Feed-in locking device of feed-in trolley of cold pilger mill

Abstract

The invention discloses a feed-in locking device of a feed-in trolley of a cold pilger mill, belongs to the field of pipe cold rolling clamping, solves the problems that a locking device on a feed-in trolley in the prior art can scratch the outer surface of a pipe, meanwhile, the locking stability is poor, and the subsequent machining quality is affected, and comprises a case, a hollow shaft, a holding plate, a lock sleeve and a lock sleeve driving assembly; three mounting ports are formed in the side wall of the hollow shaft; the three enclasping plates are mounted in the three mounting ports and can move in the radial direction of the hollow shaft, and outer guide surfaces are arranged on the outer side walls of the enclasping plates; the hollow shaft is sleeved with the lock sleeve, the lock sleeve can axially move, an inner guide face is arranged on the inner wall of the lock sleeve, and when the lock sleeve moves, the outer guide face is matched with the inner guide face to drive the multiple enclasping plates to move towards or away from the center line of the hollow shaft at the same time, so that the pipe is enclasped or loosened; the lock sleeve driving assembly drives the lock sleeve to move relative to the hollow shaft. The surface of the pipe can be prevented from being scratched, the pipe can be stably locked, and the rolling quality of the pipe is improved.

Description

Technical Field

[0001] The invention relates to the field of workpiece clamping, and in particular to a feeding locking device for a feeding trolley of a cold rolling tube mill. Background Art

[0002] In the cold rolling mill, the feeding trolley is an important device, which can clamp the tube through the locking device, and then send the tube from the front to the back of the rolling mill to complete the continuous rolling process.

[0003] In the prior art, the locking device for clamping the pipe is arranged at the end of the hollow shaft, and its structure includes three clamping pieces arranged in a circle and enclosing to form a tubular shape, an annular spring enclosing the outer ring of the three clamping pieces to bring the three clamping pieces closer together, and a buffering piece arranged between each two adjacent clamping pieces to properly open the adjacent clamping pieces, as shown in the locking device disclosed in the patent document with publication number CN217413214U. The locking device of this structure has the following problems when used: 1. After the pipe passes through the trolley channel, the end of the pipe rests on the inner wall of the clamp. The thrust of the pipe end overcomes the locking force of the spring and opens the three clamps. The pipe can then pass through the channel formed by the locking device. During this process, the inner wall of the three clamps is always in contact with the surface of the pipe, which can easily scratch the surface of the pipe and greatly affect the quality of the finished product. 2. During the rolling process, the pipe will have a stringing problem. The stringing force can easily overcome the locking force of the annular spring, causing the locking device to be slightly opened, and thus unable to play a stable positioning effect on the pipe, affecting the rolling effect of the pipe, and easily causing the end face of the pipe to rupture; 3. The length of the clamp will affect the length of the entire device. At the same time, an overly long clamp will interfere with other components when the end of the hollow shaft rotates, affecting normal use, thus resulting in a shorter length of the clamp. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a feeding and locking device for a feeding trolley of a cold rolling tube mill, which can prevent the surface of the tube from being scratched, improve the rolling quality of the tube, and at the same time can stably lock and feed the tube.

[0005] To achieve the above object, the present invention provides the following technical solutions: A feeding locking device for a cold rolling mill feeding carriage comprises a machine case and a hollow shaft rotatably arranged in the machine case, and is characterized in that it also comprises a clamping plate, a locking sleeve and a locking sleeve driving assembly; The hollow shaft has at least two installation openings on the side wall along the circumferential direction; The number of the holding plates is the same as that of the mounting openings, and they are respectively installed in the respective mounting openings and can move radially along the hollow shaft. An outer guiding surface is provided on the outer side wall of the holding plate; The locking sleeve is sleeved on the hollow shaft and can axially move relative to the hollow shaft. An inner guiding surface is provided on the inner wall of the locking sleeve. When the locking sleeve moves relative to the hollow shaft, the outer guiding surface cooperates with the inner guiding surface to drive multiple holding plates to simultaneously move towards or away from the center line of the hollow shaft, thereby clamping or releasing the pipe; The locking sleeve driving assembly is connected to the locking sleeve and drives the locking sleeve to move relative to the hollow shaft.

