Anti-falling rubber-coated roller and production process thereof

Abstract

The invention discloses an anti-falling rubber-coated roller and a production process thereof, and relates to the technical field of rubber-coated rollers. The rolling wheel comprises a rolling wheel body and a rubber coating layer arranged on the outer layer of the rolling wheel body, grooves are formed in the opposite sides of the rolling wheel body, a plurality of sliding grooves are formed in the grooves, elastic pieces are arranged in the sliding grooves in a sliding mode, locking pieces and limiting rods are arranged on the elastic pieces, and the locking pieces and the limiting rods are arranged on the rolling wheel body. Positioning holes which are the same as the sliding grooves in number and are communicated in a one-to-one correspondence mode are formed in the rubber coating layer, the limiting rods are matched with the positioning holes in an inserted connection mode, end covers are movably arranged in the grooves in an inserted mode, and the two end covers abut against and are in lap joint with the opposite sides of the rubber coating layer respectively. When the roller is used, through the cooperation effect of the limiting rods and the positioning holes, the rubber coating layer is limited, relative movement between the roller body and the rubber coating layer is avoided, secondary limiting is conducted on the rubber coating layer through the two end covers together, the rubber coating layer is further prevented from being separated from the roller body, normal use is guaranteed, and the roller is more practical.

Description

Technical Field

[0001] The present application relates to the technical field of rubber-coated rollers, and in particular to an anti-falling rubber-coated roller and a production process thereof. Background Art

[0002] Rubber-coated rollers are rollers with rubber or other elastic materials covering the outer layer of the roller. They are usually used in various equipment and machinery to provide better friction, cushioning and protection.

[0003] The existing public patent CN218177727U discloses a rubber-coated roller, including a rubber-coated layer, an inner wall of the rubber-coated layer is provided with a groove, a roller body, an outer wall of the roller body is provided with a protrusion, the groove matches the protrusion, and a bearing is sleeved on the inner wall of the roller body, and the groove provided on the inner wall of the rubber-coated layer and the protrusion on the outer wall of the roller body match and snap together, which helps to increase the combination stability of the rubber-coated layer and the roller body, thereby effectively increasing the durability of the rubber-coated roller. However, there are certain defects. Due to the lack of a limiting structure, relative movement is likely to occur between the roller body and the rubber-coated layer, which causes the rubber-coated layer to easily detach from the roller body, affecting normal use. Therefore, an anti-falling rubber-coated roller and a production process thereof are proposed. Summary of the invention

[0004] The purpose of the present application is to solve the technical problem that due to the lack of a limiting structure, relative movement is likely to occur between the roller body and the rubber coating, which causes the rubber coating to easily separate from the roller body and affect normal use. The present application provides an anti-falling rubber-coated roller and its production process.

[0005] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A rubber-coated roller with anti-falling function comprises a roller body and a rubber-coated layer arranged on its outer layer, the opposite sides of the roller body are constructed with grooves, a plurality of slide grooves are constructed in the grooves, an elastic member is slidably arranged in the slide grooves, a locking member and a limiting rod are arranged on the elastic member, the rubber-coated layer is constructed with positioning holes with the same number as the slide grooves and connected one-to-one, the limiting rod is plugged into and matched with the positioning holes, an end cover is movably inserted in the groove, the two end covers are respectively in contact with and overlap the opposite sides of the rubber-coated layer, a plurality of limiting grooves are constructed on the end covers, the locking member slidably cooperates with the limiting grooves, when the end covers rotate, the limiting grooves drive the locking member and the elastic member to slide back and forth synchronously, and the end covers are locked by the locking member, and a center hole is constructed on the roller body and the end covers.

[0006] Furthermore, the elastic member includes a slider slidably arranged in a slide groove, a guide rod penetrating the slider is arranged in the slide groove, a return spring sleeved on the guide rod is arranged between the slider and the slide groove, and the locking member and the limit rod are both arranged on the slider.

[0007] Furthermore, the locking member comprises a protrusion arranged on the sliding block, a clamping block is arranged at the free end of the protrusion, and a diameter of the clamping block is larger than a diameter of the protrusion.

