Automatic feeding device for rod parts of different lengths

Abstract

The utility model provides a kind of rod class parts automatic feeding device suitable for different lengths, it includes: rack, material bin material guiding mechanism and feeding station seat, first material ejecting mechanism and second material ejecting mechanism.Two left and right symmetrical material piece support plates of material bin material guiding mechanism are arranged obliquely downward;First material ejecting mechanism is arranged at the gap between material piece support plate and the first station groove of feeding station seat, and the top is provided with first material ejecting block;Second material ejecting mechanism is arranged in the middle of corresponding feeding station seat inner side wall, and the top is provided with second material ejecting block and third material ejecting block.The utility model provides the collaborative design of adjustable material bin material guiding mechanism and multi-station material ejecting mechanism, realizes the automatic distribution, accurate positioning and continuous feeding of rod class parts, significantly improves production efficiency and adaptability, is suitable for piston rod, shaft class parts and other long-diameter ratio large workpiece assembly scene, and has high popularization value.

Description

Technical Field

[0001] This utility model relates to the field of automated assembly equipment technology, and in particular to an automatic feeding device for rod-type parts of different lengths. Background Technology

[0002] In the field of automated assembly lines, the assembly of rod-shaped parts (such as piston rods and shafts) is widely used, and the feeding methods are also diverse. A large number of rod-shaped parts need to be loaded into corresponding hoppers for sorting before being automatically picked up by the next process to achieve automated assembly. Currently, most rod-shaped parts feeding methods on the market rely on manual operation, but manual feeding methods generally have the following drawbacks: 1) High cost: Requires dedicated personnel, leading to continuously increasing labor costs; 2) Low efficiency: Manual placement of parts is slow and prone to fatigue, resulting in unstable production cycles; 3) Poor adaptability: Rod-shaped parts of different lengths or diameters require changing special fixtures or adjusting equipment, which is cumbersome and affects production flexibility; 4) Insufficient precision: Manual alignment is prone to deviation, leading to failed material handling or assembly errors by downstream robotic arms. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an automatic feeding device for rod-shaped parts of different lengths, which can realize the automatic gripping of rod-shaped parts in subsequent processes, improve feeding efficiency, reduce costs, and achieve stable production, in order to address the deficiencies of the existing technology.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0005] An automatic feeding device for rod-shaped parts of different lengths includes: a frame, a hopper guiding mechanism fixedly mounted on the frame, and a feeding station seat, a first ejector mechanism, and a second ejector mechanism symmetrically mounted on the front end plate of the hopper guiding mechanism, wherein:

[0006] The material guide mechanism has two symmetrically arranged material support plates on the left and right sides, which are inclined downward from the rear end to the front end. Several rod-like parts are placed on them in sequence, and the front end of each material support plate is arranged with a gap between it and the loading station seat.

[0007] The first material-lifting mechanism is vertically positioned in the gap between the front end of the corresponding material support plate and the rear end of the first work station groove of the loading station seat. A first material-lifting block is provided on its top, which is used to push each rod-type part upward and fall into the downstream first work station groove one by one.

[0008] The second top material mechanism is vertically arranged in the middle of the inner wall of the corresponding loading station seat. It is equipped with a second top material block and a third top material block at its top, which are used to push the corresponding rod-like parts in the first and second station slots above upwards and fall into the second and third station slots downstream.

[0009] Preferably, the hopper guiding mechanism includes a first hopper side plate, a second hopper side plate, and a third hopper side plate installed at left-right intervals on the top of the frame, wherein:

[0010] The material support plates are horizontally arranged at an inclined angle on the lower inner sidewalls of the first hopper side plate and the second hopper side plate, respectively, and the inclination angle of the front and rear ends of the material support plates is 10-35°.

[0011] A rear baffle plate is vertically provided on the inner sidewalls of the first hopper side plate and the second hopper side plate, respectively, with the lower end of the rear baffle plate extending downward to the rear end of the material support plate.

[0012] Front baffles are vertically arranged on the inner sidewalls of the first and second hopper side panels facing each other. The guide plate at the lower end of the front baffle is inclined downward and arranged close to the front end of the material support plate to form a feeding port between the two that can only accommodate one rod-like part.

[0013] Preferably, the front ends of the two material support plates are respectively hinged to the first hopper side plate and the second hopper side plate via a first hinge shaft, and the rear ends are respectively adjustablely installed in the first strip hole on the first hopper side plate and the second hopper side plate via a pin and a height adjustment bolt assembly, and the height adjustment bolt assembly is fixed to the corresponding hopper side plate.

