Hook assembly of automobile exhaust pipe

Abstract

The utility model discloses an automobile exhaust pipe hook assembly which comprises an installation base, and a hook fixing mechanism is arranged below the installation base. The hook fixing mechanism comprises a hook body, and an opening is formed in one side of the hook body; a clamping arm is arranged on one side, close to the opening, of the hook body, and the upper end of the clamping arm is hinged to the opening through a rotating shaft; a ratchet pipe clamp is arranged on one side of the hook body, and the upper end of the ratchet pipe clamp is fixedly connected with the hook body. According to the utility model, through the movable connection design of the hook fixing mechanism and the mounting seat, the limitation of the traditional integrated hook design is overcome, and the universality and the flexibility of the assembly are improved; the clamping arm is hinged to the upper portion of the opening through the rotating shaft, the structure of the bent part and the positioning clamping head is matched, tight clamping of the exhaust pipe can be achieved, and looseness caused by vibration is effectively reduced; the flexible extrusion blocks on the inner sides of the clamping arms make direct contact with the exhaust pipe, rigid collision caused by vibration is effectively relieved, and noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile spare parts, in particular to an automobile exhaust pipe hook assembly. Background Technique

[0002] As an indispensable part of the automobile exhaust system, the exhaust pipe hook of the automobile undertakes the important mission of firmly connecting the exhaust system to the vehicle body floor. In the current market, the automobile exhaust system assembly is generally connected to the vehicle body floor through the exhaust pipe hook. However, this connection mechanism faces severe challenges when dealing with the complex dynamic loads generated by engine vibration and exhaust excitation. Specifically, strong vibrations are not only directly transmitted to the vehicle body floor through the hook, causing unnecessary vehicle body vibrations, but also potentially threatening the stability of the exhaust system.

[0003] To alleviate this problem, in traditional designs, a combination of rubber hangers and exhaust pipe hooks is often adopted. That is, one end of the hook is firmly welded to the vehicle body floor, and the other end is cleverly connected to the exhaust system assembly by utilizing the elastic characteristics of the rubber hanger in order to achieve a certain degree of vibration isolation. However, although such designs have their unique features, their limitations are gradually emerging in the face of diverse usage scenarios and continuously improving performance requirements. On the one hand, the integrated hook design restricts its flexible application in different vehicle models and exhaust system configurations; on the other hand, in the face of high-intensity vibration shocks, hard collisions are likely to occur between the rigid-structured hook and the exhaust pipe, exacerbating wear and noise problems, and at the same time lacking effective clamping and fixing of the exhaust pipe, making it difficult to meet the increasingly strict vehicle usage requirements. Summary of the Invention

[0004] The purpose of the utility model is to provide an automobile exhaust pipe hook assembly to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An automobile exhaust pipe hook assembly includes a mounting seat. A hook fixing mechanism is provided below the mounting seat, and the hook fixing mechanism is movably connected to the mounting seat; the hook fixing mechanism includes a hook body. An opening is provided on one side of the hook body, and an exhaust pipe is arranged inside the opening; a clamping arm is provided on the hook body near the opening. The upper end of the clamping arm is hinged above the opening through a rotating shaft; a bending portion is provided at the lower end of the clamping arm, and the bending portion extends towards the bottom of the hook body and is fixedly connected thereto; a ratchet hose clamp is provided on one side of the hook body, and the upper end of the ratchet hose clamp is fixedly connected to the hook body.

[0007] Preferably, a positioning chuck is provided at the top of the bending portion, and a positioning groove adapted to the positioning chuck is opened at the bottom of the hook body.

[0008] Preferably, a flexible extrusion block is provided inside the clamping arm, and the flexible extrusion block abuts against the exhaust pipe.

[0009] Preferably, a pressing plate is provided above the inner wall of the open end, and the pressing plate abuts against the exhaust pipe.

[0010] Preferably, a plurality of buffer springs are arranged side by side on one side of the pressing plate close to the inner wall of the open end, one end of the buffer spring is fixedly connected to the pressing plate, and the other end of the buffer spring is fixedly connected to the inner wall of the open end.

