Automatic feeding device for lead screws
By designing an automatic lead screw feeding device, which utilizes gravity feeding from the storage chamber and electric cylinder pushing, combined with automatic positioning of the inclined plate, the problem of low efficiency of manual feeding in traditional lead screw processing is solved, achieving automation and efficient feeding.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN BEIBIAO FASTENER MFG CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-04-28
AI Technical Summary
In traditional lead screw processing, the bar stock feeding process relies on manual operation, resulting in low efficiency and worker fatigue, making it difficult to achieve automation and efficient feeding.
An automatic screw feeding device was designed, which utilizes gravity feeding from the storage chamber and electric cylinder-assisted pushing, combined with automatic filler plate, to achieve a rhythmic feeding of "one push, one store" to ensure that the bar stock continuously enters the discharge chamber.
It has enabled automated and continuous feeding of bar stock, improved feeding efficiency, reduced human fatigue, and enhanced production continuity and automation.
Smart Images
Figure CN224169350U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lead screw manufacturing technology, specifically to an automatic lead screw feeding device. Background Technology
[0002] Screw machining is a crucial step in mechanical manufacturing, primarily used to produce transmission components such as ball screws and trapezoidal screws. These components play a core role in power transmission and position control in high-precision equipment such as CNC machine tools, industrial robots, and aerospace equipment. Traditional machining processes use round steel (bar stock) as raw material and involve multiple steps. However, traditional machining methods heavily rely on manual operation, particularly in the bar stock loading stage, where significant drawbacks exist: workers must manually handle the bars, resulting in low loading efficiency and fatigue from continuous loading. Therefore, an automatic screw feeding device is proposed. Utility Model Content
[0003] To address the problems in the existing technology, this utility model provides an automatic lead screw feeding device.
[0004] The technical solution adopted by this utility model to solve its technical problem is an automatic screw feeding device, including an automatic feeding device body. The top of the automatic feeding device body is provided with a storage cavity, the inside of which is used for storing bar stock. The lower part of the automatic feeding device body is provided with a discharge cavity, the discharge cavity and the storage cavity are connected through a feeding cavity. A second electric cylinder is fixedly installed inside the discharge cavity. The output end of the second electric cylinder is fixedly connected to one side of a push block, and the push block is slidably installed inside the discharge cavity.
[0005] By adopting the above technical solution, the storage chamber uses gravity feeding and the first electric cylinder to push the bar stock continuously into the discharge chamber; the second electric cylinder precisely pushes the two bars stock through stroke control, the front bar opens the baffle to complete the discharge, and the rear bar is retained to form a buffer. With the automatic filling of the inclined plate, the "push one, store one" rhythmic feeding is realized.
[0006] Specifically, a first electric cylinder is fixedly installed on the upper side of one side of the automatic feeding device body. The output end of the first electric cylinder is fixedly connected to one side of the push plate, and the push plate is located inside the storage cavity.
[0007] By adopting the above technical solution, when the bar stock in the storage chamber cannot be discharged independently due to stacking angle or frictional resistance, the first electric cylinder drives the pusher plate to advance horizontally along the inner wall of the storage chamber. The pushing force of the pusher plate acts on the side of the bar stock stack, forcibly releasing the jamming state between the bars, and causing the bars to slide down along the discharge chamber.
[0008] Specifically, a discharge port is provided on the lower side of one side of the automatic feeding device body, and a baffle is movably installed on the upper inner part of the discharge port.
[0009] By adopting the above technical solution, the baffle at the discharge port is normally kept closed by the spring pressure. When the second electric cylinder pushes the bar to abut the baffle, the axial thrust of the bar overcomes the spring resistance, forcing the baffle to move upward and compress the spring. At this time, the bar will pass through the baffle and be discharged from the discharge port to achieve continuous feeding. After the bar has completely passed through, the baffle will automatically reset and lock under the action of the spring.
[0010] Specifically, the top end of the baffle is fixedly connected to the bottom end of the limiting plate, the limiting plate is located inside the receiving cavity, the receiving cavity is opened in the upper inner part of the discharge port, the top end of the limiting plate is fixedly connected to the bottom end of the spring, and the top end of the spring is fixedly connected to the inner top of the receiving cavity.
[0011] By adopting the above technical solution, the limiting plate and the receiving cavity constitute a vertical guiding mechanism for the baffle. When the bar stock pushes against the baffle, the limiting plate moves smoothly upward along the guide rail within the receiving cavity, and the spring is compressed to store energy. After the bar stock passes through, the spring releases energy to push the limiting plate, causing the baffle to precisely reset.
[0012] Specifically, an inclined plate is provided at the upper part of the discharge chamber, which is located at the connection between the discharge chamber and the feeding chamber. The inclined plate has flow-guiding chamfers on both sides of its edges, which match the width of the feeding chamber outlet.
