CN112171985A

CN112171985A - Straight arm assembly

Info

Publication number: CN112171985A
Application number: CN202010872876.0A
Authority: CN
Inventors: 朱国才; 孙鹏飞; 向阳; 谭飞翔; 陈健; 江超杰
Original assignee: WENLING RISINGSUN ROTOMOLDING TECHNOLOGY CO LTD
Current assignee: WENLING RISINGSUN ROTOMOLDING TECHNOLOGY CO LTD
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-01-05

Abstract

The invention provides a straight arm assembly, and belongs to the technical field of parts of rotational molding machines. The problem that gas is easy to leak from a working arm of an existing rotational molding machine is solved. The invention relates to a straight arm assembly which comprises a straight arm mechanism and a connecting assembly. The first gas and the second gas are directly conveyed into the connecting assembly through the matching action of the straight arm mechanism and the connecting assembly, so that the use of an external gas pipe is avoided, and the gas leakage condition in the straight arm assembly is reduced in the process of collision between the straight arm assembly and external objects; secondly, carry the in-process in the coupling assembling with first gas and second gas simultaneously, straight arm mechanism rotates relative its central axis, and coupling assembling rotates relative its central axis to guarantee that the mould is in the in-process through the zone of heating or cooling zone, each face of mould is heated evenly or the cooling is even, and then improves rotational moulding technology's success rate.

Description

Straight arm assembly

Technical Field

The invention belongs to the technical field of rotational molding machine parts and relates to a straight arm assembly.

Background

The rotational molding machine is a plastic device for manufacturing hollow plastic products by plastic powder, and mainly drives a rotational molding die which is uniformly heated to rotate through a working arm, so that the plastic powder which is melted in the rotational molding die is uniformly coated and adhered to the whole inner surface of the rotational molding die under the action of gravity, thereby forming the rotational molding products, and then the rotational molding machine is cooled and shaped, and the finished products can be taken down after the die is opened.

When the rotational moulding machine carries out heat treatment to the mould, need install the mould on the work arm of rotational moulding machine, mould such as some dark chamber, because the unable quick transmission of heat, need external gas to guide heat to the mould surface on every side, in order to realize the local hot processing of mould, furthermore, this type of trachea people often tie up on the work arm with ribbon or rope, nevertheless, the work arm is in the use, very easily collide with external article, lead to tying up the trachea on the work arm and take place the damage, cause the gas in the trachea to reveal, can not guide the heat to the mould surface.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a straight arm assembly which is not easy to leak gas and has good stability.

The purpose of the invention can be realized by the following technical scheme: a straight arm assembly comprising:

the straight arm mechanism rotates around the central axis of the straight arm mechanism;

the connecting assembly is arranged at one end of the support arm mechanism and rotates around the central axis of the connecting assembly, and the central axis of the straight arm mechanism is vertical to the central axis of the connecting assembly;

the straight arm mechanism and the connecting component simultaneously pass through two gases.

In the above straight arm assembly, the straight arm mechanism includes a housing, a rotating pipe and an inner pipe, the rotating pipe is inserted into the housing, the inner pipe is inserted into the rotating pipe, and the rotating pipe rotates relative to the housing; the inner diameter of the rotating pipe is larger than the outer diameter of the inner pipe.

In foretell straight arm assembly, the one end of commentaries on classics pipe is equipped with the sprue, the sprue is passed to the inner tube, set up the closure hole that is used for wearing to establish the inner tube in the sprue, the aperture in closure hole is greater than the diameter of inner tube, be connected through first bearing between sprue and the shell.

In the above straight arm assembly, the blocking block is provided with a stop ring for positioning and mounting the inner pipe.

In foretell straight arm assembly, the spacing shell that is used for movable mounting coupling assembling can be dismantled and be connected with to the one end of shell, the sleeve pipe is installed to the commentaries on classics pipe one end that is close to spacing shell, the one end of interior sheathed tube one end and inner tube all inject in spacing shell.

