Casing positioning mechanism

Abstract

The utility model relates to the technical field of air conditioner external unit casing boxes, in particular to a casing box positioning mechanism which is characterized in that an in-place detection photoelectric sensor enables a motor to stop rotating, so that a foam bottom support stays on a centering waiting area of a belt line assembly, then a positioning assembly moves the foam bottom support staying on the belt line assembly, and the foam bottom support stays on the belt line assembly. The foam bottom support is moved to the box sleeving waiting area, so that the convenience is improved, and the box sleeving efficiency is improved; comprising a rack, a belt line assembly, a positioning assembly, a motor, a motor adapter plate, a driving chain wheel, a chain, a driven chain wheel, an in-place detection photoelectric sensor and a photoelectric sensor support, the belt line assembly and the positioning assembly are arranged on the rack, the motor is installed on the rack through the motor adapter plate, and the driving chain wheel is arranged at the output end of the motor; a driven chain wheel is arranged on the belt line assembly, the driving chain wheel and the driven chain wheel are in transmission through a chain, a photoelectric sensor support is arranged on the belt line assembly, and an in-place detection photoelectric sensor is installed on the photoelectric sensor support.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioner external unit casings, in particular to a casing positioning mechanism. Background Art

[0002] The outdoor unit of the air conditioner is an important part of the air conditioning system. It is usually installed outdoors and is responsible for transferring indoor heat to the outdoors and discharging indoor moisture. The function of the outdoor unit of the air conditioner is to absorb indoor heat and moisture, discharge the heat to the outdoors through the circulation of refrigerant, and discharge the moisture to the outdoors through the condenser.

[0003] After the air conditioner outdoor unit is produced, it needs to be put into boxes. Generally, the air conditioner outdoor unit and the foam base are put into boxes manually, and the efficiency of putting boxes into boxes is low. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a box casing positioning mechanism which improves the box casing efficiency.

[0005] The utility model discloses a casing positioning mechanism, comprising a frame, a belt line assembly, a positioning assembly, a motor, a motor adapter plate, a driving sprocket, a chain, a driven sprocket, an in-place detection photoelectric sensor and a photoelectric sensor bracket, wherein the belt line assembly and the positioning assembly are respectively arranged on the frame, the motor is installed on the frame through the motor adapter plate, a driving sprocket is arranged at the output end of the motor, a driven sprocket is arranged on the belt line assembly, the driving sprocket and the driven sprocket are driven by a chain, a photoelectric sensor bracket is arranged on the belt line assembly, and an in-place detection photoelectric sensor is installed on the photoelectric sensor bracket; when in use, the motor is started, so that the driving sprocket drives the driven sprocket to rotate through the chain, so that the driven sprocket drives the belt line assembly to transport the foam bottom support, the air conditioner outdoor unit is installed in the foam bottom support, when the foam bottom support passes through the in-place detection photoelectric sensor, the in-place detection photoelectric sensor stops the motor from rotating, so that the foam bottom support stays on the centering waiting area of ​​the belt line assembly, and then the positioning assembly moves the foam bottom support staying on the belt line assembly, so that the foam bottom support moves to the casing waiting area, thereby improving convenience and improving casing efficiency.

[0006] Preferably, the belt line assembly includes a transmission shaft, an active synchronous wheel, an active side support, a belt line, a driven synchronous wheel, a driven shaft, a driven side support, a support plate and a bracket, two groups of support plates are respectively mounted on the frame through the brackets, one end of the two groups of support plates are respectively provided with an active side support, a group of transmission shafts are rotatably arranged between the two groups of active side supports, two groups of active synchronous wheels are installed on the transmission shaft, and a group of driven side supports are respectively arranged on the other ends of the two groups of support plates, each group of driven side supports are respectively rotatably arranged in a group of driven shafts, each group of driven shafts are respectively installed with a group of driven synchronous wheels, each group of active synchronous wheels is respectively transmitted with a group of driven synchronous wheels through a group of belt lines, and a driven sprocket is arranged at one end of the transmission shaft; start the motor, so that the driven sprocket drives the transmission shaft to rotate, and further makes the transmission shaft drive the two groups of active synchronous wheels to rotate, and the two groups of active synchronous wheels respectively drive the two groups of driven synchronous wheels to rotate through the corresponding belt lines, and the two groups of belt lines cooperate with each other to transport the foam bottom support.

