Fruit batch feeder
By designing a fruit feeding machine, the height adjustment, lifting and pushing mechanisms are used to realize the automatic pouring and discharge of fruits, solving the problem of time and effort of manual pouring, and improving processing efficiency and operation convenience.
Patent Information
- Application Number
- CN202420847229.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-23
AI Technical Summary
During the fruit processing process, it takes time and effort to pour the processing equipment manually multiple times, which increases labor intensity and fatigue. Especially when the equipment has a high feeding port, it needs to be operated with a ladder, which is cumbersome and inefficient.
A fruit feeding machine is designed, including a height adjustment mechanism, a lifting mechanism and a feed pushing mechanism. By adjusting the dislocation of the storage box height, lifting plate and bag plate, fruits are automatically poured and discharged, reducing manual operations.
It reduces labor intensity, improves operational convenience, saves time and effort, improves labor efficiency, and reduces labor fatigue for workers.
Smart Images

Figure CN222273490U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fruit processing, in particular to a fruit feeding machine. Background Art
[0002] Fruit is a plant tissue with seeds, usually a mature egg fruit from a flowering plant. Fruits are generally sweet and can be eaten raw or processed into various delicacies. Fruits are usually rich in vitamins, minerals and fiber, and are an important source of nutrition in people's daily diet. Common fruits include apples, bananas, oranges, strawberries, grapes, etc., and fruits can be processed into juice, jam, dried fruit, etc. They are not only delicious, but also beneficial to human health.
[0003] In the process of processing fruits, it is necessary to manually pour small amounts of fruits into processing equipment multiple times, such as cleaning equipment, drying equipment, juicing equipment, etc. This manual pouring method requires workers to continuously pour materials near the processing equipment, which is time-consuming and labor-intensive. Since it is difficult to maintain efficient operation by manual labor, the labor efficiency is low, which increases the work intensity and fatigue of the staff. In addition, the feeding port of some equipment is high, and workers need to use ladders to pour the fruits into it. The operation is cumbersome, which further increases the labor intensity.
[0004] Therefore, a fruit feeding machine is proposed to solve the above problems. Utility Model Content
[0005] The purpose of the utility model is to provide a fruit feeding machine to solve the above problems.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A fruit feeding machine comprises a bottom plate, a material storage box and a height adjustment mechanism, wherein the material storage box is arranged just above the bottom plate, the bottom plate and the material storage box are connected via the height adjustment mechanism, the inner right wall of the material storage box is provided with a material pocketing plate whose front and rear ends are connected to its inner side wall, a lifting plate is provided on the left side of the material pocketing plate, a lifting mechanism is provided between the material storage box and the lifting plate, a material guide plate inclined to the right and connected to its inner side wall at all four ends is provided inside the material storage box, a discharge hopper corresponding to the material guide plate is provided on the left side of the material storage box, a lifting platform located on the right side of the material storage box is provided on the right side of the top of the bottom plate, a rectangular frame is provided above the top of the lifting platform, and a material pushing mechanism is provided between the lifting platform and the rectangular frame.
[0008] Preferably, the height adjustment mechanism comprises a limit cylinder, a two-way screw rod, a fixed plate, a motor 1, a driving plate, a support rod and a limit rod, the top of the base plate is provided with four limit cylinders distributed in an array, the interiors of the four limit cylinders are slidably connected with limit rods whose upper ends extend above them and are connected to the bottom of the material storage box, fixed plates are provided on the front and rear sides of the top of the base plate, two driving plates distributed front and back are arranged between the two fixed plates, support rods are hinged between the two ends of the driving plate and the bottom of the material storage box, threaded holes are provided on the front sides of the two driving plates, the rear fixed plate is rotatably connected with a two-way screw rod that passes through the two threaded holes in sequence, the two ends of the two-way screw rod are respectively transmission-connected with the two threaded holes, and the front side of the front fixed plate is provided with a motor 1 coaxially connected with the output shaft and the front end of the two-way screw rod.
