Screw driving device

Abstract

The utility model discloses a screw driving device. The screw driving device comprises a mounting plate, a hollow suction nozzle, a screw tool, a lifting block and a Z-axis pressure mechanism, the lifting block is arranged on the mounting plate in a sliding mode, and the sliding direction is the Z-axis direction. The hollow suction nozzle is arranged below the lifting block; the screw tool is arranged on the lifting block, and a screwdriver head of the screw tool extends into the hollow suction nozzle; and the Z-axis pressure mechanism is arranged on the mounting plate, and the Z-axis pressure mechanism is further connected with the lifting block so as to keep the working pressure of the screwdriver blade. In the process of screwing the screw, the assembling position of the hollow suction nozzle on the rotating screw is ensured, the screw screwing device can automatically and stably screw the screw to the assembling position, and the automatic screw screwing device has a good automatic effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to an automatic assembly equipment technical field especially relates to a screwing device. BACKGROUND

[0002] Screws are usually standard parts commonly used for product fastening, and are widely and massively used in industrial products. They have good detachability, and the assembly and disassembly tools are mature, and the application cost is low.

[0003] In general assembly lines, pneumatic screw tools are often used to tighten or loosen screws. In the overall production line, air compressors, pneumatic drive control structures and high-pressure pipelines are equipped, so that high-pressure sources can be supplied to the pneumatic screw tools on the production line through the high-pressure pipelines, large quantities of low-cost pneumatic screw tools are driven, and the efficiency of screw assembly on the production line is improved.

[0004] However, in the production line, operators are still needed at each screw assembly post to manually screw the screws, and the degree of automation is low. UTILITY MODEL CONTENT

[0005] In order to solve the technical problem of low screwing automation degree in the prior art, one of the purposes of the utility model is to provide a screwing device.

[0006] One of the purposes of the utility model is achieved by the following technical scheme:

[0007] A screwing device, the screwing device comprises a mounting plate, a hollow suction nozzle, a screw tool, a lifting block and a Z-axis pressure mechanism;

[0008] The lifting block is slidingly arranged on the mounting plate, and the sliding direction is the Z-axis direction;

[0009] The hollow suction nozzle is arranged below the lifting block;

[0010] The screw tool is arranged on the lifting block, and a screwdriver bit of the screw tool extends into the hollow suction nozzle;

[0011] The Z-axis pressure mechanism is arranged on the mounting plate, and the Z-axis pressure mechanism is also connected with the lifting block to maintain the working pressure of the screwdriver bit.

[0012] Optionally, the hollow suction nozzle comprises a suction head, and a suction hole for sucking screws is arranged at the lower end of the suction head;

[0013] A negative pressure cavity and a first through hole are arranged in the suction head, the first through hole penetrates the suction head up and down, the first through hole is in communication with the suction hole, and the negative pressure cavity is in communication with the suction hole;

[0014] The lower end of the screwdriver head extends into the negative pressure cavity through the first through hole.

[0015] Optionally, the upper end of the suction head is provided with a fitting opening.

[0016] The hollow suction nozzle further comprises a mounting head and a locking nut, the lower part of the mounting head is provided with a connecting part, the connecting part extends into the fitting opening and is connected with the upper end of the suction head, the mounting head is provided with a second through hole through which the screwdriver head passes, and the second through hole is in communication with the negative pressure cavity.

[0017] The screwdriver head extends into the first through hole through the second through hole.

[0018] Optionally, the negative pressure cavity is located at the upper end of the suction head, the negative pressure cavity is in communication with the fitting opening, and the negative pressure cavity is in communication with the first through hole.

[0019] Optionally, the inner wall of the negative pressure cavity is provided with an air inlet hole and an air outlet hole.

[0020] The mounting head is further provided with a protection tube, the protection tube is located at the lower part of the connecting part, and the protection tube extends into the negative pressure cavity and passes through the air inlet hole and the air outlet hole.

[0021] Optionally, the mounting head is provided with a bearing hole.

[0022] The hollow suction nozzle further comprises a sealing bearing and a snap spring, the sealing bearing is arranged in the bearing hole, and the snap spring is arranged in the bearing hole and located outside the sealing bearing.

[0023] The screwdriver head is connected with the mounting head through the sealing bearing.

[0024] Optionally, the screw driving device further comprises a Z-axis sliding mechanism, and the Z-axis sliding mechanism is arranged on the mounting plate.

[0025] The lifting block is arranged on the Z-axis sliding mechanism.

[0026] Optionally, the Z-axis sliding mechanism comprises a Z-axis guide rail and a Z-axis sliding block, the Z-axis guide rail is arranged on the mounting plate in the direction of the Z-axis, and the Z-axis sliding block is slidingly arranged on the Z-axis guide rail.

