A molding mechanism for large and small head air spring

Abstract

The present invention provides a molding mechanism for large and small head air springs, comprising a main shaft; a fitting flat drum assembly sleeved at one end of the main shaft, a turn-up tile located on one side of the fitting flat drum assembly capable of closing to form a cylindrical shape having the same diameter as the fitting flat drum assembly; and a flaring assembly disposed on the main shaft, the flaring assembly capable of flaring the turn-up tile circumferentially overlapped at one end of the flaring assembly along the axial direction of the main shaft, driving the other end of the turn-up tile to rotate radially relative to the main shaft. The beneficial effects of the present invention are that large and small head air springs can be molded in one step without the need for a transmission mechanism; and by replacing fitting flat drums of different diameters, the turn-up drums of various sizes can be satisfied to realize the molding of large and small head air springs, and the structure is simple and the replacement difficulty is small.

Description

Technical Field

[0001] The invention relates to a molding mechanism for constructing an unvulcanized air spring by using a rubber component, in particular to a molding mechanism for a large and small head air spring. Background Art

[0002] The air spring (rubber airbag) is a fabric-sandwiched rubber bag filled with compressed air. It is a non-metallic spring that uses the compressibility of air to achieve its elastic effect. The large and small head air springs are mainly used on the axles of trucks and buses. The existing air spring molding process mainly adopts the secondary molding method. The molding process is divided into two stages. The first stage drum is a fitting flat drum, which is mainly used for the fitting of various rubber parts to form a straight cylindrical capsule tube, and then transmitted to the second stage by the transmission mechanism; the second stage drum is a capsule reverse drum, which is mainly used to buckle and reverse the two ends of the first stage formed capsule tube. For the molding of large and small head air springs, the second stage of the prior art also needs to set capsule reverse drums of various sizes to position, buckle and reverse the large and small steel wire rings respectively. It can be seen that the defects existing in the prior art are: on the one hand, the transmission mechanism is easy to cause deformation of the blastocyst; on the other hand, the second stage drum needs to set reverse drums of various sizes, which has a complex structure and is difficult to replace. Summary of the invention

[0003] In order to solve the defects of the above-mentioned prior art, the present invention provides a forming mechanism for large and small head air springs, including a main shaft; a fitting flat drum assembly sleeved on one end of the main shaft, and the turn-up tile located on one side of the fitting flat drum assembly can be closed to form a cylindrical shape with the same diameter as the fitting flat drum assembly; and a flaring assembly arranged on the main shaft, and the flaring assembly can flare the turn-up tile circumferentially overlapped on one end of the flaring assembly along the axial direction of the main shaft, thereby driving the other end of the turn-up tile to rotate radially relative to the main shaft.

[0004] Furthermore, one end of the turned-up tile is overlapped on the front end of the flaring component, and the other end is rotatably fixedly connected to the radial adjustment mechanism.

[0005] Furthermore, the flaring component slides axially on the main shaft, thereby changing the outer diameter of the turned-up tile overlapped at the front end of the flaring component after closing.

[0006] Preferably, the flaring component is a conical push plate (3) in the shape of a truncated cone and with a bottom surface perpendicular to the main shaft (1); a power device is fixedly provided at the cantilever end of the main shaft (1); and the conical push plate (3) is connected to the power device via a connecting rod (31).

[0007] Furthermore, the outer support slider (5) on the radial adjustment mechanism is rotatably fixedly connected to the turn-up tile (4), and the turn-up tile (4) can rotate around a rotation point. The outer support slider (5) can be radially adjusted in the guide groove of the support block guide groove (6) through a positioning component, thereby driving the turn-up tile (4) to change the diameter of the cylindrical shape formed by closing.

[0008] One or more technical solutions provided in the embodiments of the present invention have at least the following beneficial effects:

[0009] 1. Since the present invention adopts a one-step forming method, no transfer mechanism is required to transport the blastocyst formed by a drum in the prior art, thus overcoming the quality risk of the blastocyst being easily deformed by the transfer mechanism in the prior art.

[0010] 2. Since the present invention adopts a conical push plate structure and the rubber component is fitted with a flat drum assembly which is locked on the main shaft by a detachable locking device, it overcomes the problem in the prior art that the two-stage drum needs to be provided with a variety of sizes of turn-up drums to realize the molding of large and small head air springs, which has a complex structure and is difficult to replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the molding mechanism of the reducer and reducer air spring of the present invention, showing the state of the drum when the parts are fitted together;

[0012] Figure 2 It is a structural schematic diagram of the forming mechanism of the large and small head air spring of the present invention, showing the bulging state of the large head wire ring when it is buckled;

[0013] Figure 3 It is a structural schematic diagram of the radial adjustment mechanism in the present invention.

