Inner hole tensioning device

Abstract

The utility model provides an inner hole tensioning device. The inner hole tensioning device comprises a shell, a telescopic driving piece, a plurality of connecting rod assemblies and a plurality of extrusion blocks. The shell is of a long cylindrical structure, the shell is provided with a first end and a second end which are opposite to each other, and the first end is provided with a lifting hole; the telescopic driving piece is arranged at the second end, and the telescopic end of the telescopic driving piece is in sliding fit with the inner cavity of the shell along the long axis of the shell. The multiple connecting rod assemblies are evenly distributed around the periphery of the shell, and the transmission ends of the multiple connecting rod assemblies are connected with the telescopic end. And the plurality of extrusion blocks are respectively connected with the driven ends of the corresponding connecting rod assemblies. According to the inner hole tensioning device provided by the utility model, the mode of expanding the inner hole of the rotor is more stable, the inner hole of the rotor is tensioned by the plurality of extrusion heads, the stability of the rotor in the moving process is ensured, the moving difficulty is reduced, and the overall production efficiency of the rotor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotor press-fitting and testing, and in particular relates to an inner hole tensioning device. Background Art

[0002] With the rapid development of the energy storage industry, composite flywheel rotors have gradually emerged due to their advantage of high energy storage density. At present, the processing technology of composite flywheel rotors is immature and the defective rate has remained high. Until the application of multi-piece composite rotor interference assembly manufacturing technology, the product yield has been improved.

[0003] However, during the interference fit of the composite flywheel rotor, the flywheel rotor needs to be lifted for press fitting and testing. The composite flywheel rotor is heavy and difficult to lift. The preparation work before press fitting is time-consuming, resulting in low press fitting efficiency, which ultimately affects the production efficiency of the composite flywheel rotor. Utility Model Content

[0004] The embodiment of the utility model provides an inner hole tensioning device, which aims to solve the technical problem in the prior art that composite material rotors have a large weight and are difficult to lift, affecting production efficiency.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] Provided is an inner hole tensioning device, comprising:

[0007] The shell is an elongated cylindrical structure, the side wall of the shell is provided with a slideway extending along its long axis, the shell has a first end and a second end opposite to each other, and the first end is provided with a hanging hole;

[0008] A telescopic driving member is disposed at the second end, and the telescopic end of the telescopic driving member is slidably matched with the inner cavity of the shell along the long axis of the shell;

[0009] A plurality of connecting rod assemblies are evenly distributed around the outer circumference of the housing, and the transmission end of the connecting rod assembly is connected to the telescopic end; and

[0010] A plurality of extrusion blocks corresponding to the connecting rod assemblies are respectively connected to the driven ends of the corresponding connecting rod assemblies and can swing around the swing axis of the driven end under the drive of the connecting rod assembly, the swing axis is perpendicular to the telescopic movement path of the telescopic end, and the extrusion blocks can abut against the inner hole wall of the rotor.

[0011] In a possible implementation, a connecting plate is provided on the housing, a long axis of the connecting plate is perpendicular to a long axis of the housing, and the connecting rod assembly includes:

[0012] A transmission head, one end of which is connected to the telescopic end, and the other end of which passes through the shell and slides with the slideway along the long axis of the shell, and the transmission head forms the transmission end;

[0013] A first connecting rod, one end of which is hinged to the outlet end of the transmission head, and the axis of the hinge shaft is parallel to the swing axis;

[0014] A second connecting rod, one end of which is hinged to the other end of the first connecting rod, and the axis of the hinge shaft is parallel to the swing axis. The middle part of the second connecting rod is hinged to the connecting plate, and the axis of the hinge shaft forms the swing axis. The other end of the second connecting rod forms the driven end and is connected to the extrusion block.

[0015] In a possible implementation, one telescopic end is connected to a plurality of the transmission heads to drive the plurality of the extrusion blocks to move synchronously.

[0016] In a possible implementation, the telescopic end is provided with a connecting block, the outer periphery of the connecting block is slidably matched with the inner cavity of the shell, and the outer periphery of the connecting block is respectively connected to the plurality of transmission heads.

[0017] In a possible implementation, a mounting frame is provided at the first end, the mounting frame is provided with the hanging hole, the mounting frame is connected to the telescopic driving member, the mounting frame has a through hole, and the through hole is communicated with the inner cavity of the shell.

