Shock-proof servo rapier transmission device for heavy sisal hemp rapier loom

Abstract

The invention relates to a shock-proof servo rapier conveying device for a heavy sisal hemp rapier loom. The shock-proof servo rapier conveying device comprises a transmission mechanism, a universal joint and a rapier conveying wheel, the transmission mechanism is connected with the rapier conveying wheel through a plurality of universal joints, and any two adjacent universal joints are connected through a connecting rod. According to the shock-proof servo rapier conveying device for the heavy sisal hemp rapier loom, the requirement of a separated rapier conveying system is met only through the transmission motor, the universal joint and the rapier conveying wheel, the servo motor is prevented from being vibrated, and therefore the problem that the servo transmission motor is damaged due to vibration is thoroughly solved, and the service life of the servo motor is greatly prolonged; meanwhile, moving parts are few, the structure is simple, installation is convenient, and reliability is high.

Description

Technical Field

[0001] The invention belongs to the technical field of textile machinery and relates to a shock-absorbing servo rapier transmission device for a sisal heavy-duty rapier loom. Background Art

[0002] At present, the sword transmission mechanism of the rapier loom is fixed on the frame or on the sley according to its installation position. The former is called the sley separated sword transmission mechanism because the weft insertion part is separated from the weft beating movement, while the latter is called the non-sley separated sword transmission mechanism. Therefore, the common sisal heavy rapier looms are divided into these two types according to the different positions of the sword transmission mechanism.

[0003] On a rapier loom with a non-sley separated sword transmission mechanism, the rapier and its sword transmission mechanism swing forward and backward with the sley, and the rapier moves left and right relative to the sley to complete the weft insertion. It can use an ordinary crank-connecting rod beating mechanism, but the beating stroke is large, which requires the movement of the rapier in the shed, and the shed height is required to be large to avoid excessive squeezing of the warp yarn by the rapier head when entering and exiting the shed. In addition, the sley has a large moment of inertia, which affects the further increase of the vehicle speed. At the same time, due to the large number of structural components and complex structure of the six-bar linkage and the four-bar linkage, their reliability is also affected to a certain extent after long-term operation (Research on the dynamic characteristics of the flexible hinge gap of the space connecting rod weft insertion mechanism [J]. Journal of Textile Research, 2021, 42(01): 145-153. DOI: 10.13475 / j.fzxb.20200401309.). This structure is usually the design of a traditional loom, and the beating movement is driven by a main motor and completed by a mechanical transmission device.

[0004] On a rapier loom with a sley-separated sword transmission mechanism, the sword transmission mechanism does not swing back and forth with the sley, and the sley is driven by a conjugate cam (Flexible Dynamics Analysis of High-Speed ​​Conjugate Cam Weft Beating Mechanism [J]. Journal of Mechanical Engineering, 2017, 53(3): 81-89). When the weft is inserted, the sley is stationary at the rear, and when the sley moves, the sword head cannot be within the swing range of the sley. Therefore, on a rapier loom with a sley-separated sword transmission mechanism, the remaining length of the steel reed is limited, and it should be shortened if it exceeds the limit. Since the sley is stationary at the rear position during weft insertion, a larger shed is not required, and the stroke of the weft beating is also reduced accordingly. With a lightweight sley, high-speed weaving can be achieved. The design of the sley-separated sword transmission mechanism allows the weft beating movement to be independent of other movements, which can achieve higher precision control and timing control. Independent drive motors may be used in such designs, especially when precise control of the force and speed of weft insertion is required. For example, a servo motor will provide better dynamic response and positioning accuracy. However, the conjugate cam sword transmission structure also faces the problems of many structural components, complex structure, cumbersome timing adjustment between the weft insertion mechanism and other mechanisms, and low reliability after long-term operation.

