Telescopic rod assembling equipment

Abstract

The utility model discloses telescopic rod assembling equipment, which belongs to the technical field of telescopic rod assembling and is characterized in that an assembling mechanism is mounted between a conveying component and a conveying belt, a bolt feeder is positioned at one end close to the conveying component, and a plug mounting piece is mounted on one side of the bolt feeder; the plug jacking piece is installed on one side of the plug installation piece, the piece clamping piece is installed at the end of the plug jacking piece, and the assembly transferring piece is arranged between the conveying assembly and the conveying belt. The assembly transfer part is used for conveying the materials on the conveying assembly to the bolt feeder and transferring the machined telescopic rod assembly below the bolt feeder to the plug mounting part at the same time, and meanwhile the machined materials below the plug mounting part are transferred to the position between the plug jacking parts. The plug jacking piece and the piece clamping piece are matched to assemble the telescopic rod assembly together, and after assembly is completed, the matched assembly transferring piece is transferred to a conveying belt.

Description

Technical Field

[0001] The utility model relates to the field of telescopic rod assembly, in particular to a telescopic rod assembly device. Background Art

[0002] In the assembly and production of telescopic rods, plugs and other parts need to be installed on the ends of the telescopic rods. If these parts are installed manually, the production efficiency is greatly reduced. At the same time, if the plugs are not installed properly manually, it is easy to produce unqualified products, affect the sales path, and cause serious losses to the manufacturer. How to invent a telescopic rod assembly device to improve these problems has become a problem that needs to be solved urgently by technicians in this field. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides a telescopic rod assembly device, which aims to improve the problems of low efficiency of manual installation and easy production of unqualified products.

[0004] The utility model is implemented as follows: a telescopic rod assembly device, including a conveyor belt for transmitting telescopic rod parts, a plug upper material piece for feeding the telescopic rod parts, a card upper material piece and a bolt feeder for assembling the telescopic rod parts, and also includes

[0005] A feeding mechanism, the feeding mechanism comprising a transmission assembly and a telescopic rod assembly;

[0006] An assembly mechanism is installed between the transmission component and the conveyor belt, the assembly mechanism includes a plug mounting member, a plug tightening member and a sheet clamping member, the bolt feeder is located at one end close to the transmission component, the plug mounting member is installed on one side of the bolt feeder, the plug tightening member is installed on one side of the plug mounting member, and the sheet clamping member is installed on the end of the plug tightening member. A component transfer member is provided between the transmission component and the conveyor belt, and the component transfer member is provided corresponding to the bolt feeder, the plug mounting member, the plug tightening member and the sheet clamping member.

[0007] In a preferred technical solution of the utility model, a supporting assembly is provided at the bottom of the conveying assembly, limiting protrusions are equally provided on the conveying belt of the conveying assembly, and the telescopic rod assembly is placed between two limiting protrusions.

[0008] In a preferred technical solution of the utility model, the telescopic rod assembly includes a rod tube, the end of the rod tube is clamped with a plug, the other end of the rod tube is internally provided with a card, and the surface of the rod tube is threadedly installed with a bolt.

[0009] In a preferred technical solution of the present invention, the plug mounting member includes a first pushing cylinder, a first pushing block is fixedly connected to the end of the first pushing cylinder, a first finger cylinder is arranged above one side of the first pushing cylinder, a translation cylinder is installed above the first finger cylinder, and a first downward moving cylinder is installed on the back of the translation cylinder.

[0010] In a preferred technical solution of the present utility model, the translation cylinder is fixedly installed above one side of the first pushing cylinder through a mounting plate, the first downward moving cylinder is limitedly slidably installed on the fixing plate and is transmission-connected to the translation cylinder, two groups of first finger cylinders are installed at the bottom of the first downward moving cylinder through a plate, and two groups of first push blocks are correspondingly arranged at the bottom of the two groups of the first finger cylinders, and the two groups of the first push blocks are fixedly connected to the output end of the first pushing cylinder.