[0018] In a possible implementation, the mounting frame includes a first plate and a second plate that are perpendicular to each other, the second plate is connected to the first end, and the plate surface of the second plate is perpendicular to the axial direction of the shell; the central axis of the intersection of the first plate and the second plate overlaps with the axis of the shell; the second plate and / or the first plate is provided with a lifting ring, and the lifting ring forms the lifting hole.

[0019] In a possible implementation, a reaction force assembly is connected to the side of the mounting frame facing away from the first end, and the reaction force assembly includes a reaction force plate and a plurality of connecting rods. The reaction force plate is fixedly connected to the side of the telescopic drive member away from the first end, and the two ends of the connecting rod are respectively connected to the reaction force plate and the mounting frame, and the plurality of connecting rods are distributed around the telescopic path of the telescopic end.

[0020] In a possible implementation manner, a friction pad is provided on a side of the extrusion block away from the second connecting rod.

[0021] In a possible implementation, a mounting groove is formed on a side of the extrusion block facing away from the shell, the friction pad is embedded in the mounting groove, and the friction pad protrudes from a notch of the mounting groove.

[0022] In one possible implementation, a pin hole is provided on the extrusion block, the axis of the pin hole is perpendicular to the axis of the shell, a through hole is provided on the friction pad corresponding to the pin hole, and the extrusion block and the friction pad are fixedly connected by locking pins passing through the through hole and the pin hole respectively.

[0023] The inner hole tensioning device provided by the utility model provides an expansion structure compared with the prior art. When the telescopic end of the telescopic driving member moves, the transmission end of the transmission assembly is driven to move along the slideway, the transmission end and the driven end are transmission-connected, the driven end is connected to the extrusion block, and the swing of multiple driven ends drives the multiple extrusion blocks to swing toward one end away from the axis of the shell respectively. The circumferential path formed by the multiple extrusion blocks is expanded. When the shell extends into the inner hole of the rotor, the telescopic end moves, and finally drives the extrusion blocks to swing. The multiple extrusion blocks are respectively abutted against the inner hole of the rotor to expand the inner hole of the rotor to achieve relative fixation of the rotor and the device. At this time, the rotor can be lifted by connecting the lifting hole through the suspension equipment to achieve driving the rotor to move. Compared with lifting the rotor from the outer periphery of the rotor, the expansion method from the inner hole of the rotor is more stable, and the lifting rotor movement method is simpler. Multiple swinging heads expand the inner hole of the rotor to ensure the stability of the rotor during movement, reduce the difficulty of movement, shorten the preparation time before pressing, and improve the overall production efficiency of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 A schematic diagram of the structure of the inner hole tensioning device provided in an embodiment of the utility model;

[0026] Figure 2 A bottom view of the inner hole tensioning device used in the embodiment of the utility model;

[0027] Figure 3 A schematic diagram of the top view of the inner hole tensioning device used in the embodiment of the utility model;

[0028] Figure 4 This is a diagram of the expansion state of the inner hole expansion device used in the embodiment of the utility model;

[0029] Figure 5 for Figure 4 Schematic cross-sectional view of ;

[0030] Figure 6This is a diagram of the idle state of the inner hole tensioning device used in the embodiment of the utility model.

[0031] Description of reference numerals:

[0032] 1. Shell; 11. Slide; 12. Connecting plate; 13. Mounting frame; 131. First plate; 132. Second plate; 14. Lifting ring; 141. Lifting hole; 2. Telescopic drive member; 21. Connecting block; 3. Connecting rod assembly; 31. Transmission head; 32. First connecting rod; 33. Second connecting rod; 4. Extrusion block; 5. Reaction force assembly; 51. Reaction plate; 52. Connecting rod; 6. Friction pad; 7. Lock pin. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] It should be noted that the terms "length", "width", "height", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0035] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0037] Please also read Figures 1 to 6, the inner hole tensioning device provided by the utility model is now described. The inner hole tensioning device includes a shell 1, a telescopic driving member 2, a plurality of connecting rod assemblies 3 and a plurality of extrusion blocks 4 corresponding to the connecting rod assemblies 3. The shell 1 is an elongated cylindrical structure, and the side wall of the shell 1 is provided with a slideway 11 extending along its own axis. The shell 1 has a first end and a second end opposite to each other, and the first end is provided with a hanging hole 141; the telescopic driving member 2 is arranged at the second end, and the telescopic end of the telescopic driving member 2 slides with the inner cavity of the shell 1 along the long axis of the shell 1; a plurality of connecting rod assemblies 3 are evenly distributed around the outer circumference of the shell 1, and the transmission end and the telescopic end of the connecting rod assembly 3 are connected; the extrusion blocks 4 are respectively connected to the driven ends of the corresponding connecting rod assemblies 3, and can swing around the swing axis of the driven end under the drive of the connecting rod assembly 3, and the swing axis is perpendicular to the telescopic movement path of the telescopic end, and the extrusion blocks 4 can abut against the inner hole wall of the rotor.

