An automatic assembling device for automobile parts

Abstract

The application relates to the technical field of automobile part assembly, in particular to an automobile part automatic assembly equipment which comprises a base, a mounting seat, a first feeding disc, a second feeding disc, a third feeding disc, a first hydraulic mechanism and a second hydraulic mechanism, the base is fixedly installed with a first mounting frame and a second mounting frame, the mounting seat is fixed on the base through supporting legs, the mounting seat is rotationally installed with a first rotating shaft, a second rotating shaft and a third rotating shaft, and the first feeding disc is fixed on the first rotating shaft; the automobile part automatic assembly equipment is composed of the base, the mounting seat, the first feeding disc, the second feeding disc, the third feeding disc, the first hydraulic mechanism and the second hydraulic mechanism, first workpieces, second workpieces and third workpieces are respectively positioned through the first feeding disc, the second feeding disc and the third feeding disc, the first workpieces, the second workpieces and the third workpieces are synchronously pressed together, and the overall machining efficiency of the equipment is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts assembly technology, specifically to an automated automotive parts assembly device. Background Technology

[0002] Component assembly is a core link in the manufacturing and engineering fields. It refers to the process of combining multiple independent and scattered components into a component, subsystem or final product with specific functions by connecting, fixing and calibrating them according to the preset design specifications, technical requirements and assembly sequence. A Chinese patent document with publication number CN223223886U discloses an automatic coding assembly and welding fixture for precision injection molding of automotive parts. The fixture includes a worktable, a flange storage rack, a pre-compression mechanism, and a welding machine. A first robotic arm is mounted on the upper surface of the worktable. A rotary table is mounted on one side of the first robotic arm, and a coding station is located on the other side of the first robotic arm. A coding device is installed at the coding station. A material feeding station is located at one end of the rotary table, and a gripping station is located at the other end. The flange storage rack is located on one side of the worktable and has a material picking station. A material handling and transfer mechanism is provided on one side of the material handling station, and a positioning fixture is provided on one side of the material handling and transfer mechanism; a second robotic arm for gripping flanges is installed between the worktable and the flange storage rack, a waiting box for collecting flanges is installed on one side of the second robotic arm, and a CCD inspection camera for inspecting flanges is installed on the other side of the second robotic arm; an angle rotation station is installed directly below the pre-pressing mechanism; a welding station is provided on one side of the welding machine, a welding fixture is installed on the welding station, a synchronous transfer mechanism is installed between the welding station and the angle rotation station, and a sensor for inspecting workpieces is installed on one side of the welding fixture; However, the above solutions require high-precision robotic arms to pick up and place workpieces, resulting in high overall equipment costs and high daily maintenance costs, which leads to increased production costs. Therefore, this invention proposes an automatic assembly equipment for automotive parts to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide an automated assembly equipment for automotive parts to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic assembly equipment for automotive parts, comprising: A base, on which a primary mounting bracket and a secondary mounting bracket are fixedly installed; Mounting base, which is fixed to the base by support legs, and a primary rotating shaft, a secondary rotating shaft and a tertiary rotating shaft are rotatably mounted on the mounting base; A primary feeding tray is fixed on a primary rotating shaft, and a primary material loading groove is provided on the primary feeding tray for placing the first workpiece. A secondary feeding tray is fixed on a secondary rotating shaft, and a secondary material loading groove is provided on the secondary feeding tray for placing the second workpiece. The three-stage feeding tray is fixed on the three-stage rotating shaft and has a three-stage material loading groove, which is used to place the third workpiece. A primary hydraulic mechanism is fixedly mounted on a primary mounting frame, and a bearing seat is fixedly mounted on the telescopic part of the primary hydraulic mechanism. A secondary hydraulic mechanism is fixedly mounted on a secondary mounting bracket, and a press-fitting seat is fixedly mounted on the telescopic part of the secondary hydraulic mechanism.

