A trimming device for automobile part machining forming

Abstract

The application relates to the technical field of edge trimming devices, and particularly discloses an edge trimming device for automobile part machining and forming, which comprises a tooling table, the top of the tooling table is provided with symmetric sealing plates, the number of the sealing plates is two, and the two sealing plates form a cavity box-shaped structure; a driving motor can drive a reciprocating screw rod to rotate, and a moving frame can slide up and down in the rotating process, thereby realizing the adjustment of the position of a part trimming device; then, in the using process, a first motor is started, the first motor can drive a second recessed groove wheel to rotate under the action of a track, therefore, a circular ring can drive a connecting sliding ring to move up and down, thereby making a trapezoidal plate move up and down, so that a rotating rod can rotate, and thus a polishing belt can be suitable for parts of different sizes and with protruding structures.

Description

Technical Field

[0001] This invention relates to the field of trimming equipment technology, and in particular to a trimming device for processing and forming automotive parts. Background Technology

[0002] In the automobile manufacturing process, many automotive parts, such as injection molded parts and stamped parts, often have excess burrs, flash, or irregular parts on their edges after processing and forming. These defects not only affect the appearance quality of the parts, but may also lead to problems such as poor fit during assembly. Therefore, they need to be trimmed.

[0003] Currently, existing automotive parts trimming equipment has many shortcomings in practical applications. On the one hand, due to the wide variety of automotive parts and their significant differences in shape and size, existing trimming equipment is unable to flexibly adapt to the trimming needs of different parts. For some parts with complex shapes, it is difficult to guarantee the precision and quality of trimming, often requiring multiple adjustments to equipment parameters or manual assistance in trimming, resulting in low production efficiency.

[0004] On the other hand, the trimming process generates a large amount of debris and dust, which not only pollutes the working environment but may also enter the equipment and affect its normal operation.

[0005] In addition, most existing trimming equipment uses fixed trimming tools and working modes, and cannot automatically adjust the trimming process according to the material of the parts and trimming requirements, making it difficult to meet diverse production needs. Summary of the Invention

[0006] The purpose of this invention is to provide a trimming device for processing and forming automotive parts, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a trimming device for processing and forming automotive parts, comprising a tooling table, wherein two sealing plates are arranged symmetrically above the tooling table, and the two sealing plates form a box-shaped structure with an internal cavity.

[0008] The inner sidewall of the sealing plate is slidably provided with an edge trimming assembly, the edge trimming assembly includes a movable frame, and a trapezoidal plate is rotatably provided on the outer side and inside of the movable frame.

[0009] The lower outer side of the movable frame is rotatably mounted with symmetrical rotating rods. Each rotating rod has an adjusting wheel rotatably mounted on the upper part of its end near the movable frame. Each adjusting wheel is in contact with the outer side of the trapezoidal plate.

[0010] The other end of the rotating rod is equipped with grinding belts on both the upper and lower sides.

[0011] Preferably, the tooling table has two through slots symmetrically arranged from the upper end face to the lower end face, and symmetrical sliding rods are fixedly installed on the lower end face of the tooling table in a state parallel to the through slots.

[0012] Preferably, a movable rod is slidably mounted on the outer surface of the slide rod, and a sliding groove is provided on the left and right sides of both ends of the movable rod. The slide rod is slidably mounted inside the sliding groove, and an arc-shaped plate is fixedly mounted on the upper end of the movable rod.

[0013] Preferably, a hollow column is fixedly installed on the inner circumferential surface of the arc-shaped plate, and a spring is fixedly installed inside each hollow column. An arc-shaped clamping plate is fixedly installed at one end of each spring, and one end of the arc-shaped clamping plate is slidably installed inside the hollow column.

[0014] Preferably, a main motor is fixedly installed on the lower end face of the tooling table, an adjusting rod is fixedly installed on the output shaft of the main motor, and connecting rods are rotatably installed on the lower parts of both the front and rear ends of the adjusting rod. The ends of the two connecting rods away from the adjusting rod are rotatably installed at the lower center position of the moving rod.

