Rear door locking mechanism of dumper and dumper

Abstract

The utility model discloses a rear door locking mechanism of a dumper and the dumper, and relates to the technical field of engineering vehicles, and the rear door locking mechanism comprises a first fixed seat, a second fixed seat and a third fixed seat, the lock hook is rotationally connected with the first fixed seat; the second fixing seat is rotationally connected to the rear end of the frame, a telescopic piece is arranged on the second fixing seat, the telescopic end of the telescopic piece is sequentially connected with a tension sensor and a lock chain, and the other end of the lock chain is rotationally connected with the lock hook; the telescopic piece and the tension sensor are both in signal connection with the control unit. According to the rear door locking mechanism of the dumper, the technical problems that when an existing rear door is closed, errors exist in manual locking force adjustment, and the workload of operators is increased through manual adjustment are solved, the locking force on the rear door is automatically adjusted when the rear door is closed, and the situation that a lock hook is damaged or fails due to the fact that the locking force is adjusted too large is avoided; and the technical effect that effective sealing of the rear door cannot be guaranteed due to insufficient locking force is avoided, and then the workload of operators is reduced is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering vehicles, and particularly relates to a rear door locking mechanism and a dump truck of a dump truck. Background Art

[0002] As an engineering transport vehicle, a dump truck is widely used in multiple industries such as construction and mining. It is mainly used to transport various bulk materials, such as sand, gravel, coal, etc., and can quickly unload the goods at the destination.

[0003] Traditionally, the rear door of a dump truck mostly adopts a chain-type locking mechanism. This structure is relatively simple and has a low cost. However, under complex and changeable working conditions and harsh usage environments, its performance is often unsatisfactory. Specifically, the chain that bears heavy loads and is opened and closed frequently for a long time is prone to looseness due to wear, resulting in a gradual weakening of the locking force, unable to ensure the tight closure of the rear door during transportation, which may lead to safety problems such as cargo leakage and spilling, and at the same time reduces the transportation efficiency.

[0004] In order to improve this situation, in the prior art, such as the rear door chain-type locking mechanism of a dump truck disclosed in Chinese Patent CN201520039229.6, the available length of the locking rod is adjusted by introducing an adjusting nut, thereby achieving the adjustment of the locking force to a certain extent. However, the above adjustment method relies on manual operation and has the drawback that it is difficult to precisely control the magnitude of the locking force. On the one hand, if the locking force is adjusted too large, it may exceed the bearing range designed by the mechanism, resulting in component damage or failure; on the other hand, if the locking force is insufficient, the effective sealing of the rear door cannot be ensured, affecting the transportation quality. In addition, manual adjustment increases the workload of the operator.

[0005] Therefore, there is an urgent need for a reliable rear door locking mechanism for a dump truck to overcome the deficiencies of the prior art. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a rear door locking mechanism and a dump truck of a dump truck, which solve the technical problems that there are errors in the manual adjustment of the locking force when the existing rear door is closed, and the manual adjustment increases the workload of the operator.

[0007] To achieve the above purpose, the utility model provides a rear door locking mechanism for a dump truck. The dump truck includes a vehicle frame, a box body hinged to the vehicle frame, and a rear door hinged to the upper side of the rear end of the box body. The rear door locking mechanism includes:

[0008] A first fixed seat fixedly arranged at the rear end of the box body;

[0009] A locking hook rotatably connected to the first fixed seat;

[0010] The second fixed seat is rotatably connected to the rear end of the vehicle frame. An expansion member is provided on the second fixed seat. The telescopic end of the expansion member is sequentially connected to a tension sensor and a chain. The other end of the chain is rotatably connected to the locking hook.

[0011] A control unit, and both the expansion member and the tension sensor are in signal connection with the control unit.

[0012] Preferably, the expansion member is a hydraulic rod.

[0013] Preferably, the locking hook is rotatably connected to the first fixed seat through a first pin shaft.

