Self-orienting low noise feeding device

Abstract

The application discloses a self-orientation low-noise feeding device, which comprises a feeding section one, the tail end of the feeding section one is provided with a feeding channel for feeding workpieces; a feeding section two, the feeding section two is provided with a transmission channel communicated with the feeding channel, the feeding section two pushes the workpieces along the transmission channel through a driving pushing unit and selects the direction of the workpieces, the front end or the position close to the front end of the driving pushing unit is provided with a taper a, and the arc radius of the transmission channel is b; a conveying orientation section, the conveying orientation section is provided with an orientation track communicated with the transmission channel, the conveying orientation section and the transmission channel are provided with an included angle c, and the inner walls of the orientation track form an included angle d, the structure design of the application is reasonable, the workpieces can be automatically oriented with the large end upward and the small end downward through the device, the orientation success rate is high, the device can adapt to the machining speed of the machine tool, and the feeding efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of valve feeding technology, and in particular to a self-directional, low-noise feeding device. Background Technology

[0002] Before CNC machining of hardware workpieces (such as fire extinguisher valves), automated loading of the workpieces is required, for example, Figure 1 The workpiece shown is being machined. The left end of the workpiece is the large end 101, with a diameter of 35.1 mm, and the right end is the small end 102, with a diameter of 7.6 mm. The workpiece needs to be loaded and adapted to the rapid machining mode of CNC machining.

[0003] Using a traditional vibratory feeder to feed the workpiece results in high-frequency and highly penetrating noise due to the collisions between multiple workpieces placed in the feeder simultaneously. Noise levels reached approximately 120 decibels in a 20-30 square meter space. Furthermore, the workpieces are difficult to align during the feeding process. Because the vibratory feeder continuously selects each workpiece, a single workpiece may require multiple selections, leading to a low success rate (less than 20%). This continuous selection process also causes wear and tear on the workpieces and makes it unsuitable for rapid feeding requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a self-orienting low-noise feeding device in light of the current state of the technology. This device not only has low noise during the feeding process, but also can automatically orient the workpiece with the large end facing up and the small end facing down, with a high orienting success rate. At the same time, it can adapt to the speed of machine tool processing and improve the feeding efficiency.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A self-directional, low-noise feeding device, comprising

[0007] The first feeding section has a feeding channel at its tail end for feeding workpieces.

[0008] The second feeding section has a transmission channel connected to the feeding channel. The second feeding section pushes the workpiece along the transmission channel and selects the direction of the workpiece through a driving push unit. The front end or near the front end of the driving push unit has a taper a, and the arc radius of the transmission channel is b.

[0009] A conveying directional section has a directional track communicating with a transmission channel, the conveying directional section and the transmission channel having an included angle c, and the inner walls of the directional track forming an included angle d;

[0010] The directional rail feeding unit is driven to rotate by a driving component. The directional rail feeding unit has a plurality of feeding feet distributed on it for receiving workpieces in the directional rail. At least one feeding foot is provided with a pin assembly for positioning the central axis of the workpiece.

[0011] The discharge unit has a discharge track for receiving workpieces transferred by the directional feeding unit.

[0012] Preferably, it also includes an auxiliary concentric unit, which includes a cylinder, the cylinder being connected to a support top frame via a connecting shaft, the support top frames being connected to an auxiliary track co-connected with the directional track, the front end of the support top frame being connected to a directional frame, and the directional frame having an adjustment space arranged inside to facilitate the passage of the loading foot.

[0013] Preferably, the drive pushing unit includes a support frame, on which a second cylinder is connected. The front end of the second cylinder is connected to a pusher cylinder, and the front end of the pusher cylinder forms a conical structure with a taper a.

[0014] Preferably, the taper a has an angle range of 130°~140°, the arc radius b has a value range of 30mm~40mm, the included angle c has an angle range of 20°~40°, and the included angle d has an angle range of 115°~125°.

[0015] Preferably, the taper a has an angle range of 136°, the arc radius b has a value range of 35.1 mm, the included angle c has an angle range of 30°, and the included angle d has an angle range of 120°.

