An O-arm assembly and shuttle type rotational molding machine

Abstract

The present invention provides an O-arm assembly and a shuttle type rotomolding machine, belonging to the technical field of rotomolding machines. It solves the problem that the existing O-arm equipment cannot effectively reduce the stress of the drive shaft. An O-arm assembly of the present invention includes a pulley, a surrounding arm, a drive mechanism, a drive plate, a driving shaft, a second limit seat and a stress ring. In the present invention, the second bearing is separated from the inner side wall of the ring groove by a stress ring to avoid direct contact between the first R angle with a smaller radius and the second R angle, that is, the stress ring increases the contact area with the second R angle and fits with the second R angle, thereby effectively reducing the stress between the side wall of the ring groove and the second bearing, thereby reducing the stress on the driving shaft and avoiding the driving shaft from breaking.

Description

Technical Field

[0001] The invention belongs to the technical field of rotational molding machines, and relates to an O-arm assembly and shuttle type rotational molding machine. Background Art

[0002] The O-arm device used to support the material in the rotational molding machine is the core structure of the heat treatment equipment. It can ensure that the material is always in a rotating state during the heating process so that the material can be heated evenly. However, during the rotation of the existing O-arm device, the driving shaft used to drive the O-arm device to rotate is affected by stress, resulting in the driving shaft breaking. Especially when the O-arm device is carrying a heavier weight of material, the stress on the driving shaft will be greater, and the fracture of the driving shaft will be more obvious, which will cause a safety accident. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems in the prior art and to propose an O-arm assembly and shuttle rotomolding machine which can effectively reduce the stress of the drive shaft and is suitable for heavy materials.

[0004] The object of the present invention can be achieved by the following technical solutions: An O-arm assembly, comprising:

[0005] pulley;

[0006] The arm is rotatably arranged between the two ends of the pulley;

[0007] A driving mechanism is arranged at one end of the pulley, and the driving mechanism drives the surrounding arm to rotate. The driving mechanism includes a driving plate arranged on the pulley, and the driving plate is rotatably provided with a driving shaft connected to one side of the surrounding arm. A second limit seat is arranged on the driving plate, and the driving shaft moves through the second limit seat. A stress ring is sleeved on the driving shaft for reducing the stress between the driving shaft and the second limit seat, and one side of the stress ring abuts against the side of the second limit seat.

[0008] In the above-mentioned O-arm assembly, a second bearing is provided between the second limit seat and the driving shaft, and a first R angle is provided at the edge of a side surface of the second bearing in contact with the driving shaft.

[0009] In the above-mentioned O-arm assembly, the driving shaft is provided with a ring groove for installing a second bearing and a stress ring, the edge of the ring groove close to one end of the stress ring is provided with a second R angle, the edge of the stress ring in contact with the second R angle is provided with a third R angle, and the radius of the second R angle is the same as the radius of the third R angle.

[0010] In the above-mentioned O-arm assembly, a first limit seat is provided on the driving plate, the driving shaft moves through the first limit seat, a first bearing is provided between the first limit seat and the driving shaft, and a sub-gear is installed on the driving shaft.

[0011] In the above-mentioned O-arm assembly, a motor with a main shaft is arranged on the driving plate, a main gear meshing with a sub-gear is arranged on the main shaft, a support plate for supporting the main shaft is arranged on the driving plate, and the main shaft moves through the support plate.

[0012] In the above-mentioned O-arm assembly, the pulley includes a pair of slides, the bottoms of the two slides are connected by a base frame, the driving mechanism is arranged on one of the slides, a driven shaft is arranged on the arm, the driving shaft and the driven shaft are coaxially arranged, and a driven seat is provided on the other slide, and the driven shaft moves through the driven seat.

[0013] In the above-mentioned O-arm assembly, at least one first reinforcement rod is provided on the side of each of the slides, and a second reinforcement rod is provided on the side of the base frame.

[0014] In the above-mentioned O-arm assembly, the enclosure arm includes a pair of enclosure rods, one of which is connected to the driving shaft, and the other is connected to the driven shaft, and the two enclosure rods are connected by two connecting rods.

[0015] In the above-mentioned O-arm assembly, a first center rod is provided in the middle of one connecting rod, and a second center rod is provided in the middle of the other connecting rod, and the first center rod and the second center rod are coaxially arranged.