[0005] Preferably, a primary feeding conveyor belt is fixedly installed on the base via a primary support, and the primary feeding conveyor belt is used to transport the first workpiece to the primary loading trough. A secondary feeding conveyor belt is fixedly installed on the base via a secondary support, and the secondary feeding conveyor belt is used to transport the second workpiece to the secondary loading trough. A tertiary feeding conveyor belt is fixedly installed on the base via a tertiary support, and the tertiary feeding conveyor belt is used to transport the third workpiece to the tertiary loading trough.

[0006] Preferably, a set of primary, secondary, and tertiary material troughs are symmetrically arranged. When the primary, secondary, and tertiary material troughs on the outer side of the primary, secondary, and tertiary feeding discs rotate to the corresponding feeding conveyor belt, the primary, secondary, and tertiary material troughs on the inner side of the primary, secondary, and tertiary feeding discs are on the same axis.

[0007] Preferably, the dimensions of the first workpiece, the second workpiece, and the third workpiece are matched with the dimensions of the primary material loading tank, the secondary material loading tank, and the tertiary material loading tank, respectively. The diameters of the primary material loading tank, the secondary material loading tank, and the tertiary material loading tank are set in a decreasing trend, and the diameter of the pressing seat is smaller than the diameter of the tertiary material loading tank.

[0008] Preferably, after the secondary hydraulic mechanism moves, the pressing seat applies downward pressure to the third workpiece, so that the first workpiece, the second workpiece, and the third workpiece are pressed together.

[0009] Preferably, a servo motor is fixedly mounted on the base, a transmission gear is fixedly mounted on the output shaft of the servo motor, a first-stage driven gear is fixedly mounted on the lower end of the first-stage rotating shaft, a second-stage driven gear is fixedly mounted on the lower end of the second-stage rotating shaft, and a third-stage driven gear is fixedly mounted on the lower end of the third-stage rotating shaft. The first-stage, second-stage, and third-stage driven gears are of the same type, and all three gears mesh with the transmission gear.

[0010] Preferably, a primary clearance groove is provided on the side wall of the primary material loading trough, and a primary support is integrally formed on the side wall of the primary clearance groove. The primary support is L-shaped and made of spring steel. When the first workpiece is placed in the primary material loading trough, the first workpiece is placed on the primary support.

[0011] Preferably, the secondary material loading trough has a secondary clearance groove on its side wall, and a secondary support is integrally formed on the side wall of the secondary clearance groove. The tertiary material loading trough has a tertiary clearance groove on its side wall, and a tertiary support is integrally formed on the side wall of the tertiary clearance groove. The shape and material of the secondary and tertiary supports are the same as those of the primary support. When the second and third workpieces are placed in the secondary and tertiary clearance grooves, the second and third workpieces are respectively supported on the secondary and tertiary supports. There are six primary, secondary, and tertiary clearance grooves evenly arranged around the material loading trough, and each clearance groove has a support.

[0012] Preferably, when the first workpiece is actually placed, the lower surface of the first workpiece is higher than the lower surface of the first-stage feed tray, and the upper surface of the first workpiece is lower than the upper surface of the first-stage feed tray; the lower surface of the second workpiece is higher than the lower surface of the second-stage feed tray, and the upper surface of the second workpiece is lower than the upper surface of the second-stage feed tray; the lower surface of the third workpiece is higher than the lower surface of the third-stage feed tray, and the upper surface of the third workpiece is lower than the upper surface of the third-stage feed tray.