[0009] Preferably, the lifting mechanism includes a second motor, a fixed box, a slide, a positioning rod, a screw rod and a slider; a fixed box with an opening on the right side is provided on the left side of the material storage box; three slides distributed front and back are equidistantly provided on the left side of the material storage box; three sliders are equidistantly provided on the left side of the lifting plate and respectively pass through the three slides and extend to the inside of the fixed box; two positioning rods distributed front and back and passing through the sliders on both sides are provided between the upper and lower inner walls of the fixed box; a screw rod with an upper end passing through the middle slider and transmission connected to the passing part is rotatably connected to the inner bottom wall of the fixed box; a second motor with an output shaft coaxially connected to the upper end of the screw rod is provided on the top of the fixed box.
[0010] Preferably, the pushing mechanism includes a sliding block, a slide groove, a cylinder and a rectangular box. The top of the lifting platform is provided with a rectangular box with openings on the top and left side. The rectangular frame is located inside the rectangular box. The front and rear inner walls of the rectangular box are provided with laterally extending slide grooves. The front and rear sides of the rectangular frame are provided with sliding blocks extending to the inside of the slide groove on the same side. The right side of the rectangular box is provided with a cylinder connected to the right side of the rectangular frame with a telescopic shaft.
[0011] Preferably, the material pocket plate is tilted to the right, the lifting plate is triangular in shape, and the lower right end thereof is at the same level as the lower left end of the material pocket plate.
[0012] Preferably, four casters are provided at the bottom of the base plate and are distributed in a rectangular array.
[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the height position of the material storage box and the discharge hopper thereon can be adjusted by the height adjustment mechanism, so that the discharge hopper is located above the feed port of the processing equipment, the fruits are poured into the rectangular frame, and after being lifted by the lifting platform, they are higher than the top of the material storage box, and the material storage box and the fruits can be driven to move above the material storage box by the pushing mechanism, and the fruits will fall into the material storage box under the action of gravity, thus completing the storage of fruits, reducing labor intensity, and convenient operation, and the lifting mechanism can drive the lifting plate to move downward and return to its original position after a set time, and this process causes the material pocket plate and the lifting plate to be misaligned for a period of time, and the fruits can fall into the inclined material guide plate through the misaligned opening, and be discharged from the discharge hopper to the processing equipment along the inclined material guide plate, thereby replacing manual pouring, and there is no need to be next to the processing equipment all the time, saving time and effort, improving efficiency or further reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The accompanying drawings further illustrate the present invention, but the contents in the accompanying drawings do not constitute any limitation to the present invention.
[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0016] Figure 2 The utility model is a three-dimensional structure section Figure 1 ;
[0017] Figure 3 The utility model is a three-dimensional structure section Figure 2 ;
[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the material pushing mechanism and the rectangular frame of the utility model.
[0019] In the attached drawings: 1. bottom plate; 2. material storage box; 3. height adjustment mechanism; 31. limiting cylinder; 32. bidirectional screw rod; 33. fixed plate; 34. motor 1; 35. driving plate; 36. support rod; 37. limiting rod; 4. material pocket plate; 5. lifting plate; 6. lifting mechanism; 61. motor 2; 62. fixed box; 63. slide; 64. positioning rod; 65. screw rod; 66. slider; 7. material guide plate; 8. material discharge hopper; 9. lifting platform; 10. rectangular frame; 11. material pushing mechanism; 111. sliding block; 112. slide groove; 113. cylinder; 114. rectangular box; 12. casters. DETAILED DESCRIPTION
[0020] The following describes the embodiments of the utility model in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.
[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0022] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0023] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.
[0024] In this embodiment, Figure 1-4 A fruit feeding machine is provided. The utility model comprises a bottom plate 1, a material storage box 2 and a height adjustment mechanism 3. The material storage box 2 is arranged just above the bottom plate 1, and the bottom plate 1 and the material storage box 2 are connected by the height adjustment mechanism 3. The inner right wall of the material storage box 2 is provided with a material pocketing plate 4 whose front and rear ends are connected with its inner side wall, a lifting plate 5 is provided on the left side of the material pocketing plate 4, a lifting mechanism 6 is provided between the material storage box 2 and the lifting plate 5, a material guide plate 7 inclined to the right and connected with its inner side wall at all four ends is provided inside the material storage box 2, a discharge hopper 8 corresponding to the material guide plate 7 is provided on the left side of the material storage box 2, a lifting platform 9 located on the right side of the material storage box 2 is provided on the right side of the top of the bottom plate 1, a rectangular frame 10 is provided above the top of the lifting platform 9, and a pushing mechanism 11 is provided between the lifting platform 9 and the rectangular frame 10.
