Magnetic sleeve

Abstract

The utility model discloses a magnetic sleeve which comprises a second sleeve, and the second sleeve is sleeved on the outer side of a bolt bit and keeps sliding relative to the bolt bit. And the magnet is annular and is integrally fixed at the end part of the second sleeve, and when the second sleeve slides relative to the bolt bit, the head part of the bolt bit penetrates through or is separated from the magnet. The magnetic sleeve can be used in cooperation with a tightening device, the head of a bolt is attracted through the magnet to fix the bolt, so that automatic picking of the bolt is achieved, the magnet is annular and can guide the bolt and prevent the bolt from deviating from the vertical direction, and the magnetic sleeve is free of any external energy and other mechanism assistance, simple in structure, small in occupied space and convenient to use. The maintenance cost is low, and the problem of function failure caused by blockage of an adsorption channel when the bolt is picked up through traditional vacuum adsorption and energy consumption are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of spare parts assembly, especially relates to a magnetic sleeve. BACKGROUND

[0002] Traditional screw suction mechanism generally adopts vacuum adsorption principle to realize the pickup and transfer of screw. The technical scheme generates negative pressure through vacuum generator, and forms adsorption force at the front end of the sleeve by using air pressure difference. However, when the surface of the screw to be sucked has oil stains, metal debris or oxidized slag, the slag will be sucked into the pipeline at the same time when the screw is sucked, which can easily cause adsorption channel blockage, increase the pickup failure rate, and affect the efficiency of automatic assembly. In addition, the vacuum generating device, the matched electromagnetic valve, the filter and other pneumatic components have high purchase cost, and professional personnel is needed for system maintenance. In addition, a complex air pipe circuit needs to be arranged around the sleeve, which increases the size of the mechanism and affects the working space. The exposed pipeline system also has mechanical interference risk, which affects the overall coordination of the equipment appearance. SUMMARY

[0003] Therefore, in order to solve the above problems, the utility model provides a magnetic sleeve, which comprises:

[0004] A second sleeve is sleeved on the outside of the bolt head and keeps relative sliding with the bolt head.

[0005] A magnet is annular and fixed on the end of the second sleeve. When the second sleeve slides relative to the bolt head, the head of the bolt passes through or separates from the magnet.

[0006] The utility model can be used with a tightening device. The bolt head is adsorbed by the magnet to fix the bolt, so that the automatic pickup of the bolt is realized. Since the magnet is annular, the bolt can be guided and the bolt can not deviate from the vertical direction. Then the moving device puts the assembly hole of the corresponding part of the bolt into the press, so that the tail part of the bolt enters the assembly hole. Since the second sleeve cannot move downward due to the contact with the surface of the part, the bolt head can continue to move downward and contact the bolt, and then the bolt is ejected by the continuous movement, so that the bolt and the magnetic sleeve are separated. The bolt is tightened by the rotation of the bolt head driven by the tightening device. The magnetic sleeve does not need any external energy and other auxiliary mechanisms, has simple structure, small space occupation and low maintenance cost, avoids the problem of functional failure caused by the blockage of the adsorption channel when the traditional vacuum adsorption picks up the bolt, and saves energy.

[0007] Further, the second sleeve comprises a matching part and a magnet mounting part. The matching part is in sliding cooperation with the bolt head. The magnet mounting part has a limiting hole for receiving the bolt head. The magnet is fixed in the limiting hole.

[0008] The movement of the bolt head is limited by the limiting hole, the screw inclination or adsorption misplacement caused by magnetic force deviation is reduced, and the alignment accuracy and stability are improved.

[0009] Further, the magnetic suction sleeve further comprises a spacer sleeve, the spacer sleeve is sleeved outside the magnet, and the magnet is in interference fit with the limiting hole through the spacer sleeve.

[0010] Easy to install, and the magnet can be disassembled by disassembling the spacer sleeve, so that the magnet can be replaced.

[0011] Further, the magnetic suction sleeve further comprises a first sleeve, the first sleeve has a fixed hole matched with the bolt head and a movable hole matched with the matching part, the bolt head is inserted into the fixed hole and the movable hole and is fixed with the first sleeve, and the matching part is inserted into the movable hole and slides relative to the first sleeve.

