CN117208566A

CN117208566A - Material moving device of miniature bearing retainer

Info

Publication number: CN117208566A
Application number: CN202311485247.2A
Authority: CN
Inventors: 钱庆华; 顾征涛; 陆亚军
Original assignee: Suzhou Tie Jin Science & Technology Corp ltd
Current assignee: Suzhou Tie Jin Science & Technology Corp ltd
Priority date: 2023-11-09
Filing date: 2023-11-09
Publication date: 2023-12-12
Anticipated expiration: 2043-11-09
Also published as: CN117208566B

Abstract

The invention relates to a material moving device of a miniature bearing retainer, which is matched with a vibration feeding device to receive the retainer sent out by the vibration feeding device, wherein the material moving device comprises a material receiving base arranged at a discharge hole of the vibration feeding device, an adsorption mechanism for adsorbing the retainer in a trough and a buffer assembly, the material receiving base is arranged at the discharge hole of the vibration feeding device, the top of the material receiving base is provided with a trough for receiving a single retainer, and the trough is in butt joint with the discharge hole of the vibration feeding device so that the retainer is conveyed into the trough. According to the material moving device of the miniature bearing retainer, the buffer medium is set to be fluid, the fluid is directly contacted with the bottom end of the retainer, upward supporting force is provided for the buffer medium, and the retainer is suspended, so that the retainer body constructed at the bottom end of the retainer cannot be subjected to concentrated pressure when the adsorption mechanism is pressed down, and the possibility of deformation of the retainer body is reduced.

Description

Material moving device of miniature bearing retainer

Technical Field

The invention belongs to the field of bearing production, and particularly relates to a material moving device of a miniature bearing retainer.

Background

The retainer on the bearing assembly production line adopts the mode of vibration dish pay-off more, and the vibration of vibration dish is followed to the retainer, can be carried to the material device that moves that shifts it to next processing procedure in, move the material device including the material base that holds that is used for bearing the retainer and be used for adsorbing and shifting the adsorption mechanism of retainer, wherein adsorption mechanism can control the vacuum nozzle at the in-process of adsorbing the retainer and move down, and at the in-process that the vacuum nozzle moved down, its adsorption end can with the terminal surface butt of retainer, at this moment, just can exert decurrent pressure to the retainer, causes the retainer to take place deformation damage.

Therefore, in order to solve the above problems, a buffer assembly consisting of a spring and a material supporting member is installed in a part of the material moving device so as to relieve the pressure applied to the retainer when the vacuum suction nozzle is pressed down. Specifically, a trough for bearing the retainer is formed in the material bearing base, the trough extends downwards along the vertical direction to form a buffer trough, the spring and the material supporting piece are installed in the buffer trough, the spring is vertically arranged on the lower side of the material supporting piece, one end of the spring is fixedly limited, the other end of the spring is abutted to the bottom of the material supporting piece to provide vertical supporting force for the spring, and the top of the material supporting piece is flush with the inner bottom wall of the trough under the action of the spring and the limiting structure. When the retainer falls into the trough, the retainer can be placed on the top of the material supporting piece, then the adsorption mechanism moves downwards, the retainer is pressed, the material supporting piece moves downwards along with the retainer, and the spring is compressed, so that pressure relief is realized, and the possibility of the pressed deformation of the retainer is reduced.

However, the above-mentioned buffer assembly has a certain pressure relief effect, but the above-mentioned buffer assembly has a poor pressure relief effect for some holders having a specific structure, such as a miniature bearing holder shown in fig. 1, the holder has a main body of an annular member, one end face of the annular member is configured with a plurality of arc-shaped notches distributed at equal intervals, and on the end face side of the annular member configured with notches, both sides of each notch are configured with arc-shaped holding bodies in an opposed manner, so that the arc-shaped notches form a limit structure for mounting balls in surrounding relation to the holding bodies provided on both sides thereof. The retainer is small in size, the protruding retainer body is arranged at one end with the notch, and the retainer can be subjected to screening and discharging posture adjustment of the vibration feeding device before discharging, so that after the retainer is discharged, the direction of one side with the notch and the retainer body is downwards arranged, the retainer body is abutted with the top of the material supporting piece, after the retainer body is downwards moved and pressed by the vacuum suction nozzle, the retainer body is abutted with the top of the material supporting piece, and at the moment, the force exerted on the retainer body is very easy to exceed the bearing limit of the retainer body, so that deformation damage of the retainer body is caused.

Accordingly, there is a need for an improvement over the prior art to overcome the deficiencies described in the prior art.

Disclosure of Invention

The invention aims to provide a material moving device capable of preventing a retainer from being deformed under pressure.

The invention solves the problems by adopting the following technical scheme: a material moving device of miniature bearing holder, cooperates with vibration material feeding unit to accept the holder that vibration material feeding unit sent, material moving device includes:

the material bearing base is arranged at the discharge port of the vibration feeding device, a trough for bearing a single retainer is formed at the top of the material bearing base, and the trough is in butt joint with the discharge port of the vibration feeding device so that the retainer can be conveyed into the trough.

The adsorption mechanism is used for adsorbing the retainer in the trough, is arranged above the material bearing base and can move up and down relative to the material bearing base.

And the buffer component is arranged in a buffer groove formed by the vertical downward extension of the trough and can release the force exerted on the retainer when the adsorption mechanism moves downwards, and the buffer component comprises a buffer medium which comprises fluid or an elastic piece.

Preferably, the material moving device further comprises a first telescopic piece connected with the material bearing base to drive the material bearing base to move along a first direction, wherein the first direction is limited in a horizontal plane and is perpendicular to the end part of the material outlet of the vibration material feeding device, so that when the material groove is misplaced with the material outlet of the vibration material feeding device, the end part of the material outlet of the vibration material feeding device is still abutted against the side surface of the material bearing base.

Preferably, the adsorption mechanism includes:

the vacuum generator has adsorption part attached to the end of the holder.

And the second telescopic piece is connected with the vacuum generator to drive the vacuum generator to move along a second direction, and the second direction is limited in a vertical plane and is perpendicular to the horizontal plane.

Preferably, the buffer medium is a fluid, the buffer reservoir is circular in cross-section, the buffer assembly further comprising:

and a second end pipe connected to the buffer tank, one end of which is inserted from the bottom of the buffer tank and the other end of which is connected to a compression source to introduce fluid into the buffer tank.

