A bagel forming machine

By designing a bagel forming machine, the automatic forming of bagels is achieved through a combination of conveyor belts and forming rods, solving the problems of low efficiency and unstable quality of manual forming, and improving bagel production efficiency and quality.

CN224419935UActive Publication Date: 2026-06-30ANHUI ZHONGLE FOOD MACHINERY

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ANHUI ZHONGLE FOOD MACHINERY
Filing Date
2025-07-15
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In bagel production, manual shaping is inefficient and the quality is difficult to guarantee.

Method used

Design a bagel forming machine that uses a combination of conveyor belt and forming rod to roll dough into a cylindrical shape and form a ring-shaped structure inside the directional cylinder, thus achieving automatic forming.

Benefits of technology

It improved bagel forming efficiency and quality, reduced the labor intensity of workers, and enhanced product quality.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a bagel forming machine, relating to the field of food processing equipment technology. The utility model includes a support assembly; a conveying assembly is horizontally mounted on the upper part of the support assembly; the conveying assembly includes a support plate horizontally fixed to the support assembly; each end of the opposite edge of the support plate has a pair of first extensions and a pair of second extensions; a first roller is rotatably connected between the two first extensions; a second roller is rotatably connected between the two second extensions; the second roller and the first roller are connected by a conveyor belt; a directional cylinder corresponding to the conveyor belt is horizontally fixed on the upper surface of the support plate; the upper section of the conveyor belt is inserted into the inner side of the directional cylinder; a forming rod is coaxially fixed to the inner side of the directional cylinder. This utility model not only has a reasonable structural design and is easy to use, but also effectively improves the bagel forming efficiency and has high market application value.
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Description

Technical Field

[0001] This utility model belongs to the technical field of food processing equipment, and in particular relates to a bagel forming machine. Background Technology

[0002] Bagels are round bread cakes made from yeast-leavened dough. They have a concentric circle structure, resemble donuts, and have a crispy exterior and chewy interior. They are not greasy, are satisfying to eat, and are versatile with various dishes.

[0003] Currently, bagel production typically involves manually shaping the dough. This requires first kneading the dough into strips, then pinching the ends together to form a circle. This not only affects production efficiency but also compromises bagel quality. Therefore, there is an urgent need to research and develop a bagel shaping machine to address these issues. Utility Model Content

[0004] The present invention provides a bagel forming machine, the purpose of which is to solve the technical problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a bagel forming machine, comprising a support assembly; a conveying assembly is horizontally mounted on the upper part of the support assembly; the conveying assembly includes a support plate horizontally fixed to the support assembly; the support plate has a pair of first extensions and a pair of second extensions at opposite edges; a first roller is rotatably connected between the two first extensions; a second roller is rotatably connected between the two second extensions; the second roller and the first roller are connected by a conveyor belt; a directional cylinder corresponding to the conveyor belt is horizontally fixed on the upper surface of the support plate; the upper section of the conveyor belt is inserted into the inner side of the directional cylinder; a forming rod is coaxially fixed to the inner side of the directional cylinder.

[0007] As a preferred embodiment of this utility model, the support assembly includes a horizontally arranged bottom support frame; multiple pillars are vertically fixed on the upper surface of the bottom support frame; the upper ends of the multiple pillars are all fixed to the lower surface of the support plate; multiple casters and multiple adjustable pads are vertically connected to the lower surface of the bottom support frame; one end of the first roller is connected to the output end of a motor module; the motor module is fixed to a pillar.

[0008] As a preferred embodiment of this utility model, a guide plate and an extrusion plate are horizontally arranged on the inner side and above the conveyor belt; the guide plate and the extrusion plate are both located on the side of the directional cylinder near the input end of the conveyor belt; the guide plate is fixed to the upper surface of the support plate, and the two ends of one edge of the guide plate near the directional cylinder are bent upwards and form an arc shape; the extrusion plate is mounted on an installation assembly; the two ends of one edge of the extrusion plate near the directional cylinder and the two ends of one edge away from the directional cylinder are both bent upwards and form an arc shape, and the diameter of the arc shape formed by the extrusion plate near the directional cylinder is smaller than the diameter of the arc shape formed by its edge away from the directional cylinder; a material conveying gap is formed between the extrusion plate and the conveyor belt.