[0014] The lower end of the front baffle plate is hinged to the first hopper side plate and the second hopper side plate respectively via a second hinge shaft. The upper end is adjustablely installed in the second strip hole on the first hopper side plate and the second hopper side plate via locking bolts. This is used to adjust the opening size of the feeding port between the guide plate at the lower end of the front baffle plate and the front end of the material support plate, so as to match the rod-type parts of different diameters.

[0015] More preferably, the second hopper side plate is slidably mounted on the corresponding horizontal square tube of the frame relative to the first hopper side plate by means of several rollers installed at the bottom;

[0016] Furthermore, the first hopper side plate, the second hopper side plate, and the third hopper side plate are connected by a number of spaced guide rod mechanisms and at least one screw adjustment mechanism, and one end of the screw adjustment mechanism is provided with a rotating handwheel.

[0017] Preferably, workpiece sensing sensors are respectively provided on the front end plates of the first hopper side plate and the second hopper side plate at the positions corresponding to the first work station slot and the third work station slot.

[0018] Preferably, each of the loading stations includes a connecting plate, a workpiece receiving plate, and a workpiece buffer pad, wherein:

[0019] The front and rear ends of the workpiece receiving plate are respectively fixedly installed on the inner side wall of the front end plate of the hopper guiding mechanism through connecting plates, and the top of the plate is provided with the first work station slot, the second work station slot and the third work station slot in sequence from the rear end to the front end.

[0020] The first, second, and third workstation slots are connected in sequence and arranged in a sawtooth shape. The surface of each workstation slot is set as an inclined surface that is inclined downward along the flow direction of the rod-type parts, and the workpiece buffer pad is applied to the surface.

[0021] Preferably, each of the first ejector mechanisms includes a mounting plate, a first cylinder, a first ejector block, a slider, and a linear guide rail, wherein:

[0022] The outer end wall of the mounting plate is fixedly installed on the inner side wall of the front end plate of the hopper guiding mechanism, and the first cylinder is fixedly installed at its lower end. The vertically arranged linear guide rail is fixedly installed on the inner end wall.

[0023] The slider is mounted on the telescopic rod of the first cylinder. The slider is slidably mounted on the linear guide rail, and the first top material block is fixedly mounted on its top.

[0024] The first top material block is located between the mounting plate and the front end of the hopper guiding mechanism, and its top is set as an inclined surface arranged downward along the flow direction of the rod-like parts, and the horizontal distance between the top of the inclined surface and the mounting plate is less than the diameter of the rod-like parts.

[0025] More preferably, the first top block is arranged to fit the mounting plate, and its top is configured as a triangular structure with two inclined surfaces at the front and back;

[0026] Furthermore, a lifting baffle is provided above the first top material block and the mounting plate, which is inclined downward along the flow direction of the rod-like parts. The lifting baffle is bolted to the inner side wall of the front end plate of the corresponding hopper guiding mechanism.

[0027] Preferably, each of the second ejector mechanisms includes a second cylinder and a pusher plate, wherein:

[0028] The second cylinder is fixedly installed on the inner side wall of the front end plate of the corresponding hopper guiding mechanism, and the top of its telescopic rod is fixedly connected to the bottom of the push plate.

[0029] The top of each end of the push plate is provided with an integrally formed second top material block and a third top material block, and the top of the second top material block and the third top material block are both set as inclined surfaces arranged downward along the flow direction of the rod-like parts.

[0030] Preferably, it further includes a workpiece alignment mechanism, which comprises an L-shaped mounting plate, a third cylinder, an adapter block, and an alignment push plate, wherein:

[0031] The L-shaped mounting plate is fixedly installed on the outer side wall of the front end plate of the silo guiding mechanism, and the third cylinder is installed on it. The adapter block is fixedly installed on the telescopic rod of the third cylinder.

[0032] The alignment push plate is correspondingly disposed in the strip-shaped clearance hole opened on the front end plate. Its outer side wall is fixedly connected to the adapter block, and its inner side wall is respectively facing the first work station slot, the second work station slot and the third work station slot. Clearance through holes are opened at both ends corresponding to the positions of the workpiece sensing sensors.

[0033] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0034] This utility model provides an automatic feeding device for rod-shaped parts of different lengths. Through the coordinated design of an adjustable hopper guiding mechanism and a multi-station ejector mechanism, it achieves automatic material distribution, precise positioning, and continuous feeding of rod-shaped parts, significantly improving production efficiency and adaptability. As needed, it can quickly adapt to rod-shaped parts of different lengths and diameters through a lead screw adjustment mechanism and an adjustable material support plate, demonstrating high adaptability. Moreover, the automatic feeding device is driven by a cylinder throughout the ejector action, requiring no manual intervention, with a stable feeding cycle and a high degree of automation. It is particularly suitable for assembly scenarios of workpieces with large length-to-diameter ratios, such as piston rods and shaft parts, and has high promotional value. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of an automatic feeding device for rod-like parts of different lengths according to the present invention. Figure 1 ;

