Automatic lifting traction pin

Abstract

The utility model relates to an automatic lifting traction pin which comprises a support and further comprises a motor, a transmission assembly, a traction part and a first connecting piece, the motor is arranged on the surface of the support, and the first connecting piece is matched with the motor and one part of the transmission assembly. The other part of the transmission assembly is matched with the traction part, and automatic lifting of the traction pin is achieved through driving of the motor. By designing the traction pin, the overall structure size is reduced, wiring harness wiring is greatly simplified, devices are reduced, design functions are met, meanwhile, the traction pin is small, exquisite, flexible and convenient to use, and the stroke can be accurately achieved through motor control. A control unit is integrated in the motor and is integrated with the motor, so that communication, data exchange and control with the outside can be realized. In addition, the motor has the functions of over-current protection, power-off memory, closed-loop control and the like, the motor protection function is added by adding closed-loop control, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of traction devices, in particular to an automatic lifting traction pin. Background Art

[0002] The automatic traction pin is an efficient, safe and reliable traction vehicle connection device, which is widely used in logistics, transportation and other fields. Its main function is to facilitate the connection or disassembly of mechanical equipment, vehicles or tools, and to achieve relative fixation of different parts. Most of the automatic traction pin controls on the market currently use DC brushed motors, which are low-cost and require an external reducer to increase torque. In addition, the open-loop operation of the motor requires the addition of upper and lower switch relays to detect the position, which results in a large number of overall mechanical components and diverse wiring. In particular, the lack of closed-loop protection of the motor can easily lead to damage to the motor, causing unnecessary losses. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide an automatic lifting traction pin to solve one or more problems in the prior art.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] An automatic lifting traction pin comprises a bracket, the traction pin also comprising a motor, a transmission assembly, a traction part and a first connecting piece, the motor is arranged on the surface of the bracket, the first connecting piece is respectively matched with the motor and a part of the transmission assembly, and the other part of the transmission assembly is matched with the traction part, and the automatic lifting of the traction pin is realized by the drive of the motor.

[0006] Furthermore, the motor includes a driving shaft, and the first connecting member is provided with a first protrusion on a side close to the motor, and a first recess is provided on a surface of the first protrusion, and the first recess is matched with the driving shaft.

[0007] Furthermore, the transmission assembly includes a first transmission member, and one end of the first transmission member is fixedly connected to the first connecting member.

[0008] Furthermore, the transmission assembly also includes a second transmission member, the traction pin includes a second connecting member, and one end of the second transmission member is rotatably connected to the other end of the first transmission member via the second connecting member.

[0009] Furthermore, the traction pin also includes a third connecting member, the traction portion is provided with a first groove, and the other end of the second transmission member is movably connected to the traction portion via the third connecting member and is disposed in the first groove.

[0010] Furthermore, the traction pin includes a bearing portion, and the bearing portion is fixedly connected to the bracket.

[0011] Furthermore, the traction pin also includes a limiting sleeve, the limiting sleeve is arranged in the bearing part, and the traction part is movably arranged in the limiting sleeve.

[0012] A closed-loop control method, applied to the above-mentioned automatic lifting traction pin, comprises the following steps:

[0013] The controller sets the target angle and transmits it to the position loop regulator, speed loop regulator and current loop regulator in sequence through pulse instructions;

[0014] The motor synchronously feeds back the current angle, position, speed and current to the position loop regulator, speed loop regulator and current loop regulator in sequence through the encoder signal;

[0015] The position loop regulator, speed loop regulator and current loop regulator respectively perform deviation analysis between the actual value and the target value;

[0016] The controller controls and accurately adjusts the motor through pulse width modulation (PWN) digital output according to the results of deviation analysis.

[0017] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0018] (I) By designing the traction pin described in this embodiment, the overall structural size is reduced, the wiring harness is greatly simplified, and the number of components is reduced. While meeting the design function, it is small and flexible. The power is transmitted to the traction part through the transmission component to control the traction part to run, and the stroke can be accurately achieved through motor control.

