Automatic release pin device and traction system

Abstract

The embodiment of the present invention discloses an automatic decoupling device and a traction system, which relates to the technical field of automatic guided transport vehicles. The device includes: a sliding assembly, a pin assembly, and a driving assembly; the pin assembly includes a pin channel and a traction pin; the driving assembly is connected to the pin assembly, the sliding assembly includes a linear slide rail and a sliding block fixedly arranged on the linear slide rail, the sliding block includes a horizontal plate and a vertical plate, and the bottom end of the traction pin abuts against the horizontal plate under the action of gravity; wherein the vertical plate is pushed by the hanging rod of the material car to make the horizontal plate move backward relative to the linear slide rail, and the traction pin falls instantly under the action of gravity to complete the decoupling action, thereby greatly improving the efficiency of the decoupling; and when the hanging rod of the material car performs the decoupling action, the hanging rod leaves the device, and the horizontal plate moves forward to the bottom of the traction pin to support the traction pin in the reset state, ensuring that the traction pin is in the reset state and improving the stability of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic guided vehicles, and in particular to an automatic detachable pin device and a traction system. Background Art

[0002] With the development of the forklift industry and the AGV (Automated Guided Vehicle) industry, AGV has gradually become an important core part of the intelligent logistics handling system and is widely used in factory workshops, warehouses, circulation centers and distribution centers. The traction AGV is one of the highly automated equipment that can automatically complete the point-to-point traction operation of materials. The detaching pin device is a very important component of the traction AGV. The detaching pin device realizes the AGV's detaching and de-attaching actions. However, the traditional detaching pin device requires manual detaching.

[0003] In the existing automatic pin-releasing device, when the material car's hanging rod enters the automatic pin-releasing device, the driving mechanism is controlled to execute the pinning action. The pinning process requires several seconds of reaction and execution time; and when the pin is released, it cannot be guaranteed that the traction pin is in the reset state, which affects the execution of the next pinning action, resulting in low efficiency and poor stability in the pin-releasing process. Summary of the Invention

[0004] The embodiments of the present invention provide an automatic detaching pin device and a traction system, aiming to solve the problems of low efficiency and poor stability of existing automatic detaching pin devices.

[0005] In the first aspect, an embodiment of the present invention proposes an automatic pin-releasing device, which is installed on a tractor to perform pin-releasing, pulling and pin-releasing actions on the hook rod of the material vehicle to complete the traction of the material vehicle, and the automatic pin-releasing device includes: a sliding assembly, a pin assembly and a driving assembly; the pin assembly includes a pin channel and a traction pin that can move up and down in the pin channel; when the driving assembly abuts against the traction pin, the driving assembly drives the traction pin to perform an upward lifting action; the sliding assembly includes a linear slide rail and a sliding blocking plate fixedly arranged on the linear slide rail and capable of sliding back and forth relative to the linear slide rail, and the sliding The blocking plate includes a horizontal plate and a vertical plate, and the bottom end of the traction pin is in contact with the horizontal plate under the action of gravity; wherein, when the hanging rod of the material car performs the hanging pin action, the hanging rod pushes the vertical plate to make the horizontal plate move backward relative to the linear slide rail, and the traction hanging pin breaks away from the support of the horizontal plate and falls to the hanging pin in place state, completing the hanging pin action; when the hanging rod of the material car performs the unhooking action, the driving component drives the traction hanging pin to lift up, and at the same time the hanging rod leaves the automatic unhooking pin device, and the horizontal plate moves forward to the bottom of the traction hanging pin to support the traction hanging pin in the hanging pin reset state to perform the next hanging pin action.

[0006] Its further technical solution is that it also includes a main support frame, which includes a support base plate, a first support side plate and a support top plate. The support base plate and the support top plate are fixed on the same side of the first support side plate, and the support top plate is located above the support base plate. The linear slide rail is fixed on the support base plate, and the drive assembly and the pin assembly are arranged on the support top plate.

[0007] A further technical solution is that a hook pin through hole is opened on the support top plate, and the hook pin channel is fixed at the hook pin through hole to provide a channel for the traction hook pin to move up and down; wherein, when the traction hook pin is in place, the bottom of the traction hook pin abuts against the support bottom plate; when the traction hook pin is in a reset state, the bottom of the traction hook pin abuts against the horizontal plate.

