L-shaped arm of rotational molding machine

Abstract

The utility model discloses an L-shaped arm of a rotational molding machine, and relates to the field of plastic processing, a main shaft body is rotatably connected in a mounting seat, a main shaft gear is sleeved on the outer side of the main shaft body, a rotating rod is rotatably connected in the main shaft body, and one end of the main shaft body is rotatably connected with a main box girder; and one end of the rotating rod extends into the main box girder and is sleeved with a first gear disc. According to the L-shaped arm of the rotational molding machine, due to the fact that the main box girder can continuously rotate according to requirements and one side of the main box girder is heavy, under the condition that counterweight is not carried out, the side with the heavy weight can rotate due to inertia after driving is stopped, safety accidents are caused, and meanwhile the stability of the whole L-shaped arm in the using process is not met; and the internal space of the placement box can be partitioned by utilizing the longitudinal partition plate and the transverse partition plate, so that the balancing weight is conveniently and stably placed, and safety accidents caused by the problem that the balancing weight falls off in the rotating process are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic processing, in particular to an L-arm of a rotational molding machine. Background Art

[0002] Roto-molding machine is a kind of roto-molding equipment which uses plastic powder to make hollow roto-molded products. It mainly drives the roto-molding mold which is evenly heated to rotate around the X-axis and Y-axis through a working arm, so that the molten plastic powder in the roto-molding mold is evenly coated and adhered to the entire inner surface of the roto-molding mold under the action of gravity, so that the roto-molded product is formed. When the roto-molding mold is rotated, the L-arm and other mechanisms can be used to drive the roto-molding mold to rotate more stably, so that the molten powder can be evenly coated on the inside of the roto-molding mold.

[0003] In the prior art, the Chinese patent with the authorization announcement number CN202846796U discloses a large torque double-inflating rotomolding machine L arm, which relates to a rotomolding machine working arm structure for making hollow rotomolding products using plastic powder, mainly including a main shaft, a secondary shaft, an L arm, an arm head, a mandrel, an inflation joint, an inflation pipe, an inflation pipe, an L-shaped inner vent pipe and an L-shaped outer vent pipe, etc., and the L arm of the rotomolding machine has a normal pressure inflation route and a high pressure inflation route, and the purpose of providing different pressure gases to the rotomolding mold during heating or heat preservation can be achieved through the dual inflation route, and by adding this automatic double inflation structure in the L arm, the rotomolding machine has the advantages of shortening processing time, saving energy, improving the quality of rotomolding products, and improving production efficiency. At the same time, the structure also designs the secondary shaft outside the main shaft, so that the chain drive connection structure between the secondary shaft and the horizontal inner arm can be ensured not to be limited by the size of the main shaft, and the torque of the L arm is enhanced, so that the rotomolding machine can be suitable for the processing of large rotomolding products.

[0004] The above mechanism cooperates with each other through components such as the main shaft, the secondary shaft, the L-arm, the arm head, the core shaft, the inflation joint, the inflation pipe, the inflation tube, the L-shaped inner ventilation tube and the L-shaped outer ventilation tube, so that the L-arm can operate flexibly and realize the operation of the entire device. However, in actual use, the secondary shaft is designed on the outside of the main shaft, which will cause the tolerable torque to be reduced. At the same time, the L-arm of the rotational molding machine has a large weight when in use, and the pulling force it needs to withstand when working is also large. When the anti-pulling performance is weak, the L-arm will be damaged, and the L-arm is not provided with a reinforcement mechanism to increase the protection and enhancement of the L-arm. Utility Model Content