The locating rod is arranged in the buffer groove and is coaxially arranged with the buffer groove, and the locating rod is round in cross section.

The inner peripheral side of the cross section of the buffer tank and the peripheral side of the cross section of the positioning rod form concentric circles, the inner diameter of the buffer tank corresponds to the outer diameter of the concentric circles, the diameter of the positioning rod corresponds to the inner diameter of the concentric circles, the outer diameter of the concentric circles is identical to the outer diameter of the retainer, and the inner diameter of the concentric circles is identical to the inner diameter of the retainer, so that the inner peripheral side and the outer peripheral side of the retainer sleeved on the positioning rod can be respectively attached to the inner wall of the buffer tank and the outer side of the positioning rod.

Preferably, the positioning rod is provided with a controlled support assembly near the top end, comprising a number of lateral supports constrained to move horizontally and controlled, to provide an upward supporting force for the cage fitted over the positioning rod.

Preferably, the bottom end of the suction member is provided with a top contact member, and the support assembly is pressed by the top contact member when the suction mechanism moves down the suction holder, so that each lateral support member moves into the positioning rod.

Preferably, the support assembly further comprises:

the pressure bar is arranged in an end groove formed in the top end of the positioning bar along the axial direction, a plurality of connecting rods are formed on the periphery of the pressure bar, and positioning protrusions are formed at one ends, deviating from the pressure bar, of the connecting rods.

The first spring is arranged in the end groove, and two ends of the first spring are respectively abutted with the bottom end of the positioning rod and the inner bottom wall of the end groove.

The inner wall of end slot week side constructs along the horizontal direction has a plurality of side grooves, and a plurality of side direction support piece one-to-one sets up in the side inslot to make side direction support piece be restricted to horizontal migration, and, each side direction support piece all is constructed in the one side towards the depression bar and is supplied the intercommunication groove that the connecting rod stretches into, and all is constructed the drive groove on the inner wall of each intercommunication groove, and the location protruding slidable inlays in the drive groove.

The driving groove is a linear groove, the extending direction of the driving groove and the horizontal plane form an included angle, and the included angle is configured to enable the positioning protrusion to be abutted against the inner wall of the driving groove when the pressure lever is lifted so as to drive the lateral supporting piece to move towards or away from the axis direction of the positioning lever.

Preferably, the buffer medium is an elastic piece, and the buffer assembly further comprises a material supporting piece arranged in the buffer groove and a first end pipe connected with the material supporting base.

Wherein, hold in the palm the material piece and be restricted to along the extending direction of buffer tank and remove to the highest when holding in the palm the material piece, its top flushes with the interior bottom wall of silo to accept the holder.

Wherein, the one end of first end pipe inserts from the buffer tank bottom to, the elastic component sets up inside first end pipe, and two atress ends of elastic component are connected with the bottom of holding in the palm the material piece and the interior bottom wall of first end pipe respectively, in order to provide ascending holding force for holding in the palm the material piece.

Preferably, the outer side of the absorbing member is provided with a pressure receiving portion, so that the absorbing member is elastically deformed when the pressure receiving portion is abutted against a foreign object.

The top of the material bearing base is provided with a sliding groove which is communicated with the trough and extends along the first direction, and the pressed part is abutted with the top of the material bearing base in the process of downwards moving and embedding the adsorption piece into the sliding groove so that the adsorption piece is elastically deformed in the vertical direction.

After the first telescopic piece drives the material bearing base and the adsorption piece to move relatively so that the adsorption piece moves into the trough, a gap is reserved between the pressure receiving part and the inner wall of the trough, and the vertical length of the adsorption piece is recovered to be long, so that the adsorption end of the adsorption piece can be abutted with the top end of the retainer in the trough.

Preferably, the contact position of the sliding groove and the pressure receiving piece is provided with a plurality of sliding components for reducing friction force, each sliding component comprises a mounting seat arranged on the material receiving base, and balls limited on the ball seat are arranged in the mounting seat.

Compared with the prior art, the invention has the following advantages and effects:

according to the material moving device of the miniature bearing retainer, the buffer medium is set to be fluid, the fluid is directly contacted with the bottom end of the retainer, upward supporting force is provided for the buffer medium, the retainer is suspended, so that the retainer constructed at the bottom end of the retainer cannot be subjected to concentrated pressure when the adsorption mechanism is pressed down, the deformation possibility of the retainer is reduced, and further, the support component for supporting the retainer is arranged on the positioning rod, the control difficulty of the fluid pressure in the buffer tank is reduced, and the continuous operation of the material moving device can be ensured only by measuring the fluid pressure required by the suspension of the retainer through experiments.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of the present invention.

Fig. 2 is an enlarged view of the present invention at a in fig. 1.

Fig. 3 is a schematic view showing a connection state of the adsorption mechanism to the material-receiving base after the adsorption mechanism moves down in the first embodiment of the present invention.

FIG. 4 is a view showing a state where the suction member is inserted into the slip groove after the suction mechanism is moved down in the first embodiment of the present invention.

Fig. 5 is a state diagram of the first telescopic member driving the material receiving base to move the material tank right under the adsorbing member in the first embodiment of the present invention.

Fig. 6 is a schematic structural view of a material-bearing base according to a first embodiment of the present invention.

Fig. 7 is an exploded view of the slip assembly in the first embodiment of the present invention.

Fig. 8 is a side cross-sectional view of a second embodiment of the present invention.

Fig. 9 is an enlarged view of the present invention at B in fig. 8.

Fig. 10 is a state diagram of the contact member abutting the compression bar after the suction member is moved down in the second embodiment of the present invention.

Fig. 11 is an enlarged view of fig. 10C of the present invention.

Fig. 12 is a schematic structural view showing a connection state of the second sleeve, the pressing rod and the supporting member in the second embodiment of the present invention.

Fig. 13 is an exploded view of a second sleeve, plunger and support assembly in a second embodiment of the invention.

Fig. 14 is a side cross-sectional view of a support assembly in a second embodiment of the invention.

FIG. 15 is a schematic view showing the connection relationship between the pressing lever, the connecting rod and the positioning boss in the second embodiment of the present invention.

Fig. 16 is a schematic view showing a connection state of the positioning rod, the jacking member and the material receiving base in the third embodiment of the present invention.

Fig. 17 is an enlarged view of the invention at D in fig. 16.

Fig. 18 is an enlarged view of fig. 16 at E in accordance with the present invention.