[0025] The fruit is then put into the upper portion of the feed box 2 and the lower portion of the feed box 2 is moved upwardly by the lifting platform 9. The fruit is then put into the upper portion of the feed box 2 and the lower portion of the feed box 2 is moved upwardly by the lifting platform 9. The fruit is then put into the upper portion of the feed box 2 and the feed box 2 is moved upwardly by the lifting platform 9. The fruit is then put into the upper portion of the feed box 2 and the feed box 2 is moved upwardly by the lifting platform 9. The fruit is then put into the upper portion of the feed box 2 and the feed box 2 is moved upwardly by the lifting platform 9. The fruit is then put into the upper portion of the feed box 2 and the feed box 2 is moved upwardly by the lifting platform 9. The fruit is then put into the upper portion of the feed box 2 and the feed box 2 is moved upwardly by the lifting platform 9. The fruit is then put into the upper portion of the feed box 2 and the feed box 2 is moved upwardly by the lifting platform 9. The fruit is then put into the upper portion of the feed box 2 and the feed box 2 is moved upwardly by the lifting platform 9. The fruit is then put into the upper portion of the feed box 2 and the feed box 2 is moved upwardly by the lifting platform 9. The fruit is then put into the upper portion of the feed box 2 and the feed box 2 is moved upwardly by the lifting platform 9.
[0026] Preferably, as another embodiment of the utility model, the height adjustment mechanism 3 includes a limit cylinder 31, a bidirectional screw rod 32, a fixing plate 33, a motor 34, a driving plate 35, a support rod 36 and a limit rod 37. Four limit cylinders 31 distributed in an array are provided on the top of the base plate 1. The interiors of the four limit cylinders 31 are slidably connected with limit rods 37 whose upper ends extend above them and are connected to the bottom of the material storage box 2. Fixed plates 33 are provided on the front and rear sides of the top of the base plate 1. Two driving plates 35 distributed front and back are arranged between the two fixing plates 33. Support rods 36 are hinged between the two ends of the driving plates 35 and the bottom of the material storage box 2. Threaded holes are provided on the front sides of the two driving plates 35. The rear fixing plate 33 is rotatably connected with a bidirectional screw rod 32 that passes through the two threaded holes in sequence. The two ends of the bidirectional screw rod 32 are respectively transmission-connected to the two threaded holes. The front side of the front fixing plate 33 is provided with a motor 34 whose output shaft is coaxially connected to the front end of the bidirectional screw rod 32.
[0027] In this embodiment, since the rotation directions of the threads at both ends of the bidirectional screw rod 32 are opposite, and the two ends are respectively connected to the threaded holes on the two drive plates 35, when the bidirectional screw rod 32 rotates, it can drive the two drive plates 35 to move towards each other or away from each other, thereby driving the support rod 36 to change the inclination angle, thereby lifting or lowering the material storage box 2 to adjust the height position of the material storage box 2. In this process, the material storage box 2 will drive the support rod 36 to slide in the limit cylinder 31, and use the limit cylinder 31 and the support rod 36 to achieve the limiting effect, thereby avoiding the deviation of the material storage box 2. Among them, the output shaft of the motor 1 34 installed on the front fixed plate 33 is coaxially connected to the bidirectional screw rod 32, and when the motor 1 34 outputs torque, it can drive the coaxially connected bidirectional screw rod 32 to rotate.
[0028] Preferably, as another embodiment of the utility model, the lifting mechanism 6 includes a second motor 61, a fixed box 62, a slide 63, a positioning rod 64, a screw 65 and a slider 66. The left side of the material storage box 2 is provided with a fixed box 62 with an opening on the right side, and three slides 63 distributed front and back are equidistantly provided on the left side of the material storage box 2. Three sliders 66 are equidistantly provided on the left side of the lifting plate 5, and respectively pass through the three slides 63 and extend to the inside of the fixed box 62. Two positioning rods 64 distributed front and back and penetrating the sliders 66 on both sides are provided between the upper and lower inner walls of the fixed box 62. The inner bottom wall of the fixed box 62 is rotatably connected with a screw 65 whose upper end passes through the middle slider 66 and is transmission-connected to the penetration point. The top of the fixed box 62 is provided with a second motor 61 whose output shaft is coaxially connected to the upper end of the screw 65.