[0009] As a preferred embodiment of this utility model, the mounting assembly includes a pair of first mounting plates vertically disposed on opposite sides of a support plate; a pair of through slots are vertically formed on opposite sides of each of the two first mounting plates; positioning posts are inserted into the two pairs of through slots; the two pairs of positioning posts are fixed to opposite sides of the first mounting plates; the upper edges of the two first mounting plates are connected by a second mounting plate; a pair of adjusting rods are vertically fixed on the upper surface of the second mounting plate; the lower ends of the two adjusting rods are fixed to the upper surface of the extrusion plate.

[0010] As a preferred embodiment of this utility model, the directional cylinder includes a horizontally arranged first semicircular plate and a horizontally arranged second semicircular plate above the first semicircular plate; the first and second semicircular plates can be combined to form a cylindrical structure, and the conveyor belt is inserted into the cylindrical structure; the first semicircular plate is fixed to the upper surface of the support plate by multiple side-by-side brackets; side support bars are horizontally fixed to the opposite sides of the first and second semicircular plates, and the two side support bars in the upper and lower positions are connected; multiple heat dissipation holes are evenly distributed on the circumferential side surfaces of the first and second semicircular plates; both ends of the first and second semicircular plates have outward flanges, and when the two first and second semicircular plates are combined, a trumpet-shaped structure is formed between the two outward flanges in the upper and lower positions.

[0011] In a preferred embodiment of this utility model, the forming rod is coaxially disposed within the cylindrical structure formed by the merging of the first and second semicircular plates, and the forming rod is connected to the directional cylinder via a bearing assembly. The bearing assembly includes a bearing strip horizontally fixed above the second semicircular plate; a pair of bearing rods are vertically fixed side-by-side on the bearing strip; the lower ends of both bearing rods are fixed to the circumferential side surface of the second semicircular plate; a plurality of connecting columns are vertically fixed side-by-side on the lower surface of one end of the bearing strip; the lower ends of the plurality of connecting columns are fixed to the end of the forming rod near the input end of the conveyor belt.

[0012] As a preferred embodiment of this utility model, cleaning components are horizontally installed on both sides of the conveyor belt; the cleaning components include mounting columns and support bars that are vertically fixed side by side to the upper surface of the support plate, and an operating rod horizontally set above the support plate; a limiting groove is vertically formed on one side of the support bar; a lifting sleeve corresponding to the mounting column is fixedly sleeved on the operating rod, and the upper end of the mounting column is slidably inserted into the circumferential side wall of the lifting sleeve; a brush head is fixed to one end of the operating rod; a locking block corresponding to the limiting groove is fixed to one side of the brush head; the locking block is engaged in the limiting groove, and the locking block can slide up and down in the limiting groove.

[0013] This utility model has the following beneficial effects:

[0014] This invention places dough on a conveyor belt, uses a directional cylinder to roll a portion of the conveyor belt inside the directional cylinder into a cylindrical structure, and then transports the dough to the directional cylinder via the conveyor belt. The dough is then squeezed by a forming rod, causing it to form a ring-shaped structure after exiting the directional cylinder, thus completing the bagel shaping. This not only effectively improves the bagel shaping efficiency and quality but also reduces the labor intensity of workers and improves the production quality of bagels.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a bagel forming machine according to the present invention.

[0018] Figure 2 for Figure 1The main view of the structure.

[0019] Figure 3 for Figure 1 Top view of the structure.

[0020] Figure 4 This is a schematic diagram of the conveying component of this utility model.

[0021] Figure 5 This is a schematic diagram of the connection between the conveying component, guide plate, and extrusion plate of this utility model.

[0022] Figure 6 for Figure 5 The main view of the structure.

[0023] Figure 7 This is a schematic diagram of the installation component of this utility model.

[0024] Figure 8 This is a schematic diagram of the connection between the directional cylinder and the forming rod of this utility model.