[0011] In a preferred technical solution of the present invention, the plug tightening member includes a clamping cylinder and a second pushing cylinder, the second pushing cylinder is installed on one side of the first pushing cylinder, the output end of the second pushing cylinder is fixedly connected to a second pushing block, the clamping cylinder is arranged on the opposite side of the second pushing cylinder, and the second pushing cylinder and the second pushing block are each provided with two groups, and the two groups are arranged in a close fit.

[0012] In a preferred technical solution of the present invention, the sheet clamping member includes a second finger cylinder and a third finger cylinder, a second downward moving cylinder is arranged above the second finger cylinder, the back of the second downward moving cylinder is limitedly slidably connected to the first slide, one side of the second downward moving cylinder is transmission-connected to the first displacement cylinder, and the third finger cylinder is located on the back of the clamping cylinder and is arranged corresponding to the second pushing block.

[0013] In a preferred technical solution of the present invention, support rods are connected to the lower ends of the first slide, the second downward cylinder is limitedly slidably connected to the first slide, one side of the first displacement cylinder is fixedly connected to the mounting plate of the first slide, the output end of the first displacement cylinder is transmission-connected to the second downward cylinder, the third finger cylinder is provided with two groups, and the two groups are correspondingly installed at the bottom of the second downward cylinder, the third finger cylinder is clamped with the card, and a telescopic push rod is connected to the back of the third finger cylinder.

[0014] In a preferred technical solution of the present utility model, the component transport part includes a connecting rod, a displacement double-slot card and a mounting seat, the connecting rod is respectively fixedly connected to both sides of the mounting seat, the displacement double-slot card is installed at equal intervals above the connecting rod, the displacement double-slot card is equally divided into four groups, the bottom of the mounting seat is fixedly connected to an upward cylinder, the upward cylinder is limitedly slidably connected to a second slide, and one side of the mounting seat is fixedly connected to a second displacement cylinder.

[0015] In a preferred technical solution of the present invention, the displacement double-slot card at one end of the connecting rod is arranged corresponding to the rod tube above the conveying assembly, the displacement double-slot card at the tail of the connecting rod is arranged corresponding to the conveyor belt, and fixed double-slot cards are respectively arranged on both sides of the displacement double-slot card, and the fixed double-slot cards are respectively arranged corresponding to the first pushing block and the second pushing block, and the displacement double-slot card and the fixed double-slot card are respectively located at the two ends of the rod tube.

[0016] The beneficial effect of the utility model is that the utility model obtains a telescopic rod assembly device through the above design. When in use, the second displacement cylinder cooperates with the second slide to drive the mounting seat close to the end of the transmission assembly. At this time, the upward cylinder drives the mounting seat to rise, so that the mounting seat drives multiple groups of displacement double-slot cards to move up at the same time. The displacement double-slot card moves up to lift the rod tube on the transmission assembly and the rod tube above the fixed double-slot card. At this time, the second displacement cylinder retracts, driving the rod tube to displace, and the processed rod tube above the transmission assembly is placed above the first group of fixed double-slot cards. At this time, the bolt feeder processes the rod tube, and the rod tube processed by the bolt feeder moves to the fixed double-slot card between the plug mounting parts. At this time, the material parts on the plug are transmitted to the plug directly below the first finger cylinder through vibration. At this time, the first finger cylinder is driven downward by the first downward cylinder to clamp the plug, and the translation cylinder drives the first downward cylinder to displace to one end of the rod tube above the fixed double-slot card, and the first downward cylinder drives the first The finger cylinder moves down and places the plug on the end of the rod tube. At this time, the first pushing cylinder is controlled to drive the first pushing block to insert the plug into the rod tube. After the plug installation part is processed, the assembly transfer part will transport the processed one to the fixed double-slot card between the plug pressing parts. At this time, the clamping cylinder moves down to clamp the two groups of rod tubes. At the same time, the second pushing cylinder pushes the second pushing block to make the plug completely penetrate into the rod tube. At the same time, the second finger cylinder clamps the card transmitted by the card upper material, and is driven by the second downward cylinder and the first displacement cylinder to be located directly above the third finger cylinder, and the card is placed in the third finger cylinder. At this time, the push rod pushes the card through the positioning plate on one side of the clamping cylinder and extends into the other end of the rod tube. The assembly is completed, and the assembly transfer part transports the telescopic rod assembly assembled with the plug pressing part and the sheet clamping part to the conveyor belt. The conveyor belt transports the telescopic rod assembly to a suitable position, which improves the efficiency of installation and production, reduces the occurrence of unqualified products, and reduces the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of one side structure provided by an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the structure of another side provided for an embodiment of the utility model;

