High-finish-degree bearing hub flange plate polishing equipment

Abstract

The utility model discloses a bearing hub flange plate polishing device with high finish, and relates to the technical field of high finish polishing, the bearing hub flange plate polishing device comprises a polishing mechanism and a main body, the output end of the back of a motor is fixedly connected with a first rotating shaft, and the front of a connecting table is rotatably connected with a rotating shaft; a rotating shaft is arranged at the top of the main body, a gear is rotationally connected to the front face of the rotating shaft, a plurality of gear racks are connected to the outer surface of the gear in a meshed mode, first sliding blocks are fixedly connected to the front faces of the gear racks, and sliding shafts are fixedly connected to the back faces of the gear racks. A motor on the left side of the grinding mechanism drives a first belt to rotate, meanwhile, the first belt drives a grinding disc to rotate and grind, a spring set on the inner wall of the grinding disc bears too large force when the grinding disc bears the too large force, when four gear racks move together, the whole grinding disc shrinks inwards, and the requirement for high smoothness of products is met; and the reject ratio of products is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-gloss polishing, and particularly relates to a polishing device for a bearing hub flange with high glossiness. Background Technique

[0002] A polishing machine, also known as a grinding machine, is commonly used for mechanical grinding, polishing, and waxing. The motor drives a sponge or wool polishing disc installed on the polishing machine to rotate at a high speed. Due to the combined action of the polishing disc and the polishing agent and the friction with the surface to be polished, the purpose of removing paint surface pollution, oxide layer, and shallow scratches can be achieved.

[0003] In the polishing machine grinding technology, the most important thing is to prevent the operator from making mistakes during grinding, resulting in unqualified grinding products. However, in the existing polishing machine technology, the grinding disc does not have the function of automatically adjusting its position. If the operator applies too much force, it is very likely that the grinding product will be over-ground, resulting in unqualified grinding products. Therefore, there is an urgent need for a polishing device for a bearing hub flange with high glossiness to solve the existing problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a polishing device for a bearing hub flange with high glossiness. By the overall inward contraction of the grinding disc, the problem that the force applied by the operator during grinding changes, the grinding disc cannot always contact the surface of the grinding product, and the product cannot meet the requirements of high glossiness is solved.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model is a polishing device for a bearing hub flange with high glossiness, including a grinding mechanism and a main body. A fixing mechanism is arranged on the right side of the grinding mechanism, and a cleaning mechanism is arranged on the front of the grinding mechanism. A connecting platform is fixedly connected to the top of the main body. A second rotating shaft is rotatably connected to the back of the connecting platform. The outer surface of the second rotating shaft is drivingly connected with a first belt, and the other end of the first belt is drivingly connected with a first rotating shaft. A motor is fixedly connected to the top of the main body, and the output end of the motor on the back is fixedly connected with the first rotating shaft. A rotating shaft is rotatably connected to the front of the second rotating shaft, and a gear is rotatably connected to the front of the rotating shaft. A plurality of gear racks are meshingly connected to the outer surface of the gear, and a first sliding block is fixedly connected to the front of the gear rack, and a sliding shaft is fixedly connected to the back of the gear rack.

[0007] Furthermore, the back side of the sliding shaft is in contact with a grinding disc, and an arc-shaped groove is provided on the front side of the grinding disc. A flexible channel is provided between every two arc-shaped grooves to ensure that the gear bar will not rotate together due to the rotation of the grinding disc. The outer surface of the sliding shaft is slidably connected to the inner wall of the arc-shaped groove. There are four grinding discs in total, and the four grinding discs are arranged in a circular array with the gear as the center. A spring group is fixedly connected to the outer surface of the rotating shaft, and the end of the spring group away from the rotating shaft is fixedly connected to the inner wall of the grinding disc.

