Tread feeding, centering and conveying mechanism and control method thereof

Abstract

The invention discloses a tread feeding and centering conveying mechanism and a control method thereof, the centering conveying mechanism comprises a conveying belt, a bottom frame is arranged below the input end of the conveying belt, a synchronous belt assembly comprising a synchronous belt is arranged on the bottom frame, and a pressing block and a pressing plate are arranged on the belt surfaces of the two sides of the synchronous belt respectively; the driving cylinder is arranged on the adjacent side of the synchronous belt; a movable push rod is connected with the pressing block; the left roller frame and the right roller frame are the same in structure, are arranged on the two sides of the conveying belt in an axial symmetry structure and are arranged in a sliding mode in the vertical direction of the synchronous belt through guide rail sliding blocks located on the two sides of the synchronous belt, and a pneumatic guide rail lock is arranged on one guide rail. A plurality of mushroom head rollers which are propped against the slopes on the two sides of the tread rubber are arranged on the roller frames on the two sides; according to the tread feeding, centering and conveying mechanism and the control method thereof, it can be ensured that the relative position of a tread rubber material is fixed after the tread rubber material is conveyed in place, it is ensured that the clamping position is kept after the tread rubber material is clamped, centering precision is ensured, and meanwhile clamping deformation of the tail end of the tread rubber material is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of tread rubber material conveying, and in particular to a tread material centering conveying mechanism and a control method thereof. Background Art

[0002] In the tread feeding process of the existing all-steel radial building machine, it is necessary to add an auxiliary conveying mechanism with a centering function on the tread rubber material conveyor belt to ensure the centering accuracy of the tread rubber material during transportation. Conventional tread feeding centering mechanisms mostly use roller frames on both sides of the tread rubber material, and free-rolling rollers on the roller frames. The roller frames on both sides of the tread rubber material are driven by cylinder pressure to tightly clamp the two sides of the tread rubber material, thereby ensuring the accuracy of the tread during transportation.

[0003] However, the existing centering conveying method has the following problems in practical application: 1) The driving pressure of the cylinder comes from the air supply of an external air source, and the unstable pressure of the external air source will also lead to the instability of the driving pressure of the cylinder, resulting in the fact that the clamping position of the roller frames on both sides cannot be maintained in the optimal stable state from beginning to end during the tread rubber conveying process; 2) The conventional thickness of the all-steel tread is 15mm~35mm, and the tread rubber is hard in texture. When the tread rubber is conveyed to the tail section, the pressure applied by the roller frames on both sides of the tread rubber for clamping the tread rubber remains unchanged, and the rubber clamped between the roller frames on both sides becomes less and less, breaking the force balance between the tread rubber and the pressure applied by the roller frames, resulting in the deterioration of the support of the rubber itself. In the current state, the excessive clamping force of the roller frames on both sides of the centering mechanism causes the rubber to bulge and deform, affecting the subsequent length measurement and bonding.

[0004] Based on this, in order to solve the above problems, it is necessary to improve the structure of the tread material centering conveying mechanism and its corresponding control method to solve the above problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a tread material centering and conveying mechanism that solves the above-mentioned technical problems.

[0006] Another object of the present invention is to provide a control method implemented by using a tread feeding centering conveying mechanism.