[0008] Its further technical solution is that the sliding assembly also includes a return spring, one end of the return spring is fixed to the support base plate, and the other end is fixedly connected to one end of the sliding baffle close to the first support side plate. When the traction pin is in place, the return spring is in a stretched state, and when the traction pin is reset, the return spring is in a retracted state.

[0009] Its further technical solution is that the driving assembly includes a motor, a motor bracket, a first synchronous wheel, a second synchronous wheel, a conveyor belt and a swing arm, the first synchronous wheel, the second synchronous wheel and the conveyor belt are arranged on the outside of the motor bracket, the motor and the swing arm are arranged on the inside of the motor bracket, the first synchronous wheel is fixedly connected to the rotating shaft of the motor, the second synchronous wheel is fixedly connected to the swing arm, the conveyor belt is sleeved on the outer periphery of the first synchronous wheel and the second synchronous wheel, and the motor drives the second synchronous wheel to rotate along with the first synchronous wheel to drive the swing arm to swing; a force plate is provided on the top of the traction pin; wherein, when the hanging rod of the material car performs the hanging pin action, the swing arm swings to disengage from the force plate, and the traction hanging pin abuts against the horizontal plate under the action of gravity; when the hanging rod of the material car performs the disengaging action, the motor drives the swing arm to swing upward to abut against the force plate and drive the force plate to be lifted to the highest position, so that the traction hanging pin is in a reset state.

[0010] Its further technical solution is that it also includes a first sensing component and a second sensing component; the first sensing component includes a hook pin in place sensing plate, a hook pin reset sensing plate, a hook pin in place sensor and a hook pin reset sensor, the hook pin in place sensor is fixed on the support base plate, the hook pin in place sensing plate is fixed on the side of the sliding blocking plate, when the traction hook pin is in place, the hook pin in place sensing plate triggers the hook pin in place sensor; the hook pin reset sensing plate is fixed on the swing arm and rotates with the swing arm, the hook pin reset sensor is fixed on the motor bracket and is located on one side of the swing arm side, when the traction hitch pin is reset, the hitch pin reset sensing plate triggers the hitch pin reset sensor; the second sensing component includes a pin-off sensing plate, a pin-off reset sensor and a pin-off position sensor, the pin-off sensing plate is fixed to the top of the traction hitch pin, the pin-off reset sensor and the pin-off position sensor are both fixed to the side of the traction hitch pin and the pin-off reset sensor is located above the pin-off position sensor, when the traction hitch pin is in position, the pin-off sensing plate triggers the pin-off reset sensor, and when the traction hitch pin is reset, the pin-off sensing plate triggers the pin-off position sensor.

[0011] A further technical solution is that a camera assembly and a fill light assembly are also provided on the support top plate, the fill light assembly is fixed above the camera assembly to provide fill light for the camera assembly, and the camera assembly is used to identify the material vehicle to be towed.

[0012] Its further technical solution is that it also includes a shell, one end of the shell is flippably connected to one side of the support top plate, and the other end of the shell is openably connected to the top end of the first support side plate; the main support frame also includes a second support side plate and a third support side plate, the second support side plate and the third support side plate are fixed to the support bottom plate, when the other end of the shell is covered with the top end of the first support side plate, the shell and the first support side plate, the second support side plate, the third support side plate and the support bottom plate form an accommodating cavity, and the accommodating cavity is used to accommodate components of the automatic detachable pin device.

[0013] A further technical solution is that a buffer through hole is provided on the support base plate at a position corresponding to the traction hitch pin, and the buffer through hole is used to buffer the impact force of the traction hitch pin on the support base plate when the traction hitch pin is in place.

[0014] In the second aspect, an embodiment of the present invention further proposes a traction system, which includes a tractor, a material cart and an automatic detachable pin device as described in any one of the above items, wherein the automatic detachable pin device is installed at the rear of the tractor to achieve a detachable or detachable action on the hook rod of the material cart to achieve traction of the material cart.

