Cam-type feeding mechanism and automatic bar feeder

Abstract

The present application relates to a cam-type feeding mechanism and an automatic bar feeder. The cam-type feeding mechanism comprises a cam shaft rotatably mounted on a frame, a third cam coaxially fixedly connected to the second cam, a plurality of feeding brackets fixedly connected to the first shaft, a roller on the first connecting rod elastically pressing against the third cam, a second shaft rotatably arranged parallel to the first shaft on the frame, a rocker arm arranged on the second shaft, a bar conveying trough along the Y-axis direction provided on the frame of the automatic bar feeder, a push rod arranged on the bar conveying trough, the push rod moving along the length direction of the bar conveying trough for pushing the material, and the push rod being able to flip around the Y-axis direction for avoiding position. The cam-type feeding mechanism of the present invention uses a set of cam driving mechanisms to synchronously drive the feeding action of the bracket and the avoiding action of the push rod, thereby improving the efficiency of feeding; the push rod is arranged in a flip-up type avoiding position, which reduces the overall length of the feeder and improves the applicability of the feeder.

Description

Technical Field

[0001] The present application belongs to the technical field of bar feeders, and in particular relates to a cam-type feeding mechanism and an automatic bar feeder. Background Art

[0002] An automatic bar feeder is a feeding machine that works with equipment capable of continuously processing bar materials to automatically feed the material, thereby improving the equipment's processing efficiency and degree of automation. Most existing automatic bar feeders use a sliding unloading method, whereby the bar slides into the feeder's feeding station. This can easily cause the feeder to jam due to material slipping. Furthermore, the push rods of existing bar feeders often utilize an axial motion arrangement, resulting in a larger overall length and requiring a larger installation environment, making the feeder less practical. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in order to solve the deficiencies in the prior art, a cam-type feeding mechanism and an automatic bar feeder are provided, aiming to achieve at least one of the following technical effects: first, by setting a linked cam feeding mechanism and a flip-up push rod avoidance mechanism, the bar feeding and the push rod avoidance are realized synchronously, thereby improving the feeding efficiency; second, the overall length of the feeder is reduced, thereby improving the applicability of the feeder.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A cam-type feeding mechanism, comprising:

[0006] a frame, wherein a cam shaft is rotatably mounted on the frame, the cam shaft comprising a first shaft and a first cam and a second cam provided at both ends of the shaft, wherein a third cam is coaxially fixedly connected to the second cam;

[0007] A plurality of support racks for feeding materials are fixedly connected to the first rotating shaft;

[0008] The invention also includes a flip mechanism, wherein the flip mechanism includes a prism shaft arranged parallel to the first rotating shaft, a first connecting rod is rotatably connected to the prism shaft, a roller is rotatably provided on the first connecting rod, and the roller on the first connecting rod elastically presses against the third cam;

[0009] A second rotating shaft parallel to the first rotating shaft is rotatably provided on the frame, a second connecting rod is hinged to the upper end of the first connecting rod, the second connecting rod is used to drive the second rotating shaft to rotate, and a rocker arm is provided on the second rotating shaft.

[0010] Preferably, in a cam-type feeding mechanism of the present invention, the second connecting rod is configured as an elastic floating member for pushing the roller of the first connecting rod to elastically abut against the third cam.

[0011] Preferably, in a cam-type feeding mechanism of the present invention, a sleeve is rotatably sleeved on the first rotating shaft, an elastic telescopic rod is radially fixedly connected to the sleeve, and the lower end of the elastic telescopic rod is hinged to the frame.

[0012] An automatic bar feeder with a cam-type feeding mechanism, wherein a bar conveying trough along the Y-axis is provided on the frame, and a push rod is provided on the bar conveying trough, which moves along the length direction of the bar conveying trough for pushing the material, and the push rod can be flipped around the Y-axis direction for avoiding position;

[0013] The frame is provided with a linear drive mechanism, which is used to drive the push rod to move along the length direction of the bar conveying trough and directly push the bar to move to the discharge end of the bar conveying trough;

[0014] The silo is arranged on the frame with an adjustable tilt angle, and the supporting rack is arranged between the discharge port at the lower end of the silo and the bar conveying trough. The supporting rack is used to transport the bars on the silo to the bar conveying trough, and the discharge port at the lower end of the silo and the bottom plate of the bar conveying trough are provided with avoidance grooves for the support rack to pass through.

