Self-adaptive screw discharging head and screw robot

Abstract

The invention discloses a self-adaptive screw discharging head and a screw robot, and belongs to the technical field of screw feeding, and the self-adaptive screw discharging head comprises a column body, a discharging nozzle, a central channel, a side channel, a nozzle outlet channel and the like. Wherein the central channel is arranged in the column body and is a path through which a screw and a screwdriver head pass together; the side channels are obliquely arranged on one side of the center channel and communicated with the center channel, and the multiple side channels are distributed at a certain included angle, so that screws can enter the center channel more easily. The adjustability of the opening size is realized, and the adaptability and the flexibility of the discharge nozzle are improved. Meanwhile, the supporting strips on the sliding sleeve correspond to the vertical strips one to one and abut against the vertical strips, and additional supporting and adjusting functions are provided. And the screw is automatically screwed. Automatic adaptation and efficient conveying of screws of different sizes are achieved, and the flexibility and stability of the discharging nozzle are enhanced; the screw self-adaptive discharging head is integrated into the screw robot, automatic screwing operation of screws is achieved, the working efficiency is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of screw feeding, and particularly to a screw self - adapting discharging head and a screw robot. Background Art

[0002] In the process of R & D and manufacturing of vehicle parts, screw pre - tightening work is often used. Currently, automated or semi - automated production methods are widely adopted. This transformation effectively reduces the dependence on manual assembly, significantly improves production efficiency and saves valuable time. However, there are also some challenges in the automated assembly process. Specifically, different installation positions require screws of different models, sizes and diameters for fixation. Traditional screw chuck designs usually can only adapt to a single model of screw, which means that when installing parts, multiple screw chucks corresponding to the screw models need to be prepared. This approach not only occupies a large amount of production space but also increases production costs because each screw model requires a corresponding chuck tool. Therefore, the present invention provides a screw self - adapting discharging head and a screw robot. Summary of the Invention

[0003] Aiming at the above - mentioned existing technical deficiencies, the purpose of the present invention is to provide a screw self - adapting discharging head and a screw robot, which can perform the discharging work for screws of different models.

[0004] To solve the above - mentioned technical problems, the present invention adopts the following technical solutions: The present invention provides a screw self - adapting discharging head, including a column body and a discharging nozzle. The discharging nozzle is fixed at the end of the column body, and further includes: A central channel, which is arranged inside the column body and is arranged along the length direction of the column body; Side channels, which are inclined and arranged on one side of the central channel and communicate with the central channel. The number of side channels is multiple; A nozzle channel, which is arranged inside the discharging nozzle and communicates with the end of the central channel. The shape of the nozzle channel is conical, and the end of the nozzle channel has an opening with an adjustable size; Wherein, when the screw enters the inside of the nozzle channel, the opening diameter of the nozzle channel is larger than the diameter of the screw shank and smaller than the diameter of the screw head.

[0005] Preferably, the discharging nozzle includes a plurality of circumferentially arranged vertical bars, and a gap is provided between every two adjacent vertical bars.

[0006] Preferably, a fixing sleeve is fixed at the end of the column body, a sliding sleeve is slidably installed on the fixing sleeve, a plurality of support bars are arranged inside the sliding sleeve, the support bars correspond to the vertical bars one by one, and the support bars press against the corresponding vertical bars.

[0007] Preferably, the support bar is a bent bar with a bent part in the middle, and the bent part in the middle presses against the vertical bar. The upper end of the support bar is fixed to the inner wall of the sliding sleeve, and the lower end of the support bar presses against the inner wall of the sliding sleeve.

[0008] Preferably, a linear push rod is fixed on the column body, and the output end of the linear push rod is connected to the sliding sleeve.

[0009] Preferably, a plurality of relief grooves are provided on both the inner and outer sides of the root of the vertical bar, and the relief grooves on the inner and outer sides are arranged staggeredly.

[0010] Preferably, the end of the vertical bar is an arc surface, and a guiding bar is attached to the inner side of the vertical bar.