[0038] It should be noted that, see Figure 4 and Figure 6 The extrusion block 4 of the present application has two states. When in an idle state, multiple extrusion blocks 4 are arranged in a direction close to the axis of the shell 1; when in a tensioned state, the telescopic end of the telescopic drive member 2 pushes the multiple transmission ends to move, and the transmission end drives the extrusion block 4 to swing in a direction away from the axis of the shell 1. At this time, the diameter of the circular trajectory formed by the multiple extrusion blocks 4 is larger than the diameter of the circular trajectory formed by the multiple swing heads 32 in the idle state.

[0039] It should be noted that the driving end and the driven end of the connecting rod assembly 3 are connected in a driving manner, and the driven end can rotate along the swing axis by the driving end moving with the telescopic end, thereby enabling the extrusion block 4 to swing.

[0040] Optionally, the telescopic driving member 2 adopts a hydraulic cylinder or an electric push rod, as long as it can drive the transmission end to move along the axis of the housing 1.

[0041] Compared with the prior art, the inner hole tensioning device provided in this embodiment provides a tensioning structure. When the telescopic end of the telescopic driving member 2 moves, the transmission end of the transmission assembly 3 is driven to move along the slideway 11. The transmission end is connected to the driven end, and the driven end is connected to the extrusion block 4. The multiple driven ends swing and then drive the multiple extrusion blocks 4 to swing toward the end away from the axis of the shell 1. The circular path formed by the multiple extrusion blocks 4 is expanded. When the shell 1 extends into the inner hole of the rotor, the telescopic end moves, and finally drives the extrusion block 4 to swing. The multiple extrusion blocks 4 are respectively in contact with the inner hole of the rotor to expand the inner hole of the rotor to achieve relative fixation of the rotor and the device. At this time, the rotor can be lifted by connecting the lifting hole 141 through the suspension equipment to achieve driving the rotor to move. Compared with lifting the rotor from the outer periphery of the rotor, the expansion method from the inner hole of the rotor is more stable, and the lifting rotor movement method is simpler. Multiple swing heads 32 expand the inner hole of the rotor to ensure the stability of the rotor during movement, reduce the difficulty of movement, shorten the preparation time before pressing, and improve the overall production efficiency of the rotor.

[0042] In some embodiments, see Figures 1 to 6 The shell 1 is provided with a connecting plate 12, the long axis of the connecting plate 12 is perpendicular to the long axis of the shell 1, and the connecting rod assembly 3 includes a transmission head 31, a first connecting rod 32, a second connecting rod 33 and a transmission rod. One end of the transmission head 31 is connected to the telescopic end, and the other end passes through the shell 1 and slides with the slideway 11 along the long axis direction of the shell 1. The transmission head 31 forms a transmission end; one end of the first connecting rod 32 is hinged to the passing end of the transmission head 31, and the axis of the hinge shaft is parallel to the swing axis; one end of the second connecting rod 33 is hinged to the other end of the first connecting rod 32, and the axis of the hinge shaft is parallel to the swing axis. The middle part of the second connecting rod 32 is hinged to the connecting plate 12, and the axis of the hinge shaft forms the swing axis. The other end of the second connecting rod 33 forms a driven end and is connected to the extrusion block 4.

[0043] It should be noted that the first connecting rod 32 is a straight rod, and the second connecting rod 33 is a special-shaped plate.

[0044] The connecting rod assembly 3 provided in this embodiment has a simple structure. The first connecting rod 32 drives the second connecting rod 33 to rotate. The second connecting rod 33 rotates around the positioning rod 34 as the rotation center. The rotation of the second connecting rod 33 drives the extrusion block 4 to swing, and finally the operation of tightening the inner hole of the rotor can be realized.

[0045] In some embodiments, see Figures 1 to 6 , one telescopic end is connected to multiple transmission heads 31 to drive multiple extrusion blocks 4 to move synchronously. The telescopic end is connected to multiple transmission heads 31 at the same time, and drives multiple transmission heads 31 to move at the same time, thereby making multiple extrusion blocks swing synchronously, thereby improving the expansion effect on the inner hole of the rotor.

