Traction bolt device for tractor and tractor

Abstract

Disclosed in the present application are a traction bolt device for a tractor and a tractor. The traction bolt device comprises a connecting seat configured to be connected to a tractor, a first drive mechanism provided on the connecting seat and a traction assembly driven by the first drive mechanism to ascend and descend in a set direction. The traction assembly comprises a second drive mechanism, a traction bolt shaft provided with a shaft hole and a telescopic mechanism movably arranged inside the shaft hole. The telescopic mechanism is configured to stretch, driven by the second drive mechanism, out of the shaft hole in the set direction and push a pulled device, and can generate contracting deformation during pushing while transmitting pressure to the tractor in a direction opposite to the set direction by means of the connecting seat. Further disclosed is a tractor provided with the traction bolt device. On the basis of pre-obtained weights of pulled devices, the present application can control the amount of contracting deformation of the telescopic mechanism, so as to avoid excessively pushing pulled devices while transmitting pressure to tractors.

Description

Traction pin device for tractor and tractor

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 12, 2024, with application number 202420489172.9 and invention name “A traction pin device for a tractor and a tractor”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of traction equipment, and in particular to a traction pin device for a tractor and a tractor. Background Art

[0003] With the rapid development of smart warehousing, more and more cargo transfers will be completed using traction equipment. Traction equipment generally includes a tractor and a towed device (generally a towed vehicle or frame with wheels) that are used in conjunction with each other. The towed device can be used to carry cargo, and the tractor can drive the towed device to move after successfully docking with the towed device through the traction pin. The force exerted by the tractor on the towed device is generally in the traction direction, so the friction between the tractor and the ground needs to be large enough to provide the required traction force. In related technologies, the friction between the tractor and the ground is generally increased by increasing the deadweight of the tractor, but this will increase the manufacturing cost, operating cost, etc. of the tractor.

[0004] Current related technologies also offer solutions that can provide sufficient traction without utilizing the weight of the tractor. These solutions employ a drive mechanism to continuously elevate a traction pin, allowing the pin to push against the towed device. The pin then transmits the reaction force of the towed device to the tractor, thereby transferring the weight of the towed device to the tractor and increasing the friction between the tractor and the ground. However, this solution poses the risk of over-elevation during the continuous jacking of the traction pin by the drive mechanism, which could lead to the risk of the towed device being lifted and separated from the tractor, or even causing the towed device to overturn.

[0005] Utility Model Content

[0006] The present application aims to solve one of the technical problems in the related art to a certain extent. To this end, the present application provides a towing pin device for a tractor and a tractor.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: a traction pin device for a tractor, the traction pin device including a connecting seat configured to be connected to the tractor, a first driving mechanism arranged on the connecting seat, and a traction assembly driven by the first driving mechanism to rise and fall along a set direction, the traction assembly including a second driving mechanism, a traction pin shaft formed with an axial hole, and a telescopic mechanism movably arranged in the axial hole; the telescopic mechanism is configured to be able to extend out of the axial hole along the set direction and push the tractor under the driving action of the second driving mechanism, and the telescopic mechanism is also configured to be able to generate contraction deformation during the pushing and transmit pressure to the tractor through the connecting seat in a direction opposite to the set direction.

[0008] The present invention has the following beneficial effects: by providing a second drive mechanism and a telescopic mechanism, while utilizing the traction pin to achieve traction docking, the second drive mechanism drives the telescopic mechanism to operate and push against the towed device, thereby transferring the weight of the towed device to the tractor and increasing the friction between the tractor and the ground. Simultaneously, during this pushing process, the telescopic mechanism can contract. The operator, using the pre-determined weight of the towed device, can determine a reasonable amount of compression for the telescopic mechanism. When the telescopic mechanism is compressed to the pre-determined amount, pushing against the towed device is stopped. This ensures that the weight of the towed device is transferred to the tractor while also preventing excessive pushing against the towed device.

[0009] Optionally, the telescopic mechanism includes an embedded pin shaft and a telescopic elastic member, the top end of the telescopic elastic member is connected to the bottom end of the embedded pin shaft, and the bottom end of the telescopic elastic member is connected to the second driving mechanism.

[0010] Optionally, the traction pin device further includes a mounting seat, the traction assembly is arranged on the mounting seat, and the first driving mechanism is connected to the mounting seat and is configured to drive the mounting seat to rise and fall along a set direction.