[0007] Preferably, the positioning assembly includes a box centering assembly, a lifting cylinder and a synchronizer. The lifting cylinder and the synchronizer are arranged on the frame, and the top of the lifting cylinder is arranged with a box centering assembly. The synchronizer enables multiple groups of lifting cylinders to extend and shorten synchronously. When the lifting cylinder is extended, the box centering assembly performs front-to-back and left-to-right direction centering operations on the foam base supports on the two groups of belt lines, thereby improving the box installation efficiency.

[0008] Preferably, the box centering assembly includes a positioning plate, a slide rail, front and rear positioning cylinders, a cylinder push seat, a slider connecting plate, a left positioning cylinder, a right positioning cylinder, a left sleeve guide, a right sleeve guide, a front and rear sleeve guide, a rack, a cam follower, a gear assembly, a jacking connecting plate, a floating joint, a gear mounting plate and a pad. A group of jacking connecting plates are respectively arranged on both sides of the positioning plate, a group of floating joints are respectively arranged on each group of jacking connecting plates, and the bottom end of each group of floating joints is respectively connected to the top moving end of a group of jacking cylinders. A slide rail is arranged on the top of the positioning plate, and a front and rear positioning cylinder is arranged on the bottom end of the positioning plate. The two groups of slider connecting plates are slidably arranged. Installed on the slide rail, a group of slider connecting plates are provided with a cylinder push seat at the bottom end, and the moving ends of the front and rear positioning cylinders are connected to the cylinder push seat. A group of left positioning cylinders and right positioning cylinders are respectively provided at the top of each group of slider connecting plates. The left positioning cylinders and the right positioning cylinders are symmetrically installed. A group of left sleeve guides are provided at the moving end of each group of left positioning cylinders, and a group of right sleeve guides are respectively provided at the moving end of each group of right positioning cylinders. A group of front and rear sleeve guides are respectively provided at the top of each group of slider connecting plates. The two groups of left positioning cylinders and the two groups of right positioning cylinders are on the inner side of the two groups of front and rear sleeve guides. A group of racks are respectively provided at the bottom end of each group of slider connecting plates, and the positioning large plate A pad is provided at the top of the pad, a gear mounting plate is provided at the top of the pad, a gear assembly is rotatably provided on the gear mounting plate, two sets of racks are respectively meshed with the gear assemblies, two sets of cam followers are provided at the top of the positioning plate, the two sets of racks are between the two sets of cam followers, and the outer ends of the two sets of racks are respectively in rolling contact with one set of cam followers; the jacking cylinder is operated to rise, so that the top ends of the two sets of left sleeve box guides, the two sets of right sleeve box guides and the two sets of front and rear sleeve box guides extend to the tops of the two sets of belt lines, one set of belt lines is between the left sleeve box guide and the front and rear sleeve box guides, the other set of belt lines is between the right positioning cylinder and the front and rear sleeve box guides, and the front and rear sleeve box guides are between the two sets Between the belt lines, and then start the front and rear positioning cylinders to shorten, so that a set of slider connecting plates moves with the cooperation of the cylinder push seat, and this set of slider connecting plates drives the corresponding racks to move, and this set of racks moves another set of racks through the gear assembly, so that the two sets of slider connecting plates are mirror-imaged, and further the two sets of front and rear sleeve box guides perform front-to-back direction centering operations on the two sets of foam bottom supports on the belt lines, and then operate the two sets of left positioning cylinders and the two sets of right positioning cylinders to shrink synchronously, so that the two sets of left sleeve box guides and the two sets of right sleeve box guides cooperate with each other to perform left-right direction centering operations on the foam bottom support, thereby completing the centering operation of the foam bottom support.

[0009] Preferably, the belt line is a felt belt line; the felt belt line has the advantages of tensile resistance, cutting resistance and anti-static properties.

