Tray traction device

Abstract

The utility model discloses a traction device of a tray, and relates to the field of characteristic operation vehicles, the traction device comprises an auxiliary frame, a locking mechanism and a roller group; when the tray needs to be detached, the two-way telescopic part of the locking mechanism shrinks to drive the two lock head assemblies to be connected with the tray in a clamped mode, then the telescopic driving part drives the cross beam and the tray to roll to the preset position in the length direction of the auxiliary frame through the roller sets, and then the tray is detached. And an external lifting device can be conveniently connected and matched with a preset part of the tray, and the tray is pushed down to the ground to be unloaded. Through cooperation of the lock head assembly and the telescopic driving piece, the stability of the tray in the moving process can be guaranteed, the problem that a lifting hook of a lifting device cannot reach the initial position of the tray easily can be solved, and the flexibility of arrangement of other structures of the vehicle is greatly improved.

Description

Technical Field

[0001] This application relates to the field of special operation vehicles, and particularly to a towing device for a pallet. Background Art

[0002] The whole vehicle loader / unloader is a common transportation tool at present. The existing loader / unloader uses a lifting device to drive the pallet to slide on the subframe and push it off the subframe to the ground to achieve unloading. Conversely, loading is achieved by using the lifting device to tow the pallet back onto the subframe.

[0003] The existing structure has the following problems. Limited by the folding angle of the lifting device, when the pallet is in the initial position on the subframe, it is difficult for the hook on the lifting device to move to the mating point connected to the pallet. Due to such limitations, there are relatively high requirements for the structural design and installation position of the lifting device. Summary of the Utility Model

[0004] An embodiment of this application provides a towing device for a pallet, which can achieve stable movement of the pallet.

[0005] This application provides a towing device for a pallet, including a subframe, a locking mechanism, and a roller group; the subframe is arranged on an external vehicle body; the locking mechanism includes a cross beam, a telescopic driving member, a bidirectional telescopic member, and two locking head assemblies; the cross beam is movably arranged on the subframe along the length direction of the subframe; one end of the telescopic driving member is connected to the subframe, and the other end is connected to the cross beam, and the telescopic direction of the telescopic driving member is configured as the length direction of the subframe; the bidirectional telescopic member is arranged in the cross beam, and the telescopic direction of the bidirectional telescopic member is configured as the length direction of the cross beam; the two locking head assemblies are respectively connected to both ends of the bidirectional telescopic member, and the locking head assemblies can be connected to the pallet; the roller group is arranged on the subframe and can be in rolling contact with the pallet.

[0006] The towing device for a pallet of this application has at least the following beneficial effects:

[0007] The towing device of this application includes a subframe, a locking mechanism, and a roller group; when it is necessary to unload the pallet, the bidirectional telescopic member of the locking mechanism contracts, thereby driving the two locking head assemblies to be clamped and connected to the pallet. Then, the telescopic driving member drives the cross beam and the pallet to roll to a predetermined position along the length direction of the subframe with the help of the roller group, which is convenient for the external lifting device to be connected and mated with a predetermined part of the pallet, and push the pallet to the ground to achieve unloading. In this application, through the cooperation of the locking head assembly and the telescopic driving member, the stability of the pallet during movement can be ensured, the problem that the hook of the lifting device is not easily reachable to the initial position of the pallet can be solved, and the flexibility of the setting of other structures of the vehicle is greatly improved. Description of the Drawings

[0008] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0009] Figure 1 is the structural diagram of the traction device of the present application;

[0010] Figure 2 is the exploded view of the traction device of the present application;

[0011] Figure 3 is the process diagram of the pallet unloading of the present application;

[0012] The descriptions of the reference numerals are as follows:

[0013] 100, traction device;

[0014] 10, subframe; 11, main beam; 12, strengthening beam; 13, guide rail;

[0015] 20, locking mechanism; 21, cross beam; 22, telescopic driving member; 23, bidirectional telescopic member; 24, lock head assembly; 241, L-shaped lock arm; 242, bolt; 25, limit bracket; 26, limit wheel; 27, slider;

[0016] 30, roller set; 31, first roller pair; 32, second roller pair;

[0017] 200, pallet;

[0018] 300, external vehicle body;

[0019] 400, lifting device. Detailed Embodiments

[0020] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application and not to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.