[0011] Optionally, the mounting seat includes a main seat and a support arranged on the main seat, the support is located below the main seat, the traction pin is arranged on the main seat, and the second driving mechanism is arranged on the support.

[0012] Optionally, the second driving mechanism includes a second motor and a threaded screw driven by the second motor to rise and fall along a set direction, the main seat is provided with a through hole aligned with the axial hole, the axial hole has a threaded section, the top end of the threaded screw passes through the through hole and extends into the axial hole and is fixed to the bottom end of the telescopic mechanism, and the threaded screw is threadedly connected to the threaded section.

[0013] Optionally, the lower end of the traction pin is fixed to the main seat, the connecting seat is provided with a through-hole adapted to the traction pin, and the upper end of the traction pin extends out of the through-hole.

[0014] Optionally, the main seat is provided with a threaded hole, and the first driving mechanism includes a first motor and a transmission screw threadedly connected to the threaded hole, and the first motor drives the mounting seat to rise and fall along a set direction by driving the transmission screw to rotate.

[0015] Optionally, the traction pin device also includes a mounting plate, the transmission screw passes through the main seat, and the top end of the transmission screw is rotatably set on the connecting seat through a bearing, and the bottom end of the transmission screw is rotatably set on the mounting plate through a bearing.

[0016] Optionally, two transmission screws are provided, and the first motor drives the two transmission screws to move synchronously through a belt transmission mechanism.

[0017] In addition, the present application further provides a tractor, comprising a vehicle body, the tractor further comprising a tow pin device as described in any of the above technical solutions, the tow pin device being fixedly mounted to the vehicle body via the connecting seat. The reasoning process for the beneficial effects of the tractor provided in this application and the aforementioned tow pin device is similar and will not be repeated here.

[0018] These features and advantages of this application will be disclosed in detail in the following detailed description and accompanying drawings. The best embodiments or means of this application will be fully illustrated in conjunction with the accompanying drawings, but this does not limit the technical solutions of this application. Furthermore, although there may be multiple features, elements, and components in each of the following text and accompanying drawings, different symbols or numbers may be used for convenience, but all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0020] The present application will be further described below with reference to the accompanying drawings:

[0021] FIG1 is a schematic structural diagram of a traction pin device for a tractor provided in an embodiment of the present application;

[0022] FIG2 is a partial cross-sectional view of the traction pin device in FIG1 ;

[0023] FIG3 is an enlarged schematic diagram of part A in FIG2 ;

[0024] FIG4 is a second partial cross-sectional view of the traction pin device in FIG1 ;

[0025] FIG5 is an enlarged schematic diagram of part B in FIG4 ;

[0026] FIG6 is a schematic structural diagram of a tractor equipped with the traction pin device provided in this embodiment;

[0027] FIG7 is a schematic diagram of the application of the tractor in FIG6 for towing a towed device;

[0028] FIG8 is a partial cross-sectional view of the tractor in FIG6 used to tow a towed device;

[0029] FIG9 is an enlarged schematic diagram of portion C in FIG8 .

[0030] Among them, 1. Connecting seat, 10. Bearing, 11. Mounting plate, 2. First driving mechanism, 20. First motor, 21. Transmission screw, 22. First transmission belt, 23. Driving wheel, 24. Synchronous wheel, 3. Second driving mechanism, 30. Second motor, 31. Threaded screw, 32. Second transmission belt, 4. Traction pin, 5. Embedded pin, 6. Telescopic elastic member, 7. Mounting seat, 70. Main seat, 71. Support, 72. Guide rod, 8. Vehicle body, 80. Traction wheel, 9. Towed device, 90. Cargo. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings and examples. It should be understood that the described examples are merely a portion of the present invention, not all of it. All other examples derived by persons of ordinary skill in the art based on the examples in the present invention are intended to fall within the scope of protection of the present invention.

[0032] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described in the embodiments are intended to be used to explain the present application and are not to be construed as limiting the present application.

[0033] References in this specification to "one embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment disclosed herein. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0034] This embodiment provides a towing pin device for a tractor, as shown in Figures 1, 2, and 3. The towing pin device includes a connecting base 1, a first drive mechanism 2, and a towing assembly. The connecting base 1 is configured to connect to the tractor, and the first drive mechanism 2 is disposed on the connecting base 1 and configured to drive the towing assembly to move up and down in a set direction. The towing assembly in this embodiment includes a second drive mechanism 3, a towing pin 4, and a telescopic mechanism. The towing pin 4 has a hollow axial hole formed along its axial direction, and the telescopic mechanism is a movable component that is movably disposed within the axial hole. The telescopic mechanism in this embodiment is configured to extend from the axial hole in a set direction under the drive of the second drive mechanism 3 and push against the towed device. The telescopic mechanism is also configured to contract during this pushing action and transmit pressure to the tractor through the connecting base 1 in a direction opposite to the set direction. The set direction in this embodiment is aligned with the axial direction of the towing pin 4 and is upward. In general use, the set direction is a vertically upward direction.