[0013] By adopting the above technical solution, the inclined plate connects the feeding chamber and the discharging chamber at a 45° angle, and its surface is polished to reduce the coefficient of friction. When the pusher block retracts, the bar stock buffered in the feeding chamber slides along the inclined plate to a predetermined position in front of the pusher block.
[0014] Specifically, one side of the automatic feeding device body is movably connected to the bin door via a hinge.
[0015] By adopting the above technical solution, the hinged silo door exposes part of the material chamber cross-section after opening, which facilitates the operator to perform maintenance and other operations on the second electric cylinder. When the silo door is closed, it achieves dust-tight closure through a magnetic sealing strip.
[0016] The beneficial effects of this utility model are:
[0017] The present invention discloses an automatic feeder device for lead screws. The storage chamber utilizes gravity feeding and the assisted pushing of the first electric cylinder to ensure that the bar stock continuously enters the discharge chamber. The second electric cylinder precisely pushes two bars through stroke control. The front bar pushes open the baffle to complete the discharge, while the rear bar is retained to form a buffer. With the automatic filling of the inclined plate, the device achieves a rhythmic feeding of "push one, store one". Attached Figure Description
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0020] Figure 2 This is a schematic diagram of the planar structure of the present invention;
[0021] Figure 3 This is a schematic diagram of the bar stock discharge structure of this utility model;
[0022] In the diagram: 1. Push plate; 2. Bar stock; 3. Storage chamber; 4. Automatic feeding device body; 5. Discharge port; 6. Baffle; 7. Door; 8. First electric cylinder; 9. Second electric cylinder; 10. Push block; 11. Inclined plate; 12. Discharge chamber; 13. Limiting plate; 14. Receiving chamber; 15. Spring; 16. Feeding chamber. Detailed Implementation
[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0024] As one embodiment of this utility model, such as Figures 1-3 As shown, the present invention discloses an automatic screw feeding device, comprising an automatic feeding device body 4, a storage cavity 3 at the top of the automatic feeding device body 4 for storing bar stock 2, a discharge cavity 12 at the lower part of the automatic feeding device body 4, the discharge cavity 12 and the storage cavity 3 being connected by a feeding cavity 16, a second electric cylinder 9 being fixedly installed inside the discharge cavity 12, the output end of the second electric cylinder 9 being fixedly connected to one side of a push block 10, and the push block 10 being slidably installed inside the discharge cavity 12.
[0025] In use, the storage chamber 3 is used to stack multiple layers of bar stock 2, and its bottom forms a gravity feeding channel with the feeding chamber 16. When the production line needs to be replenished, the bottommost bar stock 2 in the storage chamber 3 slides into the discharge chamber 12 along the feeding chamber 16 by its own weight. After the second electric cylinder 9 is started, it drives the pusher block 10 to move laterally, pushing the two bar stock 2 piled in the discharge chamber 12 towards the discharge port 5 simultaneously. The stroke of the pusher block 10 is precisely controlled to ensure that only the foremost bar stock is completely pushed out, while the next foremost bar stock is retained between the pusher block 10 and the baffle 6 to form a buffer.
[0026] It should be noted that the width of the pusher block 10 is the same as the length of the bar stock 2, which makes it easy to push the bar stock 2 horizontally. The height of the discharge chamber 12 only allows one bar stock 2 to move.
[0027] The present invention also includes a first electric cylinder 8 fixedly installed on the upper part of one side of the automatic feeding device body 4, the output end of the first electric cylinder 8 being fixedly connected to one side of the push plate 1, and the push plate 1 being disposed inside the storage cavity 3.
[0028] In use, when the bar stock 2 in the storage chamber 3 cannot be discharged independently due to stacking angle or frictional resistance, the first electric cylinder 8 drives the push plate 1 to advance horizontally along the inner wall of the storage chamber 3. The pushing force of the push plate 1 acts on the side of the bar stock stack, forcibly releasing the jamming state between the bars, causing the bar stock 2 to slide down along the discharge chamber 16.
[0029] The present invention also includes a discharge port 5 on the lower part of one side of the automatic feeding device body 4, and a baffle 6 is movably installed on the upper part of the discharge port 5.
[0030] In use, the baffle 6 of the discharge port 5 is normally kept closed by the pressure of the spring 15. When the second electric cylinder 9 pushes the bar 2 to abut the baffle 6, the axial thrust of the bar 2 overcomes the spring resistance, forcing the baffle 6 to move upward and compress the spring 15. At this time, the bar 2 will pass through the baffle 6 and be discharged from the discharge port 5 to achieve continuous feeding. After the bar has completely passed through, the baffle 6 will automatically reset and lock under the action of the spring 15.
[0031] It should be noted that the lower part of the side of the baffle 6 near the bar stock 2 has an arc-shaped structure, which makes it easier for the bar stock 2 to push the baffle 6 upward.
