Hatch cover with locking structure

Abstract

The invention discloses a hatch cover with a locking structure, and belongs to the technical field of ship tools, the hatch cover comprises a circular bottom plate, a cylinder is fixedly mounted on the circular bottom plate, by arranging four fan-shaped cover plates, the opening mode of a traditional hatch cover can be changed, and therefore the space needed for opening the hatch cover can be saved; through mutual cooperation of the transmission assembly and the position adjusting assembly, rapid adjustment of the position of the fan-shaped cover plate can be achieved, so that the fan-shaped cover plate rapidly covers the hatch, through arrangement of the limiting assembly, the position of the fan-shaped cover plate can be locked by limiting the rotating direction of the position adjusting lead screw, and therefore the hatch can be rapidly covered with the fan-shaped cover plate. And the overall structural strength of the hatch cover can be enhanced, so that the stability and safety of the hatch cover are guaranteed, the positions of the fan-shaped cover plates can be limited by arranging the limiting rods, and therefore relative movement between the fan-shaped cover plates is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of ship tools, and in particular to a hatch cover with a locking structure. Background Art

[0002] One of the main functions of the hatch cover is to ensure the watertightness of the hull and prevent water from entering the cargo hold, thereby protecting the cargo from being damaged by water. The locking structure can strengthen the fit between the hatch cover and the hatch enclosure, ensuring that the hatch cover can remain tightly closed under various sea conditions and effectively prevent seawater from seeping in. This is crucial for the safe navigation of the ship, especially in severe weather conditions, such as strong winds and waves. The locking structure can prevent the hatch cover from shifting or deforming, further ensuring the safety of the ship and cargo. The existing hatch covers have poor stability and are easily accidentally opened due to misoperation or external factors, thereby failing to ensure the safety of equipment and personnel. Therefore, the present invention provides a hatch cover with a locking structure. Summary of the invention

[0003] In view of the defects in the prior art, the present invention provides a hatch cover with a locking structure, which overcomes the problem that the existing hatch cover has poor stability and is easily accidentally opened due to misoperation or external factors, thereby failing to ensure the safety of equipment and personnel.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hatch cover with a locking structure, comprising a circular bottom plate, a cylinder is fixedly mounted on the circular bottom plate, an annular slide is movably arranged on the circular bottom plate, four fan-shaped cover plates are slidably mounted in a circular array on the annular slide plate, the fan-shaped cover plates are used to cover the cylinder, a transmission assembly is arranged on the annular slide plate, the transmission assembly is used to adjust the positions of the four fan-shaped cover plates, a positioning assembly is symmetrically arranged between the annular slide plate and the circular bottom plate, the positioning assembly includes a positioning screw rod rotatably mounted on the circular bottom plate, a mounting circular plate is symmetrically fixedly arranged on the annular slide plate, a transmission shaft is rotatably mounted on the mounting circular plate, the transmission shaft and the positioning screw rod constitute a spiral pair, a limiting assembly is arranged between the positioning screw rod and the circular bottom plate, the limiting assembly includes an outer limiting ratchet and an inner limiting ratchet, the outer limiting ratchet and the inner limiting ratchet are used to limit the rotation direction of the positioning screw rod.

[0005] Furthermore, auxiliary slides are symmetrically fixed on the annular slide, and the auxiliary slides are slidably matched with the circular bottom plate. The mounting circular plate and the auxiliary slides are spaced apart, and the two mounting circular plates and the two auxiliary slides are arranged in a circular array relative to the axis of the cylinder.

[0006] Furthermore, when the four fan-shaped cover plates are located at the closest positions to each other, a complete circular plate is formed, and the fan-shaped cover plates are provided with fan-shaped grooves, which are used to enable the fan-shaped cover plates and the cylinder to engage with each other. The transmission assembly includes an annular rotating plate rotatably mounted on the annular slide, and four arc-shaped groove plates are fixedly arranged in a circular array on the annular rotating plate. Transmission short columns are fixedly arranged on the fan-shaped cover plates, and the arc-shaped groove plates are movably connected to the corresponding transmission short columns.