[0027] The lifting block is arranged on the Z-axis sliding block.

[0028] Optionally, the Z-axis pressure mechanism comprises a pneumatic push rod.

[0029] Optionally, the Z-axis pressure mechanism further comprises a pressure controller in electrical signal connection with the Z-axis pressure mechanism for controlling the pressure applied by the Z-axis pressure mechanism to the lifting block.

[0030] Compared with the prior art, the utility model has the beneficial effects that:

[0031] In the utility model, the screwdriver bit of the screw tool is inserted into the hollow suction nozzle, the screw is adsorbed by the hollow suction nozzle, the Z-axis pressure mechanism applies pressure to the lifting block, and the screwdriver bit applies pressure to the screw. In this way, when the screw tool drives the screwdriver bit to rotate, the screwdriver bit can drive the screw to rotate. And with the rotation of the screw, the Z-axis pressure mechanism continuously applies pressure to the lifting block, so that the screwdriver bit maintains pressure on the screw during the entire working process, ensuring that the screwdriver bit stably drives the screw to rotate. In the process of screwing the screw, the hollow suction nozzle ensures that the screw is assembled to the position, and the screwing device can automatically and stably screw the screw to the assembly position, having good automatic effect. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structural schematic view of the screwing device of the utility model;

[0033] Figure 2 It is a structural schematic view of the screwing device of the utility model from another perspective;

[0034] Figure 3 It is an exploded view of the screwing device of the utility model;

[0035] Figure 4 It is a sectional view of the hollow suction nozzle of the screwing device of the utility model.

[0036] BRIEF DESCRIPTION OF DRAWINGS

[0037] 1, mounting plate;

[0038] 2, hollow suction nozzle;21, suction head;211, adsorption hole;212, negative pressure cavity;213, first through hole;214, assembly port;215, air inlet hole;216, air outlet hole;22, mounting head;221, connecting part;222, second through hole;223, protection tube;224, bearing hole;23, locking nut;24, sealing bearing;25, clamping spring;

[0039] 3, screw tool;31, screwdriver bit;

[0040] 4, lifting block;

[0041] 5, Z-axis pressure mechanism;51, pneumatic push rod;52, pressure controller;

[0042] 6, suction nozzle support;

[0043] 7. Z-axis sliding mechanism. Detailed Implementation

[0044] The following will refer to the appendices in the embodiments of this application. Figure 1 To be continued Figure 4 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application 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 indicator will also change accordingly.

[0046] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0047] like Figures 1-3 The screw-driving device shown includes a mounting plate 1, a hollow suction nozzle 2, a screw tool 3, a lifting block 4, and a Z-axis pressure mechanism 5.

[0048] Mounting plate 1 serves as a direct or indirect mounting structure for the hollow suction nozzle 2, screw tool 3, lifting block 4, and Z-axis pressure mechanism 5. The lifting block 4 is slidably mounted on mounting plate 1 along the Z-axis. Specifically, the lifting block 4 can directly slide against mounting plate 1, or it can slide against mounting plate 1 using other structures, thereby guiding the screw tool 3 to perform stable and precise lifting movements. The hollow suction nozzle 2 is positioned below the lifting block 4. The screw tool 3 is mounted on the lifting block 4 and has a detachable screwdriver head 31 that extends into the hollow suction nozzle 2. The Z-axis pressure mechanism 5 is mounted on mounting plate 1 and is also connected to the lifting block 4 to maintain the working pressure of the screwdriver head 31.

[0049] In the utility model, screwdriver bit 31 of screw tool 3 extends into hollow suction nozzle 2, and hollow suction nozzle 2 is used to adsorb screw, Z-axis pressure mechanism 5 exerts pressure on lifting block 4, so that screwdriver bit 31 exerts pressure on screw, in this way, when screw tool 3 drives screwdriver bit 31 to rotate, screwdriver bit 31 can drive screw to rotate.And with the rotation of screw, Z-axis pressure mechanism 5 continuously exerts pressure on lifting block 4, so that screwdriver bit 31 keeps pressure on screw in the whole working process, ensuring that screwdriver bit 31 stably drives screw to rotate.In the process of screwing, the assembly position of hollow suction nozzle 2 to screw is ensured, and the screwing device can automatically and stably screw the screw to the assembly position, and has good automatic effect.

[0050] For hollow suction nozzle 2, as shown in Figure 3 、 Figure 4 , hollow suction nozzle 2 includes suction head 21, and the lower end of suction head 21 is provided with adsorption hole 211 for sucking screw.Suction head 21 is provided with negative pressure cavity 212 and first through hole 213, and first through hole 213 penetrates suction head 21 from top to bottom, first through hole 213 is communicated with adsorption hole 211, and negative pressure cavity 212 is communicated with adsorption hole 211.The lower end of screwdriver bit 31 extends into negative pressure cavity 212 through first through hole 213.Suction head 21 is connected with external negative pressure device such as air suction pump through pipeline, so that negative pressure is generated in negative pressure cavity 212.In suction head 21, the negative pressure in negative pressure cavity 212 is used to make adsorption hole 211 adsorb screw, and at least the head of screw is in adsorption hole 211 before screw is completely assembled, so that screw is stably sucked, and screw is prevented from falling during assembly.