[0011] Preferably, the ratchet pipe clamp includes a fixed seat, and the fixed seat is fixedly connected to the side of the hook body through a bolt; a movable ring is provided below the fixed seat, and one end of the movable ring is hinged to the fixed seat; ratchet teeth are provided on the outer side of the other end of the movable ring, and a receiving cavity is provided above the fixed seat; the end of the movable ring provided with ratchet teeth is arranged in the receiving cavity, and a movable wrench is provided in the receiving cavity; the movable wrench is movably connected to the fixed seat, one end of the movable wrench extends out of the receiving cavity, and a claw adapted to the ratchet teeth is provided at the other end of the movable wrench.

[0012] Preferably, a spring shock absorber is fixedly installed at the upper end of the hook body, and an avoidance groove adapted to the spring shock absorber is provided at the lower end of the mounting seat; a fixed screw is provided in the spring shock absorber, and the top end of the fixed screw is fixedly connected to the inner wall of the avoidance groove.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model can flexibly adapt to the installation requirements of different vehicle models and exhaust systems through the movable connection design of the hook fixing mechanism and the mounting seat, overcomes the limitations of the traditional integrated hook design, and improves the versatility and flexibility of the component; the clamping arm is hinged to the upper part of the opening through the rotating shaft, and the structure of the bending part and the positioning clamp head can achieve tight clamping of the exhaust pipe and effectively reduce loosening caused by vibration; the ratchet pipe clamp provides a reliable locking force through the interaction between the movable wrench and the ratchet teeth, further enhances the fixing stability of the exhaust pipe, and prevents it from falling off or loosening due to vibration; the spring damper at the upper end of the hook body effectively absorbs the vibration energy from the exhaust pipe , reducing the transmission of vibration to the bottom plate of the vehicle body, improving the ride comfort and structural durability of the whole vehicle; the flexible extrusion block on the inner side of the clamping arm is in direct contact with the exhaust pipe, effectively alleviating the rigid collision caused by vibration and reducing noise generation; the clamping plate on the open inner wall cooperates with multiple buffer springs to provide additional support and buffering for the exhaust pipe, further reducing vibration impact and protecting the exhaust pipe and hook assembly from damage; the automobile exhaust pipe hook assembly of the utility model effectively solves the problems of insufficient vibration attenuation, poor fixing stability, rigid collision and noise mentioned in the background technology through a series of innovative designs, significantly improves the overall performance and reliability of the automobile exhaust system, and meets the pursuit of modern automobiles for high efficiency, stability and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the connection between the spring shock absorber and the hook body of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the hook body of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the pressing plate of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the ratchet pipe clamp of the utility model.

[0019] Among them: 1. Mounting seat; 2. Hook fixing mechanism; 201. Hook body; 202. Opening; 203. Clamping arm; 204. Bending portion; 3. Exhaust pipe; 4. Ratchet pipe clamp; 401. Fixed seat; 402. Active ring; 403. Ratchet; 404. Adjustable wrench; 5. Positioning clamp; 6. Positioning groove; 7. Flexible extrusion block; 8. Pressing plate; 9. Buffer spring; 10. Spring damper; 11. Avoidance groove; 12. Fixing screw. DETAILED DESCRIPTION

[0020] The following further describes the present utility model in detail with reference to the accompanying drawings.

[0021] Please refer to Figures 1 to 5 , to achieve the above object, the present utility model provides the following technical solutions:

[0022] An exhaust pipe hook assembly for an automobile, comprising a mounting base 1, wherein a hook fixing mechanism 2 is provided below the mounting base 1, and the hook fixing mechanism 2 is movably connected to the mounting base 1; the hook fixing mechanism 2 includes a hook body 201, wherein an opening 202 is provided on one side of the hook body 201, and an exhaust pipe 3 is arranged in the opening 202; a clamping arm 203 is provided on the hook body 201 near the opening 202, wherein the upper end of the clamping arm 203 is hinged to the upper part of the opening 202 through a rotating shaft; a bent portion 204 is provided at the lower end of the clamping arm 203, wherein the bent portion 204 extends towards the bottom of the hook body 201 and is fixedly connected thereto; a ratchet pipe clamp 4 is provided on one side of the hook body 201, wherein the upper end of the ratchet pipe clamp 4 is fixedly connected to the hook body 201.