[0012] Further, an elastic member is arranged between the end face of the movable hole and the end face of the matching part away from the magnet mounting part.

[0013] The force contacting the product is buffered through the expansion and contraction of the elastic member, and hard collision of the device and the product is prevented.

[0014] Further, the magnetic suction sleeve further comprises a fixing pin, the fixing pin is sequentially inserted into the first sleeve and the bolt head in a direction perpendicular to the axis of the bolt head, so that the bolt head and the first sleeve are fixed.

[0015] The fixing pin is transversely inserted into the first sleeve and the bolt head in a direction perpendicular to the axis of the bolt head, a rigid mechanical connection is formed, the circumferential shear force when the bolt head rotates is directly resisted, the risk of torque attenuation or slipping caused by vibration of the traditional axial clamping is reduced, and the torque transmission stability under high load working conditions is improved.

[0016] Further, a waist-shaped hole is formed in the outer circumferential surface of the first sleeve and is in communication with the movable hole, a connecting pin is arranged on the circumferential surface of the matching part of the second sleeve, and the end of the connecting pin is slidingly fitted in the waist-shaped hole.

[0017] The movement path of the connecting pin is restricted through the waist-shaped hole, so that the linear sliding of the second sleeve along the sleeve axis is limited, the risk of circumferential deflection is reduced, the magnet and the head of the bolt head are always aligned, and the deep hole screw adsorption success rate is improved. Meanwhile, the two ends of the waist-shaped hole form a physical stop for the sliding of the second sleeve, the second sleeve is prevented from being pulled out due to misoperation, and the operation reliability of the mechanism is ensured.

[0018] The utility model has the advantages of:

[0019] The utility model discloses a cooperation with tightening device can be used, through magnet adsorption bolt head, to the bolt is fixed to realize the automatic pickup of bolt, because magnet is annular, can guide right the bolt, avoid the bolt deviation vertical direction, then the assembly hole of mobile device will bolt corresponding spare part is put into the depression, to make bolt tail part enter the assembly hole, continue to depress, because the second sleeve and spare part surface contact and can not continue to move downward, but bolt batch head and the second sleeve keep relative sliding, therefore bolt batch head will continue to move downward, first contact with bolt, then continue to move and eject bolt, thereby realize the separation of bolt and magnetic sleeve, and the tightening device drives batch head to rotate again, and the bolt is tightened, and this magnetic sleeve does not have any external energy and other mechanism auxiliary, simple structure, small space occupation, low maintenance cost, avoid the problem of traditional vacuum adsorption pickup bolt adsorption channel blockage and energy consumption caused by function failure fault. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structural diagram of magnetic sleeve;

[0021] Figure 2 It is Figure 1 The cross section of the magnetic sleeve shown in the drawing;

[0022] Figure 3 It is Figure 1 The schematic diagram of the magnetic sleeve shown in the drawing picks up bolt;

[0023] Figure 4 It is Figure 1 The schematic diagram of the magnetic sleeve shown in the drawing tightens bolt;

[0024] In the drawing:

[0025] 10, bolt batch head;11, head;

[0026] 20, first sleeve;21, waist type hole;22, movable hole;23, fixed hole;

[0027] 30, second sleeve;31, magnet mounting portion;32, cooperation portion;33, limiting hole;

[0028] 40, fixed pin;

[0029] 50, connecting pin;

[0030] 60, spacer;

[0031] 70, magnet;

[0032] 80, elastic piece;

[0033] 90, bolt. DETAILED DESCRIPTION

[0034] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein like or similar elements are denoted by like or similar reference symbols throughout the drawings. The embodiments described below are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0035] In this document, relational terms such as first and second, and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] As described in the background, when the surface of the screw to be sucked has oil stains, metal debris or oxidized dregs, these dregs will be sucked into the pipeline at the same time when the screw is sucked, which is easy to cause the blockage of the adsorption channel, resulting in an increase in the pickup failure rate and affecting the efficiency of automatic assembly. In addition, the vacuum generating device and the supporting electromagnetic valve, filter and other pneumatic components have high purchase cost, and professional personnel is required for system maintenance. In addition, a complex air pipe circuit needs to be arranged around the sleeve, which increases the size of the mechanism and affects the working space. The exposed pipeline system also has the risk of mechanical interference, affecting the overall coordination of the appearance of the equipment.

