A multi-directional support cage for inner and outer tube bodies

Abstract

This invention discloses a multi-directional support retainer for inner and outer tubes, comprising an inner tube and an outer tube, which are coaxially supported by several multi-directional support retainers. Under support, the inner and outer tubes can rotate relative to each other. Each multi-directional support retainer includes a non-closed-loop, notched retainer that grips the outer tube. The outer ring of the retainer has several radially distributed support legs arranged in a circumferential array. A linkage system is provided on the multi-directional support retainer. Under the action of the linkage system, while the retainer tightens inward, the ends of each support leg move away from the retainer. The assembly process is simpler and requires no welding.

Description

Technical Field

[0001] This invention belongs to the field of inner and outer tube cages. Background Technology

[0002] Coaxial assembly structures of large inner and outer tubes are commonly found in large steam conveying, drum drying equipment, and food machinery. In inner and outer tube structures, the retaining structure used to maintain the coaxiality of the inner and outer tubes is generally called a cage. Existing cages are generally welded structures. Welded cages require welding technology in the manufacturing process, which requires operators to have high professional skills. At the same time, welded cages cannot realize the relative rotation function of the inner and outer tubes. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a multi-directional support cage for inner and outer tubes, which simplifies the assembly process and eliminates the need for welding.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a multi-directional support retainer for inner and outer tubes, comprising an inner tube and an outer tube, wherein the inner tube and the outer tube are coaxially supported by a plurality of multi-directional support retainers, and the inner tube and the outer tube can rotate relative to each other in the supported state; the multi-directional support retainer includes a non-closed-loop retaining ring with a notch, the retaining ring being disposed outside the inner tube, and the outer ring of the retaining ring being provided with a plurality of radially distributed support legs in a circumferential array; the multi-directional support retainer is provided with a linkage system, under the action of the linkage system, while the retaining ring performs an inward clamping action, the ends of each support leg move away from the retaining ring.

[0005] Furthermore, each support leg is equipped with a roller with an outer rim made of elastic material at its end, and the axis of each roller is parallel to the axis of the inner tube and the outer tube.

[0006] Furthermore, the support leg includes a leg sleeve with a rectangular cross-section and a movable leg body. The root of the sleeve is integrally connected to the outer ring of the retaining ring, and the movable leg body is movably fitted into the sleeve opening inside the sleeve along the length direction.

[0007] Furthermore, the retaining ring is a thin, sheet-like metal ring structure with a certain degree of elasticity.

[0008] Furthermore, a transmission ring is provided on the outer periphery of the retaining ring; each sleeve has a through groove extending radially along the retaining ring, and the transmission ring passes through the through groove on each sleeve; the outer ring surface of the transmission ring is integrally provided with a sloping protrusion at the position where it passes through the through groove on each sleeve, and the side of each sloping protrusion away from the retaining ring is a pushing sloping surface that smoothly transitions with the outer ring surface of the transmission ring, and each pushing sloping surface is in limiting contact with the end of the movable leg body inside the sleeve away from the roller.

[0009] Furthermore, a structural plate is vertically and integrally connected to the outer side of the counterclockwise end of the non-closed-loop notched ring, and the structural plate is provided with a hollow hole through which the transmission ring passes.

[0010] The inner contour of the transmission ring between the clockwise and counterclockwise ends of the non-closed-loop notched ring is provided with transmission teeth arranged along the arc contour; it also includes a gear that meshes with the transmission teeth, with an external hexagonal assist head fixedly connected coaxially to the end of the gear shaft, and a rope drum synchronously connected coaxially to the gear shaft; it also includes a taut steel wire rope, one end of which is fixedly connected to the clockwise end of the non-closed-loop notched ring, and the other end is fixedly connected to the bottom of the winding groove of the rope drum; a one-way bearing support is fixedly installed on the side of the structural plate near the transmission teeth, and the gear shaft is driven and fitted on the one-way bearing support through the one-way bearing.

[0011] Furthermore, a first constraint roller and a second constraint roller are rotatably mounted on both sides of the structural plate via a first roller bracket and a second roller bracket, respectively. Both the first constraint roller and the second constraint roller are in rolling contact with the outer ring surface of the transmission ring. The transmission ring rotates around its own axis under the combined constraint of the first constraint roller, the second constraint roller, and the gear.

[0012] Furthermore, rollers are mounted on the ends of each movable leg via roller seats; several elastic rubber pads are arranged in a circular pattern on the inner wall of the clasp.

[0013] Furthermore, the six support legs are respectively aligned with the six inclined protrusions on the transmission ring. Starting from the counterclockwise end of the transmission ring, the six inclined protrusions are, in clockwise order, the first inclined protrusion, the second inclined protrusion, the third inclined protrusion, the fourth inclined protrusion, the fifth inclined protrusion, and the sixth inclined protrusion. The steepness of the pushing slope on the first, second, third, fourth, fifth, and sixth inclined protrusions increases sequentially. This eliminates or suppresses the problem of inconsistent sliding distances of the support legs in the sleeve during "Step Two," making the inner and outer tubes tend to be coaxial under the support of the multi-directional support cage.

