Clamping device and steel bar threading machine

Abstract

The utility model discloses a clamping device and a reinforcing steel bar threading machine, relates to the field of construction machinery, solves the problem of reinforcing steel bar alignment, and adopts the technical scheme that the clamping device comprises a clamping mechanism and a driving mechanism; the clamping mechanism comprises a bench clamp; a clamping assembly is arranged on the bench clamp; the clamping assembly comprises a tooth seat and a plurality of tooth parts; the plurality of tooth parts are arranged on the tooth seat at intervals; the tooth part comprises a plurality of teeth; arc-shaped notches are formed in the teeth; the teeth are vertically arranged; the bench clamp comprises a first bench clamp and a second bench clamp; the first bench clamp and the second bench clamp are oppositely arranged; teeth on the first bench clamp and the second bench clamp are opposite in a staggered manner; the first bench clamp and the second bench clamp can be close to each other or away from each other; the first bench clamp and the second bench clamp are driven by a driving mechanism to get close to or away from each other. The purpose of automatically aligning the axes of the steel bars in the clamping process is achieved.

Description

Technical Field

[0001] The utility model relates to the field of construction engineering processing machinery, and more specifically, to a clamping device and a steel bar threading machine. Background Art

[0002] The straight thread threading machine for steel bars is a machine specially used for processing threads, and is mainly used for processing straight thread heads of construction steel bars. It uses cold-rolled tooth shape, and can process threads of various long strip materials such as steel bars with different diameters, threaded steel bars, threaded pipes, threaded joints, etc. The working principle of the straight thread threading machine for steel bars is to first put the steel bars to be processed into the clamping device, impact and clamp them, and then start the threading device to rotate and move to achieve the stripping and threading of the steel bars. In the prior art, after different steel bars are clamped, there is a situation where the axis of the steel bar deviates from the axis of the threading device. The main reason is that the steel bar cannot move automatically to align with the axis of the threading device during the approach of the clamping mechanism. Utility Model Content

[0003] In a first aspect, the utility model aims to provide a clamping device to achieve the purpose of automatically aligning the steel bar with the axis of the threading device.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions: a clamping device, including a clamping mechanism and a driving mechanism; the clamping mechanism includes a bench vise; a clamping assembly is arranged on the bench vise; the clamping assembly includes a tooth seat and a plurality of tooth parts; the plurality of tooth parts are arranged on the tooth seat at intervals; the tooth part includes a plurality of teeth; an arc-shaped notch is arranged on the teeth; the teeth are arranged vertically; the bench vise includes a first bench vise and a second bench vise; the first bench vise and the second bench vise are arranged opposite to each other; the teeth on the first bench vise and the second bench vise are staggered relative to each other; the first bench vise and the second bench vise can be close to or away from each other; the first bench vise and the second bench vise are driven to be close to or away from each other by the driving mechanism.

[0005] In this solution, the first pliers and the second pliers are staggered. When the first pliers and the second pliers are close to each other, the arc-shaped notches of the teeth on the first pliers and the second pliers are close to each other, and the center parts are getting closer and closer, which can adapt to steel bars of different diameters. Because the teeth are arranged vertically, when the steel bar is placed between the teeth, the steel bar can slide along the teeth toward the center position during the process of the first pliers and the second pliers approaching each other, and finally the axis of the steel bar is in the center position of the arc groove. Through the above solution, no matter what diameter of steel bar is clamped, the automatic centering of the steel bar can be achieved to avoid the deviation of the axis of the steel bar and the axis of the threading device.

[0006] Furthermore, the bench vise is provided with a mounting groove; a mounting hole is provided at the bottom of the mounting groove; the tooth seat is provided in the mounting groove; a threaded hole is provided at the bottom of the tooth seat; the positions of the mounting hole and the threaded hole correspond to each other; the mounting hole and the threaded hole are connected by bolts, so that the tooth seat can be fixed on the bench vise.

[0007] In this solution, the mounting groove and the tooth seat are detachably connected, so that the teeth can be easily replaced after they are damaged.