[0008] Furthermore, the limiting groove includes a circular groove, a first strip groove and a second strip groove which are connected in sequence, an acute angle is formed between the first strip groove and the second strip groove, the diameter of the circular groove corresponds to the diameter of the block, the width of the first strip groove and the second strip groove are the same and both correspond to the diameter of the protrusion.

[0009] Furthermore, a limiting member is provided between the roller body and the rubber coating layer, which is used to limit the rubber coating layer.

[0010] Furthermore, the limiting member includes a plurality of dovetail blocks which are all arranged on the outer layer of the roller body, and the rubber coating layer is provided with dovetail grooves which are the same in number and correspond to the dovetail blocks, and the dovetail blocks are plug-fitted into the dovetail grooves.

[0011] Furthermore, the roller body and the end cover are both configured with a recessed hole connected to the center hole.

[0012] Furthermore, the end cover is constructed with movable grooves having the same number as the second strip grooves and connected one-to-one, a fixing block is arranged in the movable groove, and a locking portion is arranged on the fixing block to act on the protrusion and lock it.

[0013] Furthermore, the locking portion includes a limiting slide rod slidably arranged on the fixed block, a wedge block which abuts against and overlaps the protrusion is arranged at the free end of the limiting slide rod, and an extrusion spring sleeved on the limiting slide rod is arranged between the wedge block and the fixed block.

[0014] The production process of the anti-falling rubber-coated roller includes the following steps: S1: forming a roller body and a plurality of sliders by mold processing, forming a plurality of dovetail blocks on the outer layer of the roller body, forming two grooves, a center hole and a plurality of slide grooves on the roller body, forming a limit rod, a convex block and a clamping block on the slider, sleeve the slider and the return spring on the guide rod, and fix the limit rod in the slide groove; S2: forming a rubber coating layer by mold processing, so that a plurality of dovetail grooves and a plurality of positioning holes are formed on the rubber coating layer; S3: forming two end covers by mold processing, so that a center hole and a plurality of limiting grooves are formed on the end covers; S4: In step S1 and step S3, a concave hole connected to the central hole is formed on the roller body and the end cover, or a plurality of movable grooves are formed on the end cover, a fixed block is fixed in the movable groove, a limit slide rod is slidably installed on the fixed block, an extrusion spring is sleeved on the limit slide rod, and a wedge block is fixed on the free end of the limit slide rod; S5: The rubber layer is covered on the outer layer of the roller body, and multiple dovetail blocks are respectively inserted into multiple dovetail grooves, and multiple positioning holes are respectively connected with multiple slide grooves. Two end covers are respectively movably inserted into the two grooves, and the two end covers are respectively in contact with and overlapped with the opposite sides of the rubber layer. Multiple clamping blocks correspond to and pass through multiple circular grooves, respectively, to drive the end covers to rotate, and the protrusion first enters the first strip groove from the circular groove, drives the slider to slide and squeeze the reset spring, drives the limit rod to move and insert into the positioning hole, and then the reset spring is reset to a natural state, and the slider slides to an initial position, drives the protrusion from the first strip groove to the second strip groove, drives the limit rod to move in the positioning hole, and the end cover cannot withdraw from the groove, the limit rod cannot withdraw from the positioning hole, and the rubber layer cannot be separated from the roller body.

[0015] The beneficial effects of this application are as follows: When the present application is in use, the rubber layer is limited by the cooperation of the limiting rod and the positioning hole to avoid relative movement between the roller body and the rubber layer. The rubber layer is limited for a second time by the two end covers to further avoid the rubber layer from separating from the roller body, thereby ensuring normal use and being more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural stereogram of Embodiment 1 of the present application; Figure 2 It is a structural stereogram of the rubber coating layer of the present application; Figure 3 is a three-dimensional diagram of the end cover structure of the first embodiment of the present application; Figure 4 is a three-dimensional diagram of the main structure of the roller in the first embodiment of the present application; Figure 5 This application Figure 4 A three-dimensional cross-sectional view of Figure 6 This application Figure 5 The enlarged view of point A in the middle; Figure 7 is a structural stereogram of Embodiment 2 of the present application; Figure 8 This is a structural stereogram of Embodiment 3 of the present application; Fig. 9 This application Figure 8 Enlarged view of point B in the middle.