[0020] Figure 3 A schematic diagram of a partial structure of a feeding mechanism provided in an embodiment of the utility model;

[0021] Figure 4 A schematic diagram of the structure of a plug tightening member provided in an embodiment of the utility model;

[0022] Figure 5 A schematic diagram of the structure of a sheet clamping member provided in an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of the structure of a component transport member provided in an embodiment of the utility model.

[0024] In the figure: 100-feeding mechanism; 110-support assembly; 120-transmission assembly; 130-telescopic rod assembly; 140-conveyor belt; 131-rod tube; 132-bolt; 133-plug; 134-card; 200-assembly mechanism; 210-bolt feeder; 220-plug mounting member; 221-first tightening cylinder; 222-first push block; 223-first finger cylinder; 224-first downward cylinder; 225-translation cylinder; 230-plug tightening member; 231-pressing cylinder; 232-second tightening cylinder; 2 33-second pushing block; 240-sheet clamping piece; 241-second finger cylinder; 242-third finger cylinder; 243-support rod; 244-first slide; 245-downward cylinder; 246-first displacement cylinder; 250-component transport part; 251-connecting rod; 252-displacement double-slot card; 253-suction cup; 254-mounting seat; 255-upward cylinder; 256-second slide; 257-second displacement cylinder; 258-fixed double-slot card; 300-feeding mechanism; 310-plug upper material part; 320-card feeding part. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations 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 and Figure 2 The utility model provides a technical solution: a telescopic rod assembly device, including a conveyor belt 140 for transmitting telescopic rod parts, a plug upper material 310 and a card upper material 320 for feeding the telescopic rod parts, and a bolt feeder 210 for assembling the telescopic rod parts, and also includes

[0027] The feeding mechanism 100 includes a transmission assembly 120 and a telescopic rod assembly 130;

[0028] The assembly mechanism 200 is installed between the conveying component 120 and the conveyor belt 140. The assembly mechanism 200 includes a plug mounting member 220, a plug top fastening member 230 and a sheet clamping member 240. The bolt feeder 210 is located at one end close to the conveying component 120. The plug mounting member 220 is installed on one side of the bolt feeder 210. The plug top fastening member 230 is installed on one side of the plug mounting member 220. The sheet clamping member 240 is installed on the end of the plug top fastening member 230. A component transport member 250 is provided between the conveying component 120 and the conveyor belt 140. The component transport member 250 is connected to the bolt feeder 210. The bolt feeder 210, the plug mounting part 220, the plug top fastening part 230 and the sheet clamping part 240 are correspondingly arranged, and the component transfer part 250 is used to simultaneously transfer the material on the conveying component 120 to the bolt feeder 210 and transfer the telescopic rod component 130 processed below the bolt feeder 210 to the plug mounting part 220, and at the same time transfer the processed material below the plug mounting part 220 to between the plug top fastening part 230, the plug top fastening part 230 cooperates with the sheet clamping part 240 to assemble the telescopic rod assembly 130, and after the assembly is completed, it is transferred to the conveyor belt 140 with the component transfer part 250.

[0029] See also Figure 3 and Figure 5The bottom of the conveying assembly 120 is provided with a support assembly 110, and the conveying belt of the conveying assembly 120 is evenly provided with limit protrusions, and the telescopic rod assembly 130 is placed between two limit protrusions, and the protrusions are convenient for separating multiple telescopic rod assemblies 130 to facilitate the transportation of the assembly transporter 250. The telescopic rod assembly 130 includes a rod tube 131, and a plug 133 is clamped at the end of the rod tube 131. A card 134 is arranged inside the other end of the rod tube 131, and a bolt 132 is threadedly installed on the surface of the rod tube 131.