[0008] Furthermore, the clamping mechanism also includes a first clamping seat and a second clamping seat; the first clamping seat and the second clamping seat are connected by a guide rod and a screw rod; the screw rod is provided with a first threaded segment and a second threaded segment; the thread directions of the first threaded segment and the second threaded segment are opposite; the first vise and the second vise are respectively provided with vise holes matching the first threaded segment and the second threaded segment; the first vise and the second vise are also provided with guide holes matching the guide rod.

[0009] In this solution, the threads on the first thread segment and the second thread segment are in opposite directions. When the screw rod rotates, the first and second vises respectively arranged thereon move in opposite directions, thereby achieving the clamping or releasing effect of the vise. The guide rod can prevent the vise from rotating along the axis of the screw rod, thereby achieving its function of moving on the screw rod.

[0010] Furthermore, the guide rod includes a first guide rod and a second guide rod; the first guide rod and the second guide rod are respectively arranged at two ends of the screw rod.

[0011] In this solution, two guide rods are provided to better disperse the force and increase the reliability of the vise.

[0012] Furthermore, the driving mechanism includes a first push rod and a first tooth plate; the first tooth plate is arranged on the first push rod; the screw rod is provided with a first gear; the first tooth plate cooperates with the first gear; the extension and retraction of the first push rod can drive the first gear to rotate.

[0013] In the prior art, the clamping of the bench vise requires manual operation. In this solution, the first push rod drives the first gear to rotate and then drives the screw to rotate, so that the first bench vise and the second bench vise can be moved closer or farther away, which can reduce the work intensity of workers.

[0014] Furthermore, it also includes a tooth plate support assembly; the tooth plate support assembly includes a tooth plate support seat and a tooth plate support roller arranged on the tooth plate support seat; the tooth plate support roller is arranged on the back side of the first tooth plate; the first tooth plate is in contact with the tooth plate support roller.

[0015] In this solution, the tooth plate and the gear can be tightly meshed with each other through the tooth plate support assembly to prevent the tooth plate and the gear from separating during the movement.

[0016] Furthermore, the first push rod is one of an electric push rod, a pneumatic push rod and a hydraulic push rod.

[0017] In the second aspect, the utility model provides a steel bar threading machine, any one of the above-mentioned clamping devices; the steel bar threading machine includes a cabinet; the clamping device is arranged on the cabinet; the cabinet is also provided with a threading device and a driving device; the clamping device is used to clamp the steel bar; the threading device is arranged on the driving device, and the driving device can drive the threading device to move back and forth in a straight line; the threading device is used to thread the steel bar.

[0018] In summary, the utility model has the following beneficial effects:

[0019] 1. The first vise and the second vise are set in an offset manner. When the first vise and the second vise are close to each other along the axis of the steel bar, the arc-shaped notches of the teeth on the first vise and the second vise are close to each other, and the center parts are getting closer and closer, which can adapt to steel bars of different diameters. Because the teeth are set vertically, when the steel bar is placed between the teeth, the steel bar can slide along the teeth to the center position during the process of the first vise and the second vise approaching, and finally the axis of the steel bar is in the center position of the arc groove. Through the above scheme, no matter what diameter of steel bar is clamped, the automatic centering of the steel bar can be achieved to avoid the deviation of the axis of the steel bar and the axis of the threading device.

[0020] 2. The first push rod drives the screw rod, which reduces the workers' work intensity and improves their work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of a steel bar threading machine according to an embodiment

[0022] Figure 2 yes Figure 1 Partial enlargement

[0023] Figure 3 sectional view of the limiting seat of the embodiment

[0024] Figure 4 Schematic diagram of the driving device of the embodiment

[0025] Figure 5 Schematic diagram of the clamping device

[0026] Figure 6 This is a schematic diagram of the first and second vises.

