Single-point control four-point linkage type safety door structure

Abstract

The invention relates to a single-point control four-point linkage type safety door structure which comprises a linkage device, a safety door frame, a safety door cover, a handle, a limiting block and a limiting block. The handle is fixed on the safety door cover, the limiting blocks are fixed on four sides of the safety door cover and used for accurately positioning the safety door cover during installation, the linkage device is installed on the safety door cover, and the linkage device is contacted with the limiting blocks on the safety door frame to lock the safety door. The linkage device is mainly composed of a lock pin, a pin shaft, a linkage plate, a handle seat, a pull ring, a fixing device body, a fixing seat, a mandrel and a sliding seat. By adding the locking points, the sealing strip can be compressed at each distance, various adverse factors such as dust, rainwater and shock waves outside a vehicle which influence the safety of facilities and passengers in the vehicle are isolated, all the locking points are linked, all the locking points can act together by operating independent parts, the complexity of multiple operations is solved, and the safety of the vehicle is improved. And meanwhile, the actions of the locking points are synchronized.

Description

Technical Field

[0001] The invention belongs to the field of tank and armored vehicle safety doors, and in particular relates to a single-point controlled four-point linkage safety door structure. Background Art

[0002] The safety door of a tank armored vehicle is usually arranged at the bottom of the vehicle body, close to the crew position. When encountering danger and unable to escape from the top driver's window, the crew can achieve emergency escape through the safety door under the vehicle. The general structure of the safety door is a three-point limit and double-point clamping structure. The safety door is arranged on the bottom deck of the vehicle. A limit seat is welded on the safety door. There is a pressure plate on each side. The pressure plate is fixed to the threaded attachment by bolts. The above three-point limiting measures can fix the safety door. When the bolts fixing the pressure plate are unscrewed using a wrench or other tool, the safety door can be automatically dropped. A handle is installed on the safety door. After the safety door falls, the safety door can be lifted up by the handle and fixed with a pressure plate.

[0003] The safety door can be opened by using a wrench. Since there are two pressure plates, two rotation operations are required. In addition, the tightening and fixing method of the bolt determines that multiple rotations are required to completely unscrew the bolt from the attachment, which is time-consuming and labor-intensive. In a tight battlefield, it will undoubtedly increase the escape time. When no physical trauma occurs, the crew's fear will be increased, and they will be in a hurry and easily cause operational errors. At the same time, when the vehicle is attacked by bottom explosives such as landmines, the point-type bolt structure obviously cannot meet the protection needs, causing damage to the crew. The point-type clamping structure will lead to poor sealing at the position away from the point clamping point. After fixing one point, it is impossible to achieve synchronous clamping by fixing another point. There is an inconsistency in the compression amount of the rubber strip, which causes water and soil to enter the vehicle. At the same time, when the bottom of the vehicle is attacked by explosives such as landmines, the explosion shock wave will also take the opportunity to enter the vehicle, causing damage to the crew. Summary of the Invention

[0004] The purpose of the present invention is to provide a safety door structure for tanks and armored vehicles that can be quickly operated, has good sealing performance and high protection performance. By increasing the locking points, the sealing strip can be compressed at each distance, thereby isolating the dust, rain, shock waves and other adverse factors outside the vehicle that affect the facilities inside the vehicle and the safety of the occupants. The locking points are linked, and all the locking points can be operated together by operating a separate part, thereby solving the tedious multiple operations. At the same time, the actions of the locking points are also synchronized, and the synchronized actions also ensure the uniformity of the compression of the sealing strip. The bolt fixing structure is changed to a thick cylindrical limiting structure, thereby ensuring that the safety door structure remains intact under mine explosion, protecting the safety of the occupants and meeting the occupants' escape requirements.

[0005] In order to solve the above technical problems, the present invention provides a single-point controlled four-point linkage safety door structure, which is characterized by comprising a linkage device 1, a safety door frame 2, a safety door cover 3, a handle 4, a limiting block 5, and a limit block 7;

[0006] The handle 4 is fixed on the safety door cover 3, and limiting blocks 5 are fixed on the four sides of the safety door cover 3 for accurate positioning of the safety door cover 3 during installation. The linkage device 1 is installed on the safety door cover 3, and the linkage device 1 contacts the limiting blocks 7 on the safety door frame 2 to lock the safety door.