[0011] Preferably, the central channel has an upper flared opening and a lower constricted opening, and the diameter of the lower opening of the central channel is smaller than the diameter of the upper end of the discharge nozzle.

[0012] Preferably, an inclined tube is fixed on the side wall of the column body. The inclined tubes correspond to the side channels one by one, and the side channels are opened inside the inclined tubes. When the number of the side channels is multiple, the connection positions of the multiple side channels and the central channel are distributed in a staggered manner.

[0013] A screw robot, the screw robot includes the above-mentioned screw self-adaptive discharge head, and the screw robot further includes a bit capable of generating a tightening force, and the bit is installed on the column body.

[0014] The beneficial effects of the present invention are as follows: The discharge nozzle of the present invention realizes the adjustability of the opening size through the circumferentially arranged vertical bars and the gap design. This design enables the discharge nozzle to adapt to screws of different sizes and provides a certain elastic expansion when the screws pass through, thereby ensuring that the screws can be discharged smoothly. The screw self-adaptive discharge head realizes the automatic adaptation and efficient conveying of screws of different sizes by designing central channels with different diameters and side channels connected thereto and distributed in a staggered manner. This design ensures that the screws can smoothly and accurately enter the central channel and complete the tightening operation through the discharge nozzle, greatly improving the efficiency of screw conveying.

[0015] Through the design of the sliding sleeve and the support bar, the user can conveniently adjust the gap size between the vertical bars, thereby further adjusting the opening size of the discharge nozzle. The relief groove design at the root of the vertical bar and the arc surface design of the guiding bar optimize the strength and stiffness of the structure, reduce stress concentration, and enable the vertical bar to deform more easily without being easily broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic internal structure diagram of the present invention.

[0017] Figure 2It is a schematic structural diagram of the discharge nozzle.

[0018] Figure 3 It is Figure 1 the enlarged view of part A in

[0019] Figure 4 It is Figure 1 the enlarged view of part B in

[0020] Figure 5 It is the three-dimensional view of the present invention.

[0021] In the figure: 1. Cylinder, 2. Central channel, 3. Side channel, 4. Fixed sleeve, 5. Sliding sleeve, 6. Support bar, 7. Discharge nozzle, 8. Linear push rod, 9. Vertical bar, 10. Bit head, 11. Guide bar, 12. Inclined tube. Specific embodiments

[0022] The following uses specific embodiments to illustrate the present invention, but it is not a limitation of the invention.

[0023] Embodiment 1 As Figures 1-5 shown, in this embodiment, the provided screw self-adaptive discharge head includes a cylinder 1 and a discharge nozzle 7. The discharge nozzle 7 is fixed at the end of the cylinder 1. The outlet position of the discharge nozzle 7 is connected to the screw hole on the product. The screw is discharged through this outlet and a tightening force is applied during this process. It also includes a central channel 2, a side channel 3 and a nozzle channel.

[0024] The central channel 2 is arranged inside the cylinder 1. The central channel 2 is arranged along the length direction of the cylinder 1. The central channel 2 is the path through which the screw and the bit head 10 pass together. The screw thread enters the discharge nozzle 7 through this central channel 2, and then the bit head 10 also passes through this channel to contact the screw. The end of the bit head 10 contacts the screw and drives the screw to rotate together.

[0025] The side channel 3 is inclined and arranged on one side of the central channel 2 and communicates with the central channel 2. The number of side channels 3 is multiple. The side channels 3 are distributed at a certain angle with the central channel 2, and the ends of these angles are all inclined towards the direction of the discharge nozzle 7. This inclined design makes it easier for the screw to enter the inside of the central channel 2. In addition, the end of the side channel 3 far from the central channel 2 is connected to the screw supply device outside this discharge head through a hose. It should be noted that the screw supply device, as a conventional component of the screw robot, has been publicly disclosed in the prior art and is not an innovation of the present invention. Therefore, the present invention does not specifically elaborate on it here.

