Plunger assembly clamping height adjusting mechanism for spinning necking machine

Abstract

The utility model relates to the technical field of plunger assembly necking devices, in particular to a plunger assembly clamping height adjusting mechanism for a spinning necking machine, which comprises a rack, a chuck mechanism arranged on the rack, a clamping mechanism arranged in the chuck mechanism, a sliding table assembly and a sliding table driving mechanism. The clamping mechanism comprises an elastic collet provided with a plunger assembly and an ejector rod arranged below the elastic collet. The sliding table assembly comprises a moving block connected with the ejector rod, the moving block is transversely arranged in an inclined notch formed in a sliding seat in a penetrating mode, the sliding seat is fixed to the upper portion of a dovetail sliding block, the dovetail sliding block is connected with a dovetail guide seat in a sliding mode, and the dovetail guide seat is fixedly connected with the machine frame. The sliding table driving mechanism comprises a servo motor, a lead screw and a nut piece which is arranged outside the lead screw in a sleeving mode and fixedly connected with the sliding base. According to the spinning necking-in machine, the clamping function and the accurate position adjusting function are combined, the elastic collet chuck has enough rigidity when bearing axial force, and the technical problem that the clamping height of an existing spinning necking-in machine cannot be freely and accurately adjusted can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger assembly closing devices, in particular to a plunger assembly clamping height adjustment mechanism for a spinning closing machine. Background Art

[0002] The plunger pump is widely used in hydraulic presses, engineering machinery, agricultural machinery, ships and other industries due to its compact structure, small volume per unit power, light weight, high working pressure, high efficiency and convenient adjustment. The plunger assembly is the core component of the plunger pump, including the plunger and the sliding shoe. Before the plunger assembly is installed on the plunger pump, the plunger sliding shoe must be closed to achieve a ball joint connection.

[0003] There are two main ways to close the plunger assembly: mold closing and rolling wheel spinning closing. The traditional spinning closing machine clamps the plunger assembly through the chuck center clamping mechanism, but the clamping height of the plunger assembly is a fixed position and cannot be freely and accurately set. It cannot meet the height position requirements of different models of plunger assemblies when closing. If the clamping height of the plunger assembly needs to be adjusted, it is necessary to make multiple sets of chucks with different clamping depths, which has high manufacturing cost, long cycle and low replacement efficiency. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a plunger assembly clamping height adjustment mechanism for a spinning and closing machine, which has a sophisticated structure and a small space volume, combines the clamping function with the precise position adjustment function, and the elastic collet has sufficient rigidity when subjected to axial force, meeting the rigidity requirements of the plunger assembly during the closing process that requires frequent testing of different heights. The utility model can effectively solve the technical problem that the existing spinning and closing machine cannot freely and accurately adjust the clamping height.

[0005] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0006] In one technical solution of the utility model, a plunger assembly clamping height adjustment mechanism for a spinning and closing machine is provided, comprising a frame, a hollow chuck mechanism connected to the frame, a clamping mechanism sleeved in the inner cavity of the chuck mechanism, a slide assembly connected to the bottom of the clamping mechanism, and a slide drive mechanism connected to the slide assembly;

[0007] The clamping mechanism comprises an elastic collet and a push rod connected to the bottom of the elastic collet, and a plunger assembly is inserted into the interior of the elastic collet;

[0008] The slide assembly includes a moving block, a sliding seat, a dovetail slider and a dovetail guide seat, the bottom of the push rod is fixedly connected to the moving block, the sliding seat is provided with an oblique slot, the moving block is transversely inserted into the oblique slot, the sliding seat is fixedly connected to the top of the dovetail slider, the dovetail slider is embedded in the dovetail guide seat and can slide along the dovetail guide seat, and the dovetail guide seat is fixedly connected to the frame;

[0009] The slide drive mechanism includes a servo motor, a screw connected to the output shaft of the servo motor and rotating synchronously, and a nut member sleeved on the outside of the screw and meshingly connected to the screw. The servo motor is fixedly connected to the frame, and both ends of the screw are connected to the frame through a screw mounting seat. The nut member is fixedly connected to the sliding seat.