[0007] To this end, the technical solution of the present invention is as follows: A tread feeding and centering conveying mechanism comprises a conveyor belt, a base frame is fixed below the input end of the conveyor belt, and a left roller frame, a guide rail assembly, a driving cylinder, a synchronous belt assembly, a right roller frame and a pneumatic guide rail lock are arranged on the base frame; wherein the synchronous belt assembly is centrally arranged on the base frame, and comprises a belt transmission mechanism formed by a first synchronous wheel, a second synchronous wheel and a synchronous belt, and pressure blocks and pressure plates are respectively arranged on the two side belt surfaces arranged in parallel on the synchronous belt; the driving cylinder is arranged in parallel on the adjacent side of the synchronous belt, and the rod end of its movable push rod is vertically fixed on the pressure block, so that the synchronous belt is driven by the telescopic movement of the movable push rod to drive the pressure block and the pressure plate to move toward or in the opposite direction; the guide rail assembly comprises at least one linear guide rail respectively arranged on both sides of the synchronous belt assembly, and two sliders capable of sliding freely along the moving direction of the pressure block and the pressure plate are arranged on the linear guide rail located on each side. ; The pneumatic guide rail lock is arranged on the linear guide rail located on one side; the left roller frame has the same structure as the right roller frame, and is arranged on both sides of the conveyor belt in an axially symmetrical structure; each side roller frame includes a support frame and a guide plate, the guide plate is horizontally arranged on one side above the belt surface of the conveyor belt along a direction perpendicular to the setting direction of the synchronous belt assembly, and the support frame is fixed on the bottom surface of the guide plate; the left roller frame is fixed to the pneumatic guide rail lock and each slider on the linear guide rails on both sides of the synchronous belt assembly through the support frame, and the right roller frame is fixed to each other slider on the linear guide rails on both sides of the synchronous belt assembly through the support frame; on the bottom surface of the plate body on one side of the inner edge of the guide plate of the roller frames on both sides, a number of freely rotating mushroom head rollers are arranged at intervals along the length direction of the guide plate, and the wheel body of each mushroom head roller can rest on the slopes on both sides of the tread rubber material on the conveyor belt.

[0008] Furthermore, the pressure block includes a connecting frame and a connecting plate; the connecting frame is composed of an inverted L-shaped plate and a toothed panel vertically fixed on the plate surface at one end of the inverted L-shaped plate, and the toothed surface of the toothed panel is arranged outward; the connecting plate is arranged in parallel on the adjacent side of the toothed panel, so that the toothed panel and the connecting plate are clamped on both sides of the belt surface of one side of the synchronous belt, and the connecting plate is connected and fixed to the toothed panel by at least two bolts and clamps the belt surface of the synchronous belt; a strip through hole matching the belt surface on the other side of the synchronous belt is opened in the middle part of the inverted L-shaped plate in the horizontal direction, so that the belt surface on the other side of the synchronous belt is passed through the strip through hole; a connecting shaft for connecting to a movable push rod of a driving cylinder is passed through and fixed on the plate surface near the other end of the inverted L-shaped plate.

[0009] Furthermore, on each side roller frame, a number of mushroom head rollers are arranged at equal intervals along the length direction of the guide plate; each mushroom head roller is partially protruded to the outside of the guide plate, and is freely rotatable through a roller shaft vertically fixed to the bottom surface of the guide plate to abut against a side slope of the tread rubber material.

[0010] Furthermore, the wheel body slope of each mushroom head roller is adapted to the slope of the slopes on both sides of the tread rubber material.

[0011] Furthermore, the tread feeding and centering conveying mechanism also includes a control mechanism; the control mechanism includes a controller, a proportional valve, a pressure regulating valve and a solenoid valve; wherein, the air hole connected to the retraction chamber of the driving cylinder is connected to the external air source through a first air supply pipeline, and a proportional valve is arranged on the first air supply pipeline; the air hole connected to the extension chamber of the driving cylinder is connected to the external air source through a second air supply pipeline, and a pressure regulating valve is arranged on the second air supply pipeline; the air inlet end of the pneumatic guide rail lock is connected to the external air source through a third air supply pipeline, and a solenoid valve is arranged on the third air supply pipeline; the controller is respectively connected to the proportional valve, the pressure regulating valve and the solenoid valve.

[0012] A tread rubber material control method implemented by the above-mentioned tread material centering conveying mechanism comprises the following steps: Before the tread rubber material is about to be in place, the controller opens the solenoid valve, and the external air source supplies air to the pneumatic guide rail lock to open it, so that the pneumatic guide rail lock is in a free sliding state on the linear slide rail; the controller controls the pressure regulating valve to supply air to the extension chamber of the driving cylinder at a fixed pressure, and at the same time, the controller controls the proportional valve to supply air to the retraction chamber of the driving cylinder at a pressure lower than the fixed pressure, so that the movable push rod of the driving cylinder is extended until the distance between the roller frames on both sides is greater than the width of the tread rubber material; After the tread rubber material is in place, the controller adjusts the air supply pressure of the proportional valve to be greater than the fixed pressure and adapted to the specifications of the incoming tread rubber material, so that the movable push rod of the driving cylinder retracts to the mushroom head rollers on the roller frames on both sides to clamp the tread rubber material on the slopes on both sides; The proportional valve continuously feeds back the air pressure in the air pipeline to the controller. When the pressure value stabilizes, it proves that the roller frames on both sides have moved into place and are clamped on both sides of the tread rubber. The controller closes the solenoid valve to cut off the air in the pneumatic guide rail lock to lock it in the current position of the linear guide rail, ensuring that the positions of the roller frames on both sides are fixed until the tread rubber material is delivered.

