WO2011047547A1

WO2011047547A1 - Auxiliary closing device for bottom door of truck

Info

Publication number: WO2011047547A1
Application number: PCT/CN2010/072920
Authority: WO
Inventors: 赵建; 刘海鹏; 贾志学
Original assignee: 齐齐哈尔轨道交通装备有限责任公司; 齐齐哈尔齐车集团方圆工模具有限责任公司
Priority date: 2009-10-23
Filing date: 2010-05-19
Publication date: 2011-04-28
Also published as: CN101699009A

Abstract

An auxiliary closing device for bottom door has a flexible member arranged between a chassis (1) and a bottom door (2) so as to provide a restoring force for the bottom door along the closing direction. The flexible member includes a twisted bar (3) and a transmission rod (4). One end of the twisted bar (3) is hinged with the first end of the transmission rod (4), and the other end is mounted on a proper position of the bottom door (2). The second end of the transmission rod (4) is hinged with the chassis (1). The twisted bar (3) comprises a first bar section (31), a second bar section (32) and a twisting section (33). There is a proper angle between the axis of the first bar section (31) and the axis of the second bar section (32).

Description

Truck bottom door auxiliary closing device

This application claims priority to Chinese Patent Application No. 200910180997.2, entitled "A Type of Truck and Its Bottom Door Auxiliary Closing Device", filed on October 23, 2009, the entire contents of which are incorporated by reference. In this application. Technical field

The present invention relates to the field of transportation vehicles, and more particularly to a bottom door auxiliary closing device for a truck. The invention also relates to a truck comprising the above-described bottom door assisted closing device. Background technique

With the rapid development of China's economic construction, the market is increasingly demanding transportation tools, especially various trucks.

In order to increase the speed of unloading of trucks and reduce the labor intensity of workers, many trucks have a bottom door on their bottom wall. When the cargo of the trunk is required to be unloaded, the bottom door is opened, and the cargo is discharged under the action of its own gravity, without requiring the worker to enter the trunk to unload the cargo, which significantly improves the work efficiency in the unloading process and reduces the worker. Labor intensity.

The bottom door can generally be installed on the bottom of the body of the truck through the folding, and can rotate on the vertical plane around the pin of the folding frame as a rotating shaft, and the bottom door gear is welded on the steel structure at the bottom of the body of the truck. To limit the opening when the bottom door is opened, a door bracket is installed at an appropriate position of the bottom door. When the bottom door is closed, the locking of the door bolt in the locking device is used to fix the position of the bottom door when it is closed; when the bottom door is opened, the door bolt in the bottom door locking device is disengaged, The opening operation of the bottom door under the joint action of its own gravity and cargo gravity, the bottom door is rotated downward by a proper angle around the pin of the folding sheet. When the angle of rotation of the bottom door reaches a preset angle, the bottom door is set at The bottom door stop on the vehicle chassis is blocked to limit the continued rotation of the bottom door.

Due to the limitations of the supporting facilities in the truck, the bottom door needs to rely on human power to reset it after the unloading is completed. Most of the bottom doors of trucks are steel plate weldments, and in order to ensure that the bottom door has sufficient strength, rigidity and stability, and because of the structural constraints of the truck itself, the weight of the bottom door is relatively large, generally around 200Kg, thus, During the closing process of the bottom door, the labor intensity of the operator is large, and once the operation fails, the bottom door that is lowered under the action of gravity will bring personal injury to the operator, and there is a serious safety hazard.

Therefore, how to reduce the labor intensity of the operator and improve when the bottom door of the truck is closed Operational safety has become an issue that need to be solved by those skilled in the art. Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bottom door assist closing device which can reduce the labor intensity of an operator during the closing of the bottom door and improve the operational safety; another object of the present invention is to provide a bottom including the above A truck that assists in closing the door.

In order to solve the above technical problems, the present invention provides a bottom door auxiliary closing device including an elastic member mounted between a chassis and a bottom door of a truck to provide the bottom door with a restoring force in a closing direction of the bottom door .

Preferably, the elastic member includes a torsion bar and a connecting rod, one end of the torsion bar is hinged to the first end of the connecting rod, and the other end thereof is fixed at an appropriate position of the bottom door, the connecting rod The second end is hinged to the chassis.