[0036] Figure 2 This is a three-dimensional structural diagram of an automatic feeding device for rod-like parts of different lengths according to the present invention. Figure 2 ;

[0037] Figure 3 This is a three-dimensional structural diagram of an automatic feeding device for rod-like parts of different lengths according to the present invention. Figure 3 ;

[0038] Figure 4This is a schematic diagram of the main structure of an automatic feeding device for rod-shaped parts of different lengths according to the present invention;

[0039] Figure 5 This is a left-side structural schematic diagram of an automatic feeding device for rod-shaped parts of different lengths according to the present invention;

[0040] Figure 6 This is a cross-sectional view of section AA in an automatic feeding device for rod-shaped parts of different lengths according to the present invention.

[0041] Figure 7 This is a cross-sectional view of section BB in an automatic feeding device for rod-like parts of different lengths according to the present invention.

[0042] Figure 8 This is a three-dimensional structural diagram of an automatic feeding device for rod-like parts of different lengths, concealing the first and third hopper side plates. Figure 1 ;

[0043] Figure 9 This is a three-dimensional structural diagram of an automatic feeding device for rod-like parts of different lengths, concealing the first and third hopper side plates. Figure 2 ;

[0044] Figure 10 This is a schematic diagram of the assembly structure of the hopper guiding mechanism, the feeding station seat, the first feeding mechanism, and the second feeding mechanism in an automatic feeding device for rod-like parts of different lengths according to this utility model. Figure 1 ;

[0045] Figure 11 This is a schematic diagram of the assembly structure of the hopper guiding mechanism, the feeding station seat, the first feeding mechanism, and the second feeding mechanism in an automatic feeding device for rod-like parts of different lengths according to this utility model. Figure 2 ;

[0046] Figure 12 This is a schematic diagram of the assembly structure of the hopper guiding mechanism, the feeding station seat, the first feeding mechanism, and the second feeding mechanism in an automatic feeding device for rod-like parts of different lengths according to this utility model. Figure 3 ;

[0047] Figure 13 This is a three-dimensional structural diagram of the workpiece alignment mechanism in an automatic feeding device for rod-like parts of different lengths, according to this utility model. Figure 1 ;

[0048] Figure 14 This is a three-dimensional structural diagram of the workpiece alignment mechanism in an automatic feeding device for rod-like parts of different lengths, according to this utility model. Figure 2 . Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0050] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0051] like Figures 1 to 6 As shown, this embodiment provides an automatic feeding device for rod-like parts of different lengths. The device mainly includes a frame 100, a hopper guiding mechanism 200, a feeding station 300, a first ejector mechanism 400, a second ejector mechanism 500, and a workpiece alignment mechanism 600. Its core is to realize the automatic and orderly feeding of rod-like parts of different lengths and diameters through an adjustable hopper in a hopper guiding mechanism 200 and a multi-stage ejector system, thus preparing for subsequent automated assembly processes (such as robotic gripping).

[0052] The frame 100 is welded from square tubing, providing stable support. The hopper guiding mechanism 200 is installed at an angle on top of the frame 100, and the rod-like part 001 rolls forward under gravity. The loading station 300 is located at the front end of the hopper, receiving the lifted parts. The first lifting mechanism 400 and the second lifting mechanism 500 lift the parts in stages, and the workpiece alignment mechanism 600 assists in centering and positioning the parts.

[0053] The automatic feeding device uses a robust frame 100 as the installation foundation and support for the entire equipment. The core material storage and guiding component, namely the hopper guiding mechanism 200, is fixedly installed on the frame 100. On the front plate of this mechanism, with reference to the flow direction of the rod-like part 001, three sets of key functional modules are symmetrically installed: a feeding station seat 300, a first top-feeding mechanism 400, and a second top-feeding mechanism 500. This symmetrical design ensures that the rod-like part is subjected to uniform force at both ends during conveying, avoiding jamming or skew.

[0054] The material guiding mechanism 200 has two symmetrically arranged material support plates 204 inside. These two support plates are not placed horizontally, but are arranged at an angle downwards from the rear end (feeding end) to the front end (discharge end), forming a slide that uses the weight of the parts for conveying. Operators can arrange a large number of rod-shaped parts 001 on it in sequence. A precisely defined gap is maintained between the front end of each material support plate 204 and the loading station seat 300. This gap is the key space for subsequent material lifting actions.

[0055] In use, the first ejector mechanism 400, serving as the first-stage ejector, is vertically positioned directly below the aforementioned gap. Driven by a cylinder, the first ejector block 403 at its top passes upwards through this gap, pushing the single rod-like part 001 at the foremost position upwards, allowing it to overcome gravity and accurately fall into the first station slot 304 of the downstream loading station 300. This process completes the transfer of the part from the silo to the first intermediate station.