[0013] Compared with the existing technology, the tread feeding centering conveying mechanism and its control method can ensure that the relative position of the tread rubber is fixed after being conveyed to the right place, and ensure that the clamping position is maintained after the tread rubber is clamped, and there will be no additional holding force to deform the tread at the end. It can not only avoid the problem of insufficient centering accuracy caused by problems such as unstable air pressure, but also avoid the tread rubber being deformed by the centering mechanism when it is conveyed to the tail end. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the tread feeding centering conveying mechanism of the present invention; Figure 2 It is a top view of the tread feeding centering conveying mechanism of the present invention (without the roller frames on both sides installed); Figure 3 It is a structural schematic diagram of a pressing block in a synchronous belt assembly of a tread feeding and centering conveying mechanism of the present invention; Figure 4 It is a pneumatic control schematic diagram of the tread feeding centering conveying mechanism of the present invention; Figure 5 This is a schematic diagram of the tread material centering conveying mechanism of the present invention being installed on the tread rubber material conveying mechanism. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way.

[0016] See also Figure 5 The tread feeding centering conveying mechanism includes a conveyor belt, and the conveyor belt includes a first conveying part 10 and a second conveying part 11 connected in sequence. Specifically, the first conveying part 10 adopts a Rifle wheel conveying mechanism to facilitate adjustment of the conveying position of the tread feeding to achieve a centering setting; the second conveying part 11 adopts a roller conveying mechanism to maintain the centering position of the tread feeding after centering and convey it; the first conveying part 10 serves as the input end of the conveyor belt, and is provided with a centering adjustment mechanism 9 for centering the tread rubber material thereon.

[0017] See also Figure 1 and Figure 2 The centering adjustment mechanism 9 includes a base frame 8 horizontally arranged below the first conveying part 10, and the base frame 8 is specifically fixed on the frame body of the first conveying part 10; the base frame 8 is provided with a left roller frame 2, a guide rail assembly 3, a driving cylinder 4, a synchronous belt assembly 5, a right roller frame 6 and a pneumatic guide rail lock 7.

[0018] The synchronous belt assembly 5 is centrally arranged on the base frame 8, and includes a first synchronous wheel 501 and a second synchronous wheel 502 arranged at intervals along the center line of the base frame 8, and a ring-shaped synchronous belt 505 is sleeved on the outside of the two synchronous wheels, so that the first synchronous wheel 501, the second synchronous wheel 502 and the synchronous belt 505 form a belt transmission mechanism; pressure blocks 503 and pressure plates 504 are respectively arranged on the two side belt surfaces of the synchronous belt 505 which are arranged in parallel.

[0019] See also Figure 3The pressing block 503 includes a connecting frame 5031 and a connecting plate 5032; wherein the connecting frame 5031 is composed of an inverted L-shaped plate and a toothed plate fixed vertically on the plate surface at one end of the inverted L-shaped plate, and the toothed plate is arranged with one side of the toothed surface facing outward; the connecting plate 5032 is arranged parallel to the adjacent side of the toothed plate, and is clamped on both sides of the belt surface of the synchronous belt 505 with the toothed plate, and the two are detachably connected and fixed by two bolts 5035 arranged at intervals, and the belt surface of the synchronous belt 505 is clamped, so that one end of the pressing block 503 is fixed on the synchronous belt 505; a strip through hole 5033 is opened in the middle of the inverted L-shaped plate in the horizontal direction, so that the belt surface of the other side of the synchronous belt 505 is passed through the strip through hole 5033, which plays a guiding and limiting role; a connecting shaft 5034 is vertically passed and fixed on the plate surface near the other end of the inverted L-shaped plate, so as to be connected with the movable push rod of the driving cylinder 4. The pressing plate 504 is fixed on the belt surface on the other side in a manner that its plate surface is parallel to the belt surface.

