Automatic continuous feeding mechanism for shaft rod pieces

Abstract

The invention discloses an automatic continuous feeding mechanism for shaft rod pieces, which comprises a driving mechanism comprising a plurality of rotating motors, and each rotating motor drives a lead screw to rotate; the guide mechanism comprises a plurality of lead screws which are arranged in parallel, the lead screws at least penetrate through two moving plates, chucks which are coaxially arranged are fixed to the moving plates, and the chucks are provided with channel holes for clamping or releasing the shaft rod pieces; each moving plate is movably assembled with all the lead screws, the outer wall of each lead screw comprises an external thread section and an optical axis section, the moving plates are movably assembled with the external thread sections through nuts, and the moving plates are movably assembled with the optical axis sections through linear bearings; every two adjacent moving plates are movably assembled with the same lead screw through a nut and a linear bearing. The shaft rod piece is grabbed by the chuck, the movable plates are driven to move mutually through the rotation of the lead screw, and finally, the shaft rod piece is fed in cooperation with the grabbing and loosening period of the chuck.

Description

Technical Field

[0001] The invention relates to the field of automatic feeding, and in particular to an automatic continuous feeding mechanism of a shaft member. Background Art

[0002] In the field of automation, conveyor belts are the most common feeding mechanism. Conveyor belts can transport most workpieces. However, conveyor belts are sometimes not competent for shaft rods, because shaft rods have long axial dimensions and are prone to rolling. The automatic feeding mechanism of shaft rods needs to be designed specifically. Summary of the invention

[0003] The problem to be solved by the present invention is to provide an automated continuous feeding mechanism for shaft rods, to grasp the shaft rods by a chuck, to drive the movable plates to move relative to each other by the rotation of the lead screw, and to coordinate the tightening and loosening cycles of the chuck, thereby finally realizing the feeding action of the shaft rods.

[0004] In order to solve the above problems, the present invention provides an automatic continuous feeding mechanism for a shaft member. In order to achieve the above objectives, the technical solution adopted by the present invention to solve the technical problems is:

[0005] An automated continuous feeding mechanism for shaft rods comprises: a driving mechanism, comprising a plurality of rotating motors, each of which drives a lead screw to rotate; a guiding mechanism, comprising a plurality of lead screws arranged in parallel with each other, the lead screws being passed through at least two moving plates, each of which is fixed with a chuck coaxially arranged with each other, the chuck having a channel hole for clamping or releasing the shaft rods; each moving plate is movably assembled with all the lead screws, the outer wall of the lead screw comprises an external thread section and an optical axis section, the moving plate is movably assembled with the external thread section via a nut, and the moving plate is movably assembled with the optical axis section via a linear bearing; each moving plate is fixed with a plurality of nuts and a plurality of linear bearings; two adjacent moving plates are movably assembled with the same lead screw via a nut and a linear bearing respectively.

[0006] The beneficial effect of adopting the above technical solution is: this technical solution uses multiple chucks to grasp the shaft rod member, and then drives the movable plates to move relative to each other through the self-rotation of the lead screw, such as moving toward each other or moving away from each other, and then matches the periodic action of tightening and loosening of different chucks, and finally realizes the intermittent feeding action of the shaft rod member. There is no restriction on the shaft length of the shaft rod member itself. Even very long shaft rod members can be fed smoothly. In addition, the conventional lead screw is fully covered with threads, and the lead screw of the present technical solution is a part selectively arranged with threads, and a part is a smooth optical axis section like a cylinder. In this way, when the external thread section and the nut are movably assembled, the self-rotation of the lead screw can drive the axial movement of the nut. When the optical axis section contacts the linear bearing, the two only play a linear guiding role, and the self-rotation of the optical axis section will not drive the axial movement of the linear bearing, so the lead screw has both motion conversion ability and guiding ability.

[0007] As a further improvement of the present invention, the movable plate includes an upper movable plate and a lower movable plate parallel to each other; there are four lead screws in total, including two first lead screws and two second lead screws, the two first lead screws are located at diagonal positions of the same movable plate, and the two second lead screws are also located at diagonal positions of the same movable plate; the nut includes a first nut and a second nut; the linear bearing includes a first linear bearing and a second linear bearing; the first lead screw is assembled with the upper movable plate through the first nut; the second lead screw is assembled with the upper movable plate through the first linear bearing; the first lead screw is assembled with the lower movable plate through the second linear bearing; the second lead screw is assembled with the lower movable plate through the second nut.

