Vehicle rear door opening and closing structure

Abstract

The utility model relates to a vehicle rear door opening and closing structure which comprises a plurality of chain rear door opening and closing mechanisms. Each chain rear door opening and closing mechanism comprises a plurality of chains, a chain tension adjusting mechanism and a latch hook mechanism; the vehicle rear door opening and closing device can be arranged between the tail ends of vehicle left and right crossbeams and the tail end of a container and is used for opening and closing a vehicle rear door to improve the reliability of a vehicle rear door opening and closing structure.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle engineering machinery, in particular to a vehicle rear door opening and closing structure. Background Art

[0002] The opening and closing structure of the rear door of a traditional mining vehicle is mainly a single-chain structure. If the vehicle tonnage is large, the damage will be very serious. The reason is that the chain is subjected to large force. When the rear door is about to open, the single chain is prone to breakage and failure, and this structure has no chain tensioning adjustment structure. Utility Model Content

[0003] The utility model aims to provide a vehicle rear door opening and closing structure in view of the deficiencies in the prior art.

[0004] The utility model is realized by adopting the following technical solutions:

[0005] A vehicle rear door opening and closing structure comprises a plurality of chain rear door opening and closing mechanisms; each of the chain rear door opening and closing mechanisms comprises a plurality of chains, a chain tensioning adjustment mechanism and a locking hook mechanism;

[0006] The first ends of the chains are connected to the locking hook mechanism, and the second ends are detachably connected to the chain tensioning and adjusting mechanism.

[0007] Preferably, the chain tensioning adjustment mechanism comprises a left bracket, a right bracket, an adjustment bolt and an adjustment pin;

[0008] The first end of the adjusting bolt is fixed to the left bracket or the right bracket, and the second end is detachably connected to the hole at the second end of the chain through an adjusting pin.

[0009] Preferably, the first end of the adjusting bolt is a bolt rod, and the second end is a U-shaped seat;

[0010] The two walls of the U-shaped seat opening are coaxially provided with pin shaft holes matched with the adjusting pin shaft.

[0011] Preferably, the left bracket and the right bracket each include a first fixing plate and a second fixing plate perpendicular to the first fixing plate;

[0012] The first fixing plate and the second fixing plate are both provided with screw holes.

[0013] Preferably, the locking hook mechanism comprises a left hook, a right hook, a hook assembly, a locking hook pin and a chain baffle;

[0014] The left hook and the right hook are both provided with locking hook pins, and a hook assembly and a pin assembly are provided between the left hook and the right hook; a plurality of chain baffles are provided on the hook assembly and the pin assembly, and the hole sleeve of the first end of each chain is provided on the pin assembly and is limited by two chain baffles.

[0015] Preferably, the hook assembly includes a connecting circular tube; the connecting circular tube is connected to the left hook and the right hook respectively.

[0016] Preferably, the pin assembly includes a connecting pin and a sleeve sleeved on the connecting pin; the sleeve includes a sleeve 1 and a sleeve 2 arranged on both sides of the sleeve 1.

[0017] Preferably, the chain baffle includes a baffle and two mounting holes arranged on the baffle.

[0018] Preferably, a counterweight matrix tube is provided between the left hook and the right hook.

[0019] Compared with the prior art, the utility model has the following beneficial technical effects:

[0020] The utility model provides a plurality of chain rear door opening and closing mechanisms; each chain rear door opening and closing mechanism comprises a plurality of chains, a chain tensioning and adjusting mechanism and a locking hook mechanism; the chain rear door opening and closing mechanisms can be arranged between the rear ends of the left and right side beams of the vehicle and the rear end of the cargo box, and are used for opening and closing the rear door of the vehicle, thereby improving the reliability of the rear door opening and closing structure of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a side view of the overall structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the adjusting bolt of the utility model;

[0025] Figure 4 This is a schematic diagram of the right bracket structure of the utility model;

[0026] Figure 5 This is a schematic diagram of the lock hook mechanism structure of the utility model;

[0027] Figure 6 This is a schematic diagram of the counterweight rectangular tube structure of the utility model.