[0008] Furthermore, there are four spring groups in total, and the parts contained in the four spring groups are the same. The four spring groups are arranged in a circular array with the rotating shaft as the center to ensure that the grinding disc will shrink normally when subjected to external force. A support shaft is sleeved on the outer surface of the spring group, the inner wall of the grinding disc is fixedly connected to the outer wall of the support shaft, the inner wall of the support shaft is fixedly connected to the outer surface of the rotating shaft, a dust cover is fixedly connected to the front of the connecting platform, and the inner wall of the dust cover is slidably connected to the front of the first sliding block.

[0009] Furthermore, the fixing mechanism includes a main body 2 fixedly connected to the top of the main body, a trapezoidal groove is provided on the top of the main body 2 for fixing the polished product, a trapezoidal slider 1 is slidably connected to the inner wall of the trapezoidal groove, a trapezoidal slider 2 is slidably connected to the inner wall of the trapezoidal groove, a first support sheet is fixedly connected to the top of the trapezoidal slider 1, a second support sheet is fixedly connected to the outer surface of the first support sheet, a circular disk is in contact with the inside of the second support sheet, two circular disks are provided in total, and a fixed shaft is fixedly connected to the side where the two circular disks are close to each other.

[0010] Furthermore, the back side of the first supporting sheet is rotatably connected to a fourth rotating shaft, the outer surface of the fourth rotating shaft is transmission-connected to a second belt, the end of the second belt away from the fourth rotating shaft is transmission-connected to a third rotating shaft, the back side of the fourth rotating shaft is fixedly connected to a first fixed block, and the back side of the first fixed block is fixedly connected to a fixed column, to ensure that the operator can completely grind the circumference of the product by manually cranking the fixed column.

[0011] Furthermore, a third sliding block is fixedly connected to the upper surface of the second trapezoidal slider, a groove is provided on the inner wall of the third sliding block, a slider is slidably connected to the inner wall of the groove, a second sliding block is fixedly connected to the left side of the slider, a third fixed block is fixedly connected to the top of the second sliding block, a support block is contacted to the left side of the third fixed block, a second spring is fixedly connected to the right side of the third fixed block, and a pressing block is fixedly connected to the right side of the second spring for fixing the polished product.

[0012] Furthermore, a connecting block is fixedly connected to the left side of the pressing block. The left side of the connecting block penetrates through the third fixing block and extends to the outside. The left side of the connecting block is fixedly connected to the right side of the supporting block. A trapezoidal block is slidably connected to the inner wall of the second sliding block. A second fixing block is fixedly connected to the left side of the trapezoidal block. A first spring is fixedly connected to the right side of the second sliding block. The left side of the trapezoidal block penetrates through the second sliding block and extends to the outside. The left side of the trapezoidal block is fixedly connected to the right side of the first spring. When it is not necessary to polish both sides of the product, they can slide together without affecting the polishing of the circumference of the product.

[0013] Furthermore, the cleaning mechanism includes a water tank fixedly connected to the top of the main body. A water injection port is provided at the top of the water tank. A water pipe is fixedly connected to the top of the water tank. One end of the water pipe away from the water tank is fixedly connected to a spray head, which is used to ensure high surface finish when polishing the product.

[0014] The utility model has the following beneficial effects:

[0015] 1. By providing a polishing mechanism on the top of the main body of the utility model, when it is necessary to polish the product, the motor on the left side of the polishing mechanism drives the first belt to rotate. At the same time, the first belt drives the polishing disc to rotate and polish. When the operator applies too much force, the spring group on the inner wall of the polishing disc will bear the excessive force. At the same time, the gear bar on the front surface of the polishing disc will push the gear on the front surface of the rotating shaft to rotate. When the gear rotates, it will drive the other three gear bars to rotate together. When the four gear bars move together, the whole polishing disc will shrink inward. According to the force applied by the operator during polishing, it can ensure that the polishing disc always contacts the surface of the product to be polished, so as to meet the requirement of high surface finish of the product.

