Automatic assembly equipment for bolt and rubber sleeve

Abstract

The present invention discloses an automatic assembly device for bolt and rubber sleeves, which relates to the technical field of bolt and rubber sleeve assembly, including a first turntable and a second turntable, wherein the outer diameter edges of the first turntable and the second turntable are respectively provided with holes for bearing bolts and rubber sleeves, and an expansion frame is provided between the corresponding hole positions of the first turntable and the second turntable, and the expansion frame is mounted on the mounting frame. The expansion frame is composed of a guide sliding part, an expansion frame, an elastic part and a hook, and a limit block is provided directly above the bolt, and the limit block abuts against the end of the bolt after the rubber sleeve and the bolt move up synchronously, so that the rubber sleeve and the bolt move relative to each other and are inserted. This automatic assembly device for bolt and rubber sleeves, by providing an expansion frame between the rubber sleeve and the bolt, maintains the open state of the upper end opening of the rubber sleeve during the process of inserting the rubber sleeve, so that the expansion frame will not rub against the thread or rod of the bolt and roll inward to cause cracks, thereby protecting the rubber sleeve and ensuring its service life.

Description

Technical Field

[0001] The invention relates to the technical field of bolt and rubber sleeve assembly, in particular to automatic assembly equipment for bolt and rubber sleeves. Background Art

[0002] Bolt sleeves, also often called bolt sleeves, bolt protective sleeves, etc., play an important role in mechanical assembly, equipment maintenance and various engineering applications.

[0003] When installing bolt rubber sleeves, two parts are usually responsible for loading the bolt and rubber sleeve respectively, so that the axes of the two separate rubber sleeves and the bolt are collinear and located at two different heights in the vertical direction. The rubber sleeve is located at the lower end of the bolt. After the axes are aligned, the rubber sleeve is pushed up through the hollow cylinder and inserted into the bolt rod. During this process, because the inner diameter of the rubber sleeve must be smaller than the outer diameter of the bolt rod so that the rubber sleeve can stabilize its position, when the inner diameter of the upper end face of the rubber sleeve is connected with the end of the screw rod, the inner edge of the upper end face of the rubber sleeve will be compressed downward (turned inward), which is easy to cause small cracks on the upper edge of the rubber sleeve. Although it will not break in the short term, such cracks will affect the service life of the rubber sleeve, causing the rubber sleeve to spread from the crack during use, thereby causing premature damage to the rubber sleeve. To this end, we propose an automatic assembly device for bolt rubber sleeves. Summary of the Invention

[0004] The object of the present invention is to provide an automatic assembly device for bolt and rubber sleeves to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic assembly device for bolts and rubber sleeves, comprising a first turntable and a second turntable, wherein the outer diameter edges of the first turntable and the second turntable are respectively provided with holes for bearing bolts and rubber sleeves. When the rotation stops, there is always a rubber sleeve and a corresponding hole position of the bolt on the first turntable and the second turntable, and a sleeve is provided below the corresponding hole positions of the rubber sleeve and the bolt to lift the rubber sleeve and insert it into the bolt. An expansion frame for expanding the upper end portion of the rubber sleeve is provided in the middle of the corresponding hole positions of the first turntable and the second turntable in the vertical direction, and the expansion frame is mounted on the mounting bracket. There are at least three groups of expansion frames and they are distributed around the circumference at the same horizontal height. The expansion frame is composed of a guide slide, an expansion frame, an elastic portion and a hook. The various parts are connected in sequence to form a whole. The guide sliding part is inclined toward the axis of the rubber sleeve in the vertical direction and the lower end is located in the positive direction range of the inner diameter surface of the rubber sleeve. When the guide sliding part contacts the rubber sleeve and the bolt, the expansion part resists the rod of the bolt to keep the guide sliding part in an inclined state and stretch the upper end of the rubber sleeve so that it does not contact the bolt. When the rubber sleeve and the bolt move upward as a whole, the elastic part is compressed and deformed when it touches the hole position and resets when it leaves the hole position. After the expansion frame passes through the hole position, the elastic part resets and the hook contacts the stop rod located above the first turntable. The stop rod causes the bracket to flip over and leave the gap between the rubber sleeve and the bolt. A limit block is provided directly above the bolt. After the rubber sleeve and the bolt move upward synchronously, the limit block resists the end of the bolt, so that the rubber sleeve and the bolt move relative to each other and are inserted.

