A guide isolation bearing for welding bellows

Abstract

The present invention relates to the technical field of welding bellows accessories, and specifically discloses a guide isolation bearing for welding bellows, which has several guide parts fixed in a bearing ring, wherein a slide column is provided in the guide part, and a roller is provided at the centripetal end of the slide column; a drive ring is provided in the bearing ring, and the drive ring can drive all slide columns to move synchronously along the radial direction of the bearing ring; a seating part is provided on the outer side of the bearing ring, wherein a screw and a sleeve are provided in the seating part, and the sleeve is connected to the drive ring in a transmission manner, a screw is provided at one end of the screw, and a tool hole is provided on the seating part, and a connecting part is provided on the front and rear ends of the bearing ring. When the guide isolation bearing moves along the inner shaft, the roller rolls along the outer wall of the inner shaft, which can significantly reduce the movement resistance of the guide isolation bearing, alleviate the axial force of the welding bellows, and effectively reduce the wear rate between the guide isolation bearing and the inner shaft. The guide isolation bearing has a self-centering function, and the distance between the roller and the center axis of the bearing ring is adjustable, and can be applied to inner shafts of different outer diameters.

Description

Technical Field

[0001] The invention relates to the technical field of welding bellows accessories, in particular to a guide isolation bearing for welding bellows. Background Art

[0002] As an elastic element that combines high-precision sealing and motion transmission functions, welding bellows plays an irreplaceable role in high-end manufacturing fields such as aerospace, vacuum equipment, and precision instruments. In long-stroke motion scenarios, welding bellows usually adopt a segmented structural design and cooperate with the inner shaft for telescopic motion. The multi-section bellows assembly is sealed and connected by a spacer ring to form a welding bellows product that can meet the needs of long-stroke motion. The spacer ring and the inner shaft form a kinematic pair. When the welding bellows telescopes, the spacer ring moves along the inner shaft, providing support and guidance for the welding bellows, ensuring the motion stability of the welding bellows. Existing spacers are usually simple disc-shaped structures that adopt a sliding fit with the inner or outer shaft. In practical applications, there are certain shortcomings. On the one hand, the system dynamic performance is poor, which is specifically manifested in the nonlinear growth of friction resistance with accumulated stroke. This not only increases the energy consumption of the drive system, but also generates metal particles due to continuous wear, accelerating the degradation of the mating surface roughness, forming a vicious cycle, and ultimately causing a surge in motion resistance and an exponential decrease in guiding accuracy. On the other hand, the rigid matching between the spacer ring and the inner shaft severely restricts the system compatibility. The fixed size design of the inner diameter of the spacer ring can only be adapted to an inner shaft of a single specification. When faced with inner shafts of different diameters or manufacturing deviations, non-standard spacer rings must be customized, which not only leads to increased inventory management costs, but also limits the potential of modular design. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the present invention provides a guide isolation bearing for a welded bellows. By arranging a roller to contact and fit with the inner shaft, rolling friction replaces the previous sliding friction, thereby reducing the running resistance and the wear rate of the mating surface; at the same time, the roller adopts an adjustable structural design to improve the compatibility of the guide isolation bearing so that it can be suitable for inner shafts of different outer diameters.

[0004] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0005] The invention relates to a guide isolation bearing for a welding bellows, comprising a bearing ring, wherein at least three guide parts are fixed in the bearing ring, a slide column that can slide radially along the bearing ring is slidably connected in the guide part, and a roller is rotatably connected to the centripetal end of the slide column, and all rollers are rotationally symmetrically distributed along the central axis of the bearing ring, and the central axes of the roller and the bearing ring are perpendicular to each other; a driving pin is fixed on the slide column, and the driving ring is rotatably connected to the driving ring inside the bearing ring, and an arc groove that cooperates with the driving pin is provided on the driving ring; when the driving ring rotates, the arc groove cooperates with the driving pin to drive all the slide columns to move synchronously along the radial direction of the bearing ring; a placement part is fixed on the outer side of the bearing ring, a screw is rotatably connected to the placement part, and a screw sleeve with threaded cooperation is provided on the screw sleeve, which is transmission-connected to the driving ring; one end of the screw is provided with a screwing part, and a tool hole is provided on the placement part, and a sealing plug is provided on the tool hole; the front end face and the rear end face of the bearing ring are provided with a connecting part, and after the two welding bellows are connected through the bearing ring, the connecting ends of the two welding bellows are only connected to the outside through the tool hole.