[0016] Preferably, the second feeding section is provided with a guide block connected to the support frame. The guide block is provided with an arc-shaped groove for accommodating the forward and backward extension and retraction of the pusher cylinder. The guide block is vertically connected to a fixed block group, and a conveying cylinder is connected between the fixed block groups. The outer end of the fixed block group away from the guide block is connected and fixed to the conveying and directional section.

[0017] Preferably, the conveying and directional section includes a limiting frame, the directional track is arranged inside the limiting frame, a cylinder is connected to the upper end of the limiting frame, and the outer end of the limiting frame abuts against the supporting top frame.

[0018] Preferably, the directional rail feeding unit includes a bracket for fixing the driving component, an indexing table connected to the driving component, and a feeding plate connected to the indexing table. The feeding plate is provided with four feeding feet circumferentially around the central axis, and each feeding foot is provided with a central hole for connecting to the ejector pin assembly.

[0019] Preferably, the ejector pin assembly includes an ejector pin body that can be matched and inserted with the central axis of the workpiece, and an elastic return member sleeved on the bottom of the ejector pin body. The ejector pin body is coaxially inserted into the feeding foot, and the bottom of the ejector pin body is provided with a fixing part that facilitates the sleeve of the elastic return member. The fixing part is fixed in the central hole.

[0020] Preferably, the discharge unit includes a discharge track arranged in the same direction as the rotation direction of the loading foot and a protective cover plate connected to the discharge track. A rotation space capable of accommodating the rotation of the loading base plate is arranged between adjacent protective covers. A transmission screw unit for limiting the direction of the workpiece is arranged separately in the discharge track.

[0021] Compared with the prior art, the advantages of the present invention are: by using this device to load workpieces, not only is the noise reduced during the loading process, but it can also automatically achieve the self-orientation requirement of the large end facing up and the small end facing down. At the same time, the orientation success rate is high, which can effectively adapt to the speed of machine tool processing and improve loading efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the workpiece feeding structure of the device of the present invention;

[0023] Figure 2 This is a schematic diagram of the structural state of the device of the present invention;

[0024] Figure 3 This is a schematic diagram of the second structural state of the device of the present invention;

[0025] Figure 4 This is a schematic diagram of the three structural states of the device of the present invention;

[0026] Figure 5 This is a schematic diagram of the fourth structural state of the device of the present invention;

[0027] Figure 6 This is a schematic diagram of the fifth structural state of the device of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the auxiliary concentric unit of the present invention;

[0029] Figure 8 This is a schematic diagram of the discharge unit structure of the present invention;

[0030] Figure 9 This is a schematic diagram of the ejector pin assembly structure of the device of the present invention;

[0031] Figure 10 This is a simplified angular view of the structure of the device of the present invention in state six;

[0032] Figure 11 This is a simplified angular view of the structural state seven of the device of the present invention;

[0033] Figure 12 This is a simplified angular view of the structural state eight of the device of the present invention.

[0034] Attached reference numerals: 1. Feeding section one; 2. Feeding section two; 3. Conveying and directional section; 4. Directional guide rail unit; 5. Discharge unit; 6. Auxiliary concentric unit; 10. Feeding channel; 11. Feeding structure; 12. Material selection structure; 13. Sliding frame; 14. Guide rail; 15. Lower inclined plate; 16. Middle inclined plate; 17. Hopper; 18. Inclined push plate; 20. Transmission channel; 21. Drive and push unit; 22. Support frame; 23. Cylinder two; 24. Push cylinder; 25. Conical structure; 26. Guide block; 27. Arc-shaped groove; 28. Fixing block 29. Conveyor cylinder; 30. Orientation track; 31. Limiting frame; 40. Drive component; 41. Feeding foot; 42. Ejector pin assembly; 43. Support; 44. Indexing table; 45. Feeding base plate; 420. Ejector pin body; 421. Fixing part; 422. Elastic recovery component; 50. Discharge track; 51. Protective cover plate; 52. Transmission screw unit; 520. Motor; 521. Twin screw; 522. Gear set; 60. Cylinder; 61. Connecting shaft; 62. Support top frame; 63. Orientation frame; 64. Adjustment space; 620. Auxiliary track. Detailed Implementation

[0035] The following drawings disclose several embodiments of the present invention. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0036] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0037] Furthermore, in addition to indicating orientation or positional relationship, the aforementioned terms may also be used to indicate other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0038] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral constructions; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts. The connection methods described herein are prior art, without any modifications, and are common knowledge to those skilled in the art. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms, and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, such a combination should be considered nonexistent and not within the scope of protection claimed by this invention.

