An assembly system and method for a dishwasher spray arm assembly

Abstract

The application discloses an assembly system and method for a dish-washing machine spray arm assembly, and belongs to the field of dish-washing machines. The application comprises sequentially arranged feeding stations, first assembly stations, second assembly stations and third assembly stations. The feeding stations are provided with positioning mechanisms for limiting water inlet arms, and the positioning mechanisms are transferred between different stations. The first assembly stations are provided with first assembly mechanisms for assembling sliding covers into connecting seats on the positioning mechanisms. The second assembly stations are provided with second assembly mechanisms for placing water spray arms on the water inlet arms on the positioning mechanisms. The third assembly stations are provided with third assembly mechanisms for screwing lock catches on the water spray arms. The assembly system of the application can automatically assemble the components of the spray arm assembly, improving the assembly efficiency and ensuring the assembly precision.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of dishwashers, and more particularly relates to an assembly system and an assembly method for a spray arm assembly of a dishwasher. BACKGROUND

[0002] A dishwasher is a device for automatically cleaning dishes, chopsticks, plates, bowls, knives, forks, etc. The dishwasher in the prior art generally uses water spraying to wash the dishes. Its working principle is: a built-in spraying device sprays water flow to the dishes to mechanically wash the surface of the dishes, and then sprays a washing liquid to effectively remove dirt from the dishes to achieve the dual effects of cleaning and sterilization. Therefore, the spraying device has a great influence on the washing effect of the entire dishwasher.

[0003] The spraying device generally includes a water spraying arm, a water inlet arm, and other components. Traditional assembly operations use manual assembly, which not only has low assembly efficiency, but also has poor assembly precision, thereby affecting the final washing effect.

[0004] In order to improve the assembly efficiency of the spraying device and ensure the washing effect, through retrieval, the following processing methods can be used for reference:

[0005] 1) Chinese patent CN 210249746 U discloses a spraying arm assembly on a dishwasher and a dishwasher provided with the same. The first buckle and the second buckle are mutually clamped, so that the installation operation between the upper spraying arm and the upper spraying base is simple and fast.

[0006] 2) Chinese patent CN 211324830 U discloses a spraying arm connecting structure for a dishwasher. In the application, the spraying arm and the base are detachably connected through a buckle and a clasp. The stability of the connection between the spraying arm and the dishwasher is enhanced, the spraying arm is prevented from being separated due to excessive speed, and the spraying arm is also convenient to disassemble and assemble.

[0007] 3) Chinese patent CN 216854628 U discloses a dishwasher spraying arm convenient to disassemble and assemble. In the application, an assembly flange is additionally provided on the clasp, and the assembly flange slightly protrudes from the straight pipe and the connector, so as to facilitate the force during installation operation, eliminate the use of tools, and realize convenient disassembly and assembly of the clasp and the connector.

[0008] 4) Chinese patent CN 106821252 A discloses a spraying assembly and a dishwasher provided with the same. The application sets multiple secondary spraying arms on the main spraying arm, so that the spraying assembly has a larger washing range.

[0009] 5) Chinese patent CN 214484444 U discloses a spray arm water guide pipe structure and a dishwasher. The application sets a convex edge protruding towards the sealing gasket at the water guide hole, so that the valve piece of the sealing gasket is tightly attached to the convex edge. To increase the sealing between the valve piece and the convex edge, prevent water leakage between them, and affect the washing effect.

[0010] The above-mentioned patent discloses a technology that gives a solution from different angles on how to improve the assembly efficiency and ensure the washing effect. However, there is no relevant processing technology disclosed for the automatic assembly equipment of the components of the spray device. SUMMARY

[0011] 1. Problems to be solved

[0012] In view of at least some of the problems existing in the above prior art, the present application proposes an assembly system and method for a dishwasher spray arm assembly, which aims to provide an assembly equipment with high automation to solve the problems of low assembly efficiency and poor assembly precision of the spray arm assembly in the prior art, so as to ensure the washing effect of the spray arm assembly.

[0013] 2. Technical solutions

[0014] In order to solve the above-mentioned problems, the technical solutions adopted by the present application are as follows:

[0015] The assembly system for the dishwasher spray arm assembly of the present application comprises an upper feeding station, a first assembly station, a second assembly station and a third assembly station arranged in sequence.

[0016] The upper feeding station is provided with a positioning mechanism for limiting the water inlet arm, and the positioning mechanism is transferred between different stations.

[0017] The first assembly station is provided with a first assembly mechanism for assembling the sliding cover into the connecting seat on the positioning mechanism.

[0018] The second assembly station is provided with a second assembly mechanism for placing the water spray arm on the water inlet arm on the positioning mechanism.

[0019] The third assembly station is provided with a third assembly mechanism for screwing the lock catch on the water spray arm.

[0020] Further, the first assembly mechanism comprises a first connecting block and a first rotary motor arranged on the first connecting block, the first rotary motor is connected with a first clamping piece, and the first clamping piece is driven by a clamping cylinder to clamp and release the sliding cover.