[0006] Preferably, the outer guiding surface is divided into a clamping outer guiding surface and a releasing outer guiding surface, and the inner guiding surface is divided into a clamping inner guiding surface and a releasing inner guiding surface; During movement, the clamping outer guiding surface cooperates with the clamping inner guiding surface to press the holding plate towards the center line of the hollow shaft, and the releasing inner guiding surface cooperates with the releasing outer guiding surface to push the holding plate away from the center line of the hollow shaft.

[0007] Preferably, an outer step is provided on the outer side wall of the holding plate. One end of the outer step facing the inlet end of the hollow shaft is an inclined clamping outer guiding surface. An inner step is provided on the inner side wall of the locking sleeve. One end of the inner step facing the outlet end of the hollow shaft is an inclined clamping inner guiding surface. When the locking sleeve moves towards the outlet end side of the hollow shaft, the clamping inner guiding surface presses down the clamping outer guiding surface to make the holding plate move towards the center line of the hollow shaft.

[0008] Preferably, one end of the outer step corresponding to the outlet end of the hollow shaft is an inclined releasing outer guiding surface. A pushing plate is connected to the inner wall of the locking sleeve. One side of the pushing plate facing the inlet end of the hollow shaft is an inclined releasing inner guiding surface. When the locking sleeve moves towards the inlet end side of the hollow shaft, the releasing inner guiding surface abuts against the releasing outer guiding surface to make the holding plate move away from the center line of the hollow shaft.

[0009] Preferably, the locking sleeve driving assembly includes a connecting sleeve, a guiding sleeve, a sliding sleeve, a mounting ring, a driving frame and a driving component; A base is provided on one side of the chassis corresponding to the outlet end of the hollow shaft. The guiding sleeve is installed on the base and corresponds to the outlet end of the hollow shaft; The sliding sleeve is circumferentially limited and axially movable and is fitted in the guiding sleeve, and guiding wheels are provided on the left and right sides of the guiding sleeve; The mounting ring is axially limited and circumferentially rotatable and is installed in the sliding sleeve; One end of the connecting sleeve is connected to the locking sleeve, and the other end is connected to the mounting ring; The driving component is mounted on the base, and the driving frame is connected to the driving component and has a guiding groove that cooperates with two guiding wheels. When the driving component drives the driving frame to move up and down, the guiding groove cooperates with the guiding wheels to drive the connecting sleeve to move axially along the hollow shaft.

[0010] Preferably, the connecting sleeve has a connecting section and an extending section; The diameter of the connecting section is larger than that of the extending section, and the connecting section is in threaded fit connection with the locking sleeve; The extending section extends to the outside of the outlet end of the hollow shaft and is connected to the mounting ring; The extending section is formed by a plurality of extending pieces distributed in a circumferential manner at the end of the connecting section, and a receiving groove for receiving the extending pieces is provided on the outer side wall of the hollow shaft.

[0011] Preferably, the guiding groove is divided into an upper section and a lower section. The upper section is vertically arranged, and the lower section is inclined. The connecting sleeve is driven to move by cooperating with the guiding wheels.

[0012] Preferably, the driving frame includes a top plate and driving plates located on both sides of the top plate. The two driving plates are simultaneously located on both sides of the sliding sleeve, and the guiding groove is opened on the driving plates.

[0013] Preferably, a guiding plate for guiding the lifting movement of the driving frame is provided on the base.

[0014] Preferably, it further includes a pressing plate assembly provided on the driving frame. The pressing plate assembly includes a pressing plate group and rollers; The pressing plate group has a U-shaped positioning opening with the opening facing downwards. When the pressing plate assembly moves downwards, the U-shaped positioning opening can be clamped onto the pipe; There are a plurality of the rollers, which are arranged along the edge position of the U-shaped positioning opening. A partial rolling surface of each roller is located in the U-shaped positioning opening and contacts the pipe; When the pipe is at the highest position of the U-shaped positioning opening, the guiding wheels are located in the upper section.