[0010] By adopting the above technical solution, the clamping plunger assembly is installed through the clamping mechanism, and the lead screw is driven to rotate by the servo motor, driving the nut and the sliding seat to move forward and backward along the axial direction of the lead screw. At this time, the moving block and the oblique notch of the sliding seat move relative to each other, so that the height position of the moving block in the vertical direction can be adjusted, and the clamping mechanism is driven up and down by the moving block to adjust the clamping height of the plunger assembly to adapt to plunger assemblies of different models and sizes for closing processing. By setting the dovetail slider to slide along the dovetail guide seat, the stability and load performance of the sliding seat moving along the lead screw can be improved.

[0011] Furthermore, the frame is provided with a collet chuck mechanism, which comprises a connecting rod driving mechanism, a sleeve connecting rod and a small sleeve connected in sequence, the sleeve connecting rod is sleeved on the outside of the top rod, the small sleeve is fixed to the top of the sleeve connecting rod and sleeved on the outside of the elastic collet, and the inner diameter of the small sleeve is not greater than the outer diameter of the elastic collet;

[0012] The connecting rod driving mechanism includes a cylinder, a cylinder connecting rod and a connecting top plate. The cylinder is fixed under the frame. The output shaft of the cylinder is connected to the cylinder connecting rod and is synchronously linked. The top end of the cylinder connecting rod is fixedly connected to the connecting top plate, and the connecting top plate is fixedly connected to the sleeve connecting rod. The connecting top plate is located above the sliding seat.

[0013] The cylinder drives the connecting top plate to move up and down in the vertical direction, driving the sleeve connecting rod and the small sleeve to move up and down together, thereby realizing the relative movement between the sleeve connecting rod and the small sleeve and the clamping mechanism, so that the elastic collet can be closed or opened. When the clamping mechanism holding the plunger assembly is adjusted to a specified height position, the cylinder drives the sleeve connecting rod and the small sleeve to move upward, and the elastic collet is closed inside the small sleeve. A number of through grooves are provided on the side walls around the upper part of the elastic collet. When the small sleeve moves upward, the side walls of the elastic collet are subjected to radial inward pressure to close inward and clamp the plunger assembly, thereby ensuring the stability of the position of the plunger assembly during the spinning process and ensuring the quality of the spinning.

[0014] Furthermore, four vertically arranged guide rods are connected to the bottom of the connecting top plate, the guide rods penetrate the connecting frame and are sleeved with guide bearings between the frames, and the bottoms of the four guide rods are fixedly connected to a connecting bottom plate, which is located below the cylinder. The guide rods can improve the stability of the process of the cylinder driving the connecting top plate to move up and down.

[0015] Furthermore, a clamping block is provided on the outer ring of the bottom of the sleeve connecting rod, and the clamping block is fixedly connected to the connecting top plate. The sleeve connecting rod and the connecting top plate are detachably connected, and the clamping and fixing between the two is realized by the clamping block.

[0016] Furthermore, a damping buffer is connected below the connecting top plate, and the bottom of the damping buffer is fixedly connected to the frame, so as to play a role of buffering and shock absorption in the process of the cylinder driving the connecting top plate to move downward.

[0017] Furthermore, a dovetail protrusion is provided at the bottom of the dovetail slider, and a dovetail groove is provided at the upper part of the dovetail guide seat. The shapes of the dovetail protrusion and the dovetail groove match each other, and the dovetail protrusion is embedded in the dovetail groove to achieve a movable connection between the dovetail slider and the dovetail guide seat. This structural design can significantly improve the structural rigidity and load capacity of the slide assembly and extend its service life.

[0018] Furthermore, the frame includes an upper fixed plate, a lower fixed plate and four support columns, the upper and lower ends of the support columns are respectively fixedly connected to the upper fixed plate and the lower fixed plate, the chuck mechanism is passed through the upper fixed plate, the dovetail guide seat and the servo motor are both fixed above the lower fixed plate, and the cylinder is fixed below the lower fixed plate.

