Pull rod driving assembly for pull rod mechanism

Abstract

The utility model discloses a pulling rod driving assembly for a pulling rod mechanism, which comprises a limiting structure, a guide rod upright guide plate, an axial driving assembly and a downward pressing driving assembly, the limiting structure is rotatably sleeved on a guide rod, and the limiting structure is used for being clamped with a limiting groove on a material pushing rod; the axial driving assembly is used for driving the limiting structure to move in the axial direction of the guide rod. The upper edge of the vertical guide plate is provided with a lifting guide notch, the lifting guide notch is located in the range of the axial movement stroke of the limiting structure, and when the limiting structure is located at the position where the lifting guide notch is located, the limiting structure can be clamped into a limiting groove in a material pushing rod. When the limiting structure is located outside the lifting guide notch, the limiting structure retreats from the limiting groove in the material pushing rod. And the pressing driving assembly is used for forcing the limiting structure to deflect downwards. The use reliability of the pulling rod driving assembly in a lathe feeder with a small size can be improved.

Description

Technical Field

[0001] The present application relates to the field of lathe feeding technology, and particularly to a rod pulling drive assembly for a rod pulling mechanism. Background Art

[0002] CNC lathes are widely used in the processing of pipe fittings, bars, cones and other parts. In order to improve the workpiece loading efficiency and safety of CNC lathes, a lathe feeder has been developed in the prior art, which generally includes a feeding chute, a pusher rod and a driving member for driving the pusher rod to move. After the bar is introduced into the feeding chute, one end of the bar is pushed by the pusher rod to move the bar forward to a position close to the lathe processing position, so as to achieve the purpose of automatic feeding.

[0003] In the lathe feeder, the pusher rod is a very important part. The pusher rod is driven by a chain to move along the length direction of the track. A material clamp is arranged at the front end of the pusher rod for tightly clamping the bar. When the bar is processed, a small section of residual material will remain on the bar. The remaining residual material is clamped by the material clamp. When the pusher rod is reset, a clamping rod mechanism needs to be cooperated to realize the separation between the pusher rod and the residual material. Specifically, the residual material is clamped by the clamping rod mechanism, and the chain is used to drive the pusher rod to retreat, so as to achieve the purpose of separating the material clamp on the pusher rod from the residual material. The chain is used in cooperation with the material clamping mechanism for a long time to realize the separation between the pusher rod and the residual material, which may affect the service life of the chain.

[0004] The applicant previously applied for a utility model patent with the name: Rod pulling mechanism and lifting rod assembly for a pusher rod, and the application number: 2023234351975, which provided a rod pulling drive assembly. The rod pulling drive assembly includes a limiting structure and an axial drive assembly. The axial drive assembly drives the limiting structure to move axially. The limiting structure can cooperate with the limiting groove on the pusher rod to perform the rod pulling action, alleviating the influence of the rod pulling action of the residual material on the chain life.

[0005] However, the applicant found in subsequent R & D practices that the limiting structure of the rod pulling drive assembly is clamped into the limiting groove on the pusher rod by gravity. When this structure of the rod pulling drive assembly is used in a lathe feeder with a smaller size, the gravity of the limiting structure is small, and it is difficult to reliably clamp into the limiting groove. Utility Model Content

[0006] In order to improve the reliability of the rod pulling drive assembly used in a lathe feeder with a smaller size, the present application provides a rod pulling drive assembly for a rod pulling mechanism.

[0007] The rod pulling drive assembly for a rod pulling mechanism provided by the present application adopts the following technical solutions:

[0008] The rod pulling drive assembly for a rod pulling mechanism includes a limiting structure, a guide rod vertical guide plate, an axial drive assembly, and a downward pressing drive assembly. The limiting structure is rotatably sleeved and installed on the guide rod. The limiting structure is used to engage with a limiting groove on the pusher rod. The axial drive assembly is used to drive the limiting structure to move axially along the guide rod. The upper edge of the vertical guide plate is provided with a lifting guide notch, and the lifting guide notch is within the axial movement stroke range of the limiting structure. When the limiting structure is at the position where the lifting guide notch is located, the limiting structure can be inserted into the limiting groove on the pusher rod. When the limiting structure is outside the lifting guide notch, the limiting structure exits the limiting groove on the pusher rod. The downward pressing drive assembly is used to force the limiting structure to deflect downward.

