Tank car ladder stand capable of being telescopically fixed

Abstract

The utility model discloses a tank car ladder stand capable of being telescopically fixed, which relates to the technical field of tank car ladder stands and comprises two groups of support frames and a mounting frame, a plurality of groups of cross rods are connected between the two groups of support frames, and the mounting frame is mounted at the tops of the support frames. When the tank car crawling ladder capable of being telescopically fixed is used, a rotating rod can be rotated, the rotating rod can drive a transmission rod to rotate through a first bevel gear set, the transmission rod can drive a lead screw to rotate through a second bevel gear set while rotating, and meanwhile the lead screw can drive a connecting block to slide under the guiding effect of the connecting block when rotating; the connecting block drives the wedge-shaped block to move, meanwhile, the wedge-shaped block does not extrude the clamping block at the top, then the clamping block can be shrunk into a sliding block groove through the movable spring, the clamping block is not in butt joint with the limiting block, and at the moment, the sliding frame can stretch out and draw back along a sliding groove in one side of the supporting frame; therefore, the length of the whole crawling ladder can be adjusted, and different use requirements of users are met.

Description

Technical Field

[0001] The utility model relates to the technical field of tank truck ladders, in particular to a retractable and fixed tank truck ladder. Background Art

[0002] Tank truck ladders usually refer to ladders used for going up and down tank trucks (such as vehicles transporting liquids, gases and other substances). Therefore, tank truck ladders are important auxiliary tools in tank truck operations, and their safety and reliability are directly related to the personal safety of operators.

[0003] When using current tank truck ladders, in order to prevent the entire ladder from shaking during use, the ladder is installed on the outside of the tank truck by bolts, and the entire ladder is an integrated formed structure installed on the outside of the tank truck. This results in the size of the entire ladder being fixed, and the length of the ladder cannot be extended or retracted according to usage requirements, thereby failing to meet the usage needs of different groups of people. Utility Model Content

[0004] The purpose of the utility model is to provide a retractable and fixed tank truck ladder to solve the problem in the above background art that the existing tank truck ladder is inconvenient to retract the length of the ladder.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a retractable fixed tank truck ladder, comprising a support frame and a mounting frame, wherein two sets of support frames are connected with multiple sets of cross bars, and the mounting frame is mounted on the top of the support frame;

[0006] One side of the support frame is connected to a sliding block through a sliding groove, and the sliding block is connected to a sliding frame on the side away from the support frame. Multiple groups of fixed rods are connected between the two groups of sliding frames, and a rotating rod is connected through one side of the fixed rod at the bottom. The middle of the rotating rod is connected to a first bevel gear set, and a transmission rod is connected between the middle of the first bevel gear set and the groove of the fixed rod. Both ends of the transmission rod are connected to a second bevel gear set, and a screw rod is connected between the middle of the second bevel gear set and the groove of the sliding frame.

[0007] Preferably, a threaded sleeve is sleeved on the outer side of the screw rod, a connecting block is connected to one side of the threaded sleeve, and a wedge block is installed on the top of the connecting block.

[0008] Preferably, a clamping block is provided on the top of the wedge-shaped block, and a movable spring is connected between the clamping block and the groove of the sliding block.

[0009] Preferably, a limiting block is provided between one end of the clamping block away from the wedge-shaped block and the sliding groove of the support frame.

[0010] Preferably, one side of the cross bar and the fixed bar is connected to a movable plate via a rotating shaft, and the bottom of the movable plate is connected to a connecting rod via a rotating shaft.

[0011] Preferably, one end of the connecting rod away from the movable plate is connected to a movable block via a rotating shaft, and a telescopic spring is provided between the movable block and the groove of the support frame.

[0012] Preferably, a support block is provided on one side of the cross bar and the fixed bar, and the support block is installed on the inner side of the two groups of support frames and the two groups of sliding frames.