[0023] The mounting base 1 serves as the foundation of the entire assembly. The mounting base 1 is fixed to the vehicle body floor of the automobile, providing a stable support for the hook fixing mechanism 2; the hook fixing mechanism 2 is movably connected to the mounting base 1, allowing a certain degree of flexible adjustment to adapt to the installation requirements of different vehicle models and exhaust systems; an opening 202 is provided on one side of the hook body 201 for accommodating and fixing the exhaust pipe 3, and this design facilitates the insertion and positioning of the exhaust pipe 3; a clamping arm 203 is provided on the side near the opening 202. The clamping arm 203 is hinged to the upper part of the opening 202 through a rotating shaft, enabling the clamping arm 203 to rotate around the rotating shaft, thereby realizing the clamping or loosening of the exhaust pipe 3; a bent portion 204 is provided at the lower end of the clamping arm 203. The bent portion 204 extends towards the bottom of the hook body 201 and is fixedly connected thereto. When the clamping arm 203 rotates to the clamping position, the bent portion 204 and the bottom of the hook body 201 form a stable support structure, enhancing the fixing effect on the exhaust pipe 3; the upper end of the ratchet pipe clamp 4 is fixedly connected to the hook body 201 to ensure its stability during operation. The ratchet pipe clamp 4 further locks the exhaust pipe 3 through structures such as internal ratchet teeth 403 and a movable wrench 404 therein. When the movable wrench 404 is rotated to a suitable position, the claws thereon interact with the ratchet teeth 403 to firmly lock the exhaust pipe 3 on the hook body 201; the exhaust pipe 3 hook assembly for an automobile effectively fixes the exhaust pipe 3 and attenuates vibration through a clever design and a reasonable working process, improving the overall performance and reliability of the automobile exhaust system.

[0024] Working process

[0025] Installation preparation: First, fix the mounting base 1 on the vehicle body floor. Then, insert the exhaust pipe 3 into the open end 202 of the hook body 201 and make a preliminary positioning.

[0026] Clamping operation: Rotate the clamping arm 203 so that it rotates downward around the rotating shaft until the contact surface inside the clamping arm 203 is in close contact with the exhaust pipe 3. At this time, the bent portion 204 and the bottom of the hook body 201 form a stable support structure to provide preliminary fixation for the exhaust pipe 3.

[0027] Locking operation: Use the ratchet hose clamp 4 to further lock the exhaust pipe 3. By pressing the movable wrench 404, the claws on it interact with the ratchet teeth 403 to firmly lock the exhaust pipe 3 on the hook body 201. This step ensures the stability and safety of the exhaust pipe 3 during driving.

[0028] Vibration attenuation: During driving, due to the influence of engine vibration and exhaust excitation, the exhaust pipe 3 will generate certain vibrations. At this time, the spring shock absorber 10 above the hook body 201 will absorb and attenuate these vibration energies, reduce the transmission of vibrations to the vehicle body floor, and improve ride comfort and structural durability.

[0029] Please refer to Figure 2 , Figure 3 , as an embodiment of the present utility model, a positioning chuck 5 is provided at the top of the bent portion 204, and a positioning groove 6 adapted to the positioning chuck 5 is provided at the bottom of the hook body 201.

[0030] In the above-described solution, after inserting the exhaust pipe 3 into the opening 202 of the hook body 201 and initially positioning it, the clamping arm 203 is operated to rotate around the rotating shaft and gradually approach the exhaust pipe 3; as the clamping arm 203 rotates, the bent portion 204 moves downward accordingly until the positioning chuck 5 at its top contacts the positioning groove 6 at the bottom of the hook body 201; when the positioning chuck 5 completely enters the positioning groove 6, the positioning chuck 5 will form a tight contact with the groove wall of the positioning groove 6, thereby preventing the clamping arm 203 from continuing to rotate or accidentally loosening; this positioning and locking mechanism ensures that the clamping arm 203 can maintain a predetermined position when clamping the exhaust pipe 3 and will not be easily changed due to vibration or other external factors; the combined use of the positioning chuck 5 and the positioning groove 6 not only enhances the connection strength between the clamping arm 203 and the hook body 201, but also improves the fixing stability of the entire hook assembly to the exhaust pipe 3. Even when encountering strong vibration or impact during vehicle driving, the positioning chuck 5 can effectively prevent the loosening or falling off of the clamping arm 203, thereby protecting the exhaust pipe 3 from damage; this design helps to extend the service life of the exhaust pipe 3, reduce noise and wear problems caused by vibration, and at the same time improve the driving quality and safety of the entire vehicle; in practical applications, this hook assembly can well adapt to various complex working conditions and road conditions, providing a strong guarantee for the normal operation of the vehicle exhaust system.