[0027] Figure 7 yes Figure 6 Partial enlargement

[0028] Figure 8 Schematic diagram of the chip receiving groove and liquid receiving groove of the embodiment

[0029] In the figure: 1, cabinet; 11, workbench; 2, clamping device; 21, first vise; 22, second vise; 23, tooth seat; 24, tooth component; 241, tooth; 251, first clamping seat; 252, second clamping seat; 253, screw rod; 254, guide rod; 26, first push rod; 261, first tooth plate; 262, first gear; 263, tooth plate support seat; 264, tooth plate support roller; 3, threading device; 31, reducer; 32, motor; 331, chuck; 332, cutter head; 34, limit component; 34 1. Limit wheel; 342. Limit seat; 3421. Reset chamber; 3422. Adjustment hole; 343. Limit shaft; 3431. Reset plate; 3432. Beam hole; 3433. Reset spring; 344. Drive beam; 3441. Narrow portion; 3442. Wide portion; 3443. Smooth portion; 3444. Slot hole; 345. Adjustment seat; 346. Adjustment rod; 347. Reset wheel; 4. Driving device; 41. Driving rod; 411. Second gear; 412. Handle; 42. Driving seat; 421. Second tooth plate; 43. Guide rod. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component. The "connection" is not limited to fixed connection or movable connection. The specific connection method should be determined based on the specific technical problem to be solved.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] Example:

[0035] A steel bar threading machine comprises a cabinet 1, a workbench 11 is arranged above the cabinet 1; the workbench 11 is provided with a clamping device 2, a threading device 3 and a driving device 4; the threading device 3 is arranged on the driving device 4, and the driving device 4 can drive the threading device 3 to move back and forth in a straight line; the clamping device 2 is used to clamp the steel bar; the threading device 3 is used to peel and thread the steel bar.

[0036] In this embodiment, the threading device 3 includes a peeling mechanism, a threading mechanism, a peeling length adjustment mechanism, a motor 32 and a reducer 31; the output shaft of the motor 32 is connected to the input shaft of the reducer 31, and the reducer 31 reduces the rotation speed and increases the torque; the output shaft of the reducer 31 is connected to the threading mechanism, and the threading mechanism is used to thread the steel bar; the threading machine is connected to the peeling mechanism to drive the peeling mechanism to rotate. The peeling mechanism, the threading mechanism, the reducer 31 and the motor 32 are coaxially arranged. The connection method of the peeling mechanism, the threading mechanism, the positioning mechanism, the motor 32 and the reducer 31 belongs to the conventional technical solution and will not be repeated here.

[0037] In this embodiment, the driving device 4 includes a driving rod 41 and a driving seat 42; the driving rod 41 is arranged in the cabinet 1, and a second gear 411 is arranged on the driving rod 41; a second gear 411 is arranged at the bottom of the driving seat 42; the second gear 411 is meshed with a second tooth plate 421. A guide rod 43 is also arranged on the workbench 11; a guide hole matching the guide rod 43 is arranged on the driving seat 42. The reducer 31 is arranged on the driving seat 42. Preferably, a handle 412 is arranged on the driving rod 41, and the driving rod 41 is driven to rotate by rotating the handle 412, and the gear on the driving rod 41 drives the tooth plate to move, thereby driving the reducer 31 and the electrode, threading mechanism, and peeling mechanism connected to the reduction base to move forward and backward. Preferably, two groups of guide rods 43 are arranged on the workbench 11, and the two groups of guide rods 43 are respectively located on both sides of the threading device 3, and the threading device 3 can be moved forward and backward along the axis through the guide rods 43.

[0038] In this embodiment, the peeling mechanism includes a cutter head 332 and a chuck 331; the chuck 331 is sleeved on the cutter head 332; the chuck 331 is extended or retracted to put the cutter head 332 in a working or non-working state. When the chuck 331 is extended, the limiting mechanism on the chuck 331 causes the cutter head 332 to move toward the central axis, and when the peeling mechanism moves toward the clamping device 2, the steel bar passes through the cutter head 332 to achieve cutting of the steel bar. When the chuck 331 is in a retracted state, the cutter head 332 is away from the central axis and no longer cuts the steel bar. The matching relationship between the chuck 331 and the cutter head 332 belongs to the conventional technical solution in this field, and will not be repeated here. Preferably, the drive seat 42 is connected to the second push rod, and the forward and backward movement of the drive seat 42 is completed by the second push rod.