[0029] In this embodiment, the motor 2 61 can drive the screw rod 65 to rotate, and the rotating screw rod 65 will transmit to the middle slider 66. In this process, under the limiting action of the sliders 66 on both sides and the positioning rods 64 on both sides, the lifting plate 5 and the middle slider 66 can only move vertically, so that the screw rod 65 drives the slider 66 and the lifting plate 5 connected thereto to move downward, so that the lifting plate 5 and the pocket plate 4 are misaligned, so that the fruit can be discharged downward, and the slide 63 can provide the slider 66 with the required track for lifting and lowering. Among them, the fixed box 62 can provide an installation position for the motor 2 61 and a connection position for the screw rod 65. At the same time, it also prevents the internal structure from being hit by external objects, thereby playing a protective role.
[0030] Preferably, as another embodiment of the utility model, the pushing mechanism 11 includes a sliding block 111, a slide groove 112, a cylinder 113 and a rectangular box 114. The top of the lifting platform 9 is provided with a rectangular box 114 with openings on the top and the left side. The rectangular frame 10 is located inside the rectangular box 114. The front and rear inner walls of the rectangular box 114 are provided with transversely extending slide grooves 112. The front and rear sides of the rectangular frame 10 are provided with sliding blocks 111 extending to the inside of the slide groove 112 on the same side. The right side of the rectangular box 114 is provided with a cylinder 113 whose telescopic shaft is connected to the right side of the rectangular frame 10.
[0031] In this embodiment, when the fruit is poured into the rectangular frame 10, it is lifted to a position higher than the top of the storage box 2 by the lifting platform 9, and the telescopic end of the cylinder 113 extends to push the rectangular frame 10 to move to the left. Since the upper and lower sides of the rectangular frame 10 are open, the fruit can be discharged into the storage box 2 under the action of gravity. During this process, the sliding block 111 connected to the storage box 2 can slide along the slide groove 112 on the rectangular box 114, thereby reducing the friction during movement, and at the same time, supporting the rectangular frame 10.
[0032] Preferably, as another embodiment of the utility model, the material pocket plate 4 is inclined to the right, so that the fruit poured into the storage box 2 can be moved to the left along the inclined material pocket plate 4 to be placed near the lifting plate 5. The lifting plate 5 is triangular in shape, and its lower right end is at the same level as the lower left end of the material pocket plate 4. When the lifting plate 5 moves downward, the fruit can roll to the right along the inclined surface of the top to speed up the discharge speed. The bottom of the base plate 1 is provided with four casters 12 distributed in a rectangular array, which can provide the equipment with a mobile function to facilitate the movement and transportation of the equipment.
[0033] Working principle: Motor 1 34 can drive the bidirectional screw rod 32 to rotate, and the two ends of the bidirectional screw rod 32 are respectively transmitted to the threaded holes on the two driving plates 35 to drive the two driving plates 35 to move relative to each other, so as to pull one end of the support rod 36 to move, and then change the tilt angle, so as to adjust the height position of the storage box 2 and the discharge hopper 8 thereon, so that the discharge hopper 8 faces the feeding port of the processing equipment. In this process, the support rod 36 slides in the limiting cylinder 31 to limit the deviation of the storage box 2. After the adjustment is completed, the fruit is poured into the rectangular frame 10, and after being lifted by the lifting platform 9, it is higher than the top of the storage box 2. At this time, the cylinder 113 pushes the rectangular frame 10 to move to the left. The sliding block 111 connected to the material storage box 2 can slide along the slide groove 112 on the rectangular box 114, so that the rectangular frame 10 can move smoothly horizontally, and the fruit can be discharged into the material storage box 2 under the action of gravity, so as to complete the storage of the fruit. The motor 2 61 drives the screw rod 65 and the middle slider 66 to transmit. Under the limiting action of the sliders 66 on both sides and the positioning rods 64 on both sides, the lifting plate 5 and the middle slider 66 can only move vertically, so that the middle slider 66 drives the lifting plate 5 to move downward, so that the lifting plate 5 is misaligned with the pocket plate 4, so that the fruit can be discharged downward into the inclined guide plate 7, and discharged from the discharge hopper 8 to the processing equipment along the inclined guide plate 7.