[0007] Furthermore, auxiliary fan-shaped plates are movably arranged on the end of the fan-shaped cover plate closest to the axis of the cylinder, and a complete circular plate is formed when the four auxiliary fan-shaped plates are located at the closest positions to each other. Eight limit rods are fixedly arranged in a circular array on the circular bottom plate, and two limit holes cooperating with the limit rods are arranged on the fan-shaped cover plate. The limit rods and the limit holes are used to limit the position of the fan-shaped cover plate.

[0008] Furthermore, a driven gear is rotatably mounted on the transmission shaft, a torsion spring is arranged between the driven gear and the corresponding transmission shaft, a driven gear ring is fixedly mounted on the annular rotating plate, and the driven gears are meshed with the driven gear ring to form a gear pair, a transmission gear is fixedly mounted on the adjusting screw rod, a transmission gear ring is rotatably mounted on the circular bottom plate, and the transmission gears are formed with the transmission gear ring to form a gear pair.

[0009] Furthermore, there is friction between the transmission shaft and the corresponding adjustment screw rod, and the elastic force of the torsion spring between the driven gear and the corresponding transmission shaft is always greater than the friction between the transmission shaft and the corresponding adjustment screw rod.

[0010] Furthermore, the limit outer ratchet is fixedly mounted on the corresponding adjusting screw rod, and the limit inner ratchet is symmetrically fixed with a limit slide, the limit slides are slidably matched with the circular bottom plate, and a limit spring is arranged between the limit slide and the circular bottom plate, and a ratchet mechanism is formed when the limit outer ratchet and the limit inner ratchet are engaged.

[0011] Furthermore, an auxiliary circular plate is fixedly mounted on the positioning screw rod, and the limiting components also include an auxiliary ratchet rotatably mounted on the circular base plate, and auxiliary ratchets are evenly and fixedly arranged on half the circumference of the auxiliary circular plate. The auxiliary ratchets on the auxiliary circular plate form a ratchet mechanism when engaged with the corresponding auxiliary ratchets, and a pressing short rod is fixedly arranged on the limiting inner ratchet, and a pressing strip is fixedly arranged on the auxiliary ratchet, and the pressing strip is used to push the pressing short rod to move.

[0012] Furthermore, a circular cover plate 1 and a circular cover plate 2 are fixedly arranged on the circular base plate, and the circular cover plate 1 and the circular cover plate 2 are respectively used to protect the components on both sides of the circular base plate. The circular cover plate 1 and the circular cover plate 2 are both provided with a through hole equal to the inner diameter of the cylinder, and the through hole on the circular cover plate 1, the through hole on the circular cover plate 2, and the axis of the cylinder are on the same straight line.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) By providing four fan-shaped cover plates, the present invention can change the opening method of the traditional hatch cover, thereby saving the space required for opening the hatch cover. (2) By cooperating with the transmission assembly and the positioning assembly, the present invention can realize the rapid adjustment of the position of the fan-shaped cover plates, thereby realizing the fan-shaped cover plates to quickly cover the hatch. (3) By providing a limit assembly, the present invention can lock the position of the fan-shaped cover plates by limiting the rotation direction of the positioning screw rod, and can also enhance the overall structural strength of the hatch cover, thereby ensuring the stability and safety of the hatch cover. (4) By providing a limit rod, the present invention can limit the position of the fan-shaped cover plates, thereby preventing relative movement between the fan-shaped cover plates. (5) By providing an auxiliary fan plate, the present invention can manually lock the position of the fan-shaped cover plates, thereby further improving the stability of the hatch cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a cross-sectional view of the structure of the cylinder of the present invention.

[0016] Figure 3 It is a structural schematic diagram of the positioning motor of the present invention.

[0017] Figure 4 It is a schematic structural diagram of the transmission assembly of the present invention.