[0016] 2. By providing a fixing mechanism on the top of the main body of the utility model, when it is necessary to fix and polish the product to be polished, it is fixed by the fixing column on the back of the circular disc. At the same time, manually rotate the fixing column on the back of the first fixing block to drive the second belt to rotate, and then drive the third rotating shaft fixed on the back of the circular disc to rotate, so as to polish the circumference of the product to be polished. When it is necessary to polish the upper and lower ends, push the pressing block on the right side of the third fixing block and fix it through the supporting block on the left side of the third fixing block. When it is not necessary to polish the upper and lower ends, slide and fold by pulling the trapezoidal block on the left side of the second sliding block. During the polishing process, the cleaning mechanism located in front of the polishing mechanism will spray the cleaning agent to clean while polishing.

[0017] Of course, it is not necessary for any product implementing the utility model to achieve all the above advantages simultaneously. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 Overall schematic diagram of the grinding mechanism of the present utility model;

[0021] Figure 3 Schematic cross-sectional view of the grinding mechanism of the present utility model;

[0022] Figure 4 For the present utility model Figure 3 Enlarged view of part A in;

[0023] Figure 5 Overall schematic diagram of the fixing mechanism of the present utility model.

[0024] Figure 6 Schematic cross-sectional view of the fixing mechanism of the present utility model.

[0025] Figure 7 For the present utility model Figure 6 Enlarged view of part B in.

[0026] Figure 8 For the present utility model Figure 6 Enlarged view of part C in.

[0027] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0028] Grinding mechanism; 101, first belt; 102, first rotating shaft; 103, second rotating shaft; 104, dust cover; 105, gear bar; 106, spring group; 108, sliding shaft; 109, supporting shaft; 110, first sliding block; 111, gear; 112, arc groove; 113, main body; 114, connecting platform; 115, motor; 116, rotating shaft; 117, grinding disc; 2, fixing mechanism; 201, trapezoidal groove; 202, trapezoidal slider 1; 203, first fixing block; 204, second belt; 205, fixing shaft; 206, third rotating shaft; 2 07. Fourth rotating shaft; 208. Groove; 209. Support block; 210. Second fixed block; 211. First spring; 212. Trapezoidal block; 213. Sliding block; 214. Second sliding block; 215. Third sliding block; 216. Second main body; 217. First supporting sheet; 218. Second supporting sheet; 219. Circular disk; 220. Fixed column; 221. Third fixed block; 222. Second spring; 223. Pressing block; 224. Connecting block; 225. Second trapezoidal sliding block; 3. Cleaning mechanism; 301. Water inlet; 302. Water pipe; 303. Sprinkler; 304. Water tank. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figures 1-8 As shown, the utility model is a special grinding device for steel materials for house construction, comprising a grinding mechanism 1 and a main body 113, a fixing mechanism 2 is arranged on the right side of the grinding mechanism 1, a cleaning mechanism 3 is arranged on the front side of the grinding mechanism 1, a connecting platform 114 is fixedly connected to the top of the main body 113, a second rotating shaft 103 is rotatably connected to the back side of the connecting platform 114, a first belt 101 is transmission-connected to the outer surface of the second rotating shaft 103, a first belt 101 is transmission-connected to the other end of the first belt 101 is transmission-connected to the first rotating shaft 102, a motor 115 is fixedly connected to the top of the main body 113, a back output end of the motor 115 is fixedly connected to the first rotating shaft 102, a rotating shaft 116 is rotationally connected to the front side of the second rotating shaft 103, a gear 111 is rotationally connected to the front side of the rotating shaft 116, a gear 111 is meshingly connected to a plurality of gear bars 105 on the outer surface of the gear bar 105, a first sliding block 110 is fixedly connected to the front side of the gear bar 105, and a sliding shaft 108 is fixedly connected to the back side of the gear bar 105.

[0031] The back of the sliding shaft 108 contacts a grinding disc 117 , and the front of the grinding disc 117 is provided with an arc groove 112 . The outer surface of the sliding shaft 108 is slidably connected to the inner wall of the arc groove 112 . There are four grinding discs 117 in total, and the four grinding discs 117 are arranged in a ring array with the gear 111 as the center.