[0008] The beneficial effect of adopting the above technical solution is: there are two types of four screws, and the four screws are arranged at four corners respectively, so that the arrangement positions of the nut and the linear bearing of the movable plate are more symmetrical, the force is more uniform, and the movable plate is not easy to tilt when moving.

[0009] As a further improvement of the present invention, the chuck includes an upper hydraulic chuck and a lower hydraulic chuck respectively fixed to the upper movable plate and the lower movable plate.

[0010] The beneficial effect of adopting the above technical solution is that the hydraulic chuck can obtain a larger clamping force by utilizing the hydraulic pressure.

[0011] As a further improvement of the present invention, the upper hydraulic chuck is fixed to the side of the upper movable plate facing the lower movable plate, and the lower hydraulic chuck is fixed to the side of the lower movable plate facing away from the upper movable plate; a lower flange is also fixed to the side of the lower movable plate facing the upper movable plate, an upper flange is fixed to the axial end of the upper hydraulic chuck, and a plurality of guide columns extending toward the upper hydraulic chuck are fixed to the lower flange, the upper flange is for the guide columns to pass through, and the upper flange has a guide sleeve movably assembled with the guide column.

[0012] The beneficial effect of adopting the above technical solution is that the upper flange, lower flange, guide column and guide sleeve are equivalent to providing a set of linear guide mechanism, which strengthens the entire radial anti-skew ability, ensures anti-loosening stability, ensures the coaxiality of the two hydraulic chucks, and thus ensures the smoothness of axial feeding.

[0013] As a further improvement of the present invention, the length of the external thread section of the lead screw is smaller than the length of the optical axis section; the cross-sectional profile at any point of the optical axis section is a circle with equal diameter; the diameter of the optical axis section is equal to the diameter corresponding to the thread top circle of the external thread section.

[0014] The beneficial effect of adopting the above technical solution is: in order to save actual processing costs, the entire lead screw can be processed from a cylindrical steel billet, and a recessed thread groove is processed locally to form relatively convex thread teeth.

[0015] As a further improvement of the present invention, the axial length of the guide column is smaller than the axial length of the lead screw, and the axial length of the guide column is not smaller than the length of the external thread section of the lead screw; the guide column and the lead screw are parallel to each other; the number of the guide columns is four, and the angle between the line connecting two adjacent guide columns and the line connecting two adjacent lead screws is 45°.

[0016] The beneficial effect of adopting the above technical solution is that the guide column and the lead screw are staggered with each other, and the staggered positions can better ensure the axial guiding stability and impact resistance.

[0017] As a further improvement of the present invention, the upper movable plate, the lower movable plate, the upper flange and the lower flange all have holes exposing the channel hole; the chuck includes a plurality of fan-shaped blocks in an annular array, the fan-shaped blocks together surround the channel hole, the fan-shaped blocks have translational freedom along the radial direction of the chuck, and the outer wall of the chuck has a joint.

[0018] The beneficial effect of adopting the above technical solution is: using hydraulic pressure to drive the sector blocks to move radially, the sector blocks approach each other to clamp the shaft rod, and the sector blocks move away from each other to loosen the shaft rod. The interface is convenient for connecting hydraulic oil.

[0019] As a further improvement of the present invention, a driven gear is coaxially fixed to the same end of the lead screw, and the rotating motor is meshed with the driven gear through the driving gear; the number of the rotating motors is four, the diameter of the driving gear is smaller than the diameter of the driven gear, and the driving gear and the driven gear are both helical gears.

[0020] The beneficial effects of adopting the above technical solution are: the driving gear and the driven gear transmit the rotational force, the relatively large driven gear can amplify the rotational torque of the screw, and the helical gear ensures the stability of force transmission.

[0021] As a further improvement of the present invention, a frame is fixed to the rotating motor; the driving gear and the driven gear are located outside the frame.