[0015] Preferably, in an automatic bar feeder of the present invention, the linear drive mechanism includes a guide rail structure along the length direction of the bar conveying trough and a slider assembly slidably arranged on the guide rail structure, and a synchronous belt drive device for driving the slider assembly to slide on the guide rail structure is also provided between the guide rail structure and the slider assembly.

[0016] Preferably, in an automatic bar feeder of the present invention, the guide rail structure is configured as a U-shaped profile, arc grooves are provided on both inner walls of the U-shaped profile, guide rods in the length direction are provided in the arc grooves, and rollers are provided for rolling between the two guide rods.

[0017] Preferably, in an automatic bar feeder of the present invention, the slider assembly includes a slide plate, the rotating shafts of the two rollers are rotatably connected to the slide plate, and the end of the slide plate close to the push rod is fixedly connected to a first top plate for pushing the push rod or the bar.

[0018] Preferably, in an automatic bar feeder of the present invention, the rocker arm includes a first rocker arm arranged at the discharge end of the bar conveying trough and a second rocker arm away from the discharge end of the bar conveying trough, a guide block is fixedly installed on the first rocker arm, and a guide hole is provided on the guide block for guiding the sliding of the push rod, and the push rod is slidably inserted in the guide hole, and a limiting block is fixedly connected to the second rocker arm, and a pin hole is provided on the limiting block.

[0019] Preferably, in an automatic bar feeder of the present invention, a push rod connecting assembly is provided at one end of the push rod close to the second rocker arm, the push rod connecting assembly includes a second top plate fixedly connected to the push rod, the upper end side wall of the second top plate is fixedly connected to a connecting block, the bottom surface of the connecting block is provided with a limiting groove perpendicular to the axial direction of the push rod, the upper surface of the slide is fixedly provided with a positioning strip for clamping in the limiting groove, and the end surface of the connecting block away from the second top plate is also fixedly connected with a limiting pin for inserting into the pin hole on the limiting block.

[0020] Preferably, in an automatic bar feeder of the present invention, a guide round block is further provided at the end of the connecting block away from the second top plate, a positioning block is fixedly provided on the upper surface of the slide, and a guide slot for guiding the sleeve to connect the guide round block is provided on the positioning block.

[0021] The beneficial effects of the present invention are:

[0022] (1) The cam-type feeding mechanism of the present invention synchronously drives the feeding action of the bracket and the avoidance action of the push rod through a set of cam driving mechanisms, thereby simplifying the action mechanism and improving the feeding efficiency;

[0023] (2) The push rod of the present invention is arranged as a flip-up type avoidance position, which reduces the overall length of the feeder and improves the applicability of the feeder compared to the traditional axial arrangement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The technical solution of the present application is further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the internal structure of the bar feeder according to an embodiment of the present application;

[0026] Figure 2 This is a schematic structural diagram of a cam-type feeding mechanism according to an embodiment of the present application;

[0027] Figure 3 yes Figure 2 Schematic diagram of the main structure;

[0028] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0029] Figure 5 yes Figure 3 Schematic diagram of the cross-section structure at the middle BB;

[0030] Figure 6 1 is a schematic cross-sectional view of a push rod connection assembly according to an embodiment of the present application;

[0031] Figure 7 This is a schematic structural diagram of a slider assembly according to an embodiment of the present application;

[0032] Figure 8 It is a schematic diagram of the external structure of the bar feeder according to an embodiment of the present application.

[0033] The reference numerals in the figures are:

[0034] Frame 10, cam shaft 11, turning mechanism 12, bar conveying trough 21, push rod 22, support frame 23, linear drive mechanism 24, guide rail structure 25, slider assembly 26, synchronous belt drive device 27, push rod connecting assembly 28, silo 30;

[0035] Sleeve 111, elastic telescopic rod 112, first rotating shaft 113, first cam 114, second cam 115, third cam 116, prism shaft 121, first connecting rod 122, second rotating shaft 123, second connecting rod 124, rocker arm 125, hinge base 126, slide plate 261, first top plate 262, positioning bar 263, second top plate 281, connecting block 282, limiting pin 283, positioning block 285;

[0036] A first rocker arm 1251 ; a second rocker arm 1252 , a guide block 1253 , and a limit block 1254 . DETAILED DESCRIPTION

[0037] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0040] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] Example

[0042] This embodiment provides a cam-type feeding mechanism, referring to Figure 1-5 , whose structure includes:

[0043] The frame 10 has a cam shaft 11 rotatably mounted on it, and the cam shaft 11 includes a first shaft 113, a first cam 114 and a second cam 115. The first cam 114 and the second cam 115 are rotatably mounted on the frame 10. The two ends of the first shaft 113 are rotatably mounted on the first cam 114 and the second cam 115 respectively. A rectangular mounting frame is fixedly connected to the first shaft 113, and the rectangular mounting frame is wrapped around the outside of the first shaft 113. A plurality of material support racks 23 for feeding are fixedly connected to the rectangular mounting rack, and a V-shaped groove is provided on the upper end of the material support rack 23 for positioning and loading rods.

