CN211540181U - Left-wheel type screw locking mechanism - Google Patents

Abstract

The utility model discloses a mechanism is paid to left round formula screw lock, include the frame and rack-mounted electricity batch, the electricity batch can reciprocate, the frame lower part is equipped with the bearing plate, install on the bearing plate and can wind vertical axis pivoted compass, the compass is in the electricity batch below, be provided with a plurality of adsorption equipment that adopt the vacuum adsorption mode to absorb the screw along circumference on the compass, it adsorbs the screw simultaneously for a plurality of adsorption equipment lower surfaces to correspond left round formula screw lock mode of paying, the electricity batch head of electricity batch passes adsorption equipment from the top down and realizes the screw lock and pay, the electricity batch head withdraws from adsorption equipment, through rotating the repeated locking process of paying of compass, the lock of all screws on the completion compass is paid, this lock is paid the mechanism commonality better, the suitability is stronger, the lock is paid more accurately.

Description

Left-wheel type screw locking mechanism

Technical Field

The utility model relates to an automatic lock screw mechanical equipment field especially relates to a mechanism is paid to left-hand wheel formula screw lock.

Background

Nowadays, many electronic product enterprises adopt automatic screw machine to lock the screw and pay, use automatic screw lock to pay equipment, can reduce the tedious work load of workman, improve the work efficiency and the accuracy that the screw lock was paid, reduce the defective rate of product, reduction in production cost improves enterprise competitiveness.

Traditional automatic screw machine mostly is single screw absorption lock and pays, locks before paying the mechanism and all need carry out the screw absorption operation each time promptly, along with the development of trade, diversified automatic screw machine has appeared, though single absorption screw operation can satisfy many screw locks temporarily through locking many times and pay the demand, nevertheless to some large-scale products, for example display backplate etc. the screw quantity that needs to lock and pay is very much, then single absorption screw operation remains further to be improved. Therefore, a rotating disc type automatic screw machine is developed to realize the function of simultaneously sucking a plurality of screws for locking, and the locking efficiency is improved. However, the existing rotating disc type automatic screw machine mostly adopts a magnetic type, for example, patent CN204195214U proposes a compass type multifunctional screw machine, which adopts a mode that an electric screwdriver head is equipped with a magnetic ring, and realizes screw locking through the cooperation of a compass and a copper sleeve, obviously, the automatic locking structure is more complex and has the following problems: the magnetic attraction is influenced by magnetic force, so that the unstable situation exists, the magnetic force is too small, the screw can fall off in the locking process, and the magnetic force is too large, so that certain damage to certain electronic products can be generated. On the other hand, this patent needs the electric screwdriver head to carry out special preparation, need be equipped with a plurality of special electric screwdriver heads of special to different specification screws, and the commonality is relatively weak, and owing to the adoption be the mode of magnetism, to some non-magnetic material screws, this equipment can't be suitable for. In order to improve the universality of the equipment and make the operation more stable, the existing automatic screw locking device needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a good just adsorb more stable left-hand wheel formula screw lock of screw mechanism is paid to the commonality.

In order to solve the technical problem, the technical solution of the utility model is that:

a left-wheel screw locking mechanism comprises a rack and an electric screwdriver arranged on the rack, wherein an electric screwdriver seat capable of moving up and down is arranged on the rack, the electric screwdriver is fixedly arranged on the electric screwdriver seat and can move up and down along with the electric screwdriver seat, a supporting plate is arranged on the lower portion of the rack, a compass capable of rotating around a vertical axis is arranged on the supporting plate through a conical bearing, the compass is arranged below the electric screwdriver, a plurality of adsorption devices for adsorbing screws in a vacuum adsorption mode are arranged on the compass along the circumferential direction, the screws are adsorbed on the lower surfaces of the adsorption devices, and the head of the electric screwdriver penetrates through the adsorption devices from top to bottom to realize screw locking.

Preferably, the electric screwdriver seat is vertically and slidably mounted on the rack through a guide rail, a nut pair is further arranged on the electric screwdriver seat and sleeved on an adaptive vertical screw rod, and a driving device for enabling the vertical screw rod to rotate around the axis of the vertical screw rod is arranged at one end of the vertical screw rod.

Preferably, the support plate is mounted on the frame in a vertically slidable manner, and the compass is mounted on the support plate through a conical bearing, and the conical bearing is horizontally arranged.

Preferably, a horizontal bull gear is fixedly mounted on the compass, a second motor for driving the compass is mounted on the support plate in the vertical direction of the output shaft, and a pinion meshed with the bull gear is fixedly mounted on the output shaft of the second motor.