[0021] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0022] This embodiment discloses a traction device for a tray. The traction device 100 includes a subframe 10, a locking mechanism 20, and a roller set 30, as Figure 1 and Figure 2 shown, specifically as follows:

[0023] The subframe 10 is fixedly installed on the external vehicle body 300 and is used to carry the tray 200 and other structures. The subframe 10 includes a main beam 11 and a reinforcing beam 12. The two main beams 11 are arranged in parallel and are disposed on the external vehicle body 300; a plurality of reinforcing beams 12 are respectively connected between the two main beams 11, and the overall subframe 10 is fixedly connected through the main beam 11 and the plurality of reinforcing beams 12, with high structural strength and simple manufacturing.

[0024] The locking structure includes a cross beam 21, a telescopic driving member 22 (telescopic oil cylinder), a bidirectional telescopic member 23 (double-headed telescopic oil cylinder), and two locking head assemblies 24. The cross beam 21 is movably arranged on the main beam 11 of the subframe 10, and the moving direction of the cross beam 21 is configured as the length direction of the main beam 11. Among them, the length direction of the cross beam 21 is vertically intersecting with the length direction of the main beam 11 in the horizontal plane; one end of the telescopic driving member 22 is hinged to the reinforcing beam 12, and the other end is hinged to the cross beam 21. The telescopic direction of the telescopic driving member 22 is consistent with the length direction of the main beam 11, and the cross beam 21 is driven by the telescopic driving member 22 to move in the length direction of the main beam 11; the bidirectional telescopic member 23 is arranged on the cross beam 21, and the telescopic direction of the bidirectional telescopic member 23 is parallel to the length direction of the cross beam 21. Both ends of the bidirectional telescopic member 23 are telescopic ends, and the two locking head assemblies 24 are respectively arranged on the two telescopic ends of the bidirectional telescopic member 23. The locking head assemblies 24 are driven by the bidirectional telescopic member 23 to be respectively connected and cooperate with both sides of the tray 200. When it is necessary to unload the tray 200, the locking head assemblies 24 are connected to the tray 200, and then the telescopic driving member 22 drives the cross beam 21, the locking head assemblies 24, and the tray 200 to move in the length direction of the main beam 11.

[0025] The lock head assembly 24 includes an L-shaped lock arm 241 and a bolt 242. A hollow channel is provided inside the cross beam 21, and the hollow channel runs through the cross beam 21 along the length direction of the cross beam 21. The bi-directional telescopic member 23 is arranged inside the hollow channel. The L-shaped lock arms 241 of the two lock head assemblies 24 are respectively slidably arranged at the axial two ends of the hollow channel. Specifically: one end of the L-shaped lock arm 241 is slidably inserted into the hollow channel, and the end inserted into the hollow channel is connected to the telescopic end of the bi-directional telescopic member 23. The bolt 242 is arranged at the other end of the L-shaped lock arm 241. The bolt 242 is located on the side surface of the L-shaped lock arm 241 facing the tray 200. The length direction of the bolt 242 is the same as the length direction of the cross beam 21. Insertion holes corresponding to the bolt 242 one by one are respectively arranged on the left and right sides of the tray 200. The bolt 242 can be inserted into the insertion hole along the length direction of the cross beam 21 or withdrawn from the insertion hole.

[0026] In this embodiment, when the lock head assembly 24 needs to cooperate with the tray 200, the bi-directional telescopic member 23 retracts inward, so that the bolts 242 on the left and right sides are inserted into the insertion holes of the tray 200, thereby realizing the connection with the tray 200.

[0027] In some preferred embodiments, a proximity sensor (not shown) is arranged on the L-shaped lock arm 241. The proximity sensor can detect the distance between the L-shaped lock arm 241 and the tray 200, that is, the distance in the length direction of the cross beam 21. The proximity sensor is electrically connected to the bi-directional telescopic member 23. The arrangement of the proximity sensor in this embodiment can detect the distance from the tray 200, avoid the bi-directional telescopic member 23 driving the bolt 242 to jam the tray 200, and can sense whether the distance between the L-shaped lock arm 241 and the tray 200 is greater than the length of the bolt 242, so as to avoid collision between the bolt 242 and the tray 200.

