Wire drawing mechanism of racket threading machine

Abstract

The utility model discloses a wire drawing mechanism of a racket threading machine, which comprises a base, a fixed upright post, a control module fixed on the base, a driving mechanism motor electrically connected with the control module, a transmission mechanism connected with the driving mechanism motor, a tension sensor fixedly connected with the transmission mechanism, and a wire clamping device fixedly connected with the tension sensor, the tension sensor is in signal connection with the control module and transmits a measured torque signal to the control module, and the control module receives the signal of the tension sensor, carries out operation processing on the signal and then sends an instruction to control a motor of the driving mechanism to operate to drive the wire clamping device to work. The two sets of fixed stand columns are fixed to the left side and the right side of the base respectively, a motor support is arranged on the base, and the driving mechanism motor is installed on the motor support. The utility model belongs to the technical field of racket threading machines, and particularly relates to a thread pulling mechanism of a racket threading machine.

Description

Technical Field

[0001] The utility model belongs to the technical field of racket stringing machines, in particular to a wire pulling mechanism of a racket stringing machine. Background Art

[0002] A racket stringing machine, also known as a "racket stringing machine," is a machine used to string tennis rackets, badminton rackets, squash rackets, and other rackets. When people use tennis rackets, badminton rackets, and squash rackets for sports activities, they have increasingly higher requirements for the tension of the rackets after stringing. Stable and appropriate tension directly affects the hitting effect and the service life of the racket. Therefore, when stringing the racket, it is very important to control the tension of the racket. With the improvement of living standards, more and more people are participating in sports activities. In the past, when people needed to replace the racket strings for sports activities, they would hand the rackets over to professional sporting goods stores or manufacturers for replacement of the racket strings. Now, some individuals also purchase stringing machines to string the rackets themselves, so the requirements for the stringing efficiency of the machines are also getting higher and higher.

[0003] The wire pulling devices currently on the market mainly include the early heavy hammer lever type, the mid-term hand-cranked elastic traction type, and the current electric electronic traction type. The pulling system of the heavy hammer lever type uses the lever principle to control the tension of the wire by adjusting the heavy hammer weight on the lever. This device is time-consuming, physically demanding, and inefficient. The hand-cranked elastic traction type uses a spring tension system to measure the tension value by the deformation of the spring. Since the spring is prone to deformation and elastic fatigue, the tension is unstable, and high-precision tension measurement and constant tension adjustment cannot be achieved. The electric electronic traction wire pulling device uses the control module of electronic technology to calculate and process the signal of the torque or tension sensor, and then sends instructions to the drive structure to drive the wire clamping device to work. It can achieve accurate measurement of the wire tension and wire pulling control, and can dynamically compensate for and adjust the tension caused by the tensile deformation of the wire in real time, thereby achieving precise constant tension threading operation.

[0004] Market research and analysis revealed that the main structure (transmission mechanism) of the stringing device of existing racket stringing machines on the market uses a cubic linear slider to drive the tension sensor and the clamping device to perform linear reciprocating motion to achieve racket stringing. There are two main methods: chain drive and low-lead screw drive. Chain drive has limited adjustable space and poor positioning accuracy, which directly leads to large tolerances on the tension force, poor stability, and long factory commissioning time. Due to the use of a low-lead screw and a high-speed drive mechanism motor, and the screw is directly connected to the drive mechanism motor through a coupling, there is no way to reduce or eliminate axial vibration when the screw is in operation. This directly leads to high noise levels during operation, a short service life, unstable tension force, and long factory commissioning time. Utility Model Content

[0005] In order to solve the above-mentioned problem, the utility model provides a wire pulling mechanism for a racket stringing machine.

[0006] In order to achieve the above functions, the technical solution adopted by the present invention is as follows: the wire pulling mechanism of the racket stringing machine includes a base, a fixed column, a control module fixed on the base, a driving mechanism motor electrically connected to the control module, a transmission mechanism connected to the driving mechanism motor, a tension sensor fixedly connected to the transmission mechanism, and a wire clamping device fixedly connected to the tension sensor. The tension sensor is connected to the control module signal and transmits the measured torque signal to the control module. The control module receives the signal of the tension sensor, performs calculation on the signal, and then sends an instruction to control the operation of the driving mechanism motor to drive the wire clamping device to work. The fixed columns are provided in two groups and are respectively fixed on the left and right sides of the base. A motor bracket is provided on the base, and the driving mechanism motor is installed on the motor bracket.