[0014] Preferably, one side of the locking hook facing the compartment body is rotatably connected to the chain through a second pin shaft.

[0015] Preferably, the second fixed seat is rotatably connected to the vehicle frame through a third pin shaft.

[0016] Preferably, it further includes a position sensor in signal connection with the control unit. The position sensor is used to detect the opening or closing state of the rear door, and the control unit adjusts the telescopic amount of the expansion member according to the rear door state.

[0017] Preferably, the control unit further includes a remote monitoring system, and the remote monitoring system can receive and display the readings of the tension sensor, the telescopic state of the expansion member, and the opening or closing state of the rear door.

[0018] A dump truck includes the rear door locking mechanism of the above dump truck.

[0019] Compared with the above background technology, the rear door locking mechanism of a dump truck provided by the present utility model: When the rear door is closed, the locking hook fits against the outer side of the rear door. At this time, the expansion member starts to extend or contract, drives the locking hook to rotate through the chain, and realizes locking. The tension sensor monitors the tension borne by the chain in real time and transmits the data to the control unit. The control unit judges whether the locking force is appropriate according to the received tension signal. If the locking force is too large or too small, the control unit automatically adjusts the telescopic amount of the expansion member to ensure that the locking force is within the preset range. In summary, the rear door locking mechanism of a dump truck provided by the present application can automatically adjust the locking force on the rear door when the rear door is closed compared with the prior art, avoiding excessive adjustment of the locking force, resulting in damage or failure of the locking hook; and avoiding insufficient locking force, which cannot ensure the effective sealing of the rear door and affect the transportation quality, thereby reducing the workload of the operator. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0021] Figure 1 The structural schematic diagram of the rear door locking mechanism of a dump truck provided by an embodiment of the present invention.

[0022] Wherein:

[0023] 1 - First fixed seat, 2 - Lock hook, 3 - Second fixed seat, 4 - Telescopic member, 5 - Tensile sensor, 6 - Chain. Specific embodiments

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] To enable those skilled in the art of this technology to better understand the solution of the present invention, the following will further elaborate on the present invention in detail with reference to the drawings and specific embodiments.

[0026] See Figure 1 , a rear door locking mechanism of a dump truck provided by the present application. The dump truck includes a vehicle frame, a compartment hinged to the vehicle frame, and a rear door hinged to the upper side of the rear end of the compartment. The rear door locking mechanism includes a first fixed seat 1 fixedly provided at the rear end of the compartment; a lock hook 2 rotatably connected to the first fixed seat 1; a second fixed seat 3 rotatably connected to the rear end of the vehicle frame. A telescopic member 4 is provided on the second fixed seat 3. The telescopic end of the telescopic member 4 is sequentially connected to a tensile sensor 5 and a chain 6. The other end of the chain 6 is rotatably connected to the lock hook 2; a control unit, and both the telescopic member 4 and the tensile sensor 5 are in signal connection with the control unit.

[0027] That is to say, the first fixed seat 1 is fixed at the rear end of the compartment, thereby ensuring that the lock hook 2 can rotate stably during the locking and unlocking processes without shaking or offsetting.

[0028] The second fixed seat 3 is rotatably connected to the rear end of the vehicle frame, enabling the telescopic member 4 fixedly provided on the second fixed seat 3 to flexibly adjust its position and direction.

[0029] One end of the telescopic member 4 is fixed to the second fixed seat 3, and the other end is connected to the locking hook 2 through a tension sensor 5 and a chain 6. When the rear door is closed, the locking hook fits against the outer side of the rear door. At this time, the telescopic movement of the telescopic member can drive the rotation of the chain 6 and the locking hook 2, thereby adjusting the locking force applied by the locking hook 2 to the rear door.

[0030] The tension sensor 5 is installed between the telescopic end of the telescopic member 4 and the chain 6, and is used to monitor the tension borne by the chain 6 in real time. When the telescopic member 4 works, the tension sensor 5 converts the monitoring signal into an electrical signal and transmits it to the control unit.

