Multi-section tension adjusting mechanism of servo tensioner

Abstract

A multi-section tension adjusting mechanism of a servo tensioner comprises a motor, an adjusting sliding block, a rotating block and a tension adjusting frame. The rotating block and the tension adjusting frame are coaxially and fixedly arranged on a rotating shaft of the tension spring rod and rotate synchronously. The adjusting sliding block is in transmission connection with an output shaft of the motor and is driven by the motor to do linear reciprocating motion in the axial direction of the output shaft. The transmission end of the rotating block is rotationally positioned on the adjusting sliding block, and the rotating block is driven to rotate through the movement of the adjusting sliding block; the acting end of the tension adjusting frame abuts against the tension spring rod, and when the tension adjusting frame rotates and applies pressure to the tension spring rod through the acting end, the tension spring rod is forced to rotate and pull the tension spring. By means of the innovative structural design, gaps existing between matching pieces in a traditional scheme are eliminated, the tension control precision is further guaranteed, meanwhile, a force arm can be increased by lengthening the length of the rotating block, the requirement for the performance of an adjusting motor is reduced, and cost controllability is achieved.

Description

Technical Field

[0001] The utility model relates to the field of tension control, in particular to a multi-stage tension adjustment mechanism of a servo tensioner. Background Art

[0002] At present, in the winding process of producing motor stators, small transformers, relay coils, etc., winding machines and tensioners are usually required. The function of the tensioner is to keep the winding machine at appropriate tension during the winding process, so that the wound coil is appropriately tight and full.

[0003] The tension adjustment mechanism is an important component for adjusting the winding tension of the tensioner. Currently, most of the tension rods on the market are adjusted using a worm gear structure and a rack and pinion structure. The problems are as follows:

[0004] 1. The adjustment accuracy is poor. The main reason is that no matter it is a worm gear structure or a rack and pinion structure, a certain gap needs to be left between the mating parts to work properly and ensure the service life. However, because the gap is retained, the tension control accuracy is affected;

[0005] 2. The requirements for motor torque and speed are high. When corresponding to large tension control, the tension adjustment motor is often larger in size. In addition, the requirements for speed increase the material cost.

[0006] Therefore, how to solve the above-mentioned deficiencies in the prior art has become a topic to be studied and solved in the present invention. Summary of the invention

[0007] The utility model aims to provide a multi-stage tension adjustment mechanism for a servo tensioner.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A multi-stage tension adjustment mechanism of a servo tensioner, comprising a motor, an adjustment slider, a rotating block and a tension adjustment frame;

[0010] The rotating block and the tension adjustment frame are coaxially fixed on the rotating shaft of the tension spring rod, and the two rotate synchronously;

[0011] The adjusting slider is connected to the output shaft of the motor and driven by the motor to make linear reciprocating motion along the axial direction of the output shaft; the driving end of the rotating block is rotatably positioned on the adjusting slider, and the rotating block is driven to rotate by the movement of the adjusting slider;

[0012] The active end of the tension adjustment frame abuts against the tension spring rod. When the tension adjustment frame rotates and applies pressure to the tension spring rod through the active end, the tension spring rod is forced to rotate and pull the tension spring.

[0013] According to a further technical solution, the motor is fixedly connected to the housing, the output shaft of the motor is a screw, and the adjusting slider is threadedly matched with the screw.

[0014] A further technical solution includes a mounting block, the mounting block being fixedly connected to the housing of the tensioner;

[0015] A guide rod is connected between the mounting block and the motor, and the guide rod is parallel to the lead screw.

[0016] A further technical solution also includes two limit switches, which are respectively arranged corresponding to the front and rear movement limit positions of the adjusting slider.

[0017] According to a further technical solution, the shaft seat of the tension spring rod is installed on the housing, and the rotating shaft of the tension spring rod is installed on the shaft seat.

[0018] According to a further technical solution, an elongated slot hole is provided on the rotating block, and the length direction of the elongated slot hole corresponds to the length direction of the rotating block; an adjusting roller is provided on the side of the adjusting slider, and the outer circle of the adjusting roller is tangent to the inner wall of the elongated slot hole.