Preferably, the compass comprises an upper compass and a lower compass which are matched with each other from top to bottom, a plurality of upper through holes are uniformly distributed on the upper compass in the circumferential direction, a plurality of lower through holes are distributed on the lower compass corresponding to the upper through holes, the aperture of each upper through hole is larger than that of each lower through hole, and the upper through holes and the lower through holes form a containing cavity for placing the adsorption device.

Preferably, the adsorption device comprises an upper guide sleeve adapted to the aperture of the upper through hole and a lower guide sleeve adapted to the aperture of the lower through hole, and the upper end of the lower guide sleeve is clamped in the upper guide sleeve and can move up and down in the upper guide sleeve; and an air hole is formed in the lower part of the side wall of the upper guide sleeve, and an elastic sealing sheet with a crack is arranged at the upper end opening of the upper guide sleeve.

Preferably, the lower opening of the lower guide sleeve is also inserted with a self-locking clamping sleeve, the lower half part of an inner hole of the self-locking clamping sleeve is a vertical hole, the upper half part forms an arc-shaped protrusion centripetally, and a buffer space is formed between the upper half part of the self-locking clamping sleeve and the inner wall of the lower guide sleeve.

Preferably, the compass is provided with a gas path pipeline which is tree-shaped and the tail end of the gas path pipeline is hermetically communicated with the gas hole, and the top end of the gas path pipeline is connected with a vacuum generator.

Preferably, a universal gas path pipe joint is arranged between the top end of the gas path pipe and the vacuum generator.

After the scheme is adopted, the utility model has the characteristics of it is following:

1. the screw is sucked in a vacuum adsorption mode, the structure is light and compact, the screw suction device is suitable for non-magnetic screws, the influence on workpieces is avoided, and the universality is better;

2. the modular design can change the number of screws sucked at a time by replacing the compass, and the detachable design of the self-locking clamping sleeve can ensure that the mechanism can be suitable for screws with various sizes and has stronger applicability;

3. when the lock is paid, the lower guide sleeve falls to be close to the workpiece to be locked, so that the screw cannot deviate in the locking process, and the locking is more accurate.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the combination of the frame and the screwdriver seat of the present invention;

fig. 3 is a perspective view of the compass and the second motor assembly of the present invention;

FIG. 4 is a schematic view of the gas path pipeline of the present invention;

fig. 5 is a sectional view of the adsorption device of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses a left wheel type screw locking mechanism, as shown in figure 1, which is a preferred embodiment of the utility model, and comprises a frame 1 and an electric screwdriver 3 arranged on the frame 1, wherein, the frame 1 is provided with an electric screwdriver seat 2 which can move up and down, the electric screwdriver 3 is fixedly arranged on the electric screwdriver seat 2 and can move up and down along with the electric screwdriver seat 2, the lower part of the frame 1 is provided with a support plate 5, the support plate 5 is provided with a compass 6 which can rotate around a vertical axis, the compass 6 is arranged below the electric screwdriver 3, the compass 6 is provided with a plurality of adsorption devices 7 which can absorb screws in a vacuum adsorption mode along the circumferential direction, the screws in the scheme can be common bolts or screws, the lower surface of the adsorption devices 7 adsorbs the screws, so that a plurality of screws are adsorbed on the lower surface of the compass 6 along the circumferential direction, the screws are aligned with screw holes of a workpiece one by one, the electric screwdriver head 31 of the electric screwdriver 3 passes through the adsorption devices 7 from top to directly screw into the screw, and (4) realizing screw locking, and after the compass 6 rotates for a circle and the screws of one circle are all locked, loading a new circle of screws through the adsorption device 7 again to repeat the locking process.