[0009] By adopting the above technical solution, during the process of the rod pulling drive assembly performing the rod pulling action, the axial drive member drives the limiting structure to move axially, so that the limiting structure moves to the position where the avoidance notch is located. The downward pressing drive assembly forces the limiting structure to rotate downward around the guide rod and is inserted into the limiting groove on the pusher rod. As the limiting structure continues to move, the limiting structure drives the pusher rod to retreat, forcing the front end of the pusher rod to separate from the bar stock residue. Using the driving effect of the downward pressing drive assembly to replace the gravity of the limiting structure itself can enable the limiting structure to be more reliably inserted into the limiting groove, enabling the rod pulling drive assembly to be better applied to small-sized lathe feeders.

[0010] Optionally, the downward pressing drive assembly is a tension spring. One end of the tension spring is connected to the limiting structure, and the other end of the tension spring is linked to the axial drive assembly. When the limiting structure leaves the lifting guide notch, the tension spring undergoes tensile deformation.

[0011] By adopting the above technical solution, when the limiting structure leaves the lifting guide notch, the tension spring undergoes tensile deformation. Conversely, when the limiting structure enters the inner side of the lifting guide notch from the outside, the elastic deformation force of the tension spring can force the limiting structure to rotate and be inserted into the limiting groove of the pusher rod.

[0012] Optionally, the downward pressing drive assembly includes a first magnet and a second magnet. The first magnet is installed on the limiting structure, and the second magnet is installed on the axial drive assembly. There is a magnetic attraction force between the first magnet and the second magnet.

[0013] By adopting the above technical solution, when the limiting structure enters the inner side of the lifting guide notch from the outside, the magnetic attraction force between the first magnet and the second magnet can force the limiting structure to rotate and be inserted into the limiting groove of the pusher rod.

[0014] Optionally, the limiting structure includes a limiting body, a linear bearing and a sliding column, the limiting body is a sheet metal part, the limiting body is rotatably mounted on the guide rod through the linear bearing, the sliding column is mounted on the limiting body, and the sliding column is perpendicular to the guide rod in different planes; the limiting body is bent and provided with a clamping portion, and the clamping portion is used to clamp into the limiting groove of the pushing rod.

[0015] By adopting the above technical solution, the clamping part of the limiting main body is formed through a sheet metal bending process, which simplifies the structure of the limiting main body and helps to reduce the assembly process of the limiting structure.

[0016] Optionally, the limiting main body is provided with a reinforcing plate, the reinforcing plate is parallel to the clamping portion, and the reinforcing plate is provided with a reinforcing portion adapted to the clamping portion.

[0017] By adopting the above technical solution, the reinforcing plate and the clamping part of the limiting main body jointly play the role of pushing the push rod, which is beneficial to reducing the load of the clamping part, thereby reducing the thickness requirement of the limiting main body.

[0018] Optionally, the clamping portion is bent downward, and a vertical side edge on one side of the clamping portion is an abutting edge, the abutting edge is used to abut a limiting groove on the push rod, and a guide fillet is provided on a side of the clamping portion away from the abutting edge.

[0019] By adopting the above technical solution, when the clamping part is clamped into the limiting groove on the push rod, the guide radius guides the clamping part entering the limiting groove, so that a certain axial position error can be allowed between the clamping part and the limiting groove.

[0020] Optionally, the axial drive assembly includes a sliding rod and a sliding drive member, the sliding rod is parallel to the guide rod, and the sliding drive member is used to drive the sliding rod to reciprocate along its own length direction; the sliding rod is provided with a first push plate, and the first push plate is provided with a clamping notch for avoiding the sliding column.

[0021] By adopting the above technical solution, the engaging notch on the first push plate cooperates with the slide column, and when the sliding driving member drives the sliding rod to move back and forth, the sliding rod drives the limiting structure to move through the first push plate.

[0022] Optionally, the sliding rod is provided with a second push plate, the second push plate is a groove-shaped structure, and the limiting main body is provided with a thrust transfer plate, and the thrust transfer plate is located in the groove-shaped space of the second push plate.