[0044] Preferably, a cam-type feeding mechanism of this embodiment is further provided with a first drive motor and a sprocket chain transmission mechanism on the frame 10, the small sprocket of the sprocket chain transmission mechanism is fixedly connected to the power output shaft of the first drive motor, the large sprocket of the sprocket chain transmission mechanism is coaxially fixedly connected to the first cam 114, and the first drive motor drives the cam shaft 11 to rotate through the sprocket chain transmission mechanism.

[0045] Preferably, a cam-type loading mechanism of this embodiment has a sleeve 111 rotatably sleeved on the first rotating shaft 113, a avoidance groove is provided at the bottom of the rectangular mounting frame, an elastic telescopic rod 112 is radially fixedly connected to the sleeve 111, and the lower end of the elastic telescopic rod 112 passes through the avoidance groove and is hinged to the frame 10. When the first rotating shaft 113 rotates, under the limiting action of the elastic telescopic rod 112, the V-groove of the support rack 23 is always facing upwards, which is used for stable conveying of rods.

[0046] Preferably, a cam-type feeding mechanism of this embodiment further includes a flip mechanism 12, which includes a prism shaft 121 arranged parallel to the first rotating shaft 113, a Z-shaped first connecting rod 122 rotatably connected to the prism shaft 121, a third cam 116 coaxially fixedly connected to the second cam 115, a roller rotatably provided on the first connecting rod 122, the roller on the first connecting rod 122 presses on the third cam 116, and the lower end of the first connecting rod 122 is connected to the frame 10. A tension spring is provided, which is used to pull the roller of the first connecting rod 122 to abut against the third cam 116. A rotating shaft mounting frame is provided on the frame 10, and a second rotating shaft 123 parallel to the first rotating shaft 113 is rotatably provided on the rotating shaft mounting frame. A hinge seat 126 is fixedly connected to the second rotating shaft 123. The upper end of the first connecting rod 122 is hinged to the second connecting rod 124, and the upper end of the second connecting rod 124 is hinged to the hinge seat 126. The second rotating shaft 123 is fixedly connected to the rocker arm 125.

[0047] Preferably, in a cam-type feeding mechanism of this embodiment, an elastic floating part is provided on the second connecting rod 124. Specifically, the second connecting rod 124 includes a first support rod hinged to the hinge seat 126 and a second support rod hinged to the upper end of the first connecting rod 122. The first support rod is provided with a waist hole, and the second support rod is provided with a pin inserted in the waist hole to realize the telescopic connection between the first support rod and the second support rod. A compression spring is provided between the first support rod and the second support rod for pushing the first support rod and the second support rod to extend.

[0048] During actual operation, the second cam 115 drives the third cam 116 to rotate synchronously. When the flange of the third cam 116 squeezes the roller of the first connecting rod 122, the first connecting rod 122 rotates around the prism shaft 121, pushing the second connecting rod 124 to rotate upward, thereby pushing the second rotating shaft 123 to rotate, and the rocker arm 125 to move downward. When the circumferential surface of the third cam 116 contacts the roller of the first connecting rod 122, under the action of the tension spring, the first connecting rod 122 rotates in the opposite direction around the prism shaft 121, pulling the second connecting rod 124 downward, thereby pulling the second rotating shaft 123 to rotate, and the rocker arm 125 rotates upward.

[0049] This embodiment also discloses an automatic bar feeder with a cam-type feeding mechanism, referring to Figure 1-8 The frame 10 includes a support frame and a workbench. The support frame is provided with a strip hole in the Z-axis direction. The two ends of the workbench are locked on the strip holes on the support frame by bolts to adjust the height of the workbench to adapt to the feeding height of the processing machine.

[0050] A V-shaped bar conveying trough 21 along the Y-axis direction is provided on the top of the workbench, and a push rod 22 is provided on the bar conveying trough 21. The push rod 22 moves along the length direction of the bar conveying trough 21 for pushing the material. The push rod 22 can flip around the Y-axis direction to avoid the position when the bar is loaded into the bar conveying trough 21. A linear drive mechanism 24 is also provided on the top of the workbench, which is used to drive the push rod 22 to move along the length direction of the bar conveying trough 21 and directly push the bar to the discharge end of the bar conveying trough 21.