[0022] The beneficial effect of adopting the above technical solution is that the frame plays a role in wrapping and protecting the lead screw and the chuck.

[0023] As a further improvement of the present invention, the frame has a third linear bearing for the shaft member to rotate; the frame is also fixed with an angular cylinder, the angular cylinder has a pressure arm, the plane in which the pressure arm rotates is perpendicular to the axis of the shaft member itself, and the length of the pressure arm is greater than the radial distance from the angular cylinder to the third linear bearing.

[0024] The beneficial effect of adopting the above technical solution is that the third linear bearing is convenient for introducing the shaft rod. The angular cylinder plays an auxiliary role. When the axis of the shaft rod is not smoothly transmitted, the pressure arm of the angular cylinder swings a certain angle, swings to the top of the third linear bearing, and then contacts the shaft end of the shaft rod. Then, the pressure arm moves axially for a certain distance, and the shaft rod is driven for a certain distance, so as to ensure that the shaft rod is smoothly loosened from the chuck and the continuity of feeding is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a perspective view of an embodiment of the present invention;

[0027] Figure 2 is a perspective view of an embodiment of the present invention;

[0028] Figure 3 is a perspective view of a driving mechanism according to an embodiment of the present invention;

[0029] Figure 4 is a three-dimensional diagram of a guide mechanism and a hydraulic chuck according to an embodiment of the present invention;

[0030] Figure 5 is a three-dimensional diagram of a driving mechanism and a guiding mechanism according to an embodiment of the present invention;

[0031] Figure 6 is a three-dimensional diagram of a lower hydraulic chuck according to an embodiment of the present invention;

[0032] Figure 7 is a three-dimensional diagram of an upper hydraulic chuck according to an embodiment of the present invention;

[0033] Figure 8 It is a three-dimensional view of an upper hydraulic chuck according to an embodiment of the present invention.

[0034] 1-rotating motor; 2-driving gear; 3-driven gear; 4-third linear bearing; 5-upper moving plate; 51-notch; 6-lower moving plate; 7-angle cylinder; 71-pressing arm; 8-frame; 81-hollow hole; 9-first nut; 10-first linear bearing; 11-second nut; 12-second linear bearing; 13-first lead screw; 14-second lead screw; 15-upper hydraulic chuck; 151-connector; 152-sector block; 153-channel hole; 16-lower hydraulic chuck; 17-upper flange; 18-lower flange; 19-guide column; 20-guide sleeve. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with specific embodiments:

[0036] In order to achieve the purpose of the present invention, an automated continuous feeding mechanism for shaft rod components includes: a driving mechanism, including a plurality of rotating motors 1, each rotating motor 1 drives a lead screw to rotate; a guiding mechanism, including a plurality of lead screws arranged in parallel with each other, the lead screws being passed through at least two movable plates, each movable plate being fixed with a chuck arranged coaxially with each other, the chuck having a channel hole 153 for clamping or releasing the shaft rod component; each movable plate is movably assembled with all the lead screws, the outer wall of the lead screw includes an external thread section and an optical axis section, the movable plate is movably assembled with the external thread section through a nut, and the movable plate is movably assembled with the optical axis section through a linear bearing; each movable plate is fixed with a plurality of nuts and a plurality of linear bearings; two adjacent movable plates are movably assembled with the same lead screw through a nut and a linear bearing, respectively.

[0037] A number of balls are arranged on the inner wall of the linear bearing.

[0038] The beneficial effect of adopting the above technical solution is: this technical solution uses multiple chucks to grasp the shaft rod member, and then drives the movable plates to move relative to each other through the self-rotation of the lead screw, such as moving toward each other or moving away from each other, and then matches the periodic actions of tightening and loosening of different chucks, and finally realizes the intermittent feeding action of the shaft rod member. In addition, the conventional lead screw is fully covered with threads, and the lead screw of the present technical solution is a part selectively arranged with threads, and a part is a smooth optical axis section like a cylinder. In this way, when the external thread section and the nut are movably assembled, the self-rotation of the lead screw can drive the axial movement of the nut, and when the optical axis section contacts the linear bearing, the two only play a linear guiding role, and the self-rotation of the optical axis section will not drive the axial movement of the linear bearing, so the lead screw has both motion conversion ability and guiding ability.