[0010] Compared with the prior art, the utility model has the following beneficial effects: when in use, the motor is started, so that the active sprocket drives the driven sprocket to rotate through the chain, so that the driven sprocket drives the belt line assembly to transport the foam base, and the air-conditioning outdoor unit is installed in the foam base. When the foam base passes through the in-place detection photoelectric sensor, the in-place detection photoelectric sensor stops the motor from rotating, so that the foam base stays on the centering waiting area of ​​the belt line assembly, and then the positioning assembly moves the foam base staying on the belt line assembly, so that the foam base moves to the box waiting area, thereby improving convenience and improving the box-putting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0012] Figure 2 It is an axonometric structural diagram of the belt line assembly in the utility model;

[0013] Figure 3 It is a schematic diagram of the structure of the positioning component in the utility model;

[0014] Figure 4 It is a schematic diagram of the axonometric structure of the box centering component in the utility model.

[0015] Markings in the attached figure: 1, frame; 2, belt line assembly; 3, positioning assembly; 4, motor; 5, motor adapter plate; 6, driving sprocket; 7, chain; 8, driven sprocket; 9, in-position detection photoelectric sensor; 10, photoelectric sensor bracket; 21, transmission shaft; 22, driving synchronous wheel; 23, active side support; 24, belt line; 25, driven synchronous wheel; 26, driven shaft; 27, driven side support; 28, support plate; 29, bracket; 31, box body centering assembly; 32, lifting gas Cylinder; 33, synchronizer; 301, positioning plate; 302, slide rail; 303, front and rear positioning cylinder; 304, cylinder push seat; 305, slider connecting plate; 306, left positioning cylinder; 307, right positioning cylinder; 308, left sleeve guide; 309, right sleeve guide; 310, front and rear sleeve guide; 311, rack; 312, cam follower; 313, gear assembly; 314, lifting connecting plate; 315, floating joint; 316, gear mounting plate; 317, pad. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0017] Example 1

[0018] like Figure 1 As shown, a casing positioning mechanism of the utility model comprises a frame 1, a belt line assembly 2, a positioning assembly 3, a motor 4, a motor adapter plate 5, a driving sprocket 6, a chain 7, a driven sprocket 8, an in-position detection photoelectric sensor 9 and a photoelectric sensor bracket 10. The frame 1 is provided with the belt line assembly 2 and the positioning assembly 3 respectively, the motor 4 is installed on the frame 1 through the motor adapter plate 5, the output end of the motor 4 is provided with a driving sprocket 6, the belt line assembly 2 is provided with a driven sprocket 8, the driving sprocket 6 and the driven sprocket 8 are driven by the chain 7, the belt line assembly 2 is provided with a photoelectric sensor bracket 10, and the in-position detection photoelectric sensor 9 is installed on the photoelectric sensor bracket 10;

[0019] like Figure 1 and Figure 2 As shown, the belt line assembly includes a transmission shaft 21, an active synchronous wheel 22, an active side support 23, a belt line 24, a driven synchronous wheel 25, a driven shaft 26, a driven side support 27, a support plate 28 and a bracket 29, two groups of support plates 28 are respectively installed on the frame 1 through the bracket 29, one end of the two groups of support plates 28 are respectively provided with active side supports 23, a group of transmission shafts 21 are rotatably arranged between the two groups of active side supports 23, two groups of active synchronous wheels 22 are installed on the transmission shaft 21, a group of driven side supports 27 are respectively arranged at the other end of the two groups of support plates 28, a group of driven shafts 26 are respectively rotatably arranged in each group of driven side supports 27, a group of driven synchronous wheels 25 are respectively installed on each group of driven shafts 26, each group of active synchronous wheels 22 is respectively driven with a group of driven synchronous wheels 25 through a group of belt lines 24, and a driven sprocket 8 is arranged at one end of the transmission shaft 21;

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, the positioning assembly includes a box centering assembly 31, a lifting cylinder 32 and a synchronizer 33. The lifting cylinder 32 and the synchronizer 33 are arranged on the frame 1, and the box centering assembly 31 is arranged at the top of the lifting cylinder 32.