[0019] Furthermore, the chuck mechanism comprises a coaxially mounted rear chuck, a chuck spindle and a chuck bearing seat, the rear chuck is provided with at least two movable jaws distributed at equal intervals along the circumference, and a rolling wheel mechanism is fixedly mounted on each movable jaw;

[0020] The chuck bearing seat is sleeved in the upper fixed plate and fixed thereto, the chuck main shaft is sleeved in the chuck bearing seat, the upper part of the chuck main shaft is fixedly connected to the rear pulley, and the lower part of the chuck main shaft is fixedly connected to a synchronous pulley, and a three-phase asynchronous motor is provided on the side of the frame, and the output shaft of the three-phase asynchronous motor is connected to the synchronous pulley through a synchronous belt drive.

[0021] The three-phase asynchronous motor drives the synchronous pulley to rotate around its own axis, and at the same time drives the chuck main shaft and the rear pull chuck to rotate synchronously. At the same time, it drives the rolling wheel mechanism to rotate circumferentially around the plunger assembly, and spins and closes the edge of the sliding shoe, so that the ball socket of the sliding shoe and the ball head of the plunger are tightly enclosed.

[0022] Furthermore, a ball bearing is sleeved between the chuck bearing seat and the chuck main shaft to reduce the friction of the chuck main shaft during rotation inside the chuck bearing seat and improve the flexibility of rotation. A limit sleeve is sleeved between the small sleeve and the rear pull chuck to play a role in limiting and structural support.

[0023] Furthermore, the rolling wheel mechanism includes a cutter head and a rolling wheel body, the cutter head is fixedly connected to the movable claw, and the rolling wheel body is arranged at one end of the cutter head close to the plunger assembly for spinning and closing the plunger assembly.

[0024] The beneficial effects of the utility model are as follows:

[0025] The utility model clamps the plunger assembly by setting a clamping mechanism, drives the screw to rotate by a servo motor, drives the nut and the sliding seat to move forward and backward along the axial direction of the screw, and the dovetail slider slides along the dovetail guide seat. At this time, the moving block and the oblique notch of the sliding seat move relative to each other, so that the height position of the moving block in the vertical direction can be adjusted, and the clamping mechanism is driven up and down by the moving block to adjust the clamping height of the plunger assembly to adapt to plunger assemblies of different models and sizes for closing processing. When the clamping mechanism holding the plunger assembly is adjusted to a specified height position, the cylinder is set to drive the sleeve connecting rod and the small sleeve to move upward, and the elastic collet is closed inside the small sleeve. The side wall of the elastic collet is subjected to radial inward pressure to close inwardly clamp the plunger assembly, thereby ensuring the stability of the position of the plunger assembly during the spinning closing process and ensuring the quality of the spinning closing. When the closing is completed, the cylinder drives the sleeve connecting rod and the small sleeve to move downward, so that the elastic collet extends out of the small sleeve and opens outward to release the plunger assembly, and the plunger assembly that has been closed can be manually taken out. The utility model combines the clamping function with the precise position adjustment function, and the elastic collet has sufficient rigidity when subjected to axial force, which meets the rigidity requirements of frequent tests of different heights during the closing process of the plunger assembly. In conjunction with the chuck mechanism, the CNC spinning of the plunger assembly can be completed to close the plunger assembly, correct the contour and control the axial clearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a three-dimensional structural schematic diagram of a clamping height adjustment mechanism of a plunger assembly for a spinning and closing machine;

[0028] Figure 2 yes Figure 1 A partial enlarged view of the area “A” in the middle;

[0029] Figure 3 It is a schematic diagram of the internal structure of the plunger assembly clamping height adjustment mechanism for the spinning and closing machine after sectioning;

[0030] Figure 4 yes Figure 3 A partial enlarged view of the area "B" in the middle;

