Automatic hollow bolt conveying and detecting device

Abstract

An automatic hollow bolt conveying and detecting device comprises a rack, a straight vibrator fixed to the rack, a conveying rail arranged on the upper end face of the straight vibrator, a bolt picking device, a first air cylinder and a hollow bolt inner hole detecting device arranged on the rack and located between the conveying rail and a bolt clamping device. The hollow bolt inner hole detection device comprises a lifting support and a displacement sensor, the displacement sensor is installed on a bending arm at the upper end of the lifting support, the lower end of the lifting support is connected and fixed to a piston rod, extending upwards, of a second air cylinder, and the second air cylinder is installed on the rack and used for driving the lifting support to move up and down. The bolt picking device is arranged on the conveying rail, drives a measuring shaft of the displacement sensor to move up and down and is used for detecting the diameter of an inner hole of the hollow bolt conveyed on the conveying rail, and the bolt picking device is driven by a first air cylinder to convey qualified hollow bolts to a preset position or reject unqualified hollow bolts.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt conveying device field, concretely relates to a bolt automatic conveying and picking device. BACKGROUND

[0002] In the automobile manufacturing process, in order to realize efficient and accurate assembly, usually need to be through the robot and install a kind of hollow bolt with internal thread and external thread simultaneously.This process needs to be matched with the conveying device, hollow bolt is conveyed to the specified position that robot can pick up, so that robot completes subsequent pick-up, tightening and assembly operation.

[0003] In the prior art, CN115464383B discloses an automatic nail feeding device, which makes the screw transfer and fall into the nail separator through the vibration of the straight vibrator, then the double guide rod cylinder and the rail displacement cylinder displace the screw in the nail separator to the starting working position of the screw clamp, and the screw is moved to the position that the robot can pick up by the screw clamp;However, the device has the following deficiencies:

[0004] 1. cannot pick hollow bolts with non-standard inner hole specifications;When the inner hole diameter of the hollow bolt does not meet the design standard, the parts that should be assembled in the inner hole of the hollow bolt in the subsequent production process will not be able to realize normal thread cooperation with the internal thread, which directly leads to assembly failure or substandard product performance.

[0005] 2. lack of clamping detection function;The device cannot detect whether the hollow bolt is successfully clamped in the screw clamp.If the clamp fails to successfully clamp the screw from the nail separator, the robot cannot pick up the screw at the specified position, which will lead to the problem of missing assembly or missing tightening, and further affect the continuity of the assembly line and the quality of finished products. SUMMARY

[0006] The utility model aims at the corresponding deficiencies of prior art, provides a kind of hollow bolt automatic conveying and detection device;The device can detect the inner hole size of hollow bolt, eliminate unqualified bolt, and convey qualified bolt, so as to effectively avoid the assembly problem caused by unqualified bolt size.

[0007] The utility model aims at the following scheme realization:

[0008] The utility model relates to an automatic hollow bolt conveying and detecting device, which comprises a rack, a straight vibrator fixed on the rack, a conveying track arranged on the upper end surface of the straight vibrator, a bolt picking device, a first cylinder, a hollow bolt hole detecting device arranged on the rack and located between the conveying track and the bolt clamping device, the hollow bolt hole detecting device comprising a lifting support and a displacement sensor, the displacement sensor being mounted on the bent arm at the upper end of the lifting support, the lower end of the lifting support being connected to the upwardly extending piston rod of a second cylinder, the second cylinder being mounted on the rack to drive the lifting support to move up and down and drive the measuring shaft of the displacement sensor to move up and down for detecting the hole diameter of the hollow bolt conveyed on the conveying track, the bolt picking device being driven by the first cylinder to send the qualified hollow bolt to a predetermined position or to remove the unqualified hollow bolt.

[0009] Preferably, the bolt picking device comprises a gripper support and a pneumatic gripper, the gripper support being slidingly fitted on the rack for horizontal movement, the piston rod of the first cylinder being fixedly connected to the gripper support, and the pneumatic gripper being fixed to the gripper support for sending the qualified hollow bolt to a predetermined position.

[0010] Preferably, a detection device is arranged on the bolt picking device corresponding to the pneumatic gripper for detecting whether the pneumatic gripper holds the hollow bolt.

[0011] Preferably, the detection device is an optical sensor.

[0012] Preferably, one side of the conveying track is provided with a counting sensor for counting the number of hollow bolts conveyed on the conveying track.

[0013] Preferably, a waste box is arranged on the rack below the bolt clamping device.

[0014] Preferably, the rack is provided with an air path control valve, a communication device and a controller.

