CN223133793U - Expansion shaft - Google Patents
Expansion shaftInfo
- Publication number
- CN223133793U CN223133793U CN202422502592.9U CN202422502592U CN223133793U CN 223133793 U CN223133793 U CN 223133793U CN 202422502592 U CN202422502592 U CN 202422502592U CN 223133793 U CN223133793 U CN 223133793U
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- China
- Prior art keywords
- shaft
- wedge
- expansion
- shaft seat
- tensioning
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Abstract
本实用新型公开了一种胀紧轴，包括轴体框架和涨紧组件，涨紧组件承载于轴体框架内，涨紧组件包括位于轴体框架内部的芯轴丝杆、嵌入轴体框架并沿芯轴丝杆轴线周向均布的若干楔形涨紧块、套设在芯轴丝杆上的旋转轮、约束在楔形涨紧块上并在楔形涨紧块回落时促使其自动回位的复位件，轴体框架包括布置在轴体框架两端的轴座机构、连接两端轴座机构并沿芯轴丝杆轴线周向均布的若干支杆，芯轴丝杆上设有与楔形涨紧块配合的若干圆锥块。通过上述技术方案，提供了一种能够旋转调节轴径，且轴径调节范围大，可以实现自锁，制造工艺简单的简易胀紧轴。
The utility model discloses a tensioning shaft, including a shaft frame and a tensioning assembly, the tensioning assembly is carried in the shaft frame, the tensioning assembly includes a mandrel screw located inside the shaft frame, a plurality of wedge-shaped tensioning blocks embedded in the shaft frame and evenly distributed along the axis of the mandrel screw, a rotating wheel sleeved on the mandrel screw, a reset member constrained on the wedge-shaped tensioning block and causing the wedge-shaped tensioning block to automatically return to its position when the wedge-shaped tensioning block falls back, the shaft frame includes a shaft seat mechanism arranged at both ends of the shaft frame, a plurality of support rods connecting the shaft seat mechanisms at both ends and evenly distributed along the axis of the mandrel screw, and a plurality of conical blocks cooperating with the wedge-shaped tensioning blocks are provided on the mandrel screw. Through the above technical scheme, a simple tensioning shaft is provided which can adjust the shaft diameter by rotation, has a large shaft diameter adjustment range, can realize self-locking, and has a simple manufacturing process.
Description
Technical Field
The utility model relates to an expanding shaft, and belongs to the technical field of winding and unwinding.
Background
The expansion shaft is a mechanical part for connecting and fixing objects, realizes connection through expansion or expansion, is usually arranged on some machines, realizes fixation of a material roll and maintains the fixation state of the material roll through controllable increase and decrease of the shaft diameter, and is convenient for discharging the material roll when needed, thereby realizing the fixation and rotation structure of the material roll on the machines. Because of the characteristics of quick and accurate coiled material control, easy operation and maintenance, the production efficiency can be improved, the material waste can be reduced, and the method has wide application in industrial production.
According to the different working principles and structures, the expansion shaft can be divided into different types, including a mechanical expansion shaft and an air expansion shaft, wherein the mechanical expansion shaft realizes connection through expansion or expansion, has the characteristics of simple connection and convenient disassembly and assembly, and has specific structural forms aiming at different application scenes. The inflatable shaft realizes power transmission by using expansion and contraction of gas, when the gas is heated and expanded, a certain pressure is generated, the pressure can be used for driving other mechanical equipment, and when the gas is cooled and contracted, the original pressure is also reduced, so that the control and regulation of power are realized.
The traditional inflatable shaft at present provides constant tension, the tension cannot be adjusted according to the actual requirement of a coiled material, the material is unevenly coiled, the end face is not neat, raw materials are wasted, the manufacturing process is complex, the problems of eccentricity, insufficient roundness, air bag damage, high noise and the like are easy to occur due to the limitation of the structure and principle of the traditional inflatable shaft, in addition, an air source is needed when the traditional inflatable shaft is used, and if air leaks in any place, the inflatable shaft cannot work normally.
When the conventional air expansion shaft is used for collecting a belt material for rewinding in production, the air expansion shaft is used for supporting the inner wall of the material extrusion winding drum core to fix and clamp the winding end winding drum core, specifically, an air chamber is arranged in the air expansion shaft, compressed air is filled into the air chamber through an external air source, so that the air pressure in the air chamber is increased, the shaft body of the air expansion shaft is expanded to be in contact with a coiled material and provide enough friction force to fix the coiled material, and when the coiled material is required to be released, the air pressure in the air chamber is reduced, and the shaft body is contracted, so that the coiled material is released. Therefore, an additional air source and an air cylinder element are needed, the equipment cost and the volume are improved, the structure is complex, and the disassembly and the repair are not easy to carry out.