[0039] In this embodiment, a stripping length adjustment mechanism is also included, and the stripping length adjustment mechanism includes a limiting component 34, a length adjustment component and a driving beam 344; the limiting component 34 is arranged on the length adjustment component; a limiting wheel 341 is arranged on the limiting component 34; the limiting wheel 341 is used to retract the chuck 331; the driving beam 344 is used to extend or retract the limiting wheel 341; the length adjustment component is used to adjust the position of the limiting wheel 341. The driving beam 344 is fixed on the driving seat 42.

[0040] In this embodiment, the limiting component 34 includes a limiting seat 342 and a limiting wheel 341 assembly; the limiting wheel 341 assembly includes a limiting wheel 341 shaft and a limiting wheel 341; the limiting wheel 341 is arranged on the limiting shaft 343; the limiting shaft 343 is arranged on the limiting seat 342; the limiting shaft 343 is also provided with a beam hole 3432; the driving beam 344 includes a narrow portion 3441 and a wide portion 3442; the narrow portion 3441 and the wide portion 3442 are transitioned through a smooth portion 3443; the narrow portion 3441 of the driving beam 344 is arranged at one end away from the driving seat 42, and the wide portion 3442 is arranged at one end close to the driving seat 42. The driving beam 344 passes through the beam hole 3432; after the beam hole 3432 moves from the narrow part 3441 to the wide part 3442, the limiting wheel 341 retracts; the limiting wheel 341 assembly also includes a reset mechanism; when the beam hole 3432 moves from the wide part 3442 to the narrow part 3441; the reset mechanism is used to extend the limiting wheel 341. The reset mechanism includes a reset cavity 3421 arranged on the limiting seat 342, and a reset plate 3431 arranged on the limiting shaft 343; it also includes a reset spring 3433, and the two ends of the reset spring 3433 are respectively connected to the reset plate 3431 and the limiting seat 342; when the limiting wheel 341 retracts, the reset spring 3433 is in an extruded state. When in use, the reset spring 3433 is in a non-compressed state, and the drive shaft extends out; when the chuck 331 on the stripping mechanism moves to the limiting wheel 341, due to the obstruction of the limiting wheel 341, the chuck 331 retracts, the cutter head 332 moves away from the central axis, and the steel bar stripping is terminated; at this time, since the threading is not completed, the threading device 3 still needs to move forward. In order to prevent the limiting wheel 341 from blocking the advancement of the threading device 3, the limiting wheel 341 needs to be retracted. The driving beam 344 moves along the axial direction following the driving seat 42; the limiting seat 342 is fixed in position, and the driving beam 344 moves in the beam hole 3432. When the beam hole 3432 passes through the smooth part 3443, that is, when the narrow part 3441 moves to the wide part 3442, the limiting shaft 343 moves perpendicular to the moving direction, driving the limiting wheel 341 to retract. On the contrary, the limiting wheel 341 extends out. The limiting wheel 341 can rotate on the limiting shaft 343 . When the rotating chuck 331 contacts the limiting wheel 341 , the limiting wheel 341 can be driven to rotate, thereby reducing the friction between the two and preventing damage to the limiting wheel 341 .

[0041] In this embodiment, the length adjustment component includes an adjustment seat 345; the adjustment seat 345 is arranged on the workbench 11; an adjustment rod 346 is arranged on the adjustment seat 345; an adjustment hole 3422 adapted to the adjustment rod 346 is arranged on the limit seat 342; the adjustment seat 345 can slide on the adjustment rod 346; a fixing screw is also arranged on the adjustment seat 345; the fixing screw extends into the adjustment hole 3422 and cooperates with the adjustment rod 346 to fix the adjustment seat 345. By adjusting the position of the limit seat 342 on the adjustment rod 346, the distance between the smooth part 3443 and the beam hole 3432 before processing can be changed. The longer the distance between the smooth part 3443 and the beam hole 3432 is, the longer the steel bar is peeled. On the contrary, the steel bar is peeled shorter. Preferably, a slot hole is arranged on the driving beam 344, and a screw hole is arranged on the driving seat 42; the driving beam 344 is fixed to the driving seat 42 through the slot hole 3444 and the screw hole. By changing the positional relationship between the screw hole and the slotted hole, the distance between the smooth portion 3443 and the drive shaft can be adjusted, thereby adjusting the length of the steel bar to be peeled. Preferably, a scale is provided on the adjustment rod 346. The scale can be used to better set the peeling length.