[0015] Preferably, the conveying track comprises two parallel support plates, a channel being formed between the two support plates, the width of the channel being greater than the diameter of the bolt rod and less than the diameter of the bolt head.

[0016] Preferably, the conveying track comprises an inlet section, a connecting section and a conveying section, the inlet section and the conveying section being horizontally arranged and connected by the inclined connecting section, the height of the inlet section being higher than that of the conveying section.

[0017] Preferably, a protective cover plate is arranged above the conveying section.

[0018] The utility model has the advantages of the following:

[0019] The inner hole size of the hollow bolt can be detected, the hollow bolt with the inner hole diameter not meeting the design standard is selected, and the hollow bolt with the inner hole diameter meeting the design standard is conveyed to a specified position capable of being picked up by the robot; the clamping detection function is provided to confirm whether the pneumatic clamping gripper clamps the hollow bolt, so that the problem of missing loading or missing tightening of the hollow bolt due to the failure of the robot to grab the hollow bolt is effectively avoided; the system has high automation and intelligence, high production efficiency and low defective product rate, and meets the needs of modern industrial assembly production lines. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model;

[0021] Figure 2 It is a structural schematic view of the A direction of Figure 1

[0022] Figure 3 It is a structural schematic view of the B direction of Figure 1 DETAILED DESCRIPTION

[0023] As shown in the figure, an automatic hollow bolt conveying and detecting device comprises a rack 1, a straight vibrator 2 fixed on the rack 1, a conveying track 3 arranged on the upper end surface of the straight vibrator 2, a bolt picking device and a first cylinder 4. Figures 1 to 3 The straight vibrator 2 is installed on the upper end surface of the rack 1 through screws, the conveying track 3 is two parallel support plates 11 fixedly connected on the upper end surface of the straight vibrator 2 through screws, a groove is formed between the two support plates 11, the width of the groove is greater than the diameter of the bolt rod and less than the diameter of the bolt head, the hollow bolt is kept upright when conveying, the support plates 11 are used for supporting the bolt head of the hollow bolt, and the bolt rod of the hollow bolt is deeply inserted into the groove between the two support plates 11 downward; the conveying track 3 comprises an inlet section 12, a connecting section 14 and a conveying section 21, the inlet section 12 and the conveying section 21 are both horizontally arranged and connected through the inclined connecting section 14, the height of the inlet section 12 is higher than that of the conveying section 21, and the free end of the inlet section 12 is used for connecting the discharge port of the vibrator; one side of the conveying track 3 is provided with a sensor support, a counting sensor 16 for counting the number of hollow bolts conveyed by the conveying track 3 is arranged on the sensor support, the counting sensor 16 is an optical sensor, a protective cover plate 9 is arranged above the conveying section 21, the protective cover plate 9 can prevent foreign matters from entering the conveying belt and constrain the hollow bolt, so that the hollow bolt is prevented from separating from the conveying belt during the conveying process;

[0024]

[0025] ​​​A hollow bolt hole detection device is arranged on the rack 1 and located between the conveying rail 3 and the bolt clamping device, the hollow bolt hole detection device comprises a lifting support 6 and a displacement sensor 5, the displacement sensor 5 is installed on the bent arm at the upper end of the lifting support 6, the lower end of the lifting support 6 is fixedly connected to the piston rod extending upward of the second air cylinder 7, the second air cylinder 7 is installed on the rack 1 and used to drive the lifting support 6 to move up and down, and drives the measuring shaft 8 of the displacement sensor 5 to move up and down, which is used to detect the hole diameter of the hollow bolt conveyed on the conveying rail 3; when the measuring shaft 8 of the displacement sensor 5 moves up and down, if the measuring shaft 8 cannot extend into the inner hole of the hollow bolt, the displacement sensor 5 will sense the displacement change, so as to identify that the inner hole diameter of the hollow bolt is too small and does not meet the design standard.

[0026] The bolt picking device comprises a gripper support 10 and a pneumatic clamping jaw 13, the gripper support 10 is slidingly fitted on the rack 1 to move horizontally, the piston rod of the first air cylinder 4 is fixedly connected to the gripper support 10, the pneumatic clamping jaw 13 is fixed on the gripper support 10, the upper end of the pneumatic clamping jaw 13 is provided with a support plate for supporting the bolt head of the hollow bolt, the support plate extends to a limiting plate towards the conveying rail 3 side, the limiting plate is used to abut against the bolt head of the hollow bolt, limit the axial movement of the hollow bolt on the conveying rail 3, and make the hollow bolt conveyed by the bolt picking device be clamped by the pneumatic clamping jaw 13 in the same posture and angle.