[0034] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment", "certain embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0035] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementations of the present invention without creative work, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A fruit feeding machine, characterized in that: The invention comprises a bottom plate (1), a material storage box (2) and a height adjustment mechanism (3), wherein the material storage box (2) is arranged directly above the bottom plate (1), the bottom plate (1) and the material storage box (2) are connected via the height adjustment mechanism (3), the inner right wall of the material storage box (2) is provided with a material pocket plate (4) whose front and rear ends are connected to the inner side wall thereof, a lifting plate (5) is provided on the left side of the material pocket plate (4), a lifting mechanism (6) is provided between the material storage box (2) and the lifting plate (5), a material guide plate (7) inclined to the right and connected to the inner side wall thereof at all four ends is provided inside the material storage box (2), a material discharge hopper (8) corresponding to the material guide plate (7) is provided on the left side of the material storage box (2), a lifting platform (9) located on the right side of the material storage box (2) is provided on the right side of the top of the bottom plate (1), a rectangular frame (10) is provided above the top of the lifting platform (9), and a material pushing mechanism (11) is provided between the lifting platform (9) and the rectangular frame (10).
2. A fruit feeding machine according to claim 1, characterized in that: The height adjustment mechanism (3) comprises a limiting cylinder (31), a bidirectional screw rod (32), a fixing plate (33), a motor (34), a driving plate (35), a support rod (36) and a limiting rod (37). The top of the bottom plate (1) is provided with four limiting cylinders (31) distributed in an array. The insides of the four limiting cylinders (31) are all slidably connected with limiting rods (37) whose upper ends extend above them and are connected to the bottom of the material storage box (2). The top of the bottom plate (1) is provided with fixing plates (33) on both sides. There is a support rod (36) between the two fixing plates (33). Two drive plates (35) are arranged at intervals and are arranged front and rear. Support rods (36) are hinged between the two ends of the drive plates (35) and the bottom of the material storage box (2). The front surfaces of the two drive plates (35) are provided with threaded holes. The rear fixed plate (33) is rotatably connected to a bidirectional screw rod (32) that passes through the two threaded holes in sequence. The two ends of the bidirectional screw rod (32) are respectively connected to the two threaded holes in a transmission manner. The front surface of the front fixed plate (33) is provided with a motor (34) whose output shaft is coaxially connected to the front end of the bidirectional screw rod (32).
3. A fruit feeding machine according to claim 1, characterized in that: The lifting mechanism (6) comprises a second motor (61), a fixed box (62), a sliding opening (63), a positioning rod (64), a screw rod (65) and a slider (66). The left side of the material storage box (2) is provided with a fixed box (62) with an opening on the right side. The left side of the material storage box (2) is provided with three sliding openings (63) distributed front and back at equal intervals. The left side of the lifting plate (5) is provided with three sliders (66) that respectively pass through the three sliding openings (63) and extend into the interior of the fixed box (62). Two positioning rods (64) distributed front and back and penetrating the sliders (66) on both sides are provided between the upper and lower inner walls of the fixed box (62). The inner bottom wall of the fixed box (62) is rotatably connected with a screw rod (65) whose upper end passes through the middle slider (66) and is transmission-connected to the penetration position. The top of the fixed box (62) is provided with a second motor (61) whose output shaft is coaxially connected to the upper end of the screw rod (65).
4. A fruit feeding machine according to claim 1, characterized in that: The pushing mechanism (11) comprises a sliding block (111), a slide groove (112), a cylinder (113) and a rectangular box (114); a rectangular box (114) with an open top and a left side is provided on the top of the lifting platform (9); the rectangular frame (10) is located inside the rectangular box (114); the front and rear inner walls of the rectangular box (114) are provided with a slide groove (112) extending transversely; the front and rear sides of the rectangular frame (10) are provided with sliding blocks (111) extending into the slide groove (112) on the same side; and a cylinder (113) having a telescopic shaft connected to the right side of the rectangular frame (10) is provided on the right side of the rectangular box (114).
5. A fruit feeding machine according to claim 1, characterized in that: The material pocket plate (4) is arranged to be inclined to the right, and the lifting plate (5) is in a triangular shape, with its lower right end being at the same level as the lower left end of the material pocket plate (4).
6. A fruit feeding machine according to claim 1, characterized in that: The bottom of the base plate (1) is provided with four casters (12) distributed in a rectangular array.