[0020] The driving cylinder 4 is arranged on the adjacent side of the synchronous belt 505 in a manner parallel to the synchronous belt 505; wherein, the cylinder barrel of the driving cylinder 4 is fixed on the base frame 8 through a support frame, and its movable push rod is arranged in the direction of the pressure block 503, and is coaxially arranged with the connecting shaft 5034 on the connecting frame 5031, so that the connecting shaft 5034 is connected to the rod end of the movable push rod of the driving cylinder 4 through a coupling. In actual application, the movable push rod of the driving cylinder 4 performs telescopic movement to synchronously drive the pressure block 503 to move accordingly. Since the pressure block 503 is fixed on the synchronous belt 505, when the pressure block 503 moves, the synchronous belt 505 and the pressure plate 504 fixed thereon also move synchronously, so that the driving cylinder 4 drives the pressure block 503 and the pressure plate 504 to move towards each other or in the opposite direction at the same time.

[0021] The guide rail assembly 3 includes a first linear guide rail 301, a second linear guide rail 303 and a third linear guide rail 305; the first linear guide rail 301 and the second linear guide rail 303 are arranged side by side on one side of the synchronous belt assembly 5 in a manner parallel to the synchronous belt 505, and the second linear guide rail 303 and the synchronous belt 505 are arranged adjacent to each other; the third linear guide rail 305 is arranged on the other side of the synchronous belt assembly 5 in a manner parallel to the synchronous belt 505; a first slider 302 is slidably arranged on the first linear guide rail 301, and a first slider 302 is slidably arranged on the second linear guide rail 303. A second slider 304 is movably provided, and two third sliders 306 are slidably provided on the third linear guide 305; wherein, the first slider 302 and one third slider 306 are arranged opposite to each other in a direction perpendicular to the linear guide, and the second slider 304 and another third slider 306 are arranged opposite to each other in a direction perpendicular to the linear guide; the pneumatic guide lock 7 is movably provided on the first linear guide 301; each slider and the pneumatic guide lock 7 can respectively move back and forth on the linear guide where it is located along the moving direction of the pressure block 503 and the pressure plate 504.

[0022] In the structural design of the guide rail assembly 3, since the base frame 8 is installed on the input end of the tread rubber conveying mechanism and its size is relatively small, two linear guide rails are set on one side of the synchronous belt assembly 5 to distribute the sliders used to guide the roller frames on both sides on one side; at the same time, a pneumatic guide rail lock 7 is installed on the linear guide rail close to the outer edge of the base frame 8 to facilitate assembly.

[0023] The left roller frame 2 includes a support frame and a guide plate; wherein the support frame includes a horizontally arranged fixed plate, which is horizontally arranged along a direction perpendicular to the setting direction of the synchronous belt assembly 5 (or the guide rail assembly 3), and its bottom surface is fixed on the top surfaces of the pneumatic guide rail lock 7, the pressure plate 504, and the second slider 304 and a third slider 306 which are arranged opposite to each other; two vertical plates are symmetrically arranged on the top surface of the fixed plate, so that the top end of the support frame extends from the base frame 8 to the upper side of the left edge of the first conveying part 10; the guide plate is fixed on the top surfaces of the two vertical plates in a manner parallel to the fixed plate; on the bottom surface of the guide plate near the inner edge, a plurality of mushroom head rollers 1 are arranged at equal intervals along the length direction of the guide plate, and each mushroom head roller 1 is arranged to be freely rotatable through a roller shaft vertically fixed on the bottom surface of the guide plate in a manner of partially protruding out of the guide plate.

[0024] The right roller frame 6 has the same structure as the left roller frame 2, and is arranged on both sides of the first conveying part 10 in an axially symmetrical structure with the left roller frame 2; wherein, the support frame of the right roller frame 6 is fixed to the connecting frame 5031 and the top surfaces of the first slider 302 and the other third slider 306 which are arranged opposite to each other through its fixing plate; furthermore, a linkage mechanism is formed between the roller frames on both sides and the guide rail slider and the synchronous belt assembly, and the synchronous relative movement and reverse movement of the pressure block 503 and the pressure plate 504 on the synchronous belt assembly are controlled to achieve the control of the synchronous relative movement and reverse movement of the roller frames on both sides.