[0027] The bolt picking device is used to send the qualified hollow bolt to a predetermined position or reject the unqualified hollow bolt into the waste box 17 provided on the rack 1, the waste box 17 is located below the bolt clamping device, a detection device 15 is provided on one side of the bolt picking device corresponding to the pneumatic clamping jaw 13, which is used to detect whether the pneumatic clamping jaw 13 clamps the hollow bolt, the detection device 15 is an optical sensor.

[0028] The rack 1 is provided with an air path control valve 18, a communication device 19 and a controller 20; the air path control valve 18 is connected with the air path of the first air cylinder 4, the second air cylinder 7 and the pneumatic clamping jaw 13, and is electrically connected with the controller 20; the controller 20 is also electrically connected with the counting sensor 16, the detection device 15 and the communication device 19; the communication device 19 is used to communicate with the robot and the production line controller.

[0029] The utility model discloses a hollow bolt picking device, which comprises a hollow bolt conveying device, a hollow bolt picking device and a hollow bolt detection device.

[0030] Of course, we can also first picking the hollow bolt of the inner hole diameter greater than the design standard, the subsequent displacement sensor 5 measuring shaft 8 can enter the hollow bolt hole of the hollow bolt.

[0031] The above only for the preferred embodiment of the utility model, and not for limiting the utility model, the person skilled in the art is not departing from the spirit of the utility model under the premise of the utility model is changed, all fall into the protection scope of the utility model.

Claims

1. An automatic conveying and testing device for hollow bolts, comprising a frame (1), a vibrator (2) fixed on the frame (1), a conveying rail (3) provided on the upper end face of the vibrator (2), a bolt picking device, and a first cylinder (4), characterized in that: A hollow bolt inner hole detection device is set on the frame (1) and located between the conveying rail (3) and the bolt clamping device. The hollow bolt inner hole detection device includes a lifting bracket (6) and a displacement sensor (5). The displacement sensor (5) is installed on the bending arm at the upper end of the lifting bracket (6). The lower end of the lifting bracket (6) is connected and fixed to the piston rod extending upward from the second cylinder (7). The second cylinder (7) is installed on the frame (1) and is used to drive the lifting bracket (6) to move up and down, and drive the measuring shaft (8) of the displacement sensor (5) to move up and down, for detecting the inner hole diameter of the hollow bolts conveyed on the conveying rail (3). The bolt picking device is driven by the first cylinder (4) to send qualified hollow bolts to a predetermined position or to remove unqualified hollow bolts.

2. The automatic conveying and testing device for hollow bolts as described in claim 1, characterized in that: The bolt picking device includes a clamp bracket (10) and a pneumatic gripper (13). The clamp bracket (10) is slidably fitted on the frame (1) and moves horizontally. The piston rod of the first cylinder (4) is fixedly connected to the clamp bracket (10). The pneumatic gripper (13) is fixed on the clamp bracket (10) and is used to send qualified hollow bolts to a predetermined position.

3. The automatic conveying and testing device for hollow bolts as described in claim 2, characterized in that: A detection device (15) is installed on the bolt picking device, corresponding to the pneumatic gripper (13), to detect whether the pneumatic gripper (13) is holding a hollow bolt.

4. The automatic conveying and testing device for hollow bolts as described in claim 3, characterized in that: The detection device (15) is a photoelectric sensor.

5. The automatic conveying and testing device for hollow bolts as described in claim 1, characterized in that: A counting sensor (16) for counting the number of hollow bolts conveyed by the conveying rail (3) is provided on one side of the conveying rail (3).

6. The automatic conveying and testing device for hollow bolts as described in claim 1, characterized in that: The frame (1) is provided with a waste box (17), which is located below the bolt clamping device.

7. The automatic conveying and testing device for hollow bolts as described in claim 1, characterized in that: The frame (1) is equipped with an air circuit control valve (18), a communication device (19) and a controller (20).

8. The automatic conveying and testing device for hollow bolts as described in claim 1, characterized in that: The conveying rail (3) consists of two parallel support plates (11), with a channel formed between the two support plates (11). The width of the channel is greater than the diameter of the bolt rod and less than the diameter of the bolt head.

9. The automatic conveying and testing device for hollow bolts as described in claim 1, characterized in that: The conveying rail (3) includes an inlet section (12), a connecting section (14), and a conveying section (21). The inlet section (12) and the conveying section (21) are both horizontally arranged and connected by the inclined connecting section (14). The height of the inlet section (12) is higher than the height of the conveying section (21).

10. The automatic conveying and testing device for hollow bolts as described in claim 9, characterized in that: A protective cover plate (9) is provided above the conveying section (21).

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