Specifically, as shown in fig. 1 and fig. 2, the electric screwdriver base 2 is vertically slidably mounted on the rack 1 through a guide rail, in this embodiment, the rack 1 is a vertically mounted plate-shaped structure, a vertical slide rail 11 is arranged on a vertical surface of the rack, the electric screwdriver base 2 is provided with a slide block 21 matched with the vertical slide rail 11 on a side surface close to the rack 1, the slide block 21 is slidably connected to the vertical slide rail 11, and the slide block 12 is matched with the slide rail 11 to guide and bear a load, and the electric screwdriver base 2 is vertically slid to play a limiting role. Still fixedly on the electricity criticize seat 2 and be equipped with nut pair 22, the vertical distribution of its screw hole, nut pair 22 cup joints on the vertical lead screw 12 of an adaptation, and vertical lead screw 12 one end is equipped with the drive arrangement who makes vertical lead screw 12 wind its axis rotation, and drive arrangement is the vertical decurrent first motor 4 of output shaft in this embodiment, and first motor 4, the cooperation of nut pair 22 and vertical lead screw 12 provide power for the electricity criticizes seat 2 and slides from top to bottom. Frame 1 upper end includes the C type fixed plate 14 of a crooked formation, first motor 4 fixed mounting is between C type fixed plate 14 and the output shaft is vertical downwards, the coaxial fixed connection of vertical lead screw 12 one end is on the output shaft of first motor 4, the coaxial fixed connection in output shaft lower extreme and the vertical lead screw 12 upper end of first motor 4 downwards promptly, the output shaft and the vertical lead screw 12 of first motor 4 can be connected through shaft coupling 124, further still can set up the bearing between frame 1 bottom and vertical lead screw 12, stability when improving the rotation of vertical lead screw 12. The electric screwdriver 3 is fixedly arranged on the electric screwdriver seat 2 through an L-shaped connecting piece 32, and the electric screwdriver seat 2 controls the electric screwdriver 3 to ascend and descend through the nut pair 22. In the screw locking process, different optimal screwing speeds exist at different stages, so that the first motor 4 can select a servo motor, the servo motor can control the rotating speed more accurately, the moving speed of the screwdriver is accurately controlled, and the accuracy of the screw locking is improved.

The rack 1 is provided with a bearing plate 5 for bearing the compass 6, similarly, the bearing plate 5 can be installed on the rack 1 in a vertical sliding manner, so that the compass 6 can slide up and down on the rack 1, the rack 1 is provided with a second slide rail 15 for installing the bearing plate 5, the second slide rail 15 is also vertically arranged, the bearing plate 5 is fixedly provided with a second slide block 51 matched with the second slide rail 15, and the second slide block 51 is connected to the second slide rail 15 in a sliding manner for guiding and bearing the load of the bearing plate and limiting the up-and-down sliding of the bearing plate 5. The compass 6 and the second motor 8 for driving the compass 6 to rotate are rotatably mounted on the support plate 5, specifically, the support plate 5 is horizontally disposed, the support plate 5 is provided with two through holes, which are a compass through hole 56 and a motor through hole 58, the output shaft of the second motor 8 is vertically mounted on the support plate 5, in this embodiment, the output shaft of the second motor 8 is vertically and downwardly mounted on the upper surface of the support plate 5, as shown in fig. 3, the output shaft passes through the motor through hole 58 and is fixedly mounted with a horizontal pinion 86, the compass 6 is rotatably mounted on the support plate 5 through a bearing, specifically, the compass 6 is coaxially provided with a mounting column 61, the mounting column 61 passes through the compass through hole 56 from bottom to top, the mounting column 61 and the compass through hole 56 are rotatably connected by using a conical bearing 65, and the conical bearing 65 can also realize bearing load while ensuring relative rotation, the conical bearing 65 is arranged horizontally. A horizontal large gear 68 is coaxially and fixedly arranged between the mounting column 61 and the compass disc body 62 on the compass 6, the large gear 68 and the small gear 86 under the supporting plate 5 are meshed with each other, and the second motor 8 drives the large gear 68 to rotate through the small gear 86, so that the whole compass 6 can rotate controllably.

The compass 6 comprises an upper compass 621 and a lower compass 622 which are mutually matched up and down, and the upper compass 621 and the lower compass 622 are covered together by a sealant 63 to form a compass disc body 62. As shown in fig. 4, a plurality of upper through holes 623 are uniformly distributed on the upper compass 621 in the circumferential direction, a plurality of lower through holes 624 are distributed on the lower compass 622 corresponding to the upper through holes 623, the aperture of the upper through holes 623 is larger than that of the lower through holes 624, and the upper through holes 623 and the lower through holes 624 form an accommodating cavity for placing the adsorption device 7. As shown in fig. 5, the adsorption device 7 includes an upper guide sleeve 71 adapted to the aperture of the upper through hole 623 and a lower guide sleeve 72 adapted to the aperture of the lower through hole 624, and the upper end of the lower guide sleeve 72 is clamped in the upper guide sleeve 71 and can move up and down in the upper guide sleeve 71; an air hole 73 is formed in the lower portion of the side wall of the upper guide sleeve 71, an elastic sealing sheet 74 with a crack is arranged at an upper end opening of the upper guide sleeve 71, the upper end opening of the upper guide sleeve 71 is sealed by the elastic sealing sheet 74 under the effect of no external force due to elastic materials of the elastic sealing sheet, the upper end of the upper guide sleeve 71 extends upwards out of an upper through hole 623 of an upper compass 621, a limiting cover 75 is covered and connected above the upper end of the upper guide sleeve 71, a limiting hole 76 which penetrates through the upper end and the lower end is formed in the center of the limiting cover 75, and the elastic sealing sheet 74 is. The lower opening of the lower guide sleeve 72 is also inserted with a self-locking cutting sleeve 77, the lower half part of the inner hole of the self-locking cutting sleeve 77 is a vertical hole, the upper half part centripetally forms an arc-shaped protrusion 78, and a buffer space 79 is arranged between the upper half part of the self-locking cutting sleeve 77 and the inner wall of the lower guide sleeve 72.