[0021] In this embodiment, when in use, the motor 4 is started, so that the active sprocket 6 drives the driven sprocket 8 to rotate through the chain 7, and the driven sprocket 8 drives the transmission shaft 21 to rotate, and the transmission shaft 21 further drives the two sets of active synchronous wheels 22 to rotate, and the two sets of active synchronous wheels 22 respectively drive the two sets of driven synchronous wheels 25 to rotate through the corresponding belt lines 24, and the two sets of belt lines 24 cooperate with each other to transport the foam base, and the air-conditioning outdoor unit is installed in the foam base. When the foam base passes through the in-place detection photoelectric sensor 9, the in-place detection photoelectric sensor 9 stops the motor 4 from rotating, so that the foam base stays in the centering waiting area of ​​the belt line assembly 2, and the synchronizer 33 makes the multiple groups of lifting cylinders 32 extend and shorten synchronously. When the lifting cylinder 32 extends, the box body centering assembly 31 performs the centering operation on the foam base on the two groups of belt lines 24 in the front, back, left and right directions and moves it to the box waiting area, thereby improving convenience and improving the box efficiency.

[0022] Example 2

[0023] like Figure 1 As shown, a casing positioning mechanism of the utility model comprises a frame 1, a belt line assembly 2, a positioning assembly 3, a motor 4, a motor adapter plate 5, a driving sprocket 6, a chain 7, a driven sprocket 8, an in-position detection photoelectric sensor 9 and a photoelectric sensor bracket 10. The frame 1 is provided with the belt line assembly 2 and the positioning assembly 3 respectively, the motor 4 is installed on the frame 1 through the motor adapter plate 5, the output end of the motor 4 is provided with a driving sprocket 6, the belt line assembly 2 is provided with a driven sprocket 8, the driving sprocket 6 and the driven sprocket 8 are driven by the chain 7, the belt line assembly 2 is provided with a photoelectric sensor bracket 10, and the in-position detection photoelectric sensor 9 is installed on the photoelectric sensor bracket 10;

[0024] like Figure 1 and Figure 2 As shown, the belt line assembly includes a transmission shaft 21, an active synchronous wheel 22, an active side support 23, a belt line 24, a driven synchronous wheel 25, a driven shaft 26, a driven side support 27, a support plate 28 and a bracket 29, two groups of support plates 28 are respectively installed on the frame 1 through the bracket 29, one end of the two groups of support plates 28 are respectively provided with active side supports 23, a group of transmission shafts 21 are rotatably arranged between the two groups of active side supports 23, two groups of active synchronous wheels 22 are installed on the transmission shaft 21, a group of driven side supports 27 are respectively arranged at the other end of the two groups of support plates 28, a group of driven shafts 26 are respectively rotatably arranged in each group of driven side supports 27, a group of driven synchronous wheels 25 are respectively installed on each group of driven shafts 26, each group of active synchronous wheels 22 is respectively driven with a group of driven synchronous wheels 25 through a group of belt lines 24, and a driven sprocket 8 is arranged at one end of the transmission shaft 21;

[0025] like Figure 1 , Figure 2 and Figure 3As shown, the positioning assembly includes a box centering assembly 31, a lifting cylinder 32 and a synchronizer 33. The lifting cylinder 32 and the synchronizer 33 are arranged on the frame 1, and the top of the lifting cylinder 32 is provided with a box centering assembly 31;

[0026] like Figure 1 , Figure 2 ,and Figure 4 As shown, the box centering assembly includes a positioning plate 301, a slide rail 302, a front and rear positioning cylinder 303, a cylinder push seat 304, a slider connecting plate 305, a left positioning cylinder 306, a right positioning cylinder 307, a left sleeve guide 308, a right sleeve guide 309, a front and rear sleeve guide 310, a rack 311, a cam follower 312, a gear assembly 313, a jacking connecting plate 314, a floating joint 315, a gear mounting plate 316 and a pad 317. A group of jacking connecting plates 314 are respectively arranged on both sides of the positioning plate 301, and each group of jacking connecting plates 314 is arranged on the left side of the positioning plate 301. A group of floating joints 315 are respectively provided on the lifting connection plate 314, and the bottom end of each group of floating joints 315 is respectively connected to the top moving end of a group of lifting cylinders 32. A slide rail 302 is provided on the top of the positioning large plate 301, and a front and rear positioning cylinder 303 is provided on the bottom end of the positioning large plate 301. Two groups of slider connecting plates 305 are slidably installed on the slide rail 302, and a cylinder push seat 304 is provided at the bottom end of a group of slider connecting plates 305. The moving ends of the front and rear positioning cylinders 303 are connected to the cylinder push seat 304. The top of each group of slider connecting plates 305 is respectively A group of left positioning cylinders 306 and right positioning cylinders 307 are provided, and the left positioning cylinders 306 and the right positioning cylinders 307 are symmetrically installed. A group of left sleeve guides 308 are provided at the moving end of each group of left positioning cylinders 306, and a group of right sleeve guides 309 are provided at the moving end of each group of right positioning cylinders 307. A group of front and rear sleeve guides 310 are provided at the top of each group of slider connecting plates 305. The two groups of left positioning cylinders 306 and the two groups of right positioning cylinders 307 are both on the inner sides of the two groups of front and rear sleeve guides 310. A group of racks 311 are respectively provided at the bottom end, a pad 317 is provided at the top of the positioning plate 301, a gear mounting plate 316 is provided at the top of the pad 317, a gear assembly 313 is rotatably provided on the gear mounting plate 316, the two groups of racks 311 are respectively meshed with the gear assembly 313, two groups of cam followers 312 are provided at the top of the positioning plate 301, the two groups of racks 311 are between the two groups of cam followers 312, and the outer ends of the two groups of racks 311 are respectively in rolling contact with one group of cam followers 312; the belt line 24 is a felt belt line.