[0019] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0020] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0021] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0022] The working principle and advantages of this utility model are as follows:

[0023] 1. The utility model eliminates the gap between the matching parts in the traditional solution through innovative structural composition design, thereby ensuring the control accuracy of the tension.

[0024] 2. The utility model can increase the lever arm by lengthening the length of the rotating block, thereby reducing the requirements for adjusting the motor performance, and the changes in processing cost and material cost can be basically ignored. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Attached Figure 1 This is a front structural schematic diagram of a tensioner according to an embodiment of the utility model;

[0026] Attached Figure 2 This is a schematic diagram of the back structure of the tensioner according to an embodiment of the utility model;

[0027] Attached Figure 3 The three-dimensional embodiment of the utility model Figure 1 (frontal angle);

[0028] Attached Figure 4 The three-dimensional embodiment of the utility model Figure 2 (Back face angle).

[0029] In the above drawings: A. tension adjustment mechanism; 1. tension rod; 2. tension spring rod; 3. housing; 4. tension spring; 5. motor; 6. adjustment slider; 7. rotating block; 8. tension adjustment frame; 9. rotating shaft; 10. output shaft; 11. mounting block; 12. guide rod; 13. limit switch; 14. shaft seat; 15. long slot; 16. adjustment roller. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0031] Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0032] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0033] See attached Figure 1 As shown, a servo tensioner multi-stage tension adjustment mechanism, the tensioner includes a tension rod 1 and a tension spring rod 2, both of which are rotatably assembled relative to a housing 3 of the tensioner, and the rotation axes of the two are parallel; it also includes at least one tension spring 4, and the tension spring 4 acts between the tension rod 1 and the tension spring rod 2.

[0034] like Figures 2~4 As shown, the tension adjustment mechanism includes a motor 5, an adjustment slider 6, a rotating block 7 and a tension adjustment frame 8.

[0035] The rotating block 7 and the tension adjusting frame 8 are coaxially fixed on the rotating shaft 9 of the tension spring rod 2, and the two rotate synchronously. The adjusting slider and the rotating block rotate synchronously, and the tension spring rod rotates alone.

[0036] The adjusting slider 6 is connected to the output shaft 10 of the motor 5 and driven by the motor 5 to make linear reciprocating motion along the axial direction of the output shaft 10; the driving end of the rotating block 7 is rotatably positioned on the adjusting slider 6, and the rotating block 7 is driven to rotate by the movement of the adjusting slider 6.

[0037] The active end of the tension adjustment frame 8 is against the tension spring rod 2. When the tension adjustment frame 8 rotates and applies pressure to the tension spring rod 2 through the active end, the tension spring rod 2 is forced to rotate and pull the tension spring 4, thereby pulling the tension rod 1 to increase the tension. Conversely, if the tension is to be reduced, the motor can be driven in the reverse direction to reduce or cancel the effect of the tension adjustment frame 8 on the tension spring rod 2, and finally the tension spring rod 2 acts on the tension rod 1 only through the natural contraction force of the tension spring 4.

[0038] Preferably, the motor 5 is fixedly connected to the housing 3, the output shaft 10 of the motor 5 is a screw, and the adjusting slider 6 is threadedly matched with the screw. Specifically, the screw and the adjusting slider 6 can be matched through a screw nut.

[0039] The motor 5 is a tension-adjusting screw motor, which is a closed-loop control circuit. The closed-loop control is realized by signal feedback through the encoder function component (magnetic encoder, optical encoder or Hall) installed on the motor 5. When the control circuit of the motor 5 and the motor 5 body are designed separately, the control circuit can be installed on the front side of the end of the output end of the motor 5 screw. The spacing and installation method between the control circuit and the output end of the screw are determined by the working principle requirements of the selected encoder function component, and are subject to this requirement. Since it is not the invention point of this case, it will not be described in detail in this case. When the motor 5 is an integrated structure, the motor control circuit will be contained inside the motor 5 and installed in an integrated manner with the motor 5 body.