[0016] A shuttle type rotational molding machine comprises: the above-mentioned O-arm assembly pulley, an oven is arranged on one side of the pulley, a straight arm mechanism is slidably arranged on the other side of the pulley away from the oven, a slide rail is laid between the bottom of the straight arm mechanism and the bottom of the O-arm mechanism, and the slide rail passes through the oven.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, the second bearing is separated from the inner side wall of the annular groove by a stress ring to avoid direct contact between the first R angle with a smaller radius and the second R angle, that is, the stress ring increases the contact area with the second R angle and fits with the second R angle, thereby effectively reducing the stress between the side wall of the annular groove and the second bearing, thereby reducing the stress on the driving shaft and avoiding the driving shaft from breaking.

[0019] 2. A support plate for supporting the main shaft is provided on the driving plate, and the main shaft moves through the support plate. Through the function of the support seat, the main shaft will not shake during operation, that is, the main shaft can rotate stably, thereby ensuring that the main shaft will not contact the motor casing during operation, ensuring that the motor casing will not be damaged.

[0020] 3. At least one first reinforcement rod is provided on the side of the slide. During the assembly process, people can weld at least one first reinforcement rod to each inclined side of the slide according to needs to enhance the overall firmness of the slide so that people can step on the slide stably.

[0021] 4. During the assembly process, people can weld the second reinforcement rods to both sides of the base frame according to actual needs to strengthen the firmness between the two slides, thereby ensuring the stability of the pulley.

[0022] 5. In the O-arm assembly of the present invention, by reducing the stress of the driving shaft, stabilizing the rotation of the main shaft and enhancing the overall firmness of the pulley, the O-arm assembly can be suitable for materials with heavier weight and reduce the possibility of breakage of the driving shaft; secondly, through the detection of the first center rod and the second center rod, people can adjust the surrounding arm so that the surrounding arm can be assembled in place. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the O-arm assembly.

[0024] Figure 2 It is a schematic diagram of the structure of the arm.

[0025] Figure 3 It is a structural diagram of the driving mechanism.

[0026] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle drive mechanism from another perspective.

[0027] Figure 5 yes Figure 4 Section view at AA.

[0028] Figure 6 yes Figure 5 Cross-sectional view at A.

[0029] Figure 7 It is a schematic diagram of the structure of the stress ring.

[0030] Figure 8 It is a structural diagram of the pulley.

[0031] Fig. 9 It is a structural diagram of a shuttle type rotational molding machine. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0033] Embodiment 1

[0034] like Figure 1 — Figure 8 As shown, an O-arm assembly of the present invention includes a pulley 100 , a surrounding arm 200 , a driving mechanism 300 , a driving plate 310 , a driving shaft 320 , a second limit seat 330 and a stress ring 340 .

[0035] The arm 200 is rotatably arranged between the two ends of the pulley 100, and the driving mechanism 300 is arranged at one end of the pulley 100. The driving mechanism 300 drives the arm 200 to rotate. When working, the driving mechanism 300 drives the arm 200 to rotate. Therefore, when people move the pulley 100 to a heating device suitable for the O-arm assembly, the arm 200 will roll in the heating device, so that the objects in the O-arm assembly will be evenly heated, thereby improving the heating efficiency of the objects; the driving mechanism 300 includes a driving plate 310 arranged on the pulley 100, and the driving plate 310 is rotatably provided with a driving shaft 320 connected to one side of the surrounding arm 200, and a second limit seat 330 is provided on the driving plate 310. The driving shaft 320 moves through the second limit seat 330. A stress ring 340 is sleeved on the driving shaft 320 for reducing the stress between the driving shaft 320 and the second limit seat 330. One side of the stress ring 340 is against the side of the second limit seat 330. Through the setting of the stress ring 340, the stress between the second limit seat 330 and the driving shaft 320 is effectively reduced, thereby reducing the possibility of breakage of the driving shaft 320.

[0036] like Figure 3 — Figure 7As shown, a second bearing 331 is provided between the second limiting seat 330 and the driving shaft 320, and a first R angle a is provided at the edge of the side where the second bearing 331 contacts the driving shaft 320. The driving shaft 320 is provided with an annular groove 321 for installing the second bearing 331 and the stress ring 340, and a second R angle b is provided at the edge of the annular groove 321 close to one end of the stress ring 340, and a third R angle c is provided at the edge of the stress ring 340 in contact with the second R angle b, and the radius of the second R angle b is the same as the radius of the third R angle c. During installation, people need to install the second bearing 331 between the second limiting seat 330 and the driving shaft 320, and sleeve the second bearing 331 on the annular groove 321 of the driving shaft 320, so that the driving shaft 320 can rotate relative to the second limiting seat 330. After that, people need to sleeve the stress ring 340 on the annular groove 321, and make the side of the stress ring 340 close to the second bearing 331 press against the side of the second bearing 331 with the first R angle a, and make the side of the stress ring 340 with the third R angle c press against the inner wall of the annular groove 321, and fit the second R angle b with the third R angle c. In this way, the second bearing 331 and the inner wall of the annular groove 321 can be separated by the stress ring 340, avoiding direct contact between the first R angle a with a smaller radius and the second R angle b, that is, the stress ring 340 increases the contact area with the second R angle b, and fits with the second R angle b, thereby effectively reducing the stress between the side wall of the annular groove 321 and the second bearing 331, thereby reducing the stress on the driving shaft 320 and avoiding the driving shaft 320 from breaking.