[0005] Of course, there are also mechanisms that directly fix the servo drive motor on the sley and connect it to the rapier wheel for weft insertion, such as the literature (Three-dimensional loom weft insertion system based on servo control [J]. Textile Machinery, 2014, (01): 14-18.). The servo drive motor of this mechanism swings with the sley and provides power to the rapier wheel to complete weft insertion. However, in this structure where the servo drive motor is fixed on the sley, the sley needs to swing periodically and complete the weft beating action according to the process requirements during the operation of the loom, so that the servo drive motor will be affected by impact vibration and large motion inertia, which can easily damage the encoder, mover and other precision components of the servo drive motor, thereby causing damage to the motor. At the same time, the mass of the sley will increase, which will increase the load of the weft beating device, increase the vibration of the loom, reduce the precision control of the high-speed control machine, and occupy a large space, affecting the flexibility of weft beating.

[0006] Therefore, it is of great significance to study a shock-absorbing servo sword transmission device for a sisal heavy-duty rapier loom to solve the problems existing in the prior art. Summary of the invention

[0007] The purpose of the invention is to solve the problems existing in the prior art and to provide a shock-proof servo rapier transmission device for a sisal heavy-duty rapier loom.

[0008] A shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom comprises a transmission mechanism, a universal joint and a rapier wheel; the transmission mechanism and the rapier wheel are connected via a plurality of universal joints, and any two adjacent universal joints are connected via a connecting rod.

[0009] As the preferred technical solution:

[0010] The shock-absorbing servo sword transmission device for a heavy-duty sisal rapier loom as described above also includes a sword transmission gear, and a sword transporting wheel is meshed with the sword transmission gear and fixed on the sley.

[0011] In the shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom as described above, the power source of the transmission mechanism is a servo motor.

[0012] As described above, a shock-absorbing servo sword transmission device for a sisal heavy-duty rapier loom, the servo motor is horizontally installed on a fixed bracket, the fixed bracket is connected to the frame of the rapier loom, and the fixed bracket is located in front of the sley, specifically, it can be a suitable position that does not affect other functions of the loom, the servo motor and the sley are separated from each other; the direction of the servo motor drive shaft points to the sley, when the sley swings to the front, the servo motor drive shaft and the sword transmission gear are coaxial.

[0013] In the shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom as described above, the servo motor transmission shaft is connected to the universal joint.

[0014] In the shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom as described above, the number of universal joints is at least 3, and the mutual combination of the universal joints is used to offset the displacement of the sley relative to the transmission motor when the sley moves.

[0015] As described above, a shock-absorbing servo sword transmission device for a sisal heavy-duty rapier loom, when the sley swings to the front, the universal joint connected to the servo motor drive shaft and the universal joint connected to the sword wheel are on the same horizontal line and are arranged coaxially, and the two connecting rods connected to the middle universal joint are arranged in a V shape; when the sley swings backward, the universal joint connected to the sword wheel tilts as the sley swings backward, the universal joint connected to the servo motor drive shaft is fixed, and the V-shaped angle between the two connecting rods connected to the middle universal joint gradually increases.

[0016] Principle of the invention:

[0017] In the prior art sword transmission mechanism design, the entire sword transmission device including the servo motor is fixed on the sley, and the sley will produce violent vibrations during periodic swinging and beating, which will cause the sword transmission device to vibrate, thereby affecting the stability and transmission accuracy of the entire system. At the same time, the increased load on the sley makes it difficult to increase the weaving speed, and in particular, the servo motor will be damaged due to continuous vibration. The shock-absorbing servo sword transmission device for a sisal heavy-duty rapier loom of the present invention introduces a universal joint mechanism design, and part of the sword transmission device including the servo motor no longer needs to be directly fixed on the sley, but is flexibly connected to the sword transmission gear and the sword wheel through a universal joint, and is installed on an independent fixed bracket. This design realizes the separation of the power source (servo motor) of the sword transmission device and the sley, so that the swing of the sley no longer causes vibration to the servo motor.