[0037] Embodiment 1:

[0038] Therefore, in order to solve the above technical problems existing in the prior art, the embodiment provides a magnetic sleeve, as shown in Figure 1 、 2 , comprising:

[0039] The second sleeve 30 is sleeved on the outside of the bolt head and keeps relative sliding with the bolt head.

[0040] The magnet 70 is annular and is fixed as a whole at the end of the second sleeve. When the second sleeve slides relative to the bolt head, the head of the bolt head passes through or leaves the magnet.

[0041] Specifically, the magnetic sleeve in the embodiment can be used in cooperation with the tightening device, the bolt head can be connected with the tightening device, the magnetic sleeve is rotated by the tightening device, in use, the magnetic sleeve described in the embodiment is moved to the bolt access area, the bolt head is adsorbed by the magnet to fix the bolt, so that the automatic picking of the bolt is realized, since the magnet is annular, the bolt can be guided, and the bolt is prevented from deviating from the vertical direction, then the moving device is used to put the assembly hole of the corresponding part of the bolt into the depression, so that the tail part of the bolt enters the assembly hole, and the second sleeve cannot continue to move downward due to the contact with the surface of the part, but the bolt head continues to move downward, and then the bolt is ejected, so that the bolt and the magnetic sleeve are separated, the tightening device rotates the head to tighten the bolt, the magnetic sleeve does not need any external energy and other mechanisms to assist, the structure is simple, the space occupation is small, the maintenance cost is low, the problem of function failure caused by the blockage of the adsorption channel when the traditional vacuum adsorption picks the bolt is avoided, and energy consumption is reduced.

[0042] As shown in Figure 2 , the second sleeve can include a fitting part 32 and a magnet mounting part 31, the fitting part is in sliding cooperation with the bolt head, and the magnet mounting part has a limiting hole 33 for receiving the bolt head, and the magnet is fixed in the limiting hole.

[0043] The movement of the bolt head is limited by the limiting hole in the embodiment, so that the inclination or adsorption misalignment of the screw caused by the magnetic force deviation is reduced, and the alignment accuracy and stability are improved.

[0044] In use, as shown in Figure 3 , the bolt head is adsorbed in the limiting hole under the adsorption action of the magnet, the movement of the bolt is limited by the limiting hole, the bolt is prevented from deviating from the vertical direction, and when reaching the specified tightening point, as shown in Figure 4 , the product is touched, and the whole is subjected to an upward force, the second sleeve stops moving under the stopping action of the product, the bolt head continues to contact the screw, and the tightening tool rotates the head to tighten the screw. At this time, the mechanism goes up and is separated from the product surface.

[0045] As shown in Figure 2 , the magnetic sleeve can further include a spacer 60, the spacer is sleeved outside the magnet, and the magnet is in interference fit with the limiting hole through the spacer.

[0046] The embodiment can isolate the mechanical stress generated by the collision between the head and the sleeve during the tightening operation from being directly transmitted to the brittle magnet, avoid the cracking or magnetic attenuation of the magnet, and compensate for the machining tolerance between the outer diameter of the magnet and the hole diameter of the sleeve by adjusting the wall thickness or material hardness (such as a deformable layer of copper alloy) of the spacer sleeve, so as to realize the rapid adaptation of spare parts across batches, and reduce the cost of precision machining. In addition, the magnet can be pulled out of the sleeve by pulling out the spacer sleeve, which is easy to disassemble. When installing, the spacer sleeve is only needed to be sleeved on the outside of the magnet, and then the whole is inserted into the limiting block, so the installation is convenient.