[0056] The second-stage lifting mechanism 500, acting as the secondary lifting mechanism, is vertically positioned in the middle of the inner wall of the loading station 300. Its top is equipped with a second lifting block 503 and a third lifting block 504. When further conveying is required, this mechanism activates, lifting the part already in the first station slot 304 upwards and pushing it into the downstream second station slot 305; simultaneously, if there is a part in the second station slot 305, it will be simultaneously lifted and pushed into the third station slot 306. This achieves a relay-style forward movement of parts within the station.

[0057] The entire feeding process combines gravity-driven rolling supply with two-stage cylinder lifting and transfer. Parts are automatically fed to the lifting position by gravity in the hopper of the hopper guiding mechanism 200. Then, through the sequential or alternating actions of the first and second lifting mechanisms, they are lifted step by step and slid into the next designated work station slot, like climbing stairs, and finally reach the designated picking position to wait for the robot arm to grab them.

[0058] like Figures 1 to 10 As shown, in some embodiments, the hopper guiding mechanism 200 mainly includes a first hopper side plate 201, a second hopper side plate 202, a third hopper side plate 203, a material support plate 204, a rear baffle plate 205, and a front baffle plate 206. The second hopper side plate 202 slides on the frame's horizontal square tube 101 via bottom rollers 212. The screw adjustment mechanism 214 drives the side plate to move via a rotating handwheel 215. The guide rod mechanism 213 ensures parallel movement and can accommodate parts with lengths of 50-300mm.

[0059] The material support plate 204 is hinged at the front end via the first hinge shaft 207, and at the rear end via the height adjustment bolt assembly 209 within the first slot 208, achieving an inclination angle of 10-35° to control the rolling speed of the parts and enabling flexible adjustment of the inclination angle of the front and rear ends of the material support plate 204. Simultaneously, the front stop plate 206 is hinged via the second hinge shaft 210, and the locking bolt is adjusted within the second slot 211 to match the width of the feed opening to the diameter of the parts (5-20mm), preventing multiple materials from passing through simultaneously, thus achieving precise adjustment of the feed opening.

[0060] In use, the rod-shaped part 001 is manually placed into the hopper, and then the part rolls along the inclined support plate 204 to the front end. The front baffle plate 206 restricts only a single part from passing through the feed port, and the rear baffle plate 205 blocks subsequent parts to prevent accumulation. The workpiece sensing sensor 216 monitors the status of the workstation slot and triggers the ejector action.

[0061] Specifically, the hopper guiding mechanism 200 is a highly modular component. It includes a first hopper side plate 201, a second hopper side plate 202, and a third hopper side plate 203 mounted on the top of the frame 100. The first hopper side plate 201 and the second hopper side plate 202 form the main frame of the hopper. Inclined material support plates 204 are laterally fixed to their lower, opposite inner walls via an adjustable mounting structure. The inclination angle of the material support plates 204 is controlled between 10-35°. If the angle is too small, the parts will not roll smoothly; if the angle is too large, the parts will roll too fast, resulting in a large impact force, which can easily lead to disordered arrangement or damage.

[0062] In practical applications, a rear baffle plate 205 is installed at the rear end of the first hopper side plate 201 and the second hopper side plate 202, with its lower end extending to the rear end of the material support plate 204 to prevent parts from falling off during rolling. At the front end of the first hopper side plate 201 and the second hopper side plate 202, a front baffle plate 206 is installed, with its lower guide plate extending at a specific angle to form a height-restricted feeding port with the front end of the material support plate 204, ensuring that only one part can reach the top position at a time, playing a key role in single-piece separation.

[0063] As one of the preferred embodiments, such as Figure 10 As shown, to accommodate different diameters and ensure smooth feeding, this device is designed with a dual adjustment mechanism: adjustment of the support plate tilt angle and adjustment of the feed port width. Firstly, the front ends of the two material support plates 204 are hinged to the side plate via the first hinge shaft 207, acting as a pivot point. The rear ends are installed in the first slotted hole 208 of the side plate via a pin and height adjustment bolt assembly 209. By loosening the nut and moving the rear end of the support plate up and down in the first slotted hole 208, the tilt angle of the support plate can be continuously changed. After adjustment, the nut can be tightened.

[0064] On the other hand, the lower end of the front baffle plate 206 is hinged to the side plate via the second hinge shaft 210. Its upper end is installed in the second slotted hole 211 by a locking bolt. By loosening this bolt, the upper end of the front baffle plate 206 can be swung back and forth, thereby changing the gap between the lower guide plate and the front end of the support plate 204, thus achieving the purpose of controlling the width of the feed port, thereby accurately matching rod-like parts of different diameters and ensuring that only one part is released at a time.