Fig. 19 is a schematic structural view of a jack in a third embodiment of the present invention.

Fig. 20 is a side cross-sectional view of a lifting member in a third embodiment of the invention.

Fig. 21 is a schematic structural view of a miniature bearing retainer of the present invention.

Wherein: 1. a vibration feeding device; 110. a discharge port; 120. a feeding channel; 2. a material bearing base; 210. a trough; 220. a buffer tank; 230. a slip groove; 3. an adsorption mechanism; 310. a vacuum generator; 320. an absorbing member; 321. a pressure receiving portion; 330. a second telescopic member; 340. a top contact; 4. a buffer assembly; 410. an elastic member; 420. a material supporting piece; 430. a first end tube; 440. a second end tube; 441. an inner bracket; 450. a positioning rod; 451. an end groove; 4511. a side groove; 452. a moving groove; 453. a first diversion trench; 460. a jacking member; 461. a conical protrusion; 4611. an arc-shaped groove; 462. a second diversion trench; 463. a push rod; 464. a pipe fitting; 5. a static electricity eliminating mechanism; 6. a first telescopic member; 7. a linear guide mechanism; 8. a slip assembly; 810. a ball seat; 811. a mounting base; 812. a top base; 820. a ball; 9. a support assembly; 910. a lateral support; 911. a communication groove; 912. a driving groove; 920. a compression bar; 930. a first spring; 940. a connecting rod; 941. positioning the protrusion.

Detailed Description

The following describes in further detail the embodiments of the present application with reference to the drawings and examples. The following examples are illustrative of the application and are not intended to limit the scope of the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art in a specific case.

Referring to fig. 21, the cage in the present application is a cage applied to a micro bearing, which is installed between an inner ring and an outer ring of the bearing for restricting the relative positions of steel balls, which can be restricted between the inner ring and the outer ring.

Specifically, the main body structure of the retainer is annular, one end face of the retainer is provided with a plurality of arc-shaped notches which are distributed at equal intervals, and two sides of each arc-shaped notch are provided with arc-shaped retaining bodies in an opposite mode, so that each arc-shaped notch and the retaining bodies on two sides of each arc-shaped notch are surrounded to form a limiting structure for installing steel balls, the steel balls are limited in the limiting structure, and the steel balls can only roll in the limiting structure and cannot be separated.

Referring to fig. 1, 3, 8 and 9, in the present application, the cage is transferred from the discharge port 110 of the vibratory feeding device 1 to a transfer device for transferring the cage to the next process, and the vibratory feeding device 1 adjusts the discharge posture of the cage during the passage of the vibratory feeding device 1 so that the end configured with the notch is disposed downward when the cage is transferred to the discharge port 110. The transfer device comprises a material receiving base 2 configured with a trough 210 for receiving the holder, an adsorption mechanism 3 for adsorbing and transferring the holder, and a buffer assembly 4 arranged on the material receiving base 2.

Specifically, the material-receiving base 2 is a rectangular member with a top surface configured to be parallel to a horizontal plane, which is disposed at the discharge port 110 of the vibration feeding device 1 by a mounting frame, and has a top portion configured with a trough 210 capable of receiving only a single cage, the trough 210 is preferably a circular trough having a diameter slightly larger than an outer diameter of the cage and a depth slightly larger than a thickness of the cage, and the trough 210 is configured with a through trough in a horizontal direction on an inner wall of a side close to the discharge port 110 of the vibration feeding device 1 so that the trough 210 communicates with the discharge port 110 of the vibration feeding device 1 to facilitate conveying the cage into the trough 210. The suction mechanism 3 comprises a vacuum generator 310, a suction member 320 and a second telescopic member 330, the second telescopic member 330 is a controlled linear telescopic member, the linear moving direction of the second telescopic member 330 is limited to be a vertical direction, the movable end of the second telescopic member 330 is connected with the vacuum generator 310 through a fixing member so as to drive the vacuum generator 310 to lift, and the vacuum generator 310 is always limited above the material bearing base 2, wherein the suction end of the vacuum generator 310 is downward, and the suction member 320 for sucking the retainer is installed on the suction end. In the present application, the second telescopic member 330 is a telescopic cylinder, and in other embodiments, the second telescopic member 330 may be another device having a linear telescopic function, such as a linear electric push cylinder, etc., which is not limited herein, and is according to the actual situation. The buffer assembly 4 is arranged in the material bearing base 2, the trough 210 is provided with a through buffer groove 220 extending downwards along the vertical direction, the buffer assembly 4 is arranged in the buffer groove 220, and when the adsorption mechanism 3 moves downwards to adsorb the retainer, the buffer assembly 4 can relieve the pressure applied by the adsorption component 320 to the retainer so as to reduce the possibility of the compression deformation of the retainer. The damping assembly 4 comprises a damping medium having the effect of absorbing or reducing energy from motion or vibration, while the damping medium comprises an elastic member 410 or a fluid.

It should be noted that, if the discharging end of the feeding channel 120 of the vibration feeding device 1 is attached to the side surface of the material receiving base 2, the material receiving base 2 may be affected by vibration during feeding of the vibration feeding device 1, so a physical gap (not shown) exists between the discharging end of the feeding channel 120 and the material receiving base 2, and the width of the gap needs to be determined according to the actual size of the retainer, so that the requirement of normal conveying of the retainer between the vibration feeding device 1 and the material receiving base 2 can be met.

Referring to fig. 1 and 7, after the adsorption mechanism 3 absorbs the holder, the holder needs to be transferred to the next production process, at this time, the adsorption mechanism 3 can be driven to move by a linear guide mechanism 7, and the linear guide mechanism 7 is preferably an electric linear guide, and comprises a linear support rail and a sliding table slidingly connected with the linear support rail, wherein the linear support rail is fixedly installed on the installation frame, the adsorption mechanism 3 is fixedly installed on the sliding table, and the moving track of the sliding table is limited in a horizontal plane so as to play a role in driving the adsorption mechanism 3 to horizontally move.