[0025] Figure 9 This is a schematic diagram of the connection between the directional cylinder and the load-bearing component of this utility model.

[0026] Figure 10 for Figure 9 The main view of the structure.

[0027] Figure 11 This is a schematic diagram showing the relative structure between the first and second semicircular plates of this utility model.

[0028] Figure 12 This is a schematic diagram of the cleaning component of this utility model.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1-Support assembly, 2-Conveying assembly, 3-Guide plate, 4-Extrusion plate, 5-Orienting cylinder, 6-Forming rod, 7-Mounting assembly, 8-Bearing assembly, 9-Cleaning assembly, 101-Bottom support frame, 102-Support column, 103-Wheel caster, 104-Adjustable pad, 201-Support plate, 202-First extension, 203-First roller, 204-Motor module, 205-Second extension, 206-Second roller, 207-Conveyor belt, 501-First semi-circular plate 502-Second semicircular plate, 503-Bracket, 504-Side support bar, 505-Heat dissipation hole, 506-Outward flange, 701-First mounting plate, 702-Through groove, 703-Positioning post, 704-Second mounting plate, 705-Adjusting rod, 801-Bearing plate bar, 802-Bearing rod, 803-Connecting post, 901-Mounting post, 902-Support bar, 903-Operating rod, 904-Limiting groove, 905-Lifting sleeve, 906-Brush head, 907-Card block. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1:

[0033] Please see Figure 1-4As shown, this utility model is a bagel forming machine, including a support assembly 1; a conveying assembly 2 is horizontally mounted on the upper part of the support assembly 1; the support assembly 1 includes a horizontally arranged bottom support frame 101; multiple pillars 102 are vertically welded to the upper surface of the bottom support frame 101; multiple conventional casters 103 and multiple conventional adjustable pads 104 are vertically connected to the lower surface of the bottom support frame 101; the conveying assembly 2 includes a support plate 201 horizontally bolted to the upper end of the multiple pillars 102; a pair of first extensions 202 and a pair of second extensions 205 are integrally formed at opposite edges of the support plate 201; the two first extensions 202... A first roller 203 is rotatably connected between 02; one end of the first roller 203 is connected to the output end of a conventional motor module 204 in this field; the motor module 204 is bolted to a support column 102; the motor module 204 consists of a servo motor and a chain reducer; a second roller 206 is rotatably connected between the two second extensions 205; the second roller 206 and the first roller 203 are connected by a conveyor belt 207; a directional cylinder 5 corresponding to the conveyor belt 207 is horizontally mounted on the upper surface of the support plate 201; the upper section of the conveyor belt 207 is inserted into the inner side of the directional cylinder 5; a forming rod 6 is coaxially mounted on the inner side of the directional cylinder 5. In use, the dough is placed on the conveyor belt 207, and the portion of the conveyor belt 207 interlaced within the directional cylinder 5 is rolled into a cylindrical structure by the directional cylinder 5. The dough is then transported to the directional cylinder 5 via the conveyor belt 207. The forming rod 6 compresses the dough, causing it to form a ring-shaped structure after exiting the directional cylinder 5, thus completing the bagel shaping. This not only effectively improves the bagel shaping efficiency and quality but also reduces the labor intensity of workers and improves the production quality of bagels.

[0034] Example 2:

[0035] Based on Example 1, as follows Figure 5-7As shown, guide plates 3 and extrusion plates 4 are horizontally arranged on the inner side and above the conveyor belt 207; both guide plates 3 and extrusion plates 4 are located on the side of the directional cylinder 5 near the input end of the conveyor belt 207; guide plates 3 are bolted to the upper surface of the support plate 201, and the two ends of one edge of the guide plate 3 near the directional cylinder 5 are bent upwards and form an arc shape; extrusion plates 4 are mounted on a mounting assembly 7; both ends of one edge of the extrusion plate 4 near the directional cylinder 5 and both ends of one edge away from the directional cylinder 5 are bent upwards and form an arc shape, and the diameter of the arc shape formed by the extrusion plate 4 near the directional cylinder 5 is smaller than the diameter of the arc shape formed by its edge away from the directional cylinder 5; the diameter of the arc shape formed by the guide plate 3 near the directional cylinder 5 is between the diameter of the arc shape formed by the extrusion plate 4 near the directional cylinder 5. The diameter is between the diameter of the arc-shaped structure formed by the edge of the extrusion plate 4 away from the directional cylinder 5; a material conveying gap is formed between the extrusion plate 4 and the conveyor belt 207; the mounting assembly 7 includes a pair of first mounting plates 701 respectively vertically arranged on opposite sides of the support plate 201; a pair of through slots 702 are vertically opened side by side on the opposite sides of the two first mounting plates 701; positioning pins 703 are inserted into the two pairs of through slots 702; the two pairs of positioning pins 703 are respectively bolted to the opposite sides of the first mounting plates 701; the upper edges of the two first mounting plates 701 are connected by a second mounting plate 704, and the two first mounting plates 701 and the second mounting plate 704 are bolted together; a pair of adjusting rods 705 are vertically bolted side by side on the upper surface of the second mounting plate 704; the lower ends of the two adjusting rods 705 are bolted to the upper surface of the extrusion plate 4. In use, after the dough is placed on the conveyor belt 207, the dough is conveyed by the conveyor belt 207 and squeezed by the extrusion plate 4, causing the dough to become a strip structure. By adjusting the vertical position of the positioning column 703 in the through groove 702, the distance between the extrusion plate 4 and the conveyor belt 207 is changed, thereby adjusting the thickness of the dough after it becomes a strip structure, thus achieving the adjustment of the thickness of the bagel after it is formed, and improving the forming quality of the bagel.

[0036] Example 3:

[0037] Based on Example 2, as follows Figure 8-11As shown, the directional cylinder 5 includes a horizontally arranged first semicircular plate 501 and a horizontally arranged second semicircular plate 502 above the first semicircular plate 501; the first semicircular plate 501 and the second semicircular plate 502 can be combined to form a cylindrical structure, and the conveyor belt 207 is inserted into the cylindrical structure; the first semicircular plate 501 is bolted to the upper surface of the support plate 201 by a plurality of side-by-side brackets 503; side support bars 504 are horizontally welded to the opposite sides of the first semicircular plate 501 and the opposite sides of the second semicircular plate 502, and the side support bars 504 in the upper and lower positions are connected by bolts; a plurality of heat dissipation holes 505 are evenly distributed on the circumferential side surfaces of the first semicircular plate 501 and the second semicircular plate 502; the two ends of the first semicircular plate 501 and the two ends of the second semicircular plate 502 are integrally formed The plate has an outward flange 506, and when the two first semicircular plates 501 and the second semicircular plate 502 are combined, a trumpet-shaped structure is formed between the two outward flanges 506 in the upper and lower positions; the forming rod 6 is coaxially arranged in the cylindrical structure formed by the combination of the first semicircular plate 501 and the second semicircular plate 502, and the forming rod 6 is connected to the directional cylinder 5 through the bearing assembly 8; the bearing assembly 8 includes a bearing strip 801 horizontally bolted to the upper part of the second semicircular plate 502; a pair of bearing rods 802 are vertically bolted side by side on the bearing strip 801; the lower ends of the two bearing rods 802 are bolted to the circumferential side surface of the second semicircular plate 502; a plurality of connecting columns 803 are vertically bolted side by side on the lower surface of one end of the bearing strip 801; the lower ends of the plurality of connecting columns 803 are bolted to the end of the forming rod 6 near the input end of the conveyor belt 207. In use, after the dough enters the cylindrical structure formed between the first semicircular plate 501 and the second semicircular plate 502, the forming rod 6 squeezes and deforms the dough, causing it to form a ring-shaped structure, effectively improving the bagel forming efficiency. Multiple heat dissipation holes 505 are evenly distributed on the circumferential sides of both the first and second semicircular plates 501 and 502, which not only reduces the friction between the conveyor belt 207 and the first and second semicircular plates 501 and 502, but also improves the efficiency of the conveyor belt 207. The heat dissipation efficiency is improved, ensuring the service life of the conveyor belt 207. Furthermore, by designing that both ends of the first semicircular plate 501 and both ends of the second semicircular plate 502 are integrally formed with outward flanges 506, and when the two first semicircular plates 501 and the second semicircular plate 502 are combined, a trumpet-shaped structure is formed between the two outward flanges 506 in the upper and lower positions. This not only ensures that the conveyor belt 207 can smoothly enter the cylindrical structure formed between the first semicircular plate 501 and the second semicircular plate 502, but also reduces the wear rate of the conveyor belt 207.