Preferably, the torsion bar further includes a first rod segment, a second rod segment and a torsion portion; the torsion portion is generally disposed along a left-right direction of the truck, and has a first rod segment connected to one end thereof and a connected end portion a second rod segment at an appropriate angle to the bottom door, the other end of the first rod segment is coupled to the chassis, and the other end of the second rod segment is fixedly coupled to the bottom door, and The axis of the first rod segment is at an appropriate angle to the axis of the second rod segment.

Preferably, the chassis comprises a seat plate, and the connecting rod is connected to the chassis through the seat plate. Preferably, further comprising a generally hook-shaped lifting plate mounted to the bottom door, the twisting section of the torsion bar being supported in the hanging plate.

Preferably, the number of the hanging plates is at least two, and supports are respectively supported at both ends of the torsion section.

The present invention also provides a truck comprising the bottom door assist closing device of any of the above. Preferably, a fixing device fixedly coupled to the chassis is further included to fix a position when the bottom door is closed.

Preferably, the fixing device comprises a fixing seat fixed at an appropriate position of the chassis, and a locking hook hinged to the fixing seat.

The bottom door auxiliary closing device provided by the present invention comprises an elastic member mounted between the bottom frame and the bottom door of the truck, and the elastic member has a restoring force to the bottom door in the closing direction of the bottom door. When the bottom door is opened, the bottom door generates a pressure against the elastic member opposite to the direction in which the bottom door is closed. When the person is pushed under the push, since the elastic member has a restoring force in the closing direction of the bottom door, the resultant force of the restoring force and the force applied by the worker to the bottom door is equal to the gravity of the bottom door, and the elastic member is opposite to the bottom. The restoring force of the door offsets part of the gravity of the bottom door, so that when the bottom door of the same weight is closed, the force exerted by the staff can be significantly lower, reducing the labor intensity of the staff during the closing of the bottom door, and reducing A security risk.

In a preferred embodiment, the elastic member may include a torsion bar and a connecting rod, one end of the torsion bar is hinged to the first end of the connecting rod, and the other end thereof is fixed at an appropriate position of the bottom door. The second end of the connecting rod is hinged to the chassis. When the bottom door is opened, the torsion bar rotates relative to the rotation point of the bottom door, and at the same time rotates relative to the connection point between the torsion bar and the chassis, the torsion bar forms a restoring force in the closing direction of the bottom door. Generally, under the same strength, the torsion bar has a large restoring force, and the force is relatively stable and the service life is long.

In another preferred embodiment, the torsion bar may further include a torsion section disposed substantially in the direction of the bottom door, the torsion section having one end connected to the first pole section and the other end connected to the bottom door a second rod segment of a suitable angle; the other end of the first rod segment is coupled to the connecting rod, and the other end of the second rod segment is fixedly coupled to the bottom door, and the axis of the first rod segment is appropriate to the axis of the second rod segment angle. When the bottom door is opened, the second rod segment rotates downward with the bottom door along the rotation axis of the bottom door, and the second rod segment cannot move freely to the same angle as the first rod segment due to the limitation of the connecting rod. The rotation angle of the torsion section is different near the first pole section and the second pole section, so that the torsion section forms a certain angle of twist. When the bottom door is closed, the restoring force of the torsion section is released, and the bottom door is formed with a force in the closing direction thereof to achieve the assisting force. The torsion bar of this type has a simple structure, is convenient to process, and has a good assisting effect. DRAWINGS

1 is a schematic structural view of a bottom door auxiliary opening device in a specific embodiment of the present invention;

2 is a schematic structural view showing a bottom door closed state in a specific embodiment of a bottom door auxiliary closing device according to the present invention;

3 is a schematic structural view of a specific embodiment of an elastic member provided by the present invention; FIG. 4 is a schematic structural view of the elastic member shown in FIG. 3 in a leftward direction; FIG. 5 is a schematic structural view of a specific embodiment of a fixing device provided by the present invention. detailed description

The core of the present invention is to provide a bottom door assisting closing device which reduces the labor intensity of the operator during the closing of the bottom door and improves the operational safety; another object of the present invention is to provide a bottom including the above A truck that assists in closing the door.

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

1 and FIG. 2, FIG. 1 is a schematic structural view of a bottom door auxiliary closing device according to an embodiment of the present invention; FIG. 2 is a specific embodiment of the bottom door auxiliary closing device provided by the present invention; The structural schematic diagram of the bottom door in the closed state in the embodiment.