[0040] like Figures 1 to 12 As shown, the present invention provides a self-directional low-noise feeding device, including...

[0041] The feeding section 1 has a feeding channel 10 at its tail end for feeding workpieces;

[0042] The second feeding section 2 has a transmission channel 20 that is connected to the feeding channel 10. The second feeding section 2 pushes the workpiece along the transmission channel 20 and selects the direction of the workpiece through a driving push unit 21. The front end or near the front end of the driving push unit 21 has a taper a, and the arc radius of the transmission channel 20 is b.

[0043] The conveying directional section 3 has a directional track 30 that communicates with the transmission channel 20. The conveying directional section 3 and the transmission channel 20 have an included angle c, and the inner walls of the directional track 30 have an included angle d.

[0044] The directional rail feeding unit 4 is driven to rotate by a driving member 40. The directional rail feeding unit 4 is provided with a plurality of feeding feet 41 for receiving workpieces in the directional rail 30. At least one feeding foot 41 is provided with a pin assembly 42 for positioning the central axis of the workpiece.

[0045] The discharge unit 5 has a discharge track 50 for receiving workpieces transferred by the directional rail feeding unit 4;

[0046] The feeding section 1 includes a feeding structure 11 with a V-shaped hopper 17 and a material selection structure 12. The material selection structure 12 is connected to the feeding channel 10. The feeding structure 11 is used to feed the disorderly workpieces in the hopper 17 into the material selection structure 12 one by one through the cylinder 60 pushing the inclined push plate 18. The material selection structure 12 is used to arrange the workpieces in the required posture. After the arrangement is completed, they are transported one by one into the feeding channel 10 for orientation.

[0047] The material selection structure 12 is driven by the cylinder 60 to slide the sliding frame 13 up and down along the guide rail 14. During each upward sliding of the sliding frame 13, the workpiece on the lower inclined plate 15 is transported to the middle inclined plate 16, and the workpiece on the middle inclined plate 16 is finally sent into the feeding channel 10.

[0048] After the workpiece is fed into the feeding channel 10 by the feeding section 1, it will enter the transmission channel 20 of the feeding section 2. At this time, the drive pushing unit 21 will use the taper a and the arc radius b as the set reference to drive the workpiece to be pushed forward with the large end facing down, and then pushed into the directional track 30 of the conveying directional section 3. Then, using the angle c between the conveying directional section 3 and the transmission channel 20 and the angle d formed between the inner wall of the directional track 30, the workpiece is dropped with the large end facing down. The workpiece is unloaded to the bottom of the directional track 30 and placed on any feeding foot 41 of the directional rail feeding unit 4. At the same time, the corresponding ejector pin assembly 42 will be inserted into the corresponding feeding foot 41. When the drive component 40 is driven to rotate, the workpiece will change from an inclined state to a vertical state with the large end facing up and the small end facing down, and finally enter the discharge track 50 to achieve the final workpiece orientation, which facilitates the processing and assembly of the workpiece's assembly holes.

[0049] In this embodiment, an auxiliary concentric unit 6 is also included. The auxiliary concentric unit 6 includes a cylinder 60, which is connected to a support top frame 62 via a connecting shaft 61. An auxiliary track 620 connected to the directional track 30 is connected between the support top frames 62. A directional frame 63 is connected to the front end of the support top frame 62. An adjustment space 64 is arranged inside the directional frame 63 to facilitate the passage of the feeding foot 41.

