Anti-theft nut automatic assembly machine

Abstract

The present invention relates to an automatic nut assembly machine for anti-theft, comprising a frame and a nut feeding device, a steel ball feeding device, a plastic liner feeding device, a discharging device and an assembly transmission track arranged on the frame, wherein the assembly transmission track has a nut feeding position where the nut feeding device sequentially places the nut on the assembly transmission track, an assembly position where the steel ball feeding device assembles the steel ball into the nut and then the plastic liner feeding device assembles the steel ball into the nut, and a discharging device where the discharging device moves the assembled finished product out of the assembly transmission track. By adopting the above scheme, the present invention provides an automatic nut assembly machine for anti-theft that improves assembly efficiency and qualified product rate.

Description

Technical Field

[0001] The invention relates to an anti-theft nut, in particular to an automatic assembling machine for anti-theft nuts. Background Art

[0002] like Figure 1 and Figure 2 As shown, the anti-theft nut includes a nut a, a steel ball b and a plastic liner c. Two placement grooves d for placing the steel ball b are arranged on the inner side of the nut a. The cross-section of the two placement grooves d is arc-shaped and the radial depth gradually increases in the reverse direction of the thread. After the steel ball is loaded into the placement groove d, the plastic liner c is inserted into the inner side of the nut a to limit the steel ball in the placement groove d. When the nut is tightened clockwise, the ball rolls along the blind groove, and the plastic liner is automatically ejected and falls off. When the nut is loosened counterclockwise, the ball is stuck in the thread because the radial size of the blind groove gradually decreases, and the nut cannot be loosened, thereby playing an anti-theft role.

[0003] Traditionally, the assembly of anti-theft nuts is mostly manual. During the process of inserting the plastic liner into the nut after the steel ball is loaded into the placement groove, the steel ball has a certain rolling property and may slip out of the placement groove due to excessive movement of the worker, resulting in assembly failure. Only workers who have worked for a certain period of time can achieve a higher assembly speed. Moreover, if the anti-theft nut is not discovered in time when the steel ball slips out of the placement groove, it will not have the anti-theft function after the transfer is completed, and it will be a defective product, which will cause greater economic losses. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide an automatic assembling machine for anti-theft nuts which can improve assembly efficiency and qualified product rate.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: it includes a frame and a nut feeding device, a steel ball feeding device, a plastic liner feeding device, a discharging device and an assembly transmission track arranged on the frame, wherein the assembly transmission track has a nut feeding position where the nut feeding device places the nuts in sequence on the assembly transmission track, an assembly position where the steel ball feeding device assembles the steel balls into the nuts and then the plastic liner feeding device assembles them into the nuts, and a discharging position where the discharging device moves the assembled finished products out of the assembly transmission track.

[0006] By adopting the above technical scheme, manual assembly is completely replaced by automatic assembly, which improves the assembly efficiency and makes the operation more stable. It also avoids the problem of reduced qualified rate caused by steel balls being shaken out due to excessive manual assembly. During assembly, the nuts are first placed on the assembly transmission track in sequence, and the nuts transmitted to the assembly position have steel balls and plastic liners loaded into the nuts in sequence. The assembled nuts are then transmitted to the discharging position for discharging, completing the entire assembly steps of the automated assembly.

[0007] The present invention is further configured as follows: the steel ball feeding device comprises a steel ball source, a steel ball assembly seat, an assembly seat lifting mechanism and an assembly seat rotating mechanism; the steel ball assembly seat is located above the assembly position, rises and falls under the drive of the assembly seat lifting mechanism, and rotates under the drive of the assembly seat rotating mechanism; the steel ball assembly seat is adapted to the shape of the inner side of the nut; the steel ball assembly seat is provided with a feeding channel corresponding to each placement groove on the inner side of the nut; the feeding channel has a steel ball inlet located at the upper end of the steel ball assembly seat and a steel ball outlet located at the lower side of the steel ball assembly seat; the steel ball inlet is connected to the steel ball source; the assembly seat lifting mechanism drives the steel ball assembly seat to descend, the steel ball assembly seat extends into the nut located at the assembly position until the steel ball outlet is flush with the height of the placement groove, the steel balls of the steel ball source enter the feeding channel from the steel ball inlet and reach the steel ball outlet; the assembly seat rotating mechanism drives the steel ball assembly seat to rotate and the steel balls fall into the placement groove when passing through the placement groove; the assembly seat lifting mechanism drives the steel ball assembly seat to rise and return to the initial position.