[0021] Further, the second assembling mechanism comprises a first connecting plate, the first connecting plate is connected with a second clamping piece, and the first connecting plate drives the second clamping piece to move in the horizontal and vertical directions.

[0022] Further, the third assembling mechanism comprises a second connecting plate, the second connecting plate is connected with a third clamping piece through a second rotating motor, and the second connecting plate drives the third clamping piece to move in the horizontal and vertical directions.

[0023] Further, the positioning mechanism comprises a mounting seat, the mounting seat is provided with a first positioning block, a second positioning block and a third positioning block; wherein the first positioning block and the second positioning block jointly position the water inlet arm, and the third positioning block is used for positioning the water spraying arm.

[0024] Further, one side of the second assembling station is also provided with a fourth assembling station, and the fourth assembling station is provided with a fourth assembling mechanism for mounting a plug to the water spraying arm, the fourth assembling mechanism comprises a fourth clamping piece and a fourth moving assembly for driving the fourth clamping piece to move; wherein the fourth clamping piece comprises a first lifting block and a suction cup arranged at the bottom of the first lifting block, and the first lifting block is also connected with a second positioning column.

[0025] Further, the detection station is also provided, and the detection station is provided with a detection mechanism for detecting the deflection amount of the assembled water spraying arm assembly, the detection mechanism comprises a first base and a plurality of second bases arranged in a circumferential ring along the first base; wherein the second base is provided with a detection piece, and the first base is provided with a rotating piece, and the rotating piece drives the water spraying arm to rotate under the driving of a driving source.

[0026] Further, the detection piece is a laser range finder, and each second base is provided with two laser range finders; and the rotating piece comprises a rotating block and a limiting rod arranged on the rotating block.

[0027] Further, the detection mechanism further comprises a positioning assembly, the positioning assembly comprises a mounting disc, the mounting disc is provided with a fourth positioning block and a fixing plate, wherein the fourth positioning block is provided with a positioning groove for clamping the connecting seat; and the fixing plate is connected with a clamping piece for positioning the body.

[0028] The application also provides a method for automatically assembling a water spraying arm assembly of a dishwasher, which comprises the following steps,

[0029] S1, first, the positioning mechanism is located at the feeding station, the water inlet arm is placed on the corresponding positioning block of the positioning mechanism, and the positioning operation of the water inlet arm is completed;

[0030] S2, the positioning mechanism moves to the first assembly station, the sliding cover is clamped, transferred and rotated by the first clamping piece, and finally the sliding cover is clamped into the connecting seat;

[0031] S3, the positioning mechanism moves to the second assembly station, the water spraying arm with the plug is clamped and transferred to the water inlet arm by the second clamping piece;

[0032] S4, the positioning mechanism moves to the third assembly station, the lock catch is clamped, transferred and rotated by the third clamping piece, so that the lock catch is screwed on the water spraying arm, and the assembly of the whole water spraying arm assembly is completed;

[0033] S5, the assembled water spraying arm assembly is transferred to the positioning assembly on the detection station for positioning; then, the rotating block drives the water spraying arm to rotate through the limiting rod, so that the two free ends of the water spraying arm pass through different detection points in turn for deflection amount detection;

[0034] S6, the products that pass the detection are transferred to the next process.

[0035] 3, beneficial effects

[0036] Compared with the prior art, the beneficial effects of the present application are:

[0037] (1) The assembly system of the dish-washing machine water spraying arm assembly comprises a feeding station, a first assembly station, a second assembly station and a third assembly station arranged in sequence. First, the sliding cover is assembled into the connecting seat of the water inlet arm by the first assembly mechanism on the first assembly station. Then, the water spraying arm is placed on the water inlet arm by the second assembly mechanism on the second assembly station, and the pre-assembly between the two is completed. Finally, the lock catch is screwed on the water spraying arm by the third assembly mechanism on the third assembly station, to complete the rotatable assembly between the water spraying arm and the water inlet arm. The assembly system of the present application can automatically assemble each component of the water spraying arm assembly, thereby improving the assembly efficiency. In addition, the positioning mechanism can limit the water inlet arm to be assembled, thereby ensuring the stability and precision of the assembly operation.

[0038] (2) The assembly system of the dish-washing machine water spraying arm assembly, through the setting of the fourth assembly mechanism, can realize the automatic assembly between the plug and the water spraying arm, which is also conducive to improving the work efficiency. In addition, through the setting of the second positioning column, the positioning column protrudes into the through hole on the plug before the suction cup clamps and transfers the plug, realizing the reference positioning to ensure the assembly precision between the plug and the water spraying arm in the subsequent operation.

