Rear door structure of suction-type sewer scavenger

Abstract

The utility model relates to a rear door structure of a suction-type sewer scavenger, which is characterized in that a semicircular box body opening is arranged at the rear end of a box body of the suction-type sewer scavenger, and a sealing plate is fixed above the box body opening; the rear door is semicircular and can completely cover the opening of the box body; a sealing rubber strip is arranged on the junction surface of the rear door and the opening of the box body; the two sides of the upper end of the rear door are hinged to the lower end of a sealing plate through pin shafts. An oil cylinder is hinged to the sealing plate, the push rod end of the oil cylinder is hinged to the middle of the rear door through a connecting rod mechanism, and the oil cylinder stretches out and draws back and controls opening and closing of the rear door through the connecting rod mechanism. According to the utility model, the box body rear door adopts the semicircular opening design to ensure that sewage and gravel can be smoothly discharged, and meanwhile, the length of a rear door rubber strip is reduced, so that the risk of air leakage of the rubber strip is reduced, and the weight of the rear door is reduced; the rear door is controlled to be opened and closed through the single oil cylinder and the connecting rod device, and meanwhile the connecting rod device has a self-locking function and can ensure that the rear door is tightly attached to the box body.

Description

Technical Field

[0001] This utility model relates to the field of sewage suction truck technology, specifically to a rear door structure for a sewage suction truck. Background Technology

[0002] The existing sewage suction trucks generally use a one-piece rear door, which has the following problems in actual use:

[0003] 1. If the rear door rubber strip is too long, it is easy to cause air leakage, which will affect the sealing performance and working efficiency of the vacuum truck.

[0004] 2. The integrated rear door is relatively heavy, which not only increases the vehicle's load-bearing burden but also leads to higher costs.

[0005] 3. The integrated rear door opening cylinder generally has a long stroke, which makes the purchase and maintenance costs of the cylinder relatively high.

[0006] 4. To prevent internal leakage of the hydraulic cylinder, the integrated rear door is usually fixed with multiple pins, which makes the locking process cumbersome, affecting work efficiency and increasing the workload of operators. Summary of the Invention

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a rear door structure for a vacuum truck, so as to solve the problems of easy air leakage, heavy weight and high cost, long stroke of opening cylinder and high cost, and troublesome locking of the existing vacuum truck's integrated rear door rubber strip.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A rear door structure for a vacuum truck includes a vacuum truck body and a rear door. The rear end of the vacuum truck body is provided with a semi-circular opening, and a sealing plate is fixed above the opening.

[0010] The rear door is semi-circular and can completely cover the box opening; a sealing strip is provided at the joint surface between the rear door and the box opening.

[0011] The upper sides of the rear door are hinged to the lower end of the sealing plate by pins.

[0012] A hydraulic cylinder is hinged to the sealing plate. The push rod end of the hydraulic cylinder is hinged to the middle of the rear door through a linkage mechanism. The extension and retraction of the hydraulic cylinder controls the opening and closing of the rear door through the linkage mechanism.

[0013] Furthermore, the linkage mechanism includes a first link, a second link, and a third link;

[0014] A horizontally positioned pivot is fixed in the middle of the rear door;

[0015] One end of the first connecting rod is hinged to the middle of the rotating shaft via a pin, and the other end of the first connecting rod is hinged to the lower end of the rear door via a pin.

[0016] One end of the second link is hinged to the middle of the first link by a pin, and the other end of the second link is hinged to one end of the third link by a pin.

[0017] The other end of the third link is hinged to the middle of the rear door via a pin, and the middle of the third link is hinged to the push rod end of the hydraulic cylinder via a pin.

[0018] Furthermore, the outer perimeter of the box opening is provided with an flared edge.

