Protective structure of automatic parking sensor of new energy automobile

Abstract

The invention discloses a protection structure of an automatic parking sensor of a new energy automobile. The protection structure comprises a tire body, a rotor base fixedly mounted in the tire body, a sealing cover fixedly mounted at one end of the rotor base, and a mounting box mounted at one end of the sealing cover. A stator rack is installed in the rotor base, a rotor rotatably installed in the rotor base is arranged on the outer circle of the stator rack, a stator iron core is welded and installed on the outer circle of the stator rack, and a stator winding is installed on the stator iron core. A main shaft penetrating through the stator rack is fixedly installed at the center position of the rotor, and the end of the main shaft is connected with a wheel encoder installed in the installation box. According to the invention, the influence of vibration force on the wheel encoder is avoided, and a certain protection effect on the wheel encoder is achieved; and a certain physical protection effect and a certain waterproof effect are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sensors, and in particular relates to a protective structure of an automatic parking sensor for a new energy vehicle. Background Art

[0002] Automatic parking sensors include ultrasonic sensors, cameras, lidar, inertial measurement units (IMUs), and wheel encoders. Ultrasonic sensors are one of the most common sensors. They are installed on the front, rear, and sides of the vehicle to measure the distance between the vehicle and obstacles. By calculating the echo time to calculate the distance, ultrasonic sensors can help vehicles detect parking spaces and obstacles and issue warning sounds or parking signals. Cameras are used to capture images around the vehicle and analyze and identify parking spaces and obstacles through image processing algorithms. Vehicles can use this information to determine when to turn, accelerate, and brake. Cameras are usually installed on the front, rear, and sides of the vehicle. Lidar uses laser beams to scan the vehicle's surroundings to obtain more accurate distance and depth information. Lidar can help vehicles identify the shape and location of obstacles and generate accurate maps to achieve more accurate parking actions. Inertial measurement unit IMU is a combination of sensors that can measure the acceleration and angle changes of the vehicle. By monitoring the vehicle's movement and posture, IMU can provide accurate position and direction information of the vehicle, thereby helping the vehicle to accurately reverse and merge. Wheel encoders, installed on the wheels, are used to measure the distance and speed of the vehicle. By monitoring the rotation of the wheels, the encoder can help the vehicle calculate the travel distance and provide updated position information to achieve precise parking and lane change control. In summary, the automatic parking system usually uses ultrasonic sensors, cameras, lidar, inertial measurement unit IMU and wheel encoders to obtain the surrounding environment and dynamic information of the vehicle, and based on this information, it can realize automatic control of parking actions.

[0003] The invention patent with domestic application number 202310326401.5 discloses an anti-collision automatic parking radar device, including a radar detection device, a controller and a connecting wire. The radar detection device is evenly arranged on one side of the controller, and the connecting wire is fixedly connected between the radar detection device and the controller. The radar detection device includes a wiring tube, a first limit fixture, an adjustment control device and a second limit fixture. The first limit fixture is arranged at the end of the adjustment control device, and the second limit fixture is arranged at the front end of the adjustment control device. The wiring tube is arranged inside the first limit fixture. During the use of the present invention, the use position and angle of the probe sensor can be controlled, and the probe sensor can be automatically protected. The above invention achieves a protective effect by increasing the control and adjustment effect of the automatic parking radar body. Parking sensors are divided into many types, among which the wheel encoder is installed on the wheel, and when the wheel is rotating, there is a certain longitudinal vibration force between it and the ground during the normal driving of the car, which can easily cause the shaking of the wheel encoder or the instability of the connection end with the output shaft, thereby reducing the accuracy of the wheel encoder and affecting its normal use. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a protective structure for an automatic parking sensor for a new energy vehicle, comprising a tire body, a rotor base fixedly mounted inside the tire body, a cover fixedly mounted at one end of the rotor base, and an installation box mounted at one end of the cover. A stator frame is mounted inside the rotor base, a rotor rotatably mounted inside the rotor base is arranged on the outer circle of the stator frame, a stator core is welded and mounted on the outer circle of the stator frame, and a stator winding is mounted on the stator core, a main shaft penetrating the stator frame is fixedly mounted at the center of the rotor, and the end of the main shaft is connected and mounted to a wheel encoder mounted inside the installation box.