[0008] By adopting the above technical scheme, the steel ball reaches the steel ball outlet through the feed channel, and the feed channel corresponds to each placement groove one by one to ensure that each placement groove can accurately hold one steel ball. When the assembly seat rotating mechanism drives the steel ball assembly seat to rotate, the steel ball outlet moves relatively along the circumferential direction of the inner side of the nut, and when passing through the placement groove, the steel ball automatically falls into the placement groove under the action of gravity. By automatically adapting to the position of the placement groove during rotation, the need to calibrate the circumferential position of the nut before assembly, which reduces the assembly efficiency and causes the bloated structure due to the addition of multiple sensors and drive components, making the assembly structure more efficient and streamlined.

[0009] The present invention is further configured as follows: the plastic lining feeding device comprises a lining source, a lining conveying track and a lining lifting mechanism; the head end of the lining conveying track relative to the transmission direction is connected to the lining source as a lining feeding end, and the plastic lining is arranged in sequence on the lining conveying track; the end of the lining conveying track relative to the transmission direction is located below the assembly position as a lining discharge end; the lining lifting mechanism lifts the plastic lining located at the lining discharge end; after the plastic lining enters the inner side of the nut, the assembly seat lifting mechanism drives the steel ball assembly seat to rise; after the assembly is in place, the lining lifting mechanism returns to the lining discharge end.

[0010] By adopting the above technical solution, the position below the assembly position is reasonably utilized for feeding the plastic liner, making the equipment structure and assembly steps more compact and ensuring assembly efficiency. At the same time, the steel ball assembly seat is withdrawn from the nut only after the plastic liner enters the inside of the nut, completely avoiding the possibility of the steel ball falling out and ensuring a high pass rate.

[0011] The present invention is further configured as follows: the lining lifting mechanism includes a lifting material driving assembly and a lifting rod that rises and falls under the drive of the lifting material driving assembly, and the top of the lifting rod passes through the bottom of the lining conveying track and constitutes a part of the lining conveying track.

[0012] By adopting the above technical solution, the top of the push rod serves as a part of the liner conveying track, ensuring that the plastic liner can be stably transmitted to the liner discharge end, and then the push rod completely pushes the plastic liner into the inside of the nut to realize the automatic assembly of the plastic liner.

[0013] The present invention is further configured as follows: the assembly seat lifting mechanism includes a lifting slide, a lifting slide and a lifting drive assembly, the lifting slide is vertically fixed on the frame, the lifting drive assembly drives the lifting slide to reciprocate on the lifting slide, and the assembly seat rotating mechanism is installed on the lifting slide.

[0014] By adopting the above technical solution, the lifting drive assembly drives the assembly seat rotation mechanism and the steel ball assembly seat to lift and lower at the same time, making the structure more reasonable and compact.

[0015] The present invention is further configured as follows: a push drive assembly is provided at the head end of the assembly transmission track relative to the transmission direction, and the push drive assembly drives an assembly push rod which moves along the assembly transmission track and pushes the nut forward by a nut length and then returns to its original position.

[0016] By adopting the above technical solution, the assembly push rod, on the one hand, generates a driving force to transmit the nut along the assembly transmission track, and on the other hand, ensures that the nut moves forward accurately and replaces the assembled nut to continue moving forward.

[0017] The present invention is further configured as follows: the nut feeding device includes a nut source, a nut conveying track and a nut side-pushing mechanism; the nut conveying track is arranged side by side with the assembly transmission track; the side of the end of the nut conveying track relative to the transmission direction is connected to the side of the nut feeding position; the nut side-pushing mechanism includes a nut side-pushing driving assembly located on the other side of the assembly transmission track relative to the nut conveying track; the nut side-pushing driving assembly drives a nut side push rod which pushes the nut located at the end of the nut conveying track relative to the transmission direction to the nut feeding position.

[0018] By adopting the above technical solution, the nut side-pushing mechanism places the nuts one by one on the assembly transmission track, making the process of assembling nuts on the assembly transmission track more orderly and the positions more accurate, thereby ensuring a reliable and smooth assembly process.

[0019] The present invention is further configured as follows: the discharging device includes a discharging drive assembly, the discharging drive assembly is located on the side of the discharging position and drives a discharging side push rod that pushes the assembled finished product out of the assembly transmission track from the side.

