides conditions for the turn-up lever group 6 to perform the turn-up operation.

The working principle of this embodiment is as follows: when working, first install the unvulcanized tire 10 between the two sets of side drums 1 and lock it with the two tire support mechanisms 12, and adjust the second positioning device 8 to be in a locked state (that is, to make the phase The nut 4, the connecting key 5, the second positioning device 8, the side drum 1, the locking device 9 and the turn-up rod group 6 are relatively fixed), and the locking device 9 is in the unlocked state (that is, the phase Unlock between the side drum 1 and the hollow spindle 2 used together), the servo motor drives the lead screw 3 to rotate, and then drives the two lead nuts 4 to move on and off (even if the two lead nuts 4 move synchronously toward each other or move oppositely) , because the second positioning device 8 is in the locked state, the two sets of connecting keys 5 will synchronously drive the two sets of side drums 1 and the two sets of turn-up rod groups 6 along the respective guide grooves 21 to move together with the two nut 4 to Adjust the distance between the two tire support mechanisms 12 to complete the flat-width adjustment of the unvulcanized tire 10; then adjust the second positioning device 8 to be in an unlocked state, and make the locking device 9 in a locked state, and the servo motor drives the lead screw 3 rotate, and then drive the two nut 4 to move on and off. Since the second positioning device 8 is in the unlocked state, the two sets of connection keys 5 will synchronously drive the two sets of turn-up rod groups 6 along the respective guide grooves 21. The two nut 4 move together, and each turn-up bar 62 in the two sets of turn-up bar sets 6 will swing along the turning point on the corresponding turn-up bar base 61, and make the turn-up roller 63 on the unvulcanized tire. Both sides of the tire 10 are rolled to complete the turn-up operation of the unvulcanized tire 10 .

To sum up, the content of the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can propose other embodiments within the technical guidance of the present invention, but these embodiments are all included in the present invention. within the range.

Claims

A single-screw servo turn-up mechanical forming drum, comprising a side drum, a hollow spindle, a lead screw, a servo motor, a screw nut, a turn-up rod group, a connection key and a locking device, the side drums are two sets and slide symmetrically It is sleeved on the hollow main shaft and used to lock the unvulcanized tire. The screw coaxially penetrates the hollow main shaft and is driven by the servo motor to rotate. There are two screw nuts with opposite directions of rotation. Symmetrical transmission is connected on both sides of the lead screw, the set of turn-up rods is two sets and is symmetrically sleeved on the two sets of the side drums in one-to-one correspondence and is used to realize the turn-up operation of the unvulcanized tire, There are two sets of the connecting keys and are used to realize the one-to-one connection between the two threaded nuts and the two sets of the turn-up rod groups, and the locking devices are two sets and are symmetrically installed in the two sets of the two sets. on the side drum and used to realize the locking between the two sets of the side drum and the hollow main shaft; it is characterized in that,

Each of the locking devices respectively comprises a second annular casing, a second annular piston, a second steel ball, a wedge sleeve and a bearing bush;

In the same locking device, the second annular casing is slidably sleeved on the hollow main shaft and is fixedly connected with a shaft sleeve of the side drum, and the inner wall of the second annular casing is also open has an annular opening;

In the same locking device, the second annular piston is slidably mounted inside the second annular housing and divides the inner cavity of the second annular housing into a second left air cavity and a second right air cavity , the second left air cavity and the second right air cavity are both connected with a second air pump, and a second annular piston cone surface is also formed on the inner wall of the second annular piston;

In the same locking device, there are a plurality of the bearing bushes and are evenly distributed on the outer wall of the hollow main shaft in the circumferential direction, the number of the wedge bushes is two, and the two wedge bushes and the plurality of the bearing bushes are also arranged is inserted into the annular opening of the second annular casing, and the two wedge sleeves are respectively pressed on the conical surfaces of the bearing bushes on both sides of the outer wall of each of the bearing bushes by using the inner conical surfaces of the wedge sleeves on their respective inner walls. A wedge sleeve side tapered surface is also formed on one side of the wedge sleeve, and an annular groove is also formed between the wedge sleeve side tapered surface and the side wall of the annular opening;

