Take-up and pay-off mechanism with tension control

Abstract

The utility model provides a winding and unwinding mechanism with tension control, which comprises an unwinding mechanism, the unwinding mechanism comprises a motor and is arranged on a shell, the driving end of the motor is provided with a tension sensor and is connected with a roll shaft through the tension sensor, the roll shaft is provided with an unwinding disc, a flexible material wire wound on the unwinding disc penetrates through the unwinding disc, and the winding and unwinding mechanism is connected with the winding and unwinding mechanism. The feeding mechanism is arranged on the shell, wound on a tension adjusting wheel and conveyed into the fusion printing nozzle through the tension adjusting wheel, and a sliding adjusting mechanism is installed on the shell located on one side of the feeding mechanism. The tension sensor is matched with the tension adjusting wheel for use, when the tension sensor detects the tension, and the tension is too large or too small, a control system of the full-automatic laser printer adjusts the rotating speed and the torque of the motor in time according to the feedback of the tension sensor, and then the traction force of the flexible wire is changed; and therefore, stable supply of the flexible wires in the printing process is ensured, and the quality of finished products is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser printing, and particularly relates to a feeding and discharging mechanism with tension control. Background Art

[0002] Laser printer technology is actually a general term for a series of rapid prototyping technologies. Their basic principle is layer manufacturing. The rapid prototyping machine forms the cross-sectional shape of the workpiece by scanning in the X-Y plane, and makes a discontinuous displacement of the layer thickness in the Z coordinate, finally forming a three-dimensional part. Currently, the rapid prototyping technologies on the market are usually SL stereolithography technology, SLS selective laser sintering, etc.

[0003] The desktop flexible material full-automatic laser printer cannot adjust the tension. During printing, since flexible materials are usually softer than rigid materials and have higher elasticity and ductility. When the flexible material is in the wire state, it is easy to bend, resulting in unsmooth feeding, blockage, and even situations of too much or too little material during printing.

[0004] In view of this, how to solve the defects existing in the prior art has become one of the problems to be urgently solved in the technical field of laser printing. Summary of the Utility Model

[0005] In view of the problems existing in the background art, on the one hand, the utility model provides a feeding and discharging mechanism with tension control, which includes a housing and a discharging mechanism installed on the housing. The discharging mechanism includes a motor, and the motor is installed on the housing. A tension sensor is installed at the driving end of the motor and is connected to a roller shaft through the tension sensor. A discharging disc for winding a flexible wire is installed on the roller shaft. The flexible material wire wound on the discharging disc passes through the discharging disc and is wound on a tension adjusting wheel, and is conveyed to the inside of a melting printing nozzle through the tension adjusting wheel. A sliding adjusting mechanism is installed on the housing on one side of the discharging mechanism.

[0006] Optionally, the sliding adjusting mechanism includes a guide rail mounting seat, and the guide rail mounting seat is installed on the housing. A guide rail is provided on the guide rail mounting seat, and a sliding clamping mechanism that can slide on the guide rail is installed on the guide rail; and the sliding clamping mechanism is located between the discharging mechanism and the tension adjusting wheel.

[0007] Optionally, the sliding clamping mechanism includes a slider, a clamp is installed on the slider, a conduit for guiding the flexible wire is provided on the clamp, and a guiding hole for guiding the flexible wire out is opened on the clamp.

[0008] Optionally, a motor is further included inside the gripper. The driving end of the motor is connected to a large gear shaft through a bearing assembly. A large gear is mounted on the large gear shaft. The large gear is meshed and connected to a small gear, and the small gear is mounted on a small gear shaft.

[0009] Optionally, a second clamping wheel and a first clamping wheel are mounted on the large gear shaft and the small gear shaft respectively. A gap for the flexible wire to pass through is provided between the first clamping wheel and the second clamping wheel, and the gap is 5-15 mm.

[0010] In summary, the beneficial effects of the present utility model are as follows:

[0011] 1. In the present utility model, the tension sensor is used in cooperation with the tension adjusting wheel. When the tension sensor detects the tension, when the tension is too large or too small, the control system of the full-automatic laser printer adjusts the rotation speed and torque of the motor in a timely manner according to the feedback of the tension sensor, thereby changing the traction force of the flexible wire. Moreover, through the cooperation of the tension adjusting wheel, the stable supply of the flexible wire during the printing process is ensured, and the quality of the finished product is improved.