[0025] On the roller frames on both sides, several mushroom head rollers 1 on the guide plate of the right roller frame 6 and several mushroom head rollers 1 on the left roller frame 2 are arranged in a one-to-one correspondence, so as to be symmetrically clamped on both sides of the tread rubber material, and preferably abut against the middle position of the slope surfaces on both sides of the tread rubber material.

[0026] As a preferred technical solution of this embodiment, the wheel slope of the mushroom head roller 1 is adapted to the slope of the slopes on both sides of the tread rubber material to increase the contact area between the mushroom head rollers 1 on both sides of the roller frames and the slopes on both sides of the tread rubber material, thereby improving the centering accuracy.

[0027] In actual applications, for tread rubber materials with different thicknesses and widths, the optimal pressures applied to the two sides of the tread rubber materials by the roller frames on both sides to achieve effective centering are different; at the same time, the clamping of the tread rubber materials by the roller frames on both sides is a process that needs to be maintained for a long time, and the air supply pressure of the external air source to the driving cylinder 4 is difficult to ensure stable air supply from beginning to end; therefore, in order to further improve the stability and centering accuracy of the centering process, the centering adjustment mechanism 9 also includes a control mechanism.

[0028] See also Figure 4 , the control mechanism includes a controller, a proportional valve, a pressure regulating valve and a solenoid valve; wherein, The cylinder of the driving cylinder 4 is provided with two air holes, one of which is connected to the retraction chamber of the cylinder so that the movable push rod can be retracted inward by supplying air to the air hole, and the other air hole is connected to the extension chamber of the cylinder so that the movable push rod can be extended outward by supplying air to the air hole; the air hole connected to the retraction chamber of the driving cylinder 4 is connected to an external air source through a first air supply pipeline, and a proportional valve is provided on the first air supply pipeline to adjust the gas pressure in the first air supply pipeline through the proportional valve, and the proportional valve also has the function of feeding back the gas pressure in the first air supply pipeline; the air hole connected to the extension chamber of the driving cylinder 4 is connected to an external air source through a second air supply pipeline, and a pressure regulating valve is provided on the second air supply pipeline to set the gas in the second air supply pipeline to be transported at a fixed pressure through the pressure regulating valve; The air inlet end of the pneumatic guide rail lock 7 is connected to the external air source through the third air supply pipeline, and the third air supply pipeline is provided with an electromagnetic valve to control whether the external air source is delivered to the pneumatic guide rail lock 7 through the electromagnetic valve, so as to lock the pneumatic guide rail lock 7 in the position on the linear guide rail; since the pneumatic guide rail lock 7 is connected to the sliders and the pressure plate 504 on the other two guide rails through the roller frame, when the pneumatic guide rail lock 7 is in the locked state, the roller frames on both sides and the synchronous belt assembly are kept in the locked state, even if the length of the tread rubber material between the roller frames on both sides is gradually reduced, the roller frames on both sides will no longer be adjusted in position by the force of the driving cylinder 4, and there will be no problem of the roller frames on both sides squeezing the tread rubber material to bulge; The controller is connected to the proportional valve, the pressure regulating valve and the electromagnetic valve respectively, wherein the controller drives the opening and closing of the electromagnetic valve to control the switching of the start guide rail lock between the free sliding state and the locking state; the controller controls the pressure regulating valve to open, and delivers gas to the extension chamber of the driving cylinder 4 at a fixed air pressure; at the same time, the controller controls the proportional valve to open, and delivers gas to the retraction chamber of the driving cylinder 4 according to the set air pressure (higher than the fixed air pressure or lower than the fixed air pressure) to control the active push rod of the driving cylinder 4 to extend outward or retract; the proportional valve also feeds back the air pressure in the pipeline to the controller, so that during the retraction process of the active push rod of the driving cylinder 4, when the air pressure in the pipeline reaches the optimal clamping pressure value, the controller drives the electromagnetic valve to close, and the pneumatic guide rail lock 7 is de-aired and locked on the linear guide rail, thereby keeping the roller frames on both sides at the optimal clamping position without change during the entire tread rubber material conveying process.

[0029] Among them, the optimal clamping force for achieving centering corresponding to tread rubber materials of different specifications is provided by the rubber material manufacturer and converted into the corresponding air supply pressure value in the control method, and the proportional valve is adjusted and set.