[0013] Preferably, the cross-section of the bearing seat is a right trapezoid, and a guide plate is fixedly installed on the side of the mounting seat. After the first-stage hydraulic mechanism moves, the upper surface of the bearing seat is located directly below the pressing seat. After the first-stage hydraulic mechanism returns and the second-stage hydraulic mechanism moves, the pressed workpiece falls onto the inclined surface of the bearing seat and slides down the inclined surface of the bearing seat onto the guide plate, and flows along the guide plate to the unloading mechanism.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up an automatic assembly equipment for automotive parts, which consists of a base, a mounting base, a primary feeding plate, a secondary feeding plate, a tertiary feeding plate, a primary hydraulic mechanism, and a secondary hydraulic mechanism, the first workpiece, the second workpiece, and the third workpiece are positioned separately by the primary feeding plate, the secondary feeding plate, and the tertiary feeding plate, so that the first workpiece, the second workpiece, and the third workpiece are pressed together synchronously, thereby effectively improving the overall processing efficiency of the equipment; 2. By symmetrically setting a set of material loading grooves on the primary, secondary, and tertiary feeding trays, the equipment can simultaneously feed the first, second, and third workpieces while pressing them together, thereby further improving the actual processing efficiency of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 3 This is a half-sectional view of the present invention; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point B; Figure 5 This is a schematic diagram showing the positions of the primary, secondary, and tertiary material loading tanks of the present invention. Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point C; Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point D; Figure 8 This is a schematic diagram showing the distribution of the primary feeding tray, secondary feeding tray, and tertiary feeding tray of the present invention.

[0016] In the diagram: 1. Base; 2. Mounting seat; 3. Primary feeding tray; 4. Secondary feeding tray; 5. Tertiary feeding tray; 6. Primary hydraulic mechanism; 7. Secondary hydraulic mechanism; 8. Support leg; 9. Primary rotating shaft; 10. Secondary rotating shaft; 11. Tertiary rotating shaft; 12. Primary loading trough; 13. Secondary loading trough; 14. Primary loading conveyor belt; 15. Secondary loading conveyor belt; 16. Tertiary loading conveyor belt; 17. Primary mounting frame; 18. Bearing seat; 19. Secondary mounting frame; 20. Pressing seat; 21. Guide plate; 22. Servo motor; 23. Transmission gear; 24. Primary driven gear; 25. Secondary driven gear; 26. Tertiary driven gear; 27. First workpiece; 28. Secondary workpiece; 29. ​​Third workpiece; 30. Primary clearance groove; 31. Primary support seat; 32. Secondary clearance groove; 33. Secondary support seat; 34. Tertiary clearance groove; 35. Tertiary support seat; 36. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-8 The present invention provides the following three preferred embodiments: Example 1: An automatic assembly equipment for automotive parts includes a base 1, a mounting base 2, a primary feeding tray 3, a secondary feeding tray 4, a tertiary feeding tray 5, a primary hydraulic mechanism 6, and a secondary hydraulic mechanism 7. A primary mounting bracket 18 and a secondary mounting bracket 20 are fixedly mounted on the base 1. The mounting base 2 is fixed to the base 1 via support legs 8. A primary rotating shaft 9, a secondary rotating shaft 10, and a tertiary rotating shaft 11 are rotatably mounted on the mounting base 2. The primary feeding tray 3 is fixed to the primary rotating shaft 9 and has a primary loading groove 12 for placing a first workpiece 28. The secondary feeding tray 4 is fixed to the secondary rotating shaft 10 and has a secondary loading groove 13 for placing a second workpiece 29. The tertiary feeding tray 5 is fixed to the tertiary rotating shaft 11 and has three... The first-stage material loading trough 14 and the third-stage material loading trough 14 are used to load the third workpiece 30. The first-stage hydraulic mechanism 6 is fixedly installed on the first-stage mounting frame 18. The bearing seat 19 is fixedly installed on the telescopic part of the first-stage hydraulic mechanism 6. The second-stage hydraulic mechanism 7 is fixedly installed on the second-stage mounting frame 20. The pressing seat 21 is fixedly installed on the telescopic part of the second-stage hydraulic mechanism 7. By setting up an automatic assembly equipment for automotive parts composed of a base 1, a mounting seat 2, a first-stage feeding plate 3, a second-stage feeding plate 4, a third-stage feeding plate 5, a first-stage hydraulic mechanism 6, and a second-stage hydraulic mechanism 7, the first workpiece 28, the second workpiece 29, and the third workpiece 30 are positioned separately by the first-stage feeding plate 3, the second-stage feeding plate 4, and the third-stage feeding plate 5, so that the first workpiece 28, the second workpiece 29, and the third workpiece 30 are pressed together synchronously, thereby effectively improving the overall processing efficiency of the equipment.