[0006] Preferably, the hook on the expansion frame is bent toward the guide slide portion, and the hook is located outside the edge of the expansion frame in the width direction of the expansion frame.

[0007] Preferably, a limiting rod is provided on the lower surface of the junction of the expansion part and the elastic part on the expansion frame, and the expansion frame is mounted on the hanging frame through the limiting rod.

[0008] Preferably, the overall proportion of the expansion frame is such that the guide slide portion is inclined in the initial state on the hanger, and the lower end portion of the guide slide portion is located directly above the hollow aperture range of the rubber sleeve.

[0009] Preferably, one end of the blocking rod is hinged to the upper end surface of the first turntable, and when the expansion frame moves upward, the other end of the blocking rod is hung on the hook to cause the expansion frame to flip over.

[0010] Preferably, the outer edge of the limit block is convex and the thickness after the convexity is the same as the thickness of the nut of the bolt. A magnet is set at the convex part of the limit block, and the corresponding expansion frame is partially or entirely set to ferromagnetic metal.

[0011] Preferably, the hanging bracket is a guide rail extending from the first turntable to the second turntable, and one end of the guide rail is located on the forward side of the expansion frame when the expansion frame rotates with the barrier rod. Under the action of the barrier rod and the magnet, the expansion frame is moved and mounted on the guide rail, and slides down along the guide rail to the other end. The other end of the guide rail is the initial state position of the expansion frame.

[0012] Preferably, a wear-resistant surface is provided on the side of the lower end of the sliding guide portion that contacts the bolt.

[0013] Preferably, a guide plate is further provided at the lower convex position of the limit block, and the guide plate is used to trim the angle of the expansion frame after being adsorbed.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention provides an expansion frame between the rubber sleeve and the bolt. The expansion frame keeps the upper end of the rubber sleeve in an open state during the insertion of the rubber sleeve, so that the rubber sleeve will not rub against the thread or rod of the bolt and roll inward to cause cracks, thereby protecting the rubber sleeve and ensuring its service life.

[0016] The guide rail provided between the first turntable and the second turntable of the present invention can automatically guide the expansion frame to the position of the initial state, so that it can be automatically recycled without the need for additional resetting or loading structures, and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the rubber sleeve of the present invention in its initial state;

[0019] Figure 3 for Figure 2 Schematic diagram of the state structure before the state passes through the hole;

[0020] Figure 4 This is a schematic diagram of the structure of the expansion frame after being perforated and starting to flip;

[0021] Figure 5 Schematic diagram of the lateral structure of the expansion frame;

[0022] Figure 6 This is the axonometric drawing of the expansion frame;

[0023] Figure 7 A schematic diagram of a state in which the expansion rack of the present invention is arranged in three groups;

[0024] Figure 8 A schematic diagram of a state in which the expansion racks of the present invention are arranged in four groups;

[0025] Figure 9 It is a schematic diagram of the half-section structure of the end of the barrier rod;

[0026] Figure 10 It is a top view schematic diagram of the contact state between the end of the barrier rod and the hook.