[0015] Preferably, the upper end face of the arc-shaped plate is fixedly connected to the lower end of the adjacent sealing plate, and L-shaped connecting pipes are fixedly installed on both the front and rear sides of the sealing plate. A cavity box is fixedly installed at the upper end of the connecting pipe, and three water tanks are fixedly installed in a circular array on the outer side of the connecting pipe. A water supply pipe is fixedly installed at the upper end of each water tank. The upper end of the water supply pipe is fixedly connected to and passes through the upper end of the cavity box. A fan is fixedly installed at the center of the upper end of the cavity box.

[0016] Preferably, a vertical groove is formed on the inner sidewall of the sealing plate, and a drive motor of the trimming assembly is provided at the upper end of the sealing plate. A reciprocating screw is fixedly installed on the output shaft of the drive motor, and the reciprocating screw is located inside the groove.

[0017] Preferably, a movable frame (303) is slidably installed inside the groove (206). The movable frame (303) and the reciprocating screw (302) are rotatably connected by threads. A first motor (304) is fixedly installed at the upper end of the movable frame (303). A first grooved wheel (305) is fixedly installed on the output shaft of the first motor (304). A drive belt is rotatably installed on the circumferential surface of the first grooved wheel (305), and a second grooved wheel (306) is rotatably installed at the other end of the inner side of the drive belt. The second grooved wheel (306) is located above the movable frame (303).

[0018] Preferably, a lead screw (307) is rotatably mounted on the upper end of the movable frame (303) to the inside. The upper end of the lead screw (307) is threadedly connected to the second grooved wheel (306). A ring (308) is fixedly mounted on the lower end face of the lead screw (307). A second motor (317) is fixedly mounted on the lower end face of the movable frame (303). A convex shaft (318) is fixedly mounted on the output shaft of the second motor (317) and located inside the movable frame (303). A connecting slip ring (310) is slidably mounted on the outer circumferential surface of the convex shaft (318).

[0019] Preferably, a trapezoidal plate is fixedly installed at the lower end of the connecting slip ring, and a trimming motor is fixedly installed inside the end of the rotating rod away from the trapezoidal plate. A third grooved wheel is fixedly installed on the upper and lower output shafts of the trimming motor. A fourth grooved wheel is rotatably installed on the upper and lower sides of the outer end of the rotating rod. A grinding belt is rotatably installed on the circumference of the fourth grooved wheel and the third grooved wheel.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, a drive motor rotates a reciprocating screw, which in turn allows the moving frame to slide up and down, thereby adjusting the position of the trimming device for parts. During use, starting the first motor, under the action of the track, causes the second grooved wheel to rotate with the lead screw. This causes the ring to drive the connecting slip ring to move up and down, which in turn causes the trapezoidal plate to move up and down, thus allowing the rotating rod to rotate. This allows the grinding belt to be applied to parts of different sizes and with protruding structures.

[0022] 2. In the process of use, the fan can draw the dust generated during the trimming of the sealing plate into the connecting pipe. Then, with the help of the water tank, the dust inside the cavity box can be removed, thereby reducing the impact of dust on the construction environment.

[0023] 3. In this invention, the main motor enables the adjusting rod to rotate along the connecting rod. After the connecting rod rotates, the left and right moving rods can slide, thereby allowing the arc-shaped clamping plate inside the arc plate to clamp multiple parts. Then, under the action of the spring, it can be used for parts with protrusions and unevenness, increasing the versatility of this device. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0026] Figure 2 This is a structural diagram of the tooling table of the present invention;

[0027] Figure 3 This is a structural diagram of the arc-shaped plate of the present invention;

[0028] Figure 4 This is a structural diagram of the hollow column of the present invention;

[0029] Figure 5 This is a structural diagram of the sealing plate of the present invention;

[0030] Figure 6 This is a diagram of the internal structure of the present invention;

[0031] Figure 7 This is a structural diagram of the reciprocating screw of the present invention;

[0032] Figure 8 This is a structural diagram of the second grooved wheel and lead screw of the present invention;

[0033] Figure 9 This is a structural diagram of the convex shaft and trapezoidal plate of the present invention;