[0039] (3) The assembly system of the dish-washing machine spray arm assembly further comprises a detection mechanism, the spray arm is rotated by rotating the assembly, the two free ends of the spray arm are sequentially subjected to dynamic detection of deflection amount at multiple detection points, so as to simulate the real working state of the spray arm as much as possible, thereby ensuring the reliability of the detection mechanism; meanwhile, each detection point is provided with two detection members, and the two detection members are distributed above and below, so as to detect the upper surface and the lower surface of the spray arm at the same time, and the accuracy of the detection mechanism is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 The overall structural schematic diagram of the assembly system of the dish-washing machine spray arm assembly is improved;

[0041] Figure 2 The structural schematic diagram of the positioning mechanism in embodiment 2 is shown;

[0042] Figure 3 The overall structural schematic diagram of the first assembly mechanism in embodiment 3 is shown;

[0043] Figure 4 The structural schematic diagram of the first clamping assembly in embodiment 3 is shown;

[0044] Figure 5 The schematic diagram of the state of the first clamping member before clamping in embodiment 3 is shown;

[0045] Figure 6 The assembly schematic diagram between the sliding cover and the connecting seat in embodiment 3 is shown;

[0046] Figure 7 The structural schematic diagram of the second assembly mechanism in embodiment 4 is shown;

[0047] Figure 8 The assembly schematic diagram between the spray arm and the water inlet arm in embodiment 4 is shown;

[0048] Figure 9 The structural schematic diagram of the third assembly mechanism in embodiment 5 is shown;

[0049] Figure 10 The assembly schematic diagram between the lock and the spray arm in embodiment 5 is shown;

[0050] Figure 11 The structural schematic diagram of the fourth assembly mechanism in embodiment 6 is shown;

[0051] Figure 12 The structural schematic diagram of the fourth clamping member in embodiment 6 is shown;

[0052] Figure 13 The assembly schematic diagram between the plug and the spray arm in embodiment 6 is shown;

[0053] Figure 14Structure schematic view of detection mechanism in embodiment 7;

[0054] Figure 15 Structure schematic view of rotating assembly in embodiment 7;

[0055] Figure 16 Structure schematic view of detection assembly in embodiment 7;

[0056] Figure 17 Structure schematic view of positioning assembly in embodiment 7;

[0057] Figure 18 Structure schematic view of cooperation between rotating assembly and positioning assembly in embodiment 7;

[0058] Figure 19 Structure schematic view of Figure 14 Enlarged view of part of

[0059] Figure 20 Structure schematic view of spray arm assembly in the application.

[0060] In the figure: 11, water spray arm; 12, water inlet arm; 121, body; 122, connecting seat; 13, sliding cover; 14, lock catch; 15, plug;

[0061] 21, feeding station; 22, first assembly station; 23, second assembly station; 24, third assembly station; 25, fourth assembly station; 26, detection station;

[0062] 3, positioning mechanism; 31, mounting seat; 32, first positioning block; 321, first positioning groove; 33, second positioning block; 331, second positioning groove; 34, third positioning block; 341, third positioning groove;

[0063] 4, first assembly mechanism; 41, first clamping assembly; 411, first connecting block; 412, first rotary motor; 413, clamping cylinder; 414, first clamping piece; 415, first positioning column; 416, limiting part; 42, first moving assembly; 421, support seat; 422, second connecting block; 423, third connecting block;

[0064] 5, second assembly mechanism; 51, first connecting plate; 52, second clamping piece; 53, first mounting plate; 54, second mounting plate;

[0065] 6, third assembly mechanism; 61, second connecting plate; 62, third clamping piece; 63, second rotary motor; 64, third moving assembly;

[0066] 7, fourth assembly mechanism; 71, fourth clamping piece; 711, first lifting block; 712, second positioning column; 72, fourth moving assembly;

[0067] 8. Detection mechanism; 81. Rotating assembly; 811. First base; 8111. Limiting groove; 812. Fourth connecting block; 813. Rotating component; 8131. Third rotary motor; 8132. Rotating block; 8133. Limiting rod; 814. Second lifting block;

[0068] 82. Detection component; 821. Second base; 822. Detection piece;

[0069] 83. Positioning component; 831. Mounting plate; 8311. Rotating table; 8312. Fixing table; 832. Fourth positioning block; 833. Clamping component; 834. Third lifting block; 835. Fixing plate. Detailed Implementation

[0070] refer to Figure 20 As shown, the spray arm assembly of this invention includes a spray arm 11 and a water inlet arm 12. The water inlet arm 12 includes a body 121 and a connecting seat 122 disposed at one end of the body 121. The other end of the body 121 is rotatably connected to the spray arm 11 via a latch 14. Furthermore, a sliding cover 13 is provided inside the connecting seat 122, and a plug 15 is provided on the spray arm 11. This invention provides an assembly system and method for a dishwasher spray arm assembly, aiming to achieve automatic assembly between the various components of the spray arm assembly, improving assembly efficiency while ensuring assembly accuracy.

[0071] The present invention will be further described below with reference to specific embodiments.