[0015] The advantages of the present invention are as follows: 1. When the pipe passes through the hollow shaft, the locking sleeve remains in the initial position. The releasing inner guiding surface on the pushing plate abuts against the releasing outer guiding surface on the clamping plate, so that the clamping plate is kept at a position away from the center line of the hollow shaft. Therefore, the pipe will not contact the clamping plate, avoiding the problem of scratching the surface of the pipe. At the same time, the thrust required for the pushing trolley in the pipe loading mechanism can also be reduced. When the pipe loading is completed, the locking sleeve driving component drives the locking sleeve to move towards the outlet end side of the hollow shaft. The locking sleeve presses the clamping plate towards the center line of the hollow shaft, so that the inner surfaces of multiple clamping plates simultaneously abut against the outer surface of the pipe to clamp the pipe, thereby realizing the rotational feeding of the pipe; 2. The clamping plate is floatingly arranged in the mounting opening on the side wall of the hollow shaft, so that the length of the clamping plate coincides with the axial length of the hollow shaft, which will not affect the length of the entire device and will not affect the use of the locking device. Secondly, the floating structure occupies relatively little space when moving in the mounting opening. Therefore, the length of the clamping plate can be increased, which can improve the stability of clamping the pipe, especially for pipes with a larger diameter. 3. The U-shaped positioning opening of the pressing plate assembly is stuck on the pipe, which can position the pipe. When the pipe is cold-rolled, the crosstalk generated by the pipe is first transmitted to the pressing plate assembly, so that most of the force is buffered by the pressing plate assembly and the oil cylinder. Description of the Drawings

[0016] Figure 1 It is a cross-sectional view of the feeding and locking device of the feeding trolley of the cold rolling tube mill provided by this embodiment; Figure 2 It is a front view of the feeding and locking device of the feeding trolley of the cold rolling tube mill provided by this embodiment; Figure 3 It is a cross-sectional view of the cooperation between the locking sleeve and the clamping plate provided by this embodiment; Figure 4 It is an exploded view of the hollow shaft, clamping plate, locking sleeve and connecting sleeve provided by this embodiment; Figure 5 It is a front view of the pressing plate assembly provided by this embodiment; Figure 6 It is a schematic diagram of the driving plate provided by this embodiment; Figure 7 It is a cross-sectional view of the cooperation structure between the locking sleeve, connecting sleeve, mounting ring, thrust bearing, sliding ring and guide sleeve provided by this embodiment.

[0017] Description of the Reference Numerals: 1. Chassis; 2. Bearing; 3. Hollow shaft; 31. Inlet end; 32. Outlet end; 33. Connecting flange; 35. Accommodating groove; 36. Mounting opening; 4. Clamping plate; 40. Outer step; 401. Locking outer plane; 41. Outer guiding surface; 411. Clamping outer guiding surface; 412. Loosening outer guiding surface; 5. Locking sleeve; 50. Inner step; 501. Locking inner plane; 51. Inner guiding surface; 511. Clamping inner guiding surface; 512. Loosening inner guiding surface; 6. Lock sleeve drive assembly; 61. Oil cylinder; 62. Drive frame; 622. Drive plate; 623. Top plate; 621. Guide groove; 6211. Upper section; 6212. Lower section; 6213. Lower groove wall; 6214. Upper groove wall; 63. Guide sleeve; 64. Sliding sleeve; 641. Guide wheel; 65. Thrust bearing; 66. Mounting ring; 67. Connecting sleeve; 671. Connecting section; 672. Extension piece; 673. Connecting section; 7. Base; 71. Guide plate; 72. Mounting hole; 8. Press plate assembly; 81. Press plate; 82. Roller; 83. U-shaped positioning port; 831. Partial rolling surface; 9. Pusher plate; 10. Pipe. Detailed implementation mode

[0018] Combined with Figures 1 to 7 Make a further description of the feeding and locking device of the feeding trolley of the cold rolling tube mill of the present invention.

[0019] A feeding and locking device for a feeding trolley of a cold rolling tube mill, including a machine case 1 and a hollow shaft 3 rotatably arranged in the machine case 1 through a plurality of bearings 2, characterized in that: it further includes a clamping plate 4, a lock sleeve 5 and a lock sleeve drive assembly 6.