[0026] The nozzle channel is arranged inside the discharge nozzle 7. The nozzle channel communicates with the end of the central channel 2. The shape of the nozzle channel is conical, and the end of the nozzle channel has an opening with adjustable size.

[0027] Among them, when the screw enters the inner part of the nozzle passage, the opening diameter of the nozzle passage is larger than the diameter of the screw rod of the screw and smaller than the diameter of the screw head. When the screw moves along the central passage 2 to the inner part of the nozzle passage, the screw rod at its front end can quickly pass through the front opening of the nozzle passage. The diameter of the screw head is slightly larger than the opening size at the end of the nozzle passage. However, due to the adjustability of the opening at the end of the nozzle passage, when the screw is subjected to the thrust of the bit 10, an outward expansion force will be generated on the opening of the nozzle passage. With the expansion of the nozzle passage, the screw can pass through smoothly, and finally complete the operation of moving out of the nozzle passage and screwing into the screw hole.

[0028] A linear push rod 8 is fixed on the column 1. The linear push rod 8 is a mechanical device that can perform reciprocating motion in a straight line direction and is usually used to push, pull or adjust the position of other components. The linear push rod 8 is a commonly used component in the prior art and is not an innovation point of the present invention, so the present invention will not be specifically explained. The output end of the linear push rod 8 is connected to the sliding sleeve 5. By pushing or pulling the linear push rod 8, the sliding sleeve 5 can move on the fixed sleeve 4.

[0029] A plurality of relief grooves are provided on both the inner and outer sides of the root of the vertical strip 9, and the relief grooves on the inner and outer sides are arranged staggeredly. If there is a relief groove on the outer side, then at the same horizontal position, there may not be a corresponding relief groove on the inner side, but there is one at a slightly higher or slightly lower position. This staggered arrangement design is to optimize the strength, stiffness or torsional resistance of the vertical strip 9, and may also help to reduce stress concentration, enabling the vertical strip 9 to deform more easily and not break easily.

[0030] The end of the vertical strip 9 is an arc surface, which is used to reduce friction, provide a smooth transition or ensure better cooperation with other components. The arc surface design can also increase the durability of the guide strip 11 and reduce damage caused by stress concentration. The guide strip 11 is attached to the inner side of the vertical strip 9. The combination of the guide strip 11 and the vertical strip 9 is usually used to provide precise guiding or positioning functions to ensure that other components can move or be positioned along a predetermined path.

[0031] The central passage 2 has an upper flared and lower converging opening. The upper part of the central passage 2 has a larger diameter, and the lower part of the passage has a smaller diameter, enabling the screw rod part of the screw to pass through smoothly. The opening diameter at the lower end of the central passage 2 is smaller than the upper end diameter of the discharge nozzle 7 to ensure that the screw can smoothly slide from the central passage 2 into the discharge nozzle 7.

[0032] On the side wall of the cylinder 1, an inclined tube 12 is fixed. The inclined tubes 12 correspond to the side channels 3 one by one. The side channels 3 are opened inside the inclined tubes 12. When the number of side channels 3 is multiple, the connection positions of the multiple side channels 3 with the central channel 2 are distributed in a staggered manner. The connection positions of the central channel 2 with the multiple side channels 3 are cleverly distributed at different points on the axis of the central channel 2. Specifically, near the position of the lower vertical strip 9, the diameter of the central channel 2 is designed to be relatively small to accommodate and convey screws of smaller sizes. Correspondingly, the side channels 3 in this area are also responsible for conveying small-sized screws. While for the part of the central channel 2 far from the lower vertical strip 9, its diameter is relatively increased so as to be able to accommodate and smoothly convey screws of larger sizes. This design enables larger-sized screws to more easily enter the central channel 2 with a corresponding larger diameter. Generally speaking, this design of adjusting the diameter of the central channel 2 and its connection positions with the side channels 3 according to the screw sizes greatly optimizes the efficiency and smoothness of screw conveyance.