In the process of conveying the holders from the discharge port 110 of the vibration feeding device 1 to the trough 210, a plurality of holders conveyed from a tray are arranged in the feeding channel 120, the circumferential side of the holder at the discharge port 110 is abutted against the circumferential side of the holder positioned in the trough 210, and the two holders may be adsorbed and adhered due to static electricity generated by vibration friction, because in the process of conveying the holders by the vibration feeding device 1, adjacent holders may rub against each other in the forward feeding process, static electricity may be generated between the adjacent holders, and when the distance between the adjacent holders is small, mutual adsorption may occur between the adjacent holders due to static electricity. It should be noted that, although the conventional vibration feeding device 1 is mostly provided with the static eliminating mechanism 5, the principle is that a great amount of positive and negative ions generated after the air is ionized are blown to the surface of the retainer to neutralize static electricity, the static eliminating mode also has leakage, particularly when the retainer is fed into the feeding channel 120, the retainer in the feeding channel 120 still relies on vibration to realize movement, and in the process of continuously moving towards the discharging hole 110, contact friction can occur between adjacent retainers in the feeding channel 120, and the contact friction is likely to generate static electricity again on the retainer subjected to static electricity eliminating treatment, thereby affecting the adsorption transfer flow of the retainer.

Specifically, the first telescopic member 6 is a telescopic cylinder, and is fixedly installed on the installation frame, the movable end of the telescopic cylinder is fixedly connected with the material bearing base 2 so as to drive the material bearing base 2 to move along the first direction, the first direction is limited in the horizontal plane and is perpendicular to the end part of the material outlet 110 of the vibration feeding device 1, when the first telescopic member 6 stretches, the retainer in the trough 210 and the retainer at the material outlet 110 can be misplaced, so that the retainer which is adsorbed together due to static electricity originally can be separated, and in the process that the first telescopic member 6 drives the material bearing base 2 to move along the first direction, the end part of the material outlet 110 of the vibration feeding device 1 can always keep a butt state with the side surface of the material bearing base 2, so that the material outlet 110 is blocked, and the retainer in the material feeding channel 120 can be prevented from dropping. Also, in some embodiments, the side of the material receiving base 2 facing opposite the material outlet 110 is configured as a stepped surface to better fit the material outlet 110.

First embodiment referring to fig. 4-5, in this embodiment, the cushioning medium is an elastic member 410, and the elastic member 410 is preferably a spring. At this time, the buffer assembly 4 further includes a material supporting member 420 disposed in the buffer slot 220 for receiving the retainer and a first end pipe 430 inserted from the bottom end of the buffer slot 220, the elastic member 410 is disposed in the first end pipe 430, and both ends of the elastic member 410 are respectively abutted with the bottom end of the material supporting member 420 and the inner bottom wall of the first end pipe 430 to provide an upward supporting force for the material supporting member 420.

Specifically, the material supporting member 420 is a column body having a top plane and a bottom plane, the top plane and the bottom plane are disposed in parallel, and the top plane and the bottom plane are disposed perpendicular to the extending direction of the buffer slot 220, the material supporting member 420 is limited to move along the extending direction of the buffer slot 220, and the circumferential side of the material supporting member 420 is configured with a limit structure, and in order to adapt to the structure, a limit slot matched with the limit structure is configured on the inner wall of the buffer slot 220, so that the upward movement height of the material supporting member 420 is limited, and after moving to the highest position, the top surface of the material supporting member 420 is flush with the original inner bottom wall of the material slot 210 (the inner bottom wall is the inner bottom wall of the material slot 210 before the buffer slot 220 is not extended downwards), so as to receive the retainer fed into the material slot 210. At least one end of the first end pipe 430 is opened, and the opened end of the first end pipe 430 is inserted from the bottom of the buffer slot 220, and at this time, the first end pipe 430 is preferably connected to the buffer slot 220 by a threaded connection, so that a user can adjust the compression amount of the spring by screwing the first end pipe 430, thereby changing the elastic force applied by the spring to the material supporting member 420.

In specific implementation, firstly, after the retainer sent out from the discharge hole 110 falls into the trough 210, the first telescopic member 6 is retracted and moved to drive the material bearing base 2 to move along the first direction until the trough 210 moves below the absorbing member 320, then, under the driving of the second telescopic member 330, the vacuum generator 310 drives the absorbing member 320 to be pressed down together, so that the absorbing end of the absorbing member 320 at the bottom is pressed with the top end of the retainer, the retainer is pressed and then transfers the pressure to the material supporting member 420, the material supporting member 420 applies downward pressure to the spring, so that the spring is contracted to drive the retainer and the material supporting member 420 to move downwards together, and the spring plays roles of absorbing and slowly releasing the downward pressure in the contraction process, so that the probability of the pressed deformation of the retainer is reduced.

In practical use, the retainer body on the retainer is small in size (as shown in fig. 21), so that the retainer body can bear large pressure when being abutted against the top surface of the material supporting member 420, and therefore when the adsorption mechanism 3 moves down to adsorb the retainer, deformation damage is likely to occur to the retainer body at the moment that the adsorption member 320 contacts with the top end of the retainer due to the fact that the applied pressure exceeds the bearing capacity limit, and the problem can be solved by controlling the adsorption member 320 to move down in a segmented manner to reduce the instant pressure value of the retainer. First, the pressure receiving portion 321 is formed outside the suction member 320, and when the pressure receiving portion 321 abuts against a foreign object, the suction member 320 is elastically deformed in a vertical direction. The top of the material-bearing base 2 is configured with a sliding groove 230 which is communicated with the trough 210 and extends along a first direction, in the process that the absorbing member 320 moves downwards and is embedded into the sliding groove 230, the pressure-receiving portion 321 is abutted against the top of the material-bearing base 2 so as to enable the absorbing member 320 to be compressed and deformed in the vertical direction, after that, the first telescopic member 6 drives the material-bearing base 2 and the absorbing member 320 to relatively displace so as to enable the absorbing member 320 to move into the trough 210, and because a gap is reserved between the pressure-receiving portion 321 and the inner wall of the trough 210, the length of the absorbing member 320 in the vertical direction can be restored to the original length under the elastic action of the self material, and in order to enable the absorbing end of the absorbing member 320 with the restored original length to be abutted against the top end of the retainer in the trough 210, the depth of the trough 210 needs to be matched with the length of the absorbing member 320.