[0019] A primary feeding conveyor belt 15 is fixedly installed on the base 1 via a primary support. The primary feeding conveyor belt 15 is used to transport the first workpiece 28 to the primary loading trough 12. A secondary feeding conveyor belt 16 is fixedly installed on the base 1 via a secondary support. The secondary feeding conveyor belt 16 is used to transport the second workpiece 29 to the secondary loading trough 13. A tertiary feeding conveyor belt 17 is fixedly installed on the base 1 via a tertiary support. The tertiary feeding conveyor belt 17 is used to transport the third workpiece 30 to the tertiary loading trough 14.

[0020] Example 2: Please refer to Figure 1-4 Based on Embodiment 1, a set of primary material trough 12, secondary material trough 13, and tertiary material trough 14 are symmetrically arranged. When the primary material trough 12, secondary material trough 13, and tertiary material trough 14 on the outer side of the primary feeding plate 3, secondary feeding plate 4, and tertiary feeding plate 5 rotate to the corresponding feeding conveyor belt, the primary material trough 12, secondary material trough 13, and tertiary material trough 14 on the inner side of the primary feeding plate 3, secondary feeding plate 4, and tertiary feeding plate 5 are on the same axis.

[0021] The dimensions of the first workpiece 28, the second workpiece 29, and the third workpiece 30 are respectively matched with the dimensions of the first-level material loading tank 12, the second-level material loading tank 13, and the third-level material loading tank 14. The diameters of the first-level material loading tank 12, the second-level material loading tank 13, and the third-level material loading tank 14 are set in a decreasing trend. The diameter of the pressing seat 21 is smaller than the diameter of the third-level material loading tank 14.

[0022] After the secondary hydraulic mechanism 7 moves, the pressing seat 21 applies downward pressure to the third workpiece 30, so that the first workpiece 28, the second workpiece 29, and the third workpiece 30 are pressed together. By symmetrically arranging a set of material loading grooves on the primary feeding plate 3, the secondary feeding plate 4, and the tertiary feeding plate 5, the equipment can simultaneously feed the first workpiece 28, the second workpiece 29, and the third workpiece 30 while pressing them together, thereby further improving the actual processing efficiency of the equipment.

[0023] A servo motor 23 is fixedly mounted on the base 1. A transmission gear 24 is fixedly mounted on the output shaft of the servo motor 23. A first-stage driven gear 25 is fixedly mounted on the lower end of the first-stage rotating shaft 9. A second-stage driven gear 26 is fixedly mounted on the lower end of the second-stage rotating shaft 10. A third-stage driven gear 27 is fixedly mounted on the lower end of the third-stage rotating shaft 11. The first-stage driven gear 25, the second-stage driven gear 26, and the third-stage driven gear 27 are of the same model, and all three gears mesh with the transmission gear 24. This facilitates the synchronous driving of the first-stage feeding disc 3, the second-stage feeding disc 4, and the third-stage feeding disc 5 through a single drive structure, thereby effectively optimizing the power source of the device.

[0024] Example 3: Please refer to Figure 3-7 Based on Embodiment 2, a primary clearance groove 31 is provided on the side wall of the primary material loading groove 12. A primary support 32 is integrally formed on the side wall of the primary clearance groove 31. The primary support 32 is L-shaped and is made of spring steel. When the first workpiece 28 is placed in the primary material loading groove 12, the first workpiece 28 is placed on the primary support 32.

[0025] A secondary clearance groove 33 is formed on the side wall of the secondary material loading trough 13, and a secondary support 34 is integrally formed on the side wall of the secondary clearance groove 33. A tertiary clearance groove 35 is formed on the side wall of the tertiary material loading trough 14, and a tertiary support 36 is integrally formed on the side wall of the tertiary clearance groove 35. The shape and material of the secondary support 34 and the tertiary support 36 are the same as those of the primary support 32. The second workpiece 29 and the third workpiece 30 are placed in the secondary clearance groove 33 and the tertiary clearance groove 35. During this process, the second workpiece 29 and the third workpiece 30 are placed on the secondary support 34 and the tertiary support 36, respectively. The primary clearance groove 31, the secondary clearance groove 33, and the tertiary clearance groove 35 are all evenly arranged around the material loading groove, and each clearance groove is equipped with a support. The arrangement of the primary support 32, the secondary support 34, and the tertiary support 36 can facilitate the positioning of the first workpiece 28, the second workpiece 29, and the third workpiece 30, and facilitate the workpieces to pass through the material loading groove during unloading.