[0031] Figure 5 It is another three-dimensional structural schematic diagram of the clamping height adjustment mechanism of the plunger assembly for the spinning and closing machine;

[0032] Figure 6 It is a left view of the clamping height adjustment mechanism of the plunger assembly for the spinning and closing machine;

[0033] Figure 7 It is a front view of the clamping height adjustment mechanism of the plunger assembly for the spinning and closing machine;

[0034] Figure 8 yes Figure 7 Schematic diagram of the cross section along the "CC" line;

[0035] Fig. 9 It is a three-dimensional structural schematic diagram of the collet chuck mechanism in the utility model;

[0036] Fig.10 It is a three-dimensional structural schematic diagram of the slide assembly and the slide drive mechanism in the utility model.

[0037] Description of the numbers in the figure:

[0038] 1. Frame; 11. Upper fixing plate; 12. Lower fixing plate; 13. Support column;

[0039] 2. Chuck mechanism; 21. Pull-back chuck; 211. Movable claw; 22. Chuck spindle; 23. Chuck bearing seat; 24. Ball bearing; 25. Synchronous pulley; 26. Synchronous belt; 27. Limit sleeve; 28. Bearing end cover; 29. ​​Locking piece;

[0040] 3. Clamping mechanism; 31. Elastic collet; 311. Through slot; 32. Ejector rod;

[0041] 4. Slide assembly; 41. Moving block; 42. Sliding seat; 43. Dovetail slider; 431. Dovetail protrusion; 44. Dovetail guide seat; 441. Dovetail groove; 45. Oblique notch;

[0042] 5. Slide drive mechanism; 51. Servo motor; 52. Screw; 53. Nut; 54. Screw mounting seat;

[0043] 6. Collet chuck mechanism; 61. Connecting rod driving mechanism; 611. Cylinder; 612. Cylinder connecting rod; 613. Connecting top plate; 614. Guide rod; 615. Guide bearing; 616. Block; 617. Damping buffer; 618. Connecting bottom plate; 62. Sleeve connecting rod; 63. Small sleeve; 64. Oil-free bushing;

[0044] 7. Rolling wheel mechanism; 71. Cutter head; 72. Rolling wheel body; 8. Three-phase asynchronous motor;

[0045] 100. Plunger assembly; 101. Plunger; 102. Shoe. DETAILED DESCRIPTION

[0046] The following is a specific embodiment of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, it does not mean that the features of this utility model are limited to the embodiment.

[0047] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0048] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0049] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0050] refer to Figure 1In one embodiment of the utility model, a plunger assembly clamping height adjustment mechanism for a spinning and closing machine is provided, including a frame 1, a hollow chuck mechanism 2 connected to the frame 1, a clamping mechanism 3 sleeved in the inner cavity of the chuck mechanism 2, a slide assembly 4 connected to the bottom of the clamping mechanism 3, and a slide drive mechanism 5 connected to the slide assembly 4.

[0051] Specifically, refer to Figure 1 and Figure 3 The clamping mechanism 3 includes an elastic collet 31 and a push rod 32 connected to the bottom of the elastic collet 31. A plunger assembly 100 is inserted into the elastic collet 31. Figure 4 In this embodiment, the reverse closing is taken as an example, the elastic collet 31 clamps the bottom of the sliding shoe 102, and the ball head of the plunger 101 is placed downward inside the upward ball socket of the sliding shoe 102.

[0052] refer to Figure 1 , Figure 2 and Fig.10 The slide assembly 4 includes a moving block 41, a sliding seat 42, a dovetail slider 43 and a dovetail guide seat 44. The bottom of the top rod 32 is fixedly connected to the moving block 41. The sliding seat 42 is provided with an oblique slot 45. The left and right sides of the sliding seat 42 are respectively provided with mutually parallel oblique slots 45. The oblique slots 45 are lower in front and higher in the back. The moving block 41 is transversely inserted into the oblique slots 45. Figure 6 and Figure 8 The sliding seat 42 is fixedly connected to the upper part of the dovetail slider 43, the dovetail slider 43 is embedded in the dovetail guide seat 44 and can slide along the dovetail guide seat 44, and the dovetail guide seat 44 is fixedly connected to the frame 1. The dovetail slider 43 slides along the dovetail guide seat 44, which can improve the stability and load performance of the sliding seat 42 during the movement process along the screw rod 52.