Specifically, the suction member 320 may be selected to be a vacuum nozzle shaped like a cone, which is made of an elastic material. The interval between the inner walls of the two sides of the sliding groove 230 parallel to the first direction is the width of the sliding groove 230, the shape of the pressed portion 321 is preferably an annular protrusion (as shown in fig. 3-5), the annular protrusion is configured on the peripheral side of the absorbing member 320, and the diameter of the annular protrusion should be larger than the width of the sliding groove 230, and the annular protrusion will abut against the material supporting base 2 during the process of embedding the absorbing member 320 into the sliding groove 230, so that the absorbing member 320 is compressed and deformed vertically, but the diameter of the material groove 210 should be larger than the diameter of the annular protrusion, when the absorbing member 320 moves into the material groove 210, the pressed portion 321 is placed in the material groove 210 and is separated from abutting against the material supporting base 2, so that the absorbing member 320 is restored to be long in the vertical direction, and when the vertical length of the absorbing member 320 is restored, the absorbing end on the lower side of the absorbing member 320 can abut against the top surface of the retainer located in the material supporting base 210, so as to realize the absorption of the retainer. In the process that the retainer is adsorbed, the force applied to the retainer by the adsorption piece 320 is only the elastic force generated when the vertical deformation of the adsorption piece 320 is recovered, and the elastic force is far smaller than the pressure applied to the retainer when the adsorption mechanism 3 is pressed down, so that the probability of deformation of the retainer due to the pressing is further reduced under the cooperation of the buffer assembly 4.

Referring to fig. 2, 6 and 7, in the process of driving the material supporting base 2 by the first telescopic member 6 to move along the first direction, the pressed portion 321 on the peripheral side of the adsorbing member 320 may generate sliding friction with the edge of the inner wall of the sliding groove 230, and after multiple material moving actions, the pressed portion 321 may generate serious abrasion.

Specifically, the ball seat 810 includes a mounting seat 811 and a top seat 812 mounted on the mounting seat 811, concave hemispherical grooves are formed on opposite sides of the mounting seat 811 and the top seat 812, the radius of each hemispherical groove is slightly larger than that of the ball 820, when the top seat 812 is spliced with the mounting seat 811, two hemispherical grooves surround to form a finished spherical groove, and a through groove for exposing a ball 820 is formed on one side of the top seat 812 away from the mounting seat 811, the size of the through groove is limited so as not to enable the ball 820 to deviate from the ball seat 810, and at this time, the ball 820 abuts against the pressed portion 321 through the exposed side of the through groove.

In particular, when the adsorption end of the adsorption element 320 moves down into the sliding groove 230, the pressed portion 321 abuts against the sliding component 8 at the side edge of the sliding groove 230, at this time, the exposed portion of the ball 820 through the through groove contacts with the pressed portion 321, and then, when the first telescopic element 6 drives the material bearing base 2 to move relative to the adsorption mechanism 3, the ball 820 rolls in the ball seat 810 under the action of friction force, so that the friction force applied to the pressed portion 321 during movement is reduced, the loss of the adsorption element 320 is reduced, and the service life is prolonged.

8-10, in this embodiment, the buffer medium is a fluid, which includes a gas. At this time, the buffer tank 220 is seen in cross section, and its cross-sectional shape is circular, and the buffer assembly 4 further includes a second end pipe 440 connected to the buffer tank 220 and a positioning rod 450 disposed inside the buffer tank 220 and coaxially disposed therewith.

Specifically, one end of the second end pipe 440 is an open end which is inserted into the inside of the buffer tank 220 from the bottom thereof, and the other end is hermetically disposed, and the sealed end is connected to a compression source (not shown) through a pipe, which provides a fluid having a certain pressure and guides the fluid into the buffer tank 220. The positioning rod 450 is connected to the second end pipe 440 by an inner bracket 441 extending in the axial direction on the inner wall of the second end pipe 440, the inner bracket 441 is configured with a plurality of fluid channels for fluid flow along the axial direction of the second end pipe 440, and the positioning rod 450 and the inner bracket 441 can be connected in a threaded manner, so that a user can adjust the height of the top end by screwing the positioning rod 450, and the top end of the positioning rod 450 is flush with the inner bottom wall of the trough 210.

In particular, when the retainer is fed into the trough 210 through the discharge port 110, the retainer falling into the trough 210 is sleeved on the positioning rod 450, and before the compression source is not started, the retainer slides down along the axial direction of the positioning rod 450, after the compression source is started, the fluid entering from the sealed end of the second end pipe 440 is jacked up from the bottom of the retainer to move upwards along the axial direction of the positioning rod 450, after that, the retainer can be maintained at a position where the top end of the retainer is slightly higher than the top end of the positioning rod 450 by controlling the flow rate of the fluid entering the buffer tank 220, but it is noted that the bottom end of the retainer is still partially sleeved with the top end of the positioning rod 450 at this time, then the adsorption mechanism 3 is under the cooperation of the linear guide mechanism 7 and the first telescopic member 6, and then the vacuum generator 310 and the adsorption member 320 start to move downwards under the driving of the second telescopic member 330 until the adsorption end of the adsorption member 320 is in contact with the top end of the retainer in the trough 210, and the retainer is in a very small deformation state, and the retainer is in a very small moment, although the retainer is deformed, and the probability of being further reduced, and the retainer is in a very small deformation state, although the retainer is in a very small contact state, after the retainer is contacted with the top end, and the retainer is stressed.

It should be noted that, in the process of lifting up and pushing up the retainer by the fluid, in order to prevent the retainer from being separated from the positioning rod 450, the inflow amount of the fluid needs to be controlled, at this time, a regulating valve (not shown in the figure) may be installed on a pipe connected to the compression source to regulate the inflow amount, and, in order to further enhance the control of the flow amount in the buffer tank 220, a pressure release pipe (not shown in the figure) communicating with the inside of the buffer tank 220 may be installed on the material-receiving base 2, and the pressure release pipe may be also provided with a regulating valve to control the external release amount of the fluid in unit time, and in order to accurately obtain the fluid pressure in the buffer tank 220 when the retainer is suspended, a pressure gauge (not shown in the figure) communicating with the buffer tank 220 needs to be further installed on the material-receiving base 2 to display the fluid pressure value in the buffer tank 220.