[0030] See also Figures 4 to 6 The plug mounting member 220 includes a first pushing cylinder 221, the end of which is fixedly connected to a first pushing block 222, a first finger cylinder 223 is arranged above one side of the first pushing cylinder 221, a translation cylinder 225 is installed above the first finger cylinder 223, and a first downward cylinder 224 is installed on the back of the translation cylinder 225. The translation cylinder 225 is fixedly installed above one side of the first pushing cylinder 221 through a mounting plate, the first downward cylinder 224 is limitedly slidably installed on the fixing plate and is transmission-connected to the translation cylinder 225, two groups of first finger cylinders 223 are installed at the bottom of the first downward cylinder 224 through a plate, and two groups of first push blocks 222 are correspondingly arranged at the bottom of the two groups of first finger cylinders 223, and the two groups of first push blocks 222 are fixedly connected to the output end of the first pushing cylinder 221, and a rotating disk is arranged above the first finger cylinder 223, which is convenient for driving the plug 133 to rotate through the first finger cylinder 223, and is placed at the end of the rod tube 131 after adjusting the angle.

[0031] The plug tightening member 230 includes a clamping cylinder 231 and a second pushing cylinder 232. The second pushing cylinder 232 is installed on one side of the first pushing cylinder 221. The output end of the second pushing cylinder 232 is fixedly connected with a second pushing block 233. The clamping cylinder 231 is arranged on the opposite side of the second pushing cylinder 232. The second pushing cylinder 232 and the second pushing block 233 are each provided with two groups, and the two groups are arranged in a close fit. A double clamping block is installed below the output end of the clamping cylinder 231. The clamping cylinder 231 clamps the two rod tubes 131 at the same time, so that the rod tubes 131 are fixed on the fixed double-slot card 258. At this time, the two second pushing cylinders 232 push the plug 133 at the same time, so that the plug 133 penetrates into the rod tube 131.

[0032] The sheet clamping member 240 includes a second finger cylinder 241 and a third finger cylinder 242. A second downward moving cylinder 245 is arranged above the second finger cylinder 241. The back of the second downward moving cylinder 245 is limitedly slidably connected to the first slide 244. One side of the second downward moving cylinder 245 is transmission-connected to the first displacement cylinder 246. The third finger cylinder 242 is located on the back of the clamping cylinder 231 and is arranged corresponding to the second pushing block 233. The two ends below the first slide 244 are connected to support rods 243, the second downward cylinder 245 is limitedly slidably connected to the first slide 244, one side of the first displacement cylinder 246 is fixedly connected to the mounting plate of the first slide 244, the output end of the first displacement cylinder 246 is transmission-connected to the second downward cylinder 245, the third finger cylinder 242 is provided with two groups, and the two groups are correspondingly installed at the bottom of the second downward cylinder 245, the third finger cylinder 242 is clamped with the card 134, and a telescopic push rod is connected to the back of the third finger cylinder 242, the first displacement cylinder 246 drives the second finger cylinder 241 to move horizontally, and the second downward cylinder 245 drives the second finger cylinder 241 to move longitudinally, so as to facilitate the clamping of the card 134, and the card 134 is placed on the two third finger cylinders 242 at the same time, and the third finger cylinder 242 deeply clamps the card 134 inside the rod tube 131.

[0033] The component transport part 250 includes a connecting rod 251, a displacement double-slot card 252 and a mounting seat 254. The connecting rod 251 is fixedly connected to both sides of the mounting seat 254, and the displacement double-slot card 252 is installed above the connecting rod 251 at equal intervals. The displacement double-slot card 252 is equally divided into four groups. The bottom of the mounting seat 254 is fixedly connected to an upward cylinder 255, and the upward cylinder 255 is limitedly slidably connected to a second slide 256. One side of the mounting seat 254 is fixedly connected to a second displacement cylinder 257. The displacement double-slot card 252 at one end of the connecting rod 251 is arranged corresponding to the rod tube 131 above the conveying assembly 120, and the displacement double-slot card 252 at the tail of the connecting rod 251 is arranged corresponding to the conveyor belt 140. Fixed double-slot cards 258 are respectively arranged on both sides of the displacement double-slot card 252. The fixed double-slot cards 258 are respectively arranged corresponding to the first pushing block 222 and the second pushing block 233. The displacement double-slot card 252 and the fixed double-slot card 258 are respectively located at both ends of the rod tube 131. The upward cylinder 255 is used to drive multiple groups of rod tubes 131 to move upward at the same time. The second displacement cylinder 257 is used to drive multiple groups of rod tubes 131 to move toward one end of the conveyor belt 140 at the same time.