[0065] As one of the preferred embodiments, such as Figure 2 , Figure 7 , Figure 8 and Figure 9 As shown, to accommodate rod-like parts 001 of different lengths, the second hopper side plate 202 is not completely fixed. Several rollers 212 are installed at its bottom, allowing it to slide easily left and right on the horizontal square tube 101 of the frame 100, like a drawer. The connection between the side plates is achieved through a guide rod mechanism 213 and at least one screw adjusting mechanism 214. The guide rod mechanism 213 and the second hopper side plate 202 are connected by a guide sleeve for guidance and support, and the screw adjusting mechanism 214 and the second hopper side plate 202 are connected by a screw nut threaded connection.

[0066] In use, the operator only needs to rotate the handwheel 215 at the end of the screw adjustment mechanism 214 to precisely and smoothly drive the second hopper side plate 202 to move via threaded transmission, thereby changing the distance between it and the first hopper side plate 201 to accommodate a series of rod-like parts of different lengths from short to long. The third hopper side plate 203 is usually linked to or fixed to the second hopper side plate.

[0067] In addition, such as Figure 11 and Figure 12 As shown, to achieve automated control, workpiece sensing sensors 216 are installed on the front end plates of the first hopper side plate 201 and the second hopper side plate 202, directly opposite the first workstation slot 304 and the final third workstation slot 306. The workpiece sensing sensors 216 can be conventionally known fiber optic sensors or proximity switches, used to detect whether a part is in place at a critical workstation. For example, when the third workstation slot 306 detects a part, it can signal the robot arm to pick it up; when the first workstation slot 304 is empty, it can trigger the first ejector mechanism 400 to operate, achieving fully automated production.

[0068] In some of these embodiments, such as Figure 1 , Figure 3 , Figure 6 , Figure 9 , Figure 10 and Figure 11 As shown, the loading station 300 mainly includes a connecting plate 301, a workpiece receiving plate 302, and a workpiece buffer pad 303. The top of the workpiece receiving plate 302 has a first station slot 304, a second station slot 305, and a third station slot 306, connected in a sawtooth shape, with each slot surface being an inclined surface. Depending on requirements, a workpiece buffer pad 303 can be added to the surface of the station slots to reduce impact noise and wear on the parts. After the part is lifted, it slides along the inclined surface into the next station slot. The sawtooth layout ensures that the part is transferred step by step. The third station slot 306 is the final unloading position for the robotic arm to grasp.

[0069] Specifically, the left and right loading stations 300 are synchronous receiving and temporary storage units. Their main body is the workpiece receiving plate 302, which is securely mounted on the inner wall of the front end plate of the material guiding mechanism 200 via connecting plates 301 at both ends. The top of the workpiece receiving plate 302 is not flat, but is meticulously machined with first, second, and third station slots 304, 305, and 306. These three slots are sequentially connected, forming a serrated arrangement. This layout provides a clear pushing path and clearance space for the top material block.

[0070] It is worth noting that the surface of each workstation slot is designed as a downward-sloping surface along the direction of part flow, with an inclination angle of 5-10°. This allows the parts, after being pushed in, to slide smoothly into the bottom of the slot and remain stably in place due to their own weight. To further protect the surface of the parts and reduce noise, all workstation slot surfaces are covered with a workpiece buffer pad 303. This buffer pad can be made of wear-resistant materials with a certain coefficient of friction, such as polyurethane, engineering plastics, or rubber.

[0071] In some of these embodiments, such as Figure 5 , Figure 10 , Figure 11 and Figure 12 As shown, each of the two symmetrical first material-lifting mechanisms 400 includes a mounting plate 401, a first cylinder 402, a first material-lifting block 403, a slider 404, and a linear guide rail 405. The mounting plate 401 is fixed to the inner wall of the front end of the hopper, and the first cylinder 402 drives the slider 404 to rise and fall along the linear guide rail 405.

[0072] The first top material block 403 is designed with a double-sloped triangular structure. The front slope guides the parts into the first work station slot 304, while the rear slope releases excess parts, allowing them to fall back to the front of the hopper. The lifting baffle 406 is installed at an angle to limit excessive lifting of parts. In use, the first cylinder 402 extends, pushing the first top material block 403 upward, lifting a single part at the feeding port into the first work station slot 304. After lifting, the cylinder retracts, and subsequent parts automatically fill the gap.