[0012] 2. In the present utility model, the slider drives the gripper to move on the guide rail, thereby adjusting the distance between the gripper and the tension adjusting wheel and the feeding mechanism, and further adjusting the path and bending angle of the flexible wire, so as to adjust the tension of the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a wire feeding and discharging mechanism with tension control according to the present utility model;

[0014] Figure 2 It is a schematic diagram of a partial structure of an embodiment of a wire feeding and discharging mechanism with tension control according to the present utility model;

[0015] Figure 3 It is a schematic diagram of a partial structure of a sliding clamping mechanism of an embodiment of a wire feeding and discharging mechanism with tension control according to the present utility model;

[0016] Figure 4 It is a schematic diagram of the structure of a feeding mechanism of an embodiment of a wire feeding and discharging mechanism with tension control according to the present utility model;

[0017] Figure 5 It is a schematic diagram of the internal structure of a gripper of an embodiment of a wire feeding and discharging mechanism with tension control according to the present utility model.

[0018] REFERENCE SIGNS:

[0019] 100, full-automatic laser printer;

[0020] 10, feeding mechanism; 101, motor; 102, roller shaft; 103, feeding disk; 104, tension sensor

[0021] 20. Tension adjusting wheel;

[0022] 30. Housing;

[0023] 401. Guide rail;

[0024] 402. Sliding clamping mechanism;

[0025] 403. Guide rail mounting seat;

[0026] 404. Slide block;

[0027] 405. Clamp;

[0028] 4051. Motor; 4052. Pinion; 4053. Pinion shaft; 4054. First clamping wheel; 4055. Big gear shaft; 4056. Second clamping wheel; 4057. Big gear;

[0029] 406. Conduit;

[0030] 701. First horizontal movement mechanism;

[0031] 702. Melting printing nozzle;

[0032] 703. Second horizontal movement mechanism. Detailed implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Although exemplary embodiments are disclosed in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present utility model and to convey the concept of the present utility model completely to those skilled in the art.

[0034] In the description of this specification, the description of reference terms such as "certain embodiments", "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0035] In the present utility model, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", and "fixed" should all be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] As Figures 1-5 shown, this embodiment provides a rewinding and feeding mechanism 100 with tension control, including a housing 30, and a first horizontal movement mechanism 701 and a second horizontal movement mechanism 703 are arranged inside the housing 30. A device for adjusting the position of the molten printing nozzle 702 is formed by combining the first horizontal movement mechanism 701 and the second horizontal movement mechanism 703; and the molten printing nozzle 702 is fixedly installed on the moving seat of the second horizontal movement mechanism 703.

[0037] In this embodiment, the first horizontal movement mechanism 701 and the second horizontal movement mechanism 703 can be composed of a lead screw and a stepping motor, or other horizontal translation mechanisms that can achieve the X or Y direction position of the molten printing nozzle 702 can be used. Since the horizontal movement mechanism is a prior art, no detailed description will be given here.

[0038] Furthermore, a motor 101 is fixedly installed on the side end face of the housing 30 by a fixed connection method such as fastening screws. The motor 101 is preferably a rotary motor, and a tension sensor 104 is installed at the driving end of the motor 101, and a roller shaft 102 is connected through the tension sensor 104.

[0039] Furthermore, the tension sensor 104 adopts a C203 series tension sensor with a non-movable shaft structure, and a bearing assembly is integrally arranged inside the tension sensor 104.

[0040] In this embodiment, precise tension measurement is performed through the tension sensor 104.

[0041] Furthermore, a feeding tray 103 is installed on the roller shaft 102, and a flexible wire is wound on the feeding tray 103.

[0042] By starting the motor 101, the roller shaft 102 is driven to rotate by the motor 101, and then the feeding tray 103 arranged on the roller shaft is driven to rotate for feeding.

[0043] Further, the flexible material wire wound around the unwinding reel 103 bypasses the unwinding reel and is wound around the tension adjustment wheel 20, and is conveyed into the internal part of the melting printing nozzle 702 through the tension adjustment wheel 20;

[0044] The tension adjustment wheel 20 is fixedly installed on the side end face of the housing 30 by means of fixed connection such as fastening screws.

[0045] In this embodiment, the tension sensor 104 is used in cooperation with the tension adjustment wheel 20. When the tension sensor detects the tension, when the tension is too large or too small, the control system of the full-automatic laser printer adjusts the rotation speed and torque of the motor in a timely manner according to the feedback of the tension sensor, so as to change the traction force of the flexible wire, and through the cooperation of the tension adjustment wheel, further ensure the stable supply of the flexible wire during the printing process and improve the finished product quality.