Referring to fig. 8 to 9, when there is a gap between the retainer sleeved on the positioning rod 450 and the inner wall of the buffer slot 220 and the circumferential side of the positioning rod 450, since the end surfaces of the retainer configured with the notch and the retainer body are placed downward, the notch and the retainer body may directly contact with the fluid, but since the shape of the notch and the retainer body is complicated, turbulence may be formed after the fluid contacts with the notch and the retainer body, uneven stress of the bottom end of the retainer may be caused, once there is a large gap between the inner circumferential side of the retainer and the outer circumferential side of the positioning rod 450, the retainer may be laterally deflected due to uneven stress of the bottom end, and in order to enable the retainer to stably lift in the axial direction of the positioning rod 450, the inner circumferential side and the outer circumferential side of the retainer sleeved on the positioning rod 450 need to be respectively attached to the inner wall of the buffer slot 220 and the circumferential side of the positioning rod 450, so that the retainer sleeved on the positioning rod 450 is restrained from the radial direction, so that the axial direction of the retainer is more controlled.

Specifically, since the positioning rod 450 is disposed coaxially with the positioning rod 220, when viewed in cross section, the inner circumferential side of the positioning rod 450 and the outer circumferential side of the positioning rod 220 form a concentric circle, at this time, the inner diameter of the positioning rod 220 corresponds to the outer diameter of the concentric circle, and the diameter of the positioning rod 450 corresponds to the inner diameter of the concentric circle, when the outer diameter of the concentric circle is identical to the outer diameter of the retainer, and when the retainer is sleeved on the positioning rod 450, the inner circumferential side and the outer circumferential side of the retainer are respectively bonded to the inner wall of the positioning rod 450 and the outer circumferential side of the positioning rod 220, so that the sealing of the gap between the inner circumferential side of the retainer and the outer circumferential side of the positioning rod 450 and the gap between the outer circumferential side of the retainer and the inner wall of the positioning rod 220 can be achieved, and the fluid flowing into the positioning rod 220 can only contact with one end of the retainer where the notch is formed.

Referring to fig. 9 to 15, in this embodiment, the fluid may be preferably gas, in order to prevent the ascending air flow from affecting the normal blanking of the cage, after the cage in the trough 210 is removed by the adsorbing member 320, the air intake into the buffer trough 220 needs to be temporarily stopped, and the air can be re-taken only after the cage sent out by the discharge port 110 falls into the trough 210, but in this process, the cage has a reciprocating lifting condition, after the cage falling into the trough 210 is sleeved with the top end of the positioning rod 450, the cage slides down along the axial direction of the positioning rod 450, and then, the air is re-introduced into the buffer trough 220, and the cage is jacked up by the air flow to rise, and in the rising process of the cage, the air intake of the fluid needs to be controlled, because the cage may be pulled out from the top end of the positioning rod 450 in the rising process of the cage along the axial direction of the positioning rod 450, so that in each material moving gap, the cage may exist. To reduce the risk of cage escape, the positioning rod 450 is provided near its top end with a controlled support assembly 9 comprising several lateral supports 910 movable in horizontal direction, a compression rod 920 arranged in an end slot 451 axially constituted by the top end of the positioning rod 450 and a first spring 930 arranged in the end slot 451 and located on the underside of the positioning rod 450. Wherein, the circumference of the pressure lever 920 is configured with a plurality of connecting rods 940, and each connecting rod 940 is configured with a positioning protrusion 941 at one end facing away from the pressure lever 920 along a direction perpendicular to the axial direction thereof. In addition, the bottom end of the adsorption piece 320 is provided with a protruding top contact piece 340, in the process that the adsorption mechanism 3 moves down to adsorb the retainer, the supporting component 9 is firstly abutted against the top contact piece 340, then the supporting component 9 is pressed, each lateral supporting piece 910 moves towards the axis direction of the positioning rod 450 until the lateral supporting piece 910 moves into the positioning rod 450 completely, so that the bottom end of the retainer is prevented from abutting against the top of the lateral supporting piece 910 when the retainer is pressed, and the retainer is prevented from extrusion deformation.

Specifically, a plurality of side slots 4511 are configured on the peripheral side of the inner wall of the end slot 451 along the horizontal direction, a plurality of side supporting members 910 are disposed in the side slots 4511 in a one-to-one correspondence manner, at this time, the side supporting members 910 can only move horizontally under the restriction of the side slots 4511, and each side supporting member 910 is configured with a communication slot 911 for inserting a connecting rod 940 on one side of the pressure lever 920, a plurality of connecting rods 940 are inserted into each communication slot 911 in a one-to-one correspondence manner, and the inner wall of each communication slot 911 is configured with a driving slot 912 along the extending direction perpendicular to the corresponding connecting rod 940, the driving slot 912 is a linear slot, the extending direction of the linear slot is inclined at an acute angle or an obtuse angle with the horizontal plane, in order to enable the side supporting members 910 to move horizontally while the pressure lever 920 moves axially, the driving slot 912 is configured to drive each side supporting member 910 to gather in the direction close to the axis of the positioning lever 450, when the pressure lever 920 moves upward, and each side supporting member 910 is diffused in the direction away from the axis of the positioning lever 450, so that the side supporting member 910 can realize the upward movement of the upper end portion, and the end portion of the protrusion 940 is required to slide in the positioning slot 912, and the side supporting member 912 is not required to move upward when the side supporting the inner wall 912 is positioned in the side supporting slot 912. After the pressing rod 920 is pressed by the top contact 340 and forced to move downward, in order to enable the pressing rod 920 to automatically move upward and return, two ends of the first spring 930 in a compressed state need to be respectively abutted against the bottom end of the positioning rod 450 and the inner bottom wall of the end groove 451, so as to provide a vertical elastic force for the pressing rod 920. It should be noted that the top of the lateral support member 910 is spaced from the top of the positioning rod 450 by a distance similar to the thickness of the cage.

In particular, during the process of adsorbing the holder by the adsorbing mechanism 3, the adsorbing member 320 moving right above the trough 210 descends under the driving of the second telescopic member 330, then the top contact member 340 at the bottom end of the adsorbing member 320 abuts against the top end of the pressing rod 920 to force the pressing rod 920 to move downward, while the pressing rod 920 moves downward, the connecting rod 940 drives the positioning protrusion 941 to move downward synchronously, during this process, the positioning protrusion 941 continuously abuts against the inner wall of the driving slot 912 near the axial center side of the pressing rod 920 to provide driving force for the lateral support member 910, and each lateral support member 910 moves horizontally into the lateral slot 4511 under the restriction of the lateral slot 4511, and then the lateral support member 910 can move freely along the axial direction of the positioning rod 450. When the suction mechanism 3 moves up under the driving of the second telescopic member 330, the pressing rod 920 and the connecting rod 940 rise together, the positioning protrusion 941 abuts against the inner wall of the driving slot 912 facing away from the axial center side of the pressing rod 920, so as to force each side supporting member 910 to move out of the side slot 4511, and at the same time, the air intake into the buffer slot 220 is stopped, and then the cage sent out from the discharge port 110 of the vibration feeding device 1 falls on top of the supporting structure formed by each side supporting member 910 after falling into the slot 210, so as to limit the downward movement of the cage, and finally, the pressure value of the buffer slot 220 is controlled to be near the pressure value required for keeping the cage in a suspended state by adjusting each adjusting valve and cooperating with the pressure gauge. Obviously, the pressure value required for the suspension of the cage can be determined experimentally. The supporting component 9 not only plays a role of supporting the retainer, but also enables the lateral supporting component 910 to be received in the lateral groove 4511 under the cooperation of the top contact component 340 so as to prevent the retainer from abutting against the top of the lateral supporting component 910 after being pressed, and can effectively prevent the retainer from deformation and damage.