[0031] The control unit can receive the tension signal transmitted by the tension sensor 5, and judge whether the locking force is appropriate according to the preset threshold range. If the tension exceeds the preset range, the control unit will automatically adjust the telescopic amount of the telescopic member 4 so that the tension returns to the preset range.

[0032] The working principle of the rear door locking mechanism of a dump truck provided in this application is as follows: After the rear door is closed, the locking hook 2 fits against the outer side of the rear door. At this time, the telescopic member 4 starts to extend or shorten, drives the locking hook 2 to rotate through the chain 6 to achieve locking. The tension sensor 5 monitors the tension borne by the chain 6 in real time and transmits the data to the control unit. The control unit judges whether the locking force is appropriate according to the received tension signal. If the locking force is too large or too small, the control unit automatically adjusts the telescopic amount of the telescopic member 4 to ensure that the locking force is within the preset range. In summary, compared with the prior art, the rear door locking mechanism of a dump truck provided in this application realizes automatic adjustment of the locking force on the rear door when the rear door is closed, avoiding excessive adjustment of the locking force, resulting in damage or failure of the locking hook; and insufficient locking force, which cannot ensure the effective sealing of the rear door, affects the transportation quality, and further reduces the workload of the operator. In addition, for how the rear door locking mechanism of a dump truck provided in this application realizes the closing and opening of the rear door, it is common knowledge, and specifically, reference can be made to a self-locking assembly of a mining dump truck disclosed in the prior art 200920216307.X, which will not be elaborated here.

[0033] Based on the above embodiment, the telescopic member 4 is an electric push rod or a hydraulic cylinder. Specifically, the telescopic member 4 is preferably a hydraulic rod.

[0034] That is to say, compared with the electric push rod, the hydraulic rod can provide greater thrust and pulling force, can realize precise control of the telescopic amount of the hydraulic rod, and further the locking force can be finely adjusted as needed and maintained within the preset threshold range, thereby extending the service life of the locking hook and the chain and ensuring the sealing performance of the rear door.

[0035] Based on the above embodiment, a manual pump or a backup power source is provided on the hydraulic rod to ensure that it can still be operated manually or through the backup power source in case of power failure or control system failure, improving the reliability.

[0036] Based on the above embodiments, the locking hook 2 is rotatably connected to the first fixed seat 1 through the first pin shaft; one side of the locking hook 2 facing the compartment body is rotatably connected to the chain 6 through the second pin shaft; the second fixed seat 3 is rotatably connected to the vehicle frame through the third pin shaft.

[0037] That is to say, the locking hook 2 is rotatably connected to the first fixed seat 1 through the first pin shaft. Further, the locking hook 2 rotates around the first pin shaft during the locking and unlocking processes, so as to adapt to the position changes when the rear door is closed and opened.

[0038] One side of the locking hook 2 facing the compartment body is rotatably connected to the chain 6 through the second pin shaft, allowing the locking hook 2 to rotate around the second pin shaft when the chain 6 drives the locking hook 2 to perform the locking or unlocking action, so as to adapt to the change of the locking force.

[0039] The second fixed seat 3 is rotatably connected to the vehicle frame through the third pin shaft, enabling the second fixed seat 3 and the telescopic member (such as a hydraulic rod) fixed thereon to rotate or swing within a certain range relative to the vehicle frame, so as to adapt to the position adjustment requirements of the rear door locking mechanism under different working conditions.

[0040] The third pin shaft is usually installed at a predetermined position on the vehicle frame and passes through the corresponding hole on the second fixed seat 3. The second fixed seat 3 is firmly fixed to the vehicle frame through a locking device (such as a locking nut, a circlip, etc.), while allowing it to rotate or swing around the third pin shaft.