In the same locking device, a plurality of the second steel balls are uniformly distributed between the annular groove and the second annular piston conical surface in the circumferential direction;

In the same locking device, the second annular piston is driven by the second air pump to slide in the second annular housing; each of the second steel balls is squeezed by the conical surface of the second annular piston move, and push the two wedge sleeves to jointly squeeze each of the bearing bushes to hold the hollow main shaft tightly; or release the extrusion of each of the second steel balls, thereby releasing the two wedge sleeve pairs Extrusion of the bearing shell to release the hollow main shaft.
The single-screw servo turn-up mechanical forming drum according to claim 1, wherein each of the locking devices further comprises two elastic rubber rings, and in the same locking device, each of the locking devices further comprises two elastic rubber rings. The outer side of the bearing bush is respectively provided with a wing plate, and the two elastic rubber rings are in a state of expanding outward and are separated on the inner side of the wing plate of each of the bearing bushes, so as to be driven when the hollow main shaft is released. Each of the bearing pads releases the hollow main shaft.
The single-screw servo turn-up mechanical forming drum according to claim 1, further comprising two sets of symmetrically arranged first positioning devices, each of which is respectively sleeved on one of the side drums , and each of the first positioning devices is also connected with a set of turnbuckles through the connecting key, and each of the first positioning devices respectively includes a third annular casing, a third annular piston and a third steel ball;

In the same first positioning device, the third annular casing is slidably fitted on the shaft sleeve of the side drum, and the inner wall of the third annular casing is also provided with a plurality of circular holes evenly distributed in the circumferential direction ;

In the same first positioning device, the third annular piston is slidably mounted inside the third annular casing and divides the inner cavity of the third annular casing into a third left air chamber and a third right air chamber The third left air chamber and the third right air chamber are both connected with a third air pump, and the inner wall of the third annular piston is also formed with a third annular piston cone;

In the same first positioning device, a plurality of the third steel balls are installed in the plurality of the circular holes in a one-to-one correspondence, and the shaft sleeve of each of the side drums is also provided with a plurality of circumferentially evenly distributed a plurality of conical grooves, and a plurality of the conical grooves and a plurality of the third steel balls are used in a one-to-one correspondence, and the plurality of the third steel balls are also arranged on the third annular piston conical surface and the third steel ball. between the outer walls of the corresponding shaft sleeves or between the third annular piston conical surface and each of the conical grooves;

In the same first positioning device, the third annular piston is driven by the third air pump to slide in the third annular casing; each of the third steel balls is moved by the conical surface of the third annular piston Press into the corresponding conical groove, so that each of the third steel balls is pressed between the third annular piston cone surface and the corresponding conical groove, so that the first positioning device lock on the corresponding shaft sleeve, thereby realizing the locking of the shaft sleeve and the corresponding turn-up rod group; or release the extrusion of each of the third steel balls, and when the first positioning device is in When the corresponding connecting key slides along the corresponding shaft sleeve, each of the third steel balls rolls from the corresponding conical groove to the outer wall of the corresponding shaft sleeve, so that each The third steel ball is pressed between the third annular piston cone surface and the corresponding outer wall of the shaft sleeve to release the locking between the first positioning device and the corresponding shaft sleeve, and then Release the lock between the bushing and its corresponding turn-up lever group.
The single-screw servo turn-up mechanical forming drum according to claim 3, wherein the outer wall of the third annular casing in each of the first positioning devices is further provided with a plurality of supporting grooves in the circumferential direction, respectively. In the same first positioning device, each of the supporting grooves is used to support each turn-up bar in the corresponding turn-up bar group in a one-to-one correspondence.
The single-screw servo turn-up mechanical forming drum according to claim 1, further comprising two sets of second positioning devices, the two sets of second positioning devices are respectively sleeved on the hollow main shaft symmetrically, and Each of the second positioning devices is also fixedly connected with one of the shaft sleeves, and each of the second positioning devices respectively comprises a fourth annular casing, a fourth annular piston, a hinge rod and a sliding latch;