[0027] In the figure: 1. first turntable; 2. second turntable; 3. hole position; 4. sleeve; 5. expansion bracket; 501. guide slide; 502. expansion bracket; 503. elastic portion; 504. hook; 6. hanging bracket; 7. stop rod; 8. limit block; 9. limit rod; 10. guide plate. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1 The present invention provides a technical solution: an automatic assembly device for bolt and rubber sleeves, comprising a first turntable 1 and a second turntable 2 at different heights in the vertical direction, with the first turntable 1 on top, a semi-enclosed hole 3 provided on the edge of the first turntable 1 for mounting bolts, and a retaining frame provided on the outside, one of the multiple hole positions 3 corresponding to a loading position, docking with a vibration plate feeder or other feeder, so that the bolts continuously enter the hole positions 3, and a blanking mechanism provided in one of the empty positions of the first turntable 1 to remove the bolts with rubber sleeves installed, and the second turntable 2 is also provided with a hole 3 for placing the rubber sleeve around it, and a loading and unloading mechanism is also provided. The first turntable 1 and the second turntable 2 rotate indirectly, and the single rotation angle is related to the angular spacing of the hole 3, so that each time the first turntable 1 and the second turntable 2 rotate, the axes of the holes 3 on the two turntables at corresponding positions (the overlapping parts of the two in the vertical direction) are collinear, and a sleeve 4 is further provided directly below the corresponding position, and the sleeve 4 is also coaxial with the hole 3 at this position. A telescopic mechanism is provided under the sleeve 4, such as a reciprocating telescopic mechanism such as a cylinder or an electric push rod.

[0030] The sleeve 4 is driven upward by the telescopic mechanism, and the sleeve 4 lifts up the rubber sleeve located on the hole 3 of the second turntable 2, so that the rubber sleeve moves upward along the axial direction. During the upward movement, the rubber sleeve contacts the bolt and pushes the bolt onto the bolt rod. Then the telescopic mechanism drives the sleeve 4 to reset. After resetting, the first turntable 1 and the second turntable 2 rotate to corresponding angles respectively to perform the next action.

[0031] See Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 9 and Figure 10In the initial state, an expansion frame 5 is provided between the coaxial hole positions 3 of the first turntable 1 and the second turntable 2 (the subsequent description refers to the hole position 3) in the axial position. The expansion frame 5 is inclined at a certain angle, and one end of the expansion frame 5 is located within the axial range of the hollow hole of the rubber sleeve, that is, the lower end of the expansion frame 5 will include the lower end of the expansion frame 5 in the rubber sleeve when the rubber sleeve moves upward. The expansion frame 5 is composed of a guide slide 501, an expansion support portion 502, an elastic portion 503 and a hook 504 connected in sequence. The guide slide 501 is in the shape of a straight plate, and the lower end of the guide slide 501 is located between the rubber sleeve and the bolt. When the rubber sleeve moves upward, the lower end of the guide slide 501 is pushed up by the rubber sleeve, and after being pushed up, the upper surface of the lower end of the guide slide 501 is in contact with the bolt. The rod, that is, the guide slide 501 is clamped by the bolt and the rubber sleeve. The function of the guide slide 501 is to stretch the upper end of the rubber sleeve so that it does not fit the bolt rod. Therefore, it is necessary to set an expansion part 502 to keep the guide slide 501 in an inclined state. The expansion part 502 contacts the side wall of the bolt rod so that the guide slide 501 stretches the upper end of the rubber sleeve. The expansion part 502 protrudes in the thickness direction of the guide slide 501, and the elastic part 503 is used to be compressed and deformed when the expansion frame 5 moves upward and contacts the hole 3 on the first turntable 1, shrinking its maximum transverse diameter so that it can pass through the hole 3, and reset again after passing through. The hook 504 is used to pull out the expansion frame 5 to make it out of the gap between the rubber sleeve and the bolt.

