Sucking structure for screw locking device and screw locking device

Abstract

The utility model belongs to the technical field of screw locking, and particularly relates to a suction structure for a screw locking device and the screw locking device, the suction structure comprises a body, an air channel used for being connected with a vacuum machine is arranged in the body along the length direction of the body, and an elastic limiting piece is arranged at one end of the body close to a screw. The inner diameter of the elastic limiting piece is matched with the diameter of the screw head; a first limiting step used for limiting the screw head is arranged in the elastic limiting piece. According to the suction structure, the elastic limiting piece is arranged in the suction structure, when the screw head is sucked into the air channel, elasticity of the elastic limiting piece is used for exerting force on the side wall of the screw head to stabilize the screw head when the screw head is sucked, and even if the screw head generates tolerance due to production, the screw head cannot be damaged. The air channel can be covered by the elastic threshold range of the rubber, so that the sealing performance of the air channel is improved, the adsorption force is increased, the screw does not shake, the positioning is accurate, the phenomenon of screw loosening is avoided, and the percent of pass of screw head locking is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw locking, and in particular relates to a suction structure for a screw locking device and a screw locking device. Background Art

[0002] Screw locking is an important assembly process used to fasten screws to parts or products. Screw fastening is a key step in many products and directly affects the quality, performance and reliability of the product. In many industries, such as automobile manufacturing, machinery manufacturing, electronic equipment, etc., screw fastening is a key process link.

[0003] There are both manual and automatic screw locking methods. Manual locking is time-consuming and inefficient. Automatic locking generally uses vacuum to absorb the screw head and then moves it to the corresponding position for locking. Since the shape of the screw and the thread size have a certain tolerance range, the suction mechanism for sucking the screw cannot match the size of each screw head well, resulting in the screw shaking relative to the suction mechanism during the movement process after being sucked, which will reduce the suction force. When the screwdriver head is locking the screw, the screw may be crooked relative to the suction mechanism, which will cause the movement angle of the screw thread rail outside the screw to change, and the screw and the threaded hole thread rails are staggered to produce slippage, making the screw locking unqualified. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of the utility model is to provide a suction structure and a screw locking device for a screw locking device, which are used to solve the problems in the prior art that after the screw is sucked and moved, the screw shakes in the suction mechanism, resulting in weak adsorption force and the screw may be crooked during locking, and the screw and the threaded hole have slippage.

[0005] In order to achieve the above-mentioned purpose and other related purposes, on the one hand, the utility model provides a suction structure for a screw locking device, including a main body, wherein an air duct for connecting to a vacuum machine is provided inside the main body along its length direction, and an elastic limiter is installed at one end of the main body near the screw, and the inner diameter of the elastic limiter matches the diameter of the screw head; and a first limit step for limiting the screw head is provided inside the elastic limiter.

[0006] Furthermore, the elastic limiting member is interference fit with the main body.

[0007] Furthermore, a second limiting step for limiting the elastic limiting member is provided on one side of the main body close to the elastic limiting member.

[0008] Furthermore, the second limiting step is provided with a plurality of second ventilation holes along the direction of the airway.

[0009] Furthermore, the elastic limiting member is provided with a first ventilation hole at a position corresponding to the second ventilation hole.

[0010] Furthermore, a side of the first limiting step close to the screw head is wedge-shaped, and an inner diameter of the wedge gradually decreases from a side away from the first limiting step to a side close to the first limiting step.

[0011] Furthermore, a third limiting step is provided in the body, and a plurality of third ventilation holes are provided on the third limiting step along the length direction of the body.

[0012] Furthermore, a connecting groove is provided on a side of the main body away from the elastic limiting member, and an annular groove is provided in the connecting groove, and the annular groove is used for installing a sealing ring.

[0013] Furthermore, a positioning ring for limiting position is provided on the outer wall of the main body; an air hole is also provided on the main body, one end of the air hole is connected to the airway, and the other end of the air hole is used to communicate with the vacuum machine.

[0014] On the other hand, the present application also provides a screw locking device, comprising the above-mentioned suction structure, and further comprising:

[0015] A screwdriver head, one end of which is located in the airway and the other end of which is located outside the airway, the screwdriver head being used for tightening a screw;

[0016] A first driving member, used for driving the screwdriver head to rotate;

[0017] The second driving member is used to drive the screwdriver head to move up and down.

[0018] As described above, the utility model has the following beneficial effects: the present application arranges an elastic limiter in the suction structure, so even if the size of the screw head has a certain tolerance, when the screw head is adsorbed in the airway, the circumference of the screw head is in contact with the elastic limiter, and when the screw head is adsorbed, the elasticity of the elastic limiter is used to apply force to the side wall of the screw head to stabilize the screw head, and even if the screw head has a tolerance due to production, it can be covered by the elastic threshold range of the rubber, directly increasing the strong sealing index force value, thereby increasing the sealing of the airway, increasing the adsorption force, and at the same time the screw will not shake, and the positioning can be accurate when locking, and the thread slippage will not occur, thereby improving the qualified rate of screw head locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the suction structure provided by the utility model;

[0020] Figure 2 for Figure 1 Sectional view of AA in the middle;

[0021] Figure 3 for Figure 1 Cross-sectional view of the middle BB;

[0022] Figure 4 for Figure 2 Enlarged view of middle C;

[0023] Figure 5 It is a structural schematic diagram of an elastic limiting member;

[0024] Figure 6 is a cross-sectional view of the elastic limiting member;

[0025] Figure 7 It is a structural schematic diagram of the screw locking device.