Disclosure of utility model
In order to solve the problems and the defects existing in the prior art, the utility model aims to provide a simple expansion shaft which can rotate and adjust the shaft diameter, has a large shaft diameter adjusting range, can realize self-locking and is simple in manufacturing process.
In order to achieve the purpose, the utility model provides the scheme that the expansion shaft 1 comprises a shaft body frame 2 and an expansion assembly 3, the expansion assembly 3 is carried in the shaft body frame 2, the expansion assembly 3 comprises a mandrel screw rod 31, a plurality of wedge-shaped expansion blocks 32, rotating knurled nuts 33 and reset pieces 34, the mandrel screw rod 31 is embedded in the shaft body frame 2 and uniformly distributed along the axis of the mandrel screw rod 31, the rotating knurled nuts 33 are sleeved on the mandrel screw rod 31, the reset pieces 34 are restrained on the wedge-shaped expansion blocks 32, and the reset pieces are driven to automatically reset when the wedge-shaped expansion blocks 32 fall back, the shaft body frame 2 comprises shaft seat mechanisms arranged at two ends of the shaft body frame 2, a plurality of support rods 21 are connected with the shaft seat mechanisms at two ends and uniformly distributed along the axis of the mandrel screw rod 31, and the mandrel screw rod 31 is provided with a plurality of cone blocks 35 matched with the wedge-shaped expansion blocks 32.
According to the technical scheme, when the knurled nut 33 rotates clockwise, the axis of the spindle screw 31 moves to drive the conical surface 351 of the conical block 35 to be matched with the wedge-shaped tensioning block 32, so that the wedge-shaped tensioning block 32 is jacked outwards, the shaft diameter is increased, the reset piece 34 restrained on the wedge-shaped tensioning block 32 can generate reverse acting force on the wedge-shaped tensioning block 32, when the knurled nut 33 rotates anticlockwise, the spindle screw 31 drives the conical block 35 to move backwards, the wedge-shaped tensioning block 32 starts to fall back, and automatic shrinkage reset is achieved under the reverse acting force of the reset piece 34, in the scheme, the reset piece 34 is restrained on the periphery of the wedge-shaped tensioning block 32, so that the wedge-shaped tensioning block 32 can obtain larger reset space, and a larger shaft diameter adjusting range is achieved.
The above solution is further provided in that the return element 34 is an elastic endless belt.
By adopting the technical scheme, when the wedge-shaped tensioning block 32 is jacked up by the conical block 35, the reset piece 34 is in a stretching state, and when the mandrel screw rod 31 drives the conical block 35 to move back, the wedge-shaped tensioning block 32 automatically falls back and contracts under the action of the pull force of the reset piece 34 restrained on the surface of the wedge-shaped tensioning block 32.
The above scheme is further provided that the wedge-shaped tensioning block 32 is an integral body, and the conical block 35 is matched with the integral body.
By adopting the technical scheme, the wedge-shaped tensioning block 32 is jacked up by the conical block 35, and the force acting on the wedge-shaped tensioning block 32 is balanced, so that the expanding process of the wedge-shaped tensioning block 32 is more stable.
The above proposal is further provided that the resetting pieces 34 are uniformly distributed on the axis of the spindle screw 31.
By adopting the technical scheme, after the plurality of resetting pieces 34 are uniformly arranged on the axial direction of the mandrel screw rod 31, the pulling force acting on the wedge-shaped tensioning block 32 is balanced, so that the contraction process of the wedge-shaped tensioning block 32 is more stable. The above scheme is further provided that the wedge-shaped tensioning block 32 is provided with a side wall clamping groove 321 matched with the resetting piece 34.
By adopting the technical scheme, the resetting piece 34 generates reduced tension due to deformation so as to tightly clamp the wedge-shaped tensioning block 32, and the mode has good stability and is convenient to install and disassemble.
The proposal is further provided that the shaft seat mechanism comprises an adjusting shaft seat 22 and a fixed shaft seat 23 which are fixedly connected with the two ends of the supporting rod, the adjusting shaft seat 22 is matched with a rotary knurled nut 33, and the fixed shaft seat 23 is provided with a coupling mechanism.
By adopting the technical scheme, when the knurled nut is rotated, the mandrel screw rod can be driven to move back and forth along the axial direction of the mandrel screw rod.