[0023] By adopting the above technical solution, when the sliding driving member drives the sliding rod to reciprocate, the sliding rod drives the thrust transmission plate of the limiting structure through the second push plate, thereby driving the limiting structure to move. By providing the first push plate and the second push plate, there are two acting points between the axial driving assembly and the limiting structure, making the driving effect of the axial driving assembly on the limiting structure more stable and reliable.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Utilizing the driving effect of the downward pressing driving assembly to replace the self-gravity of the limiting structure can enable the limiting structure to be more reliably clamped into the limiting groove, enabling the rod pulling driving assembly to be better applied to small-sized lathe feeders.

[0026] 2. The clamping portion of the limiting main body member is formed by a sheet metal bending process, simplifying the structure of the limiting main body member and facilitating the reduction of the assembly process of the limiting structure. Description of the Drawings

[0027] Figure 1 is a schematic diagram of the rod pulling driving assembly for the rod pulling mechanism in the installed and used state in Embodiment 1.

[0028] Figure 2 is Figure 1 a schematic diagram of the position at A in

[0029] Figure 3 is a schematic diagram of the structure of the downward pressing driving assembly in Embodiment 1.

[0030] Figure 4 is a schematic diagram for showing the positional relationship between the clamping portion and the limiting groove on the pusher rod in Embodiment 1.

[0031] Figure 5 is a schematic diagram for showing the positional relationship between the clamping portion and the limiting groove on the pusher rod in Embodiment 2.

[0032] Description of the Reference Numerals:

[0033] 1. Limiting structure; 11. Limiting main body member; 111. Clamping portion; 1111. Abutting edge; 1112. Guide fillet; 12. Linear bearing; 13. Slide column; 14. Reinforcing plate; 141. Reinforcing portion; 15. First screw; 16. Limiting screw; 17. Thrust transmission plate; 2. Guide rod; 3. Upright guide plate; 31. Lifting guide notch; 4. Axial driving assembly; 41. Sliding rod; 42. Sliding driving member; 421. Motor; 422. Gear-rack transmission assembly; 43. First push plate; 431. Clamping notch; 44. Second push plate; 5. Downward pressing driving assembly; 51. Tensile spring; 52. Second screw; 53. First magnet; 54. Second magnet; 20. Pusher rod; 201. Limiting groove. Detailed implementation manners

[0034] The following further describes the present application in detail with reference to the Figures 1-5 accompanying drawings.

[0035] Embodiment 1

[0036] The embodiment of the present application discloses a rod pulling drive assembly for a rod pulling mechanism. Referring to Figure 1 and Figure 2 , the rod pulling drive assembly for the rod pulling mechanism includes a limit structure 1, a guide rod 2, an upright guide plate 3 and an axial drive assembly 4. The limit structure 1 is rotatably sleeved on the guide rod 2. The limit structure 1 is used for engaging with a limit groove 201 on a pusher rod 20. The axial drive assembly 4 is used for driving the limit structure 1 to axially move along the guide rod 2. An up-down guide notch 31 is provided at the upper edge of the upright guide plate 3, and the up-down guide notch 31 is within the axial movement stroke range of the limit structure 1.

[0037] When the limit structure 1 is located at the position where the up-down guide notch 31 is located, the limit structure 1 can be engaged with the limit groove 201 on the pusher rod 20, so that the limit structure 1 can drive the pusher rod 20 to perform a rod pulling action. When the limit structure 1 is outside the up-down guide notch 31, the limit structure 1 withdraws from the limit groove 201 on the pusher rod 20.

[0038] Referring to Figure 1 , the limit structure 1 includes a limit main body member 11, a linear bearing 12 and a sliding column 13. The limit main body member 11 is a sheet metal part. The limit main body member 11 is rotatably mounted on the guide rod 2 through the linear bearing 12. The sliding column 13 is perpendicular to the guide rod 2 in a different plane. The limit main body member 11 is bent downward to be provided with a clamping portion 111. The clamping portion 111 is used for being engaged with the limit groove 201 of the pusher rod 20. Two ends of the sliding column 13 are respectively connected to the limit main body member 11 through first screws 15.

[0039] Referring to Figure 3 and Figure 4 , the limit main body member 11 is provided with a reinforcing plate 14. The reinforcing plate 14 is parallel and attached to the clamping portion 111. The reinforcing plate 14 is provided with a reinforcing portion 141 adapted to the clamping portion 111. The reinforcing plate 14 is located between the clamping portion 111 and the end face of the sliding column 13. One of the first screws 15 connecting the sliding column 13 passes through the reinforcing plate 14. The reinforcing plate 14 is threadedly connected with a limit screw 16. The limit screw 16 passes through the clamping portion 111. The limit screw 16 and the first screw 15 passing through the reinforcing plate 14 jointly form a positioning effect on the reinforcing plate 14.