As shown in fig. 1, the negative pressure inside the adsorption device 7 is achieved through the vacuum generator 9 on the rack 1, specifically, as shown in fig. 3 and 4, the compass 6 is provided with the air passage pipe 64, the air passage pipe 64 is in tree-shaped distribution, the end of the air passage pipe 64 is hermetically communicated with the air hole 73 in the adsorption device 7, the top end of the air passage pipe 64 is connected with the vacuum generator 9, the vacuum generator 9 is provided with a T-shaped air passage 641, two branch air passages 642 and 4 i-shaped air passages 643 in sequence, the lower end of the T-shaped air passage 641 extends into the mounting column 61, and the lower end of the T-shaped air passage 641 extends horizontally towards both sides and then is opened 611 on the surface of. The air inlets 612 are respectively arranged in the middle of the two branch air paths 642 and connected with the surface opening 611 of the mounting column, the air path pipeline 64 is divided into four branches, the four branches are respectively guided to the middle of an I-shaped air path 643 from the inside of the compass 6, and each I-shaped air path 643 is correspondingly and respectively connected with two adjacent adsorption devices 7. Further, in order to avoid the phenomenon that the compass 6 rotates to enable a connecting pipe between the top end of the connecting air channel pipeline 64 and the vacuum generator 9 to be wound and knotted, a universal air channel pipeline joint 91 is arranged between the top end of the air channel pipeline 64 and the vacuum generator 9, the universal air channel pipeline joint 91 is a ball head structure with a through hole inside and a ball head seat matched with the ball head structure, the upper end of a ball head is directly butted with the vacuum generator, the lower end of the ball head is installed in the ball head seat, and the lower end of the ball head seat is provided with an opening which is directly butted with. During the application, even if the second motor 8 drives the compass 6 to rotate through the big and small gears, the ball head rotates and does not influence the compass 6 to rotate due to the action of the universal air channel pipe joint 91.

The locking mechanism is divided into two steps of adsorbing a screw and locking the screw, as shown in fig. 1-5, when adsorbing the screw, a self-locking cutting sleeve 77 matched with a screw nut is firstly selected to be inserted into the lower opening of the lower guide sleeve 72, the compass 6 is close to the screw supply device, negative pressure is formed in the inner spaces of the lower guide sleeve 72 and the upper guide sleeve 71 by utilizing the air hole 73 of the upper guide sleeve 71 and the vacuum generator 9 communicated with the air hole 73, the nut with larger guide area is firstly inserted into the self-locking cutting sleeve 77 by the adsorption effect of the negative pressure, the lower opening of the lower guide sleeve 72 is further deeply blocked along with the screw, the internal negative pressure is improved, the acting force of adsorbing the screw is further increased, the nut props up the upper half part of the self-locking cutting sleeve 77, and the corresponding upper half. Further, as the screw cap completely plugs the lower opening of the lower guide sleeve 72, the space negative pressure between the upper and lower guide sleeves 71, 72 makes the two move in opposite directions, the lower guide sleeve 72 slides upwards and makes the outer wall of the guide sleeve shield the air hole 73 of the upper guide sleeve 71, the lower guide sleeve 72 stays in the upper guide sleeve 73, so far, as a plurality of adsorption devices 7 are arranged, the vacuum generator 9 can realize the adsorption of a plurality of screws by one-time operation.