[0028] In some preferred embodiments, the locking mechanism 20 further includes two limiting brackets 25. The two limiting brackets 25 are oppositely arranged on the cross beam 21 along the length direction of the cross beam 21. Along the length direction of the cross beam 21, at least part of the structure of the tray 200 is located between the two limiting brackets 25. The left and right offsets of the tray 200 (the left and right directions are the length direction of the cross beam 21) can be limited by the two limiting brackets 25, so that the tray 200 can only move along the length direction of the main beam 11 on the subframe 10.

[0029] In some preferred embodiments, guide rails 13 are provided on both main beams 11, and the length direction of the guide rails 13 is consistent with the length direction of the main beam 11. A slider 27 is provided under the cross beam 21 of the locking mechanism 20, and the lower surface of the slider 27 is in sliding contact with the upper surface of the guide rail 13. A limiting wheel 26 corresponding to the guide rail 13 is also provided under the cross beam 21, and the outer peripheral surface of the limiting wheel 26 is in rolling contact with the horizontal inner surface of the guide rail 13. In this embodiment, two left and right limiting wheels 26 are provided under the cross beam 21. The two limiting wheels 26 are located between the two guide rails 13, which can prevent the cross beam 21 from deviating and play a role in limiting and assisting the movement of the cross beam 21.

[0030] The roller group 30 is arranged on the sub-frame 10 and can roll with the pallet 200. The roller group 30 supports the pallet 200 and rolls with the lower surface of the pallet 200 when the pallet 200 moves, thereby ensuring smooth movement of the pallet 200. The roller group 30 includes a plurality of first roller pairs 31 arranged on the main beam 11 at intervals along the length direction of the sub-frame 10. The first roller pair 31 includes two first rollers arranged on the main beam 11 opposite to each other along the length direction of the cross beam 21. The outer peripheral surface of the first roller can roll with the lower surface of the pallet 200.

[0031] In some preferred embodiments, the roller group 30 also includes a second roller pair 32, and the number of the second roller pair 32 is one, wherein the second roller pair 32 is arranged at the rear end of the sub-frame 10, and the rear end of the sub-frame 10 refers to the end of the sub-frame 10 away from the cross beam 21, and the second roller pair 32 includes two second rollers relatively arranged on the main beam 11 along the length direction of the cross beam 21. From the perspective of the length direction of the main beam 11, there is a predetermined angle θ between the axial direction of the second roller and the horizontal plane, and the predetermined angle θ can be 20 degrees to 50 degrees. By tilting the second rollers so that the two second rollers are arranged in a V shape, the pallet 200 can be guided and centered, especially when the pallet 200 is just placed on the sub-frame 10 or the right end of the pallet 200 is about to detach from the sub-frame 10 and fall onto the ground, the two second rollers can guide the pallet 200, which is of great significance for structural stability.

[0032] A working mode of the traction device of this embodiment is as follows:

[0033] When you need to unload tray 200: Figure 3 As shown, the latch 242 of the lock assembly is inserted into the latch holes on both sides of the tray 200 under the drive of the two-way telescopic member 23, and then the telescopic driving member 22 drives the crossbeam 21, the lock assembly 24 and the tray 200 to slide backward along the length direction of the main beam 11 for a distance;

[0034] The hook of the lifting device 400 on the vehicle is connected to the pallet 200, and then the two-way telescopic member 23 drives the latch 242 to disengage from the latch hole and release the pallet 200, and the lifting device 400 pushes the pallet 200 to slide backward along the length direction of the sub-frame 10, and the first roller pair 31 rolls and supports the pallet 200 during the sliding process;

[0035] As the pallet 200 gradually moves backward, the rear end (left end) of the pallet 200 contacts the ground first, and the rear end of the pallet 200 is provided with a contact wheel that contacts the ground. The pallet 200 slides backward with the help of the contact wheel. When the right end of the pallet 200 is about to leave the sub-frame 10, the lifting device 400 continues to hold the right end of the pallet 200 and gently puts it on the ground to prevent the pallet 200 from hitting the ground. At this time, the pallet 200 is completely separated from the sub-frame 10, and the unloading is completed.