[0035] This traction pin device can be applied to a tractor. By providing a second drive mechanism 3 and a telescopic mechanism, while achieving traction docking using the traction pin shaft 4, the second drive mechanism 3 can also be used to drive the telescopic mechanism to operate and push against the towed device, thereby transferring the weight of the towed device to the tractor and increasing the friction between the tractor and the ground. Simultaneously, the telescopic mechanism can contract during this pushing process. The operator can determine a reasonable amount of compression for the telescopic mechanism based on the previously known weight of the towed device, and stop pushing against the towed device when the telescopic mechanism is compressed to the predetermined amount of contraction. This ensures that the weight of the towed device is transferred to the tractor while also avoiding excessive pushing against the towed device. Furthermore, because the telescopic mechanism can contract within a certain range, the traction pin device is suitable for towing devices of varying weights, and the appropriate amount of contraction can be adjusted based on the weight of the towed device.

[0036] The telescopic mechanism in this embodiment includes an embedded pin 5 and a telescopic elastic member 6, the top of the telescopic elastic member 6 is connected to the bottom end of the embedded pin 5, and the bottom end of the telescopic elastic member 6 is connected to the second drive mechanism 3. This design can utilize the rigid embedded pin 5 to push the traction device, and utilize the telescopic elastic member 6 to achieve the telescopic mechanism, so that contraction deformation can be generated when pushing. Specifically in this embodiment, a spring is selected as the elastic telescopic member. In addition, in an optional embodiment, a structure such as a metal shrapnel can also be used as the elastic telescopic member, as long as it can produce an elastomer that can be compressed in a set direction and meet the compression requirements. In addition, the spring as the telescopic elastic member 6 in this embodiment can be fixedly connected to the embedded pin 5 by welding or clamping. In other words, the two can be directly welded together, or an annular groove can be set at the bottom end of the embedded pin 5, and the top of the spring can be clamped into the above-mentioned annular groove.

[0037] The second drive mechanism 3 in this embodiment includes a second motor 30 and a threaded screw 31 driven by the second motor 30 to rise and fall in a set direction. The top end of the threaded screw 31 extends into the shaft hole and is fixedly connected to the bottom end of the telescopic elastic member 6. It is easy to understand that the top end of the threaded screw can also be fixedly connected to the spring serving as the telescopic elastic member by welding or clamping.

[0038] In addition, the traction pin device provided in this embodiment further includes a mounting seat 7, the traction assembly is disposed on the mounting seat 7, and the first drive mechanism 2 is connected to the mounting seat 7 and configured to drive the mounting seat 7 to rise and fall in a set direction. In other words, the traction assembly is entirely disposed on the mounting seat 7, so that as long as the mounting seat 7 is driven up and down by the first drive mechanism 2, the traction assembly located on the mounting seat 7 can be driven up and down.

[0039] Furthermore, the mounting base 7 in this embodiment includes a main base 70 and a support 71, the support 71 is arranged on the main base 70 and is located below the main base 70, the traction pin 4 is arranged on the main base 70, and the second drive mechanism 3 is arranged on the support 71. This arrangement allows the threaded screw 31 in the second drive mechanism 3 to extend into the shaft hole along a set direction (as shown in FIG1 , that is, from bottom to top), which facilitates the assembly of the threaded screw 31. In addition, a through hole aligned with the shaft hole is provided on the main base 70, the top end of the threaded screw 31 passes through the through hole and extends into the shaft hole and is fixed to the bottom end of the telescopic mechanism, and at the same time, the shaft hole of the traction pin 4 has a threaded section, and the threaded screw 31 is threadedly connected to the above-mentioned threaded section. It is easy to understand that the above-mentioned threaded section is located at one end of the shaft hole close to the main base 70. The threaded transmission connection between the threaded rod 31 and the threaded segment in the axial hole can achieve axial stability of the threaded rod 31 relative to the main base 70. Axial stability means that the threaded rod 31 will not fall relative to the main base 70 in the absence of external force. Accordingly, the second motor 30 and the support 71 can maintain axial stability relative to the main base 70 under the action of the threaded rod 31. When the second motor 30 drives the threaded rod 31 to rotate, the threaded transmission causes the threaded rod 31 to achieve a lifting motion relative to the main base 70. During this process, the threaded rod 31 also drives the support 71 and the second motor 30 to move synchronously. Furthermore, in this embodiment, a guide rod 72 is provided between the main base 70 and the support 71. One end of the guide rod 72 is fixedly connected to the support 71, and the other end of the guide rod 72 is inserted into a guide hole provided in the main base 70 and slidably disposed within the guide hole. The provision of the guide rod 72 prevents the support 71 and the second motor 30 from rotating relative to the main base 70. In an optional embodiment, one end of the guide rod may be fixed to the main seat, and the other end of the guide rod may be slidably disposed on the support.