When the screw is locked, the vacuum generator 9 stops working, a screw on the compass 6 is aligned with a screw hole on a workpiece, the alignment of the screw and the screw hole is not discussed in the present application, for the purpose of realizing industrial control technology in the prior art, the details are not repeated herein, then the screwdriver 3 slides downwards, the screwdriver head 31 of the screwdriver 3 passes through the limiting hole 76 and then expands the elastic sealing sheet 74, after the elastic sealing sheet 74 is opened, the closed space inside the upper and lower guide sleeves 71 and 72 is damaged, the lower guide sleeve 72 slides downwards quickly under the action of gravity after pressure recovery, the lower end of the screw is inserted into the screw hole, the screwdriver head 31 further moves downwards and interacts with the upper end of the screw cap after sequentially passing through the centers of the upper and lower guide sleeves 71 and 72, and the screw locking is realized. The locking and paying electric screwdriver head 31 is upwards withdrawn from the compass 6, the compass 6 rotates at a specified angle under the control of the second motor 8, the next screw is aligned with the next screw hole, the electric screwdriver head 31 slides downwards again to repeat the locking and paying process, and the compass 6 adsorbs the screws again after all the screws adsorbed by the compass 6 are locked.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that all changes and modifications made according to the claims and the specification of the present invention should fall within the scope covered by the present invention.

Claims (9)

1. The utility model provides a mechanism is paid to left-hand wheel formula screw lock, includes the frame and installs the electricity in the frame and criticize its characterized in that: the electric screwdriver is characterized in that an electric screwdriver seat capable of moving up and down is installed on the rack, the electric screwdriver is fixedly installed on the electric screwdriver seat and can move up and down along with the electric screwdriver seat, a supporting plate is arranged on the lower portion of the rack, a compass capable of rotating around a vertical axis is installed on the supporting plate through a conical bearing, the compass is arranged below the electric screwdriver, a plurality of adsorption devices capable of sucking screws in a vacuum adsorption mode are arranged on the compass along the circumferential direction, the screws are adsorbed on the lower surfaces of the adsorption devices, and the head of the electric screwdriver penetrates through the adsorption devices from top to bottom to achieve screw locking.

2. The left-wheel screw locking mechanism of claim 1, wherein: the electric screwdriver seat is installed on the rack in a vertically sliding mode through a guide rail, a nut pair is further arranged on the electric screwdriver seat and sleeved on an adaptive vertical screw rod, and a driving device enabling the vertical screw rod to rotate around the axis of the vertical screw rod is arranged at one end of the vertical screw rod.

3. The left-wheel screw locking mechanism of claim 1, wherein: the bearing plate can be installed on the frame in a vertically sliding mode, the compass is installed on the bearing plate through the conical bearing, and the conical bearing is horizontally arranged.

4. The left-wheel screw locking mechanism of claim 1, wherein: a horizontal bull gear is fixedly installed on the compass, a second motor which is used for driving the compass and has an output shaft in the vertical direction is installed on the supporting plate, and a pinion which is meshed with the bull gear is fixedly installed on the output shaft of the second motor.

5. The left-wheel screw locking mechanism of claim 1, wherein: the compass comprises an upper compass and a lower compass which are matched with each other from top to bottom, a plurality of upper through holes are uniformly distributed on the upper compass in the circumferential direction, a plurality of lower through holes are distributed on the lower compass corresponding to the upper through holes, the aperture of each upper through hole is larger than that of each lower through hole, and the upper through holes and the lower through holes form a containing cavity for placing the adsorption device.

6. The left-wheel screw locking mechanism of claim 5, wherein: the adsorption device comprises an upper guide sleeve adaptive to the aperture of the upper through hole and a lower guide sleeve adaptive to the aperture of the lower through hole, and the upper end of the lower guide sleeve is clamped in the upper guide sleeve and can move up and down in the upper guide sleeve; and an air hole is formed in the lower part of the side wall of the upper guide sleeve, and an elastic sealing sheet with a crack is arranged at the upper end opening of the upper guide sleeve.

7. The left-wheel screw locking mechanism of claim 6, wherein: the lower opening of the lower guide sleeve is also inserted with a self-locking clamping sleeve, the lower half part of an inner hole of the self-locking clamping sleeve is a vertical hole, the upper half part forms an arc-shaped protrusion centripetally, and a buffer space is formed between the upper half part of the self-locking clamping sleeve and the inner wall of the lower guide sleeve.

8. The left-wheel screw locking mechanism of claim 6, wherein: the compass is provided with a gas path pipeline which is tree-shaped and the tail end of the gas path pipeline is communicated with the gas hole in a sealing way, and the top end of the gas path pipeline is connected with a vacuum generator.

9. The left-wheel screw locking mechanism of claim 8, wherein: and a universal gas path pipeline joint is arranged between the top end of the gas path pipeline and the vacuum generator.

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