[0047] As shown in Figure 1 As shown in Figure 2 The first sleeve has a fixed hole 23 matched with the bolt head and a movable hole 22 matched with the matching part, and the bolt head is inserted into the fixed hole and the movable hole to be fixed with the first sleeve, and the matching part is inserted into the movable hole to be relatively slid with the first sleeve.

[0048] As shown in the embodiment, an elastic member 80 is arranged between the end face of the movable hole and the end face of the matching part away from the magnet mounting part.

[0049] The elastic member itself can be stretched or contracted to buffer the force of contact with the product, preventing the device from hard collision with the product.

[0050] In the embodiment, the elastic member can be a spring, and the spring is sleeved on the bolt head. When touching the product, the magnetic sleeve as a whole is subjected to an upward force, the second sleeve is contracted upward within the elastic deformation range of the spring, the bolt head contacts the screw downward, and the tightening tool rotates the head to tighten the screw. At this time, the mechanism goes up and is separated from the surface of the product, and the spring and the second sleeve are reset, so that the magnet can re-adsorb the screw.

[0051] As shown in the embodiment, the magnetic sleeve further comprises a fixing pin 40, which is arranged in a direction perpendicular to the axis of the bolt head and sequentially passes through the first sleeve and the bolt head from outside to inside, so that the bolt head and the first sleeve are fixed.

[0052] The fixing pin is transversely arranged through the first sleeve and the bolt head perpendicular to the axis of the bolt head, forming a rigid mechanical connection, directly resisting the circumferential shear force when the bolt head rotates, reducing the risk of torque attenuation or slipping caused by vibration of the traditional axial clamping (such as threaded locking), and improving the stability of torque transmission under high load working conditions.

[0053] As shown in the embodiment, the first sleeve further has a waist hole communicated with the movable hole, and a connecting pin is arranged on the peripheral surface of the matching part of the second sleeve, and the end of the connecting pin is slidably fitted in the waist hole.

[0054] The movement path of the connecting pin is restricted through the waist-shaped hole, so as to limit the linear sliding of the second sleeve along the sleeve axis direction, reduce the risk of circumferential deflection, ensure that the magnet is always aligned with the head of the chuck, and improve the success rate of deep hole screw adsorption.

[0055] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic sleeve, characterized in that, The application relates to a magnetic attraction sleeve for a bolt head, comprising: a second sleeve sleeved outside the bolt head and kept in relative sliding with the bolt head; a magnet in a ring shape and fixed at the end of the second sleeve, and when the second sleeve slides relative to the bolt head, the head of the bolt head passes through or leaves the magnet.

2. A magnetic sleeve according to claim 1, wherein, The second sleeve comprises a matching part and a magnet mounting part, the matching part is matched with the bolt head in sliding mode, and the magnet mounting part is internally provided with a limiting hole for receiving the head of the bolt, and the magnet is fixed in the limiting hole.

3. A magnetic sleeve according to claim 2, wherein, The magnetic attraction sleeve further comprises a spacer sleeve sleeved outside the magnet, and the magnet is in interference fit with the limiting hole through the spacer sleeve.

4. The magnetic sleeve of claim 2, wherein, The magnetic attraction sleeve further comprises a first sleeve provided with a fixed hole matched with the bolt head and a movable hole matched with the matching part, the bolt head is inserted into the fixed hole and the movable hole and kept fixed with the first sleeve, and the matching part is inserted into the movable hole and kept in relative sliding with the first sleeve.

5. A magnetic sleeve according to claim 4, wherein, An elastic member is arranged between the end face of the movable hole and the end face of the matching part away from the magnet mounting part.

6. A magnetic sleeve according to claim 4, wherein, The magnetic attraction sleeve further comprises a fixing pin sequentially penetrating the first sleeve and the bolt head in a direction perpendicular to the axis of the bolt head, so that the bolt head is kept fixed with the first sleeve.

7. A magnetic sleeve according to claim 4, wherein, The outer circumferential surface of the first sleeve is further provided with a waist-shaped hole communicated with the movable hole, and the circumferential surface of the matching part of the second sleeve is provided with a connecting pin, and the end of the connecting pin is in sliding fit in the waist-shaped hole.

Images