[0020] At least two mounting openings 36 are provided on the circumferential side wall of the hollow shaft 3 along the circumferential direction. In this embodiment, three uniformly distributed mounting openings 36 are provided.

[0021] The number of the clamping plates 4 is the same as that of the mounting openings 36, which is three, and they are respectively installed in the three mounting openings and can move radially along the hollow shaft 3. The clamping plate 4 is of an arc structure, and the center line of the clamping plate 4 is parallel to the center line of the hollow shaft 3. When the three clamping plates 4 all move towards the center line direction of the hollow shaft 3, the inner surfaces of the three clamping plates 4 can form a clamping channel to clamp the pipe 10. An outer guiding surface 41 is provided on the outer side wall of the clamping plate 4.

[0022] The lock sleeve 5 is sleeved on the hollow shaft 3. A guide groove extending axially is provided between the inner wall of the lock sleeve 5 and the outer wall of the hollow shaft 3, and a guide pin cooperating with the guide groove is provided. Therefore, the lock sleeve 5 can move axially relative to the hollow shaft 3 and cannot rotate circumferentially relative to the hollow shaft 3. An inner guiding surface 51 is provided on the inner wall of the lock sleeve 5. When the lock sleeve 5 moves relative to the hollow shaft 3, the outer guiding surface 41 cooperates with the inner guiding surface 51 to drive the three clamping plates 4 to move towards or away from the center line of the hollow shaft 3 at the same time, clamping or releasing the pipe 10.

[0023] The lock sleeve drive assembly 6 is connected to the lock sleeve 5 to drive the lock sleeve 5 to move relative to the hollow shaft 3.

[0024] Such as Figure 3 、4 As shown, the outer guiding surface 41 is divided into a clamping outer guiding surface 411 and a releasing outer guiding surface 412, and the inner guiding surface 51 is divided into a clamping inner guiding surface 511 and a releasing inner guiding surface 512. When the lock sleeve 5 moves towards the outlet end 32 of the hollow shaft 3, i.e., moves leftward as shown in Figure 3 the figure, the clamping outer guiding surface 411 cooperates with the clamping inner guiding surface 511 to press the clamping plate 4 towards the center line of the hollow shaft 3; when the lock sleeve 5 moves towards the inlet end 31 of the hollow shaft 3, i.e., moves rightward as shown in Figure 3 the figure, the releasing inner guiding surface 512 cooperates with the releasing outer guiding surface 412 to push the clamping plate 4 away from the center line of the hollow shaft 3.

[0025] On the outer side wall of the clamping plate 4, there is an outer step 40 protruding from the outer side wall of the clamping plate 4. In this embodiment, there are two outer steps 40, arranged along the axial direction of the clamping plate 4. One end of the outer step facing the inlet end 31 of the hollow shaft 3 is the inclined clamping outer guiding surface 411, and the top surface of the outer step is a plane, which is the locking outer plane 401. On the inner side wall of the lock sleeve 5, there is an inner step 50 protruding from the inner side wall of the lock sleeve 5. Correspondingly, there are also two inner steps 50. One end of the inner step 50 facing the outlet end 32 of the hollow shaft 3 is the inclined clamping inner guiding surface 511, and the top surface of this inner step 50 is also a plane, which is the locking inner plane 501. When the lock sleeve 5 moves towards the outlet end 32 side of the hollow shaft 3, the clamping inner guiding surface 511 presses down the clamping outer guiding surface 411 to make the clamping plate 4 move towards the center line of the hollow shaft 3. Finally, the locking inner plane 501 of the inner step 50 presses against the locking outer plane 401 of the outer step to achieve stable positioning.

[0026] For the outer step 40 corresponding to the inlet end 31 side of the hollow shaft 3, one end of this outer step corresponding to the outlet end 32 of the hollow shaft 3 is the inclined releasing outer guiding surface 412. On the inner wall of the lock sleeve 5, a push plate 9 is connected. One end of the push plate 9 facing the inlet end 31 of the hollow shaft 3 is the inclined releasing inner guiding surface 512. When the lock sleeve 5 moves towards the inlet end 31 side of the hollow shaft 3, the releasing inner guiding surface 512 abuts against the releasing outer guiding surface 412 to make the clamping plate 4 move away from the center line of the hollow shaft 3.

