Rear unloading vehicle compartment door opening and closing locking mechanism and rear unloading vehicle

Abstract

The utility model provides a rear unloading vehicle carriage door opening and closing locking mechanism and a rear unloading vehicle, the rear unloading vehicle carriage door opening and closing locking mechanism comprises a carriage edge beam, a rear stand column, a frame cross beam and a rear sealing frame defined by a pair of carriage bottom plates, a telescopic mechanism parallel to a rear carriage door is arranged in the rear sealing frame, and a rear carriage door hook is arranged on the inner side of the bottom of the rear carriage door. The telescopic mechanism is provided with an L-shaped hydraulic door opening plate used for hooking the rear compartment door hook. According to the rear unloading vehicle compartment door opening and closing locking mechanism, redundant external structures can be reduced, and the phenomenon that a lock is clamped and damaged when goods are loaded and unloaded is avoided.

Description

Technical Field

[0001] The utility model relates to the field of dump trucks, in particular to an opening and closing locking mechanism for a compartment door of a rear dump truck and a rear dump truck. Background Art

[0002] Traditional dump trucks are equipped with a chain door opening mechanism for the rear door, which cooperates with the lifting and lowering actions of the car body to control the opening and closing of the rear door. However, the locking force of the traditional chain door opening mechanism is relatively small, and the chain is often stretched and easily deformed, resulting in the rear door and the car body sealing strip cannot be completely locked. When transporting muddy goods, dripping is prone to occur, which not only pollutes the urban environment, but also affects road traffic safety.

[0003] In order to improve the sealing performance of the rear door of a dump truck, a utility model patent with the authorization announcement number CN214164813U discloses a hydraulic sideboard locking device for a dump truck, including a compartment floor, a rear compartment door, a double-acting oil cylinder, two hydraulic lock hooks driven by the double-acting oil cylinder, and a locking block respectively arranged for each of the hydraulic lock hooks, the middle parts of the two hydraulic lock hooks are hinged at the bottom of the rear end of the compartment floor, the two locking blocks are protruding and arranged at the bottom of the rear compartment door, the double-acting oil cylinder is arranged horizontally, the piston rod end and the cylinder end of the double-acting oil cylinder are respectively hinged to the driving ends of the two hydraulic lock hooks, and the lock hook end of the hydraulic lock hook can lock or release the locking block through the extension and contraction of the double-acting oil cylinder. The hydraulic sideboard locking device for dump trucks has the advantages of scientific design, strong locking force, good sealing effect, and good environmental protection. However, the device relies on rotating parts for locking and has many leaking parts, which is prone to jamming and damage during loading and unloading of goods. Utility Model Content

[0004] In order to reduce redundant external structures and avoid the locks from getting stuck and damaged when loading and unloading goods, the technical solution adopted by the utility model is: a rear unloading compartment door opening and closing locking mechanism, including a rear sealing frame formed by a compartment side beam, a rear pillar, a frame cross beam and a pair of compartment floor plates, a telescopic mechanism parallel to the rear compartment door is arranged in the rear sealing frame, a rear compartment door hook is arranged on the inner side of the bottom of the rear compartment door, and an L-shaped hydraulic door opening plate for hooking the rear compartment door hook is arranged on the telescopic mechanism.

[0005] Based on the above, the telescopic mechanism includes a hydraulic cylinder, a gas cylinder or an electric telescopic rod. Preferably, the telescopic mechanism uses a hydraulic cylinder, which utilizes the lifting oil circuit system of the rear unloading plate.

[0006] Based on the above, in order to get rid of the limitation of the telescopic mechanism's own length, the telescopic end of the telescopic mechanism is connected with a hydraulic door opening rod parallel to the rear door, and the L-shaped hydraulic door opening plate is arranged on the side of the hydraulic door opening rod relative to the rear door.

[0007] Based on the above, in order to increase the number of locking points for locking the rear compartment panel and improve the uniformity of the distribution of the locking points, a plurality of L-shaped hydraulic door opening plates are provided on the telescopic mechanism, and the plurality of L-shaped hydraulic door opening plates are arranged at equal intervals.

[0008] Based on the above, in order to get rid of the limitation of the length of the telescopic mechanism itself and ensure the parallelism of the telescopic mechanism pushing the L-shaped hydraulic door opening plate, the telescopic end of the telescopic mechanism is connected to a pair of the hydraulic door opening rods, and the pair of the hydraulic door opening rods are connected in parallel through a connecting ring, one of the hydraulic door opening rods is directly connected to the telescopic end of the telescopic mechanism, and the other hydraulic door opening rod is provided with the L-shaped hydraulic door opening plate.

[0009] Based on the above, in order to facilitate the hook connection between the rear compartment door hook and the L-shaped hydraulic door opening plate, a notch for the rear compartment door hook to be inserted is provided at the rear of the rear sealing frame.