[0073] Specifically, each first lifting mechanism 400 uses a mounting plate 401 as its base and is fixed to the inner wall of the front end plate. A power source first cylinder 402 is mounted on the lower end of the mounting plate 401, and a vertical linear guide rail 405 is fixed to its inner end wall. The telescopic rod of the first cylinder 402 cooperates with the linear guide rail 405 through a slider 404 to ensure smooth and stable lifting movement without wobbling. A first lifting block 403 is fixed to the top of the slider 404.

[0074] The first top material block 403 is located in the narrow space between the mounting plate 401 and the front end of the hopper. Its top is designed as a downward sloping surface along the direction of part flow. This allows it to act like a wedge after lifting the part, prying it up and pushing it towards the first work station slot 304. The horizontal distance between the top of the sloping surface and the mounting plate 401 is deliberately designed to be smaller than the diameter of the rod-like part. This ingenious design ensures that the top material block can only push the foremost part during its ascent, without simultaneously driving the parts behind it, effectively preventing double material failure.

[0075] Furthermore, to further optimize the ejection process, the first ejector block 403 is designed to fit snugly against the mounting plate 401, and its top is a triangular structure with two inclined surfaces, one at the front and one at the back. The front inclined surface guides the parts to slide forward and upward into the work station slot, while the rear inclined surface helps to drop excess parts during lifting and prevents interference or collision with subsequently rolling parts when the first ejector block 403 descends.

[0076] Meanwhile, a lifting baffle 406 is added above the top block and the mounting plate. The lifting baffle 406 is also arranged at an angle and is suspended by bolts. Its function is to restrict the movement of the lifted parts to a specific height and path, preventing the parts from accidentally jumping off, rolling over or deviating from the predetermined trajectory during the lifting process, thus greatly improving the reliability of the operation.

[0077] In some of these embodiments, such as Figure 1 , Figure 2 , Figure 5 , Figure 11 and Figure 12 As shown, the second ejector mechanism 500 mainly includes a second cylinder 501 and an ejector plate 502. The top of the ejector plate 502 is integrally formed with a second ejector block 503 and a third ejector block 504. The second ejector block 503 corresponds to the first station slot 304, and the third ejector block 504 corresponds to the second station slot 305. The top of both is designed as an inclined surface.

[0078] Specifically, the second ejector mechanism 500 is directly fixed to the inner wall of the front end plate, and its power source is the second cylinder 501. The top of the telescopic rod of the second cylinder 501 is directly connected to a push plate 502. The top ends of the push plate 502 are integrally molded to form the second ejector block 503 and the third ejector block 504. This integrated design ensures the synchronization and structural strength of the two ejector blocks.

[0079] Similar to the first ejector block 403, the tops of these two ejector blocks 503 and 504 are also designed with inclined surfaces to ensure smooth ejection and guide the parts smoothly into the next workstation slot. A single second ejector mechanism 500 can manage the progress of parts in two workstation slots simultaneously, resulting in a compact structure and synchronized control.

[0080] In use, the second cylinder 501 simultaneously lifts the second lifting block 503 and the third lifting block 504, pushing the parts in the first work station slot 304 to the second work station slot 305, and at the same time pushing the parts in the second work station slot 305 to the third work station slot 306, thus realizing synchronous transfer between the two work stations.

[0081] In some of these embodiments, such as Figure 1 , Figure 8 , Figure 13 and Figure 14 As shown, to ensure that all rod-shaped parts are in a uniform and precise axial position at the final material handling station, facilitating repeated and accurate gripping by the robotic arm, this device also integrates a workpiece alignment mechanism 600. This workpiece alignment mechanism 600 mainly includes an L-shaped mounting plate 601, a third cylinder 602, an adapter block 603, and an alignment push plate 604. The alignment push plate 604 extends into the inner side of the hopper through a strip-shaped clearance hole 217, avoiding the workpiece sensing sensor 216 via the clearance through hole 605.

[0082] Specifically, the L-shaped mounting plate 601 is fixed to the outer side wall of the hopper, and the third cylinder 602 is mounted on it. An adapter block 603 is fixed to the telescopic rod of the third cylinder 602. The alignment push plate 604 is located within a specially designed strip-shaped clearance hole 217 on the front panel of the hopper. Its outer side wall is fixed to the adapter block 603, and its inner side wall faces the ends of the parts in the three workstation slots. The clearance through holes 605 at both ends of the alignment push plate 604 are to ensure that it does not collide with or interfere with the already installed workpiece sensing sensor 216 during operation.

[0083] When alignment is required, the third cylinder 602 is activated, and the alignment pusher 604 simultaneously pushes the parts in the first work station slot 304, the second work station slot 305 and the third work station slot 306 to move towards the opposite side, so that they are all close to the reference surface on the other side, such as the inner wall of the first hopper side plate 201, to complete axial positioning and ensure that the center line of the part is aligned with the gripping position of the robot arm.

