Automatic reset mechanical manual expansion shaft

Abstract

The utility model discloses a mechanical manual expansion shaft capable of resetting automatically, which relates to the technical field of expansion shafts and comprises an expansion shaft shell, a sliding groove is arranged on the outer wall of the expansion shaft shell, a fixed flange shaft and a rotating flange are fixedly connected to two ends of the expansion shaft shell, bearings are arranged on the fixed flange shaft and the rotating flange, a main shaft is rotatably connected onto the bearings, and the main shaft is provided with a rotating shaft. One end of the main shaft is connected with a knob, the two sides of the main shaft are symmetrically connected with movable blocks, the movable blocks are slidably connected with circumferentially-arranged expansion tables, the expansion tables are slidably connected with the sliding grooves, pistons are arranged on the inner sides of the expansion tables, the middle of the main shaft is rotatably connected with a sliding ring device, and a piston cylinder is arranged on the sliding ring device; according to the device, the main shaft rotates to drive the movable blocks to move synchronously, the two ends of the movable blocks abut symmetrically to drive the expansion table to do expansion and contraction motion on the expansion shaft shell, the stability and bearing capacity of the device are improved, the piston and the piston cylinder can automatically drive the expansion table to reset, and the device is compact in structure, stable and reliable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of expansion shaft, concretely relates to a mechanical manual expansion shaft of automatic reset. BACKGROUND

[0002] The expansion shaft is also called the air expansion shaft, is a kind of equipment widely used in printing, papermaking, textile, packaging and other industries, mainly used for the winding and unwinding of paper, film, cloth and other roll materials. The working principle of expansion shaft is that the shaft body is inflated by inflating the air bag inside the shaft, so as to be closely combined with the inner wall of the object, and fixed. However, the expansion shaft needs high-pressure gas source, the structure is relatively complex, the use cost is higher, and the applicability is not high for the occasion with lower automation requirement, at this time, the mechanical manual expansion shaft is more suitable.

[0003] The patent with the application number 2011103708704 discloses a tile type manual expansion shaft, which comprises an expansion assembly, the expansion assembly comprises tiles, sliding blocks, channels, springs, support plates, screws, movable blocks, screw rods and pipe bodies, the support plate is fixedly connected to the outer wall of the channel, the spring is fixedly connected between the upper surface of the support plate and the top of the sliding block, and the tile is installed on the upper surface of the sliding block. The screw rod drives the movable block to push the sliding block to slide outward, so as to drive the tile to expand outward, and the spring is arranged to absorb and store vibration energy, so as to not only reduce the vibration amplitude of the tile, but also realize the automatic reset of the tile. However, the movable block and the sliding block in the expansion assembly of the device slide in contact on one side, which not only affects the expansion and contraction stability, but also reduces the bearing capacity, in addition, the spring occupies the space in the device, and the structure is complex, which is not conducive to the stability of the device. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a mechanical manual expansion shaft of automatic reset, improves the contraction stability and bearing capacity of the device, and solves the problems in the above background technology.

[0005] To achieve the above object, the specific technical scheme of the utility model is as follows:

[0006] A kind of mechanical manual expansion shaft of automatic reset, including expansion shaft shell, expansion shaft shell outer wall is opened with the sliding slot of circumferential distribution, expansion shaft shell both ends are fixedly connected with fixed flange shaft and rotating flange, the bearing is symmetrically arranged on the fixed flange shaft and rotating flange, the main shaft is rotatably connected on the bearing, the knob is connected to one end of the main shaft, the movable block is symmetrically connected on the both sides of the main shaft, the circumferential arrangement of expansion tight platform is slidably connected on the movable block, the expansion tight platform is slidably connected with the sliding slot, the piston is arranged in the expansion tight platform, the slip ring device is rotatably connected in the main shaft, the slip ring device includes slip ring, the uniform distribution of piston cylinder is arranged on the outer wall of slip ring, and the piston cylinder is one-to-one corresponding and cooperatively connected.

[0007] As a further setting of the above scheme, the main shaft includes a first threaded shaft and a second threaded shaft, a first connecting shaft is provided on the inner side of the first threaded shaft, a first fixed shaft segment is provided on the outer side of the first threaded shaft, a second connecting shaft is provided on the inner side of the second threaded shaft, a second fixed shaft segment is provided on the outer side of the second threaded shaft, and the first threaded shaft and the second threaded shaft are detachably connected through the first connecting shaft and the second connecting shaft.

[0008] As a further configuration of the above solution, the external threads of the first threaded shaft and the second threaded shaft have opposite rotation directions, and the first connecting shaft and the second connecting shaft are rotatably connected to the bearings.