[0010] Based on the above, the length values ​​of the pair of hydraulic door opening rods are different.

[0011] Based on the above, the opening directions of the multiple L-shaped hydraulic door opening panels are the same.

[0012] The utility model also provides a rear dump truck, which is equipped with the above-mentioned rear dump truck compartment door opening, closing and locking mechanism.

[0013] The utility model has substantial features and progress compared with the prior art. Specifically, the utility model provides a rear unloading compartment door opening and closing locking mechanism, a rear compartment door hook is set at the bottom of the rear compartment door, a set of telescopic mechanisms capable of horizontally hooking the rear compartment door hook is added at the rear of the rear compartment, and the telescopic mechanism is installed on the inner side of the rear sealing frame, designed as a concealed structure, which does not occupy the outer dimensions of the compartment and reduces redundant external structures. The opening and closing action of the horizontal movement hook is adopted, thereby avoiding the door opening and closing mode that needs to be rotated, closed and clamped, and avoiding the jamming and damage of the lock when loading and unloading goods.

[0014] Furthermore, in order to meet the needs of opening and closing the trunk door, multiple trunk door hooks are added at the rear door, and at the same time, a notch for inserting the trunk hook needs to be added at the rear sealing frame, so that when the trunk door is closed under the action of its own weight, the trunk hook can pass through the rear sealing frame to ensure that the L-shaped hydraulic door opening panel can hook and lock the trunk door, thereby increasing the safety of the trunk door locking.

[0015] Furthermore, by arranging two parallel hydraulic door opening rods on the telescopic mechanism and fixing the two with a connecting ring, the parallelism of the telescopic mechanism pushing the L-shaped hydraulic door opening plate is ensured.

[0016] Furthermore, the oil circuit in the hydraulic cylinder of the telescopic mechanism can utilize the lifting oil circuit system of the rear unloading plate, and the remote control system can be used to activate the hydraulic cylinder to realize the opening, closing and locking actions of the rear unloading compartment door. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of the structure of the opening, closing and locking mechanism of the rear unloading compartment door from the top perspective.

[0018] Figure 2 The utility model is a schematic diagram of the partial structure of the opening, closing and locking mechanism of the rear unloading compartment door provided by the utility model from a side view.

[0019] Figure 3 and Figure 4 The utility model is a partial structural schematic diagram of the opening, closing and locking mechanism of the rear unloading compartment door.

[0020] In the figure: 1. frame crossbeam; 2. rear sealing frame; 3. rear compartment door hook; 4. L-shaped hydraulic door opening plate; 5. rear compartment door; 6. connecting ring; 7. hydraulic door opening rod; 8. cylinder hinge seat; 9. rear crossbeam; 10. hydraulic cylinder; 11. rear pillar; 12. compartment side beam; 13. compartment floor. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0022] Example 1

[0023] This embodiment provides a rear unloading vehicle compartment door opening and closing locking mechanism and a rear unloading vehicle, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the rear sealing frame 2 is formed by the side beams 12 of the carriage, the rear pillars 11, the frame cross beams 1 and a pair of carriage bottom plates 13. A telescopic mechanism parallel to the rear box door 5 is arranged in the rear sealing frame 2.

[0024] A rear door hook 3 is arranged on the inner side of the bottom of the rear door 5 , and an L-shaped hydraulic door opening plate 4 for hooking the rear door hook 3 is arranged on the telescopic mechanism.

[0025] Specifically, the rear door hook is a rectangular steel plate with a through hole. The L-shaped hydraulic door opening plate is an L-shaped steel plate, and the open end of the L-shaped steel plate can be movably inserted into the through hole on the rectangular steel plate to form a hook connection.

[0026] In this embodiment, the telescopic mechanism includes a hydraulic cylinder 10. A cylinder hinge seat 8 is provided inside one of the rear pillars 11, and the hydraulic cylinder 10 is hinged on the cylinder hinge seat 8. Specifically, Figure 1 and Figure 3 As shown, in order to get rid of the limitation of the telescopic mechanism's own length, the telescopic end of the hydraulic cylinder 10 is connected with a pair of hydraulic door opening rods 7. The pair of hydraulic door opening rods 7 are connected in parallel through a connecting ring 6. One of the hydraulic door opening rods 7 is directly connected to the telescopic end of the hydraulic cylinder 10, and the other hydraulic door opening rod 7 is provided with the L-shaped hydraulic door opening plate 4.

[0027] Specifically, for the sake of distinction, the hydraulic door opening rod directly connected to the telescopic end of the hydraulic oil cylinder 10 is recorded as the first hydraulic door opening rod. The hydraulic door opening rod on which the L-shaped hydraulic door opening plate is arranged is recorded as the second hydraulic door opening rod. And the length of the first hydraulic door opening rod is less than the length of the second hydraulic door opening rod.