[0017] Figure numerals: 1. roller body; 2. rubber coating; 3. groove; 4. slide groove; 5. limit rod; 6. positioning hole; 7. end cover; 8. center hole; 9. slider; 10. guide rod; 11. reset spring; 12. protrusion; 13. clamping block; 14. circular groove; 15. first strip groove; 16. second strip groove; 17. dovetail block; 18. dovetail groove; 19. concave hole; 20. movable groove; 21. fixed block; 22. limit slide rod; 23. wedge block; 24. extrusion spring. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Example

[0019] like Figure 1-Figure 6 As shown, an anti-falling rubber-coated roller proposed in Example 1 of the present application includes a roller body 1 and a rubber-coated layer 2 arranged on its outer layer. The opposite sides of the roller body 1 are constructed with grooves 3, and a plurality of slide grooves 4 are constructed in the grooves 3. The slide grooves 4 are perpendicular to the axis of the roller body 1. The plurality of slide grooves 4 are distributed in a ring array. An elastic member is slidably arranged in the slide groove 4. The sliding direction of the elastic member is perpendicular to the axis of the roller body 1. A locking member and a limiting rod 5 are arranged on the elastic member. The locking member and the limiting rod 5 are fixed on the elastic member and are distributed vertically. The locking member is parallel to the axis of the roller body 1, and the limiting rod 5 is perpendicular to the axis of the roller body 1. The rubber-coated layer 2 is constructed with the same number of connecting rods as the slide grooves 4 and one-to-one corresponding to each other. The positioning hole 6 is perpendicular to the axis of the rubber coating 2, the limiting rod 5 is plugged into the positioning hole 6, and an end cover 7 is movably inserted in the groove 3. The two end covers 7 are respectively in contact with the opposite sides of the rubber coating 2. A plurality of limiting grooves are constructed on the end cover 7, and the plurality of limiting grooves are distributed in a ring array. The locking member and the limiting groove are slidably matched. When the end cover 7 rotates, the locking member and the elastic member are driven to slide back and forth synchronously through the limiting groove. The reciprocating sliding here means that the locking member and the elastic member first slide synchronously to the limit position, and then slide to the initial position, and the end cover 7 is locked by the locking member. The roller body 1 and the end cover 7 are both constructed with a center hole 8, and the center hole 8 is used for the shaft rod of the rubber-coated roller to pass through; In the initial state, the present application is divided into a plurality of relatively independent individuals, namely the roller body 1, the rubber coating 2 and the two end covers 7. The locking member and the elastic member are both located at the initial position and are both close to the axis of the roller body 1. The elastic member is in a natural state. The limiting rod 5 is retracted into the slide groove 4. During installation, the rubber coating 2 is covered on the outer layer of the roller body 1 so that the plurality of positioning holes 6 are respectively connected with the plurality of slide grooves 4. The two end covers 7 are respectively movably inserted into the two grooves 3. The two end covers 7 are respectively in contact with and overlapped with the opposite sides of the rubber coating 2 so that the locking member and the limiting groove are slidably matched. Then the end covers 7 are driven to rotate. When the end covers 7 rotate, the locking member and the elastic member are driven to slide synchronously through the limiting groove, and the lock is locked. The fixed piece and the elastic piece first slide synchronously to the limit position, the elastic piece is squeezed, and then the locking piece and the elastic piece slide synchronously to the initial position, the elastic piece tends to the natural state, the limiting rod 5 first extends out of the slide groove 4 and is inserted into the positioning hole 6, and then moves in the opposite direction in the positioning hole 6, and the end cover 7 is locked by the locking piece, the end cover 7 cannot be withdrawn from the groove 3, and the limiting rod 5 cannot be withdrawn from the positioning hole 6. When in use, the rubber layer 2 is limited by the cooperation of the limiting rod 5 and the positioning hole 6 to prevent relative movement between the roller body 1 and the rubber layer 2. The rubber layer 2 is limited for the second time by the two end covers 7 together, which further prevents the rubber layer 2 from being separated from the roller body 1, thereby ensuring normal use; In summary, when the present application is in use, the rubber layer 2 is limited by the cooperation of the limiting rod 5 and the positioning hole 6 to avoid relative movement between the roller body 1 and the rubber layer 2, and the rubber layer 2 is limited for a second time by the two end covers 7 to further avoid the rubber layer 2 from separating from the roller body 1, thereby ensuring normal use, and therefore more practical.