[0032] A blocking rod 7 corresponding to the expansion frame 5 is provided on each of the three holes of the first turntable 1. Preferably, one end of the blocking rod 7 is hinged or axially connected to the first turntable 1 and is elastically rotatable and resetting. After the expansion frame 5 moves upward through the hole 3 on the first turntable 1, the end of the blocking rod 7 is connected to the hook 504 so that the expansion frame 5 gradually flips over and disengages during the upward movement. Figure 4 X' in the figure is the position of the change in state after the expansion bracket 5 contacts the end of the barrier rod 7 relative to the initial contact state. The initial state is Figure 4 At point X in the figure, the free end of the blocking rod 7 is initially located just above the hook 504 that has passed through the hole 3 and reset.

[0033] Specifically, in the initial state, the expansion frame 5 is mounted on the hanging frame 6, as shown in FIG. Figure 6In its tilted state, i.e., the initial state, the rubber sleeve moves upward under the push of the sleeve 4, and when moving upward, it first contacts the guide slide 501 of the expansion frame 5, and after contact, it pushes the expansion frame 5 to move upward in a small range and makes the guide slide 501 contact the surface of the screw, and the two clamp the guide slide 501 of the expansion frame 5 and rotate it, and the expansion part 502 on the expansion frame 5 approaches the bolt rod and fits it, and when rotating and moving upward, the expansion frame 5 is separated from the hanger 6, and then the expansion frame 5 continues to move upward with the rubber sleeve, and the upper end of the bolt contacts the limit block 8. At this time, the rubber sleeve moves axially relative to the bolt and begins to be inserted. When the expansion bracket 5 reaches the hole 3 on the first turntable 1, in order to allow the expansion bracket 5 to pass as a whole, the end of the expansion portion 502 is connected to the elastic portion 503, and the elastic portion 503 is arranged to be inclined downward, and the intersection position of the elastic portion 503 and the expansion portion 502 is directly below the inner diameter range of the hole 3 of the first turntable 1, so that the inclined surface of the elastic portion 503 contacts the bottom of the hole 3 and is compressed by the guide slide, and resets after passing. Since the elastic portion 503 needs to be compressed in the above process, the hook 504 is preferably arranged to extend to one side of the guide slide 501, that is, Figure 5 As shown, in this state, the hook 504 is covered by the elastic portion 503 in the vertical direction, so the hook 504 is set at the edge side (width direction) of the end of the elastic portion 503. After the expansion frame 5 passes through the hole 3, the elastic portion 503 is reset, and as the expansion frame 5 moves upward, the hook 504 begins to contact one end of the blocking rod 7, as shown in FIG. Figure 9 As shown, one end of the blocking rod 7 has a corner, and the hook 504 is connected to the corner so that one end of the expansion frame 5 is restricted. Figure 4 Point X shown in the figure, that is, the corner in the initial state is located directly above the hook 504 after passing through the hole 3 and resetting. After the expansion frame 5 rises and contacts the corner through the hook 504 (as shown in FIG. Figure 10 As shown in the contact state), due to the length limit of the stop bar 7 and the rise of the expansion frame 5, the corner slides and rotates relatively in the hook 504, and the expansion frame 5 flips so that the hook 504 and the corner reach Figure 4 The position of X' in the image is kept restricted;

[0034] As the end of the hook 504 of the expansion frame 5 is restricted, the rubber sleeve continues to move upward, forming the two ends of the expansion frame 5 upward and downward respectively, thereby rotating during movement. After moving and rotating, the expansion frame 5 begins to move laterally as the inclination angle increases, so that the expansion frame 5 is separated from the rubber sleeve. Preferably, this process is set when the rubber sleeve reaches the nut position of the bolt, the expansion frame 5 is completely separated, and the expansion frame 5 after separation will fall onto the first turntable 1. The expansion frame 5 under this embodiment adopts a loading and unloading method for circulation, that is, the expansion frame 5 is placed on the hanger 6 by a structure such as a robotic arm, and at least three groups of expansion frames 5 are provided, such as Figure 7As shown, the three groups of expansion frames 5 are relatively evenly arranged on a circle centered on the axis of the screw. The three groups form a triangular state to open the upper end of the rubber sleeve so that it does not fit the side wall of the bolt rod, and thus no cracks will be caused by the inward rotation of the thread or the side wall during the upward movement.