[0030] See also Figure 5 The tread rubber material control method implemented by the above-mentioned tread material centering conveying mechanism has the following specific control steps: In the initial state, that is, before the tread rubber material is about to be in place, the controller opens the solenoid valve, and the external air source supplies air to the pneumatic guide rail lock 7 to open, so that the pneumatic guide rail lock 7 is in a free sliding state on the linear slide rail; the controller controls the pressure regulating valve to supply air to the extension chamber of the driving cylinder 4 at a fixed pressure; at the same time, the controller controls the air supply pressure of the proportional valve to be less than the fixed pressure to supply air to the retraction chamber of the driving cylinder 4, so that the movable push rod of the driving cylinder 4 is extended until the distance between the roller frames on both sides is greater than the width of the tread rubber material; When the tread rubber material is in place at the conveying mechanism equipped with the centering mechanism, the controller adjusts the air supply pressure of the proportional valve to be greater than the fixed pressure and adapted to the incoming material specifications of the tread rubber material, so that the movable push rod of the driving cylinder 4 retracts to the mushroom head rollers 1 on the roller frames on both sides and clamps them on the slopes on both sides of the tread rubber material; The proportional valve continuously feeds back the air pressure in the air delivery pipeline to the controller. When the pressure value is stable, it proves that the roller frames on both sides are moved into position and clamped on both sides of the tread rubber material. The controller closes the solenoid valve to cut off the air of the pneumatic guide rail lock 7 to lock the current position of the linear guide rail, ensuring that the positions of the roller frames on both sides are fixed until the tread rubber material is delivered. After the tread rubber material is delivered, the controller opens the solenoid valve again and controls the air supply pressure of the proportional valve to be less than the fixed pressure. The roller frames on both sides return to the initial state where the width is greater than the tread rubber material, waiting for the next tread rubber material to arrive.

[0031] To sum up, the tread rubber centering mechanism and its control method can ensure that the tread rubber is relatively fixed in position after being delivered to the right place. It can not only avoid the problem of insufficient centering accuracy caused by problems such as unstable air pressure, but also avoid the tread rubber being clamped and deformed by the centering mechanism when it is delivered to the tail end.

Claims

1. A tread feeding and centering conveying mechanism, characterized in that: The invention comprises a conveyor belt, wherein a base frame (8) is fixed below the input end of the conveyor belt, and a left roller frame (2), a guide rail assembly (3), a driving cylinder (4), a synchronous belt assembly (5), a right roller frame (6) and a pneumatic guide rail lock (7) are arranged on the base frame (8); wherein the synchronous belt assembly (5) is centrally arranged on the base frame (8), and comprises a belt transmission mechanism formed by a first synchronous wheel (501), a second synchronous wheel (502) and a synchronous belt (505), and two side belts arranged in parallel on the synchronous belt (505) A pressure block (503) and a pressure plate (504) are respectively arranged on the surface; the driving cylinder (4) is arranged in parallel on the adjacent side of the synchronous belt (505), and the rod end of the movable push rod is vertically fixed on the pressure block (503), so that the synchronous belt (505) is driven by the telescopic movement of the movable push rod to drive the pressure block (503) and the pressure plate (504) to move towards or in the opposite direction; the guide rail assembly (3) includes at least one linear guide rail respectively arranged on both sides of the synchronous belt assembly (5), and two linear guide rails on each side are provided with The invention relates to a sliding block capable of sliding freely along the moving direction of the pressing block (503) and the pressing plate (504); a pneumatic guide rail lock (7) is arranged on a linear guide rail located on one side; the left roller frame (2) and the right roller frame (6) have the same structure and are arranged on both sides of the conveyor belt in an axisymmetric structure; each roller frame includes a support frame and a guide plate, the guide plate is horizontally arranged on one side above the belt surface of the conveyor belt along a direction perpendicular to the setting direction of the synchronous belt assembly (5), and the support frame is fixed on the bottom surface of the guide plate; the left roller frame (2) is connected to the conveyor belt by the support frame The right roller frame (6) is fixed to the pneumatic guide rail lock (7) and one slider on each of the linear guide rails on both sides of the synchronous belt assembly (5), and is fixed to the other slider on each of the linear guide rails on both sides of the synchronous belt assembly (5) through a support frame; on the bottom surface of the plate body on one side of the inner edge of the guide plate of the roller frames on both sides, a plurality of freely rotatable mushroom head rollers (1) are arranged at intervals along the length direction of the guide plate, and the wheel body of each mushroom head roller (1) can abut against the slopes on both sides of the tread rubber material on the conveyor belt.