[0034] Figure 10 This is a schematic diagram of the rotating rod and grinding belt of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Tooling table; 101. Through slot; 102. Slide rod; 103. Main motor; 104. Adjusting rod; 105. Connecting rod; 106. Moving rod; 107. Slide groove; 108. Arc plate; 109. Hollow column; 110. Spring; 111. Arc clamping plate;

[0037] 2. Sealing plate; 201. Connecting pipe; 202. Water tank; 203. Water supply pipe; 204. Hollow box; 205. Fan; 206. Groove;

[0038] 3. Trimming assembly; 301. Drive motor; 302. Reciprocating screw; 303. Moving frame; 304. First motor; 305. First grooved wheel; 306. Second grooved wheel; 307. Lead screw; 308. Ring; 309. Trapezoidal plate; 310. Connecting slip ring; 311. Rotating rod; 312. Adjusting wheel; 313. Trimming motor; 314. Third grooved wheel; 315. Fourth grooved wheel; 316. Grinding belt; 317. Second motor; 318. Protruding shaft. Detailed Implementation

[0039] 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.

[0040] Please see Figures 1 to 10 The present invention provides a technical solution:

[0041] A trimming device for machining and forming automotive parts includes a tooling table 1. Two parallel through slots 101 are laterally formed from the upper to the lower end face of the tooling table 1. A convex sliding rod 102 is fixedly mounted on the lower end face of the tooling table 1, parallel to the through slots 101. Figure 2 As shown.

[0042] Then, symmetrical movable rods 106 are slidably installed on the outer surfaces of the front and rear slide rods 102. The movable rods 106 have a U-shaped structure, and both ends are located inside the through grooves 101. Through grooves 107 are provided on the left and right sides of the front and rear edges of the movable rods 106. The grooves 107 and slide rods 102 are structurally matched, and the slide rods 102 and grooves 107 slide together, such as... Figure 3 As shown.

[0043] Then, an arc-shaped plate 108 is fixedly installed on the top of the moving rod 106. Furthermore, a main motor 103 is fixedly installed at the center of the lower end face of the tooling table 1. An adjusting rod 104 is fixedly installed on the output shaft of the main motor 103. Connecting rods 105 are rotatably installed at the lower parts of both ends of the adjusting rod 104. The ends of the two connecting rods 105 furthest from the adjusting rod 104 are rotatably installed at the lower middle of the moving rod 106. Figure 2 As shown.

[0044] During use, the main motor 103 is started, and the output shaft of the main motor 103 drives the adjusting rod 104 to rotate. The rotation of the adjusting rod 104 drives the connecting rod 105 to rotate. When the connecting rod 105 rotates, it will drive the moving rod 106 to slide along the path of the sliding rod 102 through the slide groove 107, so that the moving rod 106 and the arc plate 108 can be combined into a ring structure.

[0045] Hollow columns 109 are fixedly installed on the inner circumferential surfaces of the two left and right arc plates 108. Springs 110 are fixedly installed inside the hollow columns 109. Arc-shaped clamping plates 111 are fixedly installed on one side of the springs 110. One side of the arc-shaped clamping plates 111 is slidably installed inside the hollow columns 109.

[0046] The spring 110 allows the arc-shaped clamping plate 111 to clamp the lower end of the inner automotive parts, ensuring that there is no tilting during the trimming process.

[0047] Each of the curved plates 108 has a sealing plate 2 fixedly installed on its top. The two sealing plates 2 on the left and right sides can be combined to form a sealed cuboid structure to ensure that there is no interference during the trimming process. Figure 1 As shown.

[0048] Then, L-shaped connecting pipes 201 are fixedly installed on both the front and rear sides of the sealing plate 2. A cavity box 204 is fixedly installed at the upper end of the connecting pipe 201, and a fan 205 is fixedly installed at the upper end of the cavity box 204. Then, three water tanks 202 are fixedly installed on the outer circumferential surface of the connecting pipe 201. A water pump is fixedly installed on the lower inner surface of each water tank 202, and a water delivery pipe 203 is fixedly installed on the upper end of each water pump. The top of the water delivery pipe 203 passes through the upper surface of the water tank 202 and the cavity box 204 and is fixedly connected and in a through state.