[0014] In the figure: main shaft 1, cylinder 2, cone push plate 3, connecting rod 31, turn-up tile 4, hinge 41, rubber ring belt 42, outer support slider 5, positioning threaded hole 51, support block guide groove 6, positioning bolt 61, fitting flat drum 7, positioning platform 71. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1As shown, the present invention provides a molding mechanism for large and small head air springs formed in one step, including a horizontally arranged main shaft 1, and a cylinder 2 is fixedly provided at the cantilever end of the main shaft 1 for providing power to a conical push plate 3. The conical push plate 3 can be made of wear-resistant engineering plastics, which can reduce the weight of the conical push plate 3 and reduce the cost. The conical push plate 3 is in a truncated cone shape and the upper and lower bottom surfaces are perpendicular to the main shaft. The end with a smaller circular area of ​​the conical push plate is its front end, and the end with a larger circular area of ​​the conical push plate is its rear end. The rear end of the conical push plate 3 is connected to the cylinder 2 through a connecting rod 31, so that the conical push plate 3 can move axially forward and backward on the main shaft 1. The front end of the conical push plate 3 is circumferentially overlapped with an inverted tile 4. The inverted tile 4 includes a plurality of arc-shaped tiles. One end of the turn-up tile 4 is circumferentially overlapped at the front end of the cone push plate 3, and a deformable rubber ring 42 is used to constrain the overlapped portion. When the cone push plate 3 slides axially on the main shaft 1, the turn-up tile 4 attached to the front end of the cone push plate 3 closes to form a cylindrical shape, and the outer diameter changes accordingly. The other end of the turn-up tile 4 is fixedly connected to a detachable hinge 41 at one radial end of the outer support slider 5, and the turn-up tile 4 can rotate a certain angle around the hinge point.

[0017] In summary, it can be found that the conical push plate 3 is only a preferred embodiment of the present invention. Other structures such as an axially slidable support and retractable connecting rod, etc., as long as they can expand one end of the reversed tile 4, belong to the protection scope of the present invention.

[0018] like Figure 3 As shown, the support block guide groove 6 is fixedly arranged on the main shaft 1. The support block guide groove 6 and the multiple external support sliders 5 constitute a radial adjustment mechanism. The multiple external support sliders 5 are equal in number to the multiple arc-shaped tiles. The support block guide groove 6 is radially provided with multiple guide grooves, and the external support sliders 5 are installed in the guide grooves, and the number of the external support sliders 5 is equal to the guide grooves. The external support slider 5 is radially provided with multiple positioning threaded holes 51, which can adjust the radial position of the external support slider 5 in the support block guide groove 6 in conjunction with the positioning bolts 61. When the radial position of the external support slider 5 in the support block guide groove 6 is adjusted, the diameter of the cylindrical shape formed by the reversed tile 4 fixedly connected to the external support slider 5 by the hinge 41 also changes accordingly.

[0019] A rubber component fitting flat drum assembly is also provided after the radial adjustment mechanism on the main shaft 1. The rubber component fitting flat drum assembly is locked on the main shaft by a detachable locking device, which is convenient for replacing turn-up drums of different sizes. The rubber component fitting flat drum assembly is mainly composed of a fitting flat drum 7 and a positioning platform 71. The fitting flat drum 7 is a metal cylinder of a certain thickness, which is used for fitting of various rubber components. The positioning platform 71 is used for positioning and turning up the buckle ring of the small-head wire ring. The fitting flat drum 7 and the positioning platform 71 can be disassembled and installed separately. By replacing the fitting flat drum 7 of different diameters and lengths, the forming drums of air springs of different models and sizes can be met.

[0020] When forming an air spring with a smaller diameter, the present invention, in principle, only needs to replace the flat drum 7 with a smaller diameter. When the minimum diameter of the cylinder formed by the turn-up tiles 4 fixedly connected to the outer support slider 5 by the hinge 41 still does not match the diameter of the flat drum 7, it is necessary to replace the turn-up tiles 4 of a suitable size. When the cylinder diameter formed by the turn-up tiles 4 fixedly connected to the outer support slider 5 by the hinge 41 matches the diameter of the flat drum 7, the replaced turn-up tiles 4 are of the right size.