Third embodiment referring to fig. 16-20, this embodiment differs from the second embodiment described above in that: first, the direction of the angle between the extending direction of the driving slot 912 and the horizontal plane is changed, the angle between the extending direction of the changed driving slot 912 and the horizontal plane is 180 ° increased or decreased based on the angle between the extending direction of the original driving slot 912 and the horizontal plane, and the structural direction of the positioning protrusion 941 is changed to adapt to the change of the extending direction of the driving slot 912, at this time, the positioning protrusion 941 is slidably embedded in the driving slot 912, and when the compression bar 920 moves up and down, the side wall of the positioning protrusion 941 abuts against the inner wall of the driving slot 912 on different sides to provide thrust for the lateral support 910, and the driving slot 912 is configured to: when the pressure lever 920 moves downward, each lateral support member 910 is driven to move in a direction away from the axis of the positioning rod 450, and when the pressure lever 920 moves upward, each lateral support member 910 is driven to move in a direction close to the axis of the positioning rod 450. Next, the first spring 930 is disposed on the upper side of the pressing rod 920, and the first spring 930 is in a compressed state, and when the pressing rod 920 moves upward, in order to enable the pressing rod 920 to move downward and return, two ends of the first spring 930 in the compressed state need to be respectively abutted against the top end of the positioning rod 450 and the inner top wall of the end slot 451, so as to provide a vertical downward elastic force for the pressing rod 920, and it should be noted that the end slot 451 is configured inside the positioning rod 450, and the inner top wall thereof is in a closed arrangement. Next, a moving groove 452 communicating with the end groove 451 is formed at the bottom end of the positioning rod 450, and a pneumatic lifting member 460 is provided in the moving groove 452, and after the fluid is introduced into the second end pipe 440, the lifting member 460 moves upward to press and lift the pressing rod 920, so that each lateral support member 910 moves in a direction approaching the axis of the positioning rod 450, thereby driving each lateral support member 910 to be received in the side groove 4511. Finally, during the retraction of each lateral support 910 into the corresponding lateral slot 4511, the fluid also provides a vertical thrust to the cage placed on top of the lateral support 910 that counteracts its weight.

Specifically, in this embodiment, the positioning rod 450 is directly connected to the second end pipe 440, the connection manner is preferably threaded, the moving slot 452 is configured at the center of the bottom end of the positioning rod 450, the end slot 451 vertically extends downward into the moving slot 452 and is communicated with the moving slot 452, the jacking member 460 is composed of a pipe 464 with one end closed and a push rod 463 disposed at the closed end of the pipe 464, the push rod 463 is preferably disposed at the center of the closed end of the pipe 464, and when the jacking member 460 is installed in the moving slot 452, the top end of the push rod 463 is inserted into the end slot 451. In order to prevent the jacking member 460 from being separated from the moving groove 452, an annular inner edge is formed on the inner wall of the moving groove 452 near the bottom end along the horizontal direction, when the jacking member 460 is only acted by gravity, the bottom end of the jacking member 460 is abutted against the top of the annular inner edge, so that the moving range of the jacking member 460 is limited, and a gap is reserved between the inner top wall of the moving groove 452 and the top end of the closed end of the pipe fitting 464, so that the jacking member 460 can be lifted in the moving groove 452. The driving force of the jacking member 460 is the fluid introduced through the second end pipe 440, and the fluid in the second end pipe 440 enters the pipe 464 through the open end of the pipe 464, and the inner wall of the pipe 464 is forced to move upwards after being pushed by the fluid, so that the top end of the push rod 463 abuts against the bottom end of the pressure rod 920 and pushes the pressure rod 920 to move upwards, so as to drive each lateral support member 910 to move towards the direction approaching to the axis of the positioning rod 450. At this time, however, the fluid introduced into the moving tank 452 and the pipe 464 through the second end pipe 440 cannot enter the buffer tank 220 to provide vertical support for the retainer, so that a plurality of first diversion trenches 453 are further configured on the inner wall of the moving tank 452 and a plurality of second diversion trenches 462 are configured on the inner wall of the pipe 464, so that the fluid in the pipe 464 sequentially enters the buffer tank 220 through the second diversion trenches 462 and the first diversion trenches 453. However, if the first diversion trench 453 and the second diversion trench 462 are always in the on state, the jacking member 460 may not be able to move upwards due to difficulty in obtaining enough thrust or the retainer may be able to separate from the trough 210 due to excessive pressure, so when the bottom end of the pipe 464 is abutted against the top of the annular inner edge, the first diversion trench 453 and the second diversion trench 462 should be in the off state, i.e. there is a dislocation in the vertical direction, so that the first diversion trench 453 is closed with the outer peripheral side of the pipe 464, the second diversion trench 462 is closed with the inner wall of the moving trench 452, and then the second diversion trench 462 gradually coincides with and communicates with the first diversion trench 453 only after the fluid is introduced into the pipe 464 and lifted upwards, and after the second diversion trench 462 is completely communicated with the first diversion trench 453, the jacking member 460 and the pressure lever 920 are lifted to the highest point at the same time, at this time, each lateral supporting member 910 is exactly moved into each lateral side trench 4511, and at the same time, the vertical supporting force applied by the air flow in the buffer trench 220 to the retainer is exactly suspended.