[0031] Please refer to Figure 3 , as an embodiment of the present utility model, a flexible extrusion block 7 is provided inside the clamping arm 203, and the flexible extrusion block 7 abuts against the exhaust pipe 3.

[0032] In the above-described solution, the flexible extrusion block 7 is usually made of rubber, silica gel or other elastic materials and has good buffering and shock-absorbing properties; when the clamping arm 203 clamps the exhaust pipe 3, the flexible extrusion block 7 can absorb and disperse the vibration energy from the exhaust pipe 3, reducing the transmission of vibration to the hook assembly and the vehicle body floor; this buffering effect helps to reduce noise and wear caused by vibration and protects the exhaust pipe 3 and the hook assembly from damage; the flexible extrusion block 7 can closely fit the surface of the exhaust pipe 3 to ensure good contact between the clamping arm 203 and the exhaust pipe 3. This close fit not only improves the fixing stability but also helps to prevent the exhaust pipe 3 from shaking or falling off during driving; at the same time, the material and shape of the flexible extrusion block 7 can be customized according to the material and shape of the exhaust pipe 3 to achieve better adaptability and sealing performance; due to the soft texture of the flexible extrusion block 7, it can avoid scratching or indentation on the surface of the exhaust pipe 3 during the clamping process. This protective effect helps to extend the service life of the exhaust pipe 3 and keep its appearance clean and beautiful.

[0033] Please refer to in combination Figure 1 、 Figure 2 and Figure 4, as an embodiment of the present utility model, a pressing plate 8 is provided above the inner wall of the open end 202, and the pressing plate 8 abuts against the exhaust pipe 3; a plurality of buffer springs 9 are arranged side by side on the side of the pressing plate 8 close to the inner wall of the open end 202, one end of the buffer spring 9 is fixedly connected to the pressing plate 8, and the other end of the buffer spring 9 is fixedly connected to the inner wall of the open end 202.

[0034] In the above solution, the pressing plate 8 is located above the inner wall of the open end 202. When the exhaust pipe 3 is inserted into the open end 202 and preliminarily positioned, the pressing plate 8 will abut against the top of the exhaust pipe 3; by applying a certain pressure to the exhaust pipe 3 through the pressing plate 8, it can ensure that the exhaust pipe 3 will not loosen or fall off due to vibration during driving; the design of the pressing plate 8 usually takes into account the shape and size of the exhaust pipe 3 to ensure that it can closely fit the exhaust pipe 3 and provide a stable fixing effect; a plurality of buffer springs 9 are arranged side by side on the side of the pressing plate 8 close to the inner wall of the open end 202, one end is fixedly connected to the pressing plate 8, and the other end is fixedly connected to the inner wall of the open end 202; when the exhaust pipe 3 is vibrated during vehicle driving, these buffer springs 9 can absorb and disperse the vibration energy, reduce the direct impact of the vibration on the pressing plate 8 and the exhaust pipe 3, and through the elastic deformation of the spring, convert the vibration into the potential energy of the spring, so as to effectively attenuate the vibration, reduce the impact generated by the pressing plate 8 on the exhaust pipe 3, protect the exhaust pipe 3 from damage, and improve the driving quality and safety of the whole vehicle.