[0006] In a preferred embodiment, the guide portion is distributed at equal angles along the central axis of the bearing ring, a guide groove is provided on the guide portion, and the guide portion is slidingly connected to the sliding column through the guide groove; a wheel seat is provided at the centripetal end of the sliding column, and the roller is rotatably connected to the wheel seat.

[0007] In a preferred embodiment, a placement chamber is provided inside the bearing ring and the placement portion, and the guide portion, the screw, the screw sleeve and the drive ring are located in the placement chamber; a detachable end plate is sealed and fixed to one end of the bearing ring;

[0008] Furthermore, two first shaft seats for placing the two ends of the screw are fixed in the placement bin, and two second shaft seats facing the first shaft seats are fixed on the end plate. The two first shaft seats are buckled with the two second shaft seats to support and limit the two ends of the screw.

[0009] In a preferred embodiment, a non-slip rubber layer is provided on the wheel surface of the roller.

[0010] In a preferred embodiment, a traction arm is fixed on one side of the screw sleeve, a traction pin is fixed on the traction arm, the traction pin extends along the axial direction of the bearing ring, a traction groove is provided on the drive ring, the traction pin extends into the traction groove and the two are slidably fitted.

[0011] In a preferred embodiment, four guide portions are provided.

[0012] In a preferred embodiment, one end of the sealing plug inserted into the tool hole is fixedly connected with a plug-in portion. When the sealing plug is sealed and fixedly connected to the tool hole, the plug-in portion is plug-fitted with the screwing portion and the two cannot rotate relative to each other.

[0013] In a preferred embodiment, a sliding sleeve is provided on the screw sleeve, and the sliding sleeve and the screw sleeve cannot rotate relative to each other. A thrust spring is provided on the screw sleeve and abuts against one end of the sliding sleeve. The sliding sleeve is in transmission connection with the drive ring. When the screw is rotated to drive the slide column to move centripetally, the screw sleeve provides thrust to the sliding sleeve via the thrust spring.

[0014] Furthermore, a guide block is provided on the screw sleeve, and a sliding groove that slides with the guide block is provided in the placement portion.

[0015] Compared with the prior art, the guide isolation bearing for welded bellows in the present invention has the following beneficial technical effects:

[0016] 1. When the guide isolation bearing moves along the inner shaft, the roller rolls along the outer wall of the inner shaft, which can significantly reduce the movement resistance of the guide isolation bearing, alleviate the axial force of the welded bellows, and effectively reduce the wear rate between the guide isolation bearing and the inner shaft as well as the operating energy consumption of the drive system.

[0017] 2. This guide isolation bearing has a self-centering function. The distance between the roller and the center axis of the bearing ring can be adjusted using tools such as a screwdriver and a hexagonal wrench. This allows the guide isolation bearing to match inner shafts with different outer diameters, thereby improving applicability.

[0018] 3. In the structure adopted by this guide isolation bearing, the components are arranged inside the bearing ring and the placement part, and only one tool hole is retained to communicate with the outside world, so that the structure of this guide isolation bearing can easily achieve the expected sealing performance to ensure the sealing after the two welded bellows are connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] Figure 1 Schematic diagram of the structure of the guide isolation bearing in the embodiment.

[0021] Figure 2 Schematic diagram of the structure of the guide isolation bearing in another direction in the embodiment.

[0022] Figure 3 Schematic diagram of the exploded parts of the guide isolation bearing in the embodiment.

[0023] Figure 4 Schematic diagram of the structure inside the guide isolation bearing in the embodiment.

[0024] Figure 5 Schematic diagram of the matching structure of the screw and the screw sleeve in the embodiment.

[0025] Figure 6 Schematic diagram of the structure of the end cover in the embodiment.

[0026] Figure 7 This is a schematic diagram of the status when using tools to adjust the roller position.