[0038] Example 4:

[0039] Based on Example 3, as follows Figure 3 and Figure 12 As shown, cleaning components 9 are horizontally installed on both sides of the conveyor belt 207. The cleaning components 9 include mounting posts 901 and support bars 902 that are vertically bolted to the upper surface of the support plate 201, and operating rods 903 that are horizontally set above the support plate 201. A limiting groove 904 is vertically opened on one side of the support bar 902. A lifting sleeve 905 corresponding to the mounting post 901 is fixedly sleeved on the operating rod 903, and the upper end of the mounting post 901 is slidably inserted into the circumferential side wall of the lifting sleeve 905. A conventional brush head 906 in the art is bolted to one end of the operating rod 903. A locking block 907 corresponding to the limiting groove 904 is integrally formed on one side of the brush head 906. The locking block 907 is locked in the limiting groove 904 and can slide up and down in the limiting groove 904. In use, the upper end of the mounting post 901 is slidably inserted into the circumferential side wall of the lifting sleeve 905, and the locking block 907 is engaged in the limiting groove 904, thereby positioning the brush head 906. When it is necessary to clean the surface of the conveyor belt 207, the operator moves the hand-held operating lever 903 upward to disengage the mounting post 901 from the lifting sleeve 905, and then removes the locking block 907 from the limiting groove 904. The worker then manually sweeps the surface of the conveyor belt 207 by holding the operating lever 903 and using the brush head 906, thus sweeping the debris off the edge of the conveyor belt 207. This method is not only simple in structure and easy to use, but also ensures the cleanliness of the surface of the conveyor belt 207 and the production quality of bagels.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A biallelic gene shaping machine, characterized in that, Includes support components (1); A conveying assembly (2) is horizontally mounted on the upper part of the support assembly (1); the conveying assembly (2) includes a support plate (201) horizontally fixed on the support assembly (1); the support plate (201) has a pair of first extensions (202) and a pair of second extensions (205) at its opposite edges; a first roller (203) is rotatably connected between the two first extensions (202); a second roller (206) is rotatably connected between the two second extensions (205); the second roller (206) and the first roller (203) are connected by a conveyor belt (207); a directional cylinder (5) corresponding to the conveyor belt (207) is horizontally fixed on the upper surface of the support plate (201); the upper section of the conveyor belt (207) is inserted into the inner side of the directional cylinder (5); a forming rod (6) is coaxially fixed on the inner side of the directional cylinder (5).

2. A Belfiore forming machine according to claim 1, characterized in that, The support assembly (1) includes a horizontally arranged bottom support frame (101); a plurality of pillars (102) are vertically fixed on the upper surface of the bottom support frame (101); the upper ends of the plurality of pillars (102) are all fixed on the lower surface of the support plate (201); a plurality of casters (103) and a plurality of adjustable pads (104) are vertically connected to the lower surface of the bottom support frame (101); one end of the first roller (203) is connected to the output end of a motor module (204); the motor module (204) is fixed on a pillar (102).

