Carburetor shell blank producing and machining equipment

By adopting a combined structure of clamping components, fixing components and adjusting components in the carburetor shell blank production and processing equipment, ensuring that the processing parts are fixed around them, and the stability is enhanced through the movable rod and the limiting frame, the existing equipment cannot be completely eliminated. The problem of fixing machining parts improves the processing quality.

CN222221885UActive Publication Date: 2024-12-24RUIAN RUIWEI AUTO PARTS FACTORY
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Patent Information

Application Number
CN202421068650.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-16
Publication Date
2024-12-24
Estimated Expiration
2034-05-16

AI Technical Summary

Technical Problem

The existing carburetor shell blank production and processing equipment cannot fully fix the surroundings of the processed parts when clamping the processed parts, resulting in the processed parts being easily shaken during the process and affecting the processing quality.

Method used

Using a combined structure of clamping components, fixing components and adjusting components, the sliding, rotating and removable structure ensures that the machining parts are fixed around them, and the equipment stability is enhanced using a movable rod and a limiting frame, and the removable barrier is used to enhance the stability of the equipment. The plate and nut structures are adjusted according to the size of the workpiece and the size of the port.

Benefits of technology

Effectively prevent the machining parts from shaking due to vibration during processing, enhance the stability of the equipment, and facilitate adaptation according to different machining parts sizes and port sizes, improving the processing quality.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of machining equipment, and discloses carburetor shell blank producing and machining equipment which is characterized in that rotating shafts are rotationally connected to the inner walls of the two sides of a mounting frame, movable rods are slidably connected to the outer walls of the rotating shafts, a fixed plate and a swing rod are welded to the two ends of each movable rod respectively, and a sliding rod penetrates through the inner wall of each fixed plate; a clamping block is welded to the bottom end of the sliding rod, a nut is in threaded connection with the outer wall of the sliding rod, and the fixing plate is located between the nut and the clamping block. Through the arrangement of the movable rod and the limiting frame, the swing rod is pulled upwards, the movable rod is driven to rotate forwards on the rotating shaft, the fixing plate and the connecting rod are driven to rotate downwards, the connecting rod is rotated to the top end of the middle of a machined part to clamp the top of the machined part, and then the swing rod on the limiting frame is held by hand to rotate backwards; the limiting frame is driven to rotate backwards on the connecting rod, and the limiting frame is rotated to the swing rod of the movable rod for limiting, so that the connecting rod cannot be driven to rotate upwards when the machined part vibrates in the machining process.
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Description

Technical Field

[0001] The utility model relates to the technical field of processing equipment, in particular to carburetor shell blank production and processing equipment. Background Art

[0002] A carburetor is a mechanical device that mixes a certain proportion of gasoline and air under the vacuum generated by the working engine. As a precision mechanical device, the carburetor uses the kinetic energy of the inhaled air flow to atomize the gasoline. Its important role in the engine can be called the "heart" of the engine. Its complete device should include a starting device, an idle device, a medium load device, a full load device, and an acceleration device. The carburetor will automatically mix the corresponding concentration and output the corresponding amount of mixed gas according to the different working conditions of the engine. In order to make the mixed gas mixed more evenly, the carburetor also has the effect of atomizing the fuel for the normal operation of the machine.

[0003] The application number is CN202123409858.8, which discloses a carburetor shell blank production and processing equipment, which relates to the technical field of carburetor processing equipment, including a bottom plate, a barrel body is fixedly installed on the top of the bottom plate, a fixed platform is fixedly installed on the top of the barrel body, and a processing cabin is fixedly installed above the fixed platform. The carburetor shell blank production and processing equipment, through the coordinated use of the fixed plate and the adjusting bolt and the clamping block and the guide column, makes the sealing door of the carburetor shell blank production and processing equipment in the open state, the tray extends to the outside of the processing cabin, the staff can rotate the adjusting bolt to drive the clamping block to move along the wire of the guide column, and then place the shell to be processed between the two clamping blocks, rotate the adjusting bolt, and the adjusting bolt can push the two clamping blocks closer to each other under the action of its external thread and the fixed plate until the clamping block clamps the shell, so that the shell is suspended above the tray.