[0042] In this embodiment, a reset wheel is provided on the adjusting seat 345; the reset wheel is used to extend the chuck 331; the reset wheel is connected to the adjusting seat 345 via a reset shaft. After the threading is completed, the threading device 3 moves backward, and when the chuck 331 passes through the reset wheel, it is blocked by the reset wheel, the chuck 331 extends, and the cutter head 332 is close to the central axis to prepare for the next processing.

[0043] In this embodiment, the clamping device 2 includes a clamping mechanism and a driving mechanism; the clamping mechanism includes a bench vise; a clamping assembly is arranged on the bench vise; the clamping assembly includes a tooth seat 23 and a plurality of tooth parts 24; the plurality of tooth parts 24 are arranged on the tooth seat 23 at intervals; the tooth part 24 includes a plurality of teeth 241; an arc-shaped notch is arranged on the teeth 241; the teeth 241 are arranged vertically; the bench vise includes a first bench vise 21 and a second bench vise 22; the first bench vise 21 and the second bench vise 22 are arranged opposite to each other; the teeth 241 on the first bench vise 21 and the second bench vise 22 are staggered relative to each other; the first bench vise 21 and the second bench vise 22 can be close to or away from each other; the first bench vise 21 and the second bench vise 22 are driven to be close to or away from each other by the driving mechanism.

[0044] The first bench clamp 21 and the second bench clamp 22 are staggered. When viewed along the axis of the steel bar, the midpoint of the arc-shaped notch line is on the same axis, and the axis coincides with the axis of the threading device 3. When the first bench clamp 21 and the second bench clamp 22 are close to each other, the arc-shaped notches of the teeth 241 on the first bench clamp 21 and the second bench clamp 22 are close to each other, and the center parts are getting closer and closer, which can adapt to steel bars of different diameters. In addition, since the teeth 241 are vertically arranged, when the steel bar is placed between the teeth 241, during the process of the first bench clamp 21 and the second bench clamp 22 approaching each other, the steel bar can slide along the teeth 241 toward the center position, and finally the axis of the steel bar is in the center position of the arc groove. Through the above scheme, no matter what diameter of steel bar is clamped, the automatic centering of the steel bar can be achieved to avoid the deviation of the axis of the steel bar from the axis of the threading device 3.

[0045] In this embodiment, the bench vise is provided with a mounting groove; a mounting hole is provided at the bottom of the mounting groove; the tooth seat 23 is provided in the mounting groove; a threaded hole is provided at the bottom of the tooth seat 23; the positions of the mounting hole and the threaded hole correspond to each other; the mounting hole and the threaded hole are connected by bolts, so that the tooth seat 23 can be fixed on the bench vise. The mounting groove and the tooth seat 23 are detachably connected, so that the tooth 241 can be replaced easily after the tooth 241 is damaged.

[0046] In this embodiment, the clamping mechanism further includes a first clamping seat 251 and a second clamping seat 252; the first clamping seat 251 and the second clamping seat 252 are connected by a guide rod 254 and a screw rod 253; the screw rod 253 is provided with a first thread segment and a second thread segment; the thread directions of the first thread segment and the second thread segment are opposite; the first bench vise 21 and the second bench vise 22 are respectively provided with bench vise holes matching the first thread segment and the second thread segment; the first bench vise 21 and the second bench vise 22 are also provided with guide holes matching the guide rod 254. The thread directions of the first thread segment and the second thread segment are opposite, and when the screw rod 253 rotates, the first bench vise 21 and the second bench vise 22 respectively arranged thereon move in opposite directions, so that the clamping or releasing effect can be achieved. The guide rod 254 can prevent the bench vise from rotating along the axis of the screw rod 253, so as to achieve its function of moving on the screw rod 253.

