An axial tensioning device for a motor shaft wound with a wire rope

Abstract

The application discloses an axial tension device applied to motor shaft winding wire, which is composed of a motor shaft coupling device, a spring tension device and a fixed platform. The motor shaft coupling device and the spring tension device are connected through a spring. The motor shaft coupling device cooperates with the wire, the motor shaft and the spring, realizes the pulling control of the motor on the wire, and connects the wire and the spring. The spring tension mechanism controls the wire tension degree by adjusting the fixed rod and the limiting rod to control the spring elongation. By adjusting the height of the limiting rod, the application realizes the stable adjustment of the wire tension degree, and realizes the wide-range pre-adjustment of the tension force and the small-range adjustment in the wire movement. The application directly places the tension mechanism on the motor axial direction, can flexibly adjust the tension force of the wire on the motor axial position, simplifies the structure, improves the space utilization efficiency, and realizes the close arrangement of multiple wires.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wire tensioning design, and particularly relates to an axial tensioning device applied to a wire wound around a motor shaft. BACKGROUND

[0002] A motor is a common driving source for driving the movement of a wire. The wire is wound around the motor, and the movement of the wire is driven by rotating the motor to drive the controlled device. The wire needs to be tensioned during use. Traditional wire tensioning mechanisms mainly include tensioning wheel tensioning mechanisms, elastic connecting piece tensioning mechanisms, electromagnetic tensioning mechanisms, hydraulic tensioning mechanisms, etc. Among them, the traditional tensioning wheel tensioning mechanism and the elastic connecting piece tensioning mechanism respectively add a pulley and a spring to the wire. The wire tensioning mechanism is arranged between the driving source and the controlled device. The length of the wire is adjusted by adjusting the position of the pulley and the spring, so as to achieve the tensioning effect. This kind of wire tensioning mechanism occupies a large space between the driving source and the controlled device, and is not friendly to the design of multiple wires arranged closely. The electromagnetic tensioning mechanism and the hydraulic tensioning mechanism have complex structures, and are difficult to apply in a narrow space, and are difficult to meet the tensioning needs of small devices. At the same time, the pre-adjustable range of the tensioning force of the traditional small-size wire tensioning mechanism is small, and it is difficult to automatically adjust the tensioning force during the movement of the wire. How to realize the large-range tensioning force adjustment of multiple wires in a narrow space is an important problem in the design of the tensioning mechanism. At the same time, some traditional wire tensioning mechanisms in a narrow space are difficult to simultaneously realize the adjustment of the pre-tensioning force of the wire and the adjustment of the tensioning force during use. How to simultaneously realize the adjustment of the two kinds of tensioning forces in a narrow space is also an important research problem.

[0003] The wire tensioning mechanism installed between the driving source and the controlled device greatly limits the spatial design of multiple wires. The wire tensioning mechanism arranged axially on the driving source is matched with the driving source for assembly, reduces the installation of devices between the driving source and the controlled device, and is conducive to the close arrangement of multiple wires. There are few studies on the axial wire tensioning mechanism for the driving source of the motor, and the application of the axial wire tensioning mechanism for small devices is insufficient. At present, the axial wire tensioning mechanism is less applied to the motor in a narrow space, and the adjustment range of the tensioning force is small. How to reduce the volume of the axial wire tensioning mechanism while improving the adjustment range of the tensioning mechanism is an important problem in the design of the wire tensioning mechanism. In summary, the axial wire tensioning mechanism applied to small devices has high practical value. SUMMARY

[0004] The present application aims at the deficiencies of the prior art, and provides an axial tensioning device applied to a wire wound around a motor shaft.

[0005] The application aims at realizing the following technical scheme: an axial tension device applied to a motor shaft winding rope, which comprises a motor shaft device and a spring tension device, and a lower platform and an upper platform.

[0006] The motor shaft device comprises a motor and a motor shaft coupling, and the motor shaft coupling is provided with a rope hole and an annular guide rail, the annular guide rail is divided into two circles, two ropes are respectively wound around one of the two circles and then pass through the rope hole and are connected with each other in the middle of the motor shaft coupling, and the connected ropes are connected with the spring.

[0007] Further, the spring tension device comprises a limiting rod, a fixing rod and a limiting device.

[0008] The limiting device is provided with a limiting hole, the limiting rod passes through the limiting hole, the fixing rod is connected with the spring and is fixed on the limiting device through the limiting rod.

[0009] Further, the limiting hole on the limiting device comprises seven groups, which are used to adjust the positions of the limiting rod and the fixing rod.

[0010] Further, the limiting rod uses a flat head screw with threads, and the fixing rod uses a copper rod with a high friction coefficient, a pattern and a concave-convex design, which improves the friction coefficient between the fixing rod and the limiting rod and avoids the slippage between the fixing rod and the limiting rod.

[0011] Further, the motor shaft coupling is provided with two threaded holes, and the motor shaft coupling and the motor shaft are connected through screws.

[0012] Further, the upper platform is provided with a plurality of spring tension devices, and the lower platform comprises a plurality of motor shaft devices, and the number of the spring tension devices is consistent with the number of the motor shaft devices.