[0039] like Figure 2As shown, in some other embodiments of the present invention, the movable plate includes an upper movable plate 5 and a lower movable plate 6 parallel to each other; there are four lead screws, including two first lead screws 13 and two second lead screws 14, the two first lead screws 13 are located at diagonal positions of the same movable plate, and the two second lead screws 14 are also located at diagonal positions of the same movable plate; the nut includes a first nut 9 and a second nut 11; the linear bearing includes a first linear bearing 10 and a second linear bearing 12; the first lead screw 13 is assembled with the upper movable plate 5 through the first nut 9; the second lead screw 14 is assembled with the upper movable plate 5 through the first linear bearing 10; the first lead screw 13 is assembled with the lower movable plate 6 through the second linear bearing 12; the second lead screw 14 is assembled with the lower movable plate 6 through the second nut 11.

[0040] The beneficial effect of adopting the above technical solution is: there are two types of four screws, and the four screws are arranged at four corners respectively, so that the arrangement positions of the nut and the linear bearing of the movable plate are more symmetrical, the force is more uniform, and the movable plate is not easy to tilt when moving.

[0041] In some other embodiments of the present invention, the chuck includes an upper hydraulic chuck 15 and a lower hydraulic chuck 16 fixed to the upper movable plate 5 and the lower movable plate 6 respectively.

[0042] The beneficial effect of adopting the above technical solution is that the hydraulic chuck can obtain a larger clamping force by utilizing the hydraulic pressure.

[0043] like Figure 2 As shown, in some other embodiments of the present invention, the upper hydraulic chuck 15 is fixed to the side of the upper movable plate 5 facing the lower movable plate 6, and the lower hydraulic chuck 16 is fixed to the side of the lower movable plate 6 facing away from the upper movable plate 5; a lower flange 18 is also fixed to the side of the lower movable plate 6 facing the upper movable plate 5, an upper flange 17 is fixed to the axial end of the upper hydraulic chuck 15, and a plurality of guide columns 19 extending toward the direction of the upper hydraulic chuck 15 are fixed to the lower flange 18, the upper flange 17 is for the guide columns 19 to pass through, and the upper flange 17 has a guide sleeve 20 movably assembled with the guide column 19.

[0044] The beneficial effect of adopting the above technical solution is that the upper flange, lower flange, guide column and guide sleeve are equivalent to providing a set of linear guide mechanism, which strengthens the entire radial anti-skew ability, ensures anti-loosening stability, ensures the coaxiality of the two hydraulic chucks, and thus ensures the smoothness of axial feeding.

[0045] In other embodiments of the present invention, the length of the external thread section of the lead screw is smaller than the length of the optical axis section; the cross-sectional profiles at any point of the optical axis section are circles with equal diameters; the diameter of the optical axis section is equal to the diameter corresponding to the thread top circle of the external thread section.

[0046] The beneficial effect of adopting the above technical solution is: in order to save actual processing costs, the entire lead screw can be processed from a cylindrical steel billet, and a recessed thread groove is processed locally to form relatively convex thread teeth.

[0047] like Figure 2 , Figure 4 , Figure 5 As shown, in some other embodiments of the present invention, the axial length of the guide column 19 is smaller than the axial length of the lead screw, and the axial length of the guide column 19 is not smaller than the length of the external thread section of the lead screw; the guide column 19 is parallel to the lead screw; the number of the guide columns 19 is four, and the angle between the line connecting two adjacent guide columns 19 and the line connecting two adjacent lead screws is 45°.

[0048] The beneficial effect of adopting the above technical solution is that the guide column and the lead screw are staggered with each other, and the staggered positions can better ensure the axial guiding stability and impact resistance.

[0049] like Figure 8 As shown, in other embodiments of the present invention, the upper movable plate 5, the lower movable plate 6, the upper flange 17, and the lower flange 18 have holes exposing the channel hole 153; the chuck includes a plurality of fan-shaped blocks 152 in an annular array, and the fan-shaped blocks 152 together surround the channel hole 153. The fan-shaped blocks 152 have the freedom of translation along the radial direction of the chuck, and the outer wall of the chuck has a joint 151.