[0040] Preferably, it also includes a mounting block 11, which is fixedly connected to the housing 3 of the tensioner; a guide rod 12 is connected between the mounting block 11 and the motor 5, and the guide rod 12 is parallel to the screw rod. This ensures that the adjustment slider 6 moves smoothly, and the end of the screw rod can be positioned on the mounting block 11 through a bearing.

[0041] Preferably, two limit switches 13 are further included, which are fixed relative to the housing 3 and are respectively arranged corresponding to the front and rear movement limit positions of the adjusting slider 6 to limit the travel of the adjusting slider 6.

[0042] Preferably, the shaft seat 14 of the tension spring rod 2 is mounted on the housing 3 , and the rotating shaft 9 of the tension spring rod 2 is mounted on the shaft seat 14 .

[0043] Preferably, an elongated slot 15 is provided on the transmission end of the rotating block 7, and the length direction of the elongated slot 15 corresponds to the length direction of the rotating block 7; an adjusting roller 16 (or bearing) is provided on the side of the adjusting slider 6, and the outer circle of the adjusting roller 16 is tangent to the inner wall of the elongated slot 15.

[0044] When the lead screw of the motor 5 rotates, the lead screw nut drives the adjusting slider 6 to move forward and backward, and also drives the adjusting roller 16 to move forward and backward. Since the inner wall of the slot hole is tangent to the outer circle of the adjusting roller 16, the rotating block 7 converts the forward and backward motion into rotational motion.

[0045] The working principle of this embodiment is summarized as follows:

[0046] When the output shaft 10 (screw) of the motor 5 rotates, the rotating block 7 rotates and swings back and forth accordingly, and simultaneously drives the tension adjustment frame 8 to rotate and swing in the opposite direction. Figure 1 As shown, when the tension adjustment frame 8 swings backward, it will push the tension spring rod 2 to swing backward, thereby exerting a pulling and stretching effect on the tension spring 4.

[0047] When the tension force is large, the tension spring rod 2 is swung backward to extend the tension spring 4. When the tension force is small, the tension spring rod 2 is swung forward to contract the tension spring 4.

[0048] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A multi-stage tension adjustment mechanism for a servo tensioner, characterized in that: It includes a motor, an adjusting slide block, a rotating block and a tension adjusting frame; The rotating block and the tension adjustment frame are coaxially fixed on the rotating shaft of the tension spring rod, and the two rotate synchronously; The adjusting slider is drivingly connected to the output shaft of the motor and driven by the motor to perform linear reciprocating motion along the axial direction of the output shaft; The transmission end of the rotating block is rotatably positioned on the adjusting slider, and the rotating block is driven to rotate by the movement of the adjusting slider; The active end of the tension adjustment frame abuts against the tension spring rod. When the tension adjustment frame rotates and applies pressure to the tension spring rod through the active end, the tension spring rod is forced to rotate and pull the tension spring.

2. A servo tensioner multi-stage tension adjustment mechanism according to claim 1, characterized in that: The motor is fixed in the housing, the output shaft of the motor is a screw rod, and the adjusting slider is threadedly matched with the screw rod.

3. A servo tensioner multi-stage tension adjustment mechanism according to claim 2, characterized in that: It also includes a mounting block, which is fixedly connected to the housing of the tensioner; A guide rod is connected between the mounting block and the motor, and the guide rod is parallel to the lead screw.

4. A servo tensioner multi-stage tension adjustment mechanism according to claim 1, characterized in that: It also includes two limit switches, which are respectively arranged at the front and rear movement limit positions of the adjusting slider.

5. The multi-stage tension adjustment mechanism of a servo tensioner according to claim 1, characterized in that: The shaft seat of the tension spring rod is installed on the casing, and the rotating shaft of the tension spring rod is installed on the shaft seat.

6. A servo tensioner multi-stage tension adjustment mechanism according to claim 1, characterized in that: The rotating block is provided with an elongated slot, the length direction of which corresponds to the length direction of the rotating block; the side of the adjusting slider is provided with an adjusting roller, the outer circle of which is tangent to the inner wall of the elongated slot.

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