[0028] Description of reference numerals:

[0029] Left bracket; 2. Right bracket; 3. Adjusting bolt; 4. Adjusting pin; 5. Chain; 6. Pin assembly; 7. Hook assembly; 8. Hook pin; 9. Left hook; 10. Connecting round tube; 11. Chain baffle; 12. Sleeve one; 13. Sleeve two; 14. Counterweight rectangular tube; 15. Right hook; 21. First fixing plate; 22. Second fixing plate; 211. Screw hole; 31. Bolt rod; 32. U-shaped seat; 321. Pin hole. DETAILED DESCRIPTION

[0030] Example

[0031] like Figure 1-6 As shown: a vehicle rear door opening and closing structure, including a plurality of chain rear door opening and closing mechanisms; each of the chain rear door opening and closing mechanisms includes a plurality of chains 5; the chains 5, a chain tensioning adjustment mechanism and a locking hook mechanism;

[0032] The first ends of the chains 5 are connected to the locking hook mechanism, and the second ends are detachably connected to the chain tensioning and adjusting mechanism.

[0033] like Figure 1 , 2 As shown, the chain tensioning adjustment mechanism includes a left bracket 1, a right bracket 2, an adjustment bolt 3, and an adjustment pin 4;

[0034] The first end of the adjusting bolt 3 is fixed to the left bracket 1 or the right bracket 2 , and the second end is detachably connected to the hole at the second end of the chain 5 via the adjusting pin 4 .

[0035] like Figure 3 As shown, the first end of the adjusting bolt 3 is a bolt rod 31, and the second end is a U-shaped seat 32;

[0036] The two walls of the opening of the U-shaped seat 32 are coaxially provided with a pin hole 321 matched with the adjusting pin 4; the adjusting pin 4 passes through the pin hole 321 and the hole of the chain 5, and is fixed by a matching nut.

[0037] like Figure 2 , 4 As shown, the left bracket 1 and the right bracket 2 both include a first fixing plate 21 and a second fixing plate 22 perpendicular to the first fixing plate 21; preferably, the left bracket 1 and the right bracket 2 are welded parts;

[0038] Screw holes 211 are provided on the first fixing plate 21 and the second fixing plate 22; the several screw holes 211 of the first fixing plate 21 of the left bracket 1 and the right bracket 2 can be installed with corresponding bolts and nuts; the screw holes 211 on the second fixing plate 22 of the left bracket 1 and the right bracket 2 are fixed by adjusting bolts 3 and matching nuts.

[0039] like Figure 1 , 5As shown, the locking hook mechanism includes a left hook 9, a right hook 15, a hook assembly 7, a locking hook pin 8 and a chain baffle 11;

[0040] A locking hook pin 8 is provided on both the left hook 9 and the right hook 15, and a hook assembly 7 and a pin assembly 6 are provided between the left hook 9 and the right hook 15; a plurality of chain baffles 11 are provided on the hook assembly 7 and the pin assembly 6, and the hole sleeve of the first end of each chain 5 is provided on the pin assembly 6 and is limited by two chain baffles 11.

[0041] like Figure 5 As shown, the hook assembly 7 includes a connecting round tube 10; the connecting round tube 10 is connected to the left hook 9 and the right hook 15 respectively; the connecting round tube 10 and the left hook 9 and the right hook 15 can be connected by welding.

[0042] like Figure 5 As shown, the pin assembly 6 includes a connecting pin and a sleeve sleeved on the connecting pin; the sleeve includes a sleeve 12 and a sleeve 2 13 arranged on both sides of the sleeve 12; the sleeve 12 and the sleeve 2 13 are connected to the left hook 9, the right hook 15 and the corresponding chain baffle 11 by welding.

[0043] Preferably, the chain baffle 11 includes a baffle and two mounting holes arranged on the baffle; one mounting hole of the chain baffle 11 is used to be sleeved and fixed with the connecting round tube 10 of the hook assembly 7, and the other mounting hole is sleeved and fixed with the connecting pin of the pin assembly 6; the hole at the first end of the chain 5 is sleeved on the connecting pin of the pin assembly 6, and is limited by two chain baffles 11; preferably, the chain baffle 11 is a steel plate cut-shaped part, the number of chain baffles 11 is four, two in a group, the corresponding sleeve one 12 is arranged between the two groups of chain baffles 11, and the two sleeves two 13 are respectively arranged between the left hook 9 and the left chain baffle 11, and the right chain baffle 11 and the right hook 15.