In foretell straight arm assembly, the inside that the shell is close to spacing shell one end is equipped with and is used for connecting interior sheathed tube connector, the card is equipped with second bearing and first seal ring between connector and the interior sleeve pipe, the inboard and the outside of first seal ring all are equipped with two at least first sealing washers, the connector can be dismantled with spacing shell and be connected.

In the above straight arm assembly, a main helical gear is mounted at one end of the inner sleeve, a tube hole for penetrating the inner tube is formed in the inner sleeve, and the aperture of the tube hole is larger than the outer diameter of the inner tube.

In foretell straight arm assembly, coupling assembling wears to locate the axle of wearing in the spacing shell including the activity, the inside bottom of spacing shell is equipped with the spacing seat that is used for the installation to wear the axle, spacing seat and wear to be equipped with third bearing and second seal ring between the axle, the inside top of spacing shell and wear to be equipped with the fourth bearing between the axle, the inboard and the outside of second seal ring all are equipped with two at least second sealing washers, wear to overlap on the axle to be equipped with the vice helical gear with main helical gear meshing.

In foretell straight arm assembly, the intraductal first branch pipe of seting up with the tube hole UNICOM of endotheca, set up a plurality of second branch pipes with first branch pipe UNICOM in the first seal ring, set up third branch pipe and the fourth branch pipe with second branch pipe UNICOM in the connector, the third branch pipe passes through the intercommunication head with the fourth branch pipe and communicates, the intercommunication head can be dismantled and connect on the shell.

In the straight arm assembly, a fifth branch pipe communicated with the fourth branch pipe is arranged in the limiting shell, a sixth branch pipe communicated with the fifth branch pipe is arranged in the limiting seat, a plurality of seventh branch pipes communicated with the sixth branch pipes are arranged in the second seal ring, an outer air pipe and an inner air pipe are arranged in the penetrating shaft, an eighth branch pipe communicated with the outer air pipe and the seventh branch pipe is further arranged in the penetrating shaft, and an air inlet communicated with the inner air pipe and the limiting shell is further arranged in the penetrating shaft.

Compared with the prior art, the invention has the following beneficial effects:

1. through the cooperation of straight arm mechanism and coupling assembling for first gas and the gaseous direct transport of second avoid external tracheal use in to coupling assembling, so, reduced the in-process that straight arm assembly and external article bump, the gaseous emergence in the straight arm assembly reveals the condition.

2. In the invention, the first gas and the second gas can be simultaneously conveyed into the connecting component, so that the conveying efficiency of the rotational molding device to the gases is improved.

3. The quantity of the branch pipes through which the first gas passes is far greater than that of the branch pipes through which the second gas passes, and the first gas also needs to pass through the first sealing ring and the second sealing ring, so that the gas pressure of the first gas is higher than that of the second gas, namely, the first gas can be high-pressure gas, and the second gas can be low-pressure gas, so that the rotational molding device can convey the high-pressure gas and the low-pressure gas simultaneously.

4. In-process in carrying coupling assembling simultaneously with first gas and second gas, straight arm mechanism rotates for its central axis, and coupling assembling rotates for its central axis to guarantee that the mould is in the in-process through the zone of heating or cooling zone, each face of mould is heated evenly or the cooling is even, and then improves rotational moulding technology's success rate.

5. Through the setting of second sealing washer, effectively increased and worn the axle and spacing between the seat gas tightness, through the setting of first sealing washer, effectively increased interior sleeve pipe and connector between the gas tightness.

Drawings

Fig. 1 is a schematic structural view of a straight arm assembly.

Fig. 2 is a schematic view of the structure of fig. 1 from another view angle.

Fig. 3 is a cross-sectional view at a-a of fig. 2.

Fig. 4 is an enlarged view of fig. 3 at B.

Fig. 5 is an enlarged view of fig. 3 at C.