[0051] In this embodiment, the linear drive mechanism 24 includes a guide rail structure 25 arranged along the length direction of the bar conveying trough 21 and a slider assembly 26 slidably arranged on the guide rail structure 25. A synchronous belt drive device 27 is also provided between the guide rail structure 25 and the slider assembly 26 for driving the slider assembly 26 to slide on the guide rail structure 25. The synchronous belt drive device 27 includes a servo motor and a synchronous belt transmission mechanism that moves parallel to the length direction of the bar conveying trough 21. The active synchronous wheel of the synchronous belt transmission mechanism is fixedly connected to the power output shaft of the servo motor.

[0052] Preferably, in an automatic bar feeder of the present embodiment, the guide rail structure 25 is configured as a U-shaped profile, arc grooves are provided on the two inner walls of the U-shaped profile, guide rods in the length direction are provided in the arc grooves, two rollers are provided for rolling in parallel between the two guide rods, the slider assembly 26 includes a slide plate 261, the rotating shafts of the two rollers are rotatably connected to the slide plate 261, the synchronous belt of the synchronous belt transmission mechanism is fixedly connected to the slide plate 261 at one point, driving the slide plate 261 to slide on the guide rail structure 25, and the end of the slide plate 261 close to the push rod 22 is fixedly connected to a first top plate 262 for pushing the push rod or the bar.

[0053] Preferably, in an automatic bar feeder of this embodiment, the rocker arm 125 includes a first rocker arm 1251 arranged at the discharge end of the bar conveying trough 21 and a second rocker arm 1252 away from the discharge end of the bar conveying trough 21, a guide block 1253 is fixedly mounted on the first rocker arm 1251, and a guide hole is provided on the guide block for guiding the sliding of the push rod 22, and the push rod 22 is slidably inserted in the guide hole, and a limiting block 1254 is fixedly connected to the second rocker arm 1252, and the limiting block 1254 is provided with a pin hole whose length direction is parallel to the push rod 22.

[0054] Preferably, in the automatic bar feeder of this embodiment, a buffer spring is further provided at one end of the U-shaped profile close to the second rocker arm 1252, which plays a limiting buffering role when the slide plate 261 moves to the end.

[0055] Preferably, in an automatic bar feeder of this embodiment, a push rod connecting assembly 28 is provided at one end of the push rod 22 close to the second rocker arm 1252, and the push rod connecting assembly 28 includes a second top plate 281 fixedly connected to the push rod 22, and a connecting block 282 is fixedly connected to the side wall of the upper end of the second top plate 281, and the bottom surface of the connecting block 282 is provided with a limiting groove perpendicular to the axial direction of the push rod 22, and a positioning strip 263 for being clamped in the limiting groove is fixedly provided on the upper surface of the slide 261, and the end surface of the connecting block 282 away from the second top plate 281 is also fixedly connected to a limiting pin 283 for being inserted into the pin hole on the limiting block.

[0056] Preferably, in an automatic bar feeder of this embodiment, a radial ball head locking pin is provided in the pin hole of the limit block 1254, and an annular groove is provided on the cylindrical surface of the limit pin 283. When the limit pin 283 is inserted into the pin hole of the limit block 1254, the ball head locking pin is clamped in the annular groove and locked in position.

[0057] Preferably, in an automatic bar feeder of this embodiment, a groove is further provided at the end of the connecting block 282 away from the second top plate 281, a guide round block is provided in the groove, a positioning block 285 is fixedly provided on the upper surface of the slide plate 261, and a guide slot for clamping the guide round block is provided on the positioning block 285.

[0058] When the slider assembly 26 moves to the right end (close to the end of the buffer spring), the end of the limit pin 283 does not exceed the end face of the pin hole of the limit block 1254, and the second rocker arm 1252 rotates to contact with the connecting block 282. The slider assembly 26 continues to move to the right end, and the guide round block is inserted into the guide slot for guiding. The limit pin 283 is inserted into the pin hole of the limit block 1254 to complete the connection between the rod connecting assembly 28 and the second rocker arm 1252. At this time, the second rocker arm 1252 flips upward, which can drive the push rod 22 to flip upward, realizing the avoidance action of bar loading.