[0032] A spring assembly 106 is fixedly connected to the outer surface of the rotating shaft 116 , and one end of the spring assembly 106 away from the rotating shaft 116 is fixedly connected to the inner wall of the grinding disc 117 .

[0033] There are four spring groups 106 in total, and the parts contained in the four spring groups 106 are the same. The four spring groups 106 are arranged in a circular array with the rotating shaft 116 as the center. The outer surface of the spring group 106 is sleeved with a support shaft 109, the inner wall of the grinding disc 117 is fixedly connected to the outer wall of the support shaft 109, and the inner wall of the support shaft 109 is fixedly connected to the outer surface of the rotating shaft 116. The front side of the connecting platform 114 is fixedly connected to a dust cover 104, and the inner wall of the dust cover 104 is slidably connected to the front side of the first sliding block 110.

[0034] The fixing mechanism 2 includes a main body 216 fixedly connected to the top of the main body 113, a trapezoidal groove 201 is opened on the top of the main body 216, a trapezoidal slider 202 is slidably connected to the inner wall of the trapezoidal groove 201, a trapezoidal slider 225 is slidably connected to the inner wall of the trapezoidal groove 201, a first support sheet 217 is fixedly connected to the top of the trapezoidal slider 202, a second support sheet 218 is fixedly connected to the outer surface of the first support sheet 217, a circular disk 219 is in contact with the inside of the second support sheet 218, two circular disks 219 are provided in total, and a fixed shaft 205 is fixedly connected to the side where the two circular disks 219 are close to each other.

[0035] The back side of the first supporting plate 217 is rotatably connected to the fourth rotating shaft 207, the outer surface of the fourth rotating shaft 207 is transmission-connected to the second belt 204, the end of the second belt 204 away from the fourth rotating shaft 207 is transmission-connected to the third rotating shaft 206, the back side of the fourth rotating shaft 207 is fixedly connected to the first fixed block 203, and the back side of the first fixed block 203 is fixedly connected to the fixed column 220.

[0036] A third slider 215 is fixedly connected to the upper surface of the trapezoidal slider two 225. A groove 208 is provided in the inner wall of the third slider 215. A slider 213 is slidably connected to the inner wall of the groove 208. A second slider 214 is fixedly connected to the left side of the slider 213. A third fixing block 221 is fixedly connected to the top of the second slider 214. A support block 209 is in contact with the left side of the third fixing block 221. A second spring 222 is fixedly connected to the right side of the third fixing block 221. A pressing block 223 is fixedly connected to the right side of the second spring 222.

[0037] A connecting block 224 is fixedly connected to the left side of the pressing block 223. The left side of the connecting block 224 penetrates through the third fixing block 221 and extends to the outside. The left side of the connecting block 224 is fixedly connected to the right side of the support block 209. A trapezoidal block 212 is slidably connected to the inner wall of the second slider 214. A second fixing block 210 is fixedly connected to the left side of the trapezoidal block 212. A first spring 211 is fixedly connected to the right side of the second slider 214. The left side of the trapezoidal block 212 penetrates through the second slider 214 and extends to the outside. The left side of the trapezoidal block 212 is fixedly connected to the right side of the first spring 211.

[0038] The cleaning mechanism 3 includes a water tank 304 fixedly connected to the top of the main body 113. A water injection port 301 is provided in the top of the water tank 304. A water pipe 302 is fixedly connected to the top of the water tank 304. One end of the water pipe 302 away from the water tank 304 is fixedly connected to a spray head 303.