[0015] An embodiment of the present invention provides an automatic pin-releasing device and a pulling system. The automatic pin-releasing device uses the trolley's hook rod to push the vertical plate, causing the horizontal plate to move backward relative to the linear slide rail. The pulling pin instantly drops under gravity, completing the pulling action, thereby significantly improving the pulling efficiency. Furthermore, when the trolley's hook rod performs the pulling action, the hook rod leaves the automatic pin-releasing device, and the horizontal plate moves forward under the pulling pin, supporting it in a reset state, ensuring that the pulling pin is reset for the next pulling action, thereby improving the stability of the automatic pin-releasing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the exploded structure of the automatic detachable pin device provided in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the assembly structure of the automatic detachable pin device provided in an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the exploded structure of the sliding assembly of the automatic pin release device provided in an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the assembly of a sliding assembly of an automatic pin release device provided in an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the exploded structure of a hook pin assembly of an automatic hook pin release device provided in an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of the assembly of a hook pin assembly of an automatic hook pin release device provided in an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the exploded structure of a drive assembly of an automatic detachable pin device provided in an embodiment of the present invention;

[0024] Figure 8 A schematic diagram of the assembly of a drive assembly of an automatic decoupling pin device provided in an embodiment of the present invention;

[0025] Figure 9 A schematic diagram of an exploded portion of the automatic detachable pin device provided by an embodiment of the present invention;

[0026] Figure 10 A schematic structural diagram of a traction system provided in an embodiment of the present invention.

[0027] Reference numerals

[0028] Automatic hook-off device 100, hook assembly 1, hook channel 11, traction hook 12, force plate 13, lifting handle 14, sliding assembly 2, linear slide 21, sliding block 22, horizontal plate 221, vertical plate 222, return spring 23, main support frame 3, support bottom plate 31, buffer through hole 311, first support side plate 32, support top plate 33, hook through hole 331, second support side plate 34, third support side plate 35, drive assembly 4, motor 41 , motor bracket 42, first synchronous wheel 43, second synchronous wheel 44, conveyor belt 45, swing arm 46, pin in place sensing plate 51, hanging pin reset sensing plate 52, hanging pin in place sensor 53, hanging pin reset sensor 54, out-of-pin sensing plate 61, out-of-pin reset sensor 62, out-of-pin in place sensor 63, camera assembly 71, fill light assembly 72, shell 8, camera through hole 81, fill light through hole 82, guide 9, tractor 200, material cart 300, hanging rod 301. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0031] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in the specification and appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0032] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0033] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0034] See Figures 1 to 9 , which shows an embodiment of the automatic pin-off device 100 provided by an embodiment of the present invention. The device is installed on a tractor 200 to perform the pin-off, pulling and pin-off actions on the hook rod 301 of the material cart 300 to complete the traction of the material cart 300. The automatic pin-off device 100 includes: a sliding component 2, a pin assembly 1 and a driving component 4; the pin assembly 1 includes a pin channel 11 and a traction pin 12 that can move up and down in the pin channel 11; when the driving component 4 abuts against the traction pin 12, the driving component 4 drives the traction pin 12 to perform an upward lifting action; the sliding component 2 includes a linear slide 21 and a sliding block 22 fixedly arranged on the linear slide 21 and capable of sliding back and forth relative to the linear slide 21, and the sliding block 22 includes a horizontal plate 221 and a vertical plate 22 2. The bottom end of the traction pin 12 is in contact with the horizontal plate 221 under the action of gravity; wherein, when the hanging rod 301 of the material cart 300 performs the hanging pin action, the hanging rod 301 pushes the vertical plate 222 to make the horizontal plate 221 move backward relative to the linear slide rail 21, and the traction pin 12 breaks away from the support of the horizontal plate 221 and falls to the hanging pin in place state, completing the hanging pin action; when the hanging rod 301 of the material cart 300 performs the unhooking action, the driving component 4 drives the traction pin 12 to lift up, and at the same time, the hanging rod 301 leaves the automatic unhooking pin device 100, and the horizontal plate 221 moves forward to the bottom of the traction pin 12 to support the traction pin 12 in the hanging pin reset state to perform the next hanging pin action. Specifically, in one embodiment, the traction pin 12 falls down instantly under the action of gravity to complete the pinning action, thereby greatly improving the efficiency of the pinning; and when the hanging rod 301 of the material cart 300 performs the pin-off action, the hanging rod 301 leaves the automatic pin-off device 100, and the horizontal plate 221 moves forward to the bottom of the traction pin 12 to support the traction pin 12 in a pin reset state, ensuring that the traction pin 12 is in a reset state to perform the next pinning action, thereby improving the stability of the automatic pin-off device 100.