[0028] Specifically, in this embodiment, in order to facilitate the hooking connection between the rear door hook 3 and the L-shaped hydraulic door opening plate 4, a notch for inserting the rear door hook 3 is opened on the rear cross beam 9 of the rear sealing frame 2.

[0029] Example 2

[0030] The present embodiment provides a rear unloading compartment door opening and closing locking mechanism, which differs from Embodiment 1 in that, in the present embodiment: in order to increase the number of locking points for locking the rear compartment panel and to improve the uniformity of the distribution of the locking points, a plurality of L-shaped hydraulic door opening plates are provided on the telescopic mechanism, and the plurality of L-shaped hydraulic door opening plates are arranged at equal intervals.

[0031] Example 3

[0032] This embodiment provides an opening, closing and locking mechanism for a rear unloading compartment door, which differs from Embodiment 1 in that, in this embodiment: the opening directions of the plurality of L-shaped hydraulic door opening panels are the same.

[0033] Example 4

[0034] This embodiment provides a rear unloading compartment door opening and closing locking mechanism, which is different from Embodiment 1 in that, in this embodiment: the telescopic end of the hydraulic cylinder is detachably connected to a hydraulic door opening rod via a pin shaft and a bushing.

[0035] Example 5

[0036] This embodiment provides a rear dump truck, which is equipped with the rear dump truck compartment door opening and closing locking mechanism described in any one of Embodiments 1 to 4.

[0037] Specifically, the specific working process of the opening, closing and locking mechanism of the rear unloading compartment door provided by the utility model is as follows:

[0038] When the rear door needs to be opened, the hydraulic cylinder drives the first hydraulic door opening rod to retract backward, and then drives the second hydraulic door opening rod to translate backward. During the translation process, the rear door hook is disengaged from the through hole on the L-shaped hydraulic door opening plate, so that the bottom of the rear door is in a free state.

[0039] When the trunk door needs to be closed, first the trunk door hook is inserted into the rear sealing frame under the action of its own weight, and then the hydraulic cylinder drives the first hydraulic door opening rod to extend forward, and then drives the second hydraulic door opening rod to move forward horizontally. During the translation process, one end of the L-shaped hydraulic door opening plate is inserted into the through hole on the trunk door hook, forming a hook connection relationship, thereby locking the trunk door.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A rear unloading compartment door opening and closing locking mechanism, characterized in that: It includes a rear sealing frame formed by a car body side beam, a rear pillar, a frame cross beam and a pair of car body bottom plates. A telescopic mechanism parallel to a rear box door is arranged in the rear sealing frame. A rear box door hook is arranged on the inner side of the bottom of the rear box door. An L-shaped hydraulic door opening plate for hooking the rear box door hook is arranged on the telescopic mechanism.

2. The rear unloading compartment door opening and closing locking mechanism according to claim 1, characterized in that: The telescopic mechanism comprises a hydraulic cylinder, a gas cylinder or an electric telescopic rod.

3. The rear unloading compartment door opening and closing locking mechanism according to claim 1, characterized in that: The telescopic end of the telescopic mechanism is connected with a hydraulic door opening rod parallel to the rear box door, and the L-shaped hydraulic door opening plate is arranged on a side of the hydraulic door opening rod relative to the rear box door.

4. The rear unloading compartment door opening and closing locking mechanism according to claim 1 or 3, characterized in that: The telescopic mechanism is provided with a plurality of L-shaped hydraulic door opening plates, and the plurality of L-shaped hydraulic door opening plates are arranged at equal intervals.

5. The rear unloading compartment door opening and closing locking mechanism according to claim 3, characterized in that: The telescopic end of the telescopic mechanism is connected to a pair of hydraulic door opening rods, which are connected in parallel via a connecting ring, one of the hydraulic door opening rods is directly connected to the telescopic end of the telescopic mechanism, and the other hydraulic door opening rod is provided with the L-shaped hydraulic door opening plate.

6. The rear unloading compartment door opening and closing locking mechanism according to claim 1, 2, 3 or 5, characterized in that: The rear portion of the rear sealing frame is provided with a notch for the rear compartment door hook to be inserted.

7. The rear unloading compartment door opening and closing locking mechanism according to claim 5, characterized in that: The length values ​​of a pair of hydraulic door opening rods are different.

8. The rear unloading compartment door opening and closing locking mechanism according to claim 4, characterized in that: The opening directions of the multiple L-shaped hydraulic door opening panels are the same.

9. A rear dump truck, characterized in that: The rear dump truck is equipped with a rear dump truck compartment door opening, closing and locking mechanism according to any one of claims 1 to 8.

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