[0005] The utility model aims to provide an L-arm for a rotational molding machine, so as to solve the problems in the background art that the secondary shaft is designed on the outside of the main shaft, which will cause a reduction in the tolerable torque, and the L-arm will be damaged when the tensile strength is weak.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an L-arm of a rotational molding machine, a main shaft body is rotatably connected inside the mounting seat, a main shaft gear is sleeved on the outer side of the main shaft body, a rotating rod is rotatably connected inside the main shaft body, and a countershaft gear is fixedly connected to one side of the rotating rod, one end of the main shaft body is rotatably connected to a main box beam, and one end of the rotating rod extends to the inside of the main box beam and is sleeved with a first gear plate, one end of the main box beam is rotatably connected to a sub-box beam, one end of the inside of the sub-box beam is rotatably connected to a countershaft body, and a second gear plate is sleeved on the outer side of the countershaft body, chains are meshed on the outer sides of the first gear plate and the second gear plate, a chain tensioning mechanism is provided at one end of the main box beam, and a bevel gear is fixedly connected to one end of the countershaft body;

[0007] A placement box is fixedly connected to the other side of the main box girder, and a counterweight mechanism is arranged inside the placement box. The counterweight mechanism is used to adjust according to the weight of one side of the main box girder, so as to ensure the balance of the main box girder;

[0008] One end of the secondary shaft body extends to the interior of the main box beam, and the second gear plate is arranged inside the main box beam. A reinforcing mechanism is arranged at the connection between the main box beam and the auxiliary box beam, and the reinforcing mechanism is used to increase the strength between the main box beam and the auxiliary box beam to prevent the main box beam and the auxiliary box beam from breaking.

[0009] Furthermore, the counterweight mechanism includes a longitudinal partition plate, and the longitudinal partition plate is fixedly connected to the middle position inside the placement box, the top and bottom ends of the longitudinal partition plate are fixedly connected to multiple transverse partition plates, and multiple counterweight blocks are arranged on one side between the transverse partition plates.

[0010] Furthermore, both ends of the placement box are threadedly connected with baffles, and the baffles are arranged at the middle positions between the two ends of the counterweight block.

[0011] Furthermore, the transverse partition plates are evenly spaced and distributed inside the placement box, and the transverse partition plates are symmetrical about the central axis of the placement box in the horizontal direction.

[0012] Furthermore, the reinforcing mechanism includes a support plate, the support plate is fixedly connected to both ends of the main box beam, and one end of the support plate is fixedly connected with a reinforcing plate, and the reinforcing plates are evenly spaced and distributed at one end of the support plate.

[0013] Furthermore, a second reinforcing rib is fixedly connected to one side of the auxiliary box girder at one end of the main box girder, and a plurality of first reinforcing ribs are fixedly connected to both sides of the auxiliary box girder.

[0014] Furthermore, one end of the bevel gear is meshed with a disc tooth, and one end of the disc tooth is fixedly connected to a fixing frame, and the other end of the disc tooth is provided with a center hole.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The positions of the main box beam and the main shaft gear can be fixed by the mounting seat, and the main shaft gear is driven to rotate, so that the main shaft gear can drive the main shaft body to rotate, so that the main box beam can be driven at this time. At the same time, in order to ensure the stability of the whole during rotation, the countershaft gear is driven to rotate, and at the same time, the countershaft gear can drive the rotating rod to rotate, so that the rotating rod drives the first gear plate to rotate. When the first gear plate rotates, it can use the chain to drive the second gear plate to rotate, so that the second gear plate drives the countershaft body to rotate. Since the rotation of the countershaft body will drive the bevel gear to rotate, the disc teeth and the bevel gear are used at the same time. The first gear plate and the second gear plate are meshed with each other, so that the fixing frame is driven to rotate, and the overall demand is met. The multi-stage drive is used to increase the stability of the L wall when in use, and the internal components are driven to rotate by the chain and other structures while the multi-stage drive is used, which can effectively reduce the waste of resources during use. The chain tensioning mechanism can adjust the tightness of the chain according to different needs, so that the chain can be more closely meshed with the first gear plate and the second gear plate, so that the rotation of the device as a whole can be more stable, and the unexpected situation during rotation is effectively avoided, so that the stability of the device as a whole during use is increased;

[0017] Furthermore, since the main box girder will constantly rotate due to demand, and since one side of the main box girder is heavier, if no counterweight is used, the heavier side will rotate due to inertia after the drive stops, causing safety accidents. At the same time, it is not in line with the stability of the whole during use. The longitudinal partition plate and the transverse partition plate can be used to divide the space inside the placement box, so as to facilitate the stable placement of the counterweight block and avoid the problem of the counterweight block falling during the rotation process to cause a safety accident.