[0059] An automatic bar feeder of the present embodiment also includes a hopper 30 for loading multiple bars. The hopper 30 is arranged on the frame 10 with an adjustable tilt angle. Specifically, the hopper 30 is hinged on the workbench, and two support rods are hinged at the bottom of the hopper 30. The lower ends of the two support rods are connected by a round rod. A serrated groove in the height direction is provided on the side wall of the workbench. By adjusting the round rod to be placed in the serrated groove at different heights, the tilt angle of the hopper 30 can be adjusted, and the bars roll to the discharge port at the lower end by their own gravity.

[0060] The support rack 23 is arranged between the lower end discharge port of the silo 30 and the bar conveying trough 21. The support rack 23 is used to transport the bars on the silo 30 to the bar conveying trough 21. The lower end discharge port of the silo 30 and the bottom plate of the bar conveying trough 21 are provided with avoidance grooves for the support rack 23 to pass through.

[0061] The automatic bar feeder of this embodiment further includes a flip cover arranged on the top of the frame 10 for safety protection and dust prevention.

[0062] It should be noted that the angle between the flange of the third cam 116 and the second cam 115 should be maintained as follows: when the support rack 23 is located below the discharge port of the silo 30, the circumferential surface of the third cam 116 contacts the roller of the first connecting rod 122, and the rocker arm 125 is located below and no deflection occurs. When the support rack 23 lifts the bar and moves it from the discharge port of the silo 30 to the bar conveying trough 21, the flange of the third cam 116 contacts the roller of the first connecting rod 122, and the rocker arm 125 drives the push rod 22 to flip upward, thereby realizing the avoidance of bar feeding.

[0063] The working process of the present invention is:

[0064] Step 1: Place multiple bars in a single layer in the hopper 30, the first drive motor rotates to drive the cam shaft 11 to rotate, and the bracket 23 lifts up from the bottom of the discharge port of the hopper 30 to lift the bars from the hopper 30 and move them to the bar conveying trough 21. At the same time, the flange of the third cam 116 contacts the roller of the first connecting rod 122, and the rocker arm 125 drives the push rod 22 to flip upward to achieve bar feeding and avoiding position. When the bars are placed in the bar conveying trough 21, the bracket 23 deflects downward and moves to the bottom of the bar conveying trough 21. The servo motor starts to drive the first top plate 262 of the slider assembly 26 to quickly push the bars to the discharge end of the bar conveying trough 21, and then the slider assembly 26 returns to its original position.

[0065] Step 2: The cam shaft 11 continues to rotate until the flange of the third cam 116 contacts the roller of the first connecting rod 122. The cam shaft 11 stops rotating, the circumferential surface of the third cam 116 contacts the roller of the first connecting rod 122, the rocker arm 125 is located at the bottom, and the push rod contacts the bar conveying trough 21.

[0066] Step 3: The servo motor starts again, driving the slider assembly 26 to move closer to one end of the first rocker arm 1251, the push rod connecting assembly 28 is disengaged from the second rocker arm 1252, and the push rod 22 continues to push the bar forward to achieve feeding action;

[0067] Step 4: After the feeding is completed, the slider assembly 26 moves to the right end (the end close to the buffer spring), the end of the limit pin 283 does not exceed the end surface of the pin hole of the limit block 1254, the guide round block is inserted into the guide slot for guidance, and the limit pin 283 is inserted into the pin hole of the limit block 1254, completing the connection between the rod connecting assembly 28 and the second rocker arm 1252;

[0068] Repeat the above steps 1 to 4 to achieve cyclic loading action.