[0020] By adopting the above technical solution, the push rod on the discharge side pushes the finished product out of the assembly transmission track to realize automatic discharge of the finished product, and the finished product is output in time to avoid hindering the subsequent assembly of the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-dimensional diagram and exploded diagram of the anti-theft nut;

[0022] Figure 2 It is a schematic diagram of a top view of a specific embodiment of the invention;

[0023] Figure 3 It is a structural schematic diagram of a steel ball feeding device, a plastic liner feeding device and an assembly transmission track in a specific embodiment of the invention;

[0024] Figure 4 for Figure 3 A magnified view of middle;

[0025] Figure 5 It is a structural schematic diagram of the steel ball dropping mechanism in a specific implementation manner of the invention. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] like Figure 2 — Figure 5As shown, the present invention discloses an anti-theft nut automatic assembly machine, comprising a frame 1 and a nut feeding device 2, a steel ball feeding device 3, a plastic liner feeding device 4, a discharging device 5 and an assembly transmission track 6 arranged on the frame 1. The assembly transmission track 6 has a nut feeding position 61 where the nut feeding device 2 sequentially places nuts on the assembly transmission track 6, an assembly position 62 where the steel ball feeding device 3 assembles steel balls into the nuts and then the plastic liner feeding device 4 assembles them into the nuts, and an assembly position 63 where the discharging device 5 sequentially places nuts on the assembly transmission track 6 along the transmission direction. The finished product is moved out of the discharging position 63 of the assembly transmission track 6, and the manual assembly is completely replaced by automatic assembly, which improves the assembly efficiency and is more stable during the operation, thereby avoiding the problem of reduced qualified rate caused by the steel balls being shaken out due to the large amplitude of manual assembly. During assembly, the nuts are first placed on the assembly transmission track 6 in sequence, and the nuts transferred to the assembly position 62 have the steel balls and plastic liners loaded into the nuts in sequence, and then the assembled nuts are transferred to the discharging position 63 for discharging, completing the assembly steps of the entire automated assembly.

[0029] The steel ball feeding device 3 includes a steel ball source 31, a steel ball assembly seat 32, an assembly seat lifting mechanism and an assembly seat rotating mechanism 33. The steel ball source 31 can be a steel ball vibrating plate. The steel ball assembly seat 32 is located above the assembly position 62, and is lifted and lowered by the assembly seat lifting mechanism, and rotated by the assembly seat rotating mechanism 33. The steel ball assembly seat 32 is adapted to the shape of the inner side of the nut. The steel ball assembly seat 32 is provided with a feeding channel 321 corresponding to each placement groove on the inner side of the nut. The feeding channel 321 has a steel ball inlet 322 located at the upper end of the steel ball assembly seat 32 and a steel ball outlet 323 located at the lower side of the steel ball assembly seat 32. The steel ball inlet 322 is connected to the steel ball source 31, the assembly seat lifting mechanism drives the steel ball assembly seat 32 to descend, and the steel ball assembly seat 32 extends into the nut located at the assembly position 62 until the steel ball outlet 323 is flush with the height of the placement groove. The steel balls of the steel ball source 31 enter the feed channel 321 from the steel ball inlet 322 and reach the steel ball outlet 323. The assembly seat rotating mechanism 33 drives the steel ball assembly seat 32 to rotate and the steel balls fall into the placement groove when passing through the placement groove. The assembly seat lifting mechanism drives the steel ball assembly seat 32 to rise and return to the initial position. The steel balls reach the steel ball outlet 323 through the feed channel 321. The feed channel 321 corresponds to each placement groove one by one, ensuring that each placement groove can accurately hold one steel ball. When the assembly seat rotating mechanism 33 drives the steel ball assembly seat 32 to rotate, the steel ball outlet 323 moves relatively along the circumferential direction of the inner side of the nut, and when passing through the placement groove, the steel ball automatically falls into the placement groove under the action of gravity. By automatically adapting to the position of the placement groove during rotation, the need to calibrate the circumferential position of the nut before assembly, which reduces the assembly efficiency and the bloated structure caused by the addition of multiple sensors and driving parts, makes the assembly structure more efficient and streamlined. The steel ball source 31 is located at the steel ball inlet 322 and is provided with a steel ball source 31 that falls into the steel ball one by one. The steel ball dropping mechanism includes a receiving seat 361, a lateral sliding rail 36 and a lateral moving cylinder 362. The lateral sliding rail 36 is located on the steel ball inlet 322 and is provided with a dropping port 363 corresponding to each steel ball inlet 322. The lateral moving cylinder 352 drives the receiving seat 361 to reciprocate on the lateral sliding rail 36. The receiving seat 361 is provided with a dropping cavity 364 which can only accommodate a single steel ball. The dropping cavity 364 has a receiving position connected to the steel ball pipeline 311 of the steel ball vibration disk at the top and a dropping position connected to the dropping port 363 at the bottom when it is moved sideways. The lateral movement of the dropping cavity 364 realizes the dropping of steel balls one by one.