The utility model has the advantages that:
the expansion shaft 1 comprises a shaft body frame 2 and an expansion assembly 3, wherein a reset piece 34 is restrained on the periphery of a wedge-shaped expansion block 32, so that the wedge-shaped expansion block 32 obtains a larger reset space to realize a larger shaft diameter adjusting range, when the wedge-shaped expansion block 32 is jacked by a conical block 35, the reset piece 34 is in a stretching state, when a mandrel screw 31 drives the conical block 35 to move backwards, the wedge-shaped expansion block 32 automatically falls and contracts under the action of the pull force of the reset piece 34 restrained on the surface of the mandrel screw 31, and further, a plurality of reset pieces 34 are arranged on the axial direction of the mandrel screw 31 to enable the pull force acting on the wedge-shaped expansion block 32 to be more uniform, so that the stability of the expansion and contraction process of the wedge-shaped expansion block 32 is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic structural view of the shaft frame of the present utility model;
FIG. 3 is a schematic view of the construction of the tensioning assembly of the present utility model;
FIG. 4 is a schematic cross-sectional view of the present utility model;
FIG. 5 is a schematic exploded view of the structure of the present utility model;
Wherein, 1-expansion shaft and 2-shaft body frame. The device comprises a 3-tensioning assembly, a 21-supporting rod, a 22-adjusting shaft seat, a 23-fixing shaft seat, a 31-mandrel screw rod, a 32-wedge-shaped tensioning block, a 33-rotating knurled nut, a 34-resetting piece, a 35-conical block, a 211-tensioning gap, a 221-friction surface, a 321-side wall clamping groove and a 351-conical surface.
Detailed Description
The utility model is further illustrated by the following examples:
Example 1:
As shown in fig. 1, the expanding shaft 1 of the present utility model comprises a shaft body frame 2 and an expanding assembly 3.
As shown in fig. 2, the shaft body frame 2 includes a shaft seat mechanism and a plurality of struts 21 circumferentially arranged along the axis of the expanding shaft 1 and connected with the shaft seat mechanisms at both ends, the shaft seat mechanism includes an adjusting shaft seat 22 and a fixing shaft seat 23 fixedly connected with both ends of the plurality of struts 21 by bolts, and the shaft body frame 2 further includes an expanding gap 211 formed by the cooperation of the shaft seat mechanism and the struts 21 and matched with the wedge-shaped expanding block 32.
The specific position indicated by the expanding gap 211 is a gap formed between the plurality of struts 21, and the wedge-shaped expanding block 32 is placed in the gap and cooperates with the clamped article, the reset element 34 and the conical block 35 to complete the expanding and contracting process.
As shown in fig. 3, the tensioning assembly 3 includes a mandrel screw 31 disposed on an internal axis of the shaft body frame 2, a plurality of wedge tensioning blocks 32 embedded in the shaft body frame and circumferentially arranged along the axis of the mandrel screw, a rotary knurled nut 33 sleeved on the mandrel screw, a reset piece 34 restrained on the wedge tensioning blocks, a plurality of conical blocks 35 disposed on the mandrel screw 31 and matched with the wedge tensioning blocks 32, side wall clamping grooves 321 disposed on the wedge tensioning blocks 32, and conical surfaces 351 disposed on the conical blocks and matched with the wedge tensioning blocks 32.
It should be noted that, the conical blocks 35 may be set in plurality according to actual requirements, and the conical blocks 35 are uniformly distributed on the axis of the spindle screw rod 31, so that the force acting on the wedge-shaped tensioning block 32 is relatively balanced, and the situation that the wedge-shaped tensioning block is blocked, broken or single-side tilted to be separated from the expanding gap 211 due to the overturning moment is avoided, so that the expanding process of the wedge-shaped tensioning block 32 is more stable (the situation of setting the conical blocks 35 is not shown in the figure).
As shown in fig. 4, the restoring member 34 is two annular bands constrained in the sidewall clamping groove 321 of the wedge-shaped tensioning block 32, and the conical block 35 is fixedly connected with the spindle screw 31 through a nut. The endless belt may be made of an elastic material such as urethane rubber (TPU), elastomer (TPE), thermoplastic vulcanizate (TPV), styrene-butadiene rubber (SBR), etc., and may be used as the endless belt.
It should be noted that, the resetting pieces 34 may be set in plurality according to actual requirements, and the resetting pieces 34 are uniformly distributed on the axis of the spindle screw rod 31, so that the tension acting on the wedge-shaped tensioning block 32 is relatively balanced, and the situation that the wedge-shaped tensioning block is blocked, broken or single-side tilted to be separated from the expanding gap 211 due to the overturning moment is avoided, so that the expanding and contracting process of the wedge-shaped tensioning block 32 is more stable (the situation of setting the resetting pieces 34 is not shown in the figure).