[0035] Furthermore, the automatic pin-releasing device 100 further includes a main support frame 3, which includes a support base plate 31, a first support side plate 32, and a support top plate 33. The support base plate 31 and the support top plate 33 are fixed to the same side of the first support side plate 32, and the support top plate 33 is located above the support base plate 31. The linear guide rail 21 is fixed to the support base plate 31, and the drive assembly 4 and the pin assembly 1 are arranged on the support top plate 33. Figure 9 Specifically, in one embodiment, the main support frame 3 provides support for the linear slide rail 21 and the pin assembly 1, and other components of the automatic pin detaching device 100 are also arranged relative to the main support frame 3 to realize the function of the automatic pin detaching device 100.

[0036] Furthermore, a hook pin through hole 331 is formed on the support top plate 33, and the hook pin channel 11 is fixed to the hook pin through hole 331 to provide a channel for the traction hook pin 12 to move up and down; wherein, when the traction hook pin 12 is in the in-position state, the bottom of the traction hook pin 12 abuts against the support bottom plate 31; when the traction hook pin 12 is in the reset state, the bottom of the traction hook pin 12 abuts against the horizontal plate 221. Figure 1 、 Figure 5 as well as Figure 6 In one embodiment, the hitch pin channel 11 provides a channel for the up-and-down movement of the hitch pin 12, ensuring that the hitch pin 12 can smoothly engage and disengage. Furthermore, the hitch pin channel 11 acts as a stop when the hitch pin 12 is in position, ensuring that the hitch pin 12 stops falling when the top of the hitch pin 12 abuts the top of the hitch pin channel 11. Specifically, in this embodiment, the hitch pin channel 11 is a linear bearing. Other structures that provide a channel for up-and-down movement and support for the hitch pin 12 may also be used. The specific structure of the hitch pin channel 11 is not specifically limited herein.

[0037] Furthermore, the sliding assembly 2 further includes a return spring 23, one end of which is fixed to the support base plate 31, and the other end of which is fixedly connected to the end of the sliding blocking plate 22 close to the first support side plate 32. When the traction hook 12 is in place, the return spring 23 is in a stretched state, and when the traction hook 12 is reset, the return spring 23 is in a retracted state. Figure 3 and Figure 4In one embodiment, when the traction hitch pin 12 is in place (i.e., the hook rod 301 is locked within the traction hitch pin 12), the return spring 23 is in a stretched state. This allows the elastic potential energy accumulated in the return spring 23 to drive the sliding block 22 forward and reset when the hitch pin is released. The horizontal plate 221 supports the traction hitch pin 12 in the reset state, allowing for the next hitch operation. This ensures that the traction hitch pin 12 is reset in a timely manner, improving the stability of the automatic hitch pin release device 100. Specifically, in this embodiment, two return springs 23 are provided on either side of the sliding block 22 to ensure balanced force on the sliding block 22 when in place and when reset.

[0038] Furthermore, the driving assembly 4 includes a motor 41, a motor bracket 42, a first synchronous wheel 43, a second synchronous wheel 44, a conveyor belt 45 and a swing arm 46. The first synchronous wheel 43, the second synchronous wheel 44 and the conveyor belt 45 are arranged on the outside of the motor bracket 42, the motor 41 and the swing arm 46 are arranged on the inside of the motor bracket 42, the first synchronous wheel 43 is fixedly connected to the rotating shaft of the motor 41, the second synchronous wheel 44 is fixedly connected to the swing arm 46, the conveyor belt 45 is sleeved on the outer periphery of the first synchronous wheel 43 and the second synchronous wheel 44, and the motor 41 drives the The second synchronous wheel 44 rotates along with the first synchronous wheel 43 to drive the swing arm 46 to swing; a force plate 13 is provided on the top of the traction hitch pin 12; wherein, when the hanging rod 301 of the material cart 300 performs the pinning action, the swing arm 46 swings to disengage from the force plate 13, and the traction hitch pin 12 abuts against the horizontal plate 221 under the action of gravity; when the hanging rod 301 of the material cart 300 performs the pinning action, the motor 41 drives the swing arm 46 to swing upward until it abuts against the force plate 13 and drives the force plate 13 to lift to the highest position, so that the traction hitch pin 12 is in the reset state. Figure 7 and Figure 8 Specifically, in one embodiment, when performing the unpinning action, the motor 41 drives the swing arm 46 to swing upward until it abuts against the force plate 13 and drives the force plate 13 to lift to the highest position, so as to lift the traction pin 12 to the reset state and complete the unpinning action. Other forms of drive components 4 that can lift the traction pin 12 can also be set according to actual needs. The specific settings of the drive component 4 are not limited here.