[0027] There are three push plates 9, respectively corresponding to and cooperating with the releasing outer guiding surfaces 412 on the three clamping plates 4.

[0028] The push plate 9 is of an L-shaped structure, and the bottom plate of the push plate 9 is fixed on the end surface of the inner step 50 facing the inlet end 31 of the hollow shaft 3 by bolts or welding.

[0029] As shown in Figure 1 and 7 the figure, in the structure of the lock sleeve driving assembly 6, it includes a connecting sleeve 67, a guiding sleeve 63, a sliding sleeve 64, an installation ring 66, a driving frame 62 and a driving component.

[0030] On one side of the chassis 1 corresponding to the outlet end 32 of the hollow shaft 3, a base 7 is bolted. There is an oblong mounting hole 72 on the base 7. The guide sleeve 63 is fixed at a position near the bottom of the mounting hole 72 of the base 7 by means of bolt connection and corresponds to the outlet end 32 of the hollow shaft 3. The sliding sleeve 64 is circumferentially limited and axially movable and fitted in the guide sleeve 63. One end of the sliding sleeve 64 facing away from the hollow shaft 3 is located outside the guide sleeve 63, and guide wheels 641 are provided on the left and right sides of this end. A keyway mating structure is provided between the outer wall of the sliding sleeve 64 and the inner wall of the guide sleeve 63, enabling the sliding sleeve 64 to axially move in the guide sleeve 63 and be circumferentially limited. The mounting ring 66 is axially limited and circumferentially rotatably mounted in the sliding sleeve 64, that is, the mounting ring 66 is mounted in the sliding sleeve 64 through a thrust bearing 65. One end of the connecting sleeve 67 is connected to the locking sleeve 5, and the other end is connected to the mounting ring 66. The driving component is an oil cylinder 61, which is installed in an inverted state on the top of the base 7. The driving frame 62 is connected to the piston rod of the oil cylinder 61 and has a guide groove 621 that cooperates with the two guide wheels 641. When the oil cylinder 61 drives the driving frame 62 to move up and down, the guide groove 621 cooperates with the guide wheels 641 to drive the connecting sleeve 67 to axially move along the hollow shaft 3, thereby driving the locking sleeve 5 to axially move.

[0031] As Figure 4 shown, the connecting sleeve 67 is made of steel material and has a connecting section 671 and an extension section.

[0032] The diameter of the connecting section 671 is larger than that of the extension section, and the connecting section 671 is threadedly mated and connected to one end of the locking sleeve 5 facing the outlet end 32 of the hollow shaft 3 for easy disassembly and assembly.

[0033] The extension section extends to the outside of the outlet end 32 of the hollow shaft 3 and extends into the mounting ring 66, and is connected to the inner wall of the mounting ring 66 by rivets, enabling the mounting ring 66, the connecting sleeve 67, and the locking sleeve 5 to act synchronously.

[0034] The extension section is formed by three extension pieces 672 distributed in a circular pattern at the end of the connecting section 671. The extension pieces 672 are connected to the connecting section 671 through an engagement section 673 formed by bending the ends of the extension pieces 672. Correspondingly, on the outer wall of the hollow shaft 3, there is a receiving groove 35 for receiving the extension pieces 672. The thickness of the extension pieces 672 is less than the depth of the receiving groove 35, so that the top of the extension pieces 672 does not protrude from the outer surface of the hollow shaft 3, and thus does not interfere with the installation of the bearing 2 and the connecting flange 33.

[0035] As Figure 2As shown, in the structure of the driving frame 62, the driving frame 62 as a whole is a U-shaped structure with an opening downward, including a top plate 623 and driving plates 622 located on both sides of the top plate 623. The top of the top plate 623 is connected to the piston rod of the oil cylinder 61. The two driving plates 622 are located on both sides of the sliding sleeve 64. The guiding groove 621 is formed on the driving plate 622 for the guiding wheels 641 on both sides of the guiding sleeve 63 to pass through and be guided.