[0037] A first limit seat 350 is provided on the driving plate 310, and the driving shaft 320 moves through the first limit seat 350. A first bearing 351 is provided between the first limit seat 350 and the driving shaft 320. During installation, people need to move the driving shaft 320 through the first limit seat 350 and install the first bearing 351 between the first limit seat 350 and the driving shaft 320 to enable the driving shaft 320 to rotate relative to the first limit seat 350. Furthermore, through the action of the first limit seat 350 and the second limit seat 330, it is ensured that the driving shaft 320 will not shake during the rotation of the driving shaft 320.

[0038] A sub-gear 322 is installed on the driving shaft 320, and a motor 360 with a main shaft 361 is arranged on the driving plate 310. The main shaft 361 is provided with a main gear 362 meshing with the sub-gear 322. When the motor 360 rotates, the motor 360 drives the main shaft 361 and the main gear 362 to rotate synchronously. Since the sub-gear 322 is meshed with the main gear 362, the sub-gear 322 and the driving shaft 320 also rotate with the main gear 362, so that the surrounding arm 200 will rotate.

[0039] A support plate 311 for supporting the main shaft 361 is provided on the driving plate 310. The main shaft 361 moves through the support plate 311. Through the action of the support plate 311, the main shaft 361 will not shake during operation, thereby ensuring that the main shaft 361 and the outer casing of the motor 360 (not marked in the figure) will never contact during operation, ensuring that the outer casing of the motor 360 will not be damaged.

[0040] like Figure 8 As shown, the pulley 100 includes a pair of slides 110, and the bottoms of the two slides 110 are connected by a base frame 120. The driving mechanism 300 is arranged on one of the slides 110. The surrounding arm 200 is provided with a driven shaft 210, and the driving shaft 320 is coaxially arranged with the driven shaft 210. A driven seat 111 is provided on the other slide 110, and the driven shaft 210 moves through the driven seat 111. Therefore, when the driving shaft 320 drives the surrounding arm 200 to rotate, the driven shaft 210 rotates relative to the driven seat 111. Furthermore, the driving shaft 320 is coaxially arranged with the driven shaft 210, so that the surrounding arm 200 can rotate circumferentially around the driving shaft 320 or the driven shaft 210.

[0041] At least one first reinforcement rod 112 is provided on the side of the slide 110. During the assembly process, people can weld at least one first reinforcement rod 112 to each inclined side of the slide 110 as needed to enhance the overall firmness of the slide 110 so that people can step on the slide 110 stably.

[0042] A second reinforcing rod 121 is provided on the side of the base frame 120 . During the assembly process, people can weld the second reinforcing rod 121 to both sides of the base frame 120 according to actual needs to strengthen the firmness between the two slides 110 , thereby ensuring the stability of the pulley 100 .

[0043] like Figure 1 — Figure 2 As shown, the enclosure arm 200 includes a pair of enclosure rods 220, wherein one enclosure rod 220 is connected to the driving shaft 320, and the other enclosure rod 220 is connected to the driven shaft 210, and the two enclosure rods 220 are connected by two connecting rods 230, and a pedal block 231 is sleeved on the outer surface of each connecting rod 230, wherein the cross-sectional shape of the outer surface of the pedal block 231 is rectangular, so that people can walk easily on the enclosure arm 200 without falling off the connecting rod 230 with a circular cross-sectional shape.

[0044] The middle part of one connecting rod 230 is detachably connected to the first center rod 240, and the middle part of the other connecting rod 230 is detachably connected to the second center rod 250. The first center rod 240 and the second center rod 250 are coaxially arranged. During the assembly process, when people assemble the surrounding arm 200 between the driven shaft 210 and the driving shaft 320, people need to connect one end of the first center rod 240 to the middle part of one of the connecting rods 230, and make the first center rod 240 perpendicular to the connecting rod 230. After that, one end of the second center rod 250 needs to be connected to the other. The middle part of the connecting rod 230 is connected, and the second center rod 250 is made perpendicular to the connecting rod 230, and when the first center rod 240 and the second center rod 250 are coaxial, it can be determined that the two connecting rods 230 are parallel and the ends of the two connecting rods 230 are flush, that is, it can be determined that the arm 200 has been installed in place, and when the first center rod 240 and the second center rod 250 are not coaxial, it can be determined that the ends of the two connecting rods 230 are not flush, that is, it can be determined that the arm 200 is not installed in place, and people need to reassemble the arm 200.