[0034] Working principle: The conveying assembly 120 conveys the rod tube 131 for transportation, and each two rod tubes 131 form a group. When the conveying assembly 120 is transferred to one end of the assembly transfer part 250, the second displacement cylinder 257 cooperates with the second slide 256 to drive the mounting seat 254 close to the end of the conveying assembly 120. At this time, the upward cylinder 255 drives the mounting seat 254 to rise, so that the mounting seat 254 drives multiple groups of displacement double-slot cards 252 to move up at the same time. The displacement double-slot cards 252 move up to lift the rod tube 131 on the conveying assembly 120 and the rod tube 131 above the fixed double-slot card 258. At this time, the second displacement cylinder 257 retracts, driving the rod tube 131 The rod tube 131 processed above the transmission component 120 is placed above the first set of fixed double-slot clamps 258. At this time, the bolt feeder 210 processes the rod tube 131, and the rod tube 131 processed by the bolt feeder 210 moves to the fixed double-slot clamp 258 between the plug mounting parts 220. At this time, the plug material 310 transmits the plug 133 to the bottom of the first finger cylinder 223 through vibration. At this time, the first finger cylinder 223 is driven downward by the first downward cylinder 224 to clamp the plug 133, and the translation cylinder 225 drives the first downward cylinder 224 to move to the fixed double At one end of the rod tube 131 above the slot card 258, the first downward cylinder 224 drives the first finger cylinder 223 to move downward and place the plug 133 at the end of the rod tube 131. At this time, the first tightening cylinder 221 is controlled to drive the first push block 222 to insert the plug 133 into the rod tube 131. After the plug installation part 220 is processed, the component transfer part 250 transports the processed components to the fixed double-slot card 258 between the plug pressing parts 230. At this time, the pressing cylinder 231 moves downward to press the two groups of rod tubes 131. At the same time, the second tightening cylinder 232 pushes the second tightening block 233 to make the plug 133 completely penetrate into the rod tube 131. At the same time, the second finger cylinder 241 clamps the card 134 transmitted by the card loading part 320, and is driven by the second downward cylinder 245 and the first displacement cylinder 246 to be located directly above the third finger cylinder 242, and the card 134 is placed in the third finger cylinder 242. At this time, the push rod pushes the card 134 through the positioning plate on one side of the clamping cylinder 231 and extends into the other end of the rod tube 131. The assembly is completed, and the component transfer part 250 transports the telescopic rod assembly 130 assembled with the plug tightening part 230 and the sheet clamping part 240 to the conveyor belt 140, and the conveyor belt 140 transports the telescopic rod assembly 130 to a suitable position.

[0035] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A telescopic rod assembly device, comprising a conveyor belt for transmitting telescopic rod parts, a plug upper material piece for feeding the telescopic rod parts, a card upper material piece for feeding the telescopic rod parts, and a bolt feeder for assembling the telescopic rod parts, characterized in that: Also includes A feeding mechanism, the feeding mechanism comprising a transmission assembly and a telescopic rod assembly; An assembly mechanism is installed between the transmission component and the conveyor belt, the assembly mechanism includes a plug mounting member, a plug tightening member and a sheet clamping member, the bolt feeder is located at one end close to the transmission component, the plug mounting member is installed on one side of the bolt feeder, the plug tightening member is installed on one side of the plug mounting member, and the sheet clamping member is installed on the end of the plug tightening member. A component transfer member is provided between the transmission component and the conveyor belt, and the component transfer member is provided corresponding to the bolt feeder, the plug mounting member, the plug tightening member and the sheet clamping member.