[0053] refer to Figure 1 , Figure 8 and Fig.10 The slide drive mechanism 5 includes a servo motor 51, a screw rod 52 connected to the output shaft of the servo motor 51 and rotating synchronously, and a nut member 53 sleeved on the outside of the screw rod 52 and meshingly connected with the screw rod 52. The servo motor 51 is fixedly connected to the frame 1. Both ends of the screw rod 52 are connected to the frame 1 through a screw rod mounting seat 54, and the nut member 53 is fixedly connected to the sliding seat 42. Both ends of the screw rod 52 are movably sleeved in the screw rod mounting seat 54, and the screw rod mounting seat 54 is fixedly connected to the frame 1.

[0054] The lead screw 52 is driven to rotate by the servo motor 51, driving the nut 53 and the sliding seat 42 to move forward and backward along the axial direction of the lead screw 52. At this time, relative movement occurs between the moving block 41 and the oblique slot 45 of the sliding seat 42, so that the height position of the moving block 41 in the vertical direction can be adjusted. The moving block 41 drives the clamping mechanism 3 to move up and down, thereby adjusting the clamping height of the plunger assembly 100 to adapt to plunger assemblies of different models and sizes for closing processing.

[0055] refer to Figure 3 , Figure 8 and Fig. 9 The frame 1 is provided with a collet chuck mechanism 6, which includes a connecting rod driving mechanism 61, a sleeve connecting rod 62 and a small sleeve 63 which are connected in sequence. The sleeve connecting rod 62 is sleeved on the outside of the top rod 32, and the small sleeve 63 is fixed to the top of the sleeve connecting rod 62 and sleeved on the outside of the elastic collet 31, and the inner diameter of the small sleeve 63 is not greater than the outer diameter of the elastic collet 31. Among them, the connecting rod driving mechanism 61 includes a cylinder 611, a cylinder connecting rod 612 and a connecting top plate 613, the cylinder 611 is fixed to the bottom of the frame 1, the output shaft of the cylinder 611 is connected to the cylinder connecting rod 612 and synchronously linked, the top end of the cylinder connecting rod 612 is fixedly connected to the connecting top plate 613, the connecting top plate 613 is fixedly connected to the sleeve connecting rod 62, and the connecting top plate 613 is located above the sliding seat 42.

[0056] The cylinder 611 drives the connecting top plate 613 to move up and down in the vertical direction, driving the sleeve connecting rod 62 and the small sleeve 63 to move up and down together, thereby realizing the relative movement between the sleeve connecting rod 62 and the small sleeve 63 and the clamping mechanism 3, so that the elastic collet 31 can be closed or opened. When the clamping mechanism 3 holding the plunger assembly 100 is adjusted to a specified height position, the cylinder 611 drives the sleeve connecting rod 62 and the small sleeve 63 to move upward, and the elastic collet 31 is closed inside the small sleeve 63. A plurality of through grooves 311 are provided on the side walls around the upper part of the elastic collet 31. When the small sleeve 63 moves upward, the side walls of the elastic collet 31 are subjected to radial inward pressure to close inward and clamp the plunger assembly 100, thereby ensuring the stability of the position of the plunger assembly 100 during the spinning process and ensuring the quality of the spinning.

[0057] refer to Figure 5 and Fig. 9 Four vertically arranged guide rods 614 are respectively connected to the four corners of the connecting top plate 613 to improve the stability of the process of the cylinder 611 driving the connecting top plate 613 to move up and down. The guide rods 614 penetrate the connecting frame 1 and are sleeved with guide bearings 615 to reduce the sliding friction between the guide rods 614 and the frame 1. The bottoms of the four guide rods 614 are fixedly connected to a connecting bottom plate 618, which is located below the cylinder 611.