[0036] As Figure 1 , 6 shown, the guiding groove 621 is divided into an upper section 6211 and a lower section 6212 which are connected up and down. The upper section 6211 is vertically arranged for transitional purposes, and the lower section 6212 is inclined for guiding purposes. The lower section 6212 drives the sliding sleeve 64, the connecting sleeve 67 and the locking sleeve 5 through cooperation with the guiding wheels 641.

[0037] The outer guiding surface 41, the inner guiding surface 51 and the lower section 6212 have the same inclination angle, which is 45°. In actual use, this angle can also be set according to requirements. During the tightening process, the driving plate 622 moves downward, so that the guiding wheel 641 moves to the highest point of the lower section 6212 or into the upper section 6211 under the guiding of the groove wall 6214 of the lower section 6212. At the same time, the tightening inner guiding surface 511 of the tightening plate 4 completely passes through the tightening outer guiding surface 411, and the locking inner plane 501 of the inner step 50 presses against the locking outer plane 401 of the outer step 40, so that the three tightening plates 4 are kept in the tightened state; during the loosening process, the driving plate 622 moves upward, so that the guiding wheel 641 moves to the lowest point of the lower section 6212 under the guiding action of the lower groove wall 6213 of the lower section 6212. At the same time, the loosening inner guiding surface 512 on the push plate 9 also moves from the high point to the low point of the loosening outer guiding surface 412, pushing up the tightening plate 4 and keeping the tightening plate 4 in the loosened state.

[0038] As Figure 2 shown, on the base 7, there are guiding plates 71 for guiding the lifting and moving of the driving frame 62. There are two guiding plates 71, which are respectively located outside the two driving plates 622 for the outer side walls of the driving plates 622 to lean against and be guided, so as to improve the stability of the up and down movement of the driving plate 622 and the stability of driving the guiding sleeve 63, the connecting sleeve 67 and the locking sleeve 5.

[0039] On the side of the guiding plate 71 facing the driving plate 622, there is a guiding groove for the cooperation of the driving plate.

[0040] As Figure 1 , 2 shown in Figure 5, this locking device further includes a pressing plate assembly 8 arranged on the driving frame 62. The pressing plate assembly 8 includes a pressing plate group and rollers 82.

[0041] The pressing plate group is provided with a U-shaped positioning opening 83 with an opening facing downwards. When the pressing plate assembly 8 moves downwards, the U-shaped positioning opening 83 can be clamped onto the pipe 10 to limit the pipe 10 in multiple directions and reduce the situation of the pipe 10 moving longitudinally. A plurality of rollers 82 are provided and arranged along the edge position of the U-shaped positioning opening 83. A partial rolling surface 831 of each roller 82 is located in the U-shaped positioning opening 83 to avoid the problem that the pipe 10 directly contacts the pressing plate group and causes scratches.

[0042] The pressing plate group includes two front and rear parallel pressing plates 81 that are fixedly connected by bolts. Edge plates are provided at the edge positions of the two pressing plates 81 to further position the two pressing plates 81. Both ends of each roller 82 are respectively inserted into the grooves on the inner side walls of the two pressing plates 81, so that the roller 82 is positioned between the two pressing plates 81. The pressing plate assembly 8 is located between the hollow shaft 3 and the cold rolling mill. The U-shaped positioning opening 83 on the pressing plate assembly 8 is clamped onto the pipe 10, and the rollers on the feeding conveyor bed can limit the pipe 10 in all directions, that is, it can limit or reduce the situation of the pipe 10 moving upwards or moving left and right. At the same time, the force borne by the pressing plate assembly 8 can be buffered by the oil cylinder 61, so that the clamping plate 4 on the hollow shaft 3 can firmly clamp the pipe 10.

[0043] When the pipe 10 is at the highest position of the U-shaped positioning opening 83, the guide wheel 641 is located in the upper section 6211, which is convenient for the adaptive adjustment of the guide wheel 641 in the upper section 6211.

