Ladder special for loading and unloading vehicle

Abstract

The invention relates to the field of unloading equipment, in particular to a special ladder for a loader. The ladder comprises a ladder body, a supporting base is assembled at the bottom end of the ladder body, sleeves are slidably connected to the two ends of the bottom end of the ladder body, rectangular supporting rods are rotatably connected into the sleeves, U-shaped limiting blocks are fixed to the two ends of the top end of the supporting base, and the ends, away from the sleeves, of the rectangular supporting rods are slidably connected with the inner sides of the U-shaped limiting blocks; the two rectangular supporting rods are rotationally connected in a crossed mode, and a lifting mechanism used for driving the two rectangular supporting rods to rotate in a crossed mode is arranged at the bottom end of the ladder body. According to the special ladder for the loading and unloading vehicle, the lifting mechanism drives the two rectangular supporting rods to rotate in a crossed mode, the lifting mechanism drives the top ends of the two rectangular supporting rods to rotate in the direction close to or away from each other, and therefore the two rectangular supporting rods drive the ladder body and the supporting base to stretch out and draw back; therefore, adjustment is performed according to the height of the vehicle loading-unloading flat plate.

Description

Technical Field

[0001] The invention relates to the field of unloading equipment, in particular to a special ladder for loading and unloading vehicles. Background Art

[0002] Every day, a large amount of equipment, materials, and supplies need to be transported to the production site via long-trailer flatbed trucks inside and outside the workshop. When loading equipment and materials, crane operators are required to get on and off the vehicles. In the past, loading and unloading personnel usually climbed onto the vehicles using the accessories around the trailers. When getting off, they often jumped directly from the trailers. Although the height of the trailer is not too high at 1.4 meters, there is still a risk of falling and sprains when getting on and off.

[0003] When using the above technology, we found the following technical problems in the prior art: By understanding that the vehicles currently used for barge transportation in the workshop are mainly fixed at two heights, the existing ladder is not convenient to adjust according to the height of the vehicle loading and unloading platform. The ladder cannot take into account the height of the vehicle loading and unloading platform used, thereby reducing the practicality of the ladder. For this reason, we designed a special ladder for loading and unloading vehicles to provide another technical solution to the above technical problems. Summary of the invention

[0004] Based on this, it is necessary to provide a special ladder for loading and unloading vehicles to address the above-mentioned technical problems. When in use, the two rectangular support rods are driven by the lifting mechanism to rotate crosswise with each other, so that the lifting mechanism drives the top ends of the two rectangular support rods to rotate in the direction of approaching or moving away from each other, and then the bottom ends of the two rectangular support rods rotate synchronously, so that the two rectangular support rods drive the ladder body and the support base to extend and retract, and the lifting mechanism can effectively adjust the height of the vehicle loading and unloading platform, which is conducive to the practicality and convenience of the lifting device.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A special ladder for loading and unloading vehicles comprises a ladder body, the bottom end of the ladder body is equipped with a supporting base, both ends of the bottom end of the ladder body are slidably connected with a sleeve, the inside of the sleeve is rotatably connected with a rectangular support rod, both ends of the top end of the support base are fixed with U-shaped limit blocks, one end of the rectangular support rod away from the sleeve is slidably connected to the inner side of the U-shaped limit block, the two rectangular support rods are cross-rotatably connected, and the bottom end of the ladder body is provided with a lifting mechanism for driving the two rectangular support rods to cross-rotate.

[0006] As a preferred embodiment of the special ladder for loading and unloading vehicles provided by the present invention, the lifting mechanism includes a fixed block one, a fixed block two, a transmission rod, a threaded rod and a limit assembly, and the two ends of the bottom end of the ladder body are fixed with a fixed block one, and the two ends in the middle of the lower end of the ladder body are fixed with a fixed block two, and guide rods are fixed on both sides between the fixed block one and the fixed block two at both ends, and the outer side of the guide rod is slidably connected with the sleeve.

[0007] As a preferred embodiment of the special ladder for loading and unloading vehicles provided by the present invention, the fixed block one and the fixed block two are internally rotatably connected with a transmission rod, both ends of the outer side of the transmission rod are fixed with threaded rods, and the outer side of the threaded rod is threadedly connected to the sleeve.

[0008] As a preferred embodiment of the special ladder for loading and unloading vehicles provided by the present invention, the rotation directions of the two threaded rods are opposite.