[0035] See Figure 5 A limiting rod 9 is connected below the junction of the expansion portion 502 and the elastic portion 503 to form a mounting position through the limiting rod 9, and then mounted on the mounting bracket 6. In order to maintain the stability of the initial state, the overall mass ratio of the expansion bracket 5 is set so that the center of gravity is located at Figure 5 The position directly below the hanger 6 in the state.

[0036] See Figure 4 and Figure 8 The outer edge of the limit block 8 is provided with a convex portion, and the lower surface of the convex portion is flush with the lower surface of the nut after the bolt moves up and contacts the limit block 8, so that when the expansion frame 5 moves up and outward, the lower convex of the limit block 8 plays a guiding role and can be smooth;

[0037] Furthermore, in order to avoid interference with the bolts after the expansion frame 5 falls, that is, the expansion frame 5 will enter the hole 3 and the bolts cannot be completely reset, a magnet is set at the lower convex position of the limit block 8, and correspondingly, a ferromagnetic metal that can be adsorbed is set at the corresponding position on the expansion frame 5. The expansion frame 5 as a whole can also be set to ferromagnetic metal, that is, metal materials such as iron, cobalt, and nickel, which can be adsorbed by magnets.

[0038] Furthermore, it is relatively cumbersome to load and unload the expansion rack 5 by means of a robotic arm. Therefore, as another embodiment, the hanger 6 is set as a guide rail, that is, one end of the guide rail is located above the first turntable 1, and the other end is below the first turntable 1 and above the second turntable 2. The guide rail is set in an inclined downward manner so that the expansion rack 5 can automatically slide down. The number of guide rails corresponds to the number of expansion racks 5. Figure 8 As shown, the upper end of the guide rail is arranged at the front side in the forward direction of the adjacent expansion frame 5, and correspondingly, the end of the blocking rod 7 is arranged on the other side of the same expansion frame 5 (i.e., the opposite side in the forward direction). In this state, the state of the expansion frame 5 can be stabilized due to the arrangement of the magnet, and at the same time, the blocking rod 7 does not separate from the hook 504 due to the corner arrangement. Therefore, as the first turntable 1 rotates, the expansion frame 5 is pushed to move, and then the expansion frame 5 is pushed to the upper end of the hanging bracket 6 and separates from the magnet, and slides down the guide rail to the lower end (initial position) under the action of its own weight.

[0039] like Figure 8As shown, this embodiment is different from the embodiment in which the expansion frames 5 are arranged in three groups. In this embodiment, the expansion frames 5 are arranged in four groups. The expansion frames 5 expand the rubber sleeve into a rectangular shape. In this embodiment, the width range of the expansion frames 5 can be reduced, and the radial stretching range of the rubber sleeve can be reduced.

[0040] Furthermore, a guide plate 10 is provided at the lower convex position of the limit block 8 , and the guide plate 10 guides the expansion frame 5 so that its width direction faces the upper end of the guide rail.

[0041] like Figure 5 As shown, the lower end of the guide slide 501 on the side that contacts the bolt is provided with a wear-resistant surface. Since a single bolt is assembled once, the wear resistance of the material of the wear-resistant surface can be stronger than that of the bolt to ensure the recycling of the expansion frame 5.