[0020] like Figure 6 As shown, in the first embodiment, the elastic member includes a slider 9 slidably arranged in the slide groove 4, a guide rod 10 penetrating the slider 9 is arranged in the slide groove 4, the guide rod 10 is fixed in the slide groove 4 and distributed along the length direction of the slide groove 4, a return spring 11 sleeved on the guide rod 10 is arranged between the slider 9 and the slide groove 4, and the locking member and the limit rod 5 are both arranged on the slider 9; Referring to the above, in the initial state, the slider 9 is in the initial position and the return spring 11 is in the natural state. When the end cover 7 rotates, the slider 9 first slides to the extreme position, the return spring 11 is squeezed, and then the return spring 11 returns to the natural state, and the slider 9 slides to the initial position.

[0021] like Figure 6 As shown, in the first embodiment, the locking member includes a protrusion 12 arranged on the slider 9, the protrusion 12 is fixed on the slider 9, the protrusion 12 is vertically distributed with the guide rod 10, and a clamping block 13 is arranged at the free end of the protrusion 12, the clamping block 13 is fixed at the free end of the protrusion 12, and the diameter of the clamping block 13 is larger than the diameter of the protrusion 12; Referring to the above, in the initial state, the protrusion 12 and the block 13 are both in the initial position. When the end cover 7 rotates, the protrusion 12 and the block 13 are driven to slide to the extreme position together through the limit groove, driving the slider 9 to slide to the extreme position, and the reset spring 11 is squeezed. Then the reset spring 11 is reset to a natural state, and the slider 9 slides to the initial position, driving the protrusion 12 and the block 13 to slide to the initial position together.

[0022] like Figure 3 As shown, in the first embodiment, the limiting groove includes a circular groove 14, a first strip groove 15 and a second strip groove 16 which are connected in sequence, the second strip groove 16 is perpendicular to the axis of the end cover 7, an acute angle is formed between the first strip groove 15 and the second strip groove 16, the diameter of the circular groove 14 corresponds to the diameter of the block 13, the width of the first strip groove 15 and the second strip groove 16 are the same and both correspond to the diameter of the protrusion 12; Referring to the above, when the end cover 7 is movably inserted into the groove 3, the block 13 corresponds to and passes through the circular groove 14, and the protrusion 12 is located in the circular groove 14. When the end cover 7 rotates, the protrusion 12 first enters the first strip groove 15 from the circular groove 14, and the protrusion 12 and the block 13 slide to the extreme position together, driving the slider 9 to slide to the extreme position, and the reset spring 11 is squeezed. Then the reset spring 11 is reset to a natural state, and the slider 9 slides to the initial position, driving the protrusion 12 from the first strip groove 15 to the second strip groove 16, and the protrusion 12 and the block 13 slide to the initial position together. At this time, the end cover 7 cannot withdraw from the groove 3, so as to achieve locking of the end cover 7.

[0023] like Figure 2-Figure 4 As shown, in the first embodiment, a limiting member is provided between the roller body 1 and the rubber coating 2, which is used to limit the rubber coating 2; Referring to the above, when the rubber layer 2 is covered on the outer layer of the roller body 1, the rubber layer 2 is limited by the limiting member, so that the multiple positioning holes 6 are respectively connected to the multiple slide grooves 4, which is more convenient to use. At the same time, the limiting member can further limit the rubber layer 2 to avoid relative movement between the roller body 1 and the rubber layer 2, thereby further preventing the rubber layer 2 from separating from the roller body 1.