[0013] Compared with the prior art, the beneficial effect of the present invention is that when the retractable and fixed tank truck ladder is in use, the rotating rod can be rotated, and the rotating rod will drive the transmission rod to rotate through the first bevel gear set. When the transmission rod rotates, it will drive the screw rod to rotate through the second bevel gear set. At the same time, when the screw rod rotates, it will be guided by the connecting block, which will drive the connecting block to slide, so that the connecting block drives the wedge block to move. At the same time, the wedge block will not squeeze the top block, and then the block will be retracted into the sliding block groove through the movable spring, so that the block will not dock with the limit block. At this time, the sliding frame can be retracted and retracted along the slide groove on one side of the support frame, so that the length of the entire ladder can be adjusted to meet the different usage needs of users. This is the usage feature of the retractable and fixed tank truck ladder.

[0014] 1. The retractable and fixed tank truck ladder can be used by rotating the rotating rod. The rotating rod will drive the second bevel gear set to rotate through the first bevel gear set and the transmission rod. The rotation of the second bevel gear set will drive the screw rod to rotate. Under the cooperation of the screw rod and the screw sleeve, the connecting block will drive the wedge block to move downward. Then, the wedge block will no longer squeeze the card block, and the card block will be retracted into the groove of the sliding block by the movable spring, so that the sliding block can normally drive the sliding frame to slide along the slide groove of the support frame, making it convenient to extend and retract the entire ladder.

[0015] 2. When stepping on the cross bar of the retractable fixed tank truck ladder, the movable plate on one side will rotate under the action of gravity. At the same time, the rotation of the movable plate will push the movable block downward through the rotating shaft and the connecting rod. When the movable plate rotates to a position flush with the cross bar, the support block can support the movable plate, thereby ensuring the stability of the movable plate. The supporting area of ​​the cross bar can be increased through the movable plate, making the climber more stable during the climbing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of a top view of a cross-sectional structure of the support frame of the present invention;

[0018] Figure 3 This is a schematic diagram of the main cutaway structure of the sliding block of the utility model;

[0019] Figure 4 This is a schematic diagram of the main cross-sectional structure of the support frame of the utility model;

[0020] Figure 5 This is a schematic diagram of the left side cross-section structure of the support frame of the present invention;

[0021] Figure 6 This is a schematic diagram of the main structure of the crossbar of the utility model;

[0022] Figure 7 This is a schematic diagram of the left side structure of the sliding block of the utility model.

[0023] In the figure: 1. support frame; 2. cross bar; 3. mounting frame; 4. sliding block; 5. sliding frame; 6. fixed rod; 7. rotating rod; 8. first bevel gear set; 9. transmission rod; 10. second bevel gear set; 11. screw rod; 12. screw sleeve; 13. connecting block; 14. wedge block; 15. clamping block; 16. movable spring; 17. limit block; 18. movable plate; 19. connecting rod; 20. movable block; 21. telescopic spring; 22. support block. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1 The utility model provides a technical solution: a retractable fixed tank truck ladder, comprising a support frame 1 and a mounting frame 3, multiple groups of cross bars 2 are connected between two groups of support frames 1, and the mounting frame 3 is installed on the top of the support frame 1;

[0026] The cam 12 is provided with a plurality of springs, and the springs 13 are connected to the drive means 11 and the drive means 12 are connected to the drive means 13.