[0014] Furthermore, a working method for a multi-directional support cage for inner and outer tubes.

[0015] The multi-directional support cage is positioned smoothly between the coaxial inner and outer tubes in its initial state; then, the outer hexagonal assist head is slowly turned clockwise by a robotic arm or tool.

[0016] Beneficial effects: The multi-directional support cage of the present invention provides tight and stable coaxial support for the inner and outer tubes, and also enables relative rotation of the inner and outer tubes. In operation, it is only necessary to slowly turn the external hexagonal assist head to achieve the process in which the wheel surfaces of the rollers at the ends of each support leg are tightly and elastically pressed against the inner wall of the outer tube, while the elastic rubber pad on the inner side of the retaining ring tightly hugs the outer wall of the inner tube. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the inner and outer tubes assembled with coaxial support by a multi-directional support cage.

[0018] Figure 2 for Figure 1 Disassembly diagram;

[0019] Figure 3 This is an axial view of the assembly in its initial state.

[0020] Figure 4 This is a schematic diagram of a multi-directional support cage;

[0021] Figure 5 for Figure 4 Enlarged view of mark 28. Detailed Implementation

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] As attached Figures 1 to 5 The image shows a multi-directional support cage for inner and outer tubes, such as... Figure 1 and 2 The device includes an inner tube 2 and an outer tube 1. The inner tube 2 and the outer tube 1 are coaxially supported by several multi-directional support retainers 3, and can rotate relative to each other in the supported state. The multi-directional support retainer 3 includes a non-closed-loop retaining ring 11 with a notch, which is attached to the outside of the inner tube 2. The retaining ring 11 is a thin sheet-like metal ring structure with a certain elasticity. Several elastic rubber pads 14 are arranged in a circular array on the inner wall of the retaining ring 11. Several radially distributed support legs 41 are arranged in a circular array on the outer ring of the retaining ring 11. The multi-directional support retainer 3 is equipped with a linkage system. Under the action of the linkage system, while the retaining ring 11 performs an inward clamping action, the ends of each support leg 41 move away from the retaining ring 11.

[0024] like Figures 3 to 5 As shown, each support leg 41 has a roller 13 with an outer ring made of elastic material and rubber material at its end. The axis of each roller 13 is parallel to the axis of the inner tube 2 and the outer tube 1.

[0025] like Figure 5The support leg 41 shown includes a rectangular leg sleeve 10 and a movable leg body 8. The root of the sleeve 10 is integrally connected to the outer ring of the retaining ring 11. The movable leg body 8 is movably fitted into the sleeve opening 9 inside the sleeve 10 along its length. There is a certain friction between the movable leg body 8 and the inner wall of the sleeve opening 9 inside the sleeve 10, which is achieved through a slight interference fit to prevent the movable leg body 8 from falling off under gravity when facing downwards. The ends of each movable leg body 8 are rotatably mounted with rollers 13 via roller seats 12. The outer periphery of the retaining ring 11... A transmission ring 4 is provided; each sleeve 10 has a through groove 7 extending radially along the retaining ring 11, and the transmission ring 4 passes through the through groove 7 on each sleeve 10; the outer ring surface 4a of the transmission ring 4 is integrally provided with a sloping protrusion 5 at the position where it passes through the through groove 7 on each sleeve 10, and the side of each sloping protrusion 5 away from the retaining ring 11 is a pushing sloping surface 6 that smoothly transitions with the outer ring surface 4a of the transmission ring, and each pushing sloping surface 6 is in limiting contact with the end of the movable leg 8 inside the sleeve 10 away from the roller 13.

[0026] like Figure 4 A structural plate 23 is vertically and integrally connected to the outer side of the counterclockwise end of the non-closed-loop notched retaining ring 11. The structural plate 23 has a hollow hole 51 through which the transmission ring 4 passes. The inner contour of the transmission ring 4 between the clockwise and counterclockwise ends of the non-closed-loop notched retaining ring 11 is provided with transmission teeth 22 arranged along the arc contour. It also includes a gear 16 that meshes with the transmission teeth 22. The end of the gear shaft 26 of the gear 16 is coaxially fixedly connected to an external hexagonal assist head 27. A rope drum 24 is coaxially and synchronously connected to the gear shaft 26. It also includes a taut steel wire rope 21. One end of the steel wire rope 21 is fixedly connected to the clockwise end of the non-closed-loop notched retaining ring 11, and the other end is fixedly connected to the bottom of the winding groove 24.1 of the rope drum 24. A one-way bearing support 20 is fixedly installed on the side of the structural plate 23 near the transmission teeth 22. The gear shaft 26 is driven and engaged on the one-way bearing support 20 through a one-way bearing 25.