[0044] During the specific use process, in the initial state, the oil cylinder 61 drives the driving plate 622 to remain in the upward movement state, so that the guide wheel 641 is located at the lowest point of the lower section 6212 of the guide groove 621. The release inner guide surface 512 abuts against the lowest point of the release outer guide surface 412, and the clamping plate 4 remains at a position away from the center line of the hollow shaft 3, that is, the clamping opening is in an open state. In this state, when the pipe 10 passes through, it will not contact the inner surface of the clamping plate 4, avoiding the problem of the surface of the pipe 10 being worn and also reducing the thrust required for the loading trolley in the loading mechanism; After the loading is completed, the oil cylinder 61 drives the driving plate 622 to move downwards, so that the guide wheel 641 moves from the lower section 6212 to the upper section 6211. During this process, the sliding sleeve 64 moves away from the hollow shaft 3 side, and at the same time pulls the mounting ring 66, the connecting sleeve 67, and the locking sleeve 5. The clamping plate 4 moves towards the center of the hollow shaft 3 under the cooperation of the clamping inner guide surface 511 and the clamping outer guide surface 411, realizing the clamping of the clamping opening and clamping the pipe 10 tightly.

[0045] Meanwhile, the pressing plate assembly 8 descends synchronously with the driving frame 62. The U-shaped positioning opening 83 on the pressing plate assembly 8 is engaged with the pipe 10 to limit the pipe 10 in multiple directions, avoiding or reducing the crosstalk amplitude of the pipe 10 during the cold rolling process, improving the stability of the clamping plate 4 in clamping the pipe 10, and the stability of the whole trolley in feeding the pipe 10.

[0046] After the feeding is completed, the oil cylinder 61 moves upward to drive the clamping plate 4 to reset, and then the next cycle operation can be carried out.

[0047] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and retouches made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A feeding locking device for a cold rolling mill feeding carriage, comprising a casing (1) and a hollow shaft (3) rotatably arranged in the casing (1), wherein: It also includes a clamping plate (4), a locking sleeve (5) and a locking sleeve driving assembly (6); The hollow shaft (3) has at least two installation openings (36) formed on a side wall along a circumferential direction; The number of the clamping plates (4) is the same as the number of the mounting openings (36), and the clamping plates (4) are respectively mounted in the mounting openings (36) and are movable in the radial direction of the hollow shaft (3). The outer side wall of the clamping plates (4) is provided with an outer guide surface (41); The locking sleeve (5) is sleeved on the hollow shaft (3) and can move axially relative to the hollow shaft (3). An inner guide surface (51) is provided on the inner wall of the locking sleeve (5). When the locking sleeve (5) moves relative to the hollow shaft (3), the outer guide surface (41) cooperates with the inner guide surface (51) to drive the plurality of clamping plates (4) to move toward or away from the center line of the hollow shaft (3) at the same time, thereby clamping or loosening the pipe (10); The lock sleeve drive assembly (6) is connected to the lock sleeve (5) and drives the lock sleeve (5) to move relative to the hollow shaft (3).

2. The cold rolling mill feeding trolley feeding locking device according to claim 1 is characterized in that: The outer guide surface (41) is divided into a clamping outer guide surface (411) and a loosening outer guide surface (412), and the inner guide surface (51) is divided into a clamping inner guide surface (511) and a loosening inner guide surface (512); During movement, the clamping outer guide surface (411) cooperates with the clamping inner guide surface (511) to press the clamping plate (4) toward the center line of the hollow shaft (3), and the loosening inner guide surface (512) cooperates with the loosening outer guide surface (412) to push the clamping plate (4) away from the center line of the hollow shaft (3).

3. The feeding locking device for the feeding carriage of the cold rolling mill according to claim 2 is characterized in that: An outer wall of the clamping plate (4) is provided with an outer step (40), and one end of the outer step facing the inlet end (31) of the hollow shaft (3) is an inclined clamping outer guide surface (411). An inner wall of the locking sleeve (5) is provided with an inner step (50), and one end of the inner step (50) facing the outlet end (32) of the hollow shaft (3) is an inclined clamping inner guide surface (511). When the locking sleeve (5) moves toward the outlet end (32) of the hollow shaft (3), the clamping inner guide surface (511) presses down the clamping outer guide surface (411) to move the clamping plate (4) toward the center line of the hollow shaft (3).