[0049] During use, after the fan 205 is started, it can draw air into the cavity box 204 through the connecting pipe 201. At this time, the water pump is started, and the water pump delivers the water source inside the water tank 202 to the cavity box 204. When the water source is delivered to the cavity box 204, it becomes a mist, which removes dust and then discharges it through the fan 205.

[0050] Vertical grooves 206 are formed on the inner sidewalls of both left and right sealing plates 2. A drive motor 301 for the trimming assembly 3 is fixedly installed on the top of each sealing plate 2. A reciprocating screw 302 is fixedly installed on the output shaft of the drive motor 301. The reciprocating screw 302 is located inside the groove 206. A movable frame 303 is threadedly mounted on the circumferential surface of the reciprocating screw 302. The movable frame 303 is slidably installed inside the groove 206. Figure 6 As shown.

[0051] Furthermore, a first motor 304 is fixedly installed at the upper edge of the outer side of the movable frame 303. A first grooved wheel 305 is fixedly installed on the output shaft of the first motor 304. A second grooved wheel 306 is rotatably installed on the upper outer side of the movable frame 303. Tracks are rotatably installed on the circumferential surfaces of the first grooved wheel 305 and the second grooved wheel 306. A lead screw 307 is rotatably installed from the upper end of the second grooved wheel 306 to the inside of the movable frame 303. The lead screw 307 and the second grooved wheel 306 are threadedly connected. A ring 308 is fixedly installed at the lower end of the lead screw 307.

[0052] During use, the first motor 304 is started, and the first motor 304 drives the track through the first grooved wheel 305. The track drives the second grooved wheel 306, and the second grooved wheel 306 drives the lead screw 307 to rotate. When the lead screw 307 rotates, it can move the ring 308 up and down.

[0053] A second motor 317 is fixedly installed at the lower outer edge of the movable frame 303. A convex shaft 318 is fixedly installed on the output shaft of the second motor 317 and inside the movable frame 303. A connecting slip ring 310 is slidably installed on the outer circumferential surface of the convex shaft 318. Figure 7 As shown.

[0054] It should be noted that two protrusions extend outward from the circumferential surface of the convex shaft 318, while two U-shaped matching grooves are provided on the inner circumferential surface from the upper end to the lower end of the connecting slip ring 310, which are used to allow the connecting slip ring 310 to slide and connect with the convex shaft 318.

[0055] A trapezoidal plate 309 is fixedly installed at the lower end of the connecting slip ring 310. The internal structure of the trapezoidal plate 309 matches the convex shaft 318, while the outer circumferential surface of the connecting slip ring 310 is a recessed structure, and the ring 308 is located inside the recessed structure.

[0056] Therefore, when the ring 308 moves up and down, it will cause the connecting slip ring 310 to move up and down synchronously, which in turn causes the trapezoidal plate 309 to slide up and down.

[0057] Then, two symmetrical rotating rods 311 are rotatably mounted on the lower outer side of the movable frame 303. An adjusting wheel 312 is rotatably mounted on the upper left side of each rotating rod 311, and a trimming motor 313 is fixedly mounted inside the other end. A third grooved wheel 314 is fixedly mounted on the output shafts at both ends of the trimming motor 313. Then, a fourth grooved wheel 315 is rotatably mounted on the upper and lower surfaces of one end of the rotating rod 311. A grinding belt 316 is rotatably mounted on the circumference of both the fourth grooved wheel 315 and the third grooved wheel 314. Figure 10 As shown.

[0058] It should be noted that the rotating rod 311 and the moving frame 303 are connected by a strong force. The rotating rod 311 will generate a self-resetting force, so that the two ends on the left side are always close to each other. However, due to the interference of the trapezoidal plate 309, the rotating rod 311 can be in a parallel or tilted state.

[0059] Start the trimming motor 313. The output shaft of the trimming motor 313 drives the third grooved wheel 314 to rotate. The rotation of the third grooved wheel 314 drives the grinding belt 316 to rotate synchronously with the fourth grooved wheel 315.