[0018] Figure 5 for Figure 4 A local enlarged schematic diagram of point A in the middle.

[0019] Figure 6 for Figure 4 A local enlarged schematic diagram of point B in the middle.

[0020] Figure 7 It is a top view of the structure of the annular slide plate of the present invention.

[0021] Figure 8 It is a structural schematic diagram of the auxiliary sector plate of the present invention.

[0022] Fig. 9 It is a schematic structural diagram of the limiting component of the present invention.

[0023] Fig.10 for Fig. 9 A partial enlarged schematic diagram of point C in the middle.

[0024] Fig.11 It is a top view of the limiting assembly of the present invention.

[0025] Reference numerals: 101-circular bottom plate; 102-cylinder; 103-circular cover plate 1; 104-circular cover plate 2; 105-annular slide plate; 106-sector cover plate; 107-transmission gear ring; 108-limiting rod; 109-limiting hole; 110-auxiliary sector plate; 111-transmission gear; 112-driven gear; 113-driven gear ring; 114-transmission shaft; 115-adjusting screw rod; 116-annular rotating plate ; 117-arc groove plate; 118-transmission short column; 119-fan-shaped handle; 120-fan-shaped groove; 121-auxiliary circular plate; 122-limit outer ratchet; 123-limit inner ratchet; 124-auxiliary ratchet; 125-pressing strip plate; 126-pressing short rod; 127-auxiliary ratchet; 128-limiting spring; 129-limiting slide plate; 130-mounting circular plate; 131-auxiliary slide plate; 132-positioning motor. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] Example: Reference Figure 1-Figure 11 A hatch cover with a locking structure comprises a circular bottom plate 101, a cylinder 102 is fixedly mounted on the circular bottom plate 101, an annular slide plate 105 is movably arranged on the circular bottom plate 101, four fan-shaped cover plates 106 are slidably mounted in a circular array on the annular slide plate 105, the fan-shaped cover plates 106 are used to cover the cylinder 102, and a complete circular plate is formed when the four fan-shaped cover plates 106 are located at the closest positions, and fan-shaped grooves 120 are provided on the fan-shaped cover plates 106, and the fan-shaped grooves 120 are used to engage the fan-shaped cover plates 106 and the cylinder 102, and when the four fan-shaped cover plates 106 are engaged with each other, the fan-shaped grooves 120 on the four fan-shaped cover plates 106 form an annular groove.

[0028] A transmission assembly is provided on the annular slide 105, and the transmission assembly is used to adjust the positions of the four fan-shaped cover plates 106. The transmission assembly includes an annular rotating plate 116 rotatably mounted on the annular slide 105, and four arc-shaped slot plates 117 are fixedly provided in a circular array on the annular rotating plate 116. Transmission short columns 118 are fixedly provided on the fan-shaped cover plates 106. The arc-shaped slot plates 117 are movably connected with the corresponding transmission short columns 118 to drive the annular rotating plate 116 to rotate, and the four arc-shaped slot plates 117 rotate synchronously. Under the action of the arc-shaped slot plates 117, the transmission short columns 118 move toward the direction close to the axis of the annular rotating plate 116, that is, the fan-shaped cover plate 106 moves toward the direction close to the axis of the annular rotating plate 116, and finally the four fan-shaped cover plates 106 move to the position closest to the axis of the annular rotating plate 116, and at this time, the four fan-shaped cover plates 106 form a complete annular plate.

[0029] Auxiliary fan-shaped plates 110 are movably provided on the end of the fan-shaped cover plate 106 closest to the axis of the cylinder 102. When the four auxiliary fan-shaped plates 110 are located at the closest positions to each other, a complete circular plate is formed. The auxiliary fan-shaped plates 110 are fixedly provided with fan-shaped handles 119. When the four auxiliary fan-shaped plates 110 are combined to form a circular plate, the four fan-shaped handles 119 are combined to form a circular handle. When the four fan-shaped cover plates 106 are combined to form a circular plate, the circular handle formed by the four fan-shaped handles 119 is manually rotated so that the auxiliary fan-shaped plates 110 are simultaneously combined with the two fan-shaped cover plates 106. That is, under the action of the auxiliary fan-shaped plates 110, the position of the fan-shaped cover plates 106 is locked.