[0084] Combination Figures 1 to 14 As shown, this utility model discloses an automatic feeding device for rod-shaped parts of different lengths, and its working process is as follows:

[0085] Step 1, Material preparation: Manually place the rod-shaped part 001 into the hopper. The part rolls along the inclined material support plate 204 to the front end. Due to the restriction of the front baffle plate 206, only a single part is to be lifted.

[0086] Step 2, initial ejection: The first cylinder 402 of the first ejection mechanism 400 is activated, and the first ejection block 403 ejects the part into the first work station slot 304.

[0087] Step 3, Secondary ejection: The second cylinder 501 of the second ejection mechanism 500 is activated, the second ejection block 503 pushes the part in the first station slot 304 to the second station slot 305, and the third ejection block 504 pushes the part in the second station slot 305 to the third station slot 306 (if it exists).

[0088] Step 4, cyclic material replenishment: The first ejector mechanism 400 ejects material again to fill the first work station slot 304, and the second ejector mechanism 500 operates again to fill all three work station slots with parts.

[0089] Step 5, Alignment and Retrieval: The workpiece alignment mechanism 600 is activated to push the parts into center, and the downstream robot arm retrieves the parts from each workstation slot. The workpiece sensing sensor 216 detects the retrieval status and triggers a new round of top-loading cycle.

[0090] In summary, this utility model, through its modular and adjustable design, achieves fully automated and multi-specification adaptability for loading rod-type parts, effectively solving the problems of low efficiency and high cost associated with manual loading. It is particularly suitable for assembling workpieces with large length-to-diameter ratios, such as piston rods and shaft parts, and has high potential for widespread application.

[0091] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0092] Secondly, the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0093] Finally, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic feeding device for rod-like parts of different lengths, characterized in that, include: The machine frame (100), the hopper guiding mechanism (200) fixedly installed on the machine frame (100), and the loading station seat (300), the first ejector mechanism (400) and the second ejector mechanism (500) respectively symmetrically installed on the front end plate of the hopper guiding mechanism (200), wherein: The material guide mechanism (200) has two symmetrically arranged material support plates (204) on the left and right sides, which are inclined downward from the rear end to the front end. Several rod-like parts (001) are placed on them in sequence, and the front end of each material support plate (204) is arranged with a gap between it and the loading station seat (300). The first top material mechanism (400) is vertically disposed in the gap between the front end of the corresponding material support plate (204) and the rear end of the loading station seat (300) first station groove (304), and a first top material block (403) is disposed on its top, which is used to push each rod part (001) upward one by one and fall into the downstream first station groove (304); The second top material mechanism (500) is vertically arranged in the middle of the inner side wall of the corresponding loading station seat (300). The top of the mechanism is provided with a second top material block (503) and a third top material block (504), which are used to push the corresponding rod-like parts (001) in the first station slot (304) and the second station slot (305) upward one by one and fall into the downstream second station slot (305) and the third station slot (306).

2. The automatic feeding device for rod-shaped parts according to claim 1, characterized in that, The hopper guiding mechanism (200) includes a first hopper side plate (201), a second hopper side plate (202), and a third hopper side plate (203) installed at left and right intervals on the top of the frame (100), wherein: The material support plate (204) is horizontally arranged on the inner sidewall of the lower part of the first hopper side plate (201) and the second hopper side plate (202), respectively. The inclination angle of the front and rear ends of the material support plate (204) is 10-35°. The inner sidewalls of the first hopper side plate (201) and the second hopper side plate (202) are respectively provided with rear baffles (205) vertically, and the lower end of the rear baffles (205) extends downward to the rear end of the material support plate (204). A front baffle plate (206) is vertically arranged on the inner sidewalls of the first hopper side plate (201) and the second hopper side plate (202) respectively. The guide plate at the lower end of the front baffle plate (206) is inclined downward and arranged close to the front end of the material support plate (204) to form a feeding port between the two that can only accommodate one rod-type part (001) to pass through.

3. The automatic feeding device for rod-shaped parts according to claim 2, characterized in that, The front ends of the two material support plates (204) are respectively hinged to the first hopper side plate (201) and the second hopper side plate (202) through the first hinge shaft (207), and the rear ends are respectively adjustablely installed in the first strip hole (208) on the first hopper side plate (201) and the second hopper side plate (202) through the pin shaft and the height adjustment bolt assembly (209), and the height adjustment bolt assembly (209) is fixed to the corresponding hopper side plate; The lower end of the front baffle plate (206) is hinged to the first hopper side plate (201) and the second hopper side plate (202) respectively via a second hinge shaft (210). The upper end is adjustablely installed in the second strip hole (211) on the first hopper side plate (201) and the second hopper side plate (202) via locking bolts. This is used to adjust the opening size of the feed port between the guide plate at the lower end of the front baffle plate (206) and the front end of the material support plate (204) to match the rod-type parts (001) of different diameters.