[0027] Figure 8 This is a schematic diagram of the welded bellows after being connected via a guide isolation bearing.

[0028] Figure 9 Schematic diagram of the matching structure of the sealing plug, tool hole, plug-in portion and screwing portion in the embodiment.

[0029] Figure 10 Schematic diagram of the matching structure of the screw, screw sleeve, sliding sleeve and thrust spring in the embodiment.

[0030] Figure 11 Schematic diagram of the installation of the screw, screw sleeve, sliding sleeve and thrust spring inside the placement part in the embodiment.

[0031] In the figure, 1, connecting part, 2, end plate, 3, bearing ring, 4, sealing plug, 5, tool hole, 6, placement part, 7, wheel seat, 8, roller, 9, placement bin, 10, guide groove, 11, guide part, 12, screw, 13, screw sleeve, 14, slide column, 15, arc groove, 16, traction groove, 17, drive ring, 18, drive pin, 19, traction arm, 20, screwing part, 21, traction pin, 22, first shaft seat, 23, second shaft seat, 24, plug-in part, 25, guide block, 26, sleeve, 27, thrust spring, 28, slide groove. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See Figures 1-8As shown, the present invention discloses a guide isolation bearing for a welded bellows, which includes an annular bearing ring 3, wherein at least three guide portions 11 are fixed in the bearing ring 3, wherein the guide portions 11 are distributed at equal angles along the central axis of the bearing ring 3, and a guide groove 10 is provided on the guide portion 11, wherein a slide post 14 is slidably connected in the guide groove 10, wherein the slide post 14 can slide radially along the bearing ring 3, and a wheel seat 7 is provided at the centripetal end of the slide post 14, wherein a roller 8 is rotatably connected to the wheel seat 7, and all rollers 8 are rotated along the central axis of the bearing ring 3. The roller 8 and the bearing ring 3 are symmetrically distributed, and the central axis of the roller 8 and the bearing ring 3 are perpendicular. A driving pin 18 extending axially along the bearing ring 3 is fixed on the slide column 14. A driving ring 17 is rotatably connected inside the bearing ring 3. The driving ring 17 can rotate along the central axis of the bearing ring 3. An arc groove 15 is provided on the driving ring 17, which matches the driving pin 18 one by one. The driving pin 18 extends into the corresponding arc groove 15 and slides together. When the driving ring 17 rotates, the arc groove 15 cooperates with the driving pin 18 to drive all the slide columns 14 along the axis. The bearing ring 3 moves synchronously in radial direction, thereby driving the driving ring 17 to rotate in different directions, so as to adjust the distance between the roller 8 and the central axis of the bearing ring 3; the outer side of the bearing ring 3 is fixedly connected to the placement part 6, and the placement part 6 is rotatably connected to the screw 12, and the screw 12 is provided with a screw sleeve 13 with a threaded fit, and the screw sleeve 13 is transmission-connected to the driving ring 17; when the screw 12 rotates in one direction, the screw sleeve 13 moves axially along the screw 12 and drives the driving ring 17 to rotate in the corresponding direction; one end of the screw 12 is provided with a screw Part 20, the screwing part 20 is used to cooperate with tools such as a screwdriver and a hexagonal wrench. A tool hole 5 is opened on one side of the placement part 6, and tools such as a screwdriver and a hexagonal wrench can pass through the tool hole 5 and cooperate with the screwing part 20 to drive the screw 12 to rotate; a detachable sealing plug 4 is provided on the tool hole 5; the front end face and the rear end face of the bearing ring 3 are provided with a connecting part 1 for sealing and fixed connection with the welding bellows. After the two welding bellows are connected through the bearing ring 3, the connecting ends of the two welding bellows are communicated with the outside world only through the tool hole 5.

[0034] This guide isolation bearing can seal and connect multiple shorter sections of welding bellows, creating a welding bellows product that meets long-stroke requirements. As the welding bellows expands and contracts, the guide isolation bearing moves along the inner shaft, providing guidance and support for the bellows. As the guide isolation bearing moves along the inner shaft, roller 8 rolls along the outer wall of the inner shaft, significantly reducing the guide isolation bearing's resistance to movement, alleviating the axial stress on the welding bellows and effectively reducing the wear rate between the guide isolation bearing and the inner shaft, as well as the operating energy consumption of the drive system.