The bottom door auxiliary closing device provided by the present invention comprises an elastic member installed between the underframe 1 and the bottom door 2 of the truck, the elastic member has a restoring force to the bottom door 2, and the direction of the restoring force is along the bottom door 2 Close the direction to push the bottom door to turn in the direction in which the bottom door is closed during the closing of the bottom door.

Obviously, the bottom doors 2 are generally two, and one side of the two bottom doors 2 are respectively hinged to the chassis 1 of the truck through the hinge shaft, and are rotated around the respective hinge axes to open and close the bottom door 2, and close. Device.

The hinge shaft described above may be a pinned pin that is mounted between the bottom door 2 and the chassis 1.

Obviously, the number of the bottom doors 2 is not limited to two, and may be one or more on the premise that the actual working use requirements are satisfied.

The setting direction of the bottom door 2 described above may be longitudinally arranged in the direction in which the truck travels. Of course, the bottom door 2 may also be provided in other manners, for example, in a direction perpendicular to the direction in which the truck is traveling.

When the bottom door is opened, the bottom door generates a pressure opposite to the closing direction of the bottom door to the elastic member, and when the person is pushed and closed, the restoring force and the work are performed because the elastic member has a restoring force in the closing direction of the bottom door. The resultant force of the force applied to the bottom door is equal to the gravity of the bottom door, and the restoring force of the elastic member to the bottom door cancels part of the gravity of the bottom door, thereby exerting the effect of the staff when closing the bottom door of the same weight. The force can be significantly lower, reducing the bottom door closing The labor intensity of the workers in the process and reduces safety hazards.

In a specific embodiment, the elastic member may include a torsion bar 3 and a connecting rod 4, one end of the torsion bar 3 is hinged to the first end of the connecting rod 4, and the other end thereof is fixed at an appropriate position of the bottom door 2, The second end of the rod 4 is hinged to the chassis 1. During the opening process of the bottom door 2, the torsion bar 3 generates a gradually increasing torsional force under the gravity of the bottom door 2, and when the bottom door is fully opened, the torsion deformation of the torsion bar 3 is maximized, and the torsional force is also The maximum value is reached. Obviously, the direction of the torsional force should be opposite to the direction of gravity of the bottom door 2, that is, the direction of the torsional force is in the direction in which the bottom door 2 is closed; when the bottom door is closed, the direction of gravity of the bottom door 2 is The opposite twisting force can balance a part of the gravity, and the combined force of the upward driving force applied by the worker to the bottom door 2 and the torsional force of the torsion bar 3 is greater than the gravity of the bottom door 2, that is, the torsional force of the torsion bar 3 is shared. The work of the staff to overcome the gravity of the bottom door has played a role in assisting. The torsion bar 3 can withstand large torsional deformation, and has a strong load bearing capacity and a long service life.

The elastic member may also be specifically a pneumatic rod disposed between the bottom door 2 and the chassis 1. The pneumatic rod has one end fixed to the bottom door 2 and the other end fixed to the proper position of the chassis 1 when the bottom door is closed. The pneumatic rod can play a role in assisting.

Obviously, the above elastic member is not limited to the torsion bar 3, and its main function is to store energy in a deformed form when the bottom door is opened, and release the stored energy in the form of power when the bottom door is closed. That is, the bottom door generates a force in the closing direction, thereby achieving the purpose of assisting. In actual production, other components that can contribute to the function can also be used as elastic members, such as springs having sufficient restoring force, and the specific form of the elastic members should not be limited by the present specification.

Further improvements can be made to the bottom door assist closing device provided by the present invention.

Please refer to Figure 3 and Figure 4, and please refer to Figure 1 and Figure 2 together. 3 is a schematic structural view of a specific embodiment of a torsion bar according to the present invention; and FIG. 4 is a structural schematic view of the torsion bar shown in FIG. 3 in a leftward direction.

In another embodiment, the torsion bar 3 may further include a torsion section 33 disposed substantially in the left-right direction of the truck. The torsion section 33 is connected to the first rod section 31 at one end thereof and has the other end connected thereto. a second rod segment 32 at an appropriate angle to the bottom door 2; the other end of the first rod segment 31 is connected to the connecting rod 4, the other end of the second rod portion 32 is connected to the bottom door 2, and the first rod portion 31 is The axis is at an appropriate angle to the axis of the second rod segment 32. The left and right directions of the truck are specifically the left side and the right side determined by the traveling direction of the truck.