[0019] (ii) The motor has a compact structure, with an integrated control unit and motor, which can communicate, exchange data and control with the outside. In addition, the motor has functions such as overcurrent protection, power-off memory, and closed-loop control. By adding closed-loop control, the motor protection function is increased, and the product life is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural schematic diagram of an automatic lifting traction pin in an embodiment of the utility model is shown.

[0021] Figure 2 A schematic structural diagram of the assembly of a motor and a bracket for automatically lifting and lowering a traction pin according to an embodiment of the utility model is shown.

[0022] Figure 3 A structural schematic diagram of a bracket for automatically lifting and lowering a traction pin according to an embodiment of the utility model is shown.

[0023] Figure 4A schematic structural diagram of a motor for automatically lifting and lowering a traction pin according to an embodiment of the utility model is shown.

[0024] Figure 5 A schematic structural diagram of a first transmission member of an automatic lifting traction pin in an embodiment of the utility model is shown.

[0025] Figure 6 A schematic structural diagram of a second transmission member of an automatic lifting traction pin in an embodiment of the utility model is shown.

[0026] Figure 7 A structural schematic diagram of a second connecting member of an automatic lifting traction pin in an embodiment of the utility model is shown.

[0027] Figure 8 A structural schematic diagram of a third connecting member of an automatic lifting traction pin in an embodiment of the utility model is shown.

[0028] Fig. 9 A structural schematic diagram of a traction part of an automatic lifting traction pin according to an embodiment of the utility model is shown.

[0029] Fig.10 A structural schematic diagram of a bearing portion of an automatically lifting traction pin according to an embodiment of the utility model is shown.

[0030] Fig.11 A schematic structural diagram of a limit rod for an automatic lifting traction pin according to an embodiment of the utility model is shown.

[0031] Fig.12 A structural schematic diagram of a first connecting member of an automatic lifting traction pin in an embodiment of the utility model is shown.

[0032] Fig.13 A schematic structural diagram of a limit sleeve of an automatic lifting traction pin according to an embodiment of the utility model is shown.

[0033] Fig.14 A schematic structural diagram of the assembly of a first connecting member and a first transmission member of an automatic lifting traction pin according to an embodiment of the utility model is shown.

[0034] Fig.15 The utility model shows a schematic structural diagram of the assembly of a bearing part, a limiting sleeve and a traction part of an automatic lifting traction pin in an embodiment of the utility model.

[0035] Fig.16 A schematic flow chart of a closed-loop control method for automatically lifting and lowering a traction pin according to an embodiment of the utility model is shown.

[0036] Markings in the accompanying drawings: 1, bracket; 101, first hole; 102, second hole; 103, third hole; 104, fourth hole; 2, motor; 201, drive shaft; 202, first tooth opening; 203, fifth hole; 3, transmission assembly; 301, first transmission member; 3011, sixth hole; 3012, seventh hole; 302, second transmission member; 3021, eighth hole; 3022, ninth hole; 4, second connecting member; 401, tenth hole; 5, third connecting member Connecting piece; 501, eleventh hole; 6, traction part; 601, first groove; 602, twelfth hole; 603, third recessed part; 7, bearing part; 700, second protrusion; 701, second recessed part; 702, thirteenth hole; 703, fourteenth hole; 8, limiting rod; 9, first connecting piece; 900, first protrusion; 901, first recessed part; 902, second tooth mouth; 903, sixteenth hole; 10, limiting sleeve; 1001, fifteenth hole. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model clearer, the following is a further detailed description of an automatic lifting traction pin proposed by the utility model in combination with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and all use non-precise proportions. The terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, rather than indicating or implying that the automatic lifting traction pin or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model, but only to facilitate and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings.

[0038] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions for the implementation of the utility model, so they have no substantive technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model.