[0060] By adjusting the size of the trapezoidal plate 309, the left side of the rotating rod 311 can be moved closer or further away, thereby adjusting the distance between the two grinding belts 316 on the right side to be closer or further away, thus enabling grinding operations on different protruding parts.

[0061] Working principle:

[0062] During operation, when the main motor 103 is started, the output shaft of the main motor 103 rotates the adjusting rod 104, and the rotation of the adjusting rod 104 rotates the connecting rod 105. When the connecting rod 105 rotates, it will carry the moving rod 106 to slide along the path of the sliding rod 102 through the slide groove 107, so that the moving rod 106 and the arc plate 108 can be combined into a ring structure.

[0063] Hollow columns 109 are fixedly installed on the inner circumferential surfaces of the two left and right arc plates 108. Springs 110 are fixedly installed inside the hollow columns 109. Arc-shaped clamping plates 111 are fixedly installed on one side of the springs 110. One side of the arc-shaped clamping plates 111 is slidably installed inside the hollow columns 109.

[0064] The spring 110 allows the arc-shaped clamping plate 111 to clamp the lower end of the inner automotive parts, ensuring that there is no tilting during the trimming process.

[0065] A sealing plate 2 is fixedly installed on the top of the arc plate 108, and the two sealing plates 2 on the left and right can be combined to form a sealed cuboid structure.

[0066] During the grinding operation, after the blower 205 is started, it can draw air into the cavity box 204 through the connecting pipe 201. At this time, the water pump is started, and the water pump delivers the water source inside the water tank 202 to the cavity box 204. When the water source is delivered to the cavity box 204, it is in the form of mist, which suppresses the dust and then discharges it through the blower 205.

[0067] Furthermore, the first motor 304 is started, and the first motor 304 drives the track through the first grooved wheel 305. The track drives the second grooved wheel 306, and the second grooved wheel 306 drives the lead screw 307 to rotate. When the lead screw 307 rotates, it can move the ring 308 up and down.

[0068] The circular ring 308 slides up and down, causing the connecting slip ring 310 to slide up and down, which in turn causes the trapezoidal plate 309 to slide up and down.

[0069] Start the trimming motor 313. The output shaft of the trimming motor 313 drives the third grooved wheel 314 to rotate. The rotation of the third grooved wheel 314 drives the grinding belt 316 to rotate synchronously with the fourth grooved wheel 315.