[0035] This guide isolation bearing has a self-centering function. The distance between all rollers 8 and the central axis of the bearing ring 3 can be synchronously adjusted using tools such as screwdrivers and hexagonal wrenches, thereby making this guide isolation bearing adaptable to inner shafts of different outer diameters, thereby improving applicability.

[0036] In the structure adopted by the present guide isolation bearing, the transmission component associated with the roller 8 is arranged inside the bearing ring 3 and the placement part 6, and only a tool hole 5 for inserting the tool is retained to communicate with the outside world. This not only ensures the adjustability of the guide isolation bearing, but also ensures the airtightness of the internal space of the guide isolation bearing, thereby improving the sealing after the welding bellows is connected.

[0037] See Figures 1-6 As shown, in a specific implementation, a placement chamber 9 is provided inside the bearing ring 3 and the placement portion 6, and the guide portion 11, the screw 12, the screw sleeve 13 and the drive ring 17 are located in the placement chamber 9; a detachable end plate 2 is sealed and fixed to one end of the bearing ring 3, and after removing the end plate 2, the internal components of the bearing ring 3 and the placement portion 6 can be disassembled or repaired; accordingly, the corresponding connecting portion 1 is located on the end plate 2;

[0038] Furthermore, the bearing ring 3, the placement portion 6 and the guide portion 11 are an integrated structure;

[0039] Furthermore, two first shaft seats 22 for placing the two ends of the screw 12 are fixed in the placement bin 9, and two second shaft seats 23 facing the first shaft seats 22 are fixed on the end plate 2. The two first shaft seats 22 are engaged with the two second shaft seats 23 to support and limit the two ends of the screw 12; thereby facilitating the assembly of the screw 12 and its associated components.

[0040] In a preferred embodiment, an anti-slip rubber layer (not shown) is provided on the wheel surface of the roller 8. With the help of the elasticity of the anti-slip rubber layer, the contact stability between the roller 8 and the inner shaft can be improved, the generation of sliding friction can be reduced, and the wear rate of the mating surface between the roller 8 and the inner shaft can be reduced.

[0041] In the present invention, the screw sleeve 13 is connected to the drive ring 17 by transmission, and can be implemented based on a common transmission mechanism such as a rack and pinion transmission mechanism or a connecting rod mechanism in the prior art. Figure 3 、 Figure 7 As shown, a traction arm 19 is fixed to one side of the screw sleeve 13, and a traction pin 21 is fixed to the traction arm 19. The traction pin 21 extends along the axial direction of the bearing ring 3. The drive ring 17 is provided with a traction groove 16, and the traction pin 21 extends into the traction groove 16 and the two slide together. Therefore, when the screw sleeve 13 moves along the axial direction of the screw rod 12, the traction pin 21 drives the drive ring 17 to rotate through the traction groove 16. The traction pin 21 slides with the traction groove 16 to adapt to the relative position changes of the screw sleeve 13 and the drive ring 17.

[0042] In a preferred embodiment, four guide portions 11 are provided, and correspondingly, four rollers 8 are also provided.

[0043] like Figure 9 As shown, in a preferred embodiment, one end of the sealing plug 4 that is inserted into the tool hole 5 is fixedly connected to a plug-in portion 24. When the sealing plug 4 is sealed and fixedly connected to the tool hole 5, the plug-in portion 24 plugs into and mates with the screwing portion 20, and the two cannot rotate relative to each other. For example, the screwing portion 20 is a socket that can be plugged into and mate with a tool, and the plug-in portion 24 can be inserted into the socket, and the two cannot rotate relative to each other. Thus, the sealing plug 4 can provide a certain locking effect for the screw 12, preventing the screw 12 from rotating unexpectedly due to external forces such as reaction force and vibration, thereby improving the stability of the guide isolation bearing's working state.