[0046] In some embodiments, see Figure 5The telescopic end is provided with a connecting block 21, the outer periphery of the connecting block 21 is slidably matched with the inner cavity of the shell 1, and the outer periphery of the connecting block 21 is respectively connected with multiple transmission heads 31. The outer shaft of the connecting block 21 is slidably matched with the inner cavity of the shell 1 to ensure that the connecting block 21 always slides along the axis of the shell 1, ensuring the movement stability, and the connecting block 21 can be connected with multiple transmission heads 31 to ensure that the multiple transmission heads 31 move synchronously.

[0047] In some embodiments, see Figures 1 to 6 The first end is provided with a mounting frame 13, and the mounting frame 13 is provided with a hanging hole 141. The mounting frame 13 is connected to the telescopic driving member 2, and the mounting frame 13 has a through hole, which is connected to the inner cavity of the housing 1. The mounting frame 13 can contact the end surface of the rotor to prevent the housing 1 from excessively extending into the inner hole of the rotor. The housing 1 can extend into the inner hole at a suitable position, so that the extrusion block 4 can be in the middle position of the inner hole of the rotor, increasing the stability of lifting. The through hole can avoid the telescopic driving member 2, so that the telescopic end can be connected to the connecting block 21 to drive the transmission head 31 to move.

[0048] In some embodiments, see Figures 1 to 6 The mounting frame 13 includes a first plate 131 and a second plate 132 which are perpendicular to each other. The second plate 132 is connected to the first end, and the plate surface of the second plate 132 is perpendicular to the axial direction of the shell 1; the central axis of the intersection of the first plate 131 and the second plate 132 overlaps with the axis of the shell 1; the second plate 132 and / or the first plate 131 are provided with a lifting ring 14, and the lifting ring 14 forms a lifting hole 141. The first plate 131 and the second plate 132 are perpendicular to each other, providing 4 contact points, which can prevent the axis of the shell 1 from deviating from the axis of the inner hole of the rotor after the shell 1 is inserted into the inner hole of the rotor. The first plate 131 and the second plate 132 can make the axis of the shell 1 overlap with the axis of the inner hole of the rotor to ensure the normal expansion work. The lifting ring 14 can be suspended with a gantry crane, a cantilever crane or a hand crane to move the rotor.

[0049] In some embodiments, two ends of the plate surface of the first plate 131 are provided with hanging rings 14 , and the two hanging rings 14 are symmetrically distributed along the central axis of the first plate 131 .

[0050] In some embodiments, two ends of the plate surface of the second plate 132 are provided with hanging rings 14 , and the two hanging rings 14 are symmetrically distributed along the central axis of the second plate 132 .

[0051] In some embodiments, both ends of the first plate 131 and the second plate 132 are provided with hanging rings 14 .

[0052] In some embodiments, see Figures 1 to 6The side of the mounting frame 13 away from the first end is connected with a reaction assembly 5, and the reaction assembly 5 includes a reaction plate 51 and a plurality of connecting rods 52. The reaction plate 51 is fixedly connected to the side of the telescopic drive member 2 away from the first end. The two ends of the connecting rod 52 are respectively connected to the reaction plate 51 and the mounting frame 13, and the plurality of connecting rods 52 are distributed around the telescopic path of the telescopic end. The reaction plate 51 is fixed in position, which can limit the reverse movement of the telescopic drive member 2, ensure that the connecting block 21 can slide smoothly in the inner cavity of the shell 1, and avoid the situation where the position of the connecting block 21 remains unchanged and the main body of the telescopic drive member 2 moves along the axis of the shell 1.

[0053] In some embodiments, see Figures 1 to 5 The side of the extrusion block 4 away from the second connecting rod 33 is provided with a friction pad 6. The friction pad 6 can increase the friction between the extrusion block 4 and the inner hole wall of the rotor, improve the expansion effect, and avoid hard extrusion between the extrusion block 4 and the inner hole of the rotor, which may cause damage to the inner hole of the rotor.

[0054] During specific implementation, the friction pad 6 is a rubber pad with a rough surface.

[0055] As a specific embodiment of the friction pad 6, the friction pad 6 is a square structure, and the four corners of the square structure are rounded.

[0056] In some embodiments, see Figures 1 to 5 The side of the extrusion block 4 facing away from the housing 1 is provided with an installation groove, and the friction pad 6 is embedded in the installation groove, and the outer periphery of the friction pad 6 protrudes from the notch of the installation groove. The installation groove can position the friction pad 6, reducing the difficulty of installation.