[0024] like Figure 2-Figure 4 As shown, in the first embodiment, the stopper includes a plurality of dovetail blocks 17 which are all arranged on the outer layer of the roller body 1. The plurality of dovetail blocks 17 are all fixedly arranged on the outer layer of the roller body 1 and are distributed in a circular array. The rubber layer 2 is provided with dovetail grooves 18 which are the same in number and correspond to the dovetail blocks 17. The dovetail blocks 17 are plugged and matched with the dovetail grooves 18. Referring to the above, when the rubber coating 2 is covered on the outer layer of the roller body 1, the multiple dovetail blocks 17 are respectively inserted into the multiple dovetail grooves 18, so that the multiple positioning holes 6 are respectively connected with the multiple slide grooves 4. At the same time, the relative movement between the roller body 1 and the rubber coating 2 is avoided through the cooperation of the dovetail blocks 17 and the dovetail grooves 18. Example

[0025] Embodiment 2 is based on Embodiment 1 and further improves this application; like Figure 7 As shown, in the second embodiment, the roller body 1 and the end cover 7 are both provided with a recessed hole 19 connected to the center hole 8; Referring to the above, when in use, through the setting of the recessed hole 19, the shaft rod can drive the roller body 1 and the end cover 7 to rotate synchronously, thereby avoiding relative rotation between the end cover 7 and the roller body 1. Even if the slider 9 slides to the extreme position due to the centrifugal force, it can also ensure that the protrusion 12 will not enter the first strip groove 15 from the second strip groove 16, thereby ensuring that the end cover 7 will not withdraw from the groove 3, thereby improving the stability of use. Example

[0026] Embodiment 3 further improves this application on the basis of Embodiment 1; like Figure 8-Figure 9 As shown, in the third embodiment, the end cover 7 is configured with movable grooves 20 having the same number as the second strip grooves 16 and connected one-to-one, the movable grooves 20 are vertically distributed with the second strip grooves 16, a fixing block 21 is arranged in the movable groove 20, the fixing block 21 is fixed in the movable groove 20, and a locking portion is arranged on the fixing block 21 to act on the protrusion 12 and lock it; Referring to the above, when the protrusion 12 slides to the initial position, the protrusion 12 is locked by the locking part so that the protrusion 12 cannot slide, thereby preventing the slider 9 from sliding to the extreme position due to the centrifugal force, thereby ensuring that the end cover 7 will not withdraw from the groove 3, thereby improving the stability of use.

[0027] like Figure 8-Figure 9 As shown, in the third embodiment, the locking portion includes a limit slide bar 22 slidably arranged on the fixed block 21, the limit slide bar 22 slides along the length direction of the movable groove 20, the free end of the limit slide bar 22 is provided with a wedge block 23 that contacts and overlaps with the protrusion 12, the wedge block 23 is fixedly arranged at the free end of the limit slide bar 22, and an extrusion spring 24 sleeved on the limit slide bar 22 is arranged between the wedge block 23 and the fixed block 21; Referring to the above, in the initial state, the wedge block 23 and the limiting slide bar 22 are both in the initial position, the extrusion spring 24 is in the natural state, the wedge block 23 is located in the second strip groove 16, and when the protrusion 12 slides to the initial position, it first contacts and overlaps with the inclined surface of the wedge block 23, and through the transition effect of the inclined surface, the wedge block 23 and the limiting slide bar 22 are forced to move to the extreme position together, the extrusion spring 24 is squeezed, and then the extrusion spring 24 is restored to the natural state, the wedge block 23 and the limiting slide bar 22 move to the initial position together, the protrusion 12 and the plane of the wedge block 23 contact and overlap, and due to the obstruction of the wedge block 23, the protrusion 12 cannot slide, thereby locking the protrusion 12.