[0051] Further, as shown in Figure 4 , the upper end of suction head 21 is provided with assembly opening 214.Hollow suction nozzle 2 further includes mounting head 22 and locking nut 23, and the lower part of mounting head 22 is provided with connecting part 221, connecting part 221 extends into assembly opening 214 and is connected with the upper end of suction head 21, and mounting head 22 is provided with second through hole 222 for screwdriver bit 31 to pass through, and second through hole 222 is communicated with negative pressure cavity 212.Screwdriver bit 31 extends into first through hole 213 through second through hole 222.In addition, mounting plate 1 is provided with suction nozzle support 6, and suction nozzle support 6 is provided with mounting hole, mounting head 22 passes through mounting hole, and mounting head 22 is locked by locking nut 23.Suction head 21 is connected with connecting part 221 of mounting head 22 through assembly opening 214, in this way, the fixed mounting of suction head 21 is realized, and the fixed mounting of hollow suction nozzle 2 is also realized.

[0052] In addition, negative pressure cavity 212 can be located in the middle or lower end of suction head 21, or can be located in the upper end of suction head 21, and the utility model preferably locates negative pressure cavity 212 in the upper end of suction head 21.

[0053] Further, the negative pressure cavity 212 is in communication with the assembly port 214 and the first through hole 213. In detail, the assembly port 214 and the negative pressure cavity 212 are the same cavity structure, the assembly port 214 is at the outer end, and the negative pressure cavity 212 is at the inner end, that is, the assembly port 214 is at the upper end, and the negative pressure cavity 212 is at the lower end. More specifically, the assembly port 214 is internally threaded, the connecting portion 221 is externally threaded, and the connecting portion 221 is threadedly connected to the upper end of the bit head 21. The screwdriver bit 31 passes through the mounting head 22, the negative pressure cavity 212, and the first through hole 213 in sequence.

[0054] In some specific embodiments of the hollow bit 2, as shown in Figure 4 the inner wall of the negative pressure cavity 212 is provided with an air inlet hole 215 and an air outlet hole 216, and interfaces are arranged at the air inlet hole 215 and the air outlet hole 216. The interfaces at the air inlet hole 215 and the air outlet hole 216 are respectively connected to a high-pressure pipeline and a negative pressure pipeline, and the high-pressure pipeline and the negative pressure pipeline are respectively connected to a high-pressure gas source and a vacuum pump. The mounting head 22 is further provided with a protection tube 223, which is located at the lower part of the connecting portion 221 and extends into the negative pressure cavity 212 and beyond the air inlet hole 215 and the air outlet hole 216. When the screwdriver bit 31 passes through the negative pressure cavity 212, the airflow in the negative pressure cavity 212 will rapidly flow to the air outlet hole 216, generating a large lateral pressure on the screwdriver bit 31. Due to the large length of the screwdriver bit 31, the screwdriver bit 31 will be slightly biased laterally, increasing the friction between the screwdriver bit 31 and the hollow bit 2, reducing the rotation speed of the screwdriver bit 31, increasing the wear of the screwdriver bit 31, and reducing the service life. After the protection tube 223 is arranged, the protection tube 223 extends to the area where the lateral airflow is generated, and the lateral pressure is borne by the protection tube 223 on the mounting head 22. The protection tube 223 is from the mounting head 22 and has a low overall length, and has a greater pressure bearing capacity, thereby effectively protecting the screwdriver bit 31, avoiding the pressure bias of the screwdriver blade, and enabling the screwdriver bit 31 to be normally assembled and rotated.

[0055] In some further embodiments of the screw driving device, as shown in Figure 4 the mounting head 22 is provided with a bearing hole 224, and in particular, the upper end of the mounting head 22 is provided with the bearing hole 224. The hollow bit 2 further includes a sealing bearing 24 and a snap spring 25. The sealing bearing 24 is arranged in the bearing hole 224, and the snap spring 25 is arranged in the bearing hole 224 and located outside the sealing bearing 24, and is used for assembly limiting of the sealing bearing 24. The screwdriver bit 31 is connected to the mounting head 22 through the sealing bearing 24. By arranging the sealing bearing 24 at the upper end of the mounting head 22, the sealing effect of the mounting head 22 is increased, and air leakage of the mounting head 22 is prevented or reduced.