[0047] In this embodiment, the guide rod 254 includes a first guide rod 254 and a second guide rod 254; the first guide rod 254 and the second guide rod 254 are respectively arranged at two ends of the screw rod 253. Providing two guide rods 254 can better disperse the force and increase the reliability of the vise.

[0048] In this embodiment, the driving mechanism includes a first push rod 26 and a first tooth plate 261; the first tooth plate 261 is arranged on the first push rod 26; the screw rod 253 is provided with a first gear 262; the first tooth plate 261 cooperates with the first gear 262; the first push rod 26 can drive the first gear 262 to rotate when it is extended and retracted. The first push rod 26 drives the first gear 262 to rotate and then drives the screw rod 253 to rotate, so that the first vise 21 and the second vise 22 are moved closer or farther away, which can reduce the work intensity of the workers.

[0049] In this embodiment, the clamping device 2 further includes a toothed plate support assembly; the toothed plate support assembly includes a toothed plate support seat 263 and a toothed plate support roller 264 disposed on the toothed plate support seat 263; the toothed plate support roller 264 is disposed on the back of the first toothed plate 261; the first toothed plate 261 is in contact with the toothed plate support roller 264. The toothed plate support assembly can make the toothed plate and the gear mesh closely with each other to prevent the toothed plate and the gear from separating during the movement. Optionally, the first push rod 26 is one of an electric push rod, a pneumatic push rod and a hydraulic push rod.

[0050] In this embodiment, a chip receiving groove is provided on the cabinet 1; the chip receiving groove includes a bottom plate; the bottom plate is inclined; the bottom plate includes a high part and a low part; a chip outlet is also provided at one end of the chip receiving groove near the low part; a liquid leakage hole is provided on the bottom plate; a liquid receiving groove is provided below the chip receiving groove; a liquid baffle plate is provided on the chip outlet; and the liquid baffle plate is hinged to the chip receiving groove. A liquid leakage hole is provided on the bottom plate of the chip receiving groove, and the cutting fluid can enter the liquid receiving groove at the lower end through the liquid leakage hole to realize the recovery of the cutting fluid. The bottom plate is in an inclined state, and the iron chips will move downward along the bottom plate to be discharged from the chip receiving groove after being generated. The above scheme makes it more convenient to discharge the iron chips. When the cutting fluid mixed with iron chips moves downward to the liquid baffle plate, it is blocked by the liquid baffle plate to prevent the cutting fluid from flowing out of the chip outlet and unable to enter the liquid receiving groove below. When the iron chips accumulated at the liquid baffle plate are sufficient, the iron chips can be scraped off by flipping the liquid baffle plate.

[0051] In this embodiment, a workbench 11 is provided on the cabinet 1, and a first mounting hole is provided on the workbench 11; the chip receiving groove includes an upper edge; the upper edge cooperates with the first mounting hole to mount the chip receiving groove on the workbench 11. In this solution, the chip receiving groove is mounted on the upper edge, and the chip receiving groove does not protrude from the workbench 11 surface, making the surface neater.

[0052] Method of use: Adjust the position of the limiting wheel 341 according to the length of the threading and stripping, so that it is at a suitable distance from the smooth part 3443. Place the steel bar between the teeth 241 of the clamping device 2, start the first push rod 26, and the clamping device 2 completes the clamping of the steel bar. Start the motor 32, and the stripping mechanism and the threading mechanism rotate. Use the handle 412 to control the drive seat 42 to move toward the clamping device 2. The steel bar first contacts the stripping device; when the chuck 331 contacts the limiting wheel 341, the chuck 331 retracts; when the smooth part 3443 on the driving beam 344 contacts the limiting groove, it transitions to the wide part 3442, and the limiting shaft 343 is retracted; the threading mechanism continues to move forward, and the steel bar enters the threading mechanism to complete the threading; after the threading is completed, the motor 32 reverses, the handle 412 reverses, and retracts; the chuck 331 contacts the reset wheel and extends; the beam hole 3432 returns to the narrow part 3441, and the limiting shaft 343 extends.

