Tension machine with high-speed and low-speed winding and unwinding functions

Abstract

The utility model discloses a tension machine with a high-low-speed winding and unwinding function, belongs to the technical field of tension adjusting mechanisms, and aims to provide a self-adaptive high-low-speed winding and unwinding tension machine which comprises a fixed rack, the fixed rack is provided with a pair of side plates, and two traction wheels with parallel axes are rotationally connected between the two side plates; each traction wheel comprises a transmission shaft fixedly connected with the output end of the driver, a wheel disc is sleeved outside the transmission shaft, a central shaft hole is formed in the wheel disc, a key groove is formed in the side wall of the central shaft hole, the opposite inner walls of the key groove are respectively provided with a pressure sensor, and a flat key is arranged on the side face of the transmission shaft and is suitable for being inserted into the key groove. And the pressure sensor is arranged between the two pressure sensors. By arranging the sensor component between the transmission shaft of the traction wheel and the wheel disc, the tension change of the contact part of the cable and the wheel disc can be sensed, so that adaptive speed adjustment is realized in cooperation with the servo motor under closed-loop control of the processor, and the stable tensioning state of the cable can be kept.

Description

Technical Field

[0001] This application relates to the field of tension adjustment mechanism technology, and in particular to a tension machine with high and low speed release and retraction functions. Background Technology

[0002] Cable laying requires the use of a tension machine to ensure that the cable is pulled straight without breaking. However, existing tension machines require readjustment of the output torque when changing direction and speed. Therefore, after one readjustment, the laying speed is limited by the laying speed of the tension machine, making it difficult to speed up or slow down the laying speed during the process. Summary of the Invention

[0003] The purpose of this application is to provide a retractable tension machine that can adapt to high and low speeds.

[0004] To achieve the above objectives, this application provides a tension machine with high and low speed release and retraction functions: It includes a fixed frame with a pair of side plates. Two parallel traction wheels are rotatably connected between the two side plates. Two sets of drivers are disposed outside the side plates, driving the two traction wheels respectively. Each traction wheel includes a transmission shaft fixedly connected to the output end of the driver. A wheel disc is sleeved on the transmission shaft. The wheel disc has a central shaft hole. A keyway is formed on the side wall of the central shaft hole. A pressure sensor is disposed on the opposite inner wall of the keyway. A flat key is provided on the side of the transmission shaft, suitable for insertion into the keyway and located between the two pressure sensors. The fixed frame is connected to a movable frame via a cylinder. Two pressure rollers are rotatably connected inside the movable frame, cooperating with the two traction wheels respectively to apply pressure to the cable passing over the outer side of the traction wheels, thereby preventing the cable (i.e., the power cable) from moving relative to the traction wheels under strong tension.

[0005] As a preferred embodiment, the outer surface of the wheel is provided with a force-applying groove, the cross-section of which is a concave arc shape, and a friction pad is fixedly attached to the inner wall of the force-applying groove to enhance the contact friction between the outer surface of the wheel and the outer surface of the cable.

[0006] As a preferred embodiment, the main body of the drive shaft is an optical shaft, and the flat key is adapted to be embedded in a groove opened on the outer side of the optical shaft. The two side plates are provided with collinear first shaft holes at opposite positions, which are adapted to cooperate with the two ends of the optical shaft to form a rotating pair, thereby ensuring the operational stability of the traction wheel.

[0007] As a preferred embodiment, each of the drivers includes a servo motor and a reducer fixedly connected to the outer side of the side plate. The output end of the reducer is fixedly connected to one end of the optical shaft to achieve the transmission of high torque. The reducer typically uses a planetary gear structure with a large reduction ratio, thus enabling the torque to be amplified many times.

[0008] As a preferred embodiment, the two side plates on the side away from the movable frame are fixedly connected to a base, which is suitable for being fixedly connected to the carriage of an engineering vehicle by bolts, so as to facilitate the transfer of the tensioner.