[0058] refer to Fig. 9 The outer ring of the bottom of the sleeve connecting rod 62 is provided with a clamping block 616, and the clamping block 616 is fixedly connected to the connecting top plate 613. The sleeve connecting rod 62 and the connecting top plate 613 are detachably connected, and the clamping fixation between the two is achieved by the clamping block 616. A damping buffer 617 is also connected below the connecting top plate 613, and the bottom of the damping buffer 617 is fixedly connected to the frame 1. It plays a role of buffering and shock absorption in the process of the cylinder 611 driving the connecting top plate 613 to move downward.

[0059] refer to Figure 2 and Fig.10 The bottom of the dovetail slider 43 is provided with a dovetail protrusion 431, and the upper part of the dovetail guide seat 44 is provided with a dovetail groove 441. The dovetail protrusion 431 and the dovetail groove 441 are matched with each other in shape. The dovetail slider 43 and the dovetail guide seat 44 are movably connected by embedding the dovetail protrusion 431 in the dovetail groove 441. This structural design can significantly improve the structural rigidity and load capacity of the slide assembly 4 and extend the service life.

[0060] refer to Figures 5 to 7 The frame 1 includes an upper fixed plate 11, a lower fixed plate 12 and four support columns 13. The upper and lower ends of the support columns 13 are respectively fixedly connected to the upper fixed plate 11 and the lower fixed plate 12. The chuck mechanism 2 is penetrated through the upper fixed plate 11. The dovetail guide seat 44 and the servo motor 51 are both fixed above the lower fixed plate 12, and the cylinder 611 is fixed below the lower fixed plate 12.

[0061] like Figure 3 and Figure 7 As shown, the chuck mechanism 2 includes a coaxially mounted rear chuck 21, a chuck spindle 22 and a chuck bearing seat 23. The rear chuck 21 is provided with at least two movable claws 211 distributed at equal intervals along the circumference, and a rolling wheel mechanism 7 is fixedly mounted on each movable claw 211. Figure 7 The rolling wheel mechanism 7 includes a cutter head 71 and a rolling wheel body 72. The cutter head 71 is fixedly connected to the movable claw 211. The rolling wheel body 72 is disposed at one end of the cutter head 71 close to the plunger assembly 100, and is used to spin and close the plunger assembly 100. Figure 3 The chuck bearing seat 23 is sleeved in the upper fixed plate 11 and fixed thereto, the chuck main shaft 22 is sleeved in the chuck bearing seat 23, the upper part of the chuck main shaft 22 is fixedly connected to the rear chuck 21, and the lower part of the chuck main shaft 22 is fixedly connected to the synchronous pulley 25. Figure 6 A three-phase asynchronous motor 8 is disposed on the side of the frame 1 , and an output shaft of the three-phase asynchronous motor 8 is connected to a synchronous pulley 25 through a synchronous belt 26 .

[0062] refer to Figure 3The push rod 32 and the sleeve connecting rod 62 are inserted into the inner cavity of the chuck main shaft 22 and are arranged concentrically with the chuck main shaft 22. The elastic collet 31 and the small sleeve 63 are inserted into the inner cavity of the back-pull chuck 21 and are arranged concentrically with the back-pull chuck 21. The rolling wheel mechanism 7 is arranged around the part to be closed of the plunger assembly 100. The synchronous pulley 25 is driven by the three-phase asynchronous motor 8 to rotate around its own axis, and the chuck main shaft 22 and the back-pull chuck 21 are driven to rotate synchronously. At the same time, the rolling wheel mechanism 7 is driven to rotate circumferentially around the plunger assembly 100, and the edge of the sliding shoe 102 is spun and closed, so that the ball socket of the sliding shoe 102 and the ball head of the plunger 101 are tightly wrapped.