The first rod segment 31 and the torsion portion 33 may be of a one-piece structure, and may be formed by bending the same rod or by a split structure, for example, by welding the two rods at an angle. Correspondingly, the torsion section 33 and the second rod section 32 may also be an integral structure, that is, formed by bending the same rod, or may be a split structure, or may be fixedly connected by welding or the like. Way to connect. It should be pointed out that the above-mentioned fixed connection is to be able to achieve a firm and reliable connection, if the connection has sufficient resistance to torsion.

The first rod section 31 and the torsion section 33 can be smoothly connected by the circular arc section to optimize the stress state of the joint portion, thereby improving the torsion resistance and the service life of the joint portion. Correspondingly, for the same reason, the above-mentioned torsion section 33 and the second rod section 32 can also be smoothly connected by the arc segments. The specific size of the above-mentioned circular arc segment should be determined according to the magnitude of the torsional force experienced in the work, and the value of the specific size should not be limited by the present specification.

When the bottom door 2 is opened, one end of the second rod segment 32 fixed at one end thereof to the bottom door 2 is rotated about the bottom point 2 around the point A (the point A is shown in FIG. 1 and FIG. 2 as the bottom door). 2 is a connection point with the chassis 1), and since the first rod segment 31 is fixedly mounted on the chassis 1, the first rod segment 31 is stationary relative to the chassis 1; and at the same time, due to the bottom door 2 and the second The rod segments 32 are at an appropriate angle, and the axis of the first rod segment 31 is also at an appropriate angle to the axis of the second rod segment 32. During the opening of the bottom door 2, the first rod portion 31 and the second rod portion are opened. The angle of the axis of the segment 32 is reduced, the torsion portion 33 has an angular torsion and forms a torsional force of a certain magnitude; and the torsional force of the torsion portion 33 is exerted by the gravity when the bottom door 2 is opened, thus The direction of the torsion should be opposite to the direction of gravity of the bottom door 2. Thus, when the bottom door is closed, the torsion force of the torsion section opposite to the gravity direction of the bottom door 2 pushes the bottom door 2 to close, thereby contributing to the work, reducing the labor intensity of the worker; and, the setting form The torsion bar 3 is reliable in operation, strong in torsion resistance, and has a high service life.

Obviously, the specific form of the above-mentioned torsion bar 3 is not limited to the structure described in the specific embodiment, as long as the bottom door 2 is subjected to the torsion when opened by a reasonable arrangement, and the bottom door is assisted by the torsion force when the bottom door 2 is closed. 2 The function of closing is sufficient, and the specific form thereof should not be limited by the specific embodiment. Based on the above specific embodiments, the bottom door auxiliary closing device provided by the present invention may further include a connecting rod 4, one end of which is hinged at an appropriate position of the chassis 1 and the other end and the first rod segment 31 The articulation, that is to say the first mast 31, is connected to the undercarriage 1 via a connecting rod 4. When the bottom door is opened, the first section 31 of the force is rotated downward with the connecting rod 4 around the connecting rod 4 of the connecting rod 4 and the chassis 1, since the first rod section 31 follows the rotating surface of the connecting rod 4 and the third The connecting rod 33 has a certain angle with the rotating surface of the bottom door 1, and the rotation direction of the end of the torsional section 33 close to the first rod section 31 during the rotation of the first rod section 31 and the second rod section 32 Different from the direction of rotation of the second rod section 32 near one end, the torsion section 33 has a certain degree of twist, thereby generating a torsional force. When the bottom door 1 is closed, the torsional force provides the bottom door 1 with a pushing force in the closing direction of the bottom door 1. The connecting rod 4 is used to ensure that the end of the torsion bar section 2 near the connecting rod 4 rotates around the point B, so that the torsion degree of the torsion bar section 2 is improved during the opening process of the bottom door 2, and the torsion force of the torsion bar section 2 is improved. , which further reduces the labor intensity of the staff.

The connecting rod 4 and the underframe 1 can also be connected by a seat plate 5. The seat plate 5 is mounted at an appropriate position of the chassis 1, and one end of the link 4 is hinged to the seat plate 5 via a hinge shaft, so that the connecting rod 4 is conveniently mounted on the chassis 1, simplifying the installation process; When the connecting rod 4 is worn, it is easy to remove it from the seat plate 5, thereby increasing the maintenance cost of the device.

The seat plate 5 can be fixedly connected to the chassis 1 by welding. Of course, it can also be other fixed connection.

The connecting rod 4 and the seat plate 5 can be connected by a pin to improve the connection performance between the two.