[0072] Example 1

[0073] like Figure 1 As shown, an assembly system for a dishwasher spray arm assembly in this embodiment includes a loading station 21, a first assembly station 22, a second assembly station 23, and a third assembly station 24 arranged sequentially.

[0074] The loading station 21 is equipped with a positioning mechanism 3 for limiting the position of the water inlet arm 12, ensuring the stability and accuracy of the assembly operation. Furthermore, the positioning mechanism 3 can be moved between the aforementioned stations to facilitate the completion of the corresponding assembly operations at each station.

[0075] The first assembly station 22 is equipped with a first assembly mechanism 4, which is used to assemble the sliding cover 13 into the connecting seat 122 located on the positioning mechanism 3, so as to complete the automatic assembly between the sliding cover 13 and the water inlet arm 12.

[0076] The second assembly station 23 is equipped with a second assembly mechanism 5 for placing the water spraying arm 11 on the water inlet arm 12 on the positioning mechanism 3 to complete the pre-assembly therebetween.

[0077] The third assembly station 24 is equipped with a third assembly mechanism 6 for screwing the lock catch 14 on the water spraying arm 11 to complete the rotatable assembly between the water spraying arm 11 and the water inlet arm 12.

[0078] The assembly system of the dish washing machine arm assembly of the embodiment can greatly improve the assembly efficiency compared with the traditional manual assembly by sequentially assembling the components of the arm assembly by different assembly mechanisms. In addition, the water inlet arm 12 can be effectively positioned by the positioning mechanism 3, which can improve the precision of the assembly operation.

[0079] Embodiment 2

[0080] Figure 2 As shown, it is an embodiment of the positioning mechanism 3. The positioning mechanism 3 includes a mounting seat 31 which is slidingly arranged on a slide rail extending along the feeding station 21, the first assembly station 22, the second assembly station 23, and the third assembly station 24 to realize the movement between the above stations of the positioning mechanism 3.

[0081] The mounting seat 31 is provided with a first positioning block 32 and a second positioning block 33. The first positioning block 32 is provided with a first positioning groove 321 for the connecting seat 122 to be clamped into. The second positioning block 33 is provided with a second positioning groove 331 for the body 121 to be clamped into. The two positioning grooves can complete the accurate positioning of the water inlet arm 12 and ensure the stability of the water inlet arm 12 during the assembly process.

[0082] Embodiment 3

[0083] The embodiment is an embodiment of the first assembly mechanism 4.

[0084] Reference Figure 3 As shown, the first assembly mechanism 4 includes a first clamping assembly 41 and a first moving assembly 42. The first clamping assembly 41 is used to clamp and adjust the posture of the sliding cover 13. The first moving assembly 42 is used to drive the first clamping assembly 41 to move horizontally and vertically to assist the first clamping assembly 41 to complete the automatic assembly operation of the sliding cover 13.

[0085] Since the sliding cover 13 transferred from another process is horizontally placed; and during the assembly, the sliding cover 13 needs to be in a vertical state (refer to Figure 6). Therefore, the posture of the sliding cover 13 needs to be adjusted before assembly, i.e. from the original horizontal placement to the vertical placement.

[0086] Specifically, as shown in Figure 4 the first clamping assembly 41 comprises a first connecting block 411 connected with the first moving assembly 42. The first connecting block 411 is provided with a first rotary motor 412 connected with a clamping air cylinder 413, and the clamping air cylinder 413 is connected with a first clamping piece 414.

[0087] The clamping air cylinder 413 is used to drive the first clamping piece 414 to clamp and release the sliding cover 13, and the first rotary motor 412 drives the first clamping piece 414 to rotate to complete the posture adjustment of the sliding cover 13.

[0088] As shown in Figure 5 the first clamping piece 414 comprises two clamping arms oppositely arranged, and a first positioning column 415 is arranged between the two clamping arms. Before the clamping operation of the clamping arms, the first positioning column 415 is inserted into the water inlet connector on the sliding cover 13 to achieve basic positioning and ensure the accuracy of the clamping operation.

[0089] The opposite side of the two clamping arms has an arc-shaped clamping portion. Preferably, the arc surface of the clamping portion is adapted to the outer peripheral wall of the water inlet connector, so as to ensure the stability of the clamping of the water inlet connector by the first clamping piece 414.

[0090] The first positioning column 415 is a cylinder body adapted to the water inlet connector, and the first positioning column 415 is provided with a limiting portion 416. By providing the limiting portion 416, it can be effectively prevented that the part of the first positioning column 415 inserted into the water inlet connector (this part is also called a positioning part) is too much to cause damage to the inner wall of the cavity of the sliding cover 13.

[0091] Preferably, the length of the positioning part of the first positioning column 415 is comparable to the length of the water inlet connector. That is, when the positioning part is fully inserted into the water inlet connector, the limiting portion 416 just contacts the end surface of the water inlet connector. At this time, the two clamping arms are respectively located on both sides of the water inlet connector, and do not interfere with the outer wall of the sliding cover 13, so as to ensure the smooth clamping operation of the clamping arms.

