CN217172802U - Slip roller - Google Patents

Abstract

The utility model provides a slip roller belongs to roller technical field. It has solved how to satisfy the rolling refill of different thickness among the prior art and has carried out the rolling of membrane simultaneously. A slip roller comprises a shaft body and a plurality of rolling sleeves sleeved on the shaft body, wherein the plurality of rolling sleeves are attached to each other in pairs, each rolling sleeve comprises an outer ring and an inner ring which is positioned in the outer ring and rotates relative to the outer ring, the inner ring is tightly matched on the shaft body, a plurality of positioning lugs capable of sliding along the radial direction are arranged in the circumferential direction of the outer ring, a plurality of guide blocks protruding outwards are arranged in the circumferential direction of the inner ring, arc-shaped surfaces are arranged on the guide blocks, the arc-shaped surfaces protrude outwards in the radial direction, when the outer ring rotates relative to the inner ring, the inner ring pushes the positioning lugs outwards through the arc-shaped surfaces to enable the outer ends of the positioning lugs to protrude out of the outer peripheral surface of the outer ring, and a plurality of limiting parts capable of extending along the radial direction and protruding out of the outer peripheral surface of the outer ring are arranged on the outer ring. This slip roller satisfies the rolling refill of different thickness and carries out the rolling of membrane simultaneously.

Description

Slip roller

Technical Field

The utility model belongs to the technical field of the roller, concretely relates to slip roller.

Background

After the existing reflective material film is produced, because the width of the produced film is wide, in order to meet the product requirements of different specifications and widths, the film with the required width needs to be obtained by slitting and winding the film on a slip roller (also called a winding roller) through a slitting machine.

The Chinese patent document discloses a winding device [ application number is 201920280963.X ] of a film splitting machine, which is formed by assembling a motor, an air pump, an air expansion shaft and a contact pressing roller, wherein the motor drives the air expansion shaft to rotate at an adjustable set speed, the air expansion shaft is connected in a paper core of a wound film in a penetrating manner and driven by the air pump to be expanded into a whole, the air expansion shaft is connected and positioned in a bearing of a winding arm and is connected with the motor in a transmission manner, and the contact pressing roller is parallel and continuously and elastically pressed against the paper core and the surface of a film roll thereof.

The winding device gives the paper core used for winding the film sufficient strength rigidity and straightness by using the air expansion shaft, the paper core shaking phenomenon cannot occur in the initial acceleration process of winding, and the quality problem of winding starting wrinkles is thoroughly eliminated by combining the contact compression roller.

The defects are that the jacking strips outwards jack and position the winding paper core through the inflation of the air bag, the whole jacking strips are ejected out through the air bag, the outward ejection height of the whole jacking strips is the same, when a plurality of films with smaller widths need to be wound simultaneously, the inner diameter and the thickness of the winding paper core can be consistent only, and thus the consistent jacking and positioning state can be kept, but different customers have different requirements, the thicknesses of the winding paper cores possibly adopted by different customers are different, when the winding paper cores with different thicknesses need to be simultaneously processed, the jacking strips have certain ejection height, so the pretightening force acting on the winding paper cores is the same, when the ejection height of the jacking strips meets the height of the winding paper core with thicker thickness, the pretightening force relative to the winding paper core with thinner thickness is larger, and the situation that the jacking strips jack and the winding paper core are too tight occurs, resulting in deformation of the top of the winding core.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a slip roller, the utility model aims to solve the technical problem that: how to satisfy the rolling refill of different thickness and carry out the rolling of membrane simultaneously.

In order to solve the above problem, the utility model discloses a following technical scheme realizes:

the slip roller comprises a shaft body and is characterized in that a plurality of rolling sleeves are sleeved on the shaft body, every two rolling sleeves are attached to each other, each rolling sleeve comprises an outer ring and an inner ring which is located in the outer ring and can rotate relative to the outer ring, the inner ring is tightly matched on the shaft body, a plurality of positioning lugs capable of sliding along the radial direction are arranged in the circumferential direction of the outer ring, a plurality of guide blocks protruding outwards are arranged in the circumferential direction of the inner ring, arc-shaped surfaces are arranged on the guide blocks, the arc-shaped surfaces protrude outwards in the radial direction, when the outer ring rotates relative to the inner ring, the inner ring pushes the positioning lugs outwards through the arc-shaped surfaces to enable the outer ends of the positioning lugs to protrude out of the outer ring, and a plurality of limiting parts capable of stretching along the radial direction and protruding out of the outer ring.