[0050] The upper hydraulic chuck 15 and the lower hydraulic chuck 16 have the same specifications.

[0051] The upper hydraulic chuck 15 and the lower hydraulic chuck 16 both have the freedom of rotation. The upper hydraulic chuck 15 and the lower hydraulic chuck 16 each clamp an axle rod and rotate relative to each other. The facing ends of the two axle rods contact, squeeze and rotate relative to each other, and are finally welded together using the friction welding principle.

[0052] When the shaft member is mainly transported axially, the upper hydraulic chuck 15 and the lower hydraulic chuck 16 alternately grasp or release the outer wall of the shaft member, which has the same technical effect as a person's two hands alternately transporting a stick.

[0053] The beneficial effect of adopting the above technical solution is that the continuous feeding mechanism can be transformed into a friction welding device after simple modification. The hydraulic pressure is used to drive the radial movement of the fan-shaped blocks. The fan-shaped blocks are close to each other to clamp the shaft rod, and the fan-shaped blocks are far away from each other to loosen the shaft rod. The interface is convenient for connecting hydraulic oil.

[0054] like Figure 3As shown, in other embodiments of the present invention, a driven gear 3 is coaxially fixed to the same end of the lead screw, and the rotating motor 1 is meshed with the driven gear 3 through the driving gear 2; the number of the rotating motors 1 is four, the diameter of the driving gear 2 is smaller than the diameter of the driven gear 3, and the driving gear 2 and the driven gear 3 are both helical gears.

[0055] The beneficial effects of adopting the above technical solution are: the driving gear and the driven gear transmit the rotational force, the relatively large driven gear can amplify the rotational torque of the screw, and the helical gear ensures the stability of force transmission.

[0056] In some other embodiments of the present invention, a frame 8 is fixed to the rotating electrical machine 1 ; the driving gear 2 and the driven gear 3 are located outside the frame 8 .

[0057] The beneficial effect of adopting the above technical solution is that the frame plays a role in wrapping and protecting the lead screw and the chuck.

[0058] In some other embodiments of the present invention, the frame 8 has a third linear bearing 4 for the shaft member to rotate; the frame 8 is also fixed with an angular cylinder 7, and the angular cylinder 7 has a pressure arm 71, and the rotation plane of the pressure arm 71 is perpendicular to the axis of the shaft member itself, and the length of the pressure arm 71 is greater than the radial distance from the angular cylinder 7 to the third linear bearing 4.

[0059] like Figure 1 As shown, the driving gear 2, the driven gear 3, and the angle cylinder 7 are all located at the top of the frame 8. At the same time, the side wall of the frame 8 is provided with a plurality of hollow holes 81.

[0060] The beneficial effect of adopting the above technical solution is that the third linear bearing is convenient for introducing the shaft rod. The angular cylinder plays an auxiliary role. When the axis of the shaft rod is not smoothly transmitted, the pressure arm of the angular cylinder swings a certain angle, swings to the top of the third linear bearing, and then contacts the shaft end of the shaft rod. Then, the pressure arm moves axially for a certain distance, and the shaft rod is driven for a certain distance, so as to ensure that the shaft rod is smoothly loosened from the chuck and the continuity of feeding is ensured.

[0061] like Figure 2 and Figure 7 As shown, the edge of the upper movable plate 5 is provided with a recessed notch 51 , and the notch 51 is used to avoid the rotating motor 1 .

[0062] In order to facilitate the display of internal structure, Figure 2 compared to Figure 1 , Figure 2 Frame 8 is hidden. Figure 7 compared to Figure 8 , Figure 7 The upper moving plate 5 is shown more.

[0063] Since the lines of the external thread segment are very dense in the attached figure, Figure 2As shown, the thread shape of the external thread segment is not shown in the figure, but the boundary line between the external thread segment and the optical axis segment is distinguished.