[0007] The linkage device mainly consists of a lock pin 9, a pin shaft 10, a linkage plate 11, a handle seat 15, a pull ring 17, a fixer body 18, a fixed seat 22, a spindle 23, and a sliding seat 24;

[0008] The fixed seat 22 and the spindle 23 are fixed at the center of the safety door cover 3, and the sliding seats 24 are evenly distributed around the safety door cover 3;

[0009] A lock pin 9 is slidably connected to each sliding seat 24. The end of the lock pin 9 close to the center of the safety door cover 3 is hinged to one end of a linkage plate 11, and the other end of the linkage plate 11 is hinged to the handle seat 15; the handle seat 15 is sleeved on the spindle 23 and can rotate around the spindle 23. The fixer body 18 is screwed into the threaded hole of the handle seat 15. At this time, the fixing pin 16 can be inserted into the fixing seat 22. By lifting the pull ring 17 a certain distance and then rotating it, the fixing pin 16 can be disengaged from the inner hole of the fixing seat 22.

[0010] Beneficial effects: The present invention increases the number of locking points to achieve compression of the sealing strip at each distance, thereby isolating the dust, rain, shock waves and other adverse factors outside the vehicle that affect the facilities and occupant safety in the vehicle. The locking points are linked, and all locking points can be operated together by operating a separate part, which solves the tediousness of multiple operations. At the same time, the actions of the locking points are also synchronized, and the synchronized actions also ensure the uniformity of the compression of the sealing strip. The bolt fixing structure is changed to a thick cylindrical limiting structure to ensure that the safety door structure remains intact under mine explosion, protecting the safety of the occupants and meeting the occupants' escape requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the sliding seat structure;

[0012] Figure 2 It is a schematic diagram of the structure of the present invention;

[0013] Figure 3 This is a cross-sectional view of the safety door structure;

[0014] Figure 4 It is a structural diagram of the linkage device;

[0015] Figure 5 Schematic diagram of the structure of the fixture body;

[0016] Figure 6 A schematic diagram of a cross slot provided on the upper end of the fixing body 18;

[0017] Figure 7 Schematic diagram of the handle structure;

[0018] Figure 8 Schematic diagram of the lock pin structure. DETAILED DESCRIPTION

[0019] In order to make the purpose, content and advantages of the present invention more clear, the specific embodiments of the present invention are further described in detail below.

[0020] The present invention proposes a single-point controlled four-point linkage safety door structure, which is arranged on the bottom deck of the vehicle body and mainly includes a linkage device 1, a safety door frame 2, a safety door cover 3, a handle 4, a limit block 5, a sealing gasket 6, and a limit block 7;

[0021] Figure 3 It is a cross-sectional view of the safety door structure, which shows the position of the sealing gasket 6. The sealing gasket 6 is bonded to the circumference of the safety door cover 3 and is sealed with the safety door frame 2 by extrusion. The safety door frame is welded to the bottom deck 8, and the handle 4 is welded to the safety door cover 3. The safety door cover 3 and its associated mechanisms can be lifted by the handle 4. The limiting block 5 is welded to the safety door cover 3, and one is welded on each of the four sides for accurate positioning of the safety door cover 3 during installation to prevent the center of the safety door cover 3 from not coinciding with the center of the safety door frame 2, thereby reducing the occupant's adjustment of the safety door cover 3. The linkage device 1 is installed on the safety door cover 3. By operation, the linkage device 1 can be brought into contact with the limiting block 7 to achieve safety door locking. The specific implementation of the linkage device is shown in FIG. Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 shown.

[0022] according to Figure 4 The linkage device shown is mainly composed of a lock pin 9, a pin shaft 10, a linkage plate 11, a washer 12, a cotter pin 13, a pin shaft 14, a handle seat 15, a fixing pin 16, a pull ring 17, a fixer body 18, a nut 19, a brake pad 20, a spring 21, a fixing seat 22, a spindle 23, a sliding seat 24, and a bolt 25.

[0023] Weld the fixed seat 22, the spindle 23, and the sliding seat 24 to the safety door cover 3. The fixed seat 22 and the spindle 23 are fixed at the center of the safety door cover 3, and the sliding seats 24 are evenly distributed around the safety door cover 3.

[0024] A lock pin 9 is slidably connected to each sliding seat 24. The end of the lock pin 9 close to the center of the safety door cover 3 is hinged to one end of a linkage plate 11, and the other end of the linkage plate 11 is hinged to the handle seat 15; the handle seat 15 is sleeved on the spindle 23 and can rotate around the spindle 23. The fixer body 18 is screwed into the threaded hole of the handle seat 15. At this time, the fixing pin 16 can be inserted into the fixing seat 22. By lifting the pull ring 17 a certain distance and then rotating it, the fixing pin 16 can be disengaged from the inner hole of the fixing seat 22.