[0045] When the arm is assembled and adjusted successfully, the first center rod and the second center rod can be removed from the corresponding connecting rods so that the material can be installed inside the arm.

[0046] Embodiment 2

[0047] like Fig. 9 As shown, the difference between the second embodiment and the first embodiment is that the second embodiment applies the O-arm assembly in the first embodiment to the shuttle-type rotational molding machine.

[0048] Specifically, a shuttle type rotational molding machine includes: the above-mentioned O-arm assembly pulley 100, an oven 400 is provided on one side of the pulley 100, and a straight arm mechanism 500 is slidably provided on the other side of the oven 400 away from the pulley 100, and a slide rail 600 is laid between the bottom of the straight arm mechanism 500 and the bottom of the O-arm mechanism, and the slide rail 600 passes through the oven 400, and the pulley 100 is slidably connected to the slide rail 600, and a moving vehicle 51 for supporting the straight arm mechanism 500 is also slidably provided on the slide rail 600 0, wherein an opening (not marked in the figure) is provided at the bottom of the oven 400 for the slide rail 600 to pass through. When people want to push the straight arm mechanism 500 or the O-arm assembly into the oven 400, they need to open the door (not marked in the figure) on the oven 400, and then use external force to push the pulley 100 or the moving vehicle 510, so that the straight arm mechanism 500 or the O-arm assembly can be smoothly moved into the oven 400. After that, the oven 400 can perform heat treatment on the materials in the straight arm mechanism 500 or the O-arm assembly.

[0049] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An O-arm assembly, characterized in that: include: pulley; The arm is rotatably arranged between the two ends of the pulley; A driving mechanism is provided at one end of the pulley, the driving mechanism drives the surrounding arm to rotate, the driving mechanism includes a driving plate provided on the pulley, the driving plate is rotatably provided with a driving shaft connected to one side of the surrounding arm, a second limit seat is provided on the driving plate, the driving shaft movably passes through the second limit seat, a stress ring for reducing the stress between the driving shaft and the second limit seat is sleeved on the driving shaft, and one side of the stress ring abuts against the side of the second limit seat; A second bearing is provided between the second limit seat and the driving shaft, and a first R angle is provided at the edge of a side surface of the second bearing in contact with the driving shaft; The driving shaft is provided with an annular groove for mounting a second bearing and a stress ring, the annular groove is provided with a second R angle at an edge close to one end of the stress ring, the stress ring is provided with a third R angle at an edge in contact with the second R angle, and the radius of the second R angle is the same as the radius of the third R angle; The driving plate is provided with a first limit seat, the driving shaft movably passes through the first limit seat, a first bearing is provided between the first limit seat and the driving shaft, and a sub-gear is installed on the driving shaft; A motor with a main shaft is arranged on the driving plate, a main gear meshing with a secondary gear is arranged on the main shaft, a support plate for supporting the main shaft is arranged on the driving plate, and the main shaft movably passes through the support plate.

2. An O-arm assembly according to claim 1, characterized in that: The pulley includes a pair of slides, the bottoms of the two slides are connected by a base frame, the driving mechanism is arranged on one of the slides, a driven shaft is arranged on the arm, the driving shaft and the driven shaft are coaxially arranged, and a driven seat is arranged on the other slide, and the driven shaft moves through the driven seat.

3. An O-arm assembly according to claim 2, characterized in that: At least one first reinforcement rod is arranged on the side of each of the slides, and a second reinforcement rod is arranged on the side of the base frame.

4. The O-arm assembly according to claim 2, characterized in that: The enclosure arm comprises a pair of enclosure rods, one of which is connected to the driving shaft, and the other is connected to the driven shaft. The two enclosure rods are connected by two connecting rods, and a pedal block is sleeved on the outer surface of each connecting rod.

5. An O-arm assembly according to claim 4, characterized in that: A first central rod is provided at the middle of one of the connecting rods, and a second central rod is provided at the middle of the other connecting rod, and the first central rod is coaxially arranged with the second central rod.

6. A shuttle type rotational molding machine, characterized in that: include: The O-arm assembly according to any one of claims 1 to 5 is provided with an oven on one side of the pulley, and a straight arm mechanism is slidably provided on the other side of the pulley away from the oven, and a slide rail is laid between the bottom of the straight arm mechanism and the bottom of the O-arm assembly, and the slide rail passes through the oven.

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