Fig. 6 is a schematic structural view of the limit case.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-6, a straight arm assembly of the present invention includes a straight arm mechanism and a connecting assembly.

In the present invention, the gas introduced into the outer joint 363 is referred to as a first gas, and the gas introduced into the inner joint 361 is referred to as a second gas.

The straight arm mechanism 300 rotates around the central axis thereof, the connecting assembly 400 is mounted at one end of the arm mechanism 300, the connecting assembly 400 rotates around the central axis thereof, and the central axis of the straight arm mechanism 300 is perpendicular to the central axis of the connecting assembly 400; the straight arm mechanism 300 and the connecting assembly 400 can simultaneously pass a first gas and a second gas, and when being installed, one needs to install two molds at both ends of the connecting assembly 400, and then control the apparatus suitable for the straight arm assembly to move the arm mechanism to the heating zone or the cooling zone, and then control the straight arm mechanism 300 to rotate with its own central axis, the connecting assembly 400 to rotate with its own central axis, the connecting member 400 is movably installed at one end of the straight arm mechanism 300, so that the connecting member 400 can rotate in a vertical plane while rotating in a horizontal plane, namely, the two moulds can rotate on the horizontal plane and also rotate on the vertical plane, thereby ensuring that the moulds can rotate on the horizontal plane or the vertical plane when passing through the heating zone or the cooling zone, each surface of the mold is uniformly heated or uniformly cooled, so that the success rate of the rotational molding process is improved.

Each straight arm mechanism 300 comprises a shell 310 movably arranged on equipment suitable for the general assembly of the straight arm, a rotating pipe 320 and an inner pipe 330, wherein the rotating pipe 320 is inserted in the shell 310, the inner pipe 330 is inserted in the rotating pipe 320, and the rotating pipe 320 rotates relative to the shell 310; at least two mounting hoops 311 are sleeved on the outer shell 310, a bearing (not labeled in the figure) is installed between each mounting hoop 311 and the outer shell 310, through the arrangement of the bearing, the outer shell 310 can rotate relative to the equipment suitable for the straight arm general assembly, the inner diameter of the rotating pipe 320 is larger than the outer diameter of the inner pipe 330, one end of the rotating pipe 320 is provided with a blocking block 340, the inner pipe 330 passes through the blocking block 340, a blocking hole 342 used for penetrating the inner pipe 330 is formed in the blocking block 340, the aperture of the blocking hole 342 is larger than the diameter of the inner pipe 330, the blocking block 340 is connected with the outer shell 310 through a first bearing 350, through the arrangement of the first bearing 350, the blocking block 340 can rotate relative to the outer shell 310, namely, the rotating pipe 320 rotates relative to the outer shell 310, an inner gear 343 is installed on the blocking block 340, an outer gear 312 is installed on the outer shell 310, an air inlet head 360 is installed on the blocking block 340, the inner pipe 330 is inserted in the air, the air inlet head 360 is internally provided with a connecting hole 362 for penetrating the inner pipe 330, the air inlet head 360 is provided with an outer joint 363 communicated with the connecting hole 362, the connecting hole 362 is communicated with a blocking hole 342, when the outer gear 312 rotates, because the outer gear 312 is installed on the shell 310, and the shell 310 is movably installed on equipment suitable for the straight arm general assembly through two installation hoops 311, the connecting assembly 400 is installed on one end of the shell 310, so that the connecting assembly 400 can circumferentially rotate along the central axis of the shell 310, when the inner gear 343 rotates, because the inner gear 343 is installed on the blocking block 340, the blocking block 340 is connected with the rotating pipe 320, the blocking block 340 is connected with the shell 310 through a first bearing 350, so that when the inner gear 343 drives the blocking block 340 to rotate, the rotating pipe 320 also rotates along with the inner gear 343, the rotation of the shell 310 is not influenced, further, because the inner pipe 330 penetrates through the blocking block 340, and the, the aperture of the connection hole 362 is larger than the outer diameter of the inner tube 330, so that when a person introduces a first gas into the outer joint 363, the first gas passes through the connection hole 362 and the blocking hole 342 in sequence until the first gas enters the rotating tube 320, and when a person introduces a second gas into the inner joint 361, the second gas directly enters the inner tube 330, so that the transmission of two different gases can be realized; secondly, the blocking piece 340 is provided with a stop ring for positioning and installing the inner pipe 330, when the blocking piece 340 is connected with the rotating pipe 320, people need to insert one end of the blocking piece 340 into the rotating pipe 320 until the stop ring supports against the rotating pipe 320, then the blocking piece 340 is in threaded connection with the rotating pipe 320, and then the inner pipe 330 passes through the blocking piece 340 and is inserted into the air inlet joint 360 until the inner pipe 330 is communicated with the inner joint 361.