[0018] The design of the shock-absorbing servo sword transmission device not only improves the stability of the transmission system, but also reduces the mass of the sley after separating the servo motor from the sley, thereby reducing the vibration of the sley. After separation, it also avoids the mechanical stress and vibration transmission caused by the movement of the sley, thereby eliminating the vibration damage of the servo motor and extending the service life of the equipment. In addition, the use of universal joints further ensures that the power transmission between the sword transmission device and the servo motor is still smooth and accurate at different swing positions. This shock-absorbing servo design can effectively reduce the influence of angle deviation during the transmission process and ensure the stability of the loom when it is working efficiently.

[0019] Beneficial effects:

[0020] (1) The shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom of the present invention separates the servo transmission motor from the sley through a universal joint and a rapier wheel transmission. After the servo motor is separated from the sley, the mass of the sley is reduced, thereby reducing the vibration of the sley. In addition, the separation mechanism completely avoids the vibration of the servo motor, thereby completely solving the problem of damage to the servo transmission motor due to vibration and greatly improving the service life of the servo motor.

[0021] (2) The shock-absorbing servo sword transmission device for a heavy-duty sisal rapier loom of the present invention meets the requirements of a separate sword transmission system by only using three parts, namely, a transmission motor, a universal joint and a sword wheel. It has few moving parts, a simple structure, is easy to install and has high reliability. At the same time, since the transmission motor is essentially a servo motor, the rapier stroke can be easily modified.

[0022] (3) In the shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom of the present invention, when the sley swings back and forth, the angle of the middle part of the universal joint decreases or increases accordingly. Since the servo motor is fixed, the change in angle causes the horizontal relative displacement of the universal joint to change, thereby dynamically offsetting the relative displacement change between the sley and the servo motor, so as to realize the separation of the servo motor and the sley. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the principle diagram of the universal joint sword transmission device. In the figure, S represents the servo motor (SM), Z 1 Indicates the sword wheel, Z 2 It means the sword transmission gear;

[0024] Among them, 1-servo motor, 2.1-universal joint I, 2.2-universal joint II, 2.3-universal joint III, 3.1-connecting rod I, 3.1-connecting rod II, 4-sword transporting wheel, 5-sword transmitting gear, 6-slay. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0026] A shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom, comprising a transmission mechanism, a universal joint, a rapier wheel and a rapier transmission gear;

[0027] The sword transporting wheel is meshed with the sword transmission gear and fixed on the sley;

[0028] The power source of the transmission mechanism is a servo motor; the servo motor is horizontally mounted on a fixed bracket, the fixed bracket is connected to the frame of the rapier loom, and the fixed bracket is located in front of the sley, and the servo motor and the sley are separated from each other;

[0029] The servo motor drive shaft and the sword-moving wheel are connected via at least three universal joints, and any two adjacent universal joints are connected via a connecting rod;

[0030] The direction of the servo motor drive shaft points to the sley. When the sley swings to the front, the servo motor drive shaft is coaxial with the sword transmission gear. The universal joint connected to the servo motor drive shaft and the universal joint connected to the sword-moving wheel are on the same horizontal line and are arranged coaxially and separately. The two connecting rods connected to the middle universal joint are arranged in a V shape. When the sley swings backward, the universal joint connected to the sword-moving wheel tilts as the sley swings backward, the universal joint connected to the servo motor drive shaft is fixed, and the V-shaped angle between the two connecting rods connected to the middle universal joint gradually increases.