[0018] Furthermore, the baffle can be used to block the middle position of the two ends of the counterweight block, thereby effectively preventing the counterweight block from being thrown out during the rotation process, increasing the overall safety during use, and at the same time, after the counterweight block is used for counterweighting, one side of the main box beam will not rotate significantly due to inertia caused by the heavy weight.

[0019] 2. When the main box girder is driven to rotate, the rotation of one side of the main box girder will have a certain inertia due to its heavy weight. At the same time, due to its heavy weight, the main box girder is at risk of breaking during use, and its safety is low. The main box girder can be reinforced by using a reinforcing plate and a supporting plate to reduce the possibility of the main box girder breaking. At the same time, the first reinforcing rib and the second reinforcing rib are used to increase the strength of the main box girder itself from different positions, so as to better perform the overall work;

[0020] Furthermore, the center hole can be used for two-way inflation, avoiding the need for the pipeline set inside the device to rotate significantly with the main box girder, reducing the risk of pipeline breakage. At the same time, the center hole can better realize inflation and reuse the heated gas, reducing resource waste and realizing waste heat recovery, thereby ensuring that the overall stability during use is improved during plastic processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a side view of the three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from top view;

[0023] Figure 3 This is a schematic diagram of the front view and cross-section of the three-dimensional structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the utility model when viewed from above;

[0025] Figure 5 It is a partial enlarged structural schematic diagram of the counterweight mechanism of the utility model;

[0026] Figure 6 It is a partial enlarged structural schematic diagram of the strengthening mechanism of the utility model.

[0027] In the figure: 1. main shaft gear; 2. secondary shaft gear; 3. main shaft body; 4. first gear plate; 5. second gear plate; 6. main box beam; 7. rotating rod; 8. secondary shaft body; 9. bevel gear; 10. plate teeth; 11. center hole; 12. fixing frame; 13. horizontal partition plate; 14. longitudinal partition plate; 15. baffle plate; 16. counterweight block; 17. mounting seat; 18. reinforcement plate; 19. first reinforcement rib; 20. second reinforcement rib; 21. support plate; 22. placement box; 23. secondary box beam; 24. chain tensioning mechanism. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Embodiment 1:

[0030] like Figure 1-Figure 5The technical solution shown is to solve the problem that the L-arm of the rotational molding machine has different torques caused by different rotation speeds when in use, and the L-arm has the same counterweight, which affects the stability of the L-arm when in rotation: the L-arm of the rotational molding machine discloses a counterweight mechanism, the main shaft body 3 is rotatably connected inside the mounting seat 17, the main shaft gear 1 is sleeved on the outer side of the main shaft body 3, the main shaft body 3 is rotatably connected to the rotating rod 7 inside, and one side of the rotating rod 7 is fixedly connected to the secondary shaft gear 2, one end of the main shaft body 3 is rotatably connected to the main box beam 6, and one end of the rotating rod 7 extends to the inside of the main box beam 6 and is sleeved with a first gear plate 4, one end of the main box beam 6 is rotatably connected to the auxiliary box beam 23, one end of the auxiliary box beam 23 is rotatably connected to the secondary shaft body 8, and the outer side of the secondary shaft body 8 is sleeved with a second gear plate 5, the first gear plate 4 and the outer side of the second gear plate 5 are meshed with chains, one end of the main box beam 6 is provided with a chain tensioning mechanism 24, and one end of the secondary shaft body 8 is fixedly connected to a bevel gear 9;

[0031] A placement box 22 is fixedly connected to the other side of the main box girder 6, and a counterweight mechanism is arranged inside the placement box 22. The counterweight mechanism is used to adjust according to the weight of one side of the main box girder 6, so as to ensure the balance of the main box girder 6;

[0032] One end of the secondary shaft body 8 extends to the interior of the main box beam 6, and the second gear plate 5 is arranged inside the main box beam 6. A reinforcing mechanism is provided at the connection between the main box beam 6 and the auxiliary box beam 23, and the reinforcing mechanism is used to increase the strength between the main box beam 6 and the auxiliary box beam 23 to prevent the main box beam 6 and the auxiliary box beam 23 from breaking.