4. The automatic feeding device for rod-shaped parts according to claim 2, characterized in that, The second hopper side plate (202) can be slidably mounted on the corresponding horizontal square tube (101) of the frame (100) relative to the first hopper side plate (201) by means of several rollers (212) installed at the bottom; The first hopper side plate (201), the second hopper side plate (202) and the third hopper side plate (203) are connected by a number of spaced guide rod mechanisms (213) and at least one screw adjustment mechanism (214), and one end of the screw adjustment mechanism (214) is provided with a rotating handwheel (215).

5. The automatic feeding device for rod-shaped parts according to claim 2, characterized in that, Workpiece sensing sensors (216) are respectively provided on the front end plates of the first hopper side plate (201) and the second hopper side plate (202) at positions corresponding to the first work station slot (304) and the third work station slot (306).

6. The automatic feeding device for rod-shaped parts according to claim 1, characterized in that, Each of the aforementioned loading station seats (300) includes a connecting plate (301), a workpiece receiving plate (302), and a workpiece buffer pad (303), wherein: The front and rear ends of the workpiece receiving plate (302) are respectively fixedly installed on the inner side wall of the front end plate of the hopper guiding mechanism (200) through the connecting plate (301), and the top of the plate is provided with the first work station slot (304), the second work station slot (305) and the third work station slot (306) from the rear end to the front end. The first work station slot (304), the second work station slot (305) and the third work station slot (306) are connected in sequence and are arranged in a sawtooth shape. The surface of each work station slot is set as an inclined surface that is inclined downward along the flow direction of the rod-type part (001), and the workpiece buffer pad (303) is applied to the surface.

7. The automatic feeding device for rod-shaped parts according to claim 1, characterized in that, Each of the first ejector mechanisms (400) includes a mounting plate (401), a first cylinder (402), a first ejector block (403), a slider (404), and a linear guide rail (405), wherein: The outer end wall of the mounting plate (401) is fixedly installed on the inner side wall of the front end plate of the hopper guiding mechanism (200), and the first cylinder (402) is fixedly installed at its lower end. The vertically arranged linear guide rail (405) is fixedly installed on the inner end wall. The slider (404) is mounted on the telescopic rod of the first cylinder (402). The slider (404) is slidably mounted on the linear guide rail (405), and the first top material block (403) is fixedly mounted on its top. The first top material block (403) is located between the mounting plate (401) and the front end of the hopper guiding mechanism (200), and its top is set as an inclined surface arranged downward along the flow direction of the rod part (001), and the horizontal distance between the top of the inclined surface and the mounting plate (401) is less than the diameter of the rod part (001).

8. The automatic feeding device for rod-shaped parts according to claim 7, characterized in that, The first top material block (403) is arranged to fit the mounting plate (401), and its top is set as a triangular structure with two inclined slopes at the front and back; Furthermore, a lifting baffle (406) is provided above the first top material block (403) and the mounting plate (401) and is arranged inclined downward along the flow direction of the rod-like parts (001). The lifting baffle (406) is bolted to the inner side wall of the front end plate of the corresponding hopper guiding mechanism (200).

9. The automatic feeding device for rod-shaped parts according to claim 1, characterized in that, Each of the second ejector mechanisms (500) includes a second cylinder (501) and an ejector plate (502), wherein: The second cylinder (501) is fixedly installed on the inner side wall of the front end plate of the corresponding hopper guiding mechanism (200), and the top of its telescopic rod is fixedly connected to the bottom of the push plate (502). The top of both ends of the push plate (502) are respectively provided with an integrally formed second top material block (503) and third top material block (504), and the top of the second top material block (503) and the third top material block (504) are both provided with inclined surfaces arranged downward along the flow direction of the rod-like parts (001).

10. The automatic feeding device for rod-shaped parts according to claim 1, characterized in that, It also includes a workpiece alignment mechanism (600), which comprises an L-shaped mounting plate (601), a third cylinder (602), a transition block (603), and an alignment push plate, wherein: The L-shaped mounting plate (601) is fixedly installed on the outer side wall of the front end plate of the silo guide mechanism (200), and the third cylinder (602) is installed on it. The adapter block (603) is fixedly installed on the telescopic rod of the third cylinder (602). The alignment push plate is correspondingly disposed in the strip-shaped clearance hole (217) opened on the front end plate. Its outer side wall is fixedly connected to the adapter block (603), and its inner side wall is respectively facing the first work station slot (304), the second work station slot (305) and the third work station slot (306). Clearance through holes (605) are opened at both ends corresponding to the positions of the workpiece sensing sensor (216).

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