[0092] Reference Figure 3As shown, the first moving assembly 42 comprises a supporting base 421, on which a second connecting block 422 is slidingly arranged in a horizontal direction. The second connecting block 422 is connected with a third connecting block 423, on which the first connecting block 411 of the first clamping assembly 41 is slidingly arranged in a vertical direction, so as to drive the first clamping piece 414 to approach the sliding cover 13 to be clamped.

[0093] In addition, the third connecting block 423 can also be slidingly arranged on the second connecting block 422 in a horizontal direction perpendicular to the sliding direction of the second connecting block 422. Normally, when the second connecting block 422 drives the first clamping assembly 41 to move to the position, the first clamping piece 414 is just located above the sliding cover 13 to be clamped. However, after long-term operation, a small amount of misalignment may occur between the two, at which time the third connecting block 423 can be used for fine adjustment to ensure the accuracy of the clamping operation.

[0094] Of course, in the present embodiment, each connecting block that needs to be moved is connected with a corresponding driving source, which can be selected from existing driving devices, as long as it can realize the corresponding function and can be used in the present embodiment, such as a cylinder.

[0095] Embodiment 4

[0096] The present embodiment is an embodiment of the second assembling mechanism 5.

[0097] Reference Figure 7 、 Figure 8 As shown, the second assembling mechanism 5 comprises a first connecting plate 51 connected with a second clamping piece 52. The first connecting plate 51 is also connected with a second moving assembly, which drives the first connecting plate 51 to move in horizontal and vertical directions.

[0098] The second clamping piece 52 comprises oppositely arranged clamping arms, which are driven by corresponding clamping cylinders to complete the clamping and releasing operations of the water spraying arm 11.

[0099] The second moving assembly comprises a first mounting plate 53 and a second mounting plate 54 slidingly arranged on the first mounting plate 53. The first connecting plate 51 is slidingly arranged on the second mounting plate 54. The sliding direction of the second mounting plate 54 is horizontal, and the sliding direction of the first connecting plate 51 is vertical.

[0100] Of course, the movement of the first connecting plate 51 and the second mounting plate 54 is driven by a respective driving source. It should be noted that existing driving devices and driving structures can be used in the present embodiment as long as they can meet the corresponding movement requirements, which will not be listed one by one here.

[0101] Embodiment 5

[0102] This embodiment is an implementation of the third assembling mechanism 6.

[0103] Referring to Figure 9 、 Figure 10 , the third assembling mechanism 6 includes a second connecting plate 61, and a third clamping piece 62 is connected to the second connecting plate 61 through a second rotating motor 63 to complete the rotating operation on the lock catch 14.

[0104] The second connecting plate 61 is connected with a third moving assembly 64, which drives the second connecting plate 61 to move in horizontal and vertical directions. The specific structure of the third moving assembly 64 is the same as that of the second moving assembly, which will not be repeated here.

[0105] The third clamping piece 62 includes oppositely arranged clamping arms, which are driven by corresponding clamping cylinders to complete the clamping and releasing operation on the lock catch 14.

[0106] In addition, in this embodiment, the mounting seat 31 of the positioning mechanism 3 is further provided with a third positioning block 34, and a third positioning groove 341 for clamping the water spraying arm 11 is formed in the third positioning block 34. The third positioning groove 341 can limit the water spraying arm 11 to prevent the lock catch 14 from rotating the water spraying arm 11 during the screwing process, thereby affecting the assembly operation between them.

[0107] Embodiment 6

[0108] Since the plug 15 needs to be installed on the water spraying arm 11 before the water spraying arm 11 is assembled with the water inlet arm 12, in order to further improve the automation degree of the entire spray arm assembly assembly, a fourth assembling station 25 is further provided in the assembly system of the dish-washing machine spray arm assembly of this embodiment on the basis of the above-mentioned embodiments. The fourth assembling station 25 is arranged on one side of the second assembling station 23, and the fourth assembling station 25 is provided with a fourth assembling mechanism 7 for installing the plug 15 on the water spraying arm 11.

[0109] Referring to Figure 11 , the fourth assembling mechanism 7 includes a fourth clamping piece 71 and a fourth moving assembly 72 for driving the fourth clamping piece 71 to move horizontally and vertically to assist the fourth clamping piece 71 to complete the assembly operation on the plug 15.

[0110] As Figure 12 、 Figure 13As shown, the fourth clamping piece 71 comprises a first lifting block 711 and a second positioning column 712 arranged at the bottom of the first lifting block 711. The first lifting block 711 is connected with a lifting cylinder for driving the first lifting block 711 to move up and down; and the bottom of the first lifting block 711 is further provided with a suction cup for adsorbing and clamping the plug 15.