[0030] A positioning assembly is symmetrically arranged between the annular slide 105 and the circular base plate 101, and the positioning assembly includes a positioning screw 115 rotatably mounted on the circular base plate 101. A mounting circular plate 130 is symmetrically fixedly arranged on the annular slide 105. Auxiliary slides 131 are also symmetrically fixedly arranged on the annular slide 105. The auxiliary slides 131 are slidably matched with the circular base plate 101. The mounting circular plate 130 and the auxiliary slides 131 are arranged at intervals, and the two mounting circular plates 130 and the two auxiliary slides 131 are arranged in a circular array relative to the axis of the cylinder 102.

[0031] A transmission shaft 114 is rotatably mounted on the mounting circular plate 130, and the transmission shaft 114 and the positioning screw 115 form a spiral pair. There is friction between the transmission shaft 114 and the corresponding positioning screw 115, and a driven gear 112 is rotatably mounted on the transmission shaft 114. A torsion spring is arranged between the driven gear 112 and the corresponding transmission shaft 114, one end of the torsion spring is fixedly connected to the driven gear 112, and the other end of the torsion spring is fixedly connected to the corresponding transmission shaft 114. The elastic force of the torsion spring between the driven gear 112 and the corresponding transmission shaft 114 is always greater than the friction between the transmission shaft 114 and the corresponding positioning screw 115, a driven gear ring 113 is fixedly mounted on the annular rotating plate 116, and the driven gears 112 are meshed with the driven gear ring 113 to form a gear pair, and a transmission gear 111 is fixedly mounted on the positioning screw 115, and a transmission gear ring 107 is rotatably mounted on the circular bottom plate 101, and the transmission gear 111 and the transmission gear ring 107 form a gear pair.

[0032] Eight limiting rods 108 are fixedly arranged in a circular array on the circular base plate 101 , and two limiting holes 109 cooperating with the limiting rods 108 are arranged on the fan-shaped cover plate 106 . The limiting rods 108 and the limiting holes 109 are used to limit the position of the fan-shaped cover plate 106 .

[0033] In the initial position, the four fan-shaped cover plates 106 are located at the farthest positions, and the annular slide plate 105 is located at the farthest position from the circular bottom plate 101. At this time, the limit rod 108 is engaged with the corresponding limit hole 109, and the torsion spring between the driven gear 112 and the transmission shaft 114 is not compressed.

[0034] Drive one of the two positioning screw rods 115 to rotate, and under the action of the transmission gear 111, the transmission gear ring 107 rotates, that is, the two transmission gears 111 rotate synchronously. Due to the friction between the transmission shaft 114 and the positioning screw rod 115 and the torsion spring provided between the driven gear 112 and the transmission shaft 114, the transmission gear 111, the driven gear 112, the transmission shaft 114, and the positioning screw rod 115 rotate synchronously, that is, the driven gear ring 113 rotates, and then the annular rotating plate 116 rotates. Under the action of the annular rotating plate 116, the four fan-shaped cover plates 106 move to the position closest to the axis of the annular rotating plate 116 and engage to form a complete circular plate. At this time, the limiting hole 109 on the fan-shaped cover plate 106 moves to the top of the corresponding limiting rod 108, and the limiting hole 109 moves to the top of the end face of the cylinder 102.