[0027] In this embodiment, when in use, the motor 4 is started, so that the active sprocket 6 drives the driven sprocket 8 to rotate through the chain 7, and the driven sprocket 8 drives the transmission shaft 21 to rotate, and the transmission shaft 21 further drives the two sets of active synchronous wheels 22 to rotate, and the two sets of active synchronous wheels 22 respectively drive the two sets of driven synchronous wheels 25 to rotate through the corresponding belt lines 24, and the two sets of belt lines 24 cooperate with each other to transport the foam base, and the air-conditioning outdoor unit is installed in the foam base. When the foam base passes through the in-place detection photoelectric sensor 9, the in-place detection photoelectric sensor 9 stops the motor 4 from rotating, so that the foam base stays in the centering waiting area of ​​the belt line assembly 2, and the synchronizer 33 makes the multiple groups of lifting cylinders 32 extend and shorten synchronously, and the lifting cylinders 32 are operated to rise, so that the top ends of the two groups of left casing guides 308, the two groups of right casing guides 309 and the two groups of front and rear casing guides 310 extend to the top of the two groups of belt lines 24, and one group of belt lines 24 is on the left casing guide 30 8 and the front and rear sleeve box guides 310, another group of belt lines 24 are between the right positioning cylinder 307 and the front and rear sleeve box guides 310, and the front and rear sleeve box guides 310 are between the two groups of belt lines 24. Then, the front and rear positioning cylinders 303 are started to shorten, so that a group of slider connecting plates 305 move with the cooperation of the cylinder push seat 304, and the group of slider connecting plates 305 drives the corresponding rack 311 to move, and the group of rack 311 moves another group of rack 311 through the gear assembly 313, so that the two groups of slider connecting plates 305 are mirror-imaged, and further the two groups of front and rear sleeve box guides 310 perform front-to-back centering operations on the foam base supports on the two groups of belt lines 24, and then the two groups of left positioning cylinders 306 and the two groups of right positioning cylinders 307 are operated to shrink synchronously, so that the two groups of left sleeve box guides 308 and the two groups of right sleeve box guides 309 cooperate with each other to perform left-right centering operations on the foam base supports, thereby completing the centering operation of the foam base supports.

[0028] The motor 4, the lifting cylinder 32, the synchronizer 33, the cylinder push seat 304 and the cam follower 312 of the casing positioning mechanism of the utility model are purchased on the market, and the technicians in this industry only need to install and operate them according to the accompanying instruction manual, without the need for the technicians in this field to make creative labor.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A casing positioning mechanism, comprising a frame (1), a belt line assembly (2), a positioning assembly (3), a motor (4), a motor adapter plate (5), a driving sprocket (6), a chain (7), a driven sprocket (8), an in-position detection photoelectric sensor (9) and a photoelectric sensor bracket (10), characterized in that: A belt line assembly (2) and a positioning assembly (3) are respectively arranged on the frame (1); a motor (4) is mounted on the frame (1) via a motor adapter plate (5); a driving sprocket (6) is arranged at the output end of the motor (4); a driven sprocket (8) is arranged on the belt line assembly (2); the driving sprocket (6) and the driven sprocket (8) are driven via a chain (7); a photoelectric sensor bracket (10) is arranged on the belt line assembly (2); and a photoelectric sensor (9) for detecting the position is installed on the photoelectric sensor bracket (10).