One end of the outer shell 310 is detachably connected with a limit shell 370 for movably mounting the connecting assembly 400, one end of the rotating pipe 320 close to the limit shell 370 is provided with an inner sleeve 321, one end of the inner sleeve 321 and one end of the inner pipe 330 are inserted into the limit shell 370, a connector 380 for connecting the inner sleeve 321 is arranged inside one end of the outer shell 310 close to the limit shell 370, a second bearing 381 and a first seal ring 382 are clamped between the connector 380 and the inner sleeve 321, the connector 380 is detachably connected with the limit shell 370, when the outer shell 310 rotates, the outer shell 310 can drive the limit shell 370 to rotate due to the threaded connection between the limit shell 370 and the outer shell 310, that is, the stopper case 370 is implemented to be circumferentially rotated about the central axis of the outer case 310, and when the rotating pipe 320 is rotated, because the inner sleeve 321 is mounted at one end of the rotating tube 320, the connector 380 is connected with the inner sleeve 321 through the second bearing 381, so that the inner sleeve 321 can rotate relative to the connector 380.

One end of the inner sleeve 321 is provided with a main helical gear 321a, a pipe hole 321b for penetrating the inner pipe 330 is formed in the inner sleeve 321, the aperture of the pipe hole 321b is larger than the outer diameter of the inner pipe 330, the connecting assembly 400 comprises a penetrating shaft 410 movably penetrating the limiting shell 370, a limiting seat 420 for installing the penetrating shaft 410 is arranged at the bottom end of the inner part of the limiting shell 370, a third bearing 430 and a second sealing ring 440 are arranged between the limiting seat 420 and the penetrating shaft 410, a fourth bearing 450 is arranged between the top end of the inner part of the limiting shell 370 and the penetrating shaft 410, at least two second sealing rings 441 are arranged on the inner side and the outer side of the second sealing ring 440, an auxiliary helical gear 460 engaged with the main helical gear 321a is sleeved on the penetrating shaft 410, when the inner sleeve 321 drives the main helical gear 321a to rotate, because the auxiliary helical gear 460 is engaged with the main helical gear 321a, the auxiliary helical gear 460 is sleeved on the penetrating shaft 410, because one end of the through shaft 410 is movably mounted in the limiting seat 420 through the third bearing 430, and the other end of the through shaft 410 is movably mounted in the limiting shell 370 through the fourth bearing 450, the auxiliary bevel gear 460 can drive the through shaft 410 to rotate, that is, the through shaft 410 can rotate with the central axis of itself.