[0009] As a preferred embodiment, the movable frame includes a pair of parallel guard plates, and the two pressure rollers are movably connected between the two guard plates. The two guard plates are fixedly connected by a bridge plate. Each pressure roller has a pressure-distributing groove on its outer side. The cross-section of the pressure-distributing groove is an inwardly concave arc shape, and an elastic pad is fixedly attached to the inner wall of the pressure-distributing groove to prevent the hard pressure roller from directly contacting the cable.

[0010] As a preferred embodiment, the outer side of the side plate is fixedly connected to an installation platform via a support frame, and the cylinder is fixedly connected to the installation platform; the two guard plates are provided with corresponding second shaft holes, and the two ends of the pressure wheel have coaxial end shafts, which are suitable for cooperating with the second shaft holes to form a rotating pair, thereby ensuring the stability of the pressure wheel on the movable frame.

[0011] As a preferred embodiment, the mounting platform is also provided with a guide rail, the guide rail including a guide rod fixedly connected to the mounting platform, the bottom of the side plate having a support plate, the support plate having a guide hole, suitable for cooperating with the guide rod to form a sliding pair, the end of the guide rod passing through the guide hole and fixedly connected with a limit ring; the movable end of the cylinder is connected to the support plate, and provides upward thrust and downward pull to the pressure wheel through the movable bracket.

[0012] Compared with the prior art, the beneficial effects of this application are as follows:

[0013] (1) By setting a sensor component between the drive shaft and the wheel of the traction wheel, the tension change at the contact point between the cable and the wheel can be sensed. Under the closed-loop control of the processor, the speed can be adjusted adaptively with the servo motor. The speed can be increased or decreased according to the actual cable release speed, while maintaining a stable tension of the cable.

[0014] (2) This design can not only perform passive speed adjustment, but also active speed adjustment. It can not only assist in laying out the cable during the wiring process, but also assist in the recycling process, thereby improving the recycling efficiency of the cable and the neatness of the cable drum. Attached Figure Description

[0015] Figure 1 This is a first three-dimensional schematic diagram of the overall structure of the tension machine with high and low speed release and take-up functions.

[0016] Figure 2 This is a second three-dimensional schematic diagram of the overall structure of the tension machine with high and low speed release and take-up functions.

[0017] Figure 3 A three-dimensional structural diagram of the traction wheel and drive unit of the tension machine with high and low speed release and take-up functions, configured on a fixed frame.

[0018] Figure 4 This is a three-dimensional sectional view of the tension machine with high and low speed winding and unwinding functions, showing the interaction between the traction wheel and the fixed frame.

[0019] Figure 5 This is a three-dimensional sectional view of the wheel structure of the tension machine with high and low speed release and take-up functions.

[0020] Figure 6 This is a three-dimensional structural diagram of the drive shaft of the tension machine with high and low speed winding and unwinding functions.

[0021] Figure 7 This is a three-dimensional sectional view of the fixed frame of the tension machine with high and low speed winding and unwinding functions.

[0022] Figure 8 This is a three-dimensional structural diagram showing the connection between the movable frame and the mounting platform of the tension machine with high and low speed release and take-up functions.

[0023] Figure 9 This is a three-dimensional cross-sectional view of the pressure roller of the tension machine with high and low speed retraction and extension functions.

[0024] Figure 10 This is a three-dimensional structural diagram of the movable frame of the tension machine with high and low speed winding and unwinding functions.