[0007] As an optimal technical solution of the present utility model, the transmission mechanism includes a cube linear slider, a linear bearing, a first transmission gear, a second transmission gear, a multi-head screw transmission shaft, a multi-head screw nut and a fixed rod. The first transmission gear is installed on the output shaft of the driving mechanism motor, and the second transmission gear is installed on one end of the multi-head screw transmission shaft and meshes with the first transmission gear. The linear bearing and the multi-head screw nut are fixed on the cube linear slider, and the multi-head screw transmission shaft meshes with the multi-head screw nut and rotates through the cube linear slider. The two ends of the multi-head screw transmission shaft are fixed on the fixed columns on both sides, and the fixed rod and the linear bearing slide together through the cube linear slider. The two ends of the fixed rod are fixed on the fixed columns on both sides. When the multi-head screw transmission shaft and the multi-head screw nut are precisely meshed and rotated, they drive the cube linear slider to move back and forth in a linear manner.

[0008] As an optimal technical solution of the present invention, a position sensor is installed on the base. Two groups of position sensors are provided and are respectively located on the same side of the two groups of fixed columns. The position sensors monitor and control the transmission mechanism to drive the wire clamping device to move back and forth in a straight line.

[0009] As a preferred technical solution of the present invention, one end of the tension sensor is fixedly connected to the cubic linear slider, and the other end of the tension sensor is fixedly connected to the wire clamping device.

[0010] As a preferred technical solution of the present invention, the driving mechanism motor adopts a worm gear reduction motor that is self-locking when power is off.

[0011] Compared with the prior art, the utility model adopts the above structure to achieve the following beneficial effects: the driving mechanism motor adopts a worm gear reduction motor with power-off self-locking, which achieves the tension value of power-off self-locking, improves the service life of the motor, is more energy-efficient, and has a faster factory debugging time; a set of transmission gears and a large-lead high-precision multi-head screw are combined to effectively solve the axial vibration of the screw during high-speed operation, and can realize stable and controllable power transmission and high-precision positioning lock, reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an exploded schematic diagram of Example 1 of the string pulling mechanism of the racket stringing machine proposed by the present invention;

[0013] Figure 2 This is a schematic diagram of the overall structure of Example 1 of the string pulling mechanism of the racket stringing machine proposed by the present utility model;

[0014] Figure 3 This is an exploded schematic diagram of Example 2 of the string pulling mechanism of the racket stringing machine proposed by the present invention;

[0015] Figure 4 This is a schematic diagram of the overall structure of Example 2 of the wire pulling mechanism of the racket stringing machine proposed by the present invention.

[0016] Among them, 1. Drive mechanism motor, 2. Motor bracket, 3. First transmission gear, 4. Second transmission gear, 5. Fixed column, 6. Multi-head screw drive shaft, 7. Fixed rod, 8. Linear bearing, 9. Control module, 10. Wire clamping device, 11. Tension sensor, 12. Square linear slider, 13. Multi-head screw nut, 14. Position sensor, 15. Base. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for the purpose of facilitating the description of the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The present invention will be further described below in conjunction with the accompanying drawings.

[0019] like Figure 1-4 As shown, the wire pulling mechanism of the racket stringing machine provided by the utility model includes a base 15, two groups of fixed columns 5 fixed on the base 15, a motor bracket 2 fixed on the base 15, a control module 9 fixed on the base 15, a driving mechanism motor 1 electrically connected to the control module 9, a first transmission gear 3 connected to the driving mechanism motor 1, a second transmission gear 4 connected to the first transmission gear 3, a multi-head screw drive shaft 6 connected to the second transmission gear 4, a linear bearing 8 and a multi-head screw nut 13 fixedly connected to a square linear slider 12, a fixed rod 7 slidingly passes through the linear bearing 8, and both ends are tightly fixed on the fixed columns 5 on the left and right sides, the multi-head screw drive shaft 6 and the multi-head screw nut 13 precisely engage and rotate through the square linear slider 12, and both ends are tightly fixed on the fixed columns 5 on the left and right sides, a tension sensor 11 fixedly connected to the square linear slider 12, and a wire clamping device 10 fixedly connected to the tension sensor 11.