[0009] As a further configuration of the above solution, the movable block is symmetrically connected to the first threaded shaft and the second threaded shaft, and a circumferentially distributed inclined groove is opened on the movable block, and the inclined groove points obliquely to the central axis of the main shaft.

[0010] As a further setting of the above scheme, the expansion platform includes an expansion fixing plate, which is slidably connected to the slide groove, and a positioning arc piece is fixedly connected to the outer side of the expansion fixing plate. The positioning arc piece is concentric with the expansion shaft shell, and wedge blocks are provided at both ends of the inner side of the expansion fixing plate, which are slidably connected to the inclined slide groove.

[0011] As a further configuration of the above scheme, a through groove is opened in the center of the slip ring, the slip ring is located between the first threaded shaft and the second threaded shaft and is rotatably connected to the first connecting shaft and the second connecting shaft, and a limiting ring is provided on the outside of the piston cylinder.

[0012] The utility model has the following beneficial effects:

[0013] The main shaft rotates to drive the movable blocks to move synchronously toward or relative to each other. The movable blocks slide in cooperation with the inclined slide and the wedge block, symmetrically contacting from both ends to drive the expansion table to expand and contract in the slide on the expansion shaft housing, thereby improving the expansion and contraction stability and bearing capacity of the device.

[0014] When the expansion table expands and contracts, the piston moves back and forth in the piston cylinder. When the movable blocks approach each other, the expansion table moves outward, and negative pressure is generated between the piston and the piston cylinder. When the movable blocks move away from each other, the negative pressure between the piston and the piston cylinder automatically drives the expansion table to reset. The structure is compact, stable and reliable, ensuring the normal operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the expansion shaft housing of the utility model;

[0017] Figure 3 This is a schematic diagram of the expansion assembly of the utility model;

[0018] Figure 4 This is a schematic diagram of the assembly of the spindle device and the movable block of the utility model;

[0019] Figure 5 This is a schematic diagram of the expansion slide key of the utility model;

[0020] Figure 6 It is a schematic diagram of the slip ring device of the present utility model.

[0021] 1. Expansion shaft housing; 2. Fixed flange shaft; 3. Rotating flange; 4. Bearing; 5. Main shaft; 6. Movable block; 7. Expansion table; 8. Slip ring device; 9. Positioning arc piece; 10. Knob; 101. Slide groove; 501. First threaded shaft; 5011. First connecting shaft; 5012. First fixed shaft section; 502. Second threaded shaft; 5021. Second connecting shaft; 5022. Second fixed shaft section; 601. Inclined slide groove; 701. Expansion fixing plate; 702. Wedge block; 703. Piston; 801. Slip ring; 8011. Through groove; 802. Piston cylinder; 8021. Limiting ring. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Figures 1 to 6 , and describes the application in detail with reference to embodiments.

[0024] like Figure 1 、 Figure 2 、 Figure 3As shown, a mechanical manual expansion shaft with automatic resetting is provided. A circumferentially distributed slide groove 101 is provided on the outer wall of the expansion shaft housing 1. A fixed flange shaft 2 and a rotating flange 3 are fixedly connected at both ends of the expansion shaft housing 1. Bearings 4 are symmetrically provided on the fixed flange shaft 2 and the rotating flange 3. A main shaft 5 is rotatably connected to the bearing 4. A knob 10 is connected to one end of the main shaft 5. Movable blocks 6 are symmetrically connected on both sides of the main shaft 5. A circumferentially arranged expansion platform 7 is slidably connected to the movable block 6. The expansion platform 7 is slidably connected to the slide groove 101. A piston 703 is provided on the inner side of the expansion platform 7. A slip ring device 8 is rotatably connected to the middle of the main shaft 5. The slip ring device 8 includes a slip ring 801. The outer wall of the slip ring 801 is provided with evenly distributed piston cylinders 802. The piston cylinder 802 corresponds to the piston 703 one by one and is matched and connected.

[0025] like Figure 4 As shown, the main shaft 5 includes a first threaded shaft 501 and a second threaded shaft 502, a first connecting shaft 5011 is provided on the inner side of the first threaded shaft 501, a first fixed shaft section 5012 is provided on the outer side of the first threaded shaft 501, a second connecting shaft 5021 is provided on the inner side of the second threaded shaft 502, and a second fixed shaft section 5022 is provided on the outer side of the second threaded shaft 502, the first threaded shaft 501 and the second threaded shaft 502 are detachably connected through the first connecting shaft 5011 and the second connecting shaft 5021, the rotation direction of the external threads of the first threaded shaft 501 and the second threaded shaft 502 are opposite, the first connecting shaft 501 and the second connecting shaft 502 are rotatably connected to the bearing 4, the movable block 6 is symmetrically connected to the first threaded shaft 501 and the second threaded shaft 502, and the movable block 6 is provided with circumferentially distributed inclined grooves 601, and the inclined grooves 601 are obliquely pointed to the central axis of the main shaft 5.