[0027] On both sides of the structural plate 23, a first constraint roller 15 and a second constraint roller 17 are rotatably mounted via a first roller bracket 19 and a second roller bracket 18, respectively. Both the first constraint roller 15 and the second constraint roller 17 roll into contact with the outer ring surface 4a of the transmission ring 4. The transmission ring 4 rotates around its own axis under the combined constraint of the first constraint roller 15, the second constraint roller 17 and the gear 16.

[0028] Working principle:

[0029] Step one: Position the inner tube 2 and outer tube 1 coaxially. Then, place the multi-directional support retainer 3, initially positioned, coaxially between the inner tube 2 and outer tube 1. In the initial state, the retaining ring 11 has not yet fully gripped the inner tube 2, and the wheel surfaces of the rollers 13 at the ends of each support leg 41 are not yet fully in contact with the outer tube 1. This allows the multi-directional support retainer 3 to be smoothly positioned between the coaxial inner tube 2 and outer tube 1 in the initial state. Figure 3 As shown.

[0030] Step two: Using a robotic arm or tool, slowly rotate the external hexagonal assist head 27 clockwise, causing the gear 16 and the rope drum 24 to rotate synchronously clockwise. Under the meshing action, the gear 16 drives the transmission ring 4 to rotate clockwise around its own axis, causing each pushing inclined surface 6 to gradually push the movable leg 8 outwards, bringing the wheel surfaces of the rollers 13 at the ends of each support leg 41 closer to the inner wall of the outer tube 1. The rotation of the rope drum 24 causes the wire rope 21 to gradually wind into the winding groove 24.1, thus gradually shortening the exposed length of the wire rope 21, and the retaining ring 1... The clockwise and counterclockwise ends of the outer tube 1 gradually approach each other under the pull of the gradually shortening exposed steel wire rope 21, thereby causing the retaining ring 11 to gradually tighten inward; until the wheel surfaces of the rollers 13 at the ends of each support leg 41 are tightly and elastically pressing against the inner wall of the outer tube 1, while the elastic rubber pads 14 on the inner side of the retaining ring 11 tightly hug the outer wall of the inner tube 2, and due to the presence of the one-way bearing 25, the gear 16 and the rope drum 24 cannot reverse, thereby achieving the coaxial tight and stable support of the multi-directional support retainer 3 for the inner tube 2 and the outer tube 1.

[0031] In the process described in "Step Two", the structural plate 23 is considered as a relatively stationary reference. As the clamping ring 11 tightens inward under the pull of the gradually shortening exposed steel wire rope 21, from the perspective of the axes of the inner tube 2 and outer tube 1, each support leg 41 will correspondingly shift clockwise. Furthermore, the clockwise shift of the support leg 41 further away from the structural plate 23 along the clamping ring 11 is greater, resulting in inconsistent relative rotation angles of the transmission ring 4 relative to each support leg 41 in "Step Two". If the steepness of the pushing slope 6 of the six inclined protrusions 5 on the transmission ring 4 is completely consistent, it will cause inconsistent sliding distances of each support leg 41 in the sleeve 9 during "Step Two". To counteract the problem of inconsistent sliding distances of each support leg 41 in the sleeve 9, the following structural arrangement is made:

[0032] like Figure 3The six support legs 41 are respectively aligned with the six inclined protrusions 5 on the transmission ring 4. Taking the counterclockwise end of the transmission ring 4 as the starting point, the six inclined protrusions 5 are, in clockwise direction, the first inclined protrusion 5.1, the second inclined protrusion 5.2, the third inclined protrusion 5.3, the fourth inclined protrusion 5.4, the fifth inclined protrusion 5.5, and the sixth inclined protrusion 5.6. The steepness of the pushing slope 6 on the first inclined protrusion 5.1, the second inclined protrusion 5.2, the third inclined protrusion 5.3, the fourth inclined protrusion 5.4, the fifth inclined protrusion 5.5, and the sixth inclined protrusion 5.6 increases sequentially. This eliminates or suppresses the problem of inconsistent sliding distance of each support leg 41 in the sleeve 9 during the process of "step two", so that the inner tube 2 and the outer tube 1 tend to be coaxial under the support of the multi-directional support retainer 3.