[0033] The counterweight mechanism includes a longitudinal partition plate 14, and the longitudinal partition plate 14 is fixedly connected to the middle position inside the placement box 22, the top and bottom ends of the longitudinal partition plate 14 are fixedly connected to multiple transverse partition plates 13, and one side between the transverse partition plates 13 is provided with multiple counterweight blocks 16.

[0034] Both ends of the placement box 22 are threadedly connected with baffles 15 , and the baffles 15 are arranged at the middle positions between the two ends of the counterweight block 16 .

[0035] The transverse partition plates 13 are evenly spaced and distributed inside the placement box 22 , and the transverse partition plates 13 are symmetrical about the central axis of the placement box 22 in the horizontal direction.

[0036] In this example, the positions of the main box beam 6 and the main shaft gear 1 can be fixed by the mounting seat 17, and the main shaft gear 1 is driven to rotate, so that the main shaft gear 1 can drive the main shaft body 3 to rotate, so that the main box beam 6 can be driven at this time, and at the same time, in order to ensure the stability of the whole during rotation, the countershaft gear 2 is driven to rotate, and at the same time, the countershaft gear 2 can drive the rotating rod 7 to rotate, so that the rotating rod 7 drives the first gear plate 4 to rotate, and when the first gear plate 4 rotates, it can use the chain to drive the second gear plate 5 to rotate, so that the second gear plate 5 drives the countershaft body 8 to rotate, because the rotation of the countershaft body 8 will drive the bevel gear 9 to rotate, and at the same time, the disc teeth 10 and the bevel gear 9 are meshed with each other. The main box girder 6 will rotate continuously as required, and one side of the main box girder 6 is heavier. Without counterweighting, the heavier side will rotate due to inertia after the drive stops, causing a safety accident. At the same time, it does not meet the stability of the whole during use. The longitudinal partition plate 14 and the transverse partition plate 13 can be used to separate the space inside the placement box 22, so as to facilitate the stable placement of the counterweight block 16 and avoid the problem of the counterweight block 16 falling off during the rotation process, causing a safety accident. At the same time, after counterweighting with the counterweight block 16, one side of the main box girder 6 will not rotate significantly due to inertia caused by the heavy weight.

[0037] Embodiment 2:

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 The technical solution shown is to solve the problem of breakage of the L-arm due to the large torque during rotation and insufficient strength of the L-arm during use: the L-arm of the rotational molding machine discloses a reinforcement mechanism, which includes a support plate 21, the support plate 21 is fixedly connected to both ends of the main box beam 6, and one end of the support plate 21 is fixedly connected to a reinforcement plate 18, and the reinforcement plates 18 are evenly spaced and distributed at one end of the support plate 21.

[0039] A second reinforcing rib 20 is fixedly connected to one side of the auxiliary box beam 23 at one end of the main box beam 6 , and a plurality of first reinforcing ribs 19 are fixedly connected to both sides of the auxiliary box beam 23 .

[0040] In this example, when the main box girder 6 is driven to rotate, the rotation of one side of the main box girder 6 will have a certain inertia due to its heavy weight. At the same time, due to its heavy weight, the main box girder 6 is at risk of breaking during use, and its safety is low. The main box girder 6 can be reinforced by using the reinforcing plate 18 and the support plate 21 to reduce the possibility of the main box girder 6 breaking. At the same time, the first reinforcing rib 19 and the second reinforcing rib 20 are used to increase the strength of the main box girder 6 itself from different positions, so as to better perform the overall work.

[0041] Embodiment three:

[0042] like Figure 4 The technical solution shown is to solve the problem of inconvenience in inflation caused by changing the positions of the rotating rod 7 and the main shaft body 3: the L-arm of the rotational molding machine discloses an inflation mechanism, one end of the bevel gear 9 is meshed with a disc tooth 10, and one end of the disc tooth 10 is fixedly connected to a fixing frame 12, and the other end of the disc tooth 10 is provided with a center hole 11.