[0039] The following describes a specific structure of an automatic lifting traction pin:

[0040] See also Figures 1 to 4The automatic lifting traction pin of this embodiment includes a bracket 1, wherein a first hole 101 and a third hole 103 are formed on a side surface of a bottom of the bracket 1, and a second hole 102 and a fourth hole 104 are formed on a top of the bracket 1.

[0041] Furthermore, the traction pin also includes a motor 2, and the motor 2 has a fifth hole 203 on the side near the bracket 1, and the fifth hole 203 is matched with the third hole 103, and the motor 2 is fixed to the outer side of the bottom of the bracket 1 by screws. Preferably, the motor 2 contains an integrated control unit, which has functions such as overcurrent protection, power-off memory, and closed-loop control.

[0042] Please continue reading Figure 1 , Figure 2 , Figure 5 , Fig.12 and Fig.14 The motor 2 includes a driving shaft 201, and a first tooth opening 202 is arranged along the outer circle of the driving shaft 201 at one end close to the bracket 1. The traction pin includes a first connecting member 9, and a sixteenth hole 903 is arranged on the surface of the first connecting member 9. The first connecting member 9 is provided with a first protrusion 900 on a side close to the motor 2, and a first recessed portion 901 is arranged on the surface of the first protrusion 900, and a second tooth opening 902 is arranged along the inner side of the first recessed portion 901. The driving shaft 201 extends into the first recessed portion 901 so that the first tooth opening 202 is engaged with the second tooth opening 902.

[0043] Furthermore, the traction pin also includes a transmission assembly 3, which includes a first transmission member 301 and a second transmission member 302. The first transmission member 301 has a sixth hole 3011 and a seventh hole 3012 on its surface, and the sixth hole 3011 cooperates with the sixteenth hole 903. One end of the first transmission member 301 is connected to the first connecting member 9 by screws.

[0044] Furthermore, the first connecting member 9 moves under the drive of the driving shaft 201 , and then the first transmission member 301 is driven.

[0045] Please continue reading Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.11 The traction pin also includes a second connecting member 4 and a third connecting member 5. The second transmission member 302 has an eighth hole 3021 and a ninth hole 3022. The ninth hole 3022 cooperates with the seventh hole 3012. The second connecting member 4 is inserted from one end so that the first transmission member 301 and the second transmission member 302 are rotatably connected to each other.

[0046] Further, the traction pin further comprises a traction part 6 and a limit rod 8, wherein the traction part 6 is provided with a third recessed part 603 at one end close to the motor 2, and the third recessed part 603 forms a cavity in the traction part 6. The traction part 6 is further provided with a first slot 601 at one end close to the motor 2, and preferably, two first slots 601 are provided, the first slots 601 are arranged opposite to each other, and twelfth holes 602 are provided on both sides where no slots are provided, and the twelfth holes 602 are preferably within the length range of the first slot 601, and the twelfth holes 602 are matched with the eighth holes 3021, and the third connecting member 5 is inserted from one end so that the second transmission member 302 is rotatably connected to the traction part 6.

[0047] Furthermore, the second connecting member 4 and the third connecting member 5 are respectively provided with a tenth hole 401 and an eleventh hole 501 at the insertion end, and the other ends of the second connecting member 4 and the third connecting member 5 are respectively larger than the seventh hole 3012 and the ninth hole 3022 as well as the eighth hole 3021 and the twelfth hole 602, so as to play a limiting role. One end of the limiting rod 8 is formed into a snap-fit ​​shape and is respectively matched with the tenth hole 401 and the eleventh hole 501, so as to limit the first transmission member 301 and the second transmission member 302 and the second transmission member 302 and the traction part 6 from separation.

[0048] Furthermore, the second transmission member 302 is driven by the movement of the first transmission member 301 , and the second transmission member 302 moves in the first groove 601 to push the traction part 6 to move.