[0057] In some embodiments, see Figures 1 to 5 The extrusion block 4 is provided with a pin hole, the axis of the pin hole is perpendicular to the axis of the housing 1, and the friction pad 6 is provided with a through hole corresponding to the pin hole. The extrusion block 4 and the friction pad 6 are fixedly connected by a locking pin 7 passing through the through hole and the pin hole respectively. The locking pin 7 passes through the through hole and the pin hole at the same time, fixing the extrusion block 4 and the friction pad 6 together, improving the connection strength, and then preventing the friction pad 6 from falling off during the expansion process, thereby improving the working stability.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An inner hole tensioning device, characterized in that: include: The shell is an elongated cylindrical structure, the side wall of the shell is provided with a slideway extending along its long axis, the shell has a first end and a second end opposite to each other, and the first end is provided with a hanging hole; A telescopic driving member is disposed at the second end, and the telescopic end of the telescopic driving member is slidably matched with the inner cavity of the shell along the long axis of the shell; A plurality of connecting rod assemblies are evenly distributed around the outer circumference of the housing, and the transmission end of the connecting rod assembly is connected to the telescopic end; as well as A plurality of extrusion blocks corresponding to the connecting rod assemblies are respectively connected to the driven ends of the corresponding connecting rod assemblies and can swing around the swing axis of the driven end under the drive of the connecting rod assembly, the swing axis is perpendicular to the telescopic movement path of the telescopic end, and the extrusion blocks can abut against the inner hole wall of the rotor.

2. The inner hole tensioning device according to claim 1, characterized in that: The housing is provided with a connecting plate, the long axis of the connecting plate is perpendicular to the long axis of the housing, and the connecting rod assembly comprises: A transmission head, one end of which is connected to the telescopic end, and the other end of which passes through the shell and slides with the slideway along the long axis of the shell, and the transmission head forms the transmission end; A first connecting rod, one end of which is hinged to the outlet end of the transmission head, and the axis of the hinge shaft is parallel to the swing axis; A second connecting rod, one end of which is hinged to the other end of the first connecting rod, and the axis of the hinge shaft is parallel to the swing axis. The middle part of the second connecting rod is hinged to the connecting plate, and the axis of the hinge shaft forms the swing axis. The other end of the second connecting rod forms the driven end and is connected to the extrusion block.

3. The inner hole tensioning device according to claim 2, characterized in that: One of the telescopic ends is connected to a plurality of the transmission heads to drive the plurality of the extrusion blocks to move synchronously.

4. The inner hole tensioning device according to claim 2, characterized in that: The telescopic end is provided with a connecting block, the outer periphery of the connecting block is slidably matched with the inner cavity of the shell, and the outer periphery of the connecting block is respectively connected to the plurality of transmission heads.

5. The inner hole tensioning device according to claim 1, characterized in that: The first end is provided with a mounting frame, the mounting frame is provided with the hanging hole, the mounting frame is connected to the telescopic driving member, the mounting frame has a through hole, and the through hole is communicated with the inner cavity of the shell.

6. The inner hole tensioning device according to claim 5, characterized in that: The mounting frame includes a first plate and a second plate that are perpendicular to each other, the second plate is connected to the first end, and the plate surface of the second plate is perpendicular to the axial direction of the shell; the central axis of the intersection of the first plate and the second plate overlaps with the axis of the shell; the second plate and / or the first plate are provided with a lifting ring, and the lifting ring forms the lifting hole.

7. The inner hole tensioning device according to claim 5, characterized in that: A reaction force assembly is connected to the side of the mounting frame away from the first end, and the reaction force assembly includes a reaction force plate and a plurality of connecting rods. The reaction force plate is fixedly connected to the side of the telescopic drive member away from the first end, and the two ends of the connecting rod are respectively connected to the reaction force plate and the mounting frame, and the plurality of connecting rods are distributed around the telescopic path of the telescopic end.

8. The inner hole tensioning device according to claim 2, characterized in that: A friction pad is provided on the side of the extrusion block away from the second connecting rod.

9. The inner hole tensioning device according to claim 8, characterized in that: A mounting groove is formed on the side of the extrusion block facing away from the shell, the friction pad is embedded in the mounting groove, and the friction pad protrudes from the notch of the mounting groove.

10. The inner hole tensioning device according to claim 9, characterized in that: The extrusion block is provided with a pin hole, the axis of the pin hole is perpendicular to the axis of the shell, the friction pad is provided with a through hole corresponding to the pin hole, and the extrusion block and the friction pad are fixedly connected by locking pins passing through the through hole and the pin hole respectively.

Images