[0025] A bolt 25 is provided above each sliding seat 24 for oil injection. The locking pin 9 is inserted into the hole of the sliding seat 24. One end of the pin shaft 10 is a smooth axis and the other end is threaded. The threaded end is fixed to the locking pin 9. The smooth axis at the other end connects one end of the linkage plate 11 to the locking pin 9. The linkage plate 11 can rotate around the smooth axis portion of the pin shaft 10. The handle seat 15 is sleeved on the spindle 23 and can rotate around the spindle 23. The other end of the linkage plate 11 is connected to the smooth hole distributed on the handle seat 15 through the pin shaft 14. A washer 12 is added to the bottom of the pin shaft 14 just inserted, and a cotter pin 13 is inserted to prevent loosening.

[0026] Insert the spring 21 and the fixing pin 16 into the hole of the fixing body 18, and insert the nut 19 and the brake washer 20 into the external thread of the fixing body 18. Insert the pull ring 17 into the fixing pin 16, and screw the newly assembled fixing body 18 into the threaded hole of the handle base 15. At this time, the fixing pin 16 can be inserted into the fixing base 22. By lifting the pull ring 17 a certain distance and then rotating it, the fixing pin 16 can be disengaged from the inner hole of the fixing base 22. The specific implementation method of connecting the fixing body 18 and its related parts to the handle base 15 is shown in FIG. Figure 5 shown.

[0027] according to Figure 5 The outer portion of the fixing body 18 is provided with an external thread, and the handle base 15 is provided with an internal thread. The fixing body 18 can be screwed into the handle base 15 through the thread, and the fixing body 18 is prevented from loosening by the nut 19 and the brake washer 20. The pull ring 17 is connected to the fixing pin 16. Under the action of the spring 21, the fixing pin 16 drives the pull ring 17 to move downward. Due to the limitation of the groove on the fixing body 18, it cannot move further downward, ensuring that the pull ring 17 is reliably fixed on the fixing body 18. The specific implementation method of the fixing body 18 to achieve this function is shown in FIG. Figure 6 shown.

[0028] according to Figure 6 The upper end of the fixing body 18 is provided with a cross groove, one deep and one shallow. The pull ring 17 is rotated by pulling over the upper end of the fixing body 18 and can be placed in the deep groove or the shallow groove, so as to realize that the fixing pin 16 is separated from the circular hole of the fixing seat 22 or enters the circular hole of the fixing seat 22. Entering the circular hole can realize that the handle seat 15 cannot rotate. The specific implementation method of the handle seat 15 is shown in FIG. Figure 7 shown.

[0029] according to Figure 7 The handle seat 15 shown has a hexagonal head protrusion on the upper end, and the hexagonal head can be rotated with a tool. There are four light holes and one threaded hole distributed on the circumference of the handle seat 15. The four light holes are used to connect with the linkage plate 11, and the one threaded hole is used to be threadedly fixed with the fixture body 18. By rotating the handle seat 15, the linkage plate 11 can be driven, and the linkage plate 11 drives the lock pin 10 to move linearly along the sliding seat 24. The specific implementation method of the lock pin 10 is shown in FIG. Figure 8 shown.

[0030] according to Figure 8 The lock pin 10 is cylindrical as a whole, which is convenient for sliding and also enhances the connection strength of the safety door lock. One end of the lock pin 10 is a two-stage slope structure. One stage is a large-angle slope structure, which is convenient for quickly contacting the limit block 7 and performing preliminary locking. The other stage is a small-angle slope structure to reinforce the final locking. The other end of the lock pin 10 is a slotted structure connected to the linkage plate 11. The lock pin 10 moves linearly along the sliding seat 24. The specific implementation method of the sliding seat 24 is shown in FIG. Figure 1 shown.

[0031] according to Figure 1 The interior of the sliding seat 24 shown is a double circular hole structure. The circular hole with a small diameter is used to cooperate with the locking pin 10, and the circular hole with a large diameter is used to store grease to lubricate the locking pin 10. A threaded hole is provided on its upper part. The bolt 25 at the threaded position is unscrewed and grease can be added through the threaded hole to ensure the smooth sliding of the locking pin 10.

[0032] Key points of the present invention

[0033] 1. The limiting block of the present invention is fixed on the door cover of the safety door and is used for accurate positioning of the door cover of the safety door. The linkage device is installed on the door cover of the safety door.

[0034] 2. The locking pins, sliding seat, linkage plate and corresponding connecting parts on the linkage device are distributed in diagonal positions. By rotating the handle seat with a rotation angle of no more than 50°, the synchronous locking or release of the locking pins at all four locations can be achieved.

[0035] 3. The fixing pin can be inserted into the fixing seat 22 to restrict the handle seat to prevent it from rotating during driving, causing the safety door to open.

[0036] 4. The locking pin has a two-stage slope structure, which ensures that the locking pin can easily contact the limit block in the early stage and can be locked in the later stage. The sliding seat has a double-hole structure, which increases the grease placement area.

[0037] 5. The cross section of the locking pin in the linkage device is not limited to a circle, and can be any shape of cross section structure that can move linearly.