[0049] Please continue reading Figure 1 , Figure 3 , Fig.10 , Fig.13 and Fig.15 The traction pin includes a bearing portion 7, and a second protrusion 700 is provided at the end of the bearing portion 7 away from the motor 2. A second recessed portion 701 is provided on the surface of the second protrusion 700. A fourteenth hole 703 is provided in the second recessed portion 701. The fourteenth hole 703 cooperates with the above-mentioned fourth hole 104, and the bearing portion 7 is fixed to the bracket 1 by screws.

[0050] Furthermore, the bearing portion 7 further defines a thirteenth hole 702 , and the traction pin further includes a limiting sleeve 10 , and the limiting sleeve 10 is disposed in the thirteenth hole 702 .

[0051] Furthermore, the limiting sleeve 10 defines a fifteenth hole 1001 , and the traction portion 6 is movably disposed in the fifteenth hole 1001 . Under the action of the transmission component 3 , the traction portion 6 can perform a linear motion in the limiting sleeve 10 along the limiting sleeve 10 .

[0052] The specific working process of an automatic lifting traction pin described in an embodiment of the utility model is described below:

[0053] The motor 2 is started, and the drive shaft 201 rotates under the action of the motor 2. Due to the connection between the first connecting member 9 and the first transmission member 301, the first transmission member 301 moves with the operation of the first connecting member 9 under the operation of the drive shaft 201, and then the second transmission member 302 moves with the movement of the first transmission member 301. Finally, the traction part 6 makes a linear motion in the limit sleeve 10 with the movement of the second transmission member 302.

[0054] In addition, this embodiment also provides a closed-loop control method, which is applied to the above-mentioned automatic lifting traction pin. Please continue to refer to Fig.16 , including the following steps: the controller sets the target angle and transmits it to the position loop regulator, the speed loop regulator and the current loop regulator in sequence through pulse instructions, the motor 2 synchronously feeds back the current angle, speed and current to the position loop regulator, the speed loop regulator and the current loop regulator in sequence through encoder signals, the position loop regulator, the speed loop regulator and the current loop regulator respectively perform deviation analysis on the actual value and the target value, and the controller controls and accurately adjusts the motor 2 through the pulse width modulation PWN digital output according to the result of the deviation analysis.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An automatic lifting traction pin, comprising a bracket, characterized in that: The traction pin also includes a motor, a transmission assembly, a traction part and a first connecting piece. The motor is arranged on the surface of the bracket. The first connecting piece is respectively matched with the motor and a part of the transmission assembly. The other part of the transmission assembly is matched with the traction part. The traction pin is automatically lifted and lowered by the drive of the motor.

2. An automatic lifting traction pin according to claim 1, characterized in that: The motor comprises a driving shaft. The first connecting member is provided with a first protrusion on a side close to the motor. A first recess is provided on the surface of the first protrusion. The first recess is matched with the driving shaft.

3. An automatic lifting traction pin according to claim 2, characterized in that: The transmission assembly includes a first transmission member, one end of which is fixedly connected to the first connecting member.

4. An automatic lifting traction pin according to claim 3, characterized in that: The transmission assembly further includes a second transmission member, the traction pin includes a second connecting member, and one end of the second transmission member is rotatably connected to the other end of the first transmission member via the second connecting member.

5. An automatic lifting traction pin according to claim 4, characterized in that: The traction pin further includes a third connecting member, the traction portion is provided with a first groove, and the other end of the second transmission member is movably connected to the traction portion via the third connecting member and is disposed in the first groove.

6. The automatic lifting traction pin according to claim 1, characterized in that: The traction pin includes a bearing portion, and the bearing portion is fixedly connected to the bracket.

7. An automatic lifting traction pin according to claim 6, characterized in that: The traction pin further includes a limiting sleeve, which is arranged in the bearing portion, and the traction portion is movably arranged in the limiting sleeve.

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