[0070] It should be noted that when the second motor 317 is started, the output shaft of the second motor 317 rotates the cam shaft 318. Since there are two outward protrusions on the circumferential surface of the cam shaft 318, and two inward concavities on the inner circumferential surface of the connecting slip ring 310, the protruding position of the cam shaft 318 matches the concave position of the connecting slip ring 310. Thus, the cam shaft 318 can rotate the connecting slip ring 310 synchronously. During the rotation, since the outer circumferential surface of the connecting slip ring 310 is a concave structure, and the ring 308 extends into the interior of the concave structure, the problem of the connecting slip ring 310 falling automatically is prevented. Therefore, when the connecting slip ring 310 rotates, it will rotate the trapezoidal plate 309 synchronously.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A trimming device for processing and forming automotive parts, characterized in that: Includes a tooling table (1), above which are symmetrical sealing plates (2), the number of sealing plates (2) is two, and the two sealing plates (2) form a box-shaped structure with an internal cavity; The inner sidewall of the sealing plate (2) is slidably provided with trimming components (3), the trimming components (3) include a movable frame (303), and a trapezoidal plate (309) is rotatably provided on the outer side of the movable frame (303). The lower outer side of the movable frame (303) is rotatably mounted with symmetrical rotating rods (311). Each rotating rod (311) is rotatably mounted with an adjusting wheel (312) on the upper part of one end near the movable frame (303). The adjusting wheel (312) is in contact with the outer side of the trapezoidal plate (309). The other end of the rotating rod (311) is rotatably equipped with a grinding belt (316) on both the upper and lower sides. The sealing plate (2) has a vertical groove (206) on its inner sidewall. The upper end of the sealing plate (2) is provided with a drive motor (301) in the trimming assembly (3). A reciprocating screw (302) is fixedly installed on the output shaft of the drive motor (301). The reciprocating screw (302) is located inside the groove (206). A movable frame (303) is slidably installed inside the groove (206). The movable frame (303) and the reciprocating screw (302) are rotatably connected by threads. A first motor (304) is fixedly installed at the upper end of the movable frame (303). A first grooved wheel (305) is fixedly installed on the output shaft of the first motor (304). A drive belt is rotatably installed on the circumferential surface of the first grooved wheel (305), and a second grooved wheel (306) is rotatably installed at the other end of the inner side of the drive belt. The second grooved wheel (306) is located above the movable frame (303). A lead screw (307) is rotatably mounted on the upper end of the movable frame (303). The upper end of the lead screw (307) is threadedly connected to the second grooved wheel (306). A ring (308) is fixedly mounted on the lower end face of the lead screw (307). A second motor (317) is fixedly mounted on the lower end face of the movable frame (303). A convex shaft (318) is fixedly mounted on the output shaft of the second motor (317) and located inside the movable frame (303). A connecting slip ring (310) is slidably mounted on the outer circumferential surface of the convex shaft (318). The outer circumferential surface of the connecting slip ring 310 is a concave structure, and the ring 308 is located inside the concave structure. A trapezoidal plate (309) is fixedly installed at the lower end of the connecting slip ring (310). A trimming motor (313) is fixedly installed inside the end of the rotating rod (311) away from the trapezoidal plate (309). A third grooved wheel (314) is fixedly installed on the upper and lower output shafts of the trimming motor (313). A fourth grooved wheel (315) is rotatably installed on the upper and lower sides of the outer end of the rotating rod (311). A grinding belt (316) is rotatably installed on the circumferential surfaces of the fourth grooved wheel (315) and the third grooved wheel (314).

2. The trimming equipment for processing and forming automotive parts according to claim 1, characterized in that: The tooling table (1) has two through slots (101) symmetrically arranged from the upper end to the lower end. The tooling table (1) has a symmetrical sliding rod (102) fixedly installed on the lower end, parallel to the through slots (101).

3. A trimming device for processing and forming automotive parts according to claim 2, characterized in that: A movable rod (106) is slidably installed on the outer surface of the slide rod (102). Slide grooves (107) are provided on the left and right sides of both ends of the movable rod (106). The slide rod (102) is slidably installed inside the slide grooves (107). An arc plate (108) is fixedly installed on the upper end of the movable rod (106).

4. A trimming device for processing and forming automotive parts according to claim 3, characterized in that: A cavity column (109) is fixedly installed on the inner circumferential surface of the arc plate (108). A spring (110) is fixedly installed inside the cavity column (109). An arc-shaped clamping plate (111) is fixedly installed on one side of the spring (110). One side of the arc-shaped clamping plate (111) is slidably installed inside the cavity column (109).

5. A trimming device for processing and forming automotive parts according to claim 1, characterized in that: A main motor (103) is fixedly installed on the lower end face of the tooling table (1). An adjusting rod (104) is fixedly installed on the output shaft of the main motor (103). A connecting rod (105) is rotatably installed on the lower part of both the front and rear ends of the adjusting rod (104). The ends of the two connecting rods (105) away from the adjusting rod (104) are rotatably installed at the lower center position of the moving rod (106).

6. A trimming device for processing and forming automotive parts according to claim 3, characterized in that: The upper end of the arc plate (108) is fixedly connected to the lower end of the adjacent sealing plate (2). L-shaped connecting pipes (201) are fixedly installed on both the front and rear sides of the sealing plate (2). A cavity box (204) is fixedly installed on the upper end of the connecting pipe (201). Three water tanks (202) are fixedly installed in a ring array on the outer side of the connecting pipe (201). A water supply pipe (203) is fixedly installed on the upper end of each water tank (202). The upper end of the water supply pipe (203) is fixedly connected to and passes through the upper end of the cavity box (204). A fan (205) is fixedly installed at the center of the upper end of the cavity box (204).

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