[0050] The auxiliary track 620 is inclined and connected to the bottom of the directional track 30, which facilitates the workpiece falling along the direction of the directional track 30 and into the auxiliary track 620. Then, the cylinder 60 lifts the workpiece upward, and the supporting top frame 62 drives the auxiliary track 620 to move upward in sync. The directional frame 63 is also lifted up under the action of the supporting top frame 62, realizing the height difference. During the lifting process, the workpiece falling into the auxiliary track 620 is aligned, so that the center of the workpiece can be timely and effectively matched with the ejector pin assembly 42, which facilitates the transportation of the directional track feeding unit 4.

[0051] In this embodiment, the drive pushing unit 21 includes a support frame 22, on which a cylinder 6023 is connected. The front end of the cylinder 6023 is connected to a pusher cylinder 24, and the front end of the pusher cylinder 24 forms a conical structure 25 with a taper a. The support frame 22 is used to fix the position of the cylinder 6023. The pusher cylinder 24 at the front end of the cylinder 6023 is arranged along the direction of the transmission channel 20. When the cylinder 6023 is started, it will push the pusher cylinder 24 forward. During the pushing of the workpiece, the taper a is formed by the conical structure 25 at the front end of the pusher cylinder 24. Combined with the arc radius b of the transmission channel 20, the orientation of the workpiece in the transmission channel 20 can be effectively limited: the large end is facing down and the small end is facing up, which facilitates the workpiece to enter the conveying orientation section 3 and be conveyed along the orientation track 30.

[0052] In this embodiment, the taper a has an angle range of 130°~140°, the arc radius b has a value range of 30mm~40mm, the included angle c has an angle range of 20°~40°, and the included angle d has an angle range of 115°~125°. Preferably, the above angles are limited to a range. By limiting the above range values, the structure set according to the range values ​​can effectively ensure the purpose of selecting the large and small ends of the workpiece and its orientation.

[0053] In this embodiment, the taper a has an angle range of 136°, the arc radius b has a value range of 35.1mm, the included angle c has an angle range of 30°, and the included angle d has an angle range of 120°.

[0054] By setting the taper a at the front end of the pusher cylinder 24 and the arc radius b of the transmission channel 20, the direction of the large and small ends of the workpiece can be precisely defined. After defining the large and small ends, by setting the angle c between the conveying orientation section 3 and the transmission channel 20 and the angle d between the inner wall of the orientation track 30, the orientation of the workpiece on the orientation track 30 can be effectively defined. Thus, when the workpiece falls through the orientation track 30, the large end can be precisely controlled to be in a downward position. At the same time, with the help of the concentric unit 6, the central axis of the workpiece is ensured to be inserted into the ejector pin assembly 42, and finally fed into the discharge track 50 through the orientation feed unit 4.

[0055] In this embodiment, the second feeding section 2 is provided with a guide block 26 connected to the support frame 22. The guide block 26 is provided with an arc-shaped groove 27 for accommodating the forward and backward extension and retraction of the pusher cylinder 24. The guide block 26 is vertically connected to a fixed block group 28. A conveying cylinder 29 is connected between the fixed block groups 28. The outer end of the fixed block group 28 away from the guide block 26 is connected and fixed to the conveying and directional section 3.

[0056] The guide block 26 is fixed to the loading rack to ensure that the pusher cylinder 24 connected to the cylinder 60 23 is arranged along the direction of the transmission channel 20. At the same time, an arc-shaped groove 27 is arranged on the guide block 26 to match the radius of the transmission channel 20, which is used to provide a pushing stroke for the pusher cylinder 24. The conveying cylinder 29 between the fixed block groups 28 is connected to the arc-shaped groove 27 to facilitate the pushing of the workpiece into the directional track 30.

[0057] In this embodiment, the conveying and directional section 3 includes a limiting frame 31, the directional track 30 is arranged inside the limiting frame 31, the cylinder 60 is connected to the upper end of the limiting frame 31, and the outer end of the limiting frame 31 abuts against the supporting top frame 62.