[0033] Embodiment 2 As Figures 1-5 shown, on the basis of Embodiment 1, this embodiment provides the structure of the discharge nozzle 7, which is specifically as follows: The discharge nozzle 7 includes a plurality of circumferentially arranged vertical strips 9. There is a gap between every two adjacent vertical strips 9. By adjusting the size of the gap between the vertical strips 9, the opening size of the discharge nozzle 7 can be changed, enabling the discharge nozzle 7 to accommodate screws of different sizes to pass through. When the screw head attempts to pass through the discharge nozzle 7, the gap between the vertical strips 9 allows the discharge nozzle 7 to expand elastically to a certain extent, thus allowing the screw to pass through. Once the screw passes through, the discharge nozzle 7 may return to its original shape and size. Compared with a completely solid discharge nozzle 7, this design with gaps can reduce the weight while still maintaining sufficient strength.

[0034] A fixing sleeve 4 is fixed at the end of the cylinder 1. A sliding sleeve 5 is slidably installed on the fixing sleeve 4. A plurality of support strips 6 are provided inside the sliding sleeve 5. The support strips 6 correspond to the vertical strips 9 one by one. The support strips 6 press against the corresponding vertical strips 9. The fixing sleeve 4 is an annular sleeve with an internal space, and its internal dimensions match the diameter of the cylinder 1 so as to be tightly installed on the cylinder 1. The support strips 6 are strip-shaped structures protruding inward from the inner wall of the sliding sleeve 5. They are distributed along the circumference of the sliding sleeve 5 (i.e., around the circumference of the sliding sleeve 5). When the sliding sleeve 5 slides on the fixing sleeve 4, the support strips 6 will contact and press against their corresponding vertical strips 9. This pressing may be for providing additional support, fixation or adjusting the gap between the vertical strips 9. This design allows the relative position or the size of the gap between the vertical strips 9 to be adjusted by sliding the sliding sleeve 5, and the support strips 6 do not affect the outward expansion of the vertical strips 9.

[0035] The support bar 6 is a bent bar with a bent part in the middle. The bent part is a bent shape that bulges inward or outward, such as an arc, an angle, or other shapes. It endows the support bar 6 with certain elasticity and adaptability. And the bent part in the middle presses against the vertical bar 9, providing a certain supporting force or adjustment force, which helps to stabilize the position of the vertical bar 9 or adjust the gap between the vertical bars 9. The upper end of the support bar 6 is fixed on the inner wall of the sliding sleeve 5, and the lower end of the support bar 6 presses against the inner wall of the sliding sleeve 5, allowing the support bar 6 to have a certain elastic deformation when subjected to an external force (such as the pressing force of the vertical bar 9), so as to adapt to different positions and gap sizes of the vertical bars 9.

[0036] Embodiment Three As Figure 5 shown, on the basis of Embodiment One and Embodiment Two, this embodiment provides a screw robot, which is specifically as follows: A screw robot, the screw robot includes the above-mentioned screw self-adaptive discharging head. The screw robot further includes a bit 10 capable of generating a tightening force. The bit 10 is installed on the column 1. A driving device for pushing the bit 10 to move and driving the bit 10 to rotate is fixed on the column 1. The rotation and movement of the bit 10 are common components in existing screw robots and are not the innovative points of the present invention, so the present invention will not be specifically explained.

[0037] Working principle: When the screw supply device transports screws to the side channel 3 in the inclined tube 12, since the side channel 3 and the central channel 2 are inclined and distributed at a certain angle, the screws can enter the central channel 2 more easily. According to the size of the screws, the central channels 2 with different diameters and the staggered side channels 3 can automatically adapt to and transport the screws.

[0038] When the screw moves along the central channel 2 to the inside of the discharging nozzle 7, the conical design and adjustable opening of the discharging nozzle channel can ensure that the diameter of the screw head is slightly larger than the opening size at the end of the discharging nozzle channel. When the screw is subjected to the thrust of the bit 10, it will generate an outward expansion force on the opening of the discharging nozzle channel, enabling the screw to pass through smoothly and finally complete the operation of moving out of the discharging nozzle channel and screwing into the screw hole.