[0032] The present invention further includes that the top end of the baffle 6 is fixedly connected to the bottom end of the limiting plate 13, the limiting plate 13 is disposed inside the receiving cavity 14, the receiving cavity 14 is opened in the upper inner part of the discharge port 5, the top end of the limiting plate 13 is fixedly connected to the bottom end of the spring 15, and the top end of the spring 15 is fixedly connected to the top inner part of the receiving cavity 14.
[0033] In use, the limiting plate 13 and the receiving cavity 14 form a vertical guiding mechanism for the baffle 6. When the bar stock 2 pushes against the baffle 6, the limiting plate 13 moves smoothly upward along the guide rail within the receiving cavity 14, and the spring 15 is compressed to store energy. After the bar stock passes through, the spring 15 releases energy to push the limiting plate 13, causing the baffle 6 to precisely reset.
[0034] The present invention also includes an inclined plate 11 disposed at an incline downward in the upper part of the discharge chamber 12. The inclined plate 11 is located at the connection between the discharge chamber 12 and the discharge chamber 16. The inclined plate 11 has flow-guiding chamfers on both sides of its edges, which match the width of the discharge chamber 16 outlet.
[0035] In use, the inclined plate 11 connects the feeding chamber 16 and the discharge chamber 12 at a 45° angle, and its surface is polished to reduce the coefficient of friction. When the pusher block 10 retracts, the bar stock 2 buffered in the feeding chamber 16 slides along the inclined plate 11 into a predetermined position in front of the pusher block 10.
[0036] This utility model also includes a door 7 that is movably connected to one side of the automatic feeding device body 4 via a hinge.
[0037] When in use, the hinged silo door 7 opens to expose part of the cross section of the material chamber 12, which facilitates the operator to perform maintenance and other operations on the second electric cylinder 9. When the silo door 7 is closed, it achieves dust-tight closure through a magnetic sealing strip.
[0038] In use, the bar stock 2 is first placed horizontally in the storage chamber 3. Since the discharge chamber 16 is connected to the storage chamber 3, some of the bar stock will automatically fall into the discharge chamber 12 along the discharge chamber 16 and be blocked at the discharge port 5 by the baffle 6. Alternatively, the first electric cylinder 8 can be started by an external power source, which will drive the push plate 1 towards the discharge chamber 16, thus facilitating the feeding of the bar stock from the discharge chamber 3 into the discharge chamber 16. When it is necessary to replenish the bar stock 2, the second electric cylinder 9 is started by an external power source. The second electric cylinder 9 drives the push block 10 to push the two bar stock 2 located inside the discharge chamber 12 towards the discharge port 5. The bar stock 2 closest to the discharge port 5 will press the baffle 6 upward and will eventually be pushed out from the discharge port 5 to replenish the production line. The other bar stock 2 will remain between the baffle 6 and the push block 10 due to the limited pushing distance of the second electric cylinder 9 (e.g., Figure 3 (As shown), then the pusher 10 is retracted towards the direction of the second electric cylinder 9 by the activation of the second electric cylinder 9. At this time, the bar stock 2 located in the feeding chamber 16 will fall into the discharge chamber 12 along the direction of the inclined plate 11 (as shown). Figure 2 (As shown), this facilitates preparation for the next automatic material refill.
[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An automatic feeder for lead screws, comprising an automatic feeder body (4), characterized in that, The top of the automatic feeding device body (4) is provided with a storage cavity (3), the inside of which is used for storing bar stock (2). The lower part of the automatic feeding device body (4) is provided with a discharge cavity (12). The discharge cavity (12) and the storage cavity (3) are connected through a feeding cavity (16). A second electric cylinder (9) is fixedly installed inside the discharge cavity (12). The output end of the second electric cylinder (9) is fixedly connected to one side of the push block (10). The push block (10) is slidably installed inside the discharge cavity (12). A first electric cylinder (8) is fixedly installed on the upper part of one side of the automatic feeding device body (4). The output end of the first electric cylinder (8) is fixedly connected to one side of the push plate (1). The push plate (1) is located inside the storage cavity (3). A discharge port (5) is opened on the lower part of one side of the automatic feeding device body (4). A baffle (6) is movably installed in the upper part of the discharge port (5). The top of the baffle (6) is fixedly connected to the bottom of the limiting plate (13). The limiting plate (13) is located inside the receiving cavity (14). The receiving cavity (14) is opened in the upper part of the discharge port (5). The top of the limiting plate (13) is fixedly connected to the bottom of the spring (15). The top of the spring (15) is fixedly connected to the top of the receiving cavity (14). An inclined plate (11) is provided on the upper part of the discharge chamber (12) at an angle downwards. The inclined plate (11) is located at the connection between the discharge chamber (12) and the discharge chamber (16). The two sides of the inclined plate (11) are provided with guide chamfers and are matched with the outlet width of the discharge chamber (16). The automatic feeding device body (4) is connected to the hopper door (7) on one side by a hinge.