[0035] When the fan-shaped cover plate 106 moves to the position closest to the axis of the annular rotating plate 116, the annular rotating plate 116 cannot continue to rotate, that is, the driven gear ring 113 cannot continue to rotate, and then the driven gear 112 cannot continue to rotate. Since the elastic force of the torsion spring between the driven gear 112 and the corresponding transmission shaft 114 is always greater than the friction between the transmission shaft 114 and the corresponding adjustment screw 115, at this time, the adjustment screw 115 overcomes the friction between the transmission shaft 114 and the adjustment screw 115 and rotates relative to the transmission shaft 114, thereby causing the transmission shaft 114 to move in the direction close to the circular bottom plate 101. Under the action of the mounting circular plate 130, the annular slide plate 105 moves in the direction close to the circular bottom plate 101, and the auxiliary slide plate 131 slides relative to the circular bottom plate 101, which causes the fan-shaped cover plate 106 to move closer to the circular bottom plate 101. The cylinder 102 moves in the direction of the limit hole 109 on the fan-shaped cover plate 106 and the corresponding limit rod 108, and the fan-shaped groove 120 on the fan-shaped cover plate 106 is engaged with the end face of the cylinder 102, so that the annular slide plate 105 is finally moved to the position closest to the circular bottom plate 101. At this time, the annular groove formed by the four fan-shaped grooves 120 is completely engaged with the end face of the cylinder 102, that is, there is no gap between the fan-shaped cover plate 106 and the cylinder 102, that is, the sealing between the fan-shaped cover plate 106 and the cylinder 102 is achieved, and the adjusting screw 115 continues to rotate at this time. Since the annular slide plate 105 cannot continue to move, that is, the adjusting screw 115 cannot rotate relative to the transmission shaft 114, the transmission shaft 114 and the adjusting screw 115 rotate synchronously at this time, and the torsion spring between the transmission shaft 114 and the driven gear 112 is compressed.

[0036] The reverse drive adjustment screw 115 rotates, and the torsion spring between the driven gear 112 and the transmission shaft 114 is fully restored first. At this time, the limit rod 108 and the limit hole 109 are in an engaged state. That is, at this time, the fan-shaped cover plate 106 cannot move away from the axis of the annular rotating plate 116 under the action of the limit rod 108 and the limit hole 109. At this time, the driven gear 112 cannot rotate, and then the adjustment screw 115 overcomes the friction between the adjustment screw 115 and the transmission shaft 114. When the transmission shaft 114 rotates, the annular slide plate 105 moves away from the circular bottom plate 101, and finally the limiting rod 108 disengages from the limiting hole 109. At this time, the fan-shaped groove 120 disengages from the cylinder 102, and the adjusting screw 115 continues to rotate, and the transmission gear 111, the driven gear 112, the transmission shaft 114, and the adjusting screw 115 rotate synchronously, so that the four fan-shaped cover plates 106 move synchronously in the direction away from the axis of the annular rotating plate 116.

[0037] A limiting assembly is arranged between the positioning screw 115 and the circular base plate 101, and the limiting assembly includes an outer limiting ratchet 122 and an inner limiting ratchet 123. The outer limiting ratchet 122 and the inner limiting ratchet 123 are used to limit the rotation direction of the positioning screw 115. The outer limiting ratchet 122 is fixedly mounted on the corresponding positioning screw 115, and a limiting slide 129 is symmetrically fixedly arranged on the inner limiting ratchet 123. The limiting slides 129 are slidably matched with the circular base plate 101, and a limiting spring 128 is arranged between the limiting slide 129 and the circular base plate 101. When the outer limiting ratchet 122 and the inner limiting ratchet 123 are engaged, a ratchet mechanism is formed.

[0038] An auxiliary circular plate 121 is also fixedly mounted on the positioning screw rod 115, and the limiting components also include an auxiliary ratchet 124 rotatably mounted on the circular base plate 101, a torsion spring is arranged between the auxiliary ratchet 124 and the circular base plate 101, one end of the torsion spring is fixedly connected to the circular base plate 101, and the other end of the torsion spring is fixedly connected to the auxiliary ratchet 124, and auxiliary ratchet teeth 127 are evenly fixedly arranged on half of the circumference of the auxiliary circular plate 121, and the auxiliary ratchet teeth 127 on the auxiliary circular plate 121 form a ratchet mechanism when engaged with the corresponding auxiliary ratchet 124, a pressing short rod 126 is fixedly arranged on the limiting inner ratchet 123, and a pressing strip plate 125 is fixedly arranged on the auxiliary ratchet 124, and the pressing strip plate 125 is used to push the pressing short rod 126 to move.