The rolling sleeves are sleeved on the shaft body, because the inner rings are tightly matched on the shaft body, all the inner rings are fixed, the rolling paper cores with different thicknesses are respectively arranged on the rolling sleeves arranged on the shaft body, the limiting part arranged on each outer ring stretches along the radial direction and protrudes to pre-position the corresponding rolling paper core on the outer periphery of the outer ring, one of the rolling paper cores is rotated to drive the corresponding outer ring to rotate, the corresponding inner ring pushes the corresponding positioning lugs through the arc-shaped surfaces on the circumferential guide blocks to enable the outer peripheries of the outer rings protruding from the outer ends of the positioning lugs to abut against the corresponding rolling paper core, so that the positioning of the corresponding rolling paper core is realized, according to the steps, the positioning of the corresponding rolling paper core by other rolling sleeves can be respectively realized, and each rolling sleeve can pre-position the rolling paper core through the limiting part, the rolling paper core is rotated, the rolling paper core drives the corresponding outer ring to rotate, a plurality of guide blocks which protrude outwards are arranged in the circumferential direction of the inner ring, the arc-shaped surface on the guide blocks radially protrudes to enable the different parts of the arc-shaped surface to push the positioning lugs to enable the positioning lugs to protrude out of the outer circumferential surface of the outer ring at different heights, so that the positioning lugs arranged in the circumferential direction meet the pre-tightening force requirements of the rolling paper cores with different thicknesses, thereby realizing the positioning of the rolling paper cores with different thicknesses, a plurality of rolling sleeves are arranged on the shaft body, thereby being capable of meeting the requirement of rolling the rolling paper cores with different thicknesses simultaneously, the plurality of rolling sleeves are sleeved on the shaft body in an independent mode for rolling, when each rolling sleeve rolls the reflective film, because the outer ring can rotate relative to the inner ring, namely the outer ring can rotate forward and reversely relative to the inner ring, when the sleeve rolls, the over-loosening or over-tightening caused by the thickness difference of the reflective film occurs, the outer ring can rotate relative to the inner ring to adjust the rolling tightness in a self-adaptive mode, so that the quality of the split rolling of the reflective film is guaranteed.

In the slip roller, the arc-shaped surfaces are located at one circumferential end of the guide block on the inner ring, and the distance between one end of each arc-shaped surface and the outer ring is gradually reduced. In the process of outer ring rotation, the arc surface pushes the positioning lug from one end to the other end, the distance between one end of the arc surface and the outer ring is gradually reduced, the height of the positioning lug protruding out of the outer ring peripheral surface is gradually increased, and the diameter of the circumference formed by the outer ends of the plurality of positioning lugs is gradually increased, so that the positioning requirements of winding paper cores with different thicknesses are matched.

In the slip roller, the positioning bump includes a limiting portion and a protruding portion connected to the limiting portion, the limiting portion can slide on the arc-shaped surface, the protruding portion is connected to the outer ring in a penetrating manner and can slide along the radial direction of the outer ring, and the limiting portion can abut against the outer ring. Spacing portion slides along the arcwall face, and the bulge cross-under has guaranteed that spacing portion slides in the arcwall face from the outer peripheral face of inner ring after, from arcwall face one end to the gliding in-process of the other end, the bulge is worn out the high difference that the outer ring corresponds, satisfies the location requirement of the rolling refill of different thickness.

In the slip roller, the bottom of the limiting part is provided with an arc-shaped sliding block, and the top of the protruding part is provided with a plurality of anti-slip lugs. The arc-shaped sliding block ensures that the sliding block can reliably slide on the arc-shaped surface, and the plurality of anti-slip lugs ensure that the positioning lugs can reliably position the rolled paper core.

In the slip roller, each guide block is provided with a guide groove, the inner circumferential surface of the outer ring is fixed with a plurality of positioning columns, each positioning column is embedded in the corresponding guide groove, the outer ring is provided with a mounting hole penetrating through the positioning column, an elastic part is arranged in the mounting hole, one end of the elastic part is connected with a limiting part, the limiting part is partially positioned in the mounting hole, the other part of the elastic part protrudes out of the outer circumferential surface of the outer ring, and the other end of the elastic part acts on the inner ring. The positioning column is arranged in the guide groove, so that the inner ring is prevented from being separated from the outer ring, the elastic part is connected with the limiting part, the limiting part can stretch out and draw back along the radial direction under the action of the elastic part, the height of the limiting part protruding out of the outer circumferential surface of the outer ring is different, and the pre-positioning of the winding paper cores with different thicknesses is realized.