[0043] In this example, the center hole 11 can be used for two-way inflation, avoiding the pipeline set inside the device to rotate significantly with the main box beam 6, reducing the risk of pipeline breakage. At the same time, the center hole 11 can better realize inflation and reuse the heated gas, reducing the waste of resources and realizing waste heat recovery, thereby ensuring that the overall stability during use is improved during plastic processing.

[0044] 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. An L-arm of a rotational molding machine, wherein a main shaft body (3) is rotatably connected inside a mounting seat (17), a main shaft gear (1) is sleeved on the outer side of the main shaft body (3), a rotating rod (7) is rotatably connected inside the main shaft body (3), and a countershaft gear (2) is fixedly connected to one side of the rotating rod (7), one end of the main shaft body (3) is rotatably connected to a main box beam (6), and one end of the rotating rod (7) extends to the inside of the main box beam (6) and is sleeved with a first gear plate (4), one end of the main box beam (6) is rotatably connected to a countershaft body (8), one end of the inside of the countershaft beam (23) is rotatably connected to a countershaft body (8), and a second gear plate (5) is sleeved on the outer side of the countershaft body (8), chains are meshed on the outer sides of the first gear plate (4) and the second gear plate (5), one end of the main box beam (6) is provided with a chain tensioning mechanism (24), and one end of the countershaft body (8) is fixedly connected to a bevel gear (9); Features: A placement box (22) is fixedly connected to the other side of the outside of the main box beam (6), and a counterweight mechanism is arranged inside the placement box (22), the counterweight mechanism being used to adjust according to the weight of one side of the main box beam (6), thereby ensuring the balance of the main box beam (6); One end of the secondary shaft body (8) extends to the inside of the main box beam (6), and the second gear plate (5) is arranged inside the main box beam (6). A reinforcing mechanism is arranged at the connection between the main box beam (6) and the auxiliary box beam (23), and the reinforcing mechanism is used to increase the strength between the main box beam (6) and the auxiliary box beam (23) to prevent the main box beam (6) and the auxiliary box beam (23) from breaking.

2. The L-arm of the rotomolding machine according to claim 1, characterized in that: The counterweight mechanism comprises a longitudinal partition plate (14), and the longitudinal partition plate (14) is fixedly connected to a middle position inside the placement box (22), a plurality of transverse partition plates (13) are fixedly connected to the top and bottom ends of the longitudinal partition plate (14), and a plurality of counterweight blocks (16) are arranged on one side between the transverse partition plates (13).

3. The L-arm of the rotomolding machine according to claim 2, characterized in that: Both ends of the placement box (22) are threadedly connected with baffles (15), and the baffles (15) are arranged at the middle positions between the two ends of the counterweight block (16).

4. The L-arm of the rotomolding machine according to claim 3, characterized in that: The transverse partition plates (13) are distributed at equal intervals inside the placement box (22), and the transverse partition plates (13) are symmetrical about the central axis of the placement box (22) in the horizontal direction.

5. The L-arm of the rotomolding machine according to claim 4, characterized in that: The reinforcing mechanism comprises a support plate (21), wherein the support plate (21) is fixedly connected to both ends of the main box girder (6), and one end of the support plate (21) is fixedly connected to a reinforcing plate (18), and the reinforcing plates (18) are distributed at equal intervals on one end of the support plate (21).

6. The L-arm of the rotomolding machine according to claim 5, characterized in that: A second reinforcing rib (20) is fixedly connected to one side of the auxiliary box girder (23) at one end of the main box girder (6), and a plurality of first reinforcing ribs (19) are fixedly connected to both sides of the auxiliary box girder (23).

7. The L-arm of the rotomolding machine according to claim 6, characterized in that: One end of the bevel gear (9) is meshed with a disc tooth (10), and one end of the disc tooth (10) is fixedly connected to a fixing frame (12), and the other end of the disc tooth (10) is provided with a center hole (11).

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