[0035] Please refer to Figure 1 , Figure 5 , as an embodiment of the present utility model, the ratchet pipe clamp 4 includes a fixed seat 401, and the fixed seat 401 is fixedly connected to the side of the hook body 201 through a bolt; a movable ring 402 is provided below the fixed seat 401, and one end of the movable ring 402 is hinged to the fixed seat 401; ratchet teeth 403 are provided on the outer side of the other end of the movable ring 402, and a receiving cavity (not shown in the figure) is opened above the fixed seat 401; one end of the movable ring 402 provided with ratchet teeth 403 is arranged in the receiving cavity, and a movable wrench 404 is arranged in the receiving cavity; the movable wrench 404 is movably connected to the fixed seat 401, one end of the movable wrench 404 extends out of the receiving cavity, and a claw adapted to the ratchet teeth 403 is provided at the other end of the movable wrench 404.

[0036] In the above-described solution, the fixed seat 401 is fixedly connected to the side of the hook body 201 by bolts to ensure that the ratchet hose clamp 4 can be stably installed on the hook body 201; a receiving cavity is provided above the fixed seat 401 for receiving the ratchet teeth 403 portion of the movable ring 402 and the movable wrench 404; the movable ring 402 is a movable component in the ratchet hose clamp 4, one end of which is connected to the fixed seat 401 in a hinged manner, allowing the movable ring 402 to rotate around the hinge point; on the outer side of the other end of the movable ring 402, there are provided ratchet teeth 403, which are used to interact with the claws on the movable wrench 404 to achieve the locking function; the ratchet teeth 403 are a key part on the movable ring 402, and the ratchet teeth 403 are arranged in a serrated shape and can tightly engage with the claws when subjected to pressure in a specific direction to prevent the movable ring 402 from rotating in the reverse direction; the movable wrench 404 is an operating component in the ratchet hose clamp 4, and the movable wrench 404 is movably connected to the fixed seat 401. One end of the movable wrench 404 extends out of the receiving cavity for easy operation by the user, and the other end of the movable wrench 404 is provided with claws adapted to the ratchet teeth 403 for engaging with or separating from the ratchet teeth 403.

[0037] Please refer to Figure 2 , as an embodiment of the present invention, a spring shock absorber 10 is fixedly installed at the upper end of the hook body 201, and an avoidance groove 11 adapted to the spring shock absorber 10 is provided at the lower end of the mounting seat 1; a fixed screw 12 is provided inside the spring shock absorber 10, and the top end of the fixed screw 12 is fixedly connected to the inner wall of the avoidance groove 11.

[0038] In the above-described solution, the spring shock absorber 10 can effectively absorb and disperse the vibration energy from the exhaust pipe 3 through its internal spring structure. When the exhaust pipe 3 vibrates due to engine operation or other factors, the spring shock absorber 10 can convert these vibrations into the elastic potential energy of the spring, thereby reducing the transmission of vibrations to the hook body 201 and the vehicle body structure; by slowing down the vibration transmission, the spring shock absorber 10 helps to maintain the stability of the hook body 201 and the exhaust pipe 3 during driving. Even when encountering bumpy or uneven roads, it can reduce the swaying and noise caused by vibrations and improve the riding experience; the mounting seat 1 is a connecting component between the spring shock absorber 10 and the hook body 201, and it is responsible for carrying and fixing the spring shock absorber 10. The design of the mounting seat 1 needs to ensure that the spring shock absorber 10 can be firmly installed on the hook body 201 and is not easily loosened or detached during operation; the avoidance groove 11 opened at the lower end of the mounting seat 1 is designed to meet the installation requirements of the spring shock absorber 10. The shape and size of the avoidance groove 11 match the outer shape of the spring shock absorber 10 to ensure that the spring shock absorber 10 can be smoothly installed and fixed on the mounting seat 1; at the same time, the avoidance groove 11 also allows the spring shock absorber 10 to have a certain amount of movement space when subjected to vibrations, further improving the shock absorption effect; the fixing screw 12 is a key component connecting the spring shock absorber 10 and the bottom of the inner wall of the avoidance groove 11. Its top end is fixedly connected to the bottom of the inner wall of the avoidance groove 11 to ensure the firmness of the connection through thread tightening or other means; this fixed connection not only ensures the stability of the spring shock absorber 10 on the mounting seat 1 but also prevents loosening or detachment caused by vibrations; the design of the fixing screw 12 also takes into account the improvement of the shock absorption effect. By adjusting the length and tightening degree of the fixing screw 12, the pre-tightening force and stiffness of the spring shock absorber 10 can be changed, thereby optimizing the shock absorption effect; a tighter pre-tightening force can provide better shock absorption performance but may also increase the stiffness of the system; while a looser pre-tightening force may reduce the shock absorption effect but improve the compliance of the system; through the combined action of the spring shock absorber 10 fixedly installed at the upper end of the hook body 201 through its internal spring structure, the design of the avoidance groove 11 at the lower end of the mounting seat 1, and the fixing screw 12 fixedly connected to the bottom of the inner wall of the avoidance groove 11, the effective absorption and dispersion of the vibrations of the exhaust pipe 3 are achieved. This design not only improves the stability and reliability of the hook assembly but also enhances the driving quality and comfort of the whole vehicle.