[0111] The assembly system of the dish-washing machine spray arm assembly of the embodiment can realize the reference positioning by the arrangement of the second positioning column 712 before the suction cup adsorbs and clamps the plug 15, that is, the second positioning column 712 first extends into the through hole on the plug 15, so as to ensure the assembly precision between the plug 15 and the water spraying arm 11 in the subsequent operation.

[0112] In addition, the specific structure of the fourth moving assembly 72 in the embodiment can refer to the moving assembly in the above-mentioned embodiment or other structure forms in the prior art, as long as the corresponding functions can be realized, and there is no other specific limitation.

[0113] Embodiment 7

[0114] Since the water spraying arm 11 is in a rotating state during the operation of the spray arm assembly, the difference in the amount of deflection of the water spraying arm 11 itself will not only affect the final washing effect, but also increase the noise and accelerate the wear between components. The embodiment aims to provide a detection mechanism to dynamically detect the amount of deflection of the water spraying arm 11 and timely select unqualified products. Thus, the washing effect of the dish-washing machine is ensured, and the service life of the dish-washing machine is prolonged.

[0115] Reference Figure 1 As shown, a detection station 26 is arranged near the fourth assembly station 25, and the detection station 26 is equipped with a detection mechanism 8 for detecting the amount of deflection of the assembled spray arm assembly.

[0116] Specifically, as shown, Figure 14 The detection mechanism 8 comprises a rotating assembly 81 and a detection assembly 82. The detection assembly 82 is arranged along the circumference of the rotating assembly 81 to form multiple detection points.

[0117] The rotating assembly 81 is used to drive the water spraying arm 11 to rotate, so that the two free ends of the water spraying arm 11 pass through the multiple detection points in sequence for dynamic detection, so as to determine whether the amount of deflection of the water spraying arm 11 meets the requirements.

[0118] Specifically referring to Figure 15 , Figure 18As shown, the rotating assembly 81 includes a first base 811 and a fourth connecting block 812 slidably disposed on the first base 811. Preferably, the two can be slidably engaged by a sliding rail and a slider, and the sliding direction of the fourth connecting block 812 is vertical.

[0119] The fourth connecting block 812 is connected to a second lifting block 814 on one side. One end of the second lifting block 814 passes through the first base 811 and is connected to a lifting cylinder. The lifting cylinder is set on the first base 811. The other side of the fourth connecting block 812 is connected to a rotating component 813, which is used to drive the water spray arm 11 to rotate.

[0120] The rotating component 813 includes a third rotating motor 8131 and a rotating block 8132 connected to the third rotating motor 8131, and the rotating block 8132 is provided with a plurality of limiting rods 8133. The plurality of limiting rods 8133 together form a limiting space for the water spray arm 11 to be inserted.

[0121] In addition, to prevent the rotating block 8132 from moving upward too much, causing interference between the rotating block 8132 and the water spray arm 11, thus affecting the normal rotation of the water spray arm 11.

[0122] The first base 811 is provided with a limiting groove 8111 for limiting the movement of the second lifting block 814. That is, when the second lifting block 814 moves to the highest point of the limiting groove 8111, the limiting rod 8133 can just lock the water spray arm 11, and there is a certain space between the rotating block 8132 and the water spray arm 11, so there is no interference between the two.

[0123] like Figure 14 , Figure 16 As shown, the detection component 82 includes a second base 821 and a detection element 822 disposed on the second base 821. Specifically, in this embodiment, four detection components 82 are provided and evenly distributed in a ring, and the detection element 822 is a laser rangefinder. The sway is determined by detecting the height difference between the free end of the water spray arm 11 and the reference plane at different detection points.

[0124] Preferably, the second base 821 is provided with two detection elements 822, which are arranged vertically, and the free end of the water spray arm 11 passes through the gap between the two detection elements 822. Since the water spray arm 11 is assembled from two shells, using a single laser rangefinder to detect only one side cannot guarantee the accuracy of the detection. Therefore, in this embodiment, two laser rangefinders are used to detect the upper and lower surfaces of the water spray arm 11 respectively, thereby ensuring the reliability of the detection results.

[0125] The assembling system of the dish-washing machine spray arm assembly of the embodiment can detect the deflection amount of the spray arm 11 dynamically by setting four detection points, and can simulate the real working state of the spray arm 11 as much as possible, so as to ensure the reliability of the detection structure. Two laser distance meters are arranged at each detection point, and the upper surface and the lower surface of the spray arm 11 are detected at the same time, so as to further ensure the accuracy of the detection structure.

[0126] In addition, in order to prevent the spray arm assembly from shaking during the detection process, thereby affecting the detection result, the assembling system of the dish-washing machine spray arm assembly of the embodiment further comprises a positioning assembly 83 for limiting the spray arm assembly.

[0127] Specifically, referring to Fig. 1, Figure 14 the positioning assembly 83 comprises a mounting disc 831, and the mounting disc 831 comprises a rotating table 8311 and a fixed table 8312 arranged at the center of the rotating table 8311.