[0058] The limiting frame 31 is installed on both sides of the directional track 30 to prevent the workpiece from falling. At the same time, the cylinder 60 is connected and fixed to the limiting frame 31 to fix the installation position of the cylinder 60, which facilitates the lifting action of the concentric unit 6 on the workpiece.

[0059] In this embodiment, the directional rail feeding unit 4 includes a bracket 43 for fixing the driving component 40, an indexing table 44 connected to the driving component 40, and a feeding plate 45 connected to the indexing table 44. The feeding plate 45 is provided with four feeding feet 41 in a circumferential manner with the central axis as the reference. Each feeding foot 41 is provided with a central hole connected to the ejector pin assembly 42.

[0060] The bracket 43 fixes the installation position of the drive component 40. The drive component 40 drives the indexing table 44 to rotate. At the same time, the loading plate 45 will rotate in an indexing manner. Each rotation is 90 degrees. The four loading feet 41 on the loading plate 45 will rotate in coordination. Each rotation will transport the workpiece on the corresponding loading foot 41 to the discharge track 50. Each loading foot 41 of the workpiece to be loaded is placed in the adjustment space 64. The workpiece is inserted into the ejector pin assembly 42 on the corresponding loading foot 41 for transportation. Of course, multiple loading feet 41 can also be designed. The indexing angle of rotation is limited according to the number of loading feet 41. At the same time, it is ensured that the workpiece is in the state of large end facing upward when it is transported to the discharge track 50.

[0061] In this embodiment, the ejector pin assembly 42 includes an ejector pin body 420 that can be matched and inserted with the central axis of the workpiece, and an elastic recovery member 422 sleeved on the bottom of the ejector pin body 420. The ejector pin body 420 is coaxially inserted into the feeding foot 41. The bottom of the ejector pin body 420 is provided with a fixing part 421 for easy sleeve of the elastic recovery member 422. The fixing part 421 is fixed in the central hole.

[0062] The ejector pin body 420 is columnar and vertically connected to the central hole. The ejector pin body 420 and the fixing part 421 at the bottom end are integrally formed. The outer diameter of the fixing part 421 is smaller than that of the ejector pin body 420. The elastic return member 422 is fitted tightly onto the fixing part 421 and placed in the central hole, so that the central axis of each workpiece that moves to the bottom of the orientation track 30 can be inserted into the ejector pin body 420, ensuring the stability and accuracy of workpiece feeding.

[0063] In this embodiment, the discharge unit 5 includes a discharge track 50 arranged in the same direction as the rotation direction of the loading foot 41 and a protective cover plate 51 connected to the discharge track 50. A rotation space that can accommodate the rotation of the loading base plate 45 is arranged between adjacent protective cover plates 51. A transmission screw unit 52 for limiting the direction of the workpiece is arranged in the discharge track 50.

[0064] The discharge track 50 is used to transport the workpiece conveyed by the loading foot 41 to the discharge port with the large end facing up and the small end facing down. At the same time, the protective cover plate 51 connected by the discharge track 50 is used to limit the assembly position of the loading base plate 45 and also serves as a protective function. The workpiece is transmitted to the required assembly position through the transmission screw unit 52.

[0065] The transmission screw unit 52 includes a motor 520 and a twin screw 521 driven by the motor 520. The motor 520 drives the twin screw 521 to rotate through a gear set 522. The twin screws 521 are respectively arranged in the discharge track 50. The workpiece is placed in the discharge track 50 and simultaneously abuts against the twin screws 521. When the motor 520 starts, the twin screws 521 rotate to convey the material.

[0066] The low-noise feeding device in this application can significantly reduce noise during the workpiece feeding process. Noise tests conducted in a 20 to 30 square meter space show that the noise level can be reduced from 120 decibels to around 90 decibels or below. At the same time, the success rate of material selection can reach 100%, and it also avoids mutual wear between workpieces. Moreover, after passing through feeding section 1, feeding section 2, conveying and orientation section 3, orientation rail feeding unit 4, and discharging unit 5, it can finally achieve automatic self-orientation of the workpiece with the large end facing up and the small end facing down. At the same time, the orientation success rate is high, which can effectively adapt to the high processing speed of machine tools and improve the workpiece feeding efficiency.