[0004] The above document discloses a carburetor housing blank production and processing equipment with the following defects: when the equipment clamps and fixes the workpiece, the clamping assembly clamps the workpiece on both sides. When the workpiece is being processed, it will be affected and driven by the processing assembly. At this time, the suspended workpiece can easily swing inside the clamping assembly, which greatly reduces the quality of the workpiece after processing.

[0005] It can be seen from this that the existing carburetor housing blank production and processing equipment does not have the function of completely fixing the processed part on all sides, and it is necessary to improve the existing deficiencies and provide a function that can completely fix the processed part on all sides. Utility Model Content

[0006] The utility model aims to provide a carburetor housing blank production and processing equipment to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0008] The utility model is a carburetor shell blank production and processing equipment, comprising a clamping component, a fixing component, an adjusting component and a processing part, the fixing component and the adjusting component are threadedly connected to the upper surface of the clamping component, the processing part is slidably connected to the inner wall of the clamping component, the clamping component comprises a base, a connecting plate is welded on the upper surface of the base, a mounting frame on the upper surface of the connecting plate, bolts are threadedly connected on the inner walls of both sides of the mounting frame, the bolts penetrate the mounting frame and extend to the inner wall of the connecting plate, a rotating shaft is rotatably connected on the inner walls of both sides of the mounting frame, a movable rod is slidably connected on the outer wall of the rotating shaft, a fixing plate and a swing rod are respectively welded on both ends of the movable rod, a sliding rod penetrates the inner wall of the fixing plate, a clamping block is welded on the bottom end of the sliding rod, a nut is threadedly connected on the outer wall of the sliding rod, and the fixing plate is located between the nut and the clamping block. The purpose of such a setting is that during the use of the equipment, the workpiece is connected in the slide groove by sliding, so that the mounting block fixes it on all sides, and the mounting block is set with a detachable structure. The corresponding mounting block can be replaced according to the size of the workpiece. The baffle blocks the embedding path of the workpiece, and the limit plate limits the baffle. The plug rod connecting the limit plate and the baffle is set as a detachable structure, which is convenient for replacement according to the port size of the workpiece. The fastening ring and the nut cooperate to fix the plug rod and the baffle on the base and the connecting plate, and the block on the rotating rod is rotated to the top of the workpiece to block the active path of the top end of the workpiece. The connecting frame is made into a detachable structure to facilitate the replacement of size. The fastening ring and the nut cooperate to fix the insertion rod and the connecting frame to the base and the connecting plate. The swing rod on the movable rod is held and pulled upward, and the movable rod is driven to rotate forward on the rotating shaft, and the fixed plate and the connecting rod are driven to rotate downward. The connecting rod is rotated to the top of the middle part of the workpiece to clamp the top of the workpiece. Then the swing rod on the limit frame is held and rotated backward. The limit frame is driven to rotate backward on the connecting rod, and the limit frame is rotated to the swing rod of the movable rod for limiting, so that the connecting rod will not be driven to rotate upward when the workpiece being processed vibrates, thereby enhancing the stability of the equipment.

[0009] Furthermore, connecting rods are inserted into the inner walls of both sides of the mounting frame, and the outer wall of the connecting rod is slidably connected to the limit frame, a swing rod is welded to the top of the limit frame, a sleeve block is sleeved on the outer side of the connecting rod close to the limit frame, and a latch is inserted into the inner wall of the connecting rod close to the sleeve block. The purpose of this arrangement is that during the use of the device, the limit frame is driven to rotate backward on the connecting rod, and the limit frame is rotated to the swing rod of the movable rod for limiting, so that the connecting rod will not be driven to rotate upward when the workpiece being processed vibrates, thereby enhancing the stability of the device.