[0028] The present application also proposes a production process for an anti-falling rubber-coated roller, which is used to produce the above-mentioned anti-falling rubber-coated roller, comprising the following steps: S1: A roller body 1 and a plurality of sliders 9 are formed by mold processing, a plurality of dovetail blocks 17 are formed on the outer layer of the roller body 1, two grooves 3, a center hole 8 and a plurality of slide grooves 4 are formed on the roller body 1, a limit rod 5, a protrusion 12 and a clamping block 13 are formed on the slider 9, the slider 9 and the return spring 11 are both sleeved on the guide rod 10, and the limit rod 5 is fixed in the slide groove 4; S2: forming the rubber layer 2 by mold processing, so that a plurality of dovetail grooves 18 and a plurality of positioning holes 6 are formed on the rubber layer 2; S3: forming two end covers 7 by mold processing, so that a center hole 8 and a plurality of limiting grooves are formed on the end covers 7; S4: In step S1 and step S3, a concave hole 19 communicating with the center hole 8 is formed on the roller body 1 and the end cover 7, or a plurality of movable grooves 20 are formed on the end cover 7, a fixed block 21 is fixed in the movable groove 20, a limit slide bar 22 is slidably installed on the fixed block 21, a compression spring 24 is sleeved on the limit slide bar 22, and a wedge block 23 is fixed on the free end of the limit slide bar 22; S5: The rubber coating 2 is covered on the outer layer of the roller body 1, and multiple dovetail blocks 17 are respectively inserted into multiple dovetail grooves 18, and multiple positioning holes 6 are respectively connected with multiple slide grooves 4. Two end covers 7 are movably inserted into the two grooves 3, and the two end covers 7 are respectively in contact with and overlapped with the opposite sides of the rubber coating 2. Multiple blocking blocks 13 respectively correspond to and pass through multiple circular grooves 14, driving the end covers 7 to rotate, and the protrusion 12 first enters the first strip groove 15 from the circular groove 14, driving the slider 9 to slide and squeeze the reset spring 11, driving the limit rod 5 to move and insert into the positioning hole 6, and then the reset spring 11 is reset to a natural state, and the slider 9 slides to an initial position, driving the protrusion 12 from the first strip groove 15 to enter the second strip groove 16, driving the limit rod 5 to move in the positioning hole 6, the end cover 7 cannot withdraw from the groove 3, the limit rod 5 cannot withdraw from the positioning hole 6, and the rubber coating 2 cannot be separated from the roller body 1.

[0029] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anti-falling rubber-coated roller, comprising a roller body (1) and a rubber-coated layer (2) arranged on the outer layer thereof, characterized in that: The roller body (1) is provided with grooves (3) on opposite sides thereof, a plurality of slide grooves (4) are provided in the grooves (3), an elastic member is slidably arranged in the slide grooves (4), a locking member and a limiting rod (5) are provided on the elastic member, the rubber coating (2) is provided with positioning holes (6) the same number as the slide grooves (4) and connected one-to-one, the limiting rod (5) is plugged into and matched with the positioning holes (6), an end cover (7) is movably inserted into the grooves (3), the two end covers (7) are respectively in contact with and overlapped with the opposite sides of the rubber coating (2), a plurality of limiting grooves are provided on the end covers (7), the locking member slidably cooperates with the limiting grooves, when the end covers (7) rotate, the limiting grooves drive the locking member and the elastic member to slide back and forth synchronously, and the end covers (7) are locked by the locking member, and a center hole (8) is provided on the roller body (1) and the end covers (7).

2. The anti-falling rubber-coated roller according to claim 1, characterized in that: The elastic member comprises a slider (9) slidably arranged in the slide groove (4); a guide rod (10) penetrating the slider (9) is arranged in the slide groove (4); a return spring (11) sleeved on the guide rod (10) is arranged between the slider (9) and the slide groove (4); and the locking member and the limit rod (5) are both arranged on the slider (9).

3. The anti-falling rubber-coated roller according to claim 2, characterized in that: The locking member comprises a protrusion (12) arranged on the slider (9), a clamping block (13) being arranged at the free end of the protrusion (12), and a diameter of the clamping block (13) being larger than a diameter of the protrusion (12).

4. The anti-falling rubber-coated roller according to claim 3 is characterized in that: The limiting groove comprises a circular groove (14), a first strip groove (15) and a second strip groove (16) which are connected in sequence, an acute angle is formed between the first strip groove (15) and the second strip groove (16), the diameter of the circular groove (14) corresponds to the diameter of the clamping block (13), the width of the first strip groove (15) and the second strip groove (16) are the same and both correspond to the diameter of the protrusion (12).