In the same second positioning device, the fourth annular casing is slidably sleeved on the hollow main shaft, one end of the fourth annular casing is formed with an inner cavity, the other end is provided with an annular plate, and the annular A plurality of radially arranged guide rails are evenly distributed on the side end surface of the board, and each of the guide rails is slidably installed with a sliding pin, and each sliding pin is used in cooperation with a slot, wherein a plurality of the sliding pins are respectively used. The slots are uniformly distributed in the circumferential direction and formed on the inner wall of the end of the turn-up bar base of the turn-up bar group;

In the same second positioning device, the fourth annular piston is a sleeve-like structure with a stepped outer wall, the fourth annular piston is slidably mounted on the fourth annular housing, and the fourth annular piston is slidably mounted on the fourth annular housing. The large diameter end of the piston divides the inner cavity of the fourth annular casing into a fourth left air cavity and a fourth right air cavity, and both the fourth left air cavity and the fourth right air cavity are connected to a fourth air pump. connected, the small diameter end of the fourth annular piston penetrates the inner cavity of the fourth annular housing and protrudes out to one side of the annular plate;

In the same second positioning device, each of the sliding latches is respectively hinged with the small diameter end of the fourth annular piston through one of the hinge rods;

In the same second positioning device, the fourth annular piston is driven by the fourth air pump to slide on the fourth annular housing, so as to drive each of the sliding pins to radially move along the corresponding guide rails. move upward and downward, and then insert each of the sliding pins into the respective corresponding slots or pull out each of the sliding pins from the respective corresponding slots, so as to realize the turn-up bar set and the corresponding locking or unlocking between the bushings.
The single-screw servo turn-up mechanical forming drum according to claim 1, wherein each of the side drums respectively includes a bushing and a tire support mechanism, and each tire support mechanism includes a first annular casing, a tire support mechanism, and a tire support mechanism. a first annular piston, a connecting rod and a lock block;

In the same side drum, the shaft sleeve is slidably sleeved on the hollow main shaft;

In the same side drum, the first annular casing is fixedly connected with the shaft sleeve, and a guide ring groove is also opened on the outer wall of the first annular casing;

In the same side drum, the first annular piston is slidably installed inside the first annular casing and divides the inner cavity of the first annular casing into a first left air chamber and a first right air chamber, The first left air chamber and the first right air chamber are both connected with a first air pump;

In the same side drum, there are a plurality of the lock blocks and are evenly distributed in the guide ring groove in the circumferential direction, and each of the lock blocks is respectively hinged with the first annular piston through a connecting rod;

In the same side drum, the first annular piston is driven by the first air pump to slide in the first annular casing, so as to drive each of the locking blocks to expand radially along the guide ring groove retraction movement to achieve locking or unlocking of the unvulcanized tire.
The single-screw servo turn-up mechanical forming drum according to claim 6, wherein the hollow main shaft and the two shaft sleeves are provided with guide grooves for the connecting keys to pass through, and each of the One end of the connecting key is fixedly connected with the corresponding thread nut, and the other end is fixedly connected with a turn-up rod base.
The single-screw servo turn-up mechanical forming drum according to claim 7, wherein each turn-up bar group comprises the turn-up bar base and a plurality of circumferentially evenly distributed around the hollow main shaft. A turn-up rod, each of the turn-up rod bases is slidably sleeved on the corresponding shaft sleeve, one end of each of the turn-up rods is hinged with the corresponding turn-up rod base, and the other end is installed There is an anti-pack roller.