[0010] Furthermore, a mounting block is provided on the upper surface of the base, and bolts are threadedly connected on the inner walls around the mounting block, and the bolts penetrate the mounting block and extend to the inner wall of the base, and a slide groove is provided on the top outer wall of the mounting block, and the processing piece is slidably connected to the inner wall of the slide groove. The purpose of this arrangement is that during the use of the device, the processing piece is connected to the slide groove by sliding, and the mounting block fixes it around, and the mounting block is provided with a detachable structure, and the corresponding mounting block can be replaced according to the size of the processing piece.

[0011] Furthermore, a plug rod is inserted into the base and the connecting plate, a fastening ring is sleeved on the outside of the plug rod near the base, and a nut is threadedly connected on the outer wall of the plug rod near the fastening ring. The purpose of this arrangement is that during the use of the device, the limit plate limits the baffle plate, and the plug rod connecting the limit plate and the baffle plate is set as a detachable structure, which is convenient for replacement according to the port size of the workpiece, and the fastening ring and the nut cooperate to fix the plug rod and the baffle plate on the base and the connecting plate.

[0012] Furthermore, a baffle is threadedly connected to the outer wall of the plug rod, the connecting plate is against the baffle, and a limit plate is provided on the upper surface of the baffle, the limit plate is threadedly connected to the inner wall of the connecting plate by bolts, and the limit plates are located on the outer walls of both sides of the baffle. The purpose of this arrangement is that during the use of the device, the baffle blocks the insertion path of the workpiece, and the plug rod connected by the limit plate and the baffle is set as a detachable structure, which is convenient for replacement according to the port size of the workpiece.

[0013] Furthermore, a plug rod is passed through the interior of the base and the connecting plate near the limit plate, a fastening ring and a nut are provided on the outer wall of the bottom end of the plug rod, the fastening ring and the nut are located on the lower surface of the base, a connecting frame is welded to the top end of the plug rod, a rotating rod is plugged into the inner walls on both sides of the connecting frame, a stopper is rotatably connected to the outer wall of the rotating rod, and a latch is plugged into the outer wall of the rotating rod near the connecting frame. The purpose of this arrangement is that during the use of the device, the stopper on the rotating rod is rotated to the top of the workpiece to block the moving path of the top end of the workpiece, the stopper and the connecting frame are made into a detachable structure to facilitate the size change, and the fastening ring and the nut cooperate to fix the plug rod and the connecting frame to the base and the connecting plate.

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

[0015] (1) The utility model provides a movable rod and a limit frame. The user holds the swing rod on the movable rod and pulls it upward. The movable rod is driven to rotate forward on the rotating shaft. The fixed plate and the connecting rod are driven to rotate downward. The connecting rod is rotated to the top of the middle of the workpiece to clamp the top of the workpiece. The user holds the swing rod on the limit frame and rotates it backward. The limit frame is driven to rotate backward on the connecting rod. The limit frame is rotated to the swing rod of the movable rod to limit the connection. The connecting rod will not be driven to rotate upward when the workpiece is vibrated during processing, thereby enhancing the stability of the equipment.

[0016] (2) The utility model provides a baffle plate and a nut to block the embedding path of the workpiece, and the insertion rod connecting the limit plate and the baffle plate is provided as a detachable structure, which is convenient for replacement according to the port size of the workpiece. The fastening ring and the nut cooperate to fix the insertion rod and the baffle plate on the base and the connecting plate.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the partially split structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the partially split structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the split structure of the adjustment component of the utility model;

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] In the figure: 1. Clamping assembly; 100. Bolt; 101. Base; 102. Connecting plate; 103. Mounting block; 104. Slide; 2. Fixing assembly; 201. Limiting plate; 202. Inserting rod; 203. Baffle; 204. Fastening ring; 205. Nut; 206. Connecting frame; 207. Rotating rod; 208. Block; 209. Latch; 3. Adjusting assembly; 302. Mounting frame; 303. Rotating shaft; 304. Movable rod; 305. Fixing plate; 306. Slide; 307. Clamping block; 308. Limiting frame; 309. Connecting rod; 310. Bushing; 311. Rocker; 4. Workpiece. DETAILED DESCRIPTION

[0025] 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 in 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.