[0021] When forming an air spring with a larger diameter, the present invention, in principle, only needs to replace it with a fitting flat drum 7 with the same larger diameter. When the diameter of the cylinder formed by the folded turn-up tiles 4 is larger, which increases the gap between the turn-up tiles 4 and affects the quality of the air spring buckle ring and the turn-up, it is necessary to replace the turn-up tiles 4 with a suitable size. When the diameter of the cylinder formed by the folded turn-up tiles 4 fixedly connected to the outer support slider 5 by the hinge 41 matches the diameter of the fitting flat drum 7, and the gap between the turn-up tiles 4 is within a reasonable range, the size of the replaced turn-up tiles 4 is appropriate.

[0022] Here’s how it works:

[0023] like Figure 2 As shown, the big head wire ring is placed in a specific position, and the cone push plate 3 is powered by the cylinder 2 to slide forward along the horizontal main shaft 1 axially, and at the same time, the outer diameter of the cylinder formed by the reversed tile 4 attached to the front end of the cone push plate 3 is changed accordingly. The more the cone push plate 3 slides forward, the larger the outer diameter of the cylinder formed by the reversed tile 4 attached to the front end of the cone push plate 3 is, until the reversed tile 4 is close to the big head wire ring, the buckling and reverse of the big head wire ring can be completed.

[0024] By replacing the fitting flat drum 7 with different diameters and lengths and adjusting the radial position of the external support slider 5 in the guide groove of the support block guide groove 6, the diameter of the turned-up tile 4 fixedly connected to the external support slider 5 by a hinge is changed to match the diameter of the fitting flat drum 7. When the diameter of the turned-up tile 4 formed into a cylindrical shape is the same as the diameter of the fitting flat drum 7, air spring forming drums of different sizes are satisfied.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A molding mechanism for a large and small head air spring, characterized in that: include: spindle(1); A fitting flat drum assembly sleeved on one end of the main shaft (1); a turn-up tile (4) located on one side of the fitting flat drum assembly; the turn-up tile (4) comprises a plurality of arc-shaped tiles, the plurality of arc-shaped tiles are arranged circumferentially around the main shaft (1); one end of the turn-up tile (4) is overlapped on the front end of the flaring assembly, and the other end is rotatably fixedly connected to the radial adjustment mechanism; the turn-up tile (4) can be folded to form a cylindrical shape having the same diameter as the fitting flat drum assembly; as well as A flaring component is arranged on the main shaft (1), and the flaring component is capable of flaring the turn-up tile (4) circumferentially overlapped on one end of the flaring component along the axial direction of the main shaft (1), thereby driving the other end of the turn-up tile (4) to rotate radially relative to the main shaft (1).

2. The molding mechanism of the large and small head air spring according to claim 1 is characterized in that: The laminating flat drum assembly comprises a laminating flat drum (7) and a positioning platform (71) which are detachably connected to the main shaft (1); the laminating flat drum (7) is a metal cylindrical tube.

3. The molding mechanism of the large and small head air spring according to claim 1 is characterized in that: The flaring assembly slides axially on the main shaft (1).

4. The molding mechanism of the large and small head air spring according to claim 3 is characterized in that: The flaring component is a conical push plate (3) in the shape of a truncated cone and the bottom surface of which is perpendicular to the main shaft (1). A power device is fixedly arranged at the cantilever end of the main shaft (1), and the conical push plate (3) is connected to the power device via a connecting rod (31).

5. The molding mechanism of the reducer and reducer air spring according to claim 2, characterized in that: The radial adjustment mechanism is fixed on the main shaft (1), and comprises a plurality of external support sliders (5) and support block guide grooves (6), the number of the external support sliders (5) is equal to the number of the arc-shaped tiles, the support block guide grooves (6) are radially provided with a plurality of guide grooves, the external support sliders (5) are installed in the guide grooves, and the number of the external support sliders (5) is equal to the number of the guide grooves.

6. The molding mechanism of the reducer and reducer air spring according to claim 5, characterized in that: The outer support slider (5) on the radial adjustment mechanism is rotationally fixedly connected to the turn-up tile (4), and the turn-up tile (4) can rotate around a rotation point.

7. The molding mechanism of the reducer and reducer air spring according to claim 6, characterized in that: The outer support slider (5) can be radially adjusted in the guide groove of the support block guide groove (6) through a positioning assembly, thereby driving the change in the diameter of the reversed tile (4) that is closed to form a cylindrical shape.

8. The molding mechanism of the large and small head air spring according to claim 7, characterized in that: The outer support slider (5) is provided with a plurality of positioning threaded holes (51) in the radial direction, which cooperate with positioning bolts (61) to adjust the radial position of the outer support slider (5) in the guide groove.

9. The molding mechanism of the large and small head air spring according to claim 1, characterized in that: A deformable rubber ring (42) is sleeved on the reversed tile at a position close to the overlap with the flaring component.

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