5. The anti-falling rubber-coated roller according to claim 1, characterized in that: A limiting member is provided between the roller body (1) and the rubber coating (2), and is used to limit the position of the rubber coating (2).

6. The anti-falling rubber-coated roller according to claim 5, characterized in that: The limiting member comprises a plurality of dovetail blocks (17) which are all arranged on the outer layer of the roller body (1); the rubber coating layer (2) is provided with dovetail grooves (18) which are the same in number and correspond to the dovetail blocks (17); the dovetail blocks (17) and the dovetail grooves (18) are plug-fitted.

7. The anti-falling rubber-coated roller according to claim 1, characterized in that: The roller body (1) and the end cover (7) are both provided with a recessed hole (19) which is in communication with the central hole (8).

8. The anti-falling rubber-coated roller according to claim 4, characterized in that: The end cover (7) is provided with movable grooves (20) of the same number as the second strip grooves (16) and in one-to-one correspondence with each other. A fixing block (21) is arranged in the movable groove (20). The fixing block (21) is provided with a locking portion that acts on the protrusion (12) and locks it.

9. The anti-falling rubber-coated roller according to claim 8, characterized in that: The locking portion comprises a limiting slide bar (22) slidably arranged on a fixed block (21); a wedge block (23) abutting against and overlapping the protrusion (12) is arranged at a free end of the limiting slide bar (22); and a compression spring (24) sleeved on the limiting slide bar (22) is arranged between the wedge block (23) and the fixed block (21).

10. A production process for an anti-falling rubber-coated roller, used for producing an anti-falling rubber-coated roller as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: forming a roller body (1) and a plurality of sliders (9) by mold processing, forming a plurality of dovetail blocks (17) on the outer layer of the roller body (1), forming two grooves (3), a center hole (8) and a plurality of slide grooves (4) on the roller body (1), forming a limit rod (5), a protrusion (12) and a clamping block (13) on the slider (9), sleeve-mounting the slider (9) and the return spring (11) on the guide rod (10), and fixing the limit rod (5) in the slide groove (4); S2: forming a rubber coating layer (2) by mold processing, so that a plurality of dovetail grooves (18) and a plurality of positioning holes (6) are formed on the rubber coating layer (2); S3: forming two end covers (7) by mold processing, so that a center hole (8) and a plurality of limiting grooves are formed on the end covers (7); S4: In step S1 and step S3, a concave hole (19) communicating with the center hole (8) is formed on the roller body (1) and the end cover (7), or a plurality of movable grooves (20) are formed on the end cover (7), a fixed block (21) is fixed in the movable groove (20), a limit slide bar (22) is slidably mounted on the fixed block (21), a compression spring (24) is sleeved on the limit slide bar (22), and a wedge block (23) is fixed on the free end of the limit slide bar (22); S5: The rubber coating (2) is covered on the outer layer of the roller body (1), the plurality of dovetail blocks (17) are respectively inserted into the plurality of dovetail grooves (18), the plurality of positioning holes (6) are respectively connected to the plurality of slide grooves (4), the two end covers (7) are respectively movably inserted into the two grooves (3), the two end covers (7) are respectively in contact with the opposite sides of the rubber coating (2), the plurality of clamping blocks (13) respectively correspond to and pass through the plurality of circular grooves (14), the end covers (7) are driven to rotate, and the protrusions (12) first enter the first strip groove (15) from the circular groove (14) , driving the slider (9) to slide and squeeze the reset spring (11), driving the limit rod (5) to move and be inserted into the positioning hole (6), then the reset spring (11) is reset to a natural state, the slider (9) slides to an initial position, driving the protrusion (12) from the first strip groove (15) into the second strip groove (16), driving the limit rod (5) to move in the positioning hole (6), the end cover (7) cannot withdraw from the groove (3), the limit rod (5) cannot withdraw from the positioning hole (6), and the rubber layer (2) cannot be separated from the roller body (1).

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