[0026] See also Figure 1 - Figure 4As shown, the utility model is a carburetor housing blank production and processing equipment, including a clamping component 1, a fixing component 2, an adjusting component 3 and a processing piece 4, the fixing component 2 and the adjusting component 3 are threadedly connected to the upper surface of the clamping component 1, the processing piece 4 is slidably connected to the inner wall of the clamping component 1, the clamping component 1 includes a base 101, a connecting plate 102 is welded to the upper surface of the base 101, a mounting frame 302 is mounted on the upper surface of the connecting plate 102, and bolts 100 are threadedly connected to the inner walls of both sides of the mounting frame 302, and the bolts 100 penetrate The mounting frame 302 extends to the inner wall of the connecting plate 102, and the inner walls on both sides of the mounting frame 302 are rotatably connected with a rotating shaft 303, and the outer wall of the rotating shaft 303 is slidably connected with a movable rod 304, and the two ends of the movable rod 304 are respectively welded with a fixed plate 305 and a rocker rod 311, and the inner wall of the fixed plate 305 is penetrated by a sliding rod 306, and the bottom end of the sliding rod 306 is welded with a clamping block 307, and the outer wall of the sliding rod 306 is threadedly connected with a nut 205, and the fixed plate 305 is located between the nut 205 and the clamping block 307. The purpose of such arrangement is that during the use of the equipment, the workpiece 4 is connected in the slide groove 104 by sliding, so that the mounting block 103 fixes it on all sides, and the mounting block 103 is provided with a detachable structure, and the corresponding mounting block 103 can be replaced according to the size of the workpiece 4. The baffle 203 blocks the embedding path of the workpiece 4, and the limit plate 201 limits the baffle 203. The plug rod 202 connected by the limit plate 201 and the baffle 203 is set to a detachable structure, which is convenient for replacement according to the port size of the workpiece 4. The fastening ring 204 and the nut 205 cooperate to fix the plug rod 202 and the baffle 203 on the base 101 and the connecting plate 102, and the block 208 on the rotating rod 207 is rotated to the top of the workpiece 4 to block the active path of the top of one end of the workpiece 4. 206 is made into a detachable structure for easy size replacement. The fastening ring 204 and the nut 205 cooperate to fix the insertion rod 202 and the connecting frame 206 on the base 101 and the connecting plate 102. The swing rod 311 on the movable rod 304 is held and pulled upward, and the movable rod 304 is driven to rotate forward on the rotating shaft 303, and the fixed plate 305 and the connecting rod 309 are driven to rotate downward, and the connecting rod 309 is rotated to the middle top of the workpiece 4 to clamp the top of the workpiece 4. Then the swing rod 311 on the limit frame 308 is held and rotated backward. The limit frame 308 is driven to rotate backward on the connecting rod 309, and the limit frame 308 is rotated to the swing rod 311 of the movable rod 304 for limiting, so that the connecting rod 309 will not be driven to rotate upward when the workpiece 4 being processed vibrates, thereby enhancing the stability of the equipment.

[0027] Connecting rods 309 are inserted into the inner walls of both sides of the mounting frame 302, and the outer wall of the connecting rod 309 is slidably connected to the limiting frame 308, and the top of the limiting frame 308 is welded with a swing rod 311. The outer part of the connecting rod 309 near the limiting frame 308 is sleeved with a sleeve block 310, and the inner wall of the connecting rod 309 near the sleeve block 310 is inserted with a latch 209. The purpose of this arrangement is that during the use of the device, the limiting frame 308 is driven to rotate backward on the connecting rod 309, and the limiting frame 308 is rotated to the swing rod 311 of the movable rod 304 for limiting, so that the connecting rod 309 will not be driven to rotate upward when the workpiece 4 being processed vibrates, thereby enhancing the stability of the device.