[0020] The two position sensors 14 are fixed on the base on the same side of the fixed column 5. The two position sensors 14 and the tension sensor 11 are respectively connected to the control module 9 for signals, and transmit the measured position signals and tension signals to the control module 9 respectively.

[0021] The control module 9 is also electrically connected to a liquid crystal display for displaying the tension value and a function button (not shown) for setting the tension value of the string. According to the strength and exercise level of the racket user, different tension values can be set on the function button as needed when pulling the string.

[0022] The driving mechanism motor 1 adopts a worm gear reduction motor with self-locking function when power is cut off as the power source.

[0023] Example 1

[0024] like Figure 1-2 As shown, based on the above method, the first transmission gear 3 and the second transmission gear 4 are both spur gears, and the second transmission gear 4 is meshed with the first transmission gear 3 in a horizontal straight line at 180 degrees.

[0025] Example 2

[0026] like Figure 3-4 As shown, based on the above solution, the first transmission gear 3 and the second transmission gear 4 both adopt 90-degree umbrella disc gears, and the second transmission gear 4 is meshed with the first transmission gear 390 degrees horizontally and linearly.

[0027] The tension of the wire is transferred to the tension sensor 11 in the form of torque, and then the tension sensor 11 transmits a signal to the control module 9. The control module 9 measures the torque signal and converts it into a tension value, and sends instructions to the drive mechanism motor 1 to work to achieve accurate measurement of the wire tension and wire pulling control. A tension value coefficient table is set in the control module 9. By receiving the signal feedback from the tension sensor 11 or the position sensor 14, it quickly sends instructions to the drive mechanism motor 1 through analog / digital conversion, calculation and conversion to work.

[0028] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. The stringing mechanism of a racket stringing machine is characterized by: The invention comprises a base (15), a fixed column (5), a control module (9) fixed on the base (15), a drive mechanism motor (1) electrically connected to the control module (9), a transmission mechanism connected to the drive mechanism motor (1), a tension sensor (11) fixedly connected to the transmission mechanism, and a wire clamping device (10) fixedly connected to the tension sensor (11), wherein the tension sensor (11) is connected to the control module (9) for signal transmission, two groups of fixed columns (5) are provided and are respectively fixed to the left and right sides of the base (15), a motor bracket (2) is provided on the base (15), and the drive mechanism motor (1) is mounted on the motor bracket (2).

2. The string pulling mechanism of the racket stringing machine according to claim 1, characterized in that: The transmission mechanism comprises a cubic linear slider (12), a linear bearing (8), a first transmission gear (3), a second transmission gear (4), a multi-threaded screw transmission shaft (6), a multi-threaded screw nut (13) and a fixed rod (7), wherein the first transmission gear (3) is mounted on the output shaft of the driving mechanism motor (1), the second transmission gear (4) is mounted on one end of the multi-threaded screw transmission shaft (6) and meshes with the first transmission gear (3), the linear bearing (8) and the multi-threaded screw nut (13) are fixed on the cubic linear slider (12), the multi-threaded screw transmission shaft (6) meshes with the multi-threaded screw nut (13) and rotates through the cubic linear slider (12), the two ends of the multi-threaded screw transmission shaft (6) are fixed on the fixed columns (5) on both sides, the fixed rod (7) and the linear bearing (8) are slidably matched and pass through the cubic linear slider (12), and the two ends of the fixed rod (7) are fixed on the fixed columns (5) on both sides.

3. The string pulling mechanism of the racket stringing machine according to claim 1, characterized in that: Position sensors (14) are installed on the base (15). Two groups of position sensors (14) are provided and are respectively located on the same side of the two groups of fixed columns (5).

4. The string pulling mechanism of the racket stringing machine according to claim 2, characterized in that: One end of the tension sensor (11) is fixedly connected to the square linear slider (12), and the other end of the tension sensor (11) is fixedly connected to the wire clamping device (10).

5. The string pulling mechanism of the racket stringing machine according to claim 1, characterized in that: The driving mechanism motor (1) adopts a worm gear reduction motor that is self-locking when power is off.

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