In the slip roller described above, the guide groove penetrates the guide block at both ends in the circumferential direction of the inner ring. The moving distance of the positioning column in the guide groove is ensured.

In the slip roller, the elastic member is a spring, and the other end of the elastic member is connected with a positioning ball which abuts against the inner ring. The positioning ball is abutted to the inner ring under the action of the elastic force of the spring, one end of the spring acts on the outer ring through the limiting piece under the action of the elastic force of the spring, and the other end of the spring acts on the inner ring, so that the rotated inner ring and the rotated outer ring are kept positioned.

In the slip roller, the limiting members are limiting balls, a plurality of retaining rings for blocking the corresponding limiting balls are arranged on the outer peripheral surface of the outer ring, and each limiting ball penetrates through the retaining ring. The baffle ring is convenient to install the elastic part, the limiting ball and the positioning ball, the baffle ring blocks and limits the limiting ball, and the limiting ball penetrates out of the baffle ring to achieve pre-positioning of the winding paper core.

In foretell slip roller, the both ends of axis body have cup jointed the stop collar, and two stop collars are all fixed a position on the axis body through the fastener, and a plurality of rolling cover is located two between the stop collar. Make a plurality of rolling cover paste through two stop collars and lean on and spacing, satisfy the rolling refill of a plurality of different thickness and set up simultaneously at the rolling cover, satisfy the rolling refill of different thickness and carry out the rolling of membrane.

In foretell slip roller, the axis body cavity sets up, the circumference of axis body has the mounting groove that a plurality of set up along axis body length direction, and a plurality of mounting groove all is linked together with the axis body is inside, all is provided with the ejector tie strip in every mounting groove, the inside of axis body is provided with the gasbag that can make the protruding mounting groove of a plurality of ejector tie strip. The air bag is inflated to enable the air bag to eject the plurality of top bracing strips out of the mounting grooves to be tightly matched with the inner ring, so that the inner ring is positioned, and the inner ring is positioned firmly.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the application discloses a slip roller, every receipts roll cover can carry out prepositioning to the rolling refill through the locating part, the rolling refill rotates, the rolling refill drives the outer loop that corresponds and rotates, the position top that makes the arcwall face difference on the guide block of the outside protrusion formation of corresponding inner ring pushes away the locating lug and makes the height difference of the outer peripheral face of the protruding outer loop of locating lug, the locating lug that makes a plurality of circumference set up satisfies the pretightning force requirement to the rolling refill of different thickness, thereby realize the location to the rolling refill of different thickness, set up a plurality of receipts roll cover on the axis body, thereby can satisfy the rolling refill of different thickness and carry out the rolling of membrane simultaneously.

2. The utility model provides a plurality of rolling cover adopts independent mode to cup joint and carries out the rolling on the axis body, when every rolling cover carries out the rolling of reflective membrane, because the outer loop can inner ring rotation relatively, the outer loop can inner ring forward rotation and counter rotation relatively promptly, appear when the rolling cover rolling because the thickness difference that the reflective membrane exists arouses when too loose or the tension, the outer loop can inner ring rotation self-adaptation adjust the elasticity of rolling relatively to the quality of reflective membrane bundling rolling has just been guaranteed.

Drawings

Fig. 1 is a sectional view of the present slip roller.

FIG. 2 is a cross-sectional view of the positioning lug of the present slip roller protruding out of the outer ring.

Fig. 3 is an exploded view of the present slip roller.

Fig. 4 is a schematic view of the structure of the slip roller.

Fig. 5 is an enlarged view of a portion a of fig. 1.

Fig. 6 is an enlarged view of a portion B of fig. 3.

FIG. 7 is a schematic view of a connection structure of the outer ring, the positioning bump, the positioning post, the position-limiting member and the positioning ball.

In the figure, 1, a shaft body; 11. mounting grooves; 2. rolling up the sleeve; 21. an outer ring; 211. mounting holes; 212. a baffle ring; 22. an inner ring; 221. a guide block; 2211. an arc-shaped surface; 2212. a guide groove; 3. positioning the bump; 31. a limiting part; 311. a slider; 32. a projection; 321. an anti-slip bump; 4. a positioning column; 5. an elastic member; 6. a limiting member; 7. a top stay; 8. an air bag; 9. a limiting sleeve; 10. and a positioning ball.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