2. A telescopic rod assembly device according to claim 1, characterized in that: A supporting assembly is arranged at the bottom of the conveying assembly, and limiting protrusions are equally arranged on the conveying belt of the conveying assembly, and the telescopic rod assembly is placed between two limiting protrusions.

3. A telescopic rod assembly device as claimed in claim 2, characterized in that: The telescopic rod assembly comprises a rod tube, a plug is clamped at the end of the rod tube, a card is arranged inside the other end of the rod tube, and a bolt is threadedly installed on the surface of the rod tube.

4. A telescopic rod assembly device as claimed in claim 3, characterized in that: The plug mounting part includes a first pushing cylinder, the end of which is fixedly connected to a first pushing block, a first finger cylinder is arranged above one side of the first pushing cylinder, a translation cylinder is installed above the first finger cylinder, and a first downward cylinder is installed on the back of the translation cylinder.

5. A telescopic rod assembly device as claimed in claim 4, characterized in that: The translation cylinder is fixedly installed above one side of the first pushing cylinder through a mounting plate, the first downward cylinder is limitedly slidably installed on the fixing plate and is transmission-connected to the translation cylinder, two groups of first finger cylinders are installed at the bottom of the first downward cylinder through a plate, and two groups of first push blocks are correspondingly arranged at the bottom of the two groups of the first finger cylinders, and the two groups of the first push blocks are fixedly connected to the output end of the first pushing cylinder.

6. A telescopic rod assembly device as claimed in claim 5, characterized in that: The plug tightening member includes a clamping cylinder and a second pushing cylinder, the second pushing cylinder is installed on one side of the first pushing cylinder, the output end of the second pushing cylinder is fixedly connected to a second pushing block, the clamping cylinder is arranged on the opposite side of the second pushing cylinder, and the second pushing cylinder and the second pushing block are each provided with two groups, and the two groups are arranged in a close fit.

7. A telescopic rod assembly device as claimed in claim 6, characterized in that: The sheet clamping part includes a second finger cylinder and a third finger cylinder. A second downward moving cylinder is arranged above the second finger cylinder. The back of the second downward moving cylinder is limitedly slidably connected to the first slide table. One side of the second downward moving cylinder is transmission-connected to the first displacement cylinder. The third finger cylinder is located on the back of the clamping cylinder and is arranged corresponding to the second pushing block.

8. A telescopic rod assembly device as claimed in claim 7, characterized in that: The lower ends of the first slide are connected with support rods, the second downward cylinder is limitedly slidably connected to the first slide, one side of the first displacement cylinder is fixedly connected to the mounting plate of the first slide, the output end of the first displacement cylinder is transmission-connected to the second downward cylinder, the third finger cylinder is provided with two groups, and the two groups are correspondingly installed at the bottom of the second downward cylinder, the third finger cylinder is clamped with the card, and the back of the third finger cylinder is connected with a telescopic push rod.

9. The telescopic rod assembly device according to claim 7, characterized in that: The component transport part includes a connecting rod, a displacement double-slot card and a mounting seat, the connecting rod is fixedly connected to both sides of the mounting seat respectively, the displacement double-slot card is installed above the connecting rod at equal intervals, the displacement double-slot card is equally divided into four groups, the bottom of the mounting seat is fixedly connected to an upward cylinder, the upward cylinder is limitedly slidably connected to a second slide, and one side of the mounting seat is fixedly connected to a second displacement cylinder.

10. A telescopic rod assembly device as claimed in claim 9, characterized in that: The displacement double-slot card at one end of the connecting rod is arranged corresponding to the rod tube above the transmission component, the displacement double-slot card at the tail of the connecting rod is arranged corresponding to the conveyor belt, fixed double-slot cards are arranged on both sides of the displacement double-slot card, and the fixed double-slot cards are arranged corresponding to the first pushing block and the second pushing block respectively, and the displacement double-slot card and the fixed double-slot card are respectively located at the two ends of the rod tube.

Images