[0042] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic assembly device for bolts and rubber sleeves, comprising a first turntable (1) and a second turntable (2), wherein holes (3) for bearing bolts and rubber sleeves are respectively opened on the outer diameter edges of the first turntable (1) and the second turntable (2), and when the rotation stops, there is always a rubber sleeve corresponding to the hole (3) of the bolt on the first turntable (1) and the second turntable (2), and a sleeve (4) is provided below the corresponding hole (3) of the rubber sleeve and the bolt to lift the rubber sleeve and insert it into the bolt, characterized in that: An expansion frame (5) for expanding the upper end of the rubber sleeve is provided in the middle of the corresponding hole positions (3) of the first turntable (1) and the second turntable (2) in the vertical direction. The expansion frame (5) is mounted on the hanger (6). The expansion frame (5) is provided with at least three groups and is distributed around the circumference at the same horizontal height. The expansion frame (5) is composed of a guide slide (501), an expansion support portion (502), an elastic portion (503) and a hook (504). Each part is connected in sequence to form a whole. The guide slide (501) is inclined toward the axis of the rubber sleeve in the vertical direction and the lower end is located within the positive direction range of the inner diameter surface of the rubber sleeve. When the guide slide (501) contacts the rubber sleeve and the bolt, the expansion support portion (502) contacts the rod of the bolt to keep the guide slide (501) in an inclined state so as to expand the upper end of the rubber sleeve. When the elastic part (503) contacts the bolt, it is compressed and deformed when it touches the hole (3) when the rubber sleeve and the bolt move upward as a whole, and resets when it leaves the hole (3). After the expansion frame (5) passes through the hole (3), the elastic part (503) resets and the hook (504) contacts the stop rod (7) located above the first turntable (1). The stop rod (7) causes the hanger (6) to flip and leave the gap between the rubber sleeve and the bolt. A limit block (8) is provided directly above the bolt. The limit block (8) contacts the end of the bolt after the rubber sleeve and the bolt move upward synchronously, so that the rubber sleeve and the bolt move relative to each other and are inserted. The hook (504) on the expansion frame (5) bends toward the guide slide (501), and the hook (504) is located outside the edge of the expansion frame (5) in the width direction of the expansion frame (5).

2. The automatic assembly equipment for bolt and rubber sleeve according to claim 1, characterized in that: A limiting rod (9) is provided on the lower surface of the junction of the expansion portion (502) and the elastic portion (503) on the expansion frame (5), and is mounted on the hanging frame (6) through the limiting rod (9).

3. The automatic assembly equipment for bolt and rubber sleeve according to any one of claims 1 or 2, characterized in that: The overall proportion of the expansion support frame (5) is such that the guide slide portion (501) is inclined in the initial state on the hanger (6), and the lower end portion of the guide slide portion (501) is located directly above the hollow aperture range of the rubber sleeve.

4. The automatic assembly equipment for bolt and rubber sleeve according to claim 3, characterized in that: One end of the blocking rod (7) is hinged to the upper end surface of the first turntable (1), and when the expansion frame (5) moves upward, the other end of the blocking rod (7) is hung on the hook (504) to turn the expansion frame (5) over.

5. The automatic assembly equipment for bolt and rubber sleeve according to claim 4, characterized in that: The outer edge of the limit block (8) is convex downward, and the thickness after the convexity is the same as the thickness of the nut of the bolt. A magnet is set at the convex part of the limit block (8), and the corresponding part or the whole of the expansion frame (5) is set to ferromagnetic metal.

6. The automatic assembly equipment for bolt and rubber sleeve according to claim 5, characterized in that: The hanging bracket (6) is a guide rail extending from the first turntable (1) to the second turntable (2), one end of the guide rail is located on the forward side of the expansion frame (5) rotating with the stop rod (7), and under the action of the stop rod (7) and the magnet, the expansion frame (5) moves and is mounted on the guide rail, and slides down along the guide rail to the other end, and the other end of the guide rail is the initial state position of the expansion frame (5).

7. The automatic assembly equipment for bolt and rubber sleeve according to claim 1, characterized in that: A wear-resistant surface is provided on the side of the lower end of the guide slide (501) that contacts the bolt.

8. The automatic assembly equipment for bolt and rubber sleeve according to claim 6, characterized in that: A guide plate (10) is further provided at the lower convex position of the limit block (8), and the guide plate (10) adjusts the angle of the expansion support frame (5) after being adsorbed.

Images