[0028] The upper surface of the base 101 is provided with a mounting block 103, and bolts 100 are threadedly connected on the inner walls around the mounting block 103. The bolts 100 penetrate the mounting block 103 and extend to the inner wall of the base 101. A slide groove 104 is provided on the top outer wall of the mounting block 103, and the processing piece 4 is slidably connected to the inner wall of the slide groove 104. The purpose of this arrangement is that during the use of the device, the processing piece 4 is slidably connected in the slide groove 104, so that the mounting block 103 fixes it around, and the mounting block 103 is provided with a detachable structure, and the corresponding mounting block 103 can be replaced according to the size of the processing piece 4.

[0029] The base 101 and the connecting plate 102 are penetrated by the insert rod 202, and the insert rod 202 is sleeved with a fastening ring 204 near the base 101. The outer wall of the insert rod 202 near the fastening ring 204 is threadedly connected with a nut 205. The purpose of this arrangement is that during the use of the device, the limit plate 201 limits the baffle 203, and the insert rod 202 connected by the limit plate 201 and the baffle 203 is set to a detachable structure, which is convenient for replacement according to the port size of the workpiece 4. The fastening ring 204 and the nut 205 cooperate to fix the insert rod 202 and the baffle 203 on the base 101 and the connecting plate 102.

[0030] The outer wall of the plug rod 202 is threadedly connected with a baffle 203, and the connecting plate 102 is close to the upper surface of the baffle 203. The baffle 201 is threadedly connected to the inner wall of the connecting plate 102 by bolts 100, and the baffle 201 is located on the outer walls of both sides of the baffle 203. The purpose of this arrangement is that during the use of the device, the baffle 203 blocks the embedding path of the workpiece 4, and the plug rod 202 connected by the limit plate 201 and the baffle 203 is set as a detachable structure, which is convenient for replacement according to the port size of the workpiece 4.

[0031] An insertion rod 202 penetrates the interior of the base 101 and the connecting plate 102 near the limit plate 201, and a fastening ring 204 and a nut 205 are provided on the outer wall of the bottom end of the insertion rod 202. The fastening ring 204 and the nut 205 are located on the lower surface of the base 101. A connecting frame 206 is welded to the top end of the insertion rod 202, and rotating rods 207 are inserted on the inner walls on both sides of the connecting frame 206. A stopper 208 is rotatably connected to the outer wall of the rotating rod 207, and a pin 209 is inserted on the outer wall of the rotating rod 207 close to the connecting frame 206. The purpose of this arrangement is that during the use of the equipment, the stopper 208 on the rotating rod 207 is rotated to the top of the workpiece 4 to block the movable path of the top end of the workpiece 4, and the stopper 208 and the connecting frame 206 are made into a detachable structure to facilitate the size replacement, and the fastening ring 204 and the nut 205 cooperate to fix the insertion rod 202 and the connecting frame 206 on the base 101 and the connecting plate 102.

[0032] When in use, during the use of the device, the workpiece 4 is connected in the slide groove 104 by sliding, so that the mounting block 103 fixes it on all sides, and the mounting block 103 is set to a detachable structure. The corresponding mounting block 103 can be replaced according to the size of the workpiece 4. The baffle 203 blocks the embedding path of the workpiece 4, and the limit plate 201 limits the baffle 203. The plug rod 202 connected by the limit plate 201 and the baffle 203 is set to a detachable structure, which is convenient for replacement according to the port size of the workpiece 4. The fastening ring 204 and the nut 205 cooperate to fix the plug rod 202 and the baffle 203 on the base 101 and the connecting plate 102, and the block 208 on the rotating rod 207 is rotated to the top of the workpiece 4 to block the active path of the top of one end of the workpiece 4. The block 208 and the connecting frame 206 are connected. The detachable structure is convenient for changing the size. The fastening ring 204 and the nut 205 cooperate to fix the insertion rod 202 and the connecting frame 206 on the base 101 and the connecting plate 102. The swing rod 311 on the movable rod 304 is held and pulled upward, and the movable rod 304 is driven to rotate forward on the rotating shaft 303, and the fixed plate 305 and the connecting rod 309 are driven to rotate downward, and the connecting rod 309 is rotated to the middle top of the workpiece 4 to clamp the top of the workpiece 4. Then the swing rod 311 on the limit frame 308 is held and rotated backward, and the limit frame 308 is driven to rotate backward on the connecting rod 309, and the limit frame 308 is rotated to the swing rod 311 of the movable rod 304 for limiting, so that the connecting rod 309 will not be driven to rotate upward when the workpiece 4 being processed vibrates, thereby enhancing the stability of the equipment.