[0044] See Figure 10 、 Figure 11 As shown, in a preferred embodiment, a sleeve 26 capable of axial sliding is provided on the sleeve 13, and limiting steps are provided at both ends of the sleeve 13 to prevent the sleeve 26 from slipping off the sleeve 13. The sleeve 26 and the sleeve 13 cannot rotate relative to each other, and a thrust spring 27 is installed on the sleeve 13 to abut against one end of the sleeve 26; the sleeve 26 is in transmission connection with the drive ring 17; when the screw rod 12 is rotated to drive the slide column 14 to move centripetally, the sleeve 13 provides thrust to the sleeve 26 through the thrust spring 27. Thus, based on the elasticity of the thrust spring 27, all rollers 8 can be kept in a tensioned state with the outer side of the inner shaft, thereby improving contact stability, and buffering the vibration of the internal parts of the guide isolation bearing during operation, so as to avoid unexpected rotation of the screw rod 12, and further improve the stability of the guide isolation bearing during operation;

[0045] Furthermore, a guide block 25 is provided on the screw sleeve 13, and a sliding groove 28 is provided in the placement portion 6 to slide with the guide block 25; during operation, the guide block 25 cooperates with the sliding groove 28 to prevent the screw sleeve 13 from rotating, and at the same time, since the sliding sleeve 26 is connected to the drive ring 17 for transmission, the sliding sleeve 26 cannot rotate; thereby, it can be ensured that the sliding sleeve 26 and the screw sleeve 13 cannot rotate relative to each other, so as to achieve the expected transmission purpose. At the same time, the sliding sleeve 26 can adopt a cylindrical structure to improve the ease of implementation of the matching structure between the screw sleeve 13 and the sliding sleeve 26.

Claims

1. A guide isolation bearing for a welded bellows, comprising a bearing ring, characterized in that: At least three guide parts are fixed in the bearing ring, and a sliding column that can slide radially along the bearing ring is slidably connected in the guide part, and a roller is rotatably connected to the centripetal end of the sliding column, and all rollers are rotationally symmetrically distributed along the central axis of the bearing ring, and the central axes of the roller and the bearing ring are perpendicular to each other; a driving pin is fixed on the sliding column, and a driving ring is rotatably connected inside the bearing ring, and an arc groove that cooperates with the driving pin is provided on the driving ring; when the driving ring rotates, the arc groove cooperates with the driving pin to drive all sliding columns to move synchronously along the radial direction of the bearing ring; a seating part is fixed on the outer side of the bearing ring, and a screw is rotatably connected inside the seating part, and a screw sleeve with threaded cooperation is provided on the screw, and the screw sleeve is transmission-connected to the driving ring; a screw part is provided at one end of the screw, and a tool hole is provided on the seating part, and a sealing plug is provided on the tool hole; the front end face and the rear end face of the bearing ring are provided with a connecting part The wheel assembly is designed to be rotated with the wheel hub, and the rotation of the wheel hub is arranged on the wheel hub of the wheel hub, and the rotation of the wheel hub is carried out according to the change of the wheel hub rotation.

2. The guide isolation bearing for welding bellows according to claim 1, characterized in that: A placement chamber is provided inside the bearing ring and the placement portion, and the guide portion, screw rod, screw sleeve and drive ring are located in the placement chamber; a detachable end plate is sealed and fixed to one end of the bearing ring.

3. The guide isolation bearing for welding bellows according to claim 2, characterized in that: Two first shaft seats for placing the two ends of the screw are fixed in the placement bin, and two second shaft seats facing the first shaft seats are fixed on the end plate. The two first shaft seats are buckled with the two second shaft seats to support and limit the two ends of the screw.

4. The guide isolation bearing for welding bellows according to claim 1, characterized in that: An anti-skid rubber layer is provided on the wheel surface of the roller.

5. The guide isolation bearing for welding bellows according to claim 1, characterized in that: There are four guide parts.

6. The guide isolation bearing for welding bellows according to claim 1, characterized in that: One end of the sealing plug inserted into the tool hole is fixedly connected with a plug-in portion. When the sealing plug is sealed and fixedly connected to the tool hole, the plug-in portion is plugged into and matched with the screwing portion and the two cannot rotate relative to each other.

7. The guide isolation bearing for welding bellows according to claim 1, characterized in that: A guide block is provided on the screw sleeve, and a sliding groove which is slidably matched with the guide block is provided in the placement portion.

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