3. A Belfgort former according to claim 1 or 2, characterized in that The inner side and the top of the conveyor belt (207) are horizontally provided with guide plates (3) and extrusion plates (4); the guide plates (3) and extrusion plates (4) are both provided on the side of the directional cylinder (5) near the input end of the conveyor belt (207); the guide plates (3) are fixed on the upper surface of the support plate (201), and the two ends of the guide plates (3) near the directional cylinder (5) are bent upward and have an arc-shaped structure; the extrusion plates (4) are mounted on an installation assembly (7); the two ends of the extrusion plates (4) near the directional cylinder (5) and the two ends of the extrusion plates (4) away from the directional cylinder (5) are both bent upward and have an arc-shaped structure, and the diameter of the arc-shaped structure formed by the extrusion plates (4) near the directional cylinder (5) is smaller than the diameter of the arc-shaped structure formed by the extrusion plates (4) away from the directional cylinder (5); a material conveying gap is formed between the extrusion plates (4) and the conveyor belt (207).

4. A Belfgort former according to claim 3, wherein, The mounting assembly (7) includes a pair of first mounting plates (701) respectively vertically arranged on opposite sides of the support plate (201); a pair of through slots (702) are vertically arranged side by side on opposite sides of the two first mounting plates (701); positioning posts (703) are inserted into the two pairs of through slots (702); the two pairs of positioning posts (703) are respectively fixed on opposite sides of the first mounting plates (701); the upper edges of the two first mounting plates (701) are connected by a second mounting plate (704); a pair of adjusting rods (705) are vertically fixed side by side on the upper surface of the second mounting plate (704); the lower ends of the two adjusting rods (705) are fixed on the upper surface of the extrusion plate (4).

5. A Belfgou machine according to claim 1, characterized in that, The directional cylinder (5) includes a horizontally arranged first semicircular plate (501) and a horizontally arranged second semicircular plate (502) above the first semicircular plate (501); the first semicircular plate (501) and the second semicircular plate (502) can be combined to form a cylindrical structure, and the conveyor belt (207) is inserted into the cylindrical structure; the first semicircular plate (501) is fixed to the upper surface of the support plate (201) by a plurality of side-by-side brackets (503); the opposite sides of the first semicircular plate (501) and the opposite sides of the second semicircular plate (502) Side support bars (504) are horizontally fixed on both sides, and the two side support bars (504) in the upper and lower positions are connected to each other; multiple heat dissipation holes (505) are evenly distributed on the circumferential side surface of the first semicircular plate (501) and the circumferential side surface of the second semicircular plate (502); both ends of the first semicircular plate (501) and the two ends of the second semicircular plate (502) have outward flanges (506), and when the two first semicircular plates (501) and the second semicircular plate (502) are combined, a trumpet-shaped structure is formed between the two outward flanges (506) in the upper and lower positions.

6. A Belfgort former according to claim 5, wherein, The forming rod (6) is coaxially disposed within the cylindrical structure formed by the first semicircular plate (501) and the second semicircular plate (502) after being merged, and the forming rod (6) is connected to the directional cylinder (5) through a bearing assembly (8); the bearing assembly (8) includes a bearing strip (801) horizontally fixed above the second semicircular plate (502); a pair of bearing rods (802) are vertically fixed side by side on the bearing strip (801); the lower ends of the two bearing rods (802) are fixed to the circumferential side surface of the second semicircular plate (502); a plurality of connecting columns (803) are vertically fixed side by side on the lower surface of one end of the bearing strip (801); the lower ends of the plurality of connecting columns (803) are fixed to one end of the forming rod (6) near the input end of the conveyor belt (207).

7. A Belfgort former according to claim 5 or 6, characterized in that Cleaning components (9) are horizontally installed on both sides of the conveyor belt (207); the cleaning components (9) include mounting posts (901) and support bars (902) that are vertically fixed side by side to the upper surface of the support plate (201), and an operating rod (903) that is horizontally set above the support plate (201); a limit groove (904) is vertically opened on one side of the support bar (902); and the operating rod (903) is fixedly sleeved with a part opposite to the mounting post (901). The corresponding lifting sleeve (905) is provided, and the upper end of the mounting post (901) is slidably inserted into the circumferential side wall of the lifting sleeve (905); one end of the operating rod (903) is fixed with a brush head (906); one side of the brush head (906) is fixed with a locking block (907) corresponding to the limiting groove (904); the locking block (907) is engaged in the limiting groove (904), and the locking block (907) can slide up and down in the limiting groove (904).