[0030] The plastic liner feeding device 4 includes a liner source 41, a liner conveying track 42 and a liner lifting mechanism. The head end of the liner conveying track 42 relative to the conveying direction is connected to the liner source 41 as a liner feeding end 421, and the plastic liner is arranged in sequence on the liner conveying track 42. The end of the liner conveying track 42 relative to the conveying direction is located below the assembly position 62 as a liner discharge end 422. The liner lifting mechanism lifts the plastic liner located at the liner discharge end 422. After the plastic liner enters the inner side of the nut, the assembly seat lifting mechanism drives The steel ball assembly seat 32 rises, and the lining lifting mechanism returns to the lining discharge end 422 after being assembled in place. The position below the assembly position 62 is rationally utilized for feeding the plastic liner, making the equipment structure and assembly steps more compact and ensuring assembly efficiency. At the same time, the steel ball assembly seat 32 withdraws from the nut only after the plastic liner enters the inside of the nut, completely avoiding the possibility of the steel ball falling out and ensuring a high pass rate. In order to ensure the stable transmission of the plastic liner on the liner conveying track 42, a direct vibration device that generates a driving force can be installed below the liner conveying track 42.

[0031] The liner lifting mechanism includes a lifting drive assembly 43 and a lifting rod 431 that rises and falls under the drive of the lifting drive assembly 43. The top of the lifting rod 431 passes through the bottom of the liner conveying track 42 and constitutes a part of the liner conveying track 42. The top of the lifting rod 431 serves as a part of the liner conveying track 42 to ensure that the plastic liner can be stably transmitted to the liner discharge end 422. The plastic liner is then completely pushed into the inside of the nut by the lifting rod 431 to realize automatic assembly of the plastic liner. The lifting drive assembly 43 is a driving component with a linear drive function, preferably a cylinder.

[0032] The assembly seat lifting mechanism includes a lifting slide 34, a lifting slide 341 and a lifting drive assembly 35. The lifting slide 34 is fixedly arranged on the frame 1 along the vertical direction. The lifting drive assembly 35 drives the lifting slide 341 to reciprocate on the lifting slide 34. The assembly seat rotating mechanism 33 is installed on the lifting slide 341. The lifting drive assembly 35 simultaneously drives the assembly seat rotating mechanism 33 and the steel ball assembly seat 32 to lift and lower, making the structure more reasonable and compact. The lifting drive assembly 35 is a driving member with a linear driving function, preferably a cylinder. The assembly seat rotating mechanism 33 is a driving member with a rotational driving function. In order to accurately control its rotation angle, a servo motor is preferably used. The steel ball assembly seat 32 is rotatably arranged on the lifting slide 341 and a synchronous wheel is fixed on the periphery. The assembly seat rotating mechanism 33 is linked to the rotation of the steel ball assembly seat 32 through a transmission belt.

[0033] A pushing drive assembly 64 is provided at the head end of the assembly transmission track 6 relative to the transmission direction. The pushing drive assembly 64 drives an assembly push rod 641 which moves along the assembly transmission track 6 and pushes the nut forward a nut length and then returns to its original position. On the one hand, the assembly push rod 641 forms a driving force to transmit the nut along the assembly transmission track 6, and on the other hand, ensures that the nut moves forward accurately and replaces the assembled nut to continue moving forward. The pushing drive assembly 64 is a driving component with a linear drive function, preferably a cylinder.

[0034] The nut feeding device 2 includes a nut source 21, a nut conveying track 22 and a nut side push mechanism 23. The nut conveying track 22 is arranged side by side with the assembly transmission track 6. The side of the end of the nut conveying track 22 relative to the transmission direction is connected to the side of the nut feeding position 61. The nut side push mechanism 23 includes a nut side push driving component 231 located on the other side of the assembly transmission track 6 relative to the nut conveying track 22. The nut side push driving component 231 drives the nut conveying track 22 relative to the transmission direction. The nut at the end is pushed toward the nut side push rod 232 of the nut feeding position 61, and the nut side push mechanism 23 places the nuts one by one on the assembly transmission track 6, so that the process of assembling nuts on the assembly transmission track 6 is more orderly and the position is more accurate, ensuring the reliability and smoothness of the assembly process. The nut side push drive component 231 is a drive component with a linear drive function, preferably a cylinder. In order to ensure the stable transmission of the nuts on the nut conveying track 22, the height of the nut conveying track 22 can be gradually lowered, and gravity is used to provide the driving force for forward transmission.