A first branch pipe 321c communicated with the pipe hole 321b is arranged in the inner sleeve 321, a plurality of second branch pipes 382b communicated with the first branch pipe 321c are arranged in the first seal ring 382, a third branch pipe 383 and a fourth branch pipe 384 communicated with the second branch pipes 382b are arranged in the connecting head 380, the third branch pipe 383 and the fourth branch pipe 384 are communicated through a communication head 390, the communication head 390 is detachably connected to the outer shell 310, a fifth branch pipe 371 communicated with the fourth branch pipe 384 is arranged in the limiting shell 370, a sixth branch pipe 421 communicated with the fifth branch pipe 371 is arranged in the limiting seat 420, a plurality of seventh branch pipes 442 communicated with the sixth branch pipe 421 are arranged in the second seal ring 440, an outer air pipe 411 and an inner air pipe 412 are arranged in the penetrating shaft 410, an eighth branch pipe 411a communicated with the outer air pipe 411 and the seventh branch pipe 442 is also arranged in the penetrating shaft 410, the outer side surface and the outer side surface of the second seal ring 440 are both recessed inward to form a second ring groove 443 communicated with the seventh branch pipe 442.

After the first gas enters the pipe hole 321b through the rotating pipe 320, because the first branch pipe 321c is communicated with the pipe hole 321b, the first branch pipe 321c, the second branch pipe 382b, the third branch pipe 383, the fourth branch pipe 384, the fifth branch pipe 371, the sixth branch pipe 421, the seventh branch pipe 442 and the eighth branch pipe 411a are sequentially communicated, so that the first gas can smoothly enter the outer gas pipe 411, and finally, the first gas is discharged from the outer gas pipe 411 to both ends of the penetrating shaft 410, specifically, the first seal ring 382 is arranged between the inner sleeve 321 and the connecting head 380, the outer side surface and the outer side surface of the first seal ring 382 are both recessed inwards to form a first ring groove 382c communicated with the second branch pipe 382b, so that the first gas discharged from the first branch pipe 321c can enter the second branch pipe 382b through the first ring groove 382c on the inner side surface of the first seal ring 382, and then, the first ring groove 382c on the outer side surface of the first seal ring 382 is introduced into the third branch pipe 383, therefore, when the inner sleeve 321 rotates relative to the connection head 380, even if the first seal ring 382 also rotates, the first gas can still enter the third branch 383 through the first annular groove 382c and the second branch 382b, and in addition, at least two first seal rings are arranged on the inner side and the outer side of the first seal ring 382, so that the airtightness between the inner sleeve 321 and the connection head 380 is effectively increased through the arrangement of the first seal rings, and the first gas can still enter the third branch 383 through the first annular groove 382c and the second branch 382 b; the communicating head 390 is detachably connected to the housing 310, specifically, a communicating pipe 391 for communicating the third branch pipe 383 with the fourth branch pipe 384 is arranged in the communicating head 390, so that the first gas entering the third branch pipe 383 can enter the fourth branch pipe 384 through the communicating pipe 391, a drain plug 392 is arranged right below the communicating head 390, when people maintain the straight arm mechanism 300, people can directly discharge the liquid in each branch pipe through the communicating head 390 only by pulling out the drain plug 392, and thus the operation of people is facilitated; the second seal ring 440 is disposed between the through shaft 410 and the retainer 420, and the outer side surface of the second seal ring 440 are both recessed inward to form a second annular groove 443 communicated with the seventh branch pipe 442, so that the first gas discharged from the sixth branch pipe 421 can enter the seventh branch pipe 442 through the second ring groove 443 on the outer side surface of the second seal ring 440, and thereafter, the second ring groove 443 on the inner side of the second seal ring 440 is inserted into the eighth branch pipe 411a, so that, when the through shaft 410 rotates relative to the stopper housing 370, even if the second seal ring 440 is rotated, the first gas can still enter the eighth branch pipe 411a through the second ring groove 443 and the seventh branch pipe 442, in addition, at least two second sealing rings 441 are arranged on the inner side and the outer side of the second sealing ring 440, due to the arrangement of the second sealing ring 441, the airtightness between the penetrating shaft 410 and the limiting seat 420 is effectively increased, and it is ensured that the first gas can still enter the eighth branch pipe 411a through the second ring groove 443 and the seventh branch pipe 442.