[0040] Referring to Figure 4, one of the vertical side edges of the clamping portion 111 is the abutting edge 1111, and the abutting edge 1111 is used to abut against the limiting groove 201 on the pushing rod 20. A guiding fillet 1112 is provided on the side of the clamping portion 111 away from the abutting edge 1111. When the clamping portion 111 is inserted into the limiting groove 201 on the pushing rod 20, the guiding fillet 1112 guides the process of the clamping portion 111 entering the limiting groove 201.

[0041] Referring to Figure 1 , the axial driving assembly 4 includes a sliding rod 41 and a sliding driving member 42. The sliding rod 41 is a square rod, and the sliding rod 41 is parallel to the guide rod 2. The sliding driving member 42 includes a motor 421 and a gear-rack transmission assembly 422. The motor 421 drives the sliding rod 41 through the gear-rack transmission assembly 422, so that the sliding rod 41 reciprocates along its own length direction.

[0042] Referring to Figure 3 , the sliding rod 41 is provided with a first pushing plate 43 and a second pushing plate 44. The first pushing plate 43 is vertically arranged, and the first pushing plate 43 is provided with a clamping notch 431 for avoiding the sliding column 13. The second pushing plate 44 is of a groove-shaped structure, the notch of the second pushing plate 44 faces upward, and the limiting main body member 11 is provided with a thrust transfer plate 17, and the thrust transfer plate 17 is located in the groove-shaped space of the second pushing plate 44.

[0043] When the sliding rod 41 moves, the sliding rod 41 can drive the limiting structure 1 through the first pushing plate 43 and the second pushing plate 44, so that there are two acting points between the axial driving assembly 4 and the limiting structure 1, making the driving effect of the axial driving assembly 4 on the limiting structure 1 more reliable.

[0044] On the other hand, since the limiting structure 1 will rotate and shift relative to the axial driving assembly 4 during the moving process, in this case, the position of the acting point between the axial driving member and the limiting structure 1 will change relatively. By making there be two acting points between the axial driving assembly 4 and the limiting structure 1, the requirement for the matching dimensions of the acting points between the axial driving assembly 4 and the limiting structure 1 can be reduced.

[0045] Referring to Figure 3 , the pulling rod driving assembly further includes a downward pressing driving assembly 5. The downward pressing driving assembly 5 is a tension spring 51. One end of the tension spring 51 is connected to the limiting main body member 11 through a second screw 52, and the other end of the tension spring 51 is connected to the side wall of the second pushing plate 44 through a second screw 52. When the limiting structure 1 leaves the lifting guiding notch 31, the tension spring 51 undergoes tensile deformation. Relatively, when the limiting structure 1 enters the guiding notch from the outside, the elastic deformation force of the tension spring 51 can drive the clamping portion 111 downward, so that the clamping portion 111 can be reliably inserted into the limiting groove 201 on the pushing rod 20.

[0046] The implementation principle of the rod pulling drive assembly for the rod pulling mechanism in the embodiments of this application is as follows: during the process of the rod pulling drive assembly performing the rod pulling action, the axial drive member drives the limiting structure 1 to move axially, so that the limiting structure 1 moves to the position where the avoidance notch is located. The downward pressing drive assembly 5 forces the limiting structure 1 to rotate downward around the guide rod 2 and snap into the limiting groove 201 on the pushing rod 20. As the limiting structure 1 continues to move, the limiting structure 1 drives the pushing rod 20 to retreat, forcing the front end of the pushing rod 20 to separate from the bar stock residue. Using the driving effect of the downward pressing drive assembly 5 to replace the gravity of the limiting structure 1 itself can enable the limiting structure 1 to be more reliably snapped into the limiting groove 201, so that the rod pulling drive assembly can be better applied to small-sized lathe feeders.

[0047] Embodiment 2

[0048] The difference between this embodiment and Embodiment 1 is that the downward pressing drive assembly 5 in this embodiment is different from that in Embodiment 1.