The bottom door 2 may be provided with a generally hook-shaped hanging plate 6 in the appropriate position, and the torsion section 33 of the torsion bar 3 is supported in the hanging plate 6. Thus, the torsion section 33 is fixed in the hanging plate 6 to ensure that the end of the link 4 hinged to the first rod section 31 is rotated about the hinge point A, thereby further improving the operational reliability of the apparatus.

The hanging plates 6 may be two, respectively disposed at opposite ends of the torsion section 33 to form a relatively reliable support.

The hanging plate 6 may be attached to the bottom door 1 by welding, and may of course be other specific fixed connection methods.

It should be noted that in the bottom door auxiliary closing device provided by the present invention, the torsion bar 3 and the bottom The position of the contact point of the door 2 from the rotation axis of the bottom door 2, the specific shape and size of the torsion bar 3, the angle between the torsion bar 3 and the bottom door 2, and the diameter of the torsion bar 3 should be based on the weight of the bottom door 2, the bottom door. The door opening degree of 2 and the shear modulus of the material of the torsion bar 3 are determined, and the values of the specific parameters and the specific mounting dimensions are not limited by the specific embodiments of the present invention. For the above reasons, the appropriate angle and proper position in the text should be understood as follows, when the above parameters change, the angles and the set positions change accordingly, and when the parameters are determined, the angles and the set positions are determined values.

In addition to the above-described bottom door assist closing device, the present invention also provides a truck including the above-described bottom door assisting closing device.

The truck may include fixing means for fixing the position of the bottom door 2 when it is closed, thereby improving the reliability of the bottom door 2 when it is closed.

The above fixing means may include a fixing base 71 welded to the chassis 1, and a lock hook 72 hinged to the fixing base 71, and the bottom door 2 is fixed in the lock hook 72 by the door bracket 21. The position of the bottom door 2 can be more conveniently fixed by the locking hook 72, and the structure is simple and convenient for processing and manufacturing.

Apparently. The connection between the fixing base 71 and the chassis 1 is not limited to welding, and may be other fixed connection methods.

For the specific structure of the other parts of the truck, please refer to the prior art, and the details are not described herein. The foregoing detailed description of an embodiment of the truck and its bottom door assist closing device provided by the present invention is provided only to aid in understanding the method of the present invention and its core idea. It should be noted that those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the invention.

Claims

Rights request

A bottom door auxiliary closing device, comprising: an elastic member mounted between a chassis (1) and a bottom door (2) of a truck to provide the bottom door (2) with a closing direction thereof Resilience.

The bottom door auxiliary closing device according to claim 1, wherein the elastic member comprises a torsion bar (3) and a connecting rod (4); one end of the torsion bar (3) and the connecting rod The first end of (4) is hinged, and the other end thereof is mounted at an appropriate position of the bottom door (2), and the second end of the connecting rod (4) is hinged to the chassis (1).

The bottom door auxiliary closing device according to claim 2, wherein the torsion bar (3) further comprises a first rod segment (31), a second rod segment (32) and a torsion portion (33); The torsion section (33) is disposed substantially in a left-right direction of the truck, and has a first rod section (31) connected to one end thereof and a second rod section at an appropriate angle to the bottom door (2) (32), the other end of the first rod segment (31) is connected to the first end of the connecting rod (4), and the other end of the second rod portion (32) is fixedly connected to the bottom door ( 2), and the axis of the first rod segment (31) is at an appropriate angle to the axis of the second rod segment (32).

The bottom door auxiliary closing device according to any one of claims 2 or 3, wherein the chassis (1) comprises a seat plate (5) through which the connecting rod (4) passes (5) is connected to the chassis (1).

The bottom door auxiliary closing device according to any one of claims 2 or 3, further comprising a substantially hook-shaped hanging plate (6) mounted to the bottom door (2), the twist The torsion section (33) of the rod (3) is supported in the suspension plate (6).

The bottom door auxiliary closing device according to claim 5, characterized in that the lifting plates (6) are at least two and each of the two ends of the torsion section (33) is supported.

A truck characterized by comprising the bottom door auxiliary closing device according to any one of claims 1 to 6.

A truck according to claim 7, further comprising fixing means fixedly coupled to said chassis (1) for fixing a position at which said bottom door (2) is closed.

The truck according to claim 8, wherein the fixing device comprises a fixing seat (71) fixed to an appropriate position of the chassis (1), and hinged to the fixing seat (71) The upper hook (72).