As shown in fig. 5, the rotating knurled nut 33 is always subjected to the axial force transmitted by the spindle screw 31 from the deformation of the annular band and is in contact engagement with the friction surface 221 of the adjustment shaft seat 22.
When the utility model is implemented, more supporting rods and wedge-shaped tensioning blocks can be added according to the requirement, so that the supporting rods and the wedge-shaped tensioning blocks are circumferentially and uniformly distributed on the shaft body frame, and the contact area between the tensioning shaft and the material roll is increased.
The working principle of the utility model is as follows:
When the knurled nut 33 rotates clockwise, the spindle screw 31 moves to drive the conical surface 351 of the conical block 35 to be matched with the wedge-shaped tensioning block 32 to jack the wedge-shaped tensioning block 32 outwards, the resetting piece 34 is in a stretching state, so that the increase of the shaft diameter is realized, the resetting piece 34 restrained on the wedge-shaped tensioning block 32 can generate reverse acting force on the wedge-shaped tensioning block 32 at the moment, when the knurled nut 33 rotates anticlockwise, the spindle screw 31 drives the conical block 35 to move backwards, anticlockwise rotation starts to fall back, and automatic shrinkage resetting can be realized under the reverse acting force of the resetting piece 34.
The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.
While the utility model has been described with reference to the preferred embodiments, it is not limited thereto, and various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (8)
1. The expansion shaft is characterized in that the expansion shaft (1) comprises a shaft body frame (2) and an expansion assembly (3);
The shaft body frame (2) comprises a shaft seat mechanism and a plurality of supporting rods (21), and the shaft seat mechanism comprises an adjusting shaft seat (22) and a fixed shaft seat (23);
The tensioning assembly (3) comprises a mandrel screw rod (31), a plurality of wedge-shaped tensioning blocks (32), a rotary knurled nut (33), a reset piece (34) and two conical blocks (35);
The supporting rod (21) is provided with a rising gap (211), the adjusting shaft seat (22) is provided with a friction surface (221), the wedge-shaped tensioning block (32) is provided with a side wall clamping groove (321), and the conical block is provided with a conical surface (351).
2. The expansion shaft according to claim 1, wherein the plurality of struts (21) are circumferentially arranged along the axis of the expansion shaft 1 and are connected with an adjusting shaft seat (22) and a fixing shaft seat (23) at two ends, the adjusting shaft seat (22) and the fixing shaft seat (23) are fixedly connected with the two ends of the plurality of struts (21) through bolts, the wedge-shaped tensioning blocks (32) are embedded into a shaft body frame and are uniformly distributed along the axis circumference of the mandrel screw (31), the reset pieces (34) are restrained in side wall clamping grooves (321) of the wedge-shaped tensioning blocks (32), and the conical blocks (35) are arranged on the axis of the mandrel screw (31) and are fixedly connected with the mandrel screw (31) through nuts.
3. The expansion shaft according to claim 2, characterized in that the return element (34) is two annular bands constrained in side wall clamping grooves (321) of the wedge-shaped tensioning block (32).
4. A tensioning shaft according to claim 3, characterized in that the number of wedge-shaped tensioning blocks (32) is six.
5. The expansion shaft according to claim 4, characterized in that the number of struts (21) is six.
6. The expansion shaft according to claim 5, characterized in that the expansion gap (211) is a structure which is matched with the wedge-shaped expansion block (32) by the shaft body frame (2) through the matching of the shaft seat mechanism and the six supporting rods (21).
7. A tensioning shaft according to claim 6, characterized in that the friction surface (221) is the contact surface of the adjusting shaft seat (22) with the rotating knurled nut (33) subjected to the axial force transmitted by the spindle screw (31) from the deformation of the annular band.
8. The expansion shaft according to claim 7, characterized in that the shaft seat mechanism comprises an adjusting shaft seat (22) and a fixing shaft seat (23) which are fixedly connected to two ends of the supporting rod (21), the adjusting shaft seat (22) is matched with a rotary knurled nut (33), and the fixing shaft seat (23) is provided with a coupling mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422502592.9U CN223133793U (en) | 2024-10-15 | 2024-10-15 | Expansion shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422502592.9U CN223133793U (en) | 2024-10-15 | 2024-10-15 | Expansion shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223133793U true CN223133793U (en) | 2025-07-22 |
Family
ID=96425528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202422502592.9U Active CN223133793U (en) | 2024-10-15 | 2024-10-15 | Expansion shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223133793U (en) |
-
2024
- 2024-10-15 CN CN202422502592.9U patent/CN223133793U/en active Active
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