[0063] The rear pull chuck 21 of the present invention is also provided with a transmission mechanism (not shown in the figure) inside for driving the movable claw 211 to close or open along the radial direction of the rear pull chuck 21. The rear pull chuck 21 converts the axial movement into the radial movement of the movable claw 211 through the internal transmission mechanism, so that the movable claw 211 is clamped inward to approach the plunger assembly 100 for spinning and closing, or the movable claw 211 is opened outward to separate from the plunger assembly 100 after the closing is completed. The internal transmission mechanism of the rear pull chuck 21 adopts the existing structure, and the structural principle of this part is a relatively mature technology, which will not be repeated here.

[0064] refer to Figure 3 A ball bearing 24 is sleeved between the chuck bearing seat 23 and the chuck main shaft 22 to reduce the friction of the chuck main shaft 22 during the rotation process inside the chuck bearing seat 23 and improve the flexibility of rotation. A limiting sleeve 27 is sleeved between the small sleeve 63 and the rear pull chuck 21 to play a role of limiting and structural support. Figure 3 The bottom of the ball bearing 24 is provided with a bearing end cover 28 and a locking member 29. The bearing end cover 28 is fixed to the bottom of the chuck bearing seat 23. The locking member 29 is sleeved on the outside of the chuck main shaft 22 and fixedly connected thereto. An oil-free bushing 64 is respectively sleeved between the upper and lower ends of the push rod 32 and the sleeve connecting rod 62 to reduce the friction between the push rod 32 and the sleeve connecting rod 62 during relative movement.

[0065] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Therefore, any technical solution that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A plunger assembly clamping height adjustment mechanism for a spinning and closing machine, characterized in that: It comprises a frame (1), a hollow chuck mechanism (2) connected to the frame (1), a clamping mechanism (3) sleeved in the inner cavity of the chuck mechanism (2), a slide assembly (4) connected to the bottom of the clamping mechanism (3), and a slide driving mechanism (5) connected to the slide assembly (4); The clamping mechanism (3) comprises an elastic collet (31) and a push rod (32) connected to the bottom of the elastic collet (31), and a plunger assembly (100) is inserted into the interior of the elastic collet (31); The slide assembly (4) comprises a moving block (41), a sliding seat (42), a dovetail slider (43) and a dovetail guide seat (44); the bottom of the push rod (32) is fixedly connected to the moving block (41); an oblique slot (45) is provided on the sliding seat (42); the moving block (41) is transversely inserted into the oblique slot (45); the sliding seat (42) is fixedly connected to the top of the dovetail slider (43); the dovetail slider (43) is embedded in the dovetail guide seat (44) and can slide along the dovetail guide seat (44); the dovetail guide seat (44) is fixedly connected to the frame (1); The slide drive mechanism (5) comprises a servo motor (51), a screw rod (52) connected to an output shaft of the servo motor (51) and rotating synchronously, and a nut member (53) sleeved on the outside of the screw rod (52) and meshingly connected to the screw rod (52); the servo motor (51) is fixedly connected to the frame (1); both ends of the screw rod (52) are connected to the frame (1) via a screw rod mounting seat (54); and the nut member (53) is fixedly connected to the sliding seat (42).

2. The plunger assembly clamping height adjustment mechanism for a spinning and closing machine according to claim 1, characterized in that: The frame (1) is provided with a collet chuck mechanism (6), the collet chuck mechanism (6) comprising a connecting rod driving mechanism (61), a sleeve connecting rod (62) and a small sleeve (63) which are connected in sequence, the sleeve connecting rod (62) being sleeved on the outside of the push rod (32), the small sleeve (63) being fixed to the top of the sleeve connecting rod (62) and sleeved on the outside of the elastic collet (31), and the inner diameter of the small sleeve (63) being no greater than the outer diameter of the elastic collet (31); The connecting rod driving mechanism (61) comprises a cylinder (611), a cylinder connecting rod (612) and a connecting top plate (613); the cylinder (611) is fixed below the frame (1); the output shaft of the cylinder (611) is connected to the cylinder connecting rod (612) and is synchronously linked; the top end of the cylinder connecting rod (612) is fixedly connected to the connecting top plate (613); the connecting top plate (613) is fixedly connected to the sleeve connecting rod (62); and the connecting top plate (613) is located above the sliding seat (42).