[0026] When the first workpiece 28 is actually placed, its lower surface is higher than the lower surface of the first-stage feed tray 3, and its upper surface is lower than the upper surface of the first-stage feed tray 3. The lower surface of the second workpiece 29 is higher than the lower surface of the second-stage feed tray 4, and its upper surface is lower than the upper surface of the second-stage feed tray 4. The lower surface of the third workpiece 30 is higher than the lower surface of the third-stage feed tray 5, and its upper surface is lower than the upper surface of the third-stage feed tray 5, so as to avoid interference between the workpiece and the feed tray.

[0027] The cross-section of the bearing seat 19 is a right trapezoid. The guide plate 22 is fixedly installed on the side of the mounting seat 2. After the first-stage hydraulic mechanism 6 moves, the upper surface of the bearing seat 19 is located directly below the pressing seat 21. After the first-stage hydraulic mechanism 6 returns and the second-stage hydraulic mechanism 7 moves, the pressed workpiece falls on the inclined surface of the bearing seat 19 and slides down the inclined surface of the bearing seat 19 onto the guide plate 22. It then flows along the guide plate 22 to the unloading mechanism, which facilitates the unloading of the pressed workpiece.

[0028] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. An automated assembly equipment for automotive parts, characterized in that: include: The base (1) is fixedly mounted with a primary mounting bracket (18) and a secondary mounting bracket (20). Mounting base (2), which is fixed to the base (1) by support leg (8), and a first-stage rotating shaft (9), a second-stage rotating shaft (10) and a third-stage rotating shaft (11) are rotatably mounted on the mounting base (2). A primary feeding tray (3) is fixed on a primary rotating shaft (9), and a primary loading groove (12) is provided on the primary feeding tray (3). The primary loading groove (12) is used to load the first workpiece (28). A secondary feeding tray (4) is fixed on a secondary rotating shaft (10), and a secondary loading groove (13) is provided on the secondary feeding tray (4). The secondary loading groove (13) is used to load the second workpiece (29). The three-stage feeding tray (5) is fixed on the three-stage rotating shaft (11), and the three-stage feeding tray (5) is provided with a three-stage loading groove (14), which is used to load the third workpiece (30). A primary hydraulic mechanism (6) is fixedly installed on a primary mounting frame (18), and a bearing seat (19) is fixedly installed on the telescopic part of the primary hydraulic mechanism (6). A secondary hydraulic mechanism (7) is fixedly installed on a secondary mounting frame (20), and a press-fit seat (21) is fixedly installed on the telescopic part of the secondary hydraulic mechanism (7). A set of symmetrically arranged primary material troughs (12), secondary material troughs (13), and tertiary material troughs (14) are provided. When the primary material troughs (12), secondary material troughs (13), and tertiary material troughs (14) on the outer side of the primary material feeding plate (3), secondary material feeding plate (4), and tertiary material feeding plate (5) rotate to the corresponding feeding conveyor belt, the primary material troughs (12), secondary material troughs (13), and tertiary material troughs (14) on the inner side of the primary material feeding plate (3), secondary material feeding plate (4), and tertiary material feeding plate (5) are on the same axis. After the secondary hydraulic mechanism (7) moves, the pressing seat (21) applies downward pressure to the third workpiece (30) so that the first workpiece (28), the second workpiece (29), and the third workpiece (30) are pressed together. It also includes a support seat (19), the cross section of which is a right trapezoid. A guide plate (22) is fixedly installed on the side of the mounting seat (2). After the first-stage hydraulic mechanism (6) moves, the upper surface of the support seat (19) is located directly below the pressing seat (21). After the first-stage hydraulic mechanism (6) returns and the second-stage hydraulic mechanism (7) moves for the second time, the pressed workpiece falls on the inclined surface of the support seat (19) and slides down the inclined surface of the support seat (19) onto the guide plate (22), and flows along the guide plate (22) to the unloading mechanism.