[0005] By passing electricity through the rotor base, the electromagnetic field generated by the stator core and stator winding causes the rotor to rotate, thereby rotating the main shaft connected to the rotor, and then the code disk inside the wheel encoder is connected and rotated. As the object being measured rotates, the light of the code disk will change from bright to dark. The photosensitive element at the receiving end will detect this change and convert it into an electrical signal output, thereby measuring the vehicle's speed, position, direction, etc., and cooperating with other sensors to achieve automatic parking effects.

[0006] As a further preferred technical solution of the present invention, the other end of the rotor base is connected to the tire body through a hub frame, and an end frame is installed on one side of the hub frame, and a pressure-resistant layer is installed between the outer circle of the rotor base and the tire body.

[0007] By setting the pressure-resistant layer, the outer ring of the rotor base and the inner ring of the tire body are protected and buffered, and the tightness between the tire body and the rotor base is increased.

[0008] As a further preferred technical solution of the present invention, the connection between the rotor base and the cover is provided with a mounting hole, and the rotor base and the cover are fixedly mounted inside the mounting hole by fixing bolts extending therefrom. A welding plate is welded and mounted on the cover at the top of the mounting box, and a shock absorbing spring is fixedly mounted on the top of the welding plate.

[0009] The top of the shock-absorbing spring is connected to the chassis of the new energy vehicle. During the driving of the new energy vehicle, the tire body will be subjected to force and vibration will be generated, and the shock-absorbing spring will buffer the vibration.

[0010] As a further preferred technical solution of the present invention; the inner ring of the stator frame is equipped with a drive and control unit, one end of the main shaft is connected and installed with the inner wall of the rotor base through a disc, the outside of the main shaft is fixedly installed with a bearing seat fixedly installed with the inner wall of the rotor base, the end of the bearing seat is installed with a connecting frame, and the other end of the main shaft passes through the connecting frame to install a connecting shaft, and one end of the connecting shaft passes through the cover to install a connecting block. A truncated cone shaft is installed at one end of the installation box, and the connecting block is connected and installed with the truncated cone shaft.

[0011] The connecting block installed through one end of the connecting shaft passes through the sealing cover to drive the truncated cone shaft to rotate.

[0012] As a further preferred technical solution of the present invention; a fixed shaft is installed at one end of the conical shaft, and a connecting bearing is connected and installed at one end of the fixed shaft, the other end of the connecting bearing is connected and installed with the wheel encoder, and a protective frame fixedly installed with the cover is installed on the outside of the conical shaft, and the top and bottom of the protective frame are fixedly installed with the inner wall of the mounting box through a fixing block and a connecting spring.

[0013] During the driving process of the vehicle, its wheel body will produce certain vibrations according to changes in terrain or the speed of the vehicle itself, and the shock-absorbing spring will buffer the vibration force. At this time, the wheel encoder connected to the conical shaft needs to be in a stable connection state, and the vibration of the wheel body will cause the main shaft and the conical shaft to shake. At this time, the wheel encoder will shake with the shaking of the conical shaft, which may easily affect the code disk connected inside it and the detected rotation amount, thereby affecting the accuracy of the wheel encoder. Under the condition of ensuring the stability of the conical shaft, the vibration between the wheel body and the mounting box is buffered by connecting the spring, thereby avoiding the influence of the vibration force on the wheel encoder, and having a certain protective effect on the wheel encoder.

[0014] As a further preferred technical solution of the present invention, a protective box is provided on the outside of the wheel encoder and fixedly mounted on the end of the wheel encoder. The protective box is connected and mounted to the inner wall of the mounting box via a sliding block and a sliding rail. A mounting portion is integrally mounted on one side of the protective box, a connecting portion is integrally mounted on one side of the protective frame, an auxiliary portion and an extension portion are connected and mounted on one side of the connecting portion, and the mounting portion and the auxiliary portion are fixedly mounted via a clamping layer.