[0053] Advantages of this solution: The first vise 21 and the second vise 22 are staggered. When the first vise 21 and the second vise 22 are close to each other, the arc-shaped notches of the teeth 241 on the first vise 21 and the second vise 22 are close to each other, and the center parts are getting closer and closer, which can adapt to steel bars of different diameters. Because the teeth 241 are vertically arranged, when the steel bar is placed between the teeth 241, the steel bar can slide toward the center position along the teeth 241 during the process of the first vise 21 and the second vise 22 approaching each other, and finally the axis of the steel bar is in the center position of the arc groove. Through the above scheme, no matter what diameter of steel bar is clamped, the automatic centering of the steel bar can be achieved to avoid the deviation of the axis of the steel bar and the axis of the threading device 3.

[0054] The first push rod 26 drives the screw rod 253, which reduces the work intensity of workers and improves their work efficiency.

[0055] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A clamping device, characterized in that: It includes a clamping mechanism and a driving mechanism; the clamping mechanism includes a bench vise; a clamping assembly is arranged on the bench vise; the clamping assembly includes a tooth seat and a plurality of tooth parts; the plurality of tooth parts are arranged on the tooth seat at intervals; the tooth part includes a plurality of teeth; an arc-shaped notch is arranged on the teeth; the teeth are arranged vertically; The bench vise comprises a first bench vise and a second bench vise; the first bench vise and the second bench vise are arranged opposite to each other; the teeth on the first bench vise and the second bench vise are offset and opposite to each other; the first bench vise and the second bench vise are used to move closer to or farther away from each other; the first bench vise and the second bench vise are driven to move closer to or farther away from each other by a driving mechanism.

2. A clamping device according to claim 1, characterized in that: The bench vise is provided with a mounting groove; a mounting hole is provided at the bottom of the mounting groove; a tooth seat is provided in the mounting groove; a threaded hole is provided at the bottom of the tooth seat; the positions of the mounting hole and the threaded hole correspond to each other; the mounting hole and the threaded hole are connected by bolts, so that the tooth seat can be fixed on the bench vise.

3. A clamping device according to claim 1, characterized in that: The clamping mechanism also includes a first clamping seat and a second clamping seat; the first clamping seat and the second clamping seat are connected by a guide rod and a screw rod; the screw rod is provided with a first thread segment and a second thread segment; the threads of the first thread segment and the second thread segment have opposite directions; the first vise and the second vise are respectively provided with vise holes matching the first thread segment and the second thread segment; the first vise and the second vise are also provided with guide holes matching the guide rod.

4. A clamping device according to claim 3, characterized in that: The guide rod comprises a first guide rod and a second guide rod; the first guide rod and the second guide rod are respectively arranged at two ends of the screw rod.

5. A clamping device according to claim 3, characterized in that: The driving mechanism comprises a first push rod and a first toothed plate; the first toothed plate is arranged on the first push rod; the screw rod is provided with a first gear; the first toothed plate matches with the first gear; the extension and retraction of the first push rod can drive the first gear to rotate.

6. A clamping device according to claim 5, characterized in that: It also includes a tooth plate support assembly; the tooth plate support assembly includes a tooth plate support seat and a tooth plate support roller disposed on the tooth plate support seat; the tooth plate support roller is disposed on the back side of the first tooth plate; The first tooth plate is in contact with the tooth plate supporting roller.

7. A clamping device according to claim 6, characterized in that: The first push rod is one of an electric push rod, a pneumatic push rod and a hydraulic push rod.

8. A steel bar threading machine, characterized in that: It comprises the clamping device as described in any one of claims 1 to 7; the steel bar threading machine comprises a cabinet; the clamping device is arranged on the cabinet; a threading device and a driving device are also arranged on the cabinet; the clamping device is used to clamp the steel bar; the threading device is arranged on the driving device, and the driving device is used to drive the threading device to move back and forth in a straight line; the threading device is used to thread the steel bar.

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