[0025] In the diagram: 1. Fixed frame; 101. Base; 102. Side plate; 103. Mounting platform; 104. Support frame; 105. First shaft hole; 2. Movable frame; 201. Support plate; 202. Guard plate; 203. Guide hole; 204. Second shaft hole; 205. Bridge plate; 3. Guide rail; 301. Guide rod; 302. Limiting ring; 4. Cylinder; 5. Traction wheel; 510. Drive shaft; 511. Optical shaft; 512. Flat key; 520. Wheel; 521. Central shaft hole; 522. Keyway; 523. Force application groove; 524. Friction pad; 525. Pressure sensor; 6. Pressure wheel; 601. Pressure distribution groove; 602. Elastic pad; 603. End shaft; 7. Driver; 701. Servo motor; 702. Reducer. Detailed Implementation

[0026] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0028] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0029] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0030] like Figure 1-10 The tension machine shown has high and low speed retraction and release functions, including a fixed frame 1. The fixed frame 1 has a pair of parallel side plates 102. The two side plates 102 are fixedly connected to a base 101 on the side away from the movable frame 2. The base 101 is usually located at the bottom of the side plates 102 and can be fixedly connected to the carriage of the engineering vehicle by bolts or other connecting parts, which facilitates position transfer.

[0031] Two parallel traction wheels 5 are rotatably connected between the two side plates 102. Typically, the two traction wheels 5 are of the same specification, with their axes on the same horizontal plane and aligned at both ends. Each traction wheel 5 includes a drive shaft 510 fixedly connected to the output end of the driver 7. The drive shaft 510 is located in the center of the traction wheel 5 and is collinear with the axis of the traction wheel 5. A coaxial wheel disc 520 is fitted around the drive shaft 510. To cooperate with the drive shaft 510, a central shaft hole 521 penetrating both ends is formed on the wheel disc 520. A keyway 522 is formed on the side wall of the central shaft hole 521. A pressure sensor 525 is respectively installed on the opposite inner wall of the keyway 522. The two pressure sensors 525 are symmetrical and are typically battery-powered and use wireless communication. The side of the drive shaft 510 has a flat key 512, which fits perfectly into the keyway 522 and is located between two pressure sensors 525. The side of the flat key 512 applies pressure to the pressure sensors 525, thereby determining the cable tension passing around the wheel 520 through a proportional relationship. The main body of the drive shaft 510 is a cylindrical optical shaft 511. The flat key 512 can be embedded in the groove opened on the outer side of the optical shaft 511, so that it can be easily replaced after the flat key 512 wears out. The two side plates 102 have collinear first shaft holes 105 in opposite positions, which are used to cooperate with the two ends of the optical shaft 511 to form a rotating pair, thereby limiting the position of the traction wheel 5. A bearing structure is usually installed in the first shaft hole 105, which can effectively reduce the rotational resistance of the optical shaft 511.

[0032] Two sets of drivers 7 are provided on the outside of the side plate 102. The two sets of drivers 7 are connected to the same controller, but work independently and drive the two traction wheels 5 respectively. Each driver 7 includes a servo motor 701 and a reducer 702 fixedly connected to the outer side of the side plate 102. The output end of the servo motor 701 is connected to the input end of the reducer 702, which can precisely control the output speed. The output end of the reducer 702 is fixedly connected to one end of the optical shaft 511, thereby driving the rotation of the traction wheel 5.

[0033] A fixed frame 1 is connected to a movable frame 2 via a cylinder 4. The cylinder 4 can drive the movable frame 2 to move up and down. The movable frame 2 includes a pair of parallel guard plates 202, both of which are vertical. Two pressure rollers 6 are movably connected between the two guard plates 202, and the two guard plates 202 are fixedly connected by a bridge plate 205. The bridge plate 205 is divided into two parts, located above the pressure rollers 6 respectively, which can shield and protect the pressure rollers 6. A horizontal mounting platform 103 is fixedly connected to the outer side of the side plate 102 via a support frame 104. The cylinder 4 is fixedly connected to the mounting platform 103. Since there are two mounting platforms 103, there are also two cylinders 4. A guide rail 3 is also provided on the mounting platform 103. Specifically, the guide rail 3 includes a guide rod 301 fixedly connected to the mounting platform 103. The length of the guide rod 301 is parallel to that of the mounting platform 103, meaning that the guide rod 301 extends vertically. Typically, there are two guide rods 301 on a mounting platform 103. The cylinder 4 is located between the two guide rods 301. The bottom of the vertical side plate 102 has a horizontal support plate 201. The support plate 201 has guide holes 203, which cooperate with the guide rods 301 to form a sliding pair. There are a total of four guide rods 301, and four corresponding guide holes 203. The end of each guide rod 301 passes through the guide hole 203 and is fixedly connected to a limit ring 302 to limit the maximum range of motion of the movable frame 2 and prevent the movable frame 2 from detaching from the guide rod 301. The movable end of the cylinder 4 is connected to the support plate 201, which can provide upward thrust and downward pull to the movable frame 2.