[0039] In the initial position, the four fan-shaped cover plates 106 are located at the farthest positions, at which time the torsion spring between the auxiliary ratchet 124 and the circular base plate 101 is not compressed, and the end of the pressing strip 125 farthest from the axis of the auxiliary ratchet 124 is located at the farthest position from the corresponding auxiliary circular plate 121. At this time, the auxiliary ratchet teeth 127 on the auxiliary circular plate 121 are not in contact with the corresponding auxiliary ratchet 124, and the limit springs 128 are not compressed, that is, the limit inner ratchet 123 is not engaged with the corresponding limit outer ratchet 122.

[0040] The adjusting screw 115 is driven to rotate, and the four sector-shaped cover plates 106 are first connected to form a circular plate, and then the sector-shaped cover plates 106 are connected to the cylinder 102. At this time, the auxiliary ratchet teeth 127 on the auxiliary circular plate 121 do not contact the auxiliary ratchet wheel 124, and the adjusting screw 115 continues to rotate. The torsion spring between the driven gear 112 and the transmission shaft 114 is compressed, and the auxiliary ratchet teeth 127 are connected to the corresponding auxiliary ratchet wheel 124. Under the action of the auxiliary ratchet teeth 127, the auxiliary ratchet wheel 124 and the pressing strip plate 125 rotate synchronously, and the torsion spring between the auxiliary ratchet wheel 124 and the circular bottom plate 101 is compressed, so that the pressing strip plate 125 and the corresponding pressing short rod 126 are pressed. Contact, under the action of the pressing strip 125, the pressing short rod 126 moves towards the direction close to the circular bottom plate 101, that is, the limiting inner ratchet 123 moves towards the direction close to the circular bottom plate 101, and the limiting spring 128 is compressed, that is, the limiting outer ratchet 122 engages with the limiting inner ratchet 123 during the rotation to form a ratchet mechanism, and finally, under the action of the pressing strip 125 and the pressing short rod 126, the limiting outer ratchet 122 and the limiting inner ratchet 123 are fully engaged, under the action of the limiting outer ratchet 122 and the limiting inner ratchet 123, the limiting outer ratchet 122 cannot rotate in the opposite direction at this time, that is, the position of the fan-shaped cover plate 106 is locked.

[0041] When it is necessary to contact and lock the position of the fan-shaped cover plate 106, continue to drive the adjusting screw 115 to rotate, so that the outer limiting ratchet 122 continues to rotate relative to the inner limiting ratchet 123, and the pressing strip 125 disengages from pressing the short pressing rod 126, so that the inner limiting ratchet 123 contacts the restriction on the rotation direction of the outer limiting ratchet 122, that is, contacts the restriction on the rotation direction of the adjusting screw 115, and the adjusting screw 115 continues to rotate, and finally the pressing strip 125 rotates to the initial position. At this time, driving the adjusting screw 115 to rotate in the opposite direction can make the fan-shaped cover plate 106 return to the initial position.

[0042] A circular cover plate 103 and a circular cover plate 104 are fixedly arranged on the circular base plate 101. The circular cover plate 103 and the circular cover plate 104 are respectively used to protect the components on both sides of the circular base plate 101. The circular cover plate 103 and the circular cover plate 104 are both provided with through holes equal to the inner diameter of the cylinder 102. The through holes on the circular cover plate 103, the through holes on the circular cover plate 104 and the axis of the cylinder 102 are on the same straight line. A positioning motor 132 is fixedly installed on the circular cover plate 103, and the output shaft of the positioning motor 132 is connected to the corresponding positioning screw 115.