[0013] The application has the following advantages:

[0014] Firstly, the tension device can adjust the rope tension in the axial position of the motor shaft, solves the problem of the space occupation between the driving source and the controlled equipment in the traditional rope tension mechanism, and realizes the close arrangement of multiple ropes in a narrow space.

[0015] Secondly, the tension device can adjust the tension in a large range, solves the problem of the insufficient tension adjustment range of the traditional rope tension mechanism in a narrow space, and improves the adjustment ability of the tension mechanism in a narrow space.

[0016] Third: the tensioning device of the application occupies less space, solves the problem that the axial tensioning device is difficult to implement in narrow space, and improves the space utilization efficiency.

[0017] Fourth: the tensioning device simultaneously realizes large-range pre-adjustment of the tensioning force and small-range adjustment in the wire rope movement, and solves the problem that the tensioning force is difficult to adjust in the wire rope movement in narrow space. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a simulation design drawing of an axial tensioning device for winding wire rope on a motor shaft, which is proposed by the application;

[0019] Figure 2 is a physical drawing of an axial tensioning device for winding wire rope on a motor shaft, which is proposed by the application;

[0020] Figure 3 is a physical drawing of an axial tensioning device for winding wire rope on a motor shaft applied to a wire transmission dexterous hand, which is proposed by the application. DETAILED DESCRIPTION

[0021] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings.

[0022] The embodiments of the application provide an axial tensioning device for winding wire rope on a motor shaft, which is used for realizing large-range pre-adjustment of wire rope tensioning force and small-range adjustment in wire rope movement in the axial direction of the motor shaft in narrow space, so as to realize close arrangement of multiple wire ropes in narrow space.

[0023] In order for those skilled in the art to better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0024] Please refer to Figure 1 The axial tensioning device for winding wire rope on a motor shaft disclosed in the application is used for controlling the wire rope tensioning force of the motor shaft in the axial position, and includes a motor shaft coupling device 14 and a spring tensioning device 15.

[0025] The motor shaft coupling device 14 includes a motor 1 and a motor shaft coupling 2. The motor shaft coupling 2 has two threaded holes 16, and the motor shaft coupling 2 and the motor shaft are connected by two screws 3. The motor shaft coupling has a wire hole 4, an upper and lower ring-shaped guide rail 5, and a threaded hole 16. Two wires 17 are wound around the ring-shaped guide rail 5 once and then enter the wire hole 4, and are connected in the middle of the motor shaft coupling 2. After connection, the wires 17 are connected with the spring 6. The motor shaft coupling device 14 is fixed on the lower platform 11. The lower platform 11 is connected to the upper platform 13 through a copper column 12. The spring tensioning device 15 is fixed on the upper platform 13 and includes a limiting rod 7, a fixed rod 8, and a limiting device 9. The limiting rod 7 passes through the limiting hole 10 of the limiting device 9 to achieve fixation. There are seven groups of limiting holes 10, which can adjust the position. The fixed rod 8 is placed above the limiting rod 7 and is connected with the spring 6.

[0026] In the above-mentioned wire tensioning device, the motor shaft coupling is made of aluminum alloy material, and the limiting device is 3D printed to reduce weight.

[0027] In this example, a method for tensioning the wires wound around the motor shaft is as follows:

[0028] Two wires are wound around two ring-shaped guide rails 5 once, pass through opposite wire holes 4, and are connected to each other inside the hollow motor shaft coupling 2, thereby connecting the two wires into one. The spring 6 is connected to the fixed rod 8 after the wires are connected. The fixed rod 8 is placed above the limiting rod 7, and the fixed rod 8 is positioned by the downward tension of the spring 6 and the friction of the limiting rod 7. The limiting rod 7 is placed in the limiting hole 10 of the limiting device 9, and there are seven groups of limiting holes 10 that can adjust the position of the limiting rod 7 and set the position of the limiting rod 7. Thus, the position of the fixed rod 8 is fixed, the length of the spring 6 is set, and the pre-tensioning force is set.

[0029] The above-mentioned wire tensioning device can achieve large-scale pre-adjustment of wire tensioning force and small-scale adjustment of wire movement. The large-scale pre-adjustment of wire tensioning force is achieved by adjusting the corresponding positions of the limiting rod 7 and the fixed rod 8 in the limiting hole 10 of the limiting device 9. By adjusting the corresponding positions of the limiting rod 7 and the fixed rod 8 in the limiting hole 10 of the limiting device 9, the height of the limiting rod 7 and the fixed rod 8 is adjusted. The fixed rod 8 is connected with the spring 6, and the lower end of the spring 6 is connected with the wire, which can be considered as height-fixed. The height of the spring 6 upper end can be adjusted by adjusting the height of the limiting rod 7 and the fixed rod 8, thereby adjusting the length of the spring 6. The change of the length of the spring 6 will cause the change of the pre-tensioning force. Since there are seven groups of limiting holes 10 with different heights, the length of the spring 6 has seven different pre-adjustment values, thereby achieving large-scale adjustment of the pre-tensioning force.