[0128] The rotating table 8311 is provided with a fourth positioning block 832, and the fourth positioning block 832 is provided with a profiled positioning groove for clamping the connecting seat 122, so as to realize the overall positioning of the spray arm assembly.

[0129] During the working process, the rotating table 8311 rotates, the fourth positioning block 832 drives the spray arm assembly to the upper side of the rotating assembly 81, and then the rotating assembly 81 drives the spray arm 11 to rotate for deflection amount detection.

[0130] Preferably, a plurality of fourth positioning blocks 832 are arranged in a ring shape and are uniformly distributed, so that when one fourth positioning block 832 is used for deflection amount detection, the fourth positioning blocks 832 located at other workstations can perform other corresponding operations, thereby improving the working efficiency.

[0131] In order to further ensure the stability of the spray arm assembly during the detection process, the specific structure of the positioning assembly 83 is further optimized in the embodiment.

[0132] As shown in Fig. 1, Figure 17 the positioning assembly 83 further comprises a fixed plate 835, and the fixed plate 835 is connected with a clamping member 833 for clamping and limiting the body 121 of the water inlet arm 12.

[0133] Specifically, the fixing plate 835 is in the shape of an inverted L as a whole, one end of which is arranged on the fixing table 8312, and the other end of which is connected with the third lifting block 834 across the fourth positioning block 832. The third lifting block 834 is slidingly arranged on the fixing plate 835, and the up-down movement of the third lifting block 834 is driven by the corresponding air cylinder. The third lifting block 834 is connected with a clamping air cylinder, which is used to drive the clamping piece 833 to perform clamping and loosening operations.

[0134] In addition, as shown in Figure 14 , Figure 19 In the embodiment, the two second bases 821 close to the mounting disc 831 are divided into upper and lower parts, and each of the corresponding positions on the two parts is provided with a detection piece 822. The upper part is arranged on the fixing table 8312, and the lower part is arranged on the ground. In this way, a passage for the water inlet arm 12 to pass through is formed between the upper and lower parts of the second base 821, so as to prevent interference with the movement of the spray arm assembly. The other two second bases 821 away from the mounting disc 831 can directly adopt a stand column, and a cross bar is arranged on the stand column to install the detection piece 822 (see Figure 16 ).

[0135] Embodiment 8

[0136] The embodiment provides an assembly method of a spray arm assembly of a dishwasher, which comprises the following steps:

[0137] Assembly of the sliding cover

[0138] Firstly, the positioning mechanism 3 is stopped at the feeding station 21; the connecting seat 122 and the body 121 of the water inlet arm 12 are respectively clamped into the corresponding positioning grooves, so as to complete the positioning of the water inlet arm 12.

[0139] Then, the positioning mechanism 3 is moved to the first assembly station 22, the sliding cover 13 is clamped, transferred and rotated by the first clamping piece 414, and finally the sliding cover 13 is clamped into the connecting seat 122; before clamping, the first positioning column 415 is first inserted into the water inlet connector on the sliding cover 13 to position.

[0140] Assembly of the plug

[0141] The fourth clamping piece 71 is moved above the plug 15 and is lowered, the second positioning column 712 is first inserted into the through hole on the plug 15, and then the plug 15 is clamped and grabbed by the suction cup; then the fourth clamping piece 71 is moved above the water spraying arm 11 and is lowered, and the plug 15 is installed on the water spraying arm 11.

[0142] Assembly of the water inlet arm

[0143] The positioning mechanism 3 moves to the second assembly station 23, the water spraying arm 11 with the installed plug is clamped by the second clamping member 52 and transferred to the water inlet arm 12, and the pre-assembly between the two is completed;

[0144] Then, the positioning mechanism 3 moves to the third assembly station 24, the lock catch 14 is clamped, transferred and rotated by the third clamping member 62, the lock catch 14 is screwed on the water spraying arm 11, the assembly operation between the water spraying arm 11 and the water inlet arm 12 is completed, and the assembly of the whole water spraying arm assembly is completed.

[0145] Deflection amount detection

[0146] The assembled water spraying arm assembly is transferred to the fourth positioning block 832 of the detection mechanism 8, and the whole positioning is completed;

[0147] Then, the rotating table 8311 drives the water spraying arm assembly to rotate to the upper side of the rotating member 813, and then the body 121 of the water inlet arm is clamped and limited by the clamping member 833;

[0148] Subsequently, the rotating member 813 moves upward, the water spraying arm 11 is clamped by the limiting rod 8133, then the third rotating motor 8131 is started, the limiting rod 8133 is driven to rotate by the rotating block 8132, and then the water spraying arm 11 is driven to rotate, so that the two free ends of the water spraying arm 11 pass through each detection point in turn, and the deflection amount detection is performed;

[0149] Finally, the water spraying arm assembly that passes the detection is transferred to the next process.

[0150] The above description of the present application and its embodiments is illustrative and not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, similar structural forms and embodiments can be designed without creativity, which should belong to the protection scope of the present application.