2. A casing positioning mechanism as claimed in claim 1, characterized in that: The belt line assembly comprises a transmission shaft (21), an active synchronous wheel (22), an active side support (23), a belt line (24), a driven synchronous wheel (25), a driven shaft (26), a driven side support (27), a support plate (28) and a bracket (29). Two groups of support plates (28) are respectively installed on the frame (1) through the bracket (29). One end of the two groups of support plates (28) is respectively provided with an active side support (23). A group of transmission shafts (21) is rotatably provided between the two groups of active side supports (23). ), two groups of active synchronous wheels (22) are installed on the transmission shaft (21), a group of driven side supports (27) are respectively arranged at the other end of the two groups of support profiles (28), a group of driven shafts (26) are respectively rotatably arranged in each group of driven side supports (27), a group of driven synchronous wheels (25) are respectively installed on each group of driven shafts (26), each group of active synchronous wheels (22) is respectively driven by a group of driven synchronous wheels (25) through a group of belt lines (24), and a driven sprocket (8) is arranged at one end of the transmission shaft (21).

3. A casing positioning mechanism according to claim 1, characterized in that: The positioning assembly comprises a box centering assembly (31), a lifting cylinder (32) and a synchronizer (33). The lifting cylinder (32) and the synchronizer (33) are arranged on the frame (1), and the box centering assembly (31) is arranged at the top end of the lifting cylinder (32).

4. A casing positioning mechanism as claimed in claim 3, characterized in that: The box centering assembly comprises a positioning plate (301), a slide rail (302), a front and rear positioning cylinder (303), a cylinder push seat (304), a slider connecting plate (305), a left positioning cylinder (306), a right positioning cylinder (307), a left sleeve guide (308), a right sleeve guide (309), a front and rear sleeve guide (310), a rack (311), a cam follower (312), a gear assembly (313), a lifting connecting plate (314), a floating joint (315), a gear mounting plate (316) and a pad (317). A set of lifting connecting plates (314) are respectively arranged on both sides of the positioning plate (301). 314), each group of lifting connection plates (314) is respectively provided with a group of floating joints (315), the bottom end of each group of floating joints (315) is respectively connected to the top moving end of a group of lifting cylinders (32), the top of the positioning large plate (301) is provided with a slide rail (302), the bottom end of the positioning large plate (301) is provided with a front and rear positioning cylinder (303), two groups of slider connection plates (305) are slidably installed on the slide rail (302), the bottom end of one group of slider connection plates (305) is provided with a cylinder push seat (304), the moving end of the front and rear positioning cylinder (303) is connected to the cylinder push seat (304), each group of slider connection A group of left positioning cylinders (306) and a group of right positioning cylinders (307) are respectively arranged at the top of the plate (305), and the left positioning cylinders (306) and the right positioning cylinders (307) are symmetrically installed. A group of left sleeve guides (308) are arranged at the moving end of each group of left positioning cylinders (306), and a group of right sleeve guides (309) are respectively arranged at the moving end of each group of right positioning cylinders (307). A group of front and rear sleeve guides (310) are respectively arranged at the top of each group of slider connecting plates (305). The two groups of left positioning cylinders (306) and the two groups of right positioning cylinders (307) are both on the inner side of the two groups of front and rear sleeve guides (310). A group of racks (311) are respectively arranged at the bottom end of the group of slider connecting plates (305), a pad (317) is arranged at the top end of the positioning large plate (301), a gear mounting plate (316) is arranged at the top end of the pad (317), a gear assembly (313) is rotatably arranged on the gear mounting plate (316), two groups of racks (311) are respectively meshed with the gear assembly (313), two groups of cam followers (312) are arranged at the top end of the positioning large plate (301), the two groups of racks (311) are between the two groups of cam followers (312), and the outer ends of the two groups of racks (311) are respectively in rolling contact with one group of cam followers (312).

5. A casing positioning mechanism as claimed in claim 2, characterized in that: The belt line (24) is a felt belt line.

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