[0043] Working principle: Start the positioning motor 132 to drive the corresponding positioning screw 115 to rotate. Under the action of the transmission gear 111, the driven gear 112, the driven gear ring 113, the transmission shaft 114 and the positioning screw 115, the four fan-shaped cover plates 106 are first joined to form a complete circular plate, that is, a complete hatch cover plate. Then the annular slide plate 105 is moved toward the direction close to the circular bottom plate 101, so that the fan-shaped grooves 120 on the fan-shaped cover plates 106 are all engaged with the cylinder 102, so that the hatch cover plate formed by the fan-shaped cover plates 106 is engaged with the cylinder 102. At this time, the limiting rod 108 is engaged with the limiting hole 109. Under the action of the limiting rod 108 and the limiting hole 109, the fan-shaped cover plate 106 cannot move away from the annular rotating plate 1 16 axis moves in the direction of the adjustment screw 115, the adjustment screw 115 continues to rotate, the torsion spring between the driven gear 112 and the transmission shaft 114 is compressed, and under the action of the auxiliary circular plate 121, the auxiliary ratchet 124, the pressing strip 125, and the pressing short rod 126, the limiting inner ratchet 123 engages with the limiting outer ratchet 122, that is, limiting the rotation direction of the adjustment screw 115, that is, realizing the locking of the position of the adjustment screw 115, and then realizing the locking of the position of the fan-shaped cover plate 106, and then the circular handle formed by the four fan-shaped handles 119 can be manually rotated to make the circular plate formed by the four auxiliary fan-shaped plates 110 rotate, that is, the auxiliary fan-shaped plate 110 is engaged with the two fan-shaped cover plates 106 at the same time, thereby realizing the locking of the position of the fan-shaped cover plate 106 again.

[0044] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by technicians in the relevant technical field based on the above-mentioned conception without creative work all fall within the protection scope of the present invention.

Claims

1. A hatch cover with a locking structure, comprising a circular bottom plate (101) on which a cylinder (102) is fixedly mounted, characterized in that: An annular slide plate (105) is movably arranged on the circular bottom plate (101), and four fan-shaped cover plates (106) are slidably mounted in a circular array on the annular slide plate (105). The fan-shaped cover plates (106) are used to cover the cylinder (102). A transmission assembly is arranged on the annular slide plate (105), and the transmission assembly is used to adjust the positions of the four fan-shaped cover plates (106). Position adjustment assemblies are symmetrically arranged between the annular slide plate (105) and the circular bottom plate (101), and the position adjustment assemblies each include a position adjustment wire rotatably mounted on the circular bottom plate (101). The rod (115) and the annular slide plate (105) are symmetrically fixedly provided with a mounting circular plate (130), and a transmission shaft (114) is rotatably mounted on the mounting circular plate (130). The transmission shaft (114) and the positioning screw rod (115) form a spiral pair. A limiting assembly is provided between the positioning screw rod (115) and the circular bottom plate (101). The limiting assembly includes a limiting outer ratchet (122) and a limiting inner ratchet (123). The limiting outer ratchet (122) and the limiting inner ratchet (123) are used to limit the rotation direction of the positioning screw rod (115).

2. A hatch cover with a locking structure according to claim 1, characterized in that: Auxiliary slides (131) are symmetrically fixedly arranged on the annular slide plate (105), and the auxiliary slides (131) are slidably matched with the circular bottom plate (101). The mounting circular plate (130) and the auxiliary slides (131) are arranged at intervals, and the two mounting circular plates (130) and the two auxiliary slides (131) are arranged in a circular array relative to the axis of the cylinder (102).