[0056] In some further embodiments of the screw driving device, as shown in Figure 2 , Figure 3As shown, the screw-driving device also includes a Z-axis sliding mechanism 7, which is mounted on the mounting plate 1. A lifting block 4 is mounted on the Z-axis sliding mechanism 7. Specifically, the Z-axis sliding mechanism 7 includes a Z-axis guide rail and a Z-axis slider. The Z-axis guide rail is mounted on the mounting plate 1 along the Z-axis direction, and the Z-axis slider is slidably mounted on the Z-axis guide rail. The lifting block 4 is mounted on the Z-axis slider.

[0057] Specifically, the Z-axis pressure mechanism 5 includes a pneumatic push rod 51 or a pneumatic component such as a cylinder. In this embodiment of the invention, a pneumatic push rod 51 is preferred.

[0058] Furthermore, such as Figure 3 As shown, the Z-axis pressure mechanism 5 also includes a pressure controller 52, which is electrically connected to the Z-axis pressure mechanism 5 and is used to control the pressure applied by the Z-axis pressure mechanism 5 to the lifting block 4.

[0059] In other embodiments of the Z-axis pressure mechanism 5, the Z-axis pressure mechanism 5 includes an electric push rod and a pressure sensor. The output end of the electric push rod is connected to the pressure sensor, and the pressure sensor is connected to the lifting block 4. In this way, pressure can be maintained on the lifting block 4 by the electric push rod, and the output of the electric push rod can be controlled by the electrical signal generated by the pressure sensor, so that the screwdriver head 31 maintains appropriate pressure on the screw during operation.

[0060] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A screw driving device, characterized by, The screwing device comprises a mounting plate, a hollow suction nozzle, a screw tool, a lifting block and a Z-axis pressure mechanism; The lifting block is slidingly arranged on the mounting plate in a Z-axis direction; The hollow suction nozzle is arranged below the lifting block; The screw tool is arranged on the lifting block, and a screwdriver head of the screw tool extends into the hollow suction nozzle; The Z-axis pressure mechanism is arranged on the mounting plate and is further connected with the lifting block to maintain the working pressure of the screwdriver head.

2. The screw driving device of claim 1 wherein, The hollow suction nozzle comprises a suction head, and a lower end of the suction head is provided with a suction hole for sucking screws; The suction head is provided with a negative pressure cavity and a first through hole, the first through hole penetrates the suction head from top to bottom, the first through hole is in communication with the suction hole, and the negative pressure cavity is in communication with the suction hole; The lower end of the screwdriver head extends into the negative pressure cavity through the first through hole.

3. The screwing device according to claim 2, wherein An upper end of the suction head is provided with a fitting port; The hollow suction nozzle further comprises a mounting head and a locking nut, a lower part of the mounting head is provided with a connecting part, the connecting part extends into the fitting port and is connected with the upper end of the suction head, the mounting head is provided with a second through hole through which the screwdriver head passes, and the second through hole is in communication with the negative pressure cavity; The screwdriver head extends into the first through hole through the second through hole.

4. The screwing device according to claim 3, wherein The negative pressure cavity is located at the upper end of the suction head, the negative pressure cavity is in communication with the fitting port, and the negative pressure cavity is in communication with the first through hole.

5. The screwing device according to claim 4, wherein An inner wall of the negative pressure cavity is provided with an air inlet hole and an air outlet hole; The mounting head is further provided with a protection tube, the protection tube is located at the lower part of the connecting part, and the protection tube extends into the negative pressure cavity and passes through the air inlet hole and the air outlet hole.

6. The screw driving device of claim 3 wherein, A bearing hole is arranged on the mounting head; The hollow suction nozzle further comprises a sealing bearing and a clamping spring, the sealing bearing is arranged in the bearing hole, and the clamping spring is arranged in the bearing hole and located outside the sealing bearing; The screwdriver head is connected with the mounting head through the sealing bearing.

7. The screw driving device of claim 1 wherein, The screwing device further comprises a Z-axis sliding mechanism, and the Z-axis sliding mechanism is arranged on the mounting plate; The lifting block is arranged on the Z-axis sliding mechanism.

8. The screw driving device of claim 7 wherein, The Z-axis sliding mechanism comprises a Z-axis guide rail and a Z-axis sliding block, the Z-axis guide rail is arranged on the mounting plate in a Z-axis direction, and the Z-axis sliding block is slidingly arranged on the Z-axis guide rail; The lifting block is arranged on the Z-axis sliding block.

9. The screw driving device of claim 1 wherein, The Z-axis pressure mechanism comprises a pneumatic push rod.

10. The screw driving device of claim 9, wherein The Z-axis pressure mechanism further comprises a pressure controller, the pressure controller is electrically connected with the Z-axis pressure mechanism, and is used for controlling the pressure applied by the Z-axis pressure mechanism to the lifting block.

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