[0041] Based on the above embodiments, it further includes a position sensor that establishes a signal connection with the control unit. The position sensor is used to detect the opening or closing state of the rear door, and the control unit adjusts the telescopic amount of the telescopic member 4 according to the rear door state.

[0042] Specifically, the position sensor can detect in real time whether the rear door is in the open state or the closed state, and transmit this information to the control unit in the form of an electrical signal. The signal connection usually adopts a wireless method.

[0043] After receiving the signal transmitted by the position sensor, the control unit will immediately perform parsing and processing to determine the current state of the rear door (open or closed). According to this judgment result, the control unit will correspondingly adjust the telescopic amount of the telescopic member 4 to ensure that the locking force is appropriate and the rear door can be tightly closed.

[0044] When the position sensor detects that the rear door is in the closed state, the control unit will adjust the telescopic amount of the telescopic member 4 according to the preset locking force threshold and the real-time pulling force value feedback by the pulling force sensor 5, so that the locking force reaches the preset range. If the pulling force is too large or too small, the control unit will automatically adjust the telescopic amount to maintain the stability of the locking force.

[0045] The above-mentioned position sensor can be a proximity switch sensor, which is installed on the box body and works by sensing the approach of the rear door. When the rear door enters the sensing range of the sensor, it will change the magnetic field or electric field inside the sensor, thus triggering the switch to actuate.

[0046] The control unit further includes a remote monitoring system, which can receive and display the readings of the tension sensor 5, the telescopic state of the telescopic member 4, and the open or closed state of the rear door.

[0047] That is to say, the remote monitoring system can receive in real time the tension readings transmitted by the tension sensor 5, the telescopic state of the telescopic member 4, and the open or closed state of the rear door, which helps to detect and handle potential safety hazards in a timely manner and ensure the safety of the vehicle and the goods.

[0048] This application also provides a dump truck, including the rear door locking mechanism of the dump truck as described above.

[0049] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0050] In this article, specific examples are used to elaborate on the principle and implementation mode of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A rear door locking mechanism for a dump truck, the dump truck comprising a frame, a box body hinged to the frame, and a rear door hinged to the upper side of the rear end of the box body, characterized in that, The rear door locking mechanism includes: A first fixed seat (1), fixedly arranged at the rear end of the box body; A locking hook (2), rotatably connected to the first fixed seat (1); A second fixed seat (3), rotatably connected to the rear end of the vehicle frame. An expansion member (4) is provided on the second fixed seat (3). The expansion end of the expansion member (4) is sequentially connected to a tension sensor (5) and a chain (6). The other end of the chain (6) is rotatably connected to the locking hook (2); A control unit. Both the expansion member (4) and the tension sensor (5) are in signal connection with the control unit.

2. The rear door locking mechanism of the dump truck according to claim 1, characterized in that, The expansion member (4) is a hydraulic rod.

3. The rear door locking mechanism of the dump truck according to claim 1, characterized in that, The locking hook (2) is rotatably connected to the first fixed seat (1) through a first pin shaft.

4. The rear door locking mechanism of the dump truck according to claim 1, characterized in that, One side of the locking hook (2) facing the box body is rotatably connected to the chain (6) through a second pin shaft.

5. The rear door locking mechanism of the dump truck according to claim 1, characterized in that, The second fixed seat (3) is rotatably connected to the vehicle frame through a third pin shaft.

6. The rear door locking mechanism of the dump truck according to any one of claims 1-5, characterized in that, It further includes a position sensor in signal connection with the control unit. The position sensor is used to detect the opening or closing state of the rear door. The control unit adjusts the expansion amount of the expansion member (4) according to the rear door state.

7. The rear door locking mechanism of the dump truck according to claim 6, characterized in that, The control unit further includes a remote monitoring system. The remote monitoring system can receive and display the reading of the tension sensor (5), the expansion state of the expansion member (4), and the opening or closing state of the rear door.

8. A dump truck, characterized in that, It includes the rear door locking mechanism of the dump truck according to any one of claims 1 to 7.

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