[0039] By sliding the sliding sleeve 5 on the fixed sleeve 4, the user can adjust the gap size between the vertical bars 9 as needed, thereby changing the opening size of the discharging nozzle 7. This adjustment function enables the discharging nozzle 7 to adapt to screws of different sizes and ensures that the screws can be discharged smoothly.

[0040] In the screw robot, the driving device pushes and drives the bit 10 to move and rotate, so that the end of the bit 10 contacts the screw and drives the screw to rotate together. As the bit 10 rotates and moves continuously, the screw is gradually tightened into the screw hole on the product, completing the entire screw transportation and tightening operation.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or equivalently replaced, and any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims

1. Screw self - adapting discharge head, including a cylinder (1) and a discharge nozzle (7), the discharge nozzle (7) is fixed at the end of the cylinder (1), characterized in that, It further includes: A central channel (2) is arranged inside the cylinder (1), and the central channel (2) is arranged along the length direction of the cylinder (1); Side channels (3) are inclinedly arranged on one side of the central channel (2) and communicate with the central channel (2), and the number of the side channels (3) is multiple; A nozzle channel is arranged inside the discharge nozzle (7), the nozzle channel communicates with the end of the central channel (2), the shape of the nozzle channel is conical, and the end of the nozzle channel has an opening with adjustable size; Wherein, when the screw enters the inside of the nozzle channel, the opening diameter of the nozzle channel is larger than the diameter of the screw rod and smaller than the diameter of the screw head.

2. The self-adaptive screw discharging head according to claim 1, wherein The discharge nozzle (7) includes a plurality of circumferentially arranged vertical bars (9), and a gap is provided between every two adjacent vertical bars (9).

3. The self-adaptive screw discharging head according to claim 2, wherein, A fixed sleeve (4) is fixed at the end of the cylinder (1), a sliding sleeve (5) is slidably mounted on the fixed sleeve (4), a plurality of support bars (6) are arranged inside the sliding sleeve (5), the support bars (6) correspond to the vertical bars (9) one by one, and the support bars (6) press against the corresponding vertical bars (9).

4. The self - adapting screw discharging head according to claim 3, wherein, The support bar (6) is a bent bar with a bent part in the middle, and the bent part in the middle presses against the vertical bar (9). The upper end of the support bar (6) is fixed on the inner wall of the sliding sleeve (5), and the lower end of the support bar (6) presses against the inner wall of the sliding sleeve (5).

5. The self-adaptive screw discharging head according to claim 3, wherein A linear push rod (8) is fixed on the cylinder (1), and the output end of the linear push rod (8) is connected to the sliding sleeve (5).

6. The self - adapting screw discharging head according to claim 3, wherein, A plurality of relief grooves are provided on both the inner and outer sides of the root of the vertical bar (9), and the relief grooves on the inner and outer sides are arranged staggeredly.

7. The screw self-adaptive discharging head and the screw robot according to claim 6, characterized in that, The end of the vertical bar (9) is an arc surface, and a guide bar (11) is attached to the inner side of the vertical bar (9).

8. The self - adapting screw discharging head according to claim 1, wherein, The central channel (2) has an upper flared opening and a lower closed opening, and the opening diameter of the lower end of the central channel (2) is smaller than the upper end diameter of the discharge nozzle (7).

9. The self-adaptive screw discharging head according to claim 8, wherein, An inclined pipe (12) is fixed on the side wall of the cylinder (1), the inclined pipe (12) corresponds to the side channel (3) one by one, the side channel (3) is arranged inside the inclined pipe (12), and when the number of the side channels (3) is multiple, the connection positions of the multiple side channels (3) and the central channel (2) are distributed in a staggered manner.

10. A screw robot, characterized in that, The screw robot includes the screw self-adaptive discharge head according to any one of claims 1-9. The screw robot further includes a bit (10) capable of generating a tightening force, and the bit (10) is mounted on the cylinder (1).

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