[0036] When it is necessary to load the pallet 200: the hook of the lifting device 400 is connected to the pallet 200, and then the right end of the pallet 200 is placed on the first roller pair 31, and the lifting device 400 continues to drag the pallet 200 along the length direction of the main beam 11, so that the pallet 200 returns to the sub-frame 10, and when the pallet 200 is dragged to the predetermined position, the cross beam 21 is driven by the telescopic drive member 22 to the front of the pallet 200, and then the pin 242 of the lock assembly is inserted into the pin holes on both sides of the pallet 200 under the drive of the two-way telescopic member 23, and the telescopic drive member 22 drives the cross beam 21, the lock assembly 24 and the pallet 200 to slide forward along the length direction of the main beam 11 to the initial position of the pallet 200, and the loading is completed.

[0037] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A traction device for a pallet, characterized in that: It comprises a sub-frame (10), a locking mechanism (20) and a roller assembly (30); The subframe (10) is arranged on the external vehicle body; The locking mechanism (20) comprises a crossbeam (21), a telescopic driving member (22), a two-way telescopic member (23) and two locking head assemblies (24); The crossbeam (21) is movably arranged on the sub-frame (10) along the length direction of the sub-frame (10); one end of the telescopic driving member (22) is connected to the sub-frame (10), and the other end is connected to the crossbeam (21), and the telescopic direction of the telescopic driving member (22) is configured to be the length direction of the sub-frame (10); the bidirectional telescopic member (23) is arranged in the crossbeam (21), and the telescopic direction of the bidirectional telescopic member (23) is configured to be the length direction of the crossbeam (21); two locking head assemblies (24) are respectively connected to the two ends of the bidirectional telescopic member (23), and the locking head assemblies (24) can be connected to the tray (200); The roller group (30) is arranged on the auxiliary frame (10) and is capable of rolling contact with the tray (200).

2. The traction device for a pallet according to claim 1, characterized in that: The subframe (10) comprises a main beam (11) and a reinforcing beam (12), wherein the reinforcing beam (12) is connected between two parallel main beams (11); and the cross beam (21) is movably arranged on the main beam (11).

3. The traction device for a pallet according to claim 2, characterized in that: A guide rail (13) is arranged on the main beam (11), the cross beam (21) is in sliding contact with the upper surface of the guide rail (13), and a limiting wheel (26) corresponding to the guide rail (13) is arranged below the cross beam (21), and the limiting wheel (26) is in rolling contact with the inner side surface of the guide rail (13).

4. The traction device for a pallet according to claim 1, characterized in that: The lock assembly (24) comprises an L-shaped lock arm (241) and a latch (242); a hollow channel is arranged inside the crossbeam (21), a two-way telescopic member (23) is arranged in the hollow channel, one end of the L-shaped lock arm (241) is slidably inserted in the hollow channel and connected to the two-way telescopic member (23); the latch (242) is arranged at the other end of the L-shaped lock arm (241), a latch hole matching the latch (242) is arranged on the tray (200), and the length direction of the latch (242) is consistent with the length direction of the crossbeam (21).

5. The traction device for a pallet according to claim 4, characterized in that: The L-shaped locking arm (241) is provided with a proximity sensor for detecting the distance between the tray (200) and the L-shaped locking arm (241) in the length direction of the crossbeam (21).

6. The traction device for a pallet according to claim 4, characterized in that: The locking mechanism (20) further comprises two limit brackets (25), the two limit brackets (25) being arranged on the cross beam (21) in a relative manner along the length direction of the cross beam (21), and at least a part of the structure of the tray (200) is located between the two limit brackets (25) along the length direction of the cross beam (21).

7. The traction device for a pallet according to claim 1, characterized in that: The roller group (30) comprises a plurality of first roller pairs (31) arranged along the length direction of the auxiliary frame (10), and the first roller pair (31) comprises two first rollers arranged opposite to each other along the length direction of the crossbeam (21).

8. The traction device for a pallet according to any one of claims 1 to 7, characterized in that: The roller group (30) further comprises a second roller pair (32), the second roller pair (32) being arranged at the rear end of the sub-frame (10), the second roller pair (32) comprising two second rollers arranged on the sub-frame (10) in a direction along the length of the crossbeam (21) relative to each other, the axial direction of the second rollers being at a predetermined angle θ with the horizontal plane, and the two second rollers being arranged in a V-shape.

9. The traction device for a pallet according to claim 8, characterized in that: The predetermined angle θ is 20 degrees to 50 degrees.

10. The traction device for a pallet according to claim 1, characterized in that: The telescopic driving member (22) is configured as a telescopic oil cylinder, and the bidirectional telescopic member (23) is configured as a double-head telescopic oil cylinder.

Images