[0019] The present invention adopts the above technical solution and has the following beneficial technical effects: the rear door of the box adopts a semi-circular opening design to ensure that sewage and sand can be discharged smoothly, while reducing the length of the rear door rubber strip, thereby reducing the risk of air leakage of the rubber strip and reducing the weight of the rear door; the opening and closing of the rear door is controlled by a single oil cylinder and a linkage device, and the linkage device has a self-locking function to ensure that the rear door and the box are tightly fitted. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] Figure 1 This is a schematic diagram of the rear door of this utility model when it is closed;

[0022] Figure 2 This is a schematic diagram of the rear door of this utility model when it is opened. Detailed Implementation

[0023] like Figure 1-2 As shown, the present invention discloses a rear door structure for a vacuum truck, including a vacuum truck body 1 and a rear door 2. The rear end of the vacuum truck body 1 is provided with a semi-circular opening, and a sealing plate 9 is fixed above the opening.

[0024] The rear door 2 is also designed to be semi-circular, and it can completely cover the opening of the box; a sealing strip is provided at the joint surface between the rear door 2 and the opening of the box.

[0025] The upper sides of the rear door 2 are hinged to the lower end of the sealing plate 9 by pins;

[0026] A hydraulic cylinder 7 is hinged to the sealing plate 9. The push rod end of the hydraulic cylinder 7 is hinged to the middle of the rear door 2 through a linkage mechanism. The extension and retraction of the hydraulic cylinder 7 controls the opening and closing of the rear door 2 through the linkage mechanism. Specifically, the linkage mechanism includes a first link 4, a second link 5, and a third link 6. A horizontally placed rotating shaft 3 is fixed in the middle of the rear door 2. One end of the first link 4 is hinged to the middle of the rotating shaft 3 through a pin, and the other end of the first link 4 is hinged to the lower end of the rear door 2 through a pin. One end of the second link 5 is hinged to the middle of the first link 4 through a pin, and the other end of the second link 5 is hinged to one end of the third link 6 through a pin. The other end of the third link 6 is hinged to the middle of the rear door 2 through a pin, and the middle of the third link 6 is hinged to the push rod end of the hydraulic cylinder 7 through a pin.

[0027] The outer perimeter of the enclosure opening is provided with an flared edge 8. The flared edge 8 increases the mating surface between the rear door 2 and the enclosure opening, improving the sealing performance.

[0028] Appendix Figure 1 The diagram shows the rear door 2 in the closed state. At this time, the hydraulic cylinder 7 extends, and the third link 6, the second link 5, and the first link 4 form a self-locking mechanism, which ensures that the rear door 2 is tightly attached to the vacuum truck body 1.

[0029] As attached Figure 2 The diagram shows the rear door 2 in the open state. The hydraulic cylinder 7 is retracted, and the rear door 2 is opened through the linkage mechanism. At this time, sewage discharge operation is carried out, which can discharge all sewage and sand and gravel from the bottom of the tank.

[0030] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A rear door structure for a vacuum truck, comprising a vacuum truck body and a rear door, characterized in that: The rear end of the vacuum truck body is provided with a semi-circular opening, and a sealing plate is fixed above the opening. The rear door is semi-circular and can completely cover the box opening; a sealing strip is provided at the joint surface between the rear door and the box opening. The upper two sides of the rear door are hinged to the lower end of the sealing plate by pins; A hydraulic cylinder is hinged to the sealing plate. The push rod end of the hydraulic cylinder is hinged to the middle of the rear door through a linkage mechanism. The extension and retraction of the hydraulic cylinder controls the opening and closing of the rear door through the linkage mechanism.

2. The rear door structure of a vacuum truck according to claim 1, characterized in that: The linkage mechanism includes a first link, a second link, and a third link; A horizontally positioned pivot is fixed in the middle of the rear door; One end of the first connecting rod is hinged to the middle of the rotating shaft via a pin, and the other end of the first connecting rod is hinged to the lower end of the rear door via a pin. One end of the second link is hinged to the middle of the first link by a pin, and the other end of the second link is hinged to one end of the third link by a pin. The other end of the third link is hinged to the middle of the rear door via a pin, and the middle of the third link is hinged to the push rod end of the hydraulic cylinder via a pin.

3. The rear door structure of a vacuum truck according to claim 1, characterized in that: The outer perimeter of the box opening is provided with an flared edge.

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