Claims

1. An assembly system for a dishwasher spray arm assembly, characterized in that: It includes a material loading station (21), a first assembly station (22), a second assembly station (23), and a third assembly station (24) set up in sequence. The loading station (21) is equipped with a positioning mechanism (3) for limiting the water inlet arm (12), and the positioning mechanism (3) is transferred between different stations; The first assembly station (22) is equipped with a first assembly mechanism (4) for assembling the sliding cover (13) into the connecting seat (122) located on the positioning mechanism (3); The second assembly station (23) is equipped with a second assembly mechanism (5) for placing the water spray arm (11) on the water inlet arm (12) on the positioning mechanism (3); The third assembly station (24) is equipped with a third assembly mechanism (6) for screwing the latch (14) onto the spray arm (11). It also includes a testing station (26), which is equipped with a testing mechanism (8) for testing the sway of the assembled spray arm assembly. The testing station (26) includes a first base (811) and a plurality of second bases (821) arranged circumferentially around the first base (811). The second bases (821) are provided with testing components (822), and the first bases (811) are provided with rotating components (813). The rotating components (813) drive the spray arm (11) to rotate under the drive of the driving source. The detection component (822) is a laser rangefinder, and each second base (821) is provided with two laser rangefinders; the rotating component (813) includes a rotating block (8132) and a limiting rod (8133) provided on the rotating block (8132). The detection mechanism (8) further includes a positioning component (83), which includes a mounting plate (831). The mounting plate (831) is provided with a fourth positioning block (832) and a fixing plate (835). The fourth positioning block (832) is provided with a positioning groove for the connecting seat (122) to be inserted. The fixing plate (835) is connected to a clamping member (833) for positioning the body (121).

2. The assembly system for a dishwasher spray arm assembly according to claim 1, characterized in that: The first assembly mechanism (4) includes a first connecting block (411) and a first rotary motor (412) disposed on the first connecting block (411). The first rotary motor (412) is connected to a first clamping member (414), which is driven by a clamping cylinder (413) to perform clamping and releasing operations on the sliding cover (13).

3. The assembly system for a dishwasher spray arm assembly according to claim 2, characterized in that: The second assembly mechanism (5) includes a first connecting plate (51), which is connected to a second clamping member (52), and the first connecting plate (51) drives the second clamping member (52) to move horizontally and vertically.

4. The assembly system for a dishwasher spray arm assembly according to claim 3, characterized in that: The third assembly mechanism (6) includes a second connecting plate (61), which is connected to a third clamping member (62) via a second rotary motor (63). The second connecting plate (61) drives the third clamping member (62) to move horizontally and vertically.

5. The assembly system for a dishwasher spray arm assembly according to claim 4, characterized in that: The positioning mechanism (3) includes a mounting base (31), on which a first positioning block (32), a second positioning block (33) and a third positioning block (34) are provided; wherein the first positioning block (32) and the second positioning block (33) jointly position the water inlet arm (12), and the third positioning block (34) is used to position the water spray arm (11).

6. The assembly system for a dishwasher spray arm assembly according to claim 5, characterized in that: A fourth assembly station (25) is also provided on one side of the second assembly station (23), and the fourth assembly station (25) is equipped with a fourth assembly mechanism (7) for installing the plug (15) onto the spray arm (11), which includes a fourth clamping component (71) and a fourth moving component (72) for moving the fourth clamping component (71); wherein, the fourth clamping component (71) includes a first lifting block (711) and a suction cup provided at the bottom of the first lifting block (711), and the first lifting block (711) is also connected to a second positioning post (712).

7. A method for automatically assembling dishwasher spray arm assemblies using the assembly system of claim 6, characterized in that: Includes the following steps, S1. First, the positioning mechanism (3) is located at the loading station (21) and places the water inlet arm (12) on the corresponding positioning block on the positioning mechanism (3) to complete the positioning operation of the water inlet arm (12). S2. The positioning mechanism (3) moves to the first assembly station (22), and the first clamping component (414) clamps, transfers and rotates the sliding cover (13), and finally inserts the sliding cover (13) into the connecting seat (122); S3. The positioning mechanism (3) moves to the second assembly station (23), and the second clamping part (52) clamps the water spray arm (11) with the plug (15) installed and transfers it to the water inlet arm (12); S4. The positioning mechanism (3) moves to the third assembly station (24), and the third clamping part (62) clamps, transfers and rotates the latch (14) so ​​that the latch (14) is screwed onto the spray arm (11), thus completing the assembly of the entire spray arm assembly. S5. The assembled spray arm assembly is transferred to the positioning assembly (83) on the testing station (26) for positioning; then, the rotating block (8132) drives the spray arm (11) to rotate through the limiting rod (8133), so that the two free ends of the spray arm (11) pass through different testing points in sequence to detect the sway. S6. Transfer the qualified products to the next process.

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