When the first gas is discharged through the outer gas pipe 411, the second gas in the inner pipe 330 is also discharged into the limiting shell 370, and because the through shaft 410 is further provided with a gas inlet hole communicating the inner gas pipe 412 and the limiting shell 370, the second gas in the limiting shell 370 enters the inner gas pipe 412 through the gas inlet hole and is discharged to the two ends of the through shaft 410 through the inner gas pipe 412.

Furthermore, the number of the branch pipes through which the first gas passes is much larger than the number of the branch pipes through which the second gas passes, and the first gas also passes through the first seal ring 382 and the second seal ring 440, so that the gas pressure of the first gas is higher than that of the second gas, that is, the first gas may be a high-pressure gas, and the second gas may be a low-pressure gas, so that the straight arm assembly can convey the high-pressure gas and the low-pressure gas at the same time.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A straight arm assembly, comprising:

2. The straight arm assembly as claimed in claim 1, wherein the straight arm mechanism comprises a housing, a rotating tube and an inner tube, the rotating tube is inserted into the housing, the inner tube is inserted into the rotating tube, and the rotating tube rotates relative to the housing; the inner diameter of the rotating pipe is larger than the outer diameter of the inner pipe.

3. The straight arm assembly according to claim 2, wherein a block is provided at one end of the rotating pipe, the inner pipe passes through the block, a block hole for passing the inner pipe is provided in the block, the diameter of the block hole is larger than that of the inner pipe, and the block is connected with the housing through a first bearing.

4. A straight arm assembly as claimed in claim 3 wherein said block is provided with a stop ring for locating and mounting the inner tube.

5. The straight arm assembly as claimed in claim 3, wherein one end of the outer casing is detachably connected with a limiting casing for movably mounting the connecting assembly, one end of the rotating pipe close to the limiting casing is provided with an inner sleeve, and one end of the inner sleeve and one end of the inner pipe are inserted into the limiting casing.

6. The straight arm assembly as claimed in claim 5, wherein a connector for connecting the inner sleeve is arranged inside one end of the housing close to the position-limiting shell, a second bearing and a first seal ring are clamped between the connector and the inner sleeve, at least two first seal rings are arranged on the inner side and the outer side of the first seal ring, and the connector is detachably connected with the position-limiting shell.

7. The straight arm assembly as claimed in claim 6, wherein the main bevel gear is mounted at one end of the inner sleeve, and the inner sleeve is provided with a hole for passing the inner tube, and the hole has a diameter larger than the outer diameter of the inner tube.

8. The straight arm assembly as claimed in claim 7, wherein the connecting assembly comprises a through shaft movably inserted into a limiting casing, a limiting seat for installing the through shaft is provided at the inner bottom end of the limiting casing, a third bearing and a second sealing ring are provided between the limiting seat and the through shaft, a fourth bearing is provided between the inner top end of the limiting casing and the through shaft, at least two second sealing rings are provided at the inner side and the outer side of the second sealing ring, and a secondary helical gear engaged with the primary helical gear is sleeved on the through shaft.

9. The straight arm assembly as claimed in claim 8, wherein the inner sleeve has a first branch pipe communicating with the pipe hole, the first seal ring has a plurality of second branch pipes communicating with the first branch pipe, the connector has a third branch pipe and a fourth branch pipe communicating with the second branch pipe, the third branch pipe and the fourth branch pipe are connected by a connection head, and the connection head is detachably connected to the housing.

10. The straight arm assembly according to claim 9, wherein a fifth branch pipe communicated with the fourth branch pipe is formed in the limiting shell, a sixth branch pipe communicated with the fifth branch pipe is formed in the limiting seat, a plurality of seventh branch pipes communicated with the sixth branch pipes are formed in the second seal ring, an outer air pipe and an inner air pipe are formed in the through shaft, an eighth branch pipe communicated with the outer air pipe and the seventh branch pipe is formed in the through shaft, and an air inlet hole communicated with the inner air pipe and the limiting shell is formed in the through shaft.