[0039] Although the specific implementation manners of the present invention have been described above, those skilled in the art should understand that these are only examples. The protection scope of the present invention is defined by the appended claims. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An exhaust pipe hook assembly for an automobile, comprising a mounting seat (1), wherein a hook fixing mechanism (2) is arranged below the mounting seat (1), and the hook fixing mechanism (2) is movably connected to the mounting seat (1); characterized in that, The hook fixing mechanism (2) includes a hook body (201). One side of the hook body (201) is provided with an opening (202), and an exhaust pipe (3) is arranged in the opening (202). A clamping arm (203) is provided on one side of the hook body (201) close to the opening (202). The upper end of the clamping arm (203) is hinged above the opening (202) through a rotating shaft. A bent portion (204) is provided at the lower end of the clamping arm (203), and the bent portion (204) extends towards the bottom of the hook body (201) and is fixedly connected thereto. A ratchet hose clamp (4) is provided on one side of the hook body (201), and the upper end of the ratchet hose clamp (4) is fixedly connected to the hook body (201).

2. The automotive exhaust pipe hook assembly according to claim 1, characterized in that, A positioning chuck (5) is provided at the top end of the bent portion (204), and a positioning groove (6) adapted to the positioning chuck (5) is formed at the bottom of the hook body (201).

3. The automotive exhaust pipe hook assembly according to claim 1, wherein A flexible extrusion block (7) is provided on the inner side of the clamping arm (203), and the flexible extrusion block (7) abuts against the exhaust pipe (3).

4. The automotive exhaust pipe hook assembly according to claim 1, characterized in that, A pressing plate (8) is provided above the inner wall of the opening (202), and the pressing plate (8) abuts against the exhaust pipe (3).

5. The automotive exhaust pipe hook assembly according to claim 4, characterized in that, A plurality of buffer springs (9) are arranged side by side on one side of the pressing plate (8) close to the inner wall of the opening (202). One end of the buffer spring (9) is fixedly connected to the pressing plate (8), and the other end of the buffer spring (9) is fixedly connected to the inner wall of the opening (202).

6. The automotive exhaust pipe hook assembly according to claim 1, wherein The ratchet hose clamp (4) includes a fixed seat (401), and the fixed seat (401) is fixedly connected to the side of the hook body (201) through a bolt. A movable ring (402) is provided below the fixed seat (401), and one end of the movable ring (402) is hinged to the fixed seat (401). Ratchet teeth (403) are provided on the outer side of the other end of the movable ring (402), and a receiving cavity is formed above the fixed seat (401). One end of the movable ring (402) provided with the ratchet teeth (403) is arranged in the receiving cavity, and a movable wrench (404) is arranged in the receiving cavity. The movable wrench (404) is movably connected to the fixed seat (401). One end of the movable wrench (404) extends out of the receiving cavity, and a claw adapted to the ratchet teeth (403) is provided at the other end of the movable wrench (404).

7. The exhaust pipe hook assembly of an automobile according to claim 1, wherein, A spring shock absorber (10) is fixedly installed at the upper end of the hook body (201), and an avoidance groove (11) adapted to the spring shock absorber (10) is formed at the lower end of the mounting seat (1). A fixed screw (12) is arranged in the spring shock absorber (10), and the top end of the fixed screw (12) is fixedly connected to the inner wall of the avoidance groove (11).

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