[0049] Referring to Figure 5 , the downward pressing drive assembly 5 in this embodiment includes a first magnet 53 and a second magnet 54. The first magnet 53 is installed on the limiting structure 1, and the second magnet 54 is installed on the axial drive assembly 4. There is a magnetic attraction force between the first magnet 53 and the second magnet 54.

[0050] It is worth mentioning that the downward pressing drive assembly 5 can also be replaced by an elastic webbing, a rubber band, etc.

[0051] The above are all the preferred embodiments of this application. The protection scope of this application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A rod pulling drive assembly for a rod pulling mechanism, characterized in that: The invention comprises a limiting structure (1), a guide rod (2), an upright guide plate (3), an axial drive assembly (4) and a downward drive assembly (5), wherein the limiting structure (1) is rotatably sleeved and mounted on the guide rod (2), the limiting structure (1) is used to engage with a limiting groove (201) on a push rod (20), and the axial drive assembly (4) is used to drive the limiting structure (1) to move axially along the guide rod (2); an upper edge of the upright guide plate (3) is provided with a lifting guide notch (31), and the lifting guide notch ( The limiting structure (1) is located within the range of the axial movement stroke of the limiting structure (1); when the limiting structure (1) is located at the position where the lifting guide notch (31) is located, the limiting structure (1) can be inserted into the limiting groove (201) on the push rod (20); when the limiting structure (1) is located outside the lifting guide notch (31), the limiting structure (1) exits the limiting groove (201) on the push rod (20); the downward pressing drive assembly (5) is used to force the limiting structure (1) to deflect downward.

2. The rod pulling drive assembly for the rod pulling mechanism according to claim 1, characterized in that: The downward pressing driving component (5) is a tension spring (51), one end of the tension spring (51) is connected to the limiting structure (1), and the other end of the tension spring (51) is connected to the axial driving component (4). When the limiting structure (1) moves away from the lifting guide notch (31), the tension spring (51) is stretched and deformed.

3. The rod pulling drive assembly for a rod pulling mechanism according to claim 1, characterized in that: The downward pressing driving assembly (5) comprises a first magnet (53) and a second magnet (54), wherein the first magnet (53) is mounted on the limiting structure (1), and the second magnet (54) is mounted on the axial driving assembly (4), and there is a magnetic attraction force between the first magnet (53) and the second magnet (54).

4. The rod pulling drive assembly for a rod pulling mechanism according to claim 1, characterized in that: The limiting structure (1) comprises a limiting body (11), a linear bearing (12) and a sliding column (13); the limiting body (11) is a sheet metal part; the limiting body (11) is rotatably mounted on the guide rod (2) via the linear bearing (12); the sliding column (13) is mounted on the limiting body (11); the sliding column (13) and the guide rod (2) are skewed and perpendicular; the limiting body (11) is bent to provide a clamping portion (111); the clamping portion (111) is used to clamp into a limiting groove (201) of a push rod (20).

5. The rod pulling drive assembly for a rod pulling mechanism according to claim 4, characterized in that: The position-limiting main body (11) is provided with a reinforcing plate (14), the reinforcing plate (14) is parallel to the clamping portion (111), and the reinforcing plate (14) is provided with a reinforcing portion (141) adapted to the clamping portion (111).

6. The rod pulling drive assembly for a rod pulling mechanism according to claim 4, characterized in that: The clamping portion (111) is bent downward, and a vertical side edge of one side of the clamping portion (111) is an abutting edge (1111), the abutting edge (1111) is used to abut against a limiting groove (201) on the push rod (20), and a guide fillet (1112) is provided on a side of the clamping portion (111) away from the abutting edge (1111).

7. The rod pulling drive assembly for a rod pulling mechanism according to claim 4, characterized in that: The axial drive assembly (4) comprises a sliding rod (41) and a sliding drive member (42), wherein the sliding rod (41) is parallel to the guide rod (2), and the sliding drive member (42) is used to drive the sliding rod (41) to reciprocate along its own length direction; the sliding rod (41) is provided with a first push plate (43), and the first push plate (43) is provided with a clamping notch (431) for avoiding the sliding column (13).

8. The rod pulling drive assembly for a rod pulling mechanism according to claim 7, characterized in that: The sliding rod (41) is provided with a second push plate (44), the second push plate (44) is a groove-shaped structure, and the limiting main body (11) is provided with a thrust transmission plate (17), and the thrust transmission plate (17) is located in the groove-shaped space of the second push plate (44).

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