[0046] The desktop full-automatic laser printer for flexible materials cannot adjust the tension. During printing, since flexible materials are usually softer than rigid materials and have higher elasticity and ductility. As a result, the flexible material is prone to bending in the wire state, resulting in unsmooth feeding, blockage, and even situations of too much or too little material during printing. To solve the above technical problems, please refer to Figures 1-5 As shown, a guide rail mounting seat 403 is fixedly installed on the housing 30 located on one side of the feeding mechanism 10 by means of fixed connection such as fastening screws. A guide rail 401 is provided on the guide rail mounting seat 403, and a sliding clamping mechanism 402 that can slide on the guide rail 401 is installed on the guide rail 401; and the sliding clamping mechanism 402 is located between the feeding mechanism and the tension adjustment wheel 20.

[0047] Further, the sliding clamping mechanism 402 includes a slider 404. The slider 404 is preferably an electric slider of the MSA25S series. By starting the slider 404, the slider 404 is driven to move linearly on the guide rail 401.

[0048] Further, a clamp 405 is fixedly installed on the side end face of the slider 404 by means of fastening screws. A conduit 406 for guiding the flexible wire to be introduced is provided on the clamp 405, and a guiding hole for guiding the flexible wire to be exported is provided on the clamp 405.

[0049] In this embodiment, the flexible wire wound around the unwinding reel extends into the clamp 405 through the conduit 406 and is clamped by the clamp 405, thereby improving the accuracy of the material transmission trajectory.

[0050] Further, please refer to Figure 5As shown, the gripper 405 further includes a motor 4051. The motor 4051 is preferably a small motor, and the driving end of the motor 4051 is connected to the large gear shaft 4055 through a bearing assembly. A large gear 4057 is mounted on the large gear shaft 4055. The large gear 4057 is meshed with a small gear 4052, and the small gear 4052 is mounted on a small gear shaft 4053.

[0051] Further, a second clamping wheel 4055 and a first clamping wheel 4054 are respectively and fixedly mounted on the large gear shaft 4055 and the small gear shaft 4053 through positioning pins. A gap for the flexible wire to pass through is provided between the first clamping wheel 4054 and the second clamping wheel 4055, and the gap is 5 - 15 mm.

[0052] In this embodiment, when the flexible wire passes through the gap between the first clamping wheel 4054 and the second clamping wheel 4055, the outer wall of the flexible wire abuts against the first clamping wheel and the second clamping wheel respectively at this time.

[0053] In this embodiment, the slider drives the gripper to move on the guide rail, thereby adjusting the distance between the gripper and the tension adjusting wheel and the feeding mechanism, further adjusting the path and bending angle of the flexible wire, and thus adjusting the tension of the wire.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A pay-off and take-up mechanism with tension control, characterized in that, It includes a housing and a material feeding mechanism installed on the housing. The material feeding mechanism includes a motor, and the motor is installed on the housing. A tension sensor is installed at the driving end of the motor, and a roller shaft is connected through the tension sensor. A material feeding disk for winding a flexible wire is installed on the roller shaft. The flexible material wire wound on the material feeding disk passes through the material feeding disk and is wound on a tension adjusting wheel, and is conveyed to the inside of a melting printing nozzle through the tension adjusting wheel. A sliding adjusting mechanism is installed on the housing on one side of the material feeding mechanism.

2. The material winding and unwinding mechanism with tension control according to claim 1, wherein the sliding adjusting mechanism includes a guide rail mounting seat, and the guide rail mounting seat is installed on the housing. A guide rail is provided on the guide rail mounting seat, and a sliding clamping mechanism that can slide on the guide rail is installed on the guide rail; and the sliding clamping mechanism is located between the material feeding mechanism and the tension adjusting wheel.

3. The material winding and unwinding mechanism with tension control according to claim 2, wherein the sliding clamping mechanism includes a slider, a clamp is installed on the slider, a conduit for guiding the flexible wire is provided on the clamp, and a guiding hole for guiding the flexible wire out is provided on the clamp.

4. The material winding and unwinding mechanism with tension control according to claim 3, wherein a motor is further included in the clamp. The driving end of the motor is connected to a large gear shaft through a bearing assembly. A large gear is installed on the large gear shaft. The large gear is meshed and connected to a small gear, and the small gear is installed on a small gear shaft.

5. The material winding and unwinding mechanism with tension control according to claim 4, wherein a second clamping wheel and a first clamping wheel are installed on the large gear shaft and the small gear shaft, and a gap for the flexible wire to pass through is provided between the first clamping wheel and the second clamping wheel, and the gap is 5 - 15 mm.

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