[0039] It should be noted that, in this embodiment, when the hanging rod 301 of the material cart 300 performs the disengaging action, the motor 41 drives the swing arm 46 to swing to the highest position to lift the force plate 13 and drive the traction hanging pin 12 to lift up. When the horizontal plate 221 supports the traction hanging pin 12 in the hanging pin reset state, the motor 41 drives the swing arm 46 to swing to disengage from the force plate 13 so that there is no force on the traction hanging pin 12, thereby ensuring the smooth execution of the next hanging pin action.

[0040] Furthermore, the automatic hook pin detaching device 100 also includes a first sensing component and a second sensing component; the first sensing component includes a hook pin in place sensing plate 51, a hook pin reset sensing plate 52, a hook pin in place sensor 53 and a hook pin reset sensor 54, the hook pin in place sensor 53 is fixed on the supporting base plate 31, the hook pin in place sensing plate 51 is fixed on the side of the sliding blocking plate 22, and when the traction hook pin 12 is in place, the hook pin in place sensing plate 51 triggers the hook pin in place sensor 53; the hook pin reset sensing plate 52 is fixed on the swing arm 46 and rotates with the swing arm 46, the hook pin reset sensor 54 is fixed on the motor bracket 42 and is located at the side of the swing arm 46 On one side, when the traction hitch pin 12 is reset, the hitch pin reset sensing plate 52 triggers the hitch pin reset sensor 54; the second sensing component includes a pin-out sensing plate 61, a pin-out reset sensor 62, and a pin-out in-place sensor 63. The pin-out sensing plate 61 is fixed to the top of the traction hitch pin 12, and the pin-out reset sensor 62 and the pin-out in-place sensor 63 are both fixed to the side of the traction hitch pin 12, and the pin-out reset sensor 62 is located above the pin-out in-place sensor 63. When the traction hitch pin 12 is in place, the pin-out sensing plate 61 triggers the pin-out reset sensor 62. When the traction hitch pin 12 is reset, the pin-out sensing plate 61 triggers the pin-out in-place sensor 63. Please refer to Figure 4 、 Figure 8 as well as Figure 9 In this embodiment, the sensors used are infrared sensors. Specifically, when the towing hitch pin 12 is in place, the hitch pin in place sensing plate 51 moves backward along with the sliding blocking plate 22 to block the hitch pin in place sensor 53, thereby triggering the hitch pin in place sensor 53. When the swing arm 46 rotates to its highest position, the hitch pin reset sensing plate 52 rotates to a position that blocks the hitch pin reset sensor 54, thereby triggering the hitch pin reset sensor 54. Similarly, depending on the position of the hitch release sensing plate 61, either the hitch release in place sensor 63 or the hitch release reset sensor 62 is triggered. By providing a first sensing component and a second sensing component to detect the in-place and reset states of the towing hitch pin 12, the stability of the automatic hitch release device 100 is further improved.

[0041] Furthermore, a camera assembly 71 and a fill light assembly 72 are also provided on the support top plate 33. The fill light assembly 72 is fixed above the camera assembly 71 to fill light for the camera assembly 71. The camera assembly 71 is used to identify the towing material vehicle 300. Figure 9Specifically, in one embodiment, through the cooperation of the camera assembly 71 and the fill light assembly 72, the tractor 200 equipped with the automatic pin-releasing device 100 can more quickly and accurately identify the towed material cart 300. In this embodiment, a corresponding QR code is affixed to the corresponding position of the material cart 300, and the camera assembly 71 determines whether the material cart 300 is a towed material cart 300 by identifying the QR code on the material cart 300.

[0042] Furthermore, the automatic detaching pin device 100 further includes a shell 8, one end of which is reversibly connected to one side of the support top plate 33, and the other end of which is openably connected to the top end of the first support side plate 32; the main support frame 3 further includes a second support side plate 34 and a third support side plate 35, and the second support side plate 34 and the third support side plate 35 are fixed to the support bottom plate 31. When the other end of the shell 8 covers the top end of the first support side plate 32, the shell 8, the first support side plate 32, the second support side plate 34, the third support side plate 35 and the support bottom plate 31 form a receiving chamber (not shown in the figure), which is used to accommodate the components of the automatic detaching pin device 100. Please refer to Figure 9 Specifically, in one embodiment, the components of the automatic detaching pin device 100 are accommodated in the accommodating cavity to ensure the normal operation of each component without being affected by the outside, and the outer shell 8 and the top end of the first supporting side plate 32 can be opened and closed to facilitate the maintenance personnel to perform later maintenance on the automatic detaching pin device 100.