[0015] The protection box is connected to the inner wall of the installation box by sliding blocks and slide rails. When the protection frame is vibrated, they slide together to ensure the normal use of the wheel encoder and avoid vibration between the internal code disk of the wheel encoder and the connecting bearing, which affects the sensing effect of the wheel encoder.

[0016] As a further preferred technical solution of the present invention, a V-shaped portion is extended and installed on the top of the connecting portion, and a plurality of drainage grooves are arranged around the outside of the installation portion.

[0017] The physical protection of the wheel encoder is achieved by the installation box and the protection box, and the heat dissipation port achieves the heat dissipation effect of the wheel encoder. During use, the protection frame and the protection box are in a closed state. When water enters the installation box, the drainage groove drains the water near the connection between the protection frame and the protection box. The V-shaped part has a certain physical protection effect and a certain splash-proof effect.

[0018] As a further preferred technical solution of the present invention; a plurality of anti-collision blocks are fixedly installed around the outside of the protection box, and a drainage hole is opened on the installation box at the bottom of the drainage groove, and a heat dissipation port is opened at the bottom of the other side of the installation box.

[0019] The water discharged from the drainage groove is discharged in conjunction with the drainage hole. The wheel body itself has a certain vibration, and when the vibration force enters the installation box, it is beneficial to drain or waterproof the inside of the installation box, thereby ensuring the waterproof effect of the sensor.

[0020] Beneficial Effects

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. During the driving process of the vehicle, its wheel body will produce certain vibrations according to changes in terrain or the speed of the vehicle itself, and the shock-absorbing spring will buffer the vibration force. At this time, the wheel encoder connected to the conical shaft needs to be in a stable connection state. The vibration of the wheel body will cause the main shaft and the conical shaft to shake. At this time, the wheel encoder will shake with the shaking of the conical shaft, which is easy to affect the code disk connected inside it, affecting the detected rotation amount, and thus affecting the accuracy of the wheel encoder. Under the condition of ensuring the stability of the conical shaft, the vibration between the wheel body and the mounting box is buffered by connecting the spring, thereby avoiding the influence of the vibration force on the wheel encoder and having a certain protective effect on the wheel encoder.

[0023] 2. The protection box and the inner wall of the installation box are connected and installed through sliding blocks and sliding rails. When the protection frame is vibrated, they slide together to ensure the normal use of the wheel encoder and avoid vibration between the internal code disk of the wheel encoder and the connecting bearing, which will affect the sensing effect of the wheel encoder.

[0024] 3. For the physical protection of the wheel encoder, the installation box and the protection box are used to achieve the protection effect, and the heat dissipation port achieves the heat dissipation effect of the wheel encoder. During use, the protection frame and the protection box are in a closed state. When water enters the installation box, the drainage groove will drain the water near the connection between the protection frame and the protection box. The V-shaped part has a certain physical protection effect and a certain splash-proof effect. The water discharged from the drainage groove is discharged in conjunction with the drainage hole. The wheel body itself has a certain vibration, and when water enters the installation box, the vibration force is conducive to drainage or waterproofing inside the installation box, thereby ensuring the waterproof effect of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the rotor frame of the present invention;

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure of the bearing seat of the present invention;

[0029] Figure 5 It is a schematic diagram of the cross-sectional structure of the installation box of the present invention;

[0030] Figure 6 for Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0031] Figure 7 It is a schematic diagram of the sliding structure of the installation box of the present invention.

[0032] In the figure: 1, tire body; 11, end frame; 12, hub frame; 2, rotor frame; 21, cover; 22, fixing bolts; 23, pressure-resistant layer; 24, welding plate; 25, shock-absorbing spring; 26, mounting hole; 3, stator frame; 31, stator core; 32, stator winding; 33, drive and control unit; 34, main shaft; 35, connecting shaft; 36, rotor; 4, bearing seat; 41, connecting frame; 5, round table shaft; 5 1. Protective frame; 52. Fixed block; 53. Connecting spring; 54. Fixed shaft; 55. Connecting part; 56. Auxiliary part; 57. Extending part; 58. V-shaped part; 59. Connecting block; 6. Mounting box; 61. Drain hole; 62. Slide rail; 63. Heat dissipation port; 7. Connecting bearing; 8. Wheel encoder; 81. Protective box; 82. Anti-collision block; 83. Sliding block; 84. Mounting part; 85. Drainage groove; 86. Clamping layer. DETAILED DESCRIPTION

[0033] This specific implementation is a protective structure for an automatic parking sensor of a new energy vehicle.