[0033] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A multi-directional support cage for inner and outer tubes, characterized in that: The device includes an inner tube (2) and an outer tube (1). The inner tube (2) and the outer tube (1) are coaxially supported by several multi-directional support retainers (3). Under the support state, the inner tube (2) and the outer tube (1) can rotate relative to each other. The multi-directional support retainer (3) includes a non-closed loop with a notch, which is attached to the outside of the inner tube (2). The outer ring of the loop (11) is arranged in a circular array with several radially distributed support legs (41). The multi-directional support retainer (3) is equipped with a linkage system. Under the action of the linkage system, while the loop (11) performs an inward clamping action, the ends of each support leg (41) move away from the loop (11). Each support leg (41) is equipped with a roller (13) with an outer ring made of elastic material at its end. The axis of each roller (13) is parallel to the axis of the inner tube (2) and the outer tube (1). The support leg (41) includes a leg sleeve (10) with a rectangular cross section and a movable leg body (8). The root of the sleeve (10) is integrally connected to the outer ring of the clasp (11), and the movable leg body (8) is movably fitted into the sleeve opening (9) inside the sleeve (10) along the length direction. The ring (11) is a thin sheet-like metal ring structure with a certain degree of elasticity; A transmission ring (4) is provided on the outer periphery of the retaining ring (11); each sleeve (10) has a through groove (7) extending radially along the retaining ring (11), and the transmission ring (4) passes through the through groove (7) on each sleeve (10); the outer ring surface (4a) of the transmission ring (4) is integrally provided with a sloping protrusion (5) at the position where it passes through the through groove (7) on each sleeve (10), and the side of each sloping protrusion (5) away from the retaining ring (11) is a pushing sloping surface (6) that smoothly transitions with the outer ring surface (4a) of the transmission ring, and each pushing sloping surface (6) is in limiting contact with the end of the movable leg (8) inside the sleeve (10) away from the roller (13); A structural plate (23) is vertically and integrally connected to the outer side of the counterclockwise end of the non-closed-loop notched ring (11). The structural plate (23) has a hollow hole (51) through which the transmission ring (4) passes. The inner contour of the transmission ring (4) between the clockwise and counterclockwise ends of the non-closed-loop notched ring (11) is provided with transmission teeth (22) arranged along the arc contour; it also includes a gear (16) meshing with the transmission teeth (22), and an external hexagonal booster head (27) is coaxially fixedly connected to the end of the gear shaft (26) of the gear (16), and a rope drum (24) is coaxially and synchronously connected to the gear shaft (26); it also includes a taut steel wire rope (21), one end of the steel wire rope (21) is fixedly connected to the clockwise end of the non-closed-loop notched ring (11), and the other end is fixedly connected to the bottom of the winding groove (24.1) of the rope drum (24); a one-way bearing support (20) is fixedly installed on the side of the structural plate (23) near the transmission teeth (22), and the gear shaft (26) is driven and engaged on the one-way bearing support (20) through the one-way bearing (25).

2. The multi-directional support cage for inner and outer tubes according to claim 1, characterized in that: The structural plate (23) has a first constraint roller (15) and a second constraint roller (17) rotatably mounted on both sides via a first roller bracket (19) and a second roller bracket (18). The first constraint roller (15) and the second constraint roller (17) are both in rolling engagement with the outer ring surface (4a) of the transmission ring (4). The transmission ring (4) rotates around its own axis under the combined constraint of the first constraint roller (15), the second constraint roller (17) and the gear (16).

3. The multi-directional support cage for inner and outer tubes according to claim 2, characterized in that: The ends of each of the movable leg bodies (8) are rotatably mounted with rollers (13) via roller seats (12); the inner wall of the clasp (11) is provided with a number of elastic rubber pads (14) arranged in a circular pattern.

4. The multi-directional support cage for inner and outer tubes according to claim 3, characterized in that: The six support legs (41) are respectively aligned with the six inclined protrusions (5) on the transmission ring (4). Taking the counterclockwise end of the transmission ring (4) as the starting point, the six inclined protrusions (5) in the clockwise direction are, in order, the first inclined protrusion (5.1), the second inclined protrusion (5.2), the third inclined protrusion (5.3), the fourth inclined protrusion (5.4), the fifth inclined protrusion (5.5), and the sixth inclined protrusion (5.6). The first inclined protrusion (5.1), the second inclined protrusion (5.2), the third inclined protrusion (5.3), the fourth inclined protrusion (5.4), the fifth inclined protrusion (5.5), and the sixth inclined protrusion (5.6). The steepness of the pushing slope (6) on the second, third, fourth, fifth, and sixth inclined protrusions (5.2, 5.3, 5.4, 5.5, and 5.6 increases sequentially; thereby eliminating or suppressing the problem of inconsistent sliding distance of each support leg (41) in the sleeve (9) during the process of "step two", so that the inner tube (2) and outer tube (1) tend to be coaxial under the support of the multi-directional support retainer (3).

5. The working method of the multi-directional support cage for inner and outer tubes according to claim 4, characterized in that: The multi-directional support cage (3) is smoothly positioned between the coaxial inner tube (2) and outer tube (1) in the initial state; then the outer hexagonal assist head (27) is slowly turned clockwise by a robot or tool.

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