[0035] The discharging device 5 includes a discharging drive component 51, which is located on the side of the discharging position 63 and drives a discharging side push rod 52 which is provided to push the assembled finished product out of the assembly transmission track 6 from the side. The discharging side push rod 52 pushes the finished product out of the assembly transmission track 6 to realize automatic discharging of the finished product, and outputs the finished product in time to avoid hindering the subsequent assembly of the nut. The discharging drive component 51 is a driving component with a linear driving function, preferably a cylinder. After the discharging side push rod 52 pushes the finished product out of the assembly transmission track 6, in order to facilitate the collection of the finished product, a ramp 53 with a gradually decreasing height is provided, and the ramp 53 guides the product to the finished product collection area outside the frame 1.

Claims

1. An automatic nut assembly machine for anti-theft, characterized in that: It comprises a frame and a nut feeding device, a steel ball feeding device, a plastic liner feeding device, a discharging device and an assembly transmission track arranged on the frame. The assembly transmission track has a nut feeding position where the nut feeding device sequentially places nuts on the assembly transmission track, an assembly position where the steel ball feeding device assembles steel balls into nuts and then the plastic liner feeding device assembles them into nuts, and a discharging position where the discharging device moves the assembled finished products out of the assembly transmission track. The steel ball feeding device comprises a steel ball source, a steel ball assembly seat, an assembly seat lifting mechanism and an assembly seat rotating mechanism. The steel ball assembly seat is located above the assembly position, is lifted and lowered by the assembly seat lifting mechanism, and is rotated by the assembly seat rotating mechanism. The steel ball assembly seat is adapted to the shape of the inner side of the nut. The steel ball assembly seat is provided with a feeding channel corresponding to each placement groove on the inner side of the nut. The feeding channel has a steel ball inlet located at the upper end of the steel ball assembly seat and a steel ball outlet located at the lower side of the steel ball assembly seat. The steel ball inlet is connected to the steel ball source. The assembly seat lifting mechanism drives the steel ball assembly seat to descend, and the steel ball assembly seat extends into the nut located at the assembly position until the steel ball outlet is flush with the height of the placement groove. The steel balls of the steel ball source enter the feeding channel from the steel ball inlet and reach the steel ball outlet. The assembly seat rotating mechanism drives the steel ball assembly seat to rotate and the steel balls fall into the placement groove when passing through the placement groove. The assembly seat lifting mechanism drives the steel ball assembly seat to rise and return to the initial position. The plastic liner feeding device comprises a liner source, a liner conveying track and a liner lifting mechanism. The head end of the liner conveying track relative to the conveying direction is connected to the liner source as a liner feeding end, and the plastic liner is arranged in sequence on the liner conveying track. The end of the liner conveying track relative to the conveying direction is located below the assembly position as a liner discharge end. The liner lifting mechanism lifts up the plastic liner located at the liner discharge end. After the plastic liner enters the inner side of the nut, the assembly seat lifting mechanism drives the steel ball assembly seat to rise. After the assembly is in place, the liner lifting mechanism returns to the liner discharge end. The assembly seat lifting mechanism comprises a lifting slide, a lifting slide and a lifting drive assembly, wherein the lifting slide is fixedly arranged on the frame in the vertical direction, the lifting drive assembly drives the lifting slide to reciprocate on the lifting slide, and the assembly seat rotating mechanism is installed on the lifting slide.

2. The automatic anti-theft nut assembly machine according to claim 1 is characterized in that: The liner lifting mechanism comprises a lifting material driving assembly and a lifting rod which is lifted and lowered under the drive of the lifting material driving assembly. The top of the lifting rod passes through the bottom of the liner conveying track and constitutes a part of the liner conveying track.

3. The automatic anti-theft nut assembly machine according to claim 1 is characterized in that: A push drive assembly is arranged at the head end of the assembly transmission track relative to the transmission direction, and the push drive assembly drives an assembly push rod which moves along the assembly transmission track and pushes the nut forward by a nut length and then returns to its original position.

4. The automatic anti-theft nut assembly machine according to claim 1 is characterized in that: The nut feeding device includes a nut source, a nut conveying track and a nut side-pushing mechanism. The nut conveying track is arranged side by side with the assembly transmission track. The side of the end of the nut conveying track relative to the transmission direction is connected to the side of the nut feeding position. The nut side-pushing mechanism includes a nut side-pushing driving assembly located on the other side of the assembly transmission track relative to the nut conveying track. The nut side-pushing driving assembly drives a nut side push rod that pushes the nut located at the end of the nut conveying track relative to the transmission direction to the nut feeding position.

5. The automatic assembling machine for anti-theft nuts according to claim 1 is characterized in that: The discharging device comprises a discharging drive assembly, which is located on the side of the discharging position and drives a discharging side push rod which is provided to push the assembled finished product out of the assembly transmission track from the side.

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