[0034] The above invention achieves the protective effect by increasing the control and adjustment effect of the automatic parking radar body. Parking sensors are divided into many categories, among which the wheel encoder is installed on the wheel. When the wheel is rotating, there is a certain longitudinal vibration force between it and the ground during the normal driving of the car, which can easily cause the wheel encoder to shake or the instability of the connection end with the output shaft, thereby reducing the accuracy of the wheel encoder and affecting its normal use.

[0035] Its structural diagram is as follows Figure 1-Figure 2 As shown. A protective structure of an automatic parking sensor for a new energy vehicle comprises a tire body 1, a rotor base 2 fixedly mounted inside the tire body 1, a cover 21 fixedly mounted at one end of the rotor base 2, and an installation box 6 mounted at one end of the cover 21. The other end of the rotor base 2 is connected and installed with the tire body 1 through a hub frame 12, and an end frame 11 is installed on one side of the hub frame 12, and a pressure-resistant layer 23 is installed between the outer circle of the rotor base 2 and the tire body 1. By setting the pressure-resistant layer 23, the outer circle of the rotor base 2 and the inner circle of the tire body 1 are protected and buffered, and the tightness between the tire body 1 and the rotor base 2 is increased. The connection between the rotor base 2 and the cover 21 is provided with a mounting hole 26, and the rotor base 2 and the cover 21 are fixedly installed by a fixing bolt 22 extending to the inside of the mounting hole 26. A welding plate 24 is welded and installed on the cover 21 at the top of the installation box 6, and a shock-absorbing spring 25 is fixedly installed on the top of the welding plate 24. The top of the shock-absorbing spring 25 is connected to the chassis of the new energy vehicle. When the new energy vehicle is running, the tire body 1 will vibrate when subjected to force, and the shock-absorbing spring 25 will buffer the vibration.

[0036] Its structural diagram is as follows Figure 3-Figure 5 As shown. A stator frame 3 is installed inside the rotor base 2, and a rotor 36 is rotatably installed inside the rotor base 2 on the outer circle of the stator frame 3. A stator core 31 is welded and installed on the outer circle of the stator frame 3, and a stator winding 32 is installed on the stator core 31. A main shaft 34 that penetrates the stator frame 3 is fixedly installed at the center of the rotor 36. And the end of the main shaft 34 is connected and installed with the wheel encoder 8 installed inside the installation box 6. A driving and control unit 33 is installed on the inner circle of the stator frame 3, and one end of the main shaft 34 is connected and installed with the inner wall of the rotor base 2 through a disc. A bearing seat 4 that is fixedly installed with the inner wall of the rotor base 2 is fixedly installed on the outer side of the main shaft 34, and a connecting frame 41 is installed on the end of the bearing seat 4, and a connecting shaft 35 is installed on the other end of the main shaft 34 through the connecting frame 41, and a connecting block 59 is installed on one end of the connecting shaft 35 through the cover 21. A truncated cone shaft 5 is installed at one end inside the installation box 6, and the connecting block 59 is connected and installed with the truncated cone shaft 5. The connecting block 59 installed through one end of the connecting shaft 35 passing through the cover 21 drives the truncated cone shaft 5 to rotate.