Referring to fig. 1-7, a slip roller comprises a shaft body 1, a plurality of winding sleeves 2 are sleeved on the shaft body 1, the plurality of winding sleeves 2 are attached to each other in pairs, two ends of the shaft body 1 are sleeved with limit sleeves 9, two limit sleeves 9 are positioned on the shaft body 1 through fasteners, the plurality of winding sleeves 2 are positioned between the two limit sleeves 9, the plurality of winding sleeves 2 are abutted and limited through the two limit sleeves 9, a plurality of winding paper cores are simultaneously arranged on the winding sleeves 2 to meet the requirement that the plurality of winding paper cores carry out film winding, each winding sleeve 2 comprises an outer ring 21 and an inner ring 22 which is positioned in the outer ring 21 and can rotate relative to the outer ring 21, four guide blocks 221 which protrude outwards are arranged in the circumferential direction of the inner ring 22, each guide block 221 is provided with an arc-shaped surface 2211 which protrudes outwards in the radial direction at one end of the circumferential direction of the inner ring 22, and the distance between one end of each arc-shaped surface 2211 and the outer ring 21 gradually decreases, be provided with four location lug 3 on the outer loop 21, and four location lug 3 all cross on outer loop 21, outer loop 21 rotates and can drive all location lug 3 and remove along the arcwall face 2211 that corresponds, and at location lug 3 from arcwall face 2211 one end to the gliding in-process of arcwall face 2211 other end, the height that outer loop 21 was worn out to location lug 3 increases gradually.

The positioning bump 3 comprises a limiting part 31 and a protruding part 32 connected with the limiting part 31, the limiting part 31 can slide on the arc-shaped surface 2211, the protruding part 32 is connected with the outer ring 21 in a penetrating manner and can slide along the radial direction of the outer ring 21, in the process that the limiting part 31 slides from one end of the arc-shaped surface 2211 to the other end, the height of the protruding part 32 penetrating out of the outer ring 21 is gradually increased, the limiting part 31 can abut against the outer ring 21, the limiting part 31 slides along the arc-shaped surface 2211, the protruding part 32 is connected with the outer ring 21 in a penetrating manner, so that after the limiting part 31 slides into the arc-shaped surface 2211 from the outer peripheral surface of the inner ring 22, in the process that the protruding part 32 penetrates out of the outer ring 21 and slides from one end of the arc-shaped surface 2211 to the other end, the height of the protruding part 32 corresponding to the outer ring 21 is gradually increased, the pre-tightening force requirements of winding paper cores with different thicknesses are met, the positioning of the winding paper cores with different thicknesses is realized, and the bottom of the limiting part 31 is provided with an arc-shaped sliding block 311, the top of the protruding part 32 is provided with a plurality of anti-slip blocks 321, the arc-shaped sliding block 311 ensures that the sliding block 311 slides reliably on the arc-shaped surface 2211, and the plurality of anti-slip blocks 321 ensure that the positioning blocks 3 can reliably position the rolled paper core.

Each guide block 221 is provided with a guide groove 2212, the guide groove 2212 penetrates through the guide block 221 at two circumferential ends of the inner ring 22, four positioning columns 4 are fixed on the inner circumferential surface of the outer ring 21, each positioning column 4 is embedded in the corresponding guide groove 2212, the outer ring 21 is provided with a mounting hole 211 penetrating through the positioning column 4, an elastic part 5 is arranged in the mounting hole 211, the elastic part 5 is a spring, one end of the elastic part 5 is connected with a limiting part 6, the limiting part 6 is a limiting ball, the limiting part 6 is partially positioned in the mounting hole 211, the other part of the limiting part protrudes out of the outer circumferential surface of the outer ring 21, the other end of the elastic part 5 is connected with a positioning ball 10, the positioning ball 10 is abutted against the inner ring 22, the limiting part 6 can protrude out of the outer ring 21 under the action of the elastic part 5, the positioning ball 52 is abutted against the inner ring 22 under the action of the elastic force of the elastic part, one end of the elastic part 5 acts on the outer ring 21 through the limiting part 6, and the other end acts on the inner ring 22, the retaining location of inner ring 22 and outer loop 21 is realized to the messenger after rotating, under the effect of elastic component 5, locating part 6 can be along radially stretching out and drawing back, make the height difference of locating part 6 protrusion outer loop 21 outer peripheral face, guaranteed the prepositioning to the rolling refill of different thickness, guide way 2212 runs through guide block 221 at the both ends of inner ring 22 circumference and has guaranteed the distance that reference column 4 removed in guide way 2212, locating part 6 is spacing ball, when making cup joint different rolling refills, make the rolling refill can follow a rolling sleeve 2 and remove to fix a position on the adjacent rolling sleeve 2.