[0034] Two pressure rollers 6 are rotatably connected inside the movable frame 2. The axes of the two pressure rollers 6 are parallel and in the same horizontal plane. Corresponding second shaft holes 204 are provided on the two guard plates 202. Each pressure roller 6 has a coaxial end shaft 603 at both ends, which cooperates with the second shaft holes 204 to form a rotating pair. In fact, the two end shafts 603 on the same pressure roller 6 are integral, with bearings fitted externally to cooperate with the main body of the pressure roller 6 to reduce rotational friction. This is a conventional design and is not shown in the attached diagram. The two pressure rollers 6 cooperate with two traction rollers 5 respectively, thereby applying pressure to the cable passing over the outer side of the traction roller 5, ensuring sufficient contact friction between the cable and the outer surface of the traction roller 5. Each pressure roller 6... Each side has a pressure-distributing groove 601. The cross-section of the pressure-distributing groove 601 is a concave arc shape, similar to the curvature of the outer side of the cable. This allows for full contact with the outer side of the cable to reduce local pressure, thus ensuring a high degree of flatness on the outer side of the cable. The inner wall of the pressure-distributing groove 601 is fixedly attached with a rubber elastic pad 602, which effectively prevents the metal pressure roller 6 from making hard contact with the outer surface of the cable. The outer side of the wheel 520 has a force-applying groove 523. The cross-section of the force-applying groove 523 is also a concave arc shape, which is also for full contact with the outer surface of the cable. The inner wall of the force-applying groove 523 of the wheel 520 is fixedly attached with a friction pad 524, also made of rubber, to enhance the contact friction between the wheel 520 and the outer surface of the cable.

[0035] Working principle: In the initial state, cylinder 4 extends, pushing the movable frame 2 to its upper limit, allowing a single cable to pass between the movable frame 2 and the fixed frame 1, and resting in the force-applying groove 523 on the top of the two discs 520. Then, cylinder 4 retracts, and the movable frame 2 descends until the cable contacts the elastic pad 602 in the pressure-distributing groove 601 on the side of the pressure roller 6, and is pressed into the force-applying groove 523 by the elastic pad 602. This activates the two sets of drives 7, causing the two traction rollers 5 to rotate at the same speed. Since the two traction rollers 5 are of the same specification, the linear velocity of the discs 520 in contact with the cable is the same. However, the tension applied to the cable by the two discs 520 through the friction pad 524 is different. For example, when the cable is guided from left to right, the torque output by the left disc 520 is less than the torque output by the right disc 520. The cable is located between the two discs 520. The section between 0 and 1 is stretched, generating tension and becoming straighter, preparing for wiring on the iron frame. The magnitude of this torque can be captured by a pressure sensor 525 located between the wheel 520 and the drive shaft 510. The pressure value captured by the pressure sensor 525 is fed back to the processor, which calculates the tension on the cable. The processor then controls the output power of the two sets of drivers 7 to change the output torque of the wheel 520, thus forming a closed-loop control. When the cable feeding speed changes, the pressure value fed back by the pressure sensor 525 also changes. The processor then controls the servo motor 701 to speed up or slow down to ensure the tension of the cable between the two wheels 520. Similarly, when the cable needs to be retracted, the driver 7 outputs in the opposite direction. Under the monitoring of the other two pressure sensors 525, precise and stable control can also be achieved.