[0039] A specific application of this embodiment is:

[0040] When the staff needs to use the device, the utility model is provided with a grinding mechanism 1 at the top of the main body 113. When the product needs to be polished, the motor 115 on the left side of the grinding mechanism 1 drives the first belt 101 to rotate. At the same time, the first belt 101 drives the second rotating shaft 103 to rotate, the second rotating shaft 103 drives the rotating shaft 116 to rotate, the rotating shaft 116 drives the support shaft 109 to rotate, and the support shaft 109 drives the grinding disc 117 to rotate and grind. When the operator applies too much force, the spring group 106 on the inner wall of the grinding disc 117 will bear the excessive force. At the same time, the gear bar 105 on the front surface of the grinding disc 117 will push the gear 111 on the front surface of the rotating shaft 116 to rotate. When the gear 111 rotates, it will drive the other three gear bars 105 to rotate together. When the four gear bars 105 move together, the whole grinding disc 117 will shrink inward to ensure that the grinding disc 117 can always be in contact with the grinding surface of the product, so as to ensure that the grinding of the product can meet the requirements of high surface finish and prevent the product from being unqualified due to the operator's mistake. When the grinding product needs to be fixed for grinding, the product is clamped and fixed by the fixing column 220 on the back of the circular disc 219. At the same time, the trapezoidal slider 202 is rotated. The rotation of the trapezoidal slider 202 drives the first fixing block 203 to rotate. Then, the rotation of the first fixing block 203 drives the fourth rotating shaft 207 to rotate. Then, when the fourth rotating shaft 207 rotates, it drives the second belt 204 to rotate and makes the third rotating shaft 206 rotate synchronously. Then, the rotation of the third rotating shaft 206 drives the circular disc 219 to rotate, so that the product can rotate, and then the outer ring of the grinding product is ground. When the two sides of the product need to be ground, first push the pressing block 223 to the left. When the pressing block 223 moves to the left, it drives the connecting block 224 to move. Then, the movement of the connecting block 224 drives the support block 209 to move. Then, the product is placed between the support block 209 and the third fixing block 221, and the pressing block 223 is released. At this time, the connecting block 224 rebounds and pulls the pressing block 223 to the right, and drives the support block 209 to move to fix the product. When the two sides do not need to be ground, pull the second fixing block 210 to the left to drive the trapezoidal block 212 to move, so that the trapezoidal block 212 disengages from the third sliding block 215, so that the second sliding block 214 can move downward for storage. The trapezoidal block 212 on the left side of the second sliding block 214 is slid and folded by pulling. During the grinding process, the water pump is started. The water pump sends the cleaning agent in the water tank 304 into the nozzle 303 through the water pipe 302 and sprays it on the grinding area to clean while grinding, preventing debris from adhering to the grinding product and making the grinding effect unsatisfactory.

[0041] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0042] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A high-finish bearing hub flange polishing device, comprising a polishing mechanism (1) and a main body (113), wherein a fixing mechanism (2) is arranged on the right side of the polishing mechanism (1), and a cleaning mechanism (3) is arranged on the front side of the polishing mechanism (1), characterized in that: The top of the main body (113) is fixedly connected to a connecting platform (114); the back of the connecting platform (114) is rotatably connected to a second rotating shaft (103); the outer surface of the second rotating shaft (103) is transmission-connected to a first belt (101); the other end of the first belt (101) is transmission-connected to a first rotating shaft (102); the top of the main body (113) is fixedly connected to a motor (115); the bottom output end of the motor (115) is fixedly connected to the front of the first rotating shaft (102); the front of the second rotating shaft (103) is rotatably connected to a rotating shaft (116); the front of the rotating shaft (116) is rotatably connected to a gear (111); the outer surface of the gear (111) is meshingly connected to a plurality of gear bars (105); the front of the gear bars (105) is fixedly connected to a first sliding block (110); and the back of the gear bars (105) is fixedly connected to a sliding shaft (108).

2. The high-finish bearing hub flange polishing equipment according to claim 1 is characterized in that: The back side of the sliding shaft (108) contacts a grinding disc (117), the front side of the grinding disc (117) is provided with an arc-shaped groove (112), the outer surface of the sliding shaft (108) is slidably connected to the inner wall of the arc-shaped groove (112), there are four grinding discs (117) in total, and the four grinding discs (117) are arranged in a ring array with the gear (111) as the center.