[0069] Based on the above-mentioned ideal embodiments of this application, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the scope of the technical concept of this application. The technical scope of this application is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An automatic bar feeder with a cam-type feeding mechanism, characterized in that: include: A frame (10), wherein a cam shaft (11) is rotatably mounted on the frame (10), the cam shaft (111) comprising a first shaft (113) and a first cam (114) and a second cam (115) provided at both ends of the shaft, wherein a third cam (116) is coaxially fixedly connected to the second cam (115); A plurality of material feeding brackets (23) are fixedly connected to the first rotating shaft (113); The turning mechanism (12) further comprises a flipping mechanism (12), the flipping mechanism (12) comprising a prism shaft (121) arranged parallel to the first rotating shaft (113), a first connecting rod (122) rotatably connected to the prism shaft (121), a roller rotatably arranged on the first connecting rod (122), and the roller on the first connecting rod (122) elastically pressing against the third cam (116); A second rotating shaft (123) parallel to the first rotating shaft (113) is rotatably provided on the frame (10); a second connecting rod (124) is hingedly connected to the upper end of the first connecting rod (122); the second connecting rod (124) is used to drive the second rotating shaft (123) to rotate; and a rocker arm (125) is provided on the second rotating shaft (123); The frame (10) is provided with a bar conveying trough (21) along the Y-axis direction, and a push rod (22) is provided on the bar conveying trough (21). The push rod (22) moves along the length direction of the bar conveying trough (21) for pushing materials, and the push rod (22) can be turned around the Y-axis direction for avoiding position; The frame (10) is provided with a linear drive mechanism (24), and the linear drive mechanism (24) is used to drive the push rod (22) to move along the length direction of the bar conveying trough (21) and directly push the bar to move to the discharge end of the bar conveying trough (21); A silo (30), wherein the silo (30) is arranged on the frame (10) with an adjustable tilt angle, and the supporting frame (23) is arranged between the discharge port at the lower end of the silo (30) and the bar conveying trough (21), and the supporting frame (23) is used to transport the bars on the silo (30) into the bar conveying trough (21), and a avoidance groove for the support frame (23) to pass through is provided on the bottom plate of the discharge port at the lower end of the silo (30) and the bar conveying trough (21); The rocker arm (125) includes a first rocker arm (1251) provided at the discharge end of the bar conveying trough (21) and a second rocker arm (1252) away from the discharge end of the bar conveying trough (21), wherein a guide block is fixedly mounted on the first rocker arm (1251), wherein the guide block is provided with a guide hole for guiding the push rod (22) to slide, and the push rod (22) is slidably inserted in the guide hole, and a limit block is fixedly connected to the second rocker arm (1252), and the limit block is provided with a pin hole; The push rod (22) is provided with a push rod connecting assembly (28) at one end close to the second rocker arm (1252), and the push rod connecting assembly (28) includes a second top plate (281) fixedly connected to the push rod (22), and a connecting block (282) is fixedly connected to the side wall of the upper end of the second top plate (281), and the bottom surface of the connecting block (282) is provided with a limiting groove perpendicular to the axial direction of the push rod (22). The linear drive mechanism (24) includes a plurality of rods and a plurality of rods. A guide rail structure (25) extending in a certain direction and a slider assembly (26) slidably arranged on the guide rail structure (25), the slider assembly (26) comprising a slide plate (261), the upper surface of the slide plate (261) being fixedly provided with a positioning bar (263) for being engaged in a limiting groove, the end surface of the connecting block (282) away from the second top plate (281) being also fixedly connected with a limiting pin (283) for being inserted into a pin hole on the limiting block, and an annular groove being provided on the cylindrical surface of the limiting pin (283).

2. The automatic bar feeder with a cam-type feeding mechanism according to claim 1, characterized in that: The second connecting rod (124) is configured as an elastic floating member, used to push the roller of the first connecting rod (122) to elastically abut against the third cam (116).

3. The automatic bar feeder with a cam-type feeding mechanism according to claim 2, characterized in that: A sleeve (111) is rotatably sleeved on the first rotating shaft (113), an elastic telescopic rod (112) is radially fixedly connected to the sleeve (111), and the lower end of the elastic telescopic rod (112) is hinged on the frame (10).

4. The automatic bar feeder with a cam-type feeding mechanism according to claim 3, characterized in that: A synchronous belt driving device (27) for driving the slider assembly (26) to slide on the guide rail structure (25) is also provided between the guide rail structure (25) and the slider assembly (26).

5. The automatic bar feeder with a cam-type feeding mechanism according to claim 4, characterized in that: The guide rail structure (25) is configured as a U-shaped profile, arcuate grooves are provided on the two inner walls of the U-shaped profile, guide rods in the length direction are provided in the arcuate grooves, and a roller is provided between the two guide rods for rolling.

6. The automatic bar feeder with a cam-type feeding mechanism according to claim 5, characterized in that: The rotating shafts of the two rollers are rotatably connected to a slide plate (261), and one end of the slide plate (261) close to the push rod (22) is fixedly connected to a first top plate (262) for pushing a push rod or a rod.

7. The automatic bar feeder with a cam-type feeding mechanism according to claim 6, characterized in that: The end of the connecting block (282) away from the second top plate (281) is further provided with a guide round block, and a positioning block (285) is fixedly provided on the upper surface of the slide plate (261), and the positioning block (285) is provided with a guide slot for guiding the sleeve to connect the guide round block.

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