3. The plunger assembly clamping height adjustment mechanism for a spinning and closing machine according to claim 2, characterized in that: Four vertically arranged guide rods (614) are also connected below the connecting top plate (613); the guide rods (614) penetrate the connecting frame (1) and are sleeved with guide bearings (615) between the guide rods (614) and the frame (1); the bottoms of the four guide rods (614) are fixedly connected to a connecting bottom plate (618); and the connecting bottom plate (618) is located below the cylinder (611).

4. The plunger assembly clamping height adjustment mechanism for a spinning and closing machine according to claim 2, characterized in that: A clamping block (616) is clamped on the outer ring of the bottom of the sleeve connecting rod (62), and the clamping block (616) is fixedly connected to the connecting top plate (613).

5. The plunger assembly clamping height adjustment mechanism for a spinning and closing machine according to claim 2, characterized in that: A damping buffer (617) is also connected below the connecting top plate (613), and the bottom of the damping buffer (617) is fixedly connected to the frame (1).

6. The plunger assembly clamping height adjustment mechanism for a spinning and closing machine according to claim 1, characterized in that: A dovetail protrusion (431) is provided at the bottom of the dovetail slider (43), and a dovetail groove (441) is provided at the top of the dovetail guide seat (44), and the shapes of the dovetail protrusion (431) and the dovetail groove (441) match each other.

7. The plunger assembly clamping height adjustment mechanism for a spinning and closing machine according to claim 2, characterized in that: The frame (1) comprises an upper fixing plate (11), a lower fixing plate (12) and four support columns (13); the upper and lower ends of the support columns (13) are respectively fixedly connected to the upper fixing plate (11) and the lower fixing plate (12); the chuck mechanism (2) is arranged on the upper fixing plate (11); the dovetail guide seat (44) and the servo motor (51) are both fixed on the upper side of the lower fixing plate (12); and the cylinder (611) is fixed on the lower side of the lower fixing plate (12).

8. The plunger assembly clamping height adjustment mechanism for a spinning and closing machine according to claim 7, characterized in that: The chuck mechanism (2) comprises a coaxially mounted rear chuck (21), a chuck spindle (22) and a chuck bearing seat (23); the rear chuck (21) is provided with at least two movable claws (211) distributed at equal intervals along the circumference; and a rolling wheel mechanism (7) is fixedly mounted on each movable claw (211); The chuck bearing seat (23) is sleeved in the upper fixed plate (11) and fixed thereto, a chuck main shaft (22) is sleeved in the chuck bearing seat (23), the upper part of the chuck main shaft (22) is fixedly connected to the rear pull chuck (21), and the lower part of the chuck main shaft (22) is fixedly connected to a synchronous pulley (25), a three-phase asynchronous motor (8) is provided on the side of the frame (1), and the output shaft of the three-phase asynchronous motor (8) is connected to the synchronous pulley (25) through a synchronous belt (26).

9. The plunger assembly clamping height adjustment mechanism for a spinning and closing machine according to claim 8, characterized in that: A ball bearing (24) is sleeved between the chuck bearing seat (23) and the chuck main shaft (22), and a limiting sleeve (27) is sleeved between the small sleeve (63) and the rear pull chuck (21).

10. The plunger assembly clamping height adjustment mechanism for a spinning and closing machine according to claim 8, characterized in that: The rolling wheel mechanism (7) comprises a cutter head (71) and a rolling wheel body (72); the cutter head (71) is fixedly connected to the movable claw (211); the rolling wheel body (72) is arranged at one end of the cutter head (71) close to the plunger assembly (100) and is used for spinning and closing the plunger assembly (100).

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