[0040] Specifically in this embodiment, the support 71 is in the shape of a long plate, and the second motor 30 is fixedly arranged at one end of the support 71. The output end of the second motor 30 is connected to the second transmission belt 32. The second transmission belt 32 can drive the threaded screw 31 to rotate, and the threaded transmission connection between the threaded screw 31 and the threaded section in the shaft hole can drive the second drive mechanism as a whole and the support 71 to rise and fall.

[0041] In other optional embodiments, an electric push rod or the like may be used as the second driving mechanism to drive the telescopic mechanism to move up and down along a set direction.

[0042] In addition, the lower end of the traction pin 4 in this embodiment is fixed to the main seat 70, and the connecting seat 1 is provided with a through-hole adapted for the traction pin 4, through which the upper end of the traction pin 4 extends. The through-hole provides an axial limit for the traction pin 4, preventing the traction pin 4 from shaking when it is raised or lowered in the set direction.

[0043] As shown in FIG1 , in this embodiment, a threaded hole is further provided on the main seat 70, and the first drive mechanism 2 includes a first motor 20 and a transmission screw 21 threadedly connected to the threaded hole. The first motor 20 drives the transmission screw 21 to rotate and drives the mounting seat 7 to rise and fall along a set direction. That is, in this embodiment, the transmission screw 21 is designed to be able to rotate around its axis and cannot be moved up and down along its axial direction. In this way, through the threaded transmission connection, the rotational movement of the transmission screw 21 can be converted into the lifting movement of the mounting seat 7 along the set direction. Specifically, in combination with FIG4 and FIG5 , the traction pin device also includes a mounting plate 11, the transmission screw 21 passes through the main seat 70, and the top end of the transmission screw 21 is rotatably provided on the connecting seat 1 through a bearing 10, and the bottom end of the transmission screw 21 is rotatably provided on the mounting plate 11 through a bearing 10.

[0044] To enhance the stability of the mounting base 7 as it moves along a predetermined direction, this embodiment employs two drive screws 21, which are driven synchronously by a first motor 20 via a belt drive mechanism. Specifically, as shown in Figure 1 , a driving pulley 23 is provided at the output end of the first motor 20, a synchronous pulley 24 is also provided on the connecting base 1, and a transmission pulley is provided at the top of the drive screws 21. A first transmission belt 22 is tensioned between the driving pulley 23, the synchronous pulley 24, and the two transmission pulleys. This arrangement allows the first motor 20 to drive the two drive screws 21 to rotate synchronously, thereby driving the mounting base 7 along a predetermined direction.

[0045] The traction pin device provided in this embodiment can be applied to a tractor. As shown in FIG6 , a tractor includes a vehicle body 8 and the traction pin device provided in this embodiment. The traction pin device is fixedly mounted on the vehicle body 8 via a connecting seat 1 .

[0046] With reference to Figures 7, 8, and 9, the following describes the use of the tractor: Traction wheels 80 are provided below the tractor body 8, allowing the tractor to travel along a path. A towed device 9 includes a frame, also provided with wheels below the frame, and cargo 90 is mounted on the frame. The tractor can be driven to move below the towed device 9. The first drive mechanism 2 then drives the mounting base 7 in a predetermined direction. The traction assembly on the mounting base 7 follows the movement of the mounting base 7 until the traction pin 4 is inserted into a mating hole on the towed device 9 that matches the traction pin 4. The second drive mechanism 3 then drives the telescopic mechanism in a predetermined direction. After moving a certain distance, the telescopic mechanism contacts the bottom of the towed device. Continued movement of the telescopic mechanism pushes against the towed device, causing the telescopic mechanism to contract and deform. Before towing the towed device, the operator can calculate the maximum contraction deformation of the telescopic mechanism based on the known weight of the towed device 9 (including the cargo 90 stored thereon). (Theoretically, the towed device will not be excessively pushed before the telescopic mechanism reaches the calculated maximum value.) Of course, in actual operation, considering that the towing vehicle itself has a certain weight, the telescopic mechanism can be stopped when the contraction deformation of the telescopic mechanism approaches the calculated maximum value.