[0027] During specific implementation, the retractable and fixed tank truck ladder can rotate the rotating rod 7 on one side of the fixed rod 6 when the ladder needs to be retracted. The rotating rod 7 is connected to the transmission rod 9 through the first bevel gear set 8. The first bevel gear set 8 is composed of two bevel gears meshing with each other, one bevel gear is connected to the rotating rod 7, and the other bevel gear is connected to the transmission rod 9. Therefore, the rotation of the rotating rod 7 will drive the transmission rod 9 to rotate through the first bevel gear set 8. Both sides of the transmission rod 9 are connected to the screw rod 11 inside the sliding frame 5 through the second bevel gear set 10. The second bevel gear set 10 is also composed of two bevel gears meshing with each other, one bevel gear is connected to the transmission rod 9, and the other bevel gear is connected to the screw rod 11. The rotation of the transmission rod 9 will drive the two sets of screw rods 11 to rotate. The outer side is sleeved with a screw sleeve 12, and one side of the screw sleeve 12 is connected to a connecting block 13. Under the guiding effect of the connecting block 13, when the screw rod 11 rotates, it drives the connecting block 13 downward through the screw sleeve 12, and at the same time drives the wedge block 14 on the top to move downward. At this time, the wedge block 14 does not squeeze the block 15 in the groove of the sliding block 4, and then the block 15 will be reset by the movable spring 16 and retracted into the groove of the sliding block 4, and separated from the limit block 17 in the slide groove of the support frame 1. Without the docking of the block 15 and the limit block 17, the sliding block 4 can slide along the slide groove on one side of the support frame 1, and drive the sliding frame 5 to slide downward along the support frame 1, so that the entire sliding frame 5 can be pulled downward from one side of the support frame 1, which is convenient for the user to retract the sliding frame 5;

[0028] On the contrary, when the sliding frame 5 needs to be fixed, it is only necessary to rotate the rotating rod 7 in the opposite direction, so that the rotating rod 7 drives the second bevel gear set 10 and the screw rod 11 to rotate in the opposite direction through the first bevel gear set 8 and the transmission rod 9, so that the screw sleeve 12 drives the wedge block 14 to move upward through the connecting block 13. The ends of the wedge block 14 and the clamping block 15 that are close to each other are both inclined structures. Therefore, when the wedge block 14 moves upward, it will squeeze the clamping block 15 through the inclined surface, so that the clamping block 15 can be squeezed out of the groove of the sliding block 4 and dock with the limit block 17 in the slide groove of the support frame 1. The position of the sliding frame 5 can be fixed by the clamping block 15 and the limit block 17, thereby ensuring the stability of the entire sliding frame 5.

[0029] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 7 It can be seen that when in use, the rotating rod 7 can be rotated according to the use requirements, and with the cooperation of the first bevel gear group 8, the transmission rod 9, the second bevel gear group 10, the screw rod 11 and the screw sleeve 12, the clamping block 15 is retracted into the groove of the sliding block 4, and then the sliding block 4 can be slid along the slide groove on one side of the support frame 1, so that the ladder can be extended and retracted to meet the different use requirements of users.

[0030] One side of the cross bar 2 and the fixed rod 6 is connected to a movable plate 18 through a rotating shaft, the bottom of the movable plate 18 is connected to a connecting rod 19 through a rotating shaft, and the end of the connecting rod 19 away from the movable plate 18 is connected to a movable block 20 through a rotating shaft. A telescopic spring 21 is provided between the movable block 20 and the groove of the support frame 1, and a support block 22 is provided on one side of the cross bar 2 and the fixed rod 6. The support block 22 is installed on the inner side of the two groups of support frames 1 and the two groups of sliding frames 5. The movable plate 18 forms a rotating structure between the rotating shaft and the fixed rod 6.

[0031] In a specific implementation, the retractable fixed tank truck ladder can be climbed by stepping on the cross bar 2. Since the movable plate 18 is connected to the cross bar 2 through a rotating shaft, and the movable plate 18 is in an inclined state, when stepping on the cross bar 2, the movable plate 18 is flipped downward by the action of gravity. Since the bottom of the movable plate 18 is connected to the connecting rod 19 through a rotating shaft, and the other end of the connecting rod 19 is connected to the movable block 20 through a rotating shaft, the movable plate 18 will push the connecting rod 19 to move during the downward rotation process, so that the connecting rod 19 pushes the movable block 20 to move downward, and the other end of the movable block 20 is slidably connected to the support frame through a slide groove. Similarly, when climbing the fixed rod 6 on one side of the sliding frame 5, the movable plate 18 will also rotate open to increase the support area of ​​the climber's feet.