4. The feeding locking device for the feeding carriage of the cold rolling mill according to claim 3 is characterized in that: One end of the outer step corresponding to the outlet end (32) of the hollow shaft (3) is an inclined loosening outer guide surface (412), and a push plate (9) is connected to the inner wall of the locking sleeve (5). The side of the push plate (9) facing the inlet end (31) of the hollow shaft (3) is an inclined loosening inner guide surface (512). When the locking sleeve (5) moves toward the inlet end (31) of the hollow shaft (3), the loosening inner guide surface (512) presses against the loosening outer guide surface (412) to move the clamping plate (4) away from the center line of the hollow shaft (3).

5. The feeding locking device for the feeding carriage of the cold rolling mill according to claim 1 is characterized in that: The lock sleeve drive assembly (6) comprises a connecting sleeve (67), a guide sleeve (63), a sliding sleeve (64), a mounting ring (66), a drive frame (62) and a drive component; A base (7) is provided on a side of the chassis (1) corresponding to the outlet end (32) of the hollow shaft (3), and the guide sleeve (63) is mounted on the base (7) and corresponds to the outlet end (32) of the hollow shaft (3); The sliding sleeve (64) is circumferentially limited and axially movable in the guide sleeve (63), and has guide wheels (641) on the left and right sides of the guide sleeve (63); The mounting ring (66) is axially limited and circumferentially rotatably mounted in the sliding sleeve (64); One end of the connecting sleeve (67) is connected to the locking sleeve (5), and the other end is connected to the mounting ring (66); The driving component is mounted on the base (7), the driving frame (62) is connected to the driving component and has a guide groove (621) that cooperates with two guide wheels (641), and when the driving component drives the driving frame (62) to move up and down, the guide groove (621) cooperates with the guide wheel (641) to drive the connecting sleeve (67) to move axially along the hollow shaft (3).

6. The feeding locking device for the feeding carriage of the cold rolling mill according to claim 5 is characterized in that: The connecting sleeve (67) comprises a connecting section (671) and an extending section; The diameter of the connecting section (671) is greater than the diameter of the extending section, and the connecting section (671) is thread-matchedly connected to the locking sleeve (5); The extension section extends to the outside of the outlet end (32) of the hollow shaft (3) and is connected to the mounting ring (66); The extension section is formed by a plurality of circumferentially distributed extension pieces (672) formed at the end of the connection section (671), and a receiving groove (35) for receiving the extension piece (672) is provided on the outer side wall of the hollow shaft (3).

7. The feeding locking device for the feeding carriage of the cold rolling mill according to claim 5 is characterized in that: The guide groove (621) is divided into an upper section (6211) and a lower section (6212); the upper section (6211) is vertically arranged, and the lower section (6212) is inclined, and cooperates with the guide wheel (641) to drive the connecting sleeve (67) to move.

8. The cold rolling mill feeding trolley feeding locking device according to claim 5 is characterized in that: The driving frame (62) comprises a top plate (623) and driving plates (622) located on both sides of the top plate (623). The two driving plates (622) are located on both sides of the sliding sleeve (64) at the same time. The guide groove (621) is formed on the driving plate (622).

9. The feeding locking device for the feeding carriage of the cold rolling mill according to claim 5 is characterized in that: A guide plate (71) is provided on the base (7) for guiding the driving frame (62) when it moves up and down.

10. The feeding locking device for the feeding carriage of the cold rolling mill according to claim 5 is characterized in that: Also included is a pressure plate assembly (8) disposed on the driving frame (62), the pressure plate assembly (8) comprising a pressure plate group and a roller (82); A U-shaped positioning opening (83) opening downward is provided on the pressing plate assembly, and when the pressing plate assembly (8) moves downward, the U-shaped positioning opening (83) can be clamped onto the pipe (10); There are a plurality of rollers (82) arranged along the edge of the U-shaped positioning opening (83); a partial rolling surface of each roller (82) is located in the U-shaped positioning opening (83) and in contact with the pipe (10); When the pipe (10) is located at the highest position of the U-shaped positioning opening (83), the guide wheel (641) is located in the upper section (6211).

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