[0044] like Figure 6 As shown, a counterweight matrix tube 14 is provided between the left hook 9 and the right hook 15 ; preferably, two ends of the counterweight matrix tube 14 are welded to the left hook 9 and the right hook 15 , respectively.

[0045] Working principle: Taking a large-tonnage mining vehicle as an example, two groups of chain rear door opening and closing mechanisms are symmetrically arranged between the tail ends of the left and right side beams of the vehicle and the tail end of the cargo box. Each group of chain rear door opening and closing mechanisms has two chains, and each chain rear door opening and closing mechanism has two chains. Among them, the left bracket 1 and the right bracket 2 of the chain tensioning adjustment mechanism are located on the inner and outer sides of the ventral surface of the tail end of the frame beam, and are bolted to the tail end of the frame beam. The locking hook mechanism is installed on the hook support at the tail end of the box bottom plate using a locking hook pin 8. The left hook 9 and the right hook 15 on the locking hook mechanism are in surface contact with the rear door. By pulling the chain 5, the locking hook mechanism is driven to deflect, and the rear door is opened or closed.

Claims

1. A vehicle rear door opening and closing structure, characterized in that: It comprises a plurality of chain rear door opening and closing mechanisms; each of the chain rear door opening and closing mechanisms comprises a plurality of chains (5), a chain tensioning and adjusting mechanism and a locking hook mechanism; The first ends of the plurality of chains (5) are connected to the locking hook mechanism, and the second ends are detachably connected to the chain tensioning and adjusting mechanism; The chain tensioning adjustment mechanism comprises a left bracket (1), a right bracket (2), an adjustment bolt (3) and an adjustment pin (4); The first end of the adjusting bolt (3) is fixed to the left bracket (1) or the right bracket (2), and the second end is detachably connected to the hole at the second end of the chain (5) via an adjusting pin (4); The locking hook mechanism comprises a left hook (9), a right hook (15), a hook assembly (7), a locking hook pin (8) and a chain baffle (11); The left hook (9) and the right hook (15) are both provided with a locking hook pin (8), and a hook assembly (7) and a pin assembly (6) are provided between the left hook (9) and the right hook (15); a plurality of chain baffles (11) are provided on the hook assembly (7) and the pin assembly (6), and a hole sleeve at the first end of each chain (5) is provided on the pin assembly (6) and is limited by two chain baffles (11).

2. The vehicle rear door opening and closing structure according to claim 1, characterized in that: The first end of the adjusting bolt (3) is a bolt rod (31), and the second end is a U-shaped seat (32); The two walls of the opening of the U-shaped seat (32) are coaxially provided with a pin shaft hole (321) matching with the adjustment pin shaft (4).

3. The vehicle rear door opening and closing structure according to claim 2, characterized in that: The left bracket (1) and the right bracket (2) both comprise a first fixing plate (21) and a second fixing plate (22) perpendicular to the first fixing plate (21); The first fixing plate (21) and the second fixing plate (22) are both provided with screw holes (211).

4. The vehicle rear door opening and closing structure according to claim 1, characterized in that: The hook assembly (7) comprises a connecting circular tube (10); the connecting circular tube (10) is respectively connected to the left hook (9) and the right hook (15).

5. The vehicle rear door opening and closing structure according to claim 4, characterized in that: The pin shaft assembly (6) comprises a connecting pin shaft and a sleeve sleeved on the connecting pin shaft; the sleeve comprises a sleeve first (12) and a sleeve second (13) arranged on both sides of the sleeve first (12).

6. The vehicle rear door opening and closing structure according to claim 5, characterized in that: The chain baffle (11) comprises a baffle and two mounting holes arranged on the baffle.

7. The vehicle rear door opening and closing structure according to claim 1, characterized in that: A counterweight rectangular tube (14) is arranged between the left hook (9) and the right hook (15).

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