[0038] 6. The linkage device is not limited to four-point linkage, and can be any multi-point linkage structure.

[0039] The present invention provides a safety door structure that can be operated quickly, has good sealing performance and high protection performance. Single-point operation ensures that the occupants can quickly escape when in danger. The thick cylindrical structure of the lock pin can still be operated when it is hit by bottom explosives such as landmines. The synchronous action of multiple points ensures the uniformity of compression of the sealing strip, ensures the sealing reliability, maintains the cleanliness and tidiness of the vehicle environment, and also eliminates the possibility of shock waves after bottom explosion entering the vehicle.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A single-point controlled four-point linkage safety door structure, characterized by: It includes a linkage device 1, a safety door frame 2, a safety door cover 3, a handle 4, a limiting block 5, and a limiting block 7; The handle 4 is fixed on the safety door cover 3, and limiting blocks 5 are fixed on the four sides of the safety door cover 3 for accurate positioning of the safety door cover 3 during installation. The linkage device 1 is installed on the safety door cover 3, and the linkage device 1 contacts the limiting blocks 7 on the safety door frame 2 to lock the safety door.

2. A single-point controlled four-point linkage safety door structure according to claim 1, characterized in that: Arranged on the bottom deck of the vehicle body.

3. The single-point controlled four-point linkage safety door structure according to claim 1, characterized in that: A sealing gasket is provided around the safety door cover 3, and the sealing gasket and the safety door frame 2 are sealed by extrusion.

4. The single-point controlled four-point linkage safety door structure according to claim 1, characterized in that: The safety door frame is welded to the bottom deck 8.

5. The single-point controlled four-point linkage safety door structure according to claim 1, characterized in that: The linkage device mainly consists of a lock pin 9, a pin shaft 10, a linkage plate 11, a handle seat 15, a pull ring 17, a fixer body 18, a fixed seat 22, a spindle 23, and a sliding seat 24; The fixed seat 22 and the spindle 23 are fixed at the center of the safety door cover 3, and the sliding seats 24 are evenly distributed around the safety door cover 3; A lock pin 9 is slidably connected to each sliding seat 24. The end of the lock pin 9 close to the center of the safety door cover 3 is hinged to one end of a linkage plate 11, and the other end of the linkage plate 11 is hinged to the handle seat 15; the handle seat 15 is sleeved on the spindle 23 and can rotate around the spindle 23. The fixer body 18 is screwed into the threaded hole of the handle seat 15. At this time, the fixing pin 16 can be inserted into the fixing seat 22. By lifting the pull ring 17 a certain distance and then rotating it, the fixing pin 16 can be disengaged from the inner hole of the fixing seat 22.

6. The single-point controlled four-point linkage safety door structure according to claim 5, characterized in that: A bolt 25 is provided above each sliding seat 24 for oil injection.

7. The single-point controlled four-point linkage safety door structure according to claim 6, characterized in that: The locking pin 9 is inserted into the hole of the sliding seat 24. One end of the pin shaft 10 is an optical axis and the other end is threaded. The threaded end is fixed to the locking pin 9, and the optical axis at the other end connects one end of the linkage plate 11 to the locking pin 9. The linkage plate 11 can rotate around the optical axis part of the pin shaft 10.

8. The single-point controlled four-point linkage safety door structure according to claim 7, characterized in that: The handle base 15 is sleeved on the spindle 23 and can rotate around the spindle 23 , and the other end of the linkage plate 11 is connected to the light holes distributed on the handle base 15 through the pin 14 .

9. The single-point controlled four-point linkage safety door structure according to claim 8, characterized in that: Insert the spring 21 and the fixing pin 16 into the hole of the fixer body 18, insert the pull ring 17 onto the fixing pin 16, and screw the newly assembled fixer body 18 into the threaded hole of the handle base 15. At this time, the fixing pin 16 can be inserted into the fixing base 22. By lifting the pull ring 17 a certain distance and then rotating it, the fixing pin 16 can be disengaged from the inner hole of the fixing base 22.

10. The single-point controlled four-point linkage safety door structure according to claim 5, characterized in that: The outside of the fixture body 18 is provided with an external thread, and the handle base 15 is provided with an internal thread. The fixture body 18 is screwed into the handle base 15 through the thread, and the pull ring 17 is connected to the fixing pin 16. Under the action of the spring 21, the fixing pin 16 drives the pull ring 17 to move downward; the upper end of the fixture body 18 is provided with a cross groove, one deep and one shallow. The pull ring 17 is rotated by pulling up and passing over the upper end of the fixture body 18, and can be placed in the deep groove or the shallow groove, so that the fixing pin 16 can be separated from the circular hole of the fixing base 22 or enter the circular hole of the fixing base 22.

Images