[0026] Part Number Description

[0027] 1-main body, 101-air passage, 102-second limiting step, 103-second vent, 104-third limiting step, 105-third vent, 106-connecting groove, 107-annular groove, 108-positioning ring, 109-air hole, 2-elastic limiting member, 201-first limiting step, 202-first vent, 3-first driving member, 4-second driving member, 5-screwdriver head. DETAILED DESCRIPTION

[0028] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0029] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0030] In order to describe the present invention in detail, first, the suction structure and the locking device for the screw locking device provided by the present invention are specifically described below.

[0031] like Figures 1 to 6As shown, the present application provides a suction structure for a screw locking device, including a main body 1, in which an air channel 101 for connecting to a vacuum machine is provided along its length direction, and both ends of the air channel 101 are open.

[0032] An elastic limiting member 2 is installed at the bottom of the airway 101 , and a connecting groove 106 is provided at the top of the airway 101 . The inner diameter of the connecting groove 106 is larger than the inner diameter of the airway 101 .

[0033] An annular groove 107 is provided on the inner wall of the connecting groove 106 near the top. One end of the screwdriver head 5 is located in the airway 101, and the other end is located outside the airway 101. A sealing ring is installed in the annular groove 107, so that when the screwdriver head 5 moves up and down, the sealing performance in the airway 101 is relatively good, and the adsorption force on the screw head is not affected.

[0034] An air hole 109 is provided on the main body 1, one end of the air hole 109 is connected to the air channel 101, and the other end of the air hole 109 is used to connect with a vacuum machine. When adsorption is required, vacuum treatment can be performed through the air hole 109. When the screw is locked, a little air can be blown into the air channel 101 through the air hole 109, so that the screw head can be smoothly separated from the elastic limiter 2.

[0035] The airway 101 can be designed to be circular or in other shapes. In this embodiment, the airway 101 is designed to be circular, the inner diameter of the elastic stopper 2 matches the diameter of the screw head, and the outer diameter of the elastic stopper 2 matches the inner diameter of the airway 101. The elastic stopper 2 in this embodiment is made of rubber.

[0036] A first limiting step 201 for limiting the screw head is provided in the elastic limiting member 2. When the screw head is sucked, the screw head moves upward along the airway 101 under the action of vacuum suction. When the screw head reaches the first limiting step 201, it is blocked by the first limiting step 201 and cannot move further.

[0037] In order to allow the first limiting step 201 to better limit the screw head, the side of the first limiting step 201 close to the screw head is wedge-shaped, and the inner diameter of the wedge gradually decreases from the side away from the first limiting step 201 to the side close to the first limiting step 201. Some screw heads have chamfered edges, so an inclined surface is provided at the corresponding first limiting step 201, so that the screw head can be better adsorbed.

[0038] In this embodiment, the elastic limiter 2 is connected to the body 1 by interference fit, so that the elastic limiter 2 is installed in the body 1, and the elastic limiter 2 is not easy to fall off from the body 1. Of course, a protrusion for limiting can also be provided on the inner wall of the body 1, and an extended edge can be provided on the outer periphery of the elastic limiter 2, and the extended edge is located on the upper part of the protrusion.

[0039] In detail, the elastic limiter 2 is detachable from the main body 1. For screw heads of different sizes, elastic limiters 2 of different thicknesses can be used. The elastic limiter 2 is placed in the main body 1. A second limiter step 102 is provided in the main body 1. The second limiter step 102 is used to limit the elastic limiter 2 to prevent the elastic limiter 2 from entering the airway 101 too much or too little.

[0040] A plurality of second vent holes 103 are arranged in the circumference of the second limiting step 102. The second vent holes 103 are arranged along the direction of the airway 101. In the present embodiment, the second vent holes 103 are semicircular. When the screwdriver head 5 is moving, even if the outer diameter of the screwdriver head 5 is the same as the aperture of the second limiting step 102, the gas will flow through the second vent holes 103, so that the screw head can be better adsorbed.

[0041] When the top of the screw head contacts the elastic stopper 2, it indicates that the screw head has been adsorbed in place. After the screw head moves to the position where it needs to be locked, the screwdriver head 5 in the airway 101 drops to lock the screw. During the locking process, the screwdriver head 5 passes through the second limit step 102 and the first limit step 201. If the outer diameter of the screwdriver head 5 is similar to the inner diameter of the second limit step 102 and the first limit step 201, the adsorption force of the screw head will be weakened before the screwdriver head 5 contacts the screw head, and the screw head will fall off. In order to prevent this from happening, a first vent hole 202 is provided on the first limit step 201. The position of the first vent hole 202 is preferably corresponding to the second vent hole 103, so that the gas flow is convenient and there will be no turbulence during the flow.