Further, since the second flow guide grooves 462 are formed on the circumferential side of the inner wall of the pipe member 464, in order to allow the fluid in the pipe member 464 to be guided to the second flow guide grooves 462, the circumferential side of the inner wall of the pipe member 464 is vertically downwardly configured with the tapered protrusions 461, the top edge of the circumferential side of the tapered protrusions 461 is aligned with the edge of the inner top wall of each second flow guide groove 462, and when the fluid enters the pipe member 464, the fluid is guided to the second flow guide grooves 462 by the outer side of the tapered protrusions 461, however, it may be difficult for the pipe member 464 to obtain a sufficient vertical lift force due to the tapered protrusions 461, so that it is also necessary to configure the downward tip of the tapered protrusions 461 as the upwardly concave arc-shaped grooves 4611 to expand the contact area with the fluid, thereby providing the pipe member 464 with a sufficient vertical thrust force.

It is apparent that a better buffering effect can be obtained by combining a part of the structure in the first embodiment with the second embodiment or the third embodiment, that is, when the buffering medium is set as fluid, the compression part 321 is configured at the outer side of the adsorption member 320, and when the compression part 321 abuts against a foreign object, the adsorption member 320 is elastically deformed in the vertical direction. The top of the material bearing base 2 is provided with a sliding groove 230 which is communicated with the trough 210 and extends along a first direction, in the process that the absorbing member 320 moves downwards and is embedded into the sliding groove 230, the pressure receiving part 321 is firstly abutted against the top of the material bearing base 2 so as to enable the absorbing member 320 to be compressed and deformed in the vertical direction, then the first telescopic member 6 drives the material bearing base 2 and the absorbing member 320 to move relatively, the absorbing member 320 moves into the trough 210, and a gap is reserved between the pressure receiving part 321 and the inner wall of the trough 210, so that the length of the absorbing member 320 in the vertical direction can be restored to be original length, and the absorbing end of the absorbing member 320 is abutted against the top end of the retainer in the trough 210. In summary, the pressure applied to the top end of the retainer is greatly reduced, so that the occurrence of an indentation on the top of the retainer can be effectively avoided, and the probability of deformation of the retainer at the bottom end of the retainer under the condition of only contacting with fluid after the retainer is subjected to the pressure is extremely low because the buffer medium is fluid.

The foregoing is merely illustrative of the present invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions, without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A material moving device of miniature bearing holder, with vibration material feeding unit cooperation to accept the holder that vibration material feeding unit sent, its characterized in that moves material device and includes:

the material bearing base is arranged at the discharge port of the vibration feeding device, a trough for bearing a single retainer is formed at the top of the material bearing base, and the trough is in butt joint with the discharge port of the vibration feeding device so that the retainer is conveyed into the trough;

the adsorption mechanism is used for adsorbing the retainer in the trough, is arranged above the material bearing base and can move up and down relative to the material bearing base;

2. The miniature bearing retainer transfer device of claim 1, further comprising: the first telescopic piece is connected with the material bearing base to drive the material bearing base to move along a first direction, and the first direction is limited in a horizontal plane and is perpendicular to the end part of the discharge port of the vibration feeding device, so that when the discharge port of the trough and the vibration feeding device are dislocated, the end part of the discharge port of the vibration feeding device is still abutted against the side surface of the material bearing base.

3. The transfer device of a miniature bearing retainer of claim 2, wherein the adsorption mechanism comprises:

the vacuum generator is provided with an adsorption part attached to the end face of the retainer at the adsorption end;

4. A miniature bearing holder transfer device according to claim 3, wherein: the buffer medium is fluid, and the buffer tank is circular along the cross section observation, and the buffer assembly still includes:

a second end pipe connected with the buffer tank, one end of which is inserted from the bottom of the buffer tank, and the other end of which is connected with a compression source to introduce fluid into the buffer tank;

The positioning rod is arranged in the buffer groove, is coaxially arranged with the buffer groove, and is circular in cross section;

5. The miniature bearing retainer transfer device of claim 4, wherein: the positioning rod is provided with a controlled support assembly near the top end, comprising a number of lateral supports limited to horizontal movement and controlled to provide an upward holding force for a holder that is placed over the positioning rod.

6. The miniature bearing retainer transfer device of claim 5, wherein: the bottom end of the absorption part is provided with a top contact part, and when the absorption retainer is downwards moved by the absorption mechanism, the supporting component is pressed by the top contact part, so that each lateral supporting part is moved into the positioning rod.

7. The miniature bearing retainer transfer apparatus of claim 6, wherein the support assembly further comprises:

the compression bar is arranged in an end groove formed in the top end of the positioning bar along the axial direction, a plurality of connecting rods are formed on the periphery of the compression bar, and positioning protrusions are formed at one ends of the connecting rods, which deviate from the compression bar;

the first spring is arranged in the end groove, and two ends of the first spring are respectively abutted with the bottom end of the positioning rod and the inner bottom wall of the end groove;

the inner wall of the peripheral side of the end groove is provided with a plurality of side grooves along the horizontal direction, a plurality of side supporting pieces are arranged in the side grooves in a one-to-one correspondence manner, so that the side supporting pieces are limited to move horizontally, one side of each side supporting piece, which faces the compression bar, is provided with a communicating groove for the connecting rod to extend in, the inner wall of each communicating groove is provided with a driving groove, and the positioning protrusions are slidably embedded in the driving grooves;

8. A miniature bearing holder transfer device according to claim 3, wherein: the buffer medium is an elastic piece, and the buffer assembly further comprises a material supporting piece arranged in the buffer groove and a first end pipe connected with the material bearing base;

Wherein the material supporting piece is limited to move along the extending direction of the buffer groove, and when the material supporting piece moves to the highest position, the top end of the material supporting piece is flush with the inner bottom wall of the groove so as to receive the retainer;

9. The miniature bearing retainer transfer device of claim 8, wherein: the outside of the absorbing piece is provided with a pressed part so that the absorbing piece is elastically deformed when the pressed part is abutted against an external object;

the top of the material bearing base is provided with a sliding groove which is communicated with the trough and extends along a first direction, and the pressed part is abutted with the top of the material bearing base in the process that the adsorption piece moves downwards and is embedded into the sliding groove, so that the adsorption piece is elastically deformed in the vertical direction;

10. The transfer device of a miniature bearing retainer of claim 9, wherein: the contact position of the sliding groove and the pressure receiving piece is provided with a plurality of sliding components for reducing friction force, each sliding component comprises a mounting seat arranged on the material receiving base, and balls limited on the ball seat are arranged in the mounting seat.