[0033] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A carburetor housing blank production and processing equipment, comprising a clamping component (1), a fixing component (2), an adjustment component (3) and a processing part (4), characterized in that: The fixing component (2) and the adjusting component (3) are threadedly connected to the upper surface of the clamping component (1); the processing component (4) is slidably connected to the inner wall of the clamping component (1); the clamping component (1) comprises a base (101); a connecting plate (102) is welded to the upper surface of the base (101); a mounting frame (302) is connected to the upper surface of the connecting plate (102); bolts (100) are threadedly connected to the inner walls of both sides of the mounting frame (302); the bolts (100) penetrate the mounting frame (302) and extend to the inner wall of the connecting plate (102); A rotating shaft (303) is rotatably connected to the inner walls of both sides of the mounting frame (302), a movable rod (304) is slidably connected to the outer wall of the rotating shaft (303), a fixed plate (305) and a swing rod (311) are respectively welded to the two ends of the movable rod (304), a sliding rod (306) passes through the inner wall of the fixed plate (305), a clamping block (307) is welded to the bottom end of the sliding rod (306), a nut (205) is threadedly connected to the outer wall of the sliding rod (306), and the fixed plate (305) is located between the nut (205) and the clamping block (307).

2. The carburetor housing blank production and processing equipment according to claim 1 is characterized in that: Connecting rods (309) are inserted into the inner walls on both sides of the mounting frame (302); a limiting frame (308) is slidably connected to the outer wall of the connecting rod (309); a swing rod (311) is welded to the top of the limiting frame (308); a sleeve block (310) is sleeved on the outside of the connecting rod (309) close to the limiting frame (308); and a latch (209) is inserted into the inner wall of the connecting rod (309) close to the sleeve block (310).

3. The carburetor housing blank production and processing equipment according to claim 1 is characterized by: A mounting block (103) is provided on the upper surface of the base (101); bolts (100) are threadedly connected to the inner walls around the mounting block (103); the bolts (100) penetrate the mounting block (103) and extend to the inner wall of the base (101); a slide groove (104) is provided on the top outer wall of the mounting block (103); and the processing part (4) is slidably connected to the inner wall of the slide groove (104).

4. The carburetor housing blank production and processing equipment according to claim 1 is characterized by: An insertion rod (202) penetrates the interior of the base (101) and the connecting plate (102); a fastening ring (204) is sleeved on the outside of the insertion rod (202) close to the base (101); and a nut (205) is threadedly connected on the outer wall of the insertion rod (202) close to the fastening ring (204).

5. The carburetor housing blank production and processing equipment according to claim 4 is characterized in that: A baffle (203) is threadedly connected to the outer wall of the insertion rod (202), the connection plate (102) is close to the baffle (203), and a limit plate (201) is provided on the upper surface of the baffle (203). The limit plate (201) is threadedly connected to the inner wall of the connection plate (102) via bolts (100), and the limit plate (201) is located on the outer walls of both sides of the baffle (203).

6. The carburetor housing blank production and processing equipment according to claim 5, characterized in that: An insertion rod (202) penetrates the interior of the base (101) and the connecting plate (102) near the limiting plate (201); a fastening ring (204) and a nut (205) are provided on the outer wall of the bottom end of the insertion rod (202); the fastening ring (204) and the nut (205) are located on the lower surface of the base (101); a connecting frame (206) is welded to the top end of the insertion rod (202); rotating rods (207) are plugged into the inner walls on both sides of the connecting frame (206); a stopper (208) is rotatably connected to the outer wall of the rotating rod (207); and a latch (209) is plugged into the outer wall of the rotating rod (207) on one side close to the connecting frame (206).