[0032] On the contrary, when the cross bar 2 is not subjected to the pressure of the climber, the telescopic spring 21 will reset and push the movable plate 18 to move through the movable block 20 and the connecting rod 19. Since the movable plate 18 is connected to the cross bar 2 through the rotating shaft, the movable plate 18 rotates in the opposite direction. When the movable plate 18 rotates upward, the usable space of the ladder can be reduced, so that the climber will not be affected when climbing.

[0033] See Figure 1 、 Figure 5 、 Figure 6 and Figure 7 It can be seen that when in use, when the climber steps on the cross bar 2, the movable plate 18 will be rotated open by gravity, and the rotating plate will be supported by the support block 22. The movable plate 18 can increase the support area of ​​the cross bar 2, thereby ensuring the stability of the climber.

[0034] To sum up, when the retractable fixed tank truck ladder is in use, the mounting frame 3 on the top of the support frame 1 can be fixedly connected to the tank truck by bolts, and the side of the support frame 1 can also be fixed to the tank truck by bolts. When climbing is needed, the rotating rod 7 can be rotated, and with the cooperation of the first bevel gear set 8, the transmission rod 9, the second bevel gear set 10, the screw rod 11 and the screw sleeve 12, the clamping block 15 is separated from the limit block 17, and then the sliding frame 5 can be slid downward, so that the user can climb up along the fixed rod 6 in the middle of the sliding frame 5, and finally climb to the cross bar 2 in the middle of the support frame 1. It is convenient to climb to the top of the tank truck through the cross bar 2, which is convenient for cleaning and inspection of the interior of the tank truck. This is the use feature of the retractable fixed tank truck ladder. The content not described in detail in this description belongs to the existing technology known to professional and technical personnel in this field.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A retractable and fixed tank truck ladder, comprising a support frame (1) and a mounting frame (3), characterized in that: Multiple groups of cross bars (2) are connected between the two groups of support frames (1), and the mounting frame (3) is mounted on the top of the support frame (1); One side of the support frame (1) is connected to a sliding block (4) through a sliding groove, and the side of the sliding block (4) away from the support frame (1) is connected to a sliding frame (5), and multiple groups of fixed rods (6) are connected between the two groups of sliding frames (5), and a rotating rod (7) is connected through one side of the bottom fixed rod (6), and the middle of the rotating rod (7) is connected to a first bevel gear group (8), and a transmission rod (9) is connected between the middle of the first bevel gear group (8) and the groove of the fixed rod (6), and both ends of the transmission rod (9) are connected to a second bevel gear group (10), and a screw rod (11) is connected between the middle of the second bevel gear group (10) and the groove of the sliding frame (5).

2. The retractable fixed tank truck ladder according to claim 1, characterized in that: The outer side of the screw rod (11) is sleeved with a threaded sleeve (12), one side of the threaded sleeve (12) is connected to a connecting block (13), and a wedge block (14) is installed on the top of the connecting block (13).

3. The retractable fixed tank truck ladder according to claim 2, characterized in that: A clamping block (15) is provided on the top of the wedge block (14), and a movable spring (16) is connected between the clamping block (15) and the groove of the sliding block (4).

4. The retractable fixed tank truck ladder according to claim 3, characterized in that: A limiting block (17) is provided between one end of the clamping block (15) away from the wedge block (14) and the sliding groove of the support frame (1).

5. The retractable fixed tank truck ladder according to claim 1, characterized in that: One side of the cross bar (2) and the fixed bar (6) is connected to a movable plate (18) via a rotating shaft, and the bottom of the movable plate (18) is connected to a connecting rod (19) via a rotating shaft.

6. The retractable fixed tank truck ladder according to claim 5, characterized in that: One end of the connecting rod (19) away from the movable plate (18) is connected to a movable block (20) via a rotating shaft, and a telescopic spring (21) is provided between the movable block (20) and the groove of the support frame (1).

7. The retractable fixed tank truck ladder according to claim 1, characterized in that: A support block (22) is provided on one side of the cross bar (2) and the fixed bar (6), and the support block (22) is installed on the inner side of the two groups of support frames (1) and the two groups of sliding frames (5).

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