3. The high-finish bearing hub flange polishing equipment according to claim 2 is characterized in that: A spring group (106) is fixedly connected to the outer surface of the rotating shaft (116), and one end of the spring group (106) away from the rotating shaft (116) is fixedly connected to the inner wall of the grinding disc (117).

4. The high-finish bearing hub flange polishing equipment according to claim 3 is characterized in that: There are four spring groups (106) in total, and the parts contained in the four spring groups (106) are the same. The four spring groups (106) are arranged in a ring array with the rotating shaft (116) as the center. The outer surface of the spring group (106) is sleeved with a support shaft (109), the inner wall of the grinding disc (117) is fixedly connected to the outer wall of the support shaft (109), and the inner wall of the support shaft (109) is fixedly connected to the outer surface of the rotating shaft (116). The front side of the connecting platform (114) is fixedly connected to a dust cover (104), and the inner wall of the dust cover (104) is slidably connected to the front side of the first sliding block (110).

5. The high-finish bearing hub flange polishing equipment according to claim 4 is characterized in that: The fixing mechanism (2) comprises a second main body (216) fixedly connected to the top of the main body (113); a trapezoidal groove (201) is provided on the top of the second main body (216); a trapezoidal slider (202) is slidably connected to the inner wall of the trapezoidal groove (201); a trapezoidal slider (225) is slidably connected to the inner wall of the trapezoidal groove (201); a first support sheet (217) is fixedly connected to the top of the trapezoidal slider (202); a second support sheet (218) is fixedly connected to the outer surface of the first support sheet (217); a circular disk (219) is contacted inside the second support sheet (218); two circular disks (219) are provided in total; a fixed shaft (205) is fixedly connected to the sides of the two circular disks (219) that are close to each other.

6. The high-finish bearing hub flange polishing equipment according to claim 5, characterized in that: The back side of the first supporting plate (217) is rotatably connected to a fourth rotating shaft (207); the outer surface of the fourth rotating shaft (207) is transmission-connected to a second belt (204); one end of the second belt (204) away from the fourth rotating shaft (207) is transmission-connected to a third rotating shaft (206); the back side of the fourth rotating shaft (207) is fixedly connected to a first fixing block (203); and the back side of the first fixing block (203) is fixedly connected to a fixing column (220).

7. The high-finish bearing hub flange polishing equipment according to claim 6, characterized in that: A third sliding block (215) is fixedly connected to the upper surface of the second trapezoidal sliding block (225); a groove (208) is provided on the inner wall of the third sliding block (215); a sliding block (213) is slidably connected to the inner wall of the groove (208); a second sliding block (214) is fixedly connected to the left side of the sliding block (213); a third fixed block (221) is fixedly connected to the top of the second sliding block (214); a support block (209) is contacted on the left side of the third fixed block (221); a second spring (222) is fixedly connected to the right side of the third fixed block (221); and a pressing block (223) is fixedly connected to the right side of the second spring (222).

8. The high-finish bearing hub flange polishing equipment according to claim 7, characterized in that: The left side of the pressing block (223) is fixedly connected to a connecting block (224); the left side of the connecting block (224) penetrates the third fixed block (221) and extends to the outside; the left side of the connecting block (224) is fixedly connected to the right side of the supporting block (209); the inner wall of the second sliding block (214) is slidably connected to a trapezoidal block (212); the left side of the trapezoidal block (212) is fixedly connected to the second fixed block (210); the right side of the second sliding block (214) is fixedly connected to a first spring (211); the left side of the trapezoidal block (212) penetrates the second sliding block (214) and extends to the outside; the left side of the trapezoidal block (212) is fixedly connected to the right side of the first spring (211).

9. The high-finish bearing hub flange polishing equipment according to claim 1, characterized in that: The cleaning mechanism (3) comprises a water tank (304) fixedly connected to the top of the main body (113); a water inlet (301) is provided on the top of the water tank (304); a water pipe (302) is fixedly connected to the top of the water tank (304); and one end of the water pipe (302) away from the water tank (304) is fixedly connected to the nozzle (303).

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