Be provided with the fender ring 212 that a plurality of stopped the spacing ball that corresponds on the outer peripheral face of outer ring 21, keep off ring 212 and mounting hole 211 interference fit, and every spacing ball part wears out and keeps off ring 212, keeps off ring 212 and is convenient for realize the installation of elastic component 5, spacing ball and location ball 10, keeps off ring 212 and realizes stopping the restriction to spacing ball, and spacing ball part is worn out and is kept off ring 212 and realize the prepositioning to the rolling refill.

The setting of 1 cavity of axis body, the circumference of axis body 1 has the mounting groove 11 that the 1 length direction of a plurality of edge axis body set up, a plurality of mounting groove 11 all is linked together with 1 inside of axis body, all be provided with ejection strip 7 in every mounting groove 11, the inside of axis body 1 is provided with can be with a plurality of ejection strip 7 to the outer convex gasbag 8 of mounting groove 11, gasbag 8 is connected with the air pump, aerify through gasbag 8 and make gasbag 8 with the equal ejection mounting groove 11 of a plurality of ejection strip 7 and inner ring 22 tight fit, the realization is to the location of inner ring 22, it is firm to make the inner ring 22 location.

The top stay 7 is made of felt, and the reliability of positioning of the inner ring 22 is ensured by the felt-made top stay 7.

The winding paper cores with different thicknesses are respectively arranged on a plurality of winding sleeves 2 arranged on a shaft body 1, a limiting part 6 on each winding sleeve 2 is respectively abutted with the corresponding winding paper core to realize pre-positioning, one winding paper core is rotated to drive the corresponding outer ring 21 to rotate, the outer ring 21 drives a plurality of corresponding positioning lugs 3 to move, a limiting part 31 of each positioning lug 3 enters an arc-shaped surface 2211 from the outer peripheral surface of an inner ring 22 and slides from one end of the arc-shaped surface 2211 to the other end of the arc-shaped surface 2211, the height of a protruding part 32 penetrating out of the outer ring 21 is gradually increased, the protruding part 32 is abutted with the corresponding winding paper core, the protruding part 32 realizes proper pre-tightening force on the winding paper core, one end of an elastic part 5 is matched to act on the limiting part 6, the other end acts on a positioning ball 10, the inner ring 22 and the outer ring 21 are kept in limiting, and the positioning on the corresponding winding paper core is realized, according to the above-mentioned step, can realize the location of other rolling covers to the rolling refill that corresponds respectively, rolling cover 2 of this application can be to the prepositioning of the rolling refill of different thickness through locating part 6, the rolling refill rotates, the rolling refill drives outer loop 21 and rotates, spacing portion 31 slides to the arcwall 2211 other end from arcwall 2211 one end, the pretightning force requirement of the rolling refill to different thickness is satisfied in the bulge 32 wearing out outer loop 21 outer peripheral face crescent, thereby realize the location requirement to the rolling refill of different thickness, set up a plurality of rolling cover 2 on axis body 1, thereby can satisfy the rolling refill of different thickness and carry out the rolling of membrane simultaneously.

Meanwhile, because the reflective film can have errors within the precision requirement range or the reflective film can have local precision difference in the production process, the thickness difference exists in the produced reflective film, so when the reflective film is cut into a plurality of cut reflective film sub-rolls, the reflective film can have different winding tensions in the axial direction by adopting the existing winding roller due to the thickness difference factor of the reflective film, the over-tightening of some reflective film sub-rolls during winding can damage the reflective quality of the reflective film, the over-loosening of some reflective film sub-rolls during winding can loosen the winding, a plurality of winding sleeves 2 of the reflective film winding device adopt an independent mode to be sleeved on the shaft body 1, when each winding sleeve 2 carries out the winding of the reflective film, because the outer ring 21 can rotate relative to the inner ring 22, namely the outer ring 21 can rotate forward and reversely relative to the inner ring 22, when the winding sleeve 2 is wound, the outer ring 21 can rotate relative to the inner ring 22 to adjust the winding tightness in a self-adaptive mode when the reflection film is too loose or too tight due to the thickness difference, so that the winding quality of the reflection film in a split winding mode is guaranteed.

Example two

The structure of this embodiment is basically the same as that of the first embodiment, except that the elastic member 5 is a wave-shaped elastic sheet, and two ends of the elastic sheet are respectively connected with the positioning ball 10 and the limiting member 6.