[0037] A fixed shaft 54 ​​is installed at one end of the conical shaft 5, and a connecting bearing 7 is installed at one end of the fixed shaft 54, and the other end of the connecting bearing 7 is connected and installed with the wheel encoder 8. A protective frame 51 fixedly installed with the cover 21 is installed on the outside of the conical shaft 5, and the top and bottom of the protective frame 51 are fixedly installed with the inner wall of the installation box 6 through a fixing block 52 and a connecting spring 53. During the driving process of the vehicle, its wheel body will produce certain vibrations according to the changes in terrain or the speed of the vehicle itself, and the shock-absorbing spring 25 will buffer the vibration force. At this time, the wheel encoder 8 connected to the truncated cone shaft 5 needs to be in a stable connection state. The vibration of the wheel body will cause the main shaft 34 and the truncated cone shaft 5 to shake, and the wheel encoder 8 will shake along with the shaking of the truncated cone shaft 5, which is easy to affect the code disk connected inside it, affecting the rotation amount detected by it, and thus affecting the accuracy of the wheel encoder 8. Under the condition of ensuring the stability of the truncated cone shaft 5, the vibration between the wheel body and the installation box 6 is buffered by connecting the spring 53, thereby avoiding the influence of the vibration force on the wheel encoder 8, and having a certain protective effect on the wheel encoder 8. The wheel encoder 8 is provided with a protective box 81 fixedly installed at the end of the wheel encoder 8 on the outside, and the protective box 81 is connected and installed with the inner wall of the installation box 6 through a sliding block 83 and a slide rail 62. A mounting portion 84 is integrally mounted on one side of the protection box 81, a connecting portion 55 is integrally mounted on one side of the protection frame 51, an auxiliary portion 56 and an extension portion 57 are connected and mounted on one side of the connecting portion 55, and the mounting portion 84 and the auxiliary portion 56 are fixedly mounted by a clamping layer 86. The protection box 81 is connected and mounted to the inner wall of the mounting box 6 by a sliding block 83 and a slide rail 62. When the protection frame 51 is vibrated, they slide together to ensure the normal use of the wheel encoder 8 and avoid vibration between the internal code disk of the wheel encoder 8 and the connection bearing 7, thereby affecting the sensing effect of the wheel encoder 8.

[0038] Its structural diagram is as follows Figure 6-Figure 7As shown. A V-shaped portion 58 is installed on the top of the connecting portion 55, a plurality of drainage grooves 85 are provided on the outside of the mounting portion 84, a plurality of anti-collision blocks 82 are fixedly installed on the outside of the protective box 81, and a drainage hole 61 is provided on the mounting box 6 at the bottom of the drainage groove 85, and a heat dissipation port 63 is provided at the bottom of the other side of the mounting box 6. For the physical protection of the wheel encoder 8, the mounting box 6 and the protective box 81 achieve a protective effect, and the heat dissipation port 63 achieves a heat dissipation effect on the wheel encoder 8. During use, the protective frame 51 and the protective box 81 are in a closed state. When water enters the mounting box 6, the drainage groove 85 drains the water near the connection between the protective frame 51 and the protective box 81, and the V-shaped portion 58 has a certain physical protection effect and a certain anti-splashing effect. The water discharged from the drainage groove 85 is discharged in conjunction with the drainage hole 61. The wheel body itself has a certain vibration, and when water enters the installation box 6, the vibration force is conducive to drainage or waterproofing of the installation box 6, thereby ensuring the waterproof effect of the sensor. By energizing the rotor base 2, the electromagnetic field generated by the stator core 31 and the stator winding 32 causes the rotor 36 to rotate, thereby rotating the main shaft 34 connected to the rotor 36, and then the code disk inside the wheel encoder 8 is connected and rotated. As the object being measured rotates, the light of the code disk will change from bright to dark, and the photosensitive element at the receiving end will detect this change and convert it into an electrical signal output, thereby measuring the vehicle speed, position and direction, etc., and cooperating with other sensors to achieve automatic parking effect.

[0039] During the use of the tire body 1, vibrations will be generated between the tire body 1, the vehicle frame and the ground according to the terrain conditions and the speed, and the direction of the vibration force is generally vertical. After the vibration occurs, the shock-absorbing spring 25 connected between the top of the welding plate 24 and the frame will have a certain shock-absorbing effect on the tire body 1. While ensuring the stable installation of the wheel encoder 8, when subjected to vertical vibration force, the connecting springs 53 installed above and below the protective frame 51 cooperate with the sliding block 83 and the slide rail 62 between the protective box 81 and the installation box 6 to perform a buffering effect, thereby ensuring the stability of the connection between the conical shaft 5 and the internal code disk of the wheel encoder 8.

[0040] All technical features in this embodiment can be freely combined according to actual needs.