[0067] In the description of this specification, references are made to the terms "one embodiment", "some embodiments", "example", "specific example".

[0068] The descriptions using terms such as "example" or "some examples" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, welding, and bonding that are mature in the prior art, and will not be described in detail here.

[0070] The above description is only a preferred embodiment of the present invention. For those skilled in the art, various modifications and variations can be made in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A self-directional, low-noise feeding device, characterized in that: include The first feeding section has a feeding channel at its tail end for feeding workpieces. The second feeding section has a transmission channel connected to the feeding channel. The second feeding section pushes the workpiece along the transmission channel and selects the direction of the workpiece through a driving push unit. The front end or near the front end of the driving push unit has a taper a, and the arc radius of the transmission channel is b. A conveying directional section has a directional track communicating with a transmission channel, the conveying directional section and the transmission channel having an included angle c, and the inner walls of the directional track forming an included angle d; The directional rail feeding unit is driven to rotate by a driving component. The directional rail feeding unit has a plurality of feeding feet distributed on it for receiving workpieces in the directional rail. At least one feeding foot is provided with a pin assembly for positioning the central axis of the workpiece. The discharge unit has a discharge track for receiving workpieces transferred by the directional feeding unit; The directional rail feeding unit includes a bracket for fixing the driving component, an indexing table connected to the driving component, and a feeding plate connected to the indexing table. The feeding plate is provided with four feeding feet circumferentially around the central axis, and each feeding foot is provided with a central hole for connecting to the ejector pin assembly. The drive and push unit includes a support frame, on which a second cylinder is connected. The front end of the second cylinder is connected to a pusher cylinder, and the front end of the pusher cylinder forms a conical structure with a taper a. The second feeding section is provided with a guide block connected to the support frame. The guide block is provided with an arc-shaped groove for accommodating the forward and backward extension and retraction of the pusher cylinder. The guide block is vertically connected to a fixed block group, and a conveying cylinder is connected between the fixed block groups. The outer end of the fixed block group away from the guide block is connected and fixed to the conveying and directional section.

2. The self-directional low-noise feeding device according to claim 1, characterized in that: It also includes an auxiliary concentric unit, which includes a cylinder, a support top frame connected to the cylinder via a connecting shaft, an auxiliary track connected to the directional track between the support top frames, a directional frame connected to the front end of the support top frame, and an adjustment space arranged inside the directional frame to facilitate the passage of the loading foot.

3. The self-directional low-noise feeding device according to claim 1, characterized in that: The taper a has an angle range of 130° to 140°, the arc radius b has a value range of 30 mm to 40 mm, the included angle c has an angle range of 20° to 40°, and the included angle d has an angle range of 115° to 125°.

4. A self-directional low-noise feeding device according to claim 1 or 3, characterized in that: The taper a has an angle of 136°, the arc radius b has a value of 35.1 mm, the included angle c has a value of 30°, and the included angle d has a value of 120°.

5. The self-directional low-noise feeding device according to claim 2, characterized in that: The conveying and directional section includes a limiting frame, the directional track is arranged inside the limiting frame, a cylinder is connected to the upper end of the limiting frame, and the outer end of the limiting frame abuts against the supporting top frame.

6. The self-directional low-noise feeding device according to claim 1, characterized in that: The ejector pin assembly includes an ejector pin body that can be matched and inserted with the central axis of the workpiece, and an elastic return member sleeved on the bottom of the ejector pin body. The ejector pin body is coaxially inserted into the feeding foot, and the bottom of the ejector pin body is provided with a fixing part that facilitates the sleeve of the elastic return member. The fixing part is fixed in the central hole.

7. The self-directional low-noise feeding device according to claim 1, characterized in that: The discharge unit includes a discharge track arranged in the same direction as the rotation direction of the loading foot and a protective cover plate connected to the discharge track. A rotation space that can accommodate the rotation of the loading base plate is arranged between adjacent protective covers. A transmission screw unit for limiting the direction of the workpiece is arranged in the discharge track.

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