3. The hatch cover with a locking structure according to claim 2, characterized in that: When the four fan-shaped cover plates (106) are located at the closest positions to each other, a complete circular plate is formed. The fan-shaped cover plates (106) are each provided with a fan-shaped groove (120), and the fan-shaped groove (120) is used to enable the fan-shaped cover plates (106) to engage with the cylinder (102). The transmission assembly comprises an annular rotating plate (116) rotatably mounted on the annular slide plate (105), and four arc-shaped groove plates (117) are fixedly arranged in a circumferential array on the annular rotating plate (116). The fan-shaped cover plates (106) are each fixedly provided with a transmission short column (118), and the arc-shaped groove plates (117) are movably connected to the corresponding transmission short columns (118).

4. The hatch cover with a locking structure according to claim 3, characterized in that: An auxiliary fan-shaped plate (110) is movably arranged on the end of the fan-shaped cover plate (106) closest to the axis of the cylinder (102); when the four auxiliary fan-shaped plates (110) are located at the closest positions, a complete circular plate is formed; eight limiting rods (108) are fixedly arranged in a circular array on the circular bottom plate (101); two limiting holes (109) cooperating with the limiting rods (108) are arranged on the fan-shaped cover plate (106); the limiting rods (108) and the limiting holes (109) are used to limit the position of the fan-shaped cover plate (106).

5. The hatch cover with a locking structure according to claim 4, characterized in that: A driven gear (112) is rotatably mounted on the transmission shaft (114), a torsion spring is provided between the driven gear (112) and the corresponding transmission shaft (114), a driven gear ring (113) is fixedly mounted on the annular rotating plate (116), the driven gears (112) mesh with the driven gear ring (113) to form a gear pair, a transmission gear (111) is fixedly mounted on the adjustment screw rod (115), a transmission gear ring (107) is rotatably mounted on the circular bottom plate (101), the transmission gears (111) and the transmission gear ring (107) form a gear pair.

6. The hatch cover with a locking structure according to claim 5, characterized in that: There is friction between the transmission shaft (114) and the corresponding adjustment screw rod (115), and the elastic force of the torsion spring between the driven gear (112) and the corresponding transmission shaft (114) is always greater than the friction between the transmission shaft (114) and the corresponding adjustment screw rod (115).

7. The hatch cover with a locking structure according to claim 6, characterized in that: The position-limiting outer ratchet (122) is fixedly mounted on the corresponding position-adjusting screw rod (115); a position-limiting slide plate (129) is symmetrically fixedly arranged on the position-limiting inner ratchet (123); the position-limiting slide plates (129) are slidably matched with the circular bottom plate (101); a position-limiting spring (128) is arranged between the position-limiting slide plates (129) and the circular bottom plate (101); and a ratchet mechanism is formed when the position-limiting outer ratchet (122) and the position-limiting inner ratchet (123) are engaged.

8. The hatch cover with a locking structure according to claim 7, characterized in that: An auxiliary circular plate (121) is also fixedly mounted on the position adjustment screw rod (115), and the position limiting components also include an auxiliary ratchet (124) rotatably mounted on the circular bottom plate (101), auxiliary ratchets (127) are evenly and fixedly arranged on half of the circumference of the auxiliary circular plate (121), and a ratchet mechanism is formed when the auxiliary ratchets (127) on the auxiliary circular plate (121) and the corresponding auxiliary ratchets (124) are engaged, a short pressing rod (126) is fixedly arranged on the position limiting inner ratchet (123), and a pressing strip (125) is fixedly arranged on the auxiliary ratchet (124), and the pressing strip (125) is used to push the short pressing rod (126) to move.

9. The hatch cover with a locking structure according to claim 8, characterized in that: A circular cover plate 1 (103) and a circular cover plate 2 (104) are fixedly arranged on the circular bottom plate (101); the circular cover plate 1 (103) and the circular cover plate 2 (104) are respectively used to protect the components on both sides of the circular bottom plate (101); the circular cover plate 1 (103) and the circular cover plate 2 (104) are both provided with through holes having the same inner diameter as the cylinder (102); the through holes on the circular cover plate 1 (103), the through holes on the circular cover plate 2 (104), and the axis of the cylinder (102) are on the same straight line.

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