[0041] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A protective structure for an automatic parking sensor of a new energy vehicle, characterized in that: The invention comprises a tire body (1), a rotor base (2) fixedly mounted inside the tire body (1), a cover (21) fixedly mounted at one end of the rotor base (2), and an installation box (6) mounted at one end of the cover (21). A stator frame (3) is mounted inside the rotor base (2), a rotor (36) rotatably mounted inside the rotor base (2) is arranged on the outer circle of the stator frame (3), a stator core (31) is welded and mounted on the outer circle of the stator frame (3), and a stator winding (32) is mounted on the stator core (31), a main shaft (34) penetrating the stator frame (3) is fixedly mounted at the center of the rotor (36), and the end of the main shaft (34) is connected and mounted to a wheel encoder (8) mounted inside the installation box (6).

2. The protective structure of the automatic parking sensor for new energy vehicles according to claim 1 is characterized in that: The other end of the rotor base (2) is connected and installed with the tire body (1) via a hub frame (12), and an end frame (11) is installed on one side of the hub frame (12). A pressure-resistant layer (23) is installed between the outer circle of the rotor base (2) and the tire body (1).

3. The protective structure of the automatic parking sensor for new energy vehicles according to claim 2 is characterized in that: The connection between the rotor base (2) and the cover (21) is provided with a mounting hole (26), and the rotor base (2) and the cover (21) are fixedly mounted inside the mounting hole (26) via fixing bolts (22). A welding plate (24) is welded and mounted on the top of the mounting box (6) on the cover (21), and a shock absorbing spring (25) is fixedly mounted on the top of the welding plate (24).

4. The protective structure of the automatic parking sensor for new energy vehicles according to claim 3 is characterized by: The inner ring of the stator frame (3) is equipped with a driving and control unit (33), one end of the main shaft (34) is connected to the inner wall of the rotor base (2) through a disc, the outside of the main shaft (34) is fixedly equipped with a bearing seat (4) fixedly equipped with the inner wall of the rotor base (2), the end of the bearing seat (4) is equipped with a connecting frame (41), and the other end of the main shaft (34) passes through the connecting frame (41) and is equipped with a connecting shaft (35), and one end of the connecting shaft (35) passes through the cover (21) and is equipped with a connecting block (59). A truncated cone shaft (5) is installed at one end of the installation box (6), and the connecting block (59) is connected and installed with the truncated cone shaft (5).

5. The protective structure of the automatic parking sensor for new energy vehicles according to claim 4 is characterized in that: A fixed shaft (54) is installed at one end of the truncated cone shaft (5), and a connecting bearing (7) is connected and installed at one end of the fixed shaft (54), and the other end of the connecting bearing (7) is connected and installed with the wheel encoder (8). A protective frame (51) fixedly installed with the cover (21) is installed outside the truncated cone shaft (5), and the top and bottom of the protective frame (51) are fixedly installed with the inner wall of the installation box (6) through a fixing block (52) and a connecting spring (53).

6. The protective structure of the automatic parking sensor for new energy vehicles according to claim 5 is characterized by: The wheel encoder (8) is provided with a protective box (81) fixedly mounted on the end of the wheel encoder (8), and the protective box (81) is connected and mounted to the inner wall of the mounting box (6) via a sliding block (83) and a sliding rail (62). A mounting portion (84) is integrally mounted on one side of the protective box (81), a connecting portion (55) is integrally mounted on one side of the protective frame (51), an auxiliary portion (56) and an extension portion (57) are connected and mounted on one side of the connecting portion (55), and the mounting portion (84) and the auxiliary portion (56) are fixedly mounted via a clamping layer (86).

7. The protective structure of the automatic parking sensor for new energy vehicles according to claim 6 is characterized by: A V-shaped portion (58) is extended and installed on the top of the connecting portion (55), and a plurality of drainage grooves (85) are arranged around the outside of the mounting portion (84).

8. The protective structure of the automatic parking sensor for new energy vehicles according to claim 7 is characterized in that: A plurality of anti-collision blocks (82) are fixedly mounted on the outside of the protection box (81), a drainage hole (61) is provided on the installation box (6) at the bottom of the drainage groove (85), and a heat dissipation port (63) is provided at the bottom of the other side of the installation box (6).

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