[0043] It should be noted that a camera through hole 81 is provided on the housing 8 at a position relative to the camera assembly 71 and a fill light through hole 82 is provided at a position relative to the fill light assembly 72 to enable identification of the material cart 300 .

[0044] Furthermore, a buffer hole 311 is provided on the support base plate 31 at a position corresponding to the traction hitch pin 12. The buffer hole 311 is used to buffer the impact force of the traction hitch pin 12 on the support base plate 31 when the traction hitch pin 12 is in place. Figure 4 Specifically, in one embodiment, when the towing hitch pin 12 is instantly in place under the action of gravity, it generates a huge impact force, which directly impacts the support base 31, causing deformation of the support base 31 or affecting the functions of other components. Specifically, a rubber pad can be placed in the buffer hole 311 to absorb the impact force when the towing hitch pin 12 falls.

[0045] Furthermore, the automatic hook-off device 100 further includes a guide member 9, which is fixedly connected to the support base 31 and is used to guide the hook rod 301 of the material vehicle 300. Specifically, in this embodiment, see Figure 1 and Figure 2 After the tractor 200 identifies the material vehicle 300 to be towed, it accurately completes the pinning action under the guidance of the guide member 9.

[0046] Furthermore, a lifting handle 14 is provided on the top of the traction hitch pin 12 to facilitate the removal and installation of the traction hitch pin 12 during subsequent maintenance, thereby providing convenience for maintenance.

[0047] See Figure 10 , which illustrates a traction system provided by an embodiment of the present invention, comprising a tractor 200, a material cart 300, and the automatic pin-releasing device 100 described in any of the aforementioned embodiments. The automatic pin-releasing device 100 is mounted on the rear of the tractor 200 to engage or disengage the hooking rod 301 of the material cart 300 to tow the material cart 300. Specifically, in one embodiment, the efficiency and stability of the traction system are improved by the highly efficient and stable automatic pin-releasing device 100.

[0048] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0049] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, to the extent such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to encompass such changes and modifications.

[0050] The above description is a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. An automatic pin-releasing device is installed on a tractor to perform the pin-releasing, pulling and pin-releasing actions on the hook rod of the material vehicle to complete the traction of the material vehicle, characterized in that: The automatic pin-releasing device comprises: a sliding assembly, a pin assembly and a driving assembly; The hitch pin assembly includes a hitch pin channel and a traction hitch pin that can move up and down in the hitch pin channel, and a force-bearing plate is provided on the top of the traction hitch pin; The driving assembly includes a motor, a motor bracket, a first synchronous wheel, a second synchronous wheel, a conveyor belt and a swing arm, wherein the first synchronous wheel, the second synchronous wheel and the conveyor belt are arranged on the outside of the motor bracket, the motor and the swing arm are arranged on the inside of the motor bracket, the first synchronous wheel is fixedly connected to the rotating shaft of the motor, the second synchronous wheel is fixedly connected to the swing arm, the conveyor belt is sleeved on the outer circumference of the first synchronous wheel and the second synchronous wheel, and the motor drives the second synchronous wheel to rotate along with the first synchronous wheel to drive the swing arm to swing; When the driving assembly abuts against the traction hitch pin, the driving assembly drives the traction hitch pin to perform an upward lifting action; The sliding assembly includes a linear slide rail and a sliding blocking plate fixedly mounted on the linear slide rail and capable of sliding back and forth relative to the linear slide rail. The sliding blocking plate includes a horizontal plate and a vertical plate. The bottom end of the traction pin abuts against the horizontal plate under the action of gravity. When the hanging rod of the material car performs the hanging pin action, the hanging rod pushes the vertical plate to make the horizontal plate move backward relative to the linear slide rail, and the traction hanging pin breaks away from the support of the horizontal plate and falls to the hanging pin in place state, completing the hanging pin action; when the hanging rod of the material car performs the unhooking action, the driving component drives the traction hanging pin to lift up, and at the same time the hanging rod leaves the automatic unhooking pin device, and the horizontal plate moves forward to the bottom of the traction hanging pin to support the traction hanging pin in the hanging pin reset state to perform the next hanging pin action; When the hanging rod of the material cart performs the hanging pin action, the swing arm swings to disengage from the force plate, and the traction hanging pin abuts against the horizontal plate under the action of gravity; when the hanging rod of the material cart performs the disengaging pin action, the motor drives the swing arm to swing upward to abut against the force plate and drives the force plate to be lifted to the highest position, so that the traction hanging pin is in a reset state.