2. The tread material centering conveying mechanism according to claim 1, characterized in that: The pressing block (503) includes a connecting frame (5031) and a connecting plate (5032); the connecting frame (5031) is composed of an inverted L-shaped plate and a toothed plate fixed vertically on an end plate surface of the inverted L-shaped plate, and the toothed surface side of the toothed plate is arranged outward; the connecting plate (5032) is arranged parallel to the adjacent side of the toothed plate, so that the toothed plate and the connecting plate (5032) are clamped on both sides of the belt surface of one side of the synchronous belt (505), and the connecting plate (5032) is fixed by at least two bolts. (5035) is connected to the tooth plate to fix and clamp the belt surface of the synchronous belt (505); a strip-shaped through hole (5033) is opened in the middle of the inverted L-shaped plate in the horizontal direction to match the belt surface of the other side of the synchronous belt (505), so that the belt surface of the other side of the synchronous belt (505) is inserted into the strip-shaped through hole (5033); a connecting shaft (5034) for connecting with the movable push rod of the driving cylinder (4) is inserted and fixed on the plate surface near the other end of the inverted L-shaped plate.

3. The tread material centering conveying mechanism according to claim 1, characterized in that: On each side of the roller frame, a plurality of mushroom head rollers (1) are arranged at equal intervals along the length direction of the guide plate; each mushroom head roller (1) is partially protruded to the outside of the guide plate and is freely rotatably arranged via a roller shaft vertically fixed to the bottom surface of the guide plate, so as to abut against a side slope of the tread rubber material.

4. The tread material centering conveying mechanism according to claim 1, characterized in that: The wheel body slope of each mushroom head roller (1) is adapted to the slope of the slope surfaces on both sides of the tread rubber material.

5. The tread material centering conveying mechanism according to claim 1, characterized in that: It also includes a control mechanism; the control mechanism includes a controller, a proportional valve, a pressure regulating valve and a solenoid valve; wherein the air hole communicated with the retraction chamber of the driving cylinder (4) is connected to an external air source via a first air supply pipeline, and a proportional valve is provided on the first air supply pipeline; the air hole communicated with the extension chamber of the driving cylinder (4) is connected to an external air source via a second air supply pipeline, and a pressure regulating valve is provided on the second air supply pipeline; the air inlet end of the pneumatic guide rail lock (7) is connected to an external air source via a third air supply pipeline, and a solenoid valve is provided on the third air supply pipeline; the controller is respectively connected to the proportional valve, the pressure regulating valve and the solenoid valve.

6. A control method implemented by using the tread material centering conveying mechanism as claimed in claim 5, characterized in that: Here are the steps: Before the tread rubber material is about to be in place, the controller opens the solenoid valve, and the external air source supplies air to the pneumatic guide rail lock (7) to open it, so that the pneumatic guide rail lock (7) is in a free sliding state on the linear slide rail; the controller controls the pressure regulating valve to supply air to the extension chamber of the driving cylinder (4) at a fixed pressure, and at the same time, the controller controls the proportional valve to supply air to the retraction chamber of the driving cylinder (4) at a pressure lower than the fixed pressure, so that the movable push rod of the driving cylinder (4) is extended until the distance between the roller frames on both sides is greater than the width of the tread rubber material; After the tread rubber material is in place, the controller adjusts the air supply pressure of the proportional valve to be greater than the fixed pressure and adapted to the specifications of the incoming tread rubber material, so that the movable push rod of the driving cylinder (4) retracts to the mushroom head rollers (1) on the roller frames on both sides to clamp the tread rubber material at the slopes on both sides; The proportional valve continuously feeds back the air pressure in the air delivery pipeline to the controller. When the pressure value stabilizes, it proves that the roller frames on both sides have moved into position and are clamped on both sides of the tread rubber material. The controller closes the solenoid valve to cut off the air in the pneumatic guide rail lock (7) to lock the current position of the linear guide rail, ensuring that the positions of the roller frames on both sides are fixed until the tread rubber material is delivered.

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