2. The automatic assembly equipment for automotive parts according to claim 1, characterized in that: A primary feeding conveyor belt (15) is fixedly installed on the base (1) by a primary bracket. The primary feeding conveyor belt (15) is used to transport the first workpiece (28) to the primary loading trough (12). A secondary feeding conveyor belt (16) is fixedly installed on the base (1) by a secondary bracket. The secondary feeding conveyor belt (16) is used to transport the second workpiece (29) to the secondary loading trough (13). A tertiary feeding conveyor belt (17) is fixedly installed on the base (1) by a tertiary bracket. The tertiary feeding conveyor belt (17) is used to transport the third workpiece (30) to the tertiary loading trough (14).

3. The automatic assembly equipment for automotive parts according to claim 1, characterized in that: The dimensions of the first workpiece (28), the second workpiece (29), and the third workpiece (30) are respectively matched with the dimensions of the first-level material loading tank (12), the second-level material loading tank (13), and the third-level material loading tank (14). The diameters of the first-level material loading tank (12), the second-level material loading tank (13), and the third-level material loading tank (14) are set in a decreasing trend. The diameter of the pressing seat (21) is smaller than the diameter of the third-level material loading tank (14).

4. The automatic assembly equipment for automotive parts according to claim 1, characterized in that: A servo motor (23) is fixedly installed on the base (1). A transmission gear (24) is fixedly installed on the output shaft of the servo motor (23). A first-stage driven gear (25) is fixedly installed on the lower end of the first-stage rotating shaft (9). A second-stage driven gear (26) is fixedly installed on the lower end of the second-stage rotating shaft (10). A third-stage driven gear (27) is fixedly installed on the lower end of the third-stage rotating shaft (11). The first-stage driven gear (25), the second-stage driven gear (26), and the third-stage driven gear (27) are of the same type, and all three gears mesh with the transmission gear (24).

5. The automatic assembly equipment for automotive parts according to claim 1, characterized in that: The first-level material loading tank (12) has a first-level clearance groove (31) on its side wall. The first-level clearance groove (31) has an integrally formed first-level support (32) on its side wall. The first-level support (32) is L-shaped and is made of spring steel. When the first workpiece (28) is placed in the first-level material loading tank (12), the first workpiece (28) is placed on the first-level support (32).

6. The automatic assembly equipment for automotive parts according to claim 5, characterized in that: The secondary material loading tank (13) has a secondary clearance groove (33) on its side wall. The secondary clearance groove (33) has a secondary support (34) integrally formed on its side wall. The tertiary material loading tank (14) has a tertiary clearance groove (35) on its side wall. The tertiary clearance groove (35) has a tertiary support (36) integrally formed on its side wall. The shape and material of the secondary support (34) and the tertiary support (36) are the same as those of the primary support (32). When the second workpiece (29) and the third workpiece (30) are placed in the secondary clearance groove (33) and the tertiary clearance groove (35), the second workpiece (29) and the third workpiece (30) are respectively placed on the secondary support (34) and the tertiary support (36). The primary clearance groove (31), the secondary clearance groove (33) and the tertiary clearance groove (35) are all evenly arranged in six places around the material loading tank, and each clearance groove is provided with a support.

7. An automatic assembly equipment for automotive parts according to claim 6, characterized in that: When the first workpiece (28) is actually placed, the lower surface of the first workpiece (28) is higher than the lower surface of the first feeding tray (3), and the upper surface of the first workpiece (28) is lower than the upper surface of the first feeding tray (3). The lower surface of the second workpiece (29) is higher than the lower surface of the second feeding tray (4), and the upper surface of the second workpiece (29) is lower than the upper surface of the second feeding tray (4). The lower surface of the third workpiece (30) is higher than the lower surface of the third feeding tray (5), and the upper surface of the third workpiece (30) is lower than the upper surface of the third feeding tray (5).

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