[0047] This allows the weight of the towed device to be transferred to the tractor while also preventing excessive pushing on the towed device. Consequently, the tractor itself does not need to be designed to be extremely heavy, nor does its overall size, reducing procurement and maintenance costs.

[0048] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Those skilled in the art should understand that the present application includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present application are included within the scope of the claims.

Claims

1. A towing pin device for a towing vehicle, wherein: The traction pin device comprises a connecting seat (1) configured to be connected to a tractor, a first driving mechanism (2) arranged on the connecting seat (1), and a traction assembly driven by the first driving mechanism (2) to rise and fall along a set direction, the traction assembly comprising a second driving mechanism (3), a traction pin shaft (4) formed with an axial hole, and a telescopic mechanism movably arranged in the axial hole; The telescopic mechanism is configured to be able to extend out of the shaft hole in a set direction and push the towed device under the driving action of the second driving mechanism (3), and the telescopic mechanism is also configured to be able to generate contraction deformation when pushing and simultaneously transmit pressure to the towing vehicle in a direction opposite to the set direction through the connecting seat (1).

2. The traction pin device according to claim 1, wherein: The telescopic mechanism comprises an embedded pin shaft (5) and a telescopic elastic member (6), the top end of the telescopic elastic member (6) is connected to the bottom end of the embedded pin shaft (5), and the bottom end of the telescopic elastic member (6) is connected to the second driving mechanism (3).

3. The traction pin device according to claim 1 or 2, wherein: The traction pin device further comprises a mounting seat (7), the traction assembly is arranged on the mounting seat (7), and the first driving mechanism (2) is connected to the mounting seat (7) and is configured to drive the mounting seat (7) to rise and fall along a set direction.

4. The traction pin device according to claim 3, wherein: The mounting seat (7) comprises a main seat (70) and a support (71) arranged on the main seat (70), wherein the support (71) is located below the main seat (70), the traction pin shaft (4) is arranged on the main seat (70), and the second driving mechanism (3) is arranged on the support (71).

5. The traction pin device according to claim 4, wherein: The second driving mechanism (3) includes a second motor (30) and a threaded screw (31) driven by the second motor (30) to rise and fall along a set direction. The main seat (70) is provided with a through hole aligned with the shaft hole. The shaft hole has a threaded section. The top end of the threaded screw (31) passes through the through hole and extends into the shaft hole to be fixed to the bottom end of the telescopic mechanism. The threaded screw (31) is threadedly connected to the threaded section.

6. The traction pin device according to claim 4, wherein: The lower end of the traction pin shaft (4) is fixed to the main seat (70), and the connecting seat (1) is provided with a through hole adapted to the traction pin shaft (4), and the upper end of the traction pin shaft (4) extends out of the through hole.

7. The traction pin device according to claim 4, wherein: The main seat (70) is provided with a threaded hole, and the first driving mechanism (2) includes a first motor (20) and a transmission screw (21) threadedly connected to the threaded hole, and the first motor (20) drives the transmission screw (21) to rotate to drive the mounting seat (7) to rise and fall along a set direction.

8. The traction pin device according to claim 7, wherein: The traction pin device also includes a mounting plate (11), the transmission screw (21) passes through the main seat (70), and the top end of the transmission screw (21) is rotatably arranged on the connecting seat (1) through a bearing (10), and the bottom end of the transmission screw (21) is rotatably arranged on the mounting plate (11) through a bearing (10).

9. The traction pin device according to claim 7, wherein: Two transmission screws (21) are provided, and the first motor (20) drives the two transmission screws (21) to move synchronously via a belt transmission mechanism.

10. A tractor, comprising a vehicle body (8), wherein: The tractor further comprises a traction pin device according to any one of claims 1 to 9, wherein the traction pin device is fixedly mounted on the vehicle body (8) via the connecting seat (1).

Images