[0026] like Figure 5 、 Figure 6 As shown, the expansion platform 7 includes an expansion fixing plate 701, which is slidably connected to the slide groove 101, and a positioning arc piece 9 is fixedly connected to the outside of the expansion fixing plate 701. The positioning arc piece 9 is concentric with the expansion shaft housing 1, and wedge blocks 702 are provided at both ends of the inner side of the expansion fixing plate 701. The wedge blocks 702 are slidably connected to the inclined slide groove 601. A through groove 8011 is provided in the center of the slip ring 801. The slip ring 801 is located between the first threaded shaft 501 and the second threaded shaft 502 and is rotatably connected to the first connecting shaft 5011 and the second connecting shaft 5021. A limiting ring 8021 is provided on the outside of the piston cylinder 802 to prevent the piston 703 from loosening.

[0027] The working process of the present utility model is as follows: the knob 10 is rotated, and the knob 10 drives the main shaft 5 to rotate and drive the movable block 6 to move synchronously toward or relative to each other. The movable block 6 slides between the inclined groove 601 and the wedge block 702, and symmetrically abuts from both ends of the expansion platform 7 to drive the expansion platform 7 to expand and contract in the groove 101 on the expansion shaft housing 1. The expansion fixing plate 701 drives the positioning arc piece 9 to move, and the positioning arc piece 9 abuts against the inner wall of the object for fixation. When the expansion platform 7 expands and contracts, the piston 703 moves back and forth in the piston cylinder 802. When the movable blocks 6 approach each other, the expansion platform 7 moves outward, and negative pressure is generated between the piston 703 and the piston cylinder 802. When the movable block 6 is relatively far away, the negative pressure between the piston 703 and the piston cylinder 802 automatically drives the expansion platform 7 to reset, thereby realizing the automatic reset of the positioning arc piece 9.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

[0029] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A mechanical manual expansion shaft with automatic resetting, comprising an expansion shaft housing, an outer wall of which is provided with circumferentially distributed slide grooves, a fixed flange shaft and a rotating flange fixedly connected at both ends of the expansion shaft housing, bearings symmetrically provided on the fixed flange shaft and the rotating flange, a main shaft rotatably connected to the bearings, characterized in that: A knob is connected to one end of the main shaft, and movable blocks are symmetrically connected to both sides of the main shaft. The movable block is slidably connected to a circumferentially arranged expansion platform, and the expansion platform is slidably connected to the slide groove. A piston is provided on the inner side of the expansion platform. The middle of the main shaft is rotatably connected to a slip ring device, which includes a slip ring, and the outer wall of the slip ring is provided with evenly distributed piston cylinders. The piston cylinders correspond to the pistons one by one and are matched and connected.

2. The automatic reset mechanical manual expansion shaft according to claim 1, characterized in that: The main shaft includes a first threaded shaft and a second threaded shaft, a first connecting shaft is provided on the inner side of the first threaded shaft, a first fixed shaft section is provided on the outer side of the first threaded shaft, a second connecting shaft is provided on the inner side of the second threaded shaft, and a second fixed shaft section is provided on the outer side of the second threaded shaft, and the first threaded shaft and the second threaded shaft are detachably connected through the first connecting shaft and the second connecting shaft.

3. The automatic reset mechanical manual expansion shaft according to claim 2, characterized in that: The external threads of the first threaded shaft and the second threaded shaft have opposite rotation directions, and the first connecting shaft and the second connecting shaft are rotatably connected to the bearings.

4. The automatic reset mechanical manual expansion shaft according to claim 2, characterized in that: The movable block is symmetrically connected to the first threaded shaft and the second threaded shaft. The movable block is provided with circumferentially distributed inclined sliding grooves, and the inclined sliding grooves are obliquely directed to the central axis of the main shaft.

5. The automatic reset mechanical manual expansion shaft according to claim 2, characterized in that: The expansion platform includes an expansion fixing plate, which is slidably connected to the slide groove. A positioning arc piece is fixedly connected to the outer side of the expansion fixing plate. The positioning arc piece is concentric with the expansion shaft housing. Wedge blocks are provided at both ends of the inner side of the expansion fixing plate, and the wedge blocks are slidably connected to the inclined slide groove.

6. The automatic reset mechanical manual expansion shaft according to claim 2, characterized in that: A through groove is provided in the center of the slip ring. The slip ring is located between the first threaded shaft and the second threaded shaft and is rotatably connected to the first connecting shaft and the second connecting shaft. A limiting ring is provided on the outside of the piston cylinder.

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