[0009] As a preferred embodiment of the special ladder for loading and unloading vehicles provided by the present invention, the limiting assembly includes a ratchet and a pawl, one end of the transmission rod passes through a fixed block 1 and is fixed with a ratchet, one end of one of the fixed blocks 1 is rotatably connected with a pawl, and the bottom end of the pawl is clamped with the ratchet.

[0010] As a preferred embodiment of the special ladder for loading and unloading vehicles provided by the present invention, guide and limiting mechanisms for positioning between the support base and the ladder body are arranged on both sides of the bottom end of the ladder body, and the guide and limiting mechanisms include a support block, a slider, an L-shaped frame and a rectangular positioning block. Sliders are fixed on both sides of the bottom end of the ladder body, and support blocks are fixed on both sides of the top end of the support base, and the interior of the support block is slidably connected to the slider.

[0011] As a preferred embodiment of the special ladder for loading and unloading vehicles provided by the present invention, a plurality of rectangular grooves are provided inside the sliding block, and a guide groove is provided at the top end inside the supporting block.

[0012] As a preferred embodiment of the special ladder for loading and unloading vehicles provided by the present invention, an L-shaped frame is fixed on one side of the support block, and the bottom end inside the L-shaped frame is slidably connected with a connecting rod, one end of the connecting rod is fixed with a hand barrel, and the other end of the connecting rod is fixed with a rectangular positioning block, and one end of the rectangular positioning block passes through a guide groove and is slidably connected with a corresponding rectangular groove.

[0013] As a preferred embodiment of the special ladder for loading and unloading vehicles provided by the present invention, an L-shaped mounting rod is fixed to one end of the bottom end of the ladder body, and rollers are installed on both sides of the L-shaped mounting rod.

[0014] As a preferred embodiment of the special ladder for loading and unloading vehicles provided by the present invention, anti-slip pads are fixed to the four ends of the bottom end of the support base, and handrails are installed on both sides of one end of the ladder body.

[0015] It can be seen without a doubt that the above-mentioned technical solution of the present application can definitely solve the technical problem to be solved by the present application.

[0016] At the same time, through the above technical solutions, the present invention has at least the following beneficial effects: The present invention provides a special ladder for loading and unloading vehicles: 1. The transmission rod and the threaded rod are driven to rotate by the ratchet, so that the threaded rod drives the two sleeves to reciprocate along the guide rod, and the two sleeves drive the two rectangular support rods to rotate crosswise, so that the two rectangular support rods drive the ladder body to adjust according to the height of the vehicle loading and unloading flatbed, thereby improving the practicality of the device and promoting the loading and unloading efficiency of goods; 2. When the ladder body is adjusted according to the height of the loading and unloading plate, the ladder body drives the slider and the support block to slide to the specified height, and then the sliding hand tube drives the rectangular positioning block to pass through the guide groove and the corresponding rectangular groove for clamping, thereby further improving the supporting strength of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure between the ladder body and the support base of the present invention; Figure 3 It is a structural schematic diagram of the lifting mechanism of the present invention; Figure 4 It is a schematic diagram of the structure between the transmission rod and the threaded rod of the present invention; Figure 5 This is a schematic diagram of the connection structure between the sleeve and the threaded rod of the present invention; Figure 6 It is a schematic diagram of the ratchet and pawl engagement structure of the present invention; Figure 7 This is a schematic diagram of the connection structure between the support block and the slider of the present invention; Figure 8 It is a schematic diagram of the internal structure of the support block of the present invention.

[0019] In the figure: 1. ladder body; 2. fixing block 1; 3. fixing block 2; 4. transmission rod; 5. threaded rod; 6. guide rod; 7. rectangular support rod; 8. support base; 9. ratchet; 10. pawl; 11. U-shaped limit block; 12. sleeve; 13. support block; 14. slider; 15. L-shaped frame; 16. rectangular positioning block; 17. rectangular groove; 18. hand pull tube; 19. handrail; 20. L-shaped mounting rod; 21. roller. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] As mentioned in the background art, it is known that the vehicles currently used for transporting in the workshop are mainly fixed at two heights. Therefore, the existing ladder is not convenient to adjust according to the height of the vehicle loading and unloading platform. The ladder cannot take into account the height of the vehicle loading and unloading platform used, thereby reducing the practicality of the ladder.

[0022] In order to solve this technical problem, the present invention provides a special ladder for loading and unloading vehicles.

[0023] Specifically, please refer to Figure 1-Figure 8 , a special ladder for loading and unloading vehicles specifically includes: A