[0064] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic continuous feeding mechanism for a shaft member, characterized in that: include: The driving mechanism includes a plurality of rotating motors, each of which drives a lead screw to rotate; The guide mechanism comprises a plurality of screws arranged in parallel with each other, the screws are penetrated by at least two moving plates, each moving plate is fixed with a chuck arranged coaxially with each other, and the chuck has a passage hole for clamping or releasing the shaft member; Each movable plate is movably assembled with all the lead screws, the outer wall of the lead screw includes an external thread section and an optical axis section, the movable plate is movably assembled with the external thread section through a nut, and the movable plate is movably assembled with the optical axis section through a linear bearing; Each moving plate is fixed with a number of nuts and a number of linear bearings; Two adjacent moving plates are movably assembled with the same lead screw through a screw nut and a linear bearing respectively.

2. The automatic continuous feeding mechanism of the shaft member according to claim 1, characterized in that: The movable plate comprises an upper movable plate and a lower movable plate which are parallel to each other; There are four screws in total, including two first screws and two second screws, the two first screws are located at diagonal positions of the same moving plate, and the two second screws are also located at diagonal positions of the same moving plate; The nut comprises a first nut and a second nut; the linear bearing comprises a first linear bearing and a second linear bearing; The first lead screw is assembled with the upper movable plate through a first nut; the second lead screw is assembled with the upper movable plate through a first linear bearing; The first lead screw is assembled with the lower movable plate through a second linear bearing; the second lead screw is assembled with the lower movable plate through a second nut.

3. The automatic continuous feeding mechanism of the shaft member according to claim 1, characterized in that: The chuck comprises an upper hydraulic chuck and a lower hydraulic chuck which are respectively fixed to an upper movable plate and a lower movable plate.

4. The automatic continuous feeding mechanism of the shaft member according to claim 3, characterized in that: The upper hydraulic chuck is fixed to a side of the upper movable plate facing the lower movable plate, and the lower hydraulic chuck is fixed to a side of the lower movable plate facing away from the upper movable plate; A lower flange is fixed to the side of the lower movable plate facing the upper movable plate, an upper flange is fixed to the axial end of the upper hydraulic chuck, a plurality of guide columns extending toward the upper hydraulic chuck are fixed to the lower flange, the guide columns pass through the upper flange, and the upper flange has a guide sleeve movably assembled with the guide column.

5. The automatic continuous feeding mechanism of the shaft member according to claim 1, characterized in that: The length of the external thread section of the lead screw is smaller than the length of the optical axis section; The cross-sectional profiles at any position of the optical axis segment are circles with equal diameters; The diameter of the optical axis section is equal to the diameter corresponding to the thread top circle of the external thread section.

6. The automatic continuous feeding mechanism of the shaft member according to claim 4, characterized in that: The axial length of the guide column is smaller than the axial length of the lead screw, and the axial length of the guide column is not smaller than the length of the external thread section of the lead screw; The guide column and the lead screw are parallel to each other; The number of the guide pillars is four, and the angle between the line connecting two adjacent guide pillars and the line connecting two adjacent lead screws is 45°.

7. The automatic continuous feeding mechanism of the shaft member according to claim 4, characterized in that: The upper movable plate, the lower movable plate, the upper flange, and the lower flange are all provided with openings exposing the passage holes; The chuck comprises a plurality of sector blocks in an annular array, the sector blocks together enclose a channel hole, the sector blocks have a degree of freedom of translation along the radial direction of the chuck, and the outer wall of the chuck is provided with a joint.

8. The automatic continuous feeding mechanism of the shaft member according to claim 1, characterized in that: A driven gear is coaxially fixed to the same end of the lead screw, and the rotary motor is meshed with the driven gear through the driving gear; The number of the rotating motors is four, the diameter of the driving gear is smaller than the diameter of the driven gear, and both the driving gear and the driven gear are helical gears.

9. The automatic continuous feeding mechanism of the shaft member according to claim 8, characterized in that: The rotating motor is fixed with a frame; the driving gear and the driven gear are located outside the frame.

10. The automatic continuous feeding mechanism of the shaft member according to claim 9, characterized in that: The frame is provided with a third linear bearing through which the shaft member rotates; The frame is also fixed with an angular cylinder, which is provided with a pressure arm. The rotation plane of the pressure arm is perpendicular to the axis of the shaft rod, and the length of the pressure arm is greater than the radial distance from the angular cylinder to the third linear bearing.

Images