[0036] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A tension machine with high and low speed release and take-up functions, characterized in that: The device includes a fixed frame (1), which has a pair of side plates (102). Two traction wheels (5) with parallel axes are rotatably connected between the two side plates (102). Two sets of drivers (7) are provided outside the side plates (102) to drive the two traction wheels (5) respectively. Each traction wheel (5) includes a transmission shaft (510) fixedly connected to the output end of the driver (7). The transmission shaft (510) is fitted with a wheel disc (520). The wheel disc (520) has a central shaft hole (521). 1) has a keyway (522) on its side wall. A pressure sensor (525) is provided on the opposite inner wall of the keyway (522). The side of the drive shaft (510) has a flat key (512) which is suitable for insertion into the keyway (522) and located between the two pressure sensors (525). The fixed frame (1) is connected to the movable frame (2) through the cylinder (4). Two pressure rollers (6) are rotatably connected in the movable frame (2), which cooperate with two traction rollers (5) to apply pressure to the cable passing around the outer side of the traction roller (5).

2. The tension machine with high and low speed winding and unwinding functions as described in claim 1, characterized in that: The outer side of the wheel (520) is provided with a force application groove (523), the cross section of the force application groove (523) is a concave arc shape, and the wheel (520) is fixedly attached with a friction pad (524) on the inner wall of the force application groove (523).

3. The tension machine with high and low speed release and take-up functions as described in claim 2, characterized in that: The main body of the drive shaft (510) is an optical shaft (511). The flat key (512) is adapted to be embedded in a groove on the outer side of the optical shaft (511). The two side plates (102) are provided with collinear first shaft holes (105) at opposite positions, which are adapted to cooperate with the two ends of the optical shaft (511) to form a rotating pair.

4. The tension machine with high and low speed winding and unwinding functions as described in claim 3, characterized in that: Each of the drivers (7) includes a servo motor (701) and a reducer (702) fixedly connected to the outer side of the side plate (102), the output end of the reducer (702) being fixedly connected to one end of the optical axis (511).

5. The tension machine with high and low speed release and take-up functions as described in claim 4, characterized in that: The two side plates (102) are fixedly connected to a base (101) on the side away from the movable frame (2), which is suitable for being fixedly connected to the carriage of the engineering vehicle by bolts.

6. The tension machine with high and low speed winding and unwinding functions as described in any one of claims 1 to 5, characterized in that: The movable frame (2) includes a pair of parallel guard plates (202), and the two pressure rollers (6) are movably connected between the two guard plates (202). The two guard plates (202) are fixedly connected by a bridge plate (205). Each pressure roller (6) has a pressure-distributing groove (601) on its outer side. The cross-section of the pressure-distributing groove (601) is a concave arc shape, and an elastic pad (602) is fixedly attached to the inner wall of the pressure-distributing groove (601).

7. The tension machine with high and low speed release and take-up functions as described in claim 6, characterized in that: The outer side of the side plate (102) is fixedly connected to the mounting platform (103) via the support frame (104), and the cylinder (4) is fixedly connected to the mounting platform (103); the two guard plates (202) are provided with corresponding second shaft holes (204), and the two ends of the pressure wheel (6) have coaxial end shafts (603), which are suitable for cooperating with the second shaft holes (204) to form a rotating pair.

8. The tension machine with high and low speed release and take-up functions as described in claim 7, characterized in that: The mounting platform (103) is also provided with a guide rail (3), the guide rail (3) includes a guide rod (301) fixedly connected to the mounting platform (103), the bottom of the side plate (102) has a support plate (201), the support plate (201) has a guide hole (203) and is suitable for cooperating with the guide rod (301) to form a sliding pair, the end of the guide rod (301) passes through the guide hole (203) and is fixedly connected with a limit ring (302); the movable end of the cylinder (4) is connected to the support plate (201).

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