EXAMPLE III

This embodiment is the same basically with the structure of embodiment one, and the difference lies in, locating part 6 is the stopper, and locating part 6 includes the projection and the dog that links to each other with the projection, and fender ring 212 is worn out to the projection, dog and fender ring 212 looks butt, and elastic component 5 is connected with the dog, and under the effect of elastic component 5 elastic force, the projection can realize the prepositioning to different thickness rolling refill.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. A slip roller comprises a shaft body (1) and is characterized in that the shaft body (1) is sleeved with a plurality of rolling sleeves (2), the rolling sleeves (2) are attached to each other in pairs, each rolling sleeve (2) comprises an outer ring (21) and an inner ring (22) which is positioned in the outer ring (21) and can rotate relative to the outer ring (21), the inner ring (22) is tightly assembled on the shaft body (1), the outer ring (21) is circumferentially provided with a plurality of positioning lugs (3) which can slide along the radial direction, the inner ring (22) is circumferentially provided with a plurality of guide blocks (221) which protrude outwards, the guide blocks (221) are provided with arc-shaped surfaces (2211), the arc-shaped surfaces (2211) protrude outwards in the radial direction, and when the outer ring (21) rotates relative to the inner ring (22), the inner ring (22) pushes the positioning lugs (3) outwards through the arc-shaped surfaces (2211) to enable the outer ends of the positioning lugs (3) to protrude out of the outer ring (21), the outer ring (21) is provided with a plurality of limiting pieces (6) which can stretch and contract along the radial direction and protrude out of the outer peripheral surface of the outer ring (21).

2. A slip roller according to claim 1, wherein the arc-shaped surfaces (2211) are located at one ends of the guide blocks (221) in the circumferential direction of the inner ring (22), and the distance between one end to the other end of each arc-shaped surface (2211) and the outer ring (21) is gradually reduced.

3. A slip roller according to claim 1 or 2, characterised in that the positioning lug (3) comprises a limiting portion (31) and a projection (32) connected to the limiting portion (31), the limiting portion (31) is slidable on the arc-shaped surface (2211), the projection (32) is threaded on the outer ring (21) and is slidable in the radial direction of the outer ring (21), and the limiting portion (31) is capable of abutting against the outer ring (21).

4. A slip roller according to claim 3, characterized in that the bottom of the limiting part (31) has a sliding block (311) in the shape of an arc, and the top of the protruding part (32) has a plurality of anti-slip protrusions (321).

5. The slip roller as claimed in claim 1 or 2, wherein each guide block (221) is provided with a guide groove (2212), the inner circumferential surface of the outer ring (21) is fixed with a positioning column (4) and each positioning column (4) is embedded in the corresponding guide groove (2212), the outer ring (21) is provided with a mounting hole (211) penetrating through the positioning column (4), an elastic member (5) is arranged in the mounting hole (211), one end of the elastic member (5) is connected with a limiting member (6), the limiting member (6) is partially positioned in the mounting hole (211), the other part of the elastic member protrudes out of the outer circumferential surface of the outer ring (21), and the other end of the elastic member acts on the inner ring (22).

6. A slip roller according to claim 5, characterised in that the guide groove (2212) penetrates the guide block (221) at both ends of the inner ring (22) in the circumferential direction.

7. A slip roller according to claim 5, characterised in that the resilient member (5) is a spring, and that the other end of the resilient member (5) is connected to a positioning ball (10), the positioning ball (10) abutting against the inner ring (22).

8. The slip roller according to claim 7, wherein the position-limiting members (6) are position-limiting balls, the outer circumferential surface of the outer ring (21) is provided with a plurality of retaining rings (212) for retaining the corresponding position-limiting balls, and each position-limiting ball partially penetrates through the retaining rings (212).

9. The slip roller according to claim 1 or 2, characterized in that two ends of the shaft body (1) are sleeved with limiting sleeves (9), two limiting sleeves (9) are positioned on the shaft body (1) through fasteners, and a plurality of rolling sleeves (2) are positioned between the two limiting sleeves (9).

10. The slip roller according to claim 1 or 2, characterized in that the shaft body (1) is hollow, the shaft body (1) is circumferentially provided with a plurality of mounting grooves (11) arranged along the length direction of the shaft body (1), the mounting grooves (11) are communicated with the inside of the shaft body (1), each mounting groove (11) is internally provided with a supporting strip (7), and the inside of the shaft body (1) is provided with an air bag (8) which can enable the supporting strips (7) to protrude out of the mounting grooves (11).

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