2. The automatic detachable pin device according to claim 1, characterized in that: It also includes a main support frame, which includes a support base plate, a first support side plate and a support top plate. The support base plate and the support top plate are fixed on the same side of the first support side plate, and the support top plate is located above the support base plate. The linear slide rail is fixed on the support base plate, and the drive assembly and the pin assembly are arranged on the support top plate.

3. The automatic detachable pin device according to claim 2, characterized in that: A hook pin through hole is provided on the support top plate, and the hook pin channel is fixed at the hook pin through hole to provide a channel for the traction hook pin to move up and down; wherein, when the traction hook pin is in place, the bottom of the traction hook pin abuts against the support bottom plate; when the traction hook pin is in a reset state, the bottom of the traction hook pin abuts against the horizontal plate.

4. The automatic detachable pin device according to claim 3, characterized in that: The sliding assembly also includes a return spring, one end of which is fixed to the support base plate, and the other end of which is fixedly connected to one end of the sliding baffle close to the first support side plate. When the traction pin is in place, the return spring is in a stretched state, and when the traction pin is reset, the return spring is in a retracted state.

5. The automatic detachable pin device according to claim 4, characterized in that: Also includes a first sensing component and a second sensing component; The first sensing component includes a hook pin in place sensing plate, a hook pin reset sensing plate, a hook pin in place sensor, and a hook pin reset sensor. The hook pin in place sensor is fixed to the support base plate, and the hook pin in place sensing plate is fixed to the side of the sliding blocking plate. When the towing hook pin is in place, the hook pin in place sensing plate triggers the hook pin in place sensor. The hook pin reset sensing plate is fixed to the swing arm and rotates with the swing arm. The hook pin reset sensor is fixed to the motor bracket and is located on one side of the swing arm. When the towing hook pin is reset, the hook pin reset sensing plate triggers the hook pin reset sensor. The second sensing component includes an off-pin sensing plate, an off-pin reset sensor and an off-pin in-place sensor. The off-pin sensing plate is fixed on the top of the traction pin. The off-pin reset sensor and the off-pin in-place sensor are both fixed on the side of the traction pin, and the off-pin reset sensor is located above the off-pin in-place sensor. When the traction pin is in place, the off-pin sensing plate triggers the off-pin reset sensor. When the traction pin is reset, the off-pin sensing plate triggers the off-pin in-place sensor.

6. The automatic detachable pin device according to claim 5, characterized in that: The supporting top plate is also provided with a camera assembly and a fill light assembly. The fill light assembly is fixed above the camera assembly to provide fill light for the camera assembly. The camera assembly is used to identify the material vehicle to be towed.

7. The automatic detachable pin device according to claim 6, characterized in that: It also includes a shell, one end of which is reversibly connected to one side of the support top plate, and the other end of which is openably connected to the top end of the first support side plate; The main support frame also includes a second support side plate and a third support side plate, and the second support side plate and the third support side plate are fixed to the support base plate. When the other end of the shell covers the top end of the first support side plate, the shell and the first support side plate, the second support side plate, the third support side plate and the support base plate form an accommodating cavity, and the accommodating cavity is used to accommodate components of the automatic detaching pin device.

8. The automatic detachable pin device according to claim 7, characterized in that: A buffer through hole is provided on the support base plate at a position corresponding to the traction hitch pin, and the buffer through hole is used to buffer the impact force of the traction hitch pin on the support base plate when the traction hitch pin is in place.

9. A traction system, characterized in that: It includes a tractor, a material cart and an automatic pin-releasing device as described in any one of claims 1 to 8. The automatic pin-releasing device is installed at the rear of the tractor to achieve the pinning or pin-releasing action of the hanging rod of the material cart to achieve traction of the material cart.

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