[0030] Small range adjustment of tension force in wire rope movement is realized by elastic deformation of spring itself during movement. In wire rope use process, certain elastic deformation may occur, which may cause temporary change of required spring tension force. The design can make the spring deform according to the required tension force. The upper end of the spring is fixed due to the fixed position of the limiting rod and the fixed rod, and can be regarded as high fixed. Deepening of the tightness of the wire rope will drive the lower end of the spring to deform downward, thereby increasing the elongation of the spring and improving the tension force. When the tightness of the wire rope decreases, the lower end of the spring deforms upward, thereby reducing the elongation of the spring and reducing the tension force. Thus, small range adjustment of the tension force in use is realized. Combined with the limiting rod adjustment, large range pre-adjustment and small range adjustment in use of the tension force can be realized.

[0031] In this example, the wire rope tensioning device uses the cooperation of friction and spring tension to realize the fixation of the fixed rod position at very low cost. The fixed rod is directly connected with the spring and placed on the limiting rod, and is subjected to the downward tension of the spring and the friction of the limiting rod. The fixed rod is a copper rod with patterns and concave-convex design on the surface, and the limiting rod is a flat head screw with threads, which greatly improves the friction coefficient between the fixed rod and the limiting rod. The fixed rod is subjected to a large tension of the spring. Since the spring is connected with the wire rope and the wire rope is directly connected with the motor, the rotation of the motor in use will drive the spring to rotate, which may cause the spring to deviate. The spring tension is decomposed into a vertical downward tension T, a tension F1 parallel to the limiting rod and a tension F2 parallel to the fixed rod. Since the fixed rod and the limiting rod with large friction coefficient are used, F1 and F2 are always less than the maximum static friction, so that the fixed rod and the limiting rod will not slide relative to each other, ensuring the fixation of the fixed rod position.

[0032] The application realizes an axial tension device applied to motor shaft winding wire rope, which combines the characteristics of axial tension device adapting to multiple wire rope close arrangement, please refer to Figure 2 , adopts multiple motor wire rope close arrangement, and realizes large range adjustment of tension force of multiple close arranged wire ropes.

[0033] Please refer to Figure 3 , Figure 3The axial tension device is applied to the axial tension device for winding wire of motor shaft applied to the real object diagram of wire transmission dexterous hand. In the application of the dexterous hand, the arrangement of 11 tension mechanisms is realized in a small space range, and the total length of the 11 tension mechanisms is less than 12 cm, and the width is also less than 12 cm. The device realizes the tension force adjustment of multiple closely arranged wires in a narrow space. At the same time, since the tension device is an axial tension mechanism, the tension device cooperates with the driving source motor to solve the problem of the space between the traditional wire tension mechanism and the controlled device. In this example, the internal space of the dexterous hand is extremely narrow, so the traditional wire tension mechanism is difficult to use in the dexterous hand. The axial tension device is placed behind the occupied space, which reduces the space occupation and realizes the wide-range pre-adjustment of the tension force and the small-range adjustment of the wire movement, and solves the problem that the tension force is difficult to adjust in the wire movement in a narrow space. In this example, each group of wires includes two wires, and the tension of 11 groups of wires is realized in a space with a length and width of less than 12 cm, that is, the tension of a total of 22 wires is realized. The axial tension device has an advantage in adjusting the tension force of multiple closely arranged wires in a narrow space.

[0034] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0035] It is to be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application. The application is not restricted to the precise construction and combinations of parts and steps described above and shown in the accompanying drawings, as such variations and modifications are intended to be included within the scope of the application. The scope of the application is limited only by the following claims.

Claims

1. An axial tensioning device for a motor shaft wound with a wire rope, characterized in that, The device comprises a lower platform with motor shaft coupling and an upper platform with spring tensioning device, the motor shaft coupling and spring tensioning device are connected by spring, the upper and lower platforms are connected by copper column; The spring tensioning device comprises a limiting rod, a fixing rod and a limiting device; The limiting device is installed with limiting holes, the limiting holes comprise seven groups for adjusting the position of the limiting rod and the fixing rod; the limiting rod passes through the limiting holes; the fixing rod is connected with the spring and fixed on the limiting device by the limiting rod, the length of the spring is adjusted by adjusting the position of the fixing rod and the limiting rod; the copper rod with patterns and concave-convex design is used on the surface of the fixing rod, and the flat head screw with threads is used for the limiting rod, which improves the friction coefficient between the fixing rod and the limiting rod and avoids slipping; The upper platform is installed with several spring tensioning devices, and the lower platform comprises several motor shaft couplings, the number of the spring tensioning devices and the motor shaft couplings is consistent; The motor shaft coupling comprises a motor and a motor shaft coupling, the motor shaft coupling is provided with a wire hole and an annular guide rail, the annular guide rail is divided into two circles, two wires are respectively wound around one of the circles and pass through the wire hole, and the two wires are connected with each other in the middle of the motor shaft coupling, and the connected wires are connected with the spring.

2. An axial tensioning device for a motor shaft wound wire rope according to claim 1, characterized in that, The motor shaft coupling is provided with two threaded holes, and the motor shaft coupling and the motor shaft are connected by screws.

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