[0031] The following uses a specific embodiment to illustrate a shock-absorbing servo rapier transmission device for a sisal heavy-duty rapier loom of the present invention, which is as follows:

[0032] A shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom, such as Figure 1 As shown, it includes a transmission mechanism, a universal joint 2, a sword-transmitting wheel 4 and a sword-transmitting gear 5;

[0033] The sword transporting wheel 4 meshes with the sword transmission gear 5 and is fixed on the sley 6;

[0034] The power source of the transmission mechanism is a servo motor 1; the servo motor 1 is horizontally mounted on a fixed bracket, the fixed bracket is connected to the frame of the rapier loom, and the fixed bracket is located in front of the sley 6, and the servo motor 1 and the sley 6 are separated from each other;

[0035] The servo motor drive shaft is connected to the sword wheel 4 through three universal joints 2, which are respectively denoted as universal joint I 2.1, universal joint II 2.2 and universal joint III 2.3.

[0036] Universal joint Ⅰ 2.1 and universal joint Ⅱ 2.2 are connected by connecting rod Ⅰ 3.1, and universal joint Ⅱ 2.2 and universal joint Ⅲ 2.3 are connected by connecting rod Ⅱ 3.2;

[0037] The direction of the servo motor drive shaft points to the sley 6. When the sley 6 swings to the front, the servo motor drive shaft is coaxial with the sword transmission gear 5. The universal joint I 2.1 connected to the servo motor drive shaft and the universal joint III 2.3 connected to the sword transmission wheel 4 are on the same horizontal line and coaxially separated. The two connecting rods connected to the universal joint II 2.2 are arranged in a V shape.

[0038] When the sley 6 swings backward, the universal joint III 2.3 connected to the sword wheel 4 tilts as the sley 6 swings backward, the universal joint I 2.1 is fixed, and the V-shaped angle between the two connecting rods connected to the universal joint II 2.2 gradually increases.

[0039] Specific usage process: during weft insertion, the transmission motor 1 is powered on to output torque to drive the universal joint Ⅰ 2.1 to rotate, and the universal joint Ⅰ 2.1 drives the connecting rod Ⅰ 3.1, the universal joint 2.2, the connecting rod ⅠⅠ 3.2 and the universal joint ⅠⅠⅠ 2.3 to rotate in turn, and outputs the torque to the sword wheel 4, and the sword wheel 4 engages with the sword transmission gear 5 to drive the rapier to move; at the same time, during the weft beating process of the sley 6, the universal joint continuously changes its position and angle to offset the position change of the sley 6 relative to the servo motor 1, so that the torque can be stably output without changing the position of the servo motor 1, thereby realizing the separation of the servo motor 1 and the sley 6.

Claims

1. A shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom, characterized in that: It includes a transmission mechanism, a universal joint and a sword-moving wheel; the transmission mechanism and the sword-moving wheel are connected through a plurality of universal joints, and any two adjacent universal joints are connected through a connecting rod.

2. The shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom according to claim 1, characterized in that: It also includes a sword transmission gear, and the sword transport wheel is meshed with the sword transmission gear and fixed on the sley.

3. The shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom according to claim 2, characterized in that: The power source of the transmission mechanism is a servo motor.

4. The shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom according to claim 3, characterized in that: The servo motor is horizontally installed on a fixed bracket, which is connected to the frame of the rapier loom and is located in front of the sley. The servo motor and the sley are separated from each other. The direction of the servo motor drive shaft points to the sley. When the sley swings to the front, the servo motor drive shaft is coaxial with the rapier gear.

5. The shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom according to claim 4, characterized in that: The servo motor drive shaft is connected to the universal joint.

6. The shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom according to claim 5, characterized in that: The number of universal joints is at least 3.

7. The shock-absorbing servo rapier transmission device for a heavy-duty sisal rapier loom according to claim 6, characterized in that: When the sley swings to the front, the universal joint connected to the servo motor drive shaft and the universal joint connected to the sword wheel are on the same horizontal line and are arranged coaxially, and the two connecting rods connected to the middle universal joint are arranged in a V shape; when the sley swings backward, the universal joint connected to the sword wheel tilts as the sley swings backward, the universal joint connected to the servo motor drive shaft is fixed, and the V-shaped angle between the two connecting rods connected to the middle universal joint gradually increases.

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