[0042] The screwdriver head 5 moves along the direction of the airway 101 to lock the screw head. In order to better limit and stabilize the screwdriver head 5 and prevent the screwdriver head 5 from tilting, a third limiting step 104 is further provided in the body 1. The third limiting step 104 is spaced apart from the second limiting step 102. The third limiting step 104 is located on the side of the body 1 close to the top. The screwdriver head 5 is fixed by the second limiting step 102 and the third limiting step 104.

[0043] The third limiting step 104 is provided with a plurality of third ventilation holes 105 along the length direction of the main body 1. The third ventilation holes 105 are also semicircular. The positions of the third ventilation holes 105 and the second ventilation holes 103 may not correspond and may be staggered.

[0044] Furthermore, a positioning ring 108 for limiting is provided on the outer wall of the main body 1. When the main body 1 is installed, the positioning ring 108 contacts the mounting portion of the screw locking device, and the positioning ring 108 is fixed at its mounting portion to achieve installation, fixing and positioning.

[0045] On the other hand, Figure 7 As shown, the present application also provides a screw locking device, including the above-mentioned suction structure, and further comprising:

[0046] The screwdriver head 5 has one end located in the airway 101 and the other end located outside the airway 101 . The screwdriver head 5 is used to tighten the screw. According to different types of screw heads, screwdriver heads 5 with different shapes and patterns can be replaced.

[0047] The first driving member 3 is used to drive the screwdriver head 5 to rotate; the first driving member 3 is generally a motor, and the screwdriver head 5 is connected to the output end of the motor. The screwdriver head 5 rotates through the rotation of the motor to tighten the screw head.

[0048] The second driving member 4 is used to drive the screwdriver head 5 to move up and down. This embodiment uses a cylinder, and the movable section of the cylinder is installed with a mounting plate. The first driving member 3 is installed on the mounting plate. The second driving member 4 drives the first driving member and the screwdriver head 5 to move along the direction of the airway 101.

[0049] A camera and a controller may also be installed on the screw locking device. The controller directly controls the vacuum machine, the first driving member 3 and the second driving member 4. The camera is used to detect the locking condition and transmit it to the controller, which then determines whether the locking is qualified.

[0050] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A suction structure for a screw locking device, characterized in that: The invention comprises a main body (1), wherein an air passage (101) for connecting to a vacuum machine is provided inside the main body (1) along its length direction; an elastic stopper (2) is installed at one end of the main body (1) close to a screw head; the inner diameter of the elastic stopper (2) matches the diameter of the screw head; and a first stopper step (201) for stopping the screw head is provided inside the elastic stopper (2).

2. The suction structure for a screw locking device according to claim 1, characterized in that: The elastic limiting component (2) is interference fit with the main body (1).

3. The suction structure for a screw locking device according to claim 1, characterized in that: A second limiting step (102) for limiting the elastic limiting member (2) is provided on a side of the body (1) close to the elastic limiting member (2).

4. The suction structure for a screw locking device according to claim 3, characterized in that: The second limiting step (102) is provided with a plurality of second ventilation holes (103) along the direction of the airway (101).

5. The suction structure for a screw locking device according to claim 4, characterized in that: The elastic limiting component (2) is provided with a first ventilation hole (202) at a position corresponding to the second ventilation hole (103).

6. The suction structure for a screw locking device according to claim 1, characterized in that: The side of the first limiting step (201) close to the screw head is wedge-shaped, and the inner diameter of the wedge gradually decreases from the side away from the first limiting step (201) to the side close to the first limiting step (201).

7. The suction structure for a screw locking device according to claim 2, characterized in that: A third limiting step (104) is also provided in the body (1), and a plurality of third ventilation holes (105) are provided on the third limiting step (104) along the length direction of the body (1).

8. The suction structure for a screw locking device according to any one of claims 1 to 7, characterized in that: A connecting groove (106) is provided on a side of the body (1) away from the elastic limiting member (2), and an annular groove (107) is provided inside the connecting groove (106). The annular groove (107) is used for installing a sealing ring.

9. The suction structure for a screw locking device according to claim 8, characterized in that: The outer wall of the body (1) is provided with a positioning ring (108) for limiting position; the body (1) is also provided with an air hole (109), one end of the air hole (109) is connected to the air channel (101), and the other end of the air hole (109) is used to communicate with a vacuum machine.

10. A screw locking device, characterized in that: The suction structure according to any one of claims 1 to 9 further comprises: a screwdriver head, one end of which is located inside the airway (101) and the other end of which is located outside the airway (101), the screwdriver head being a screwdriver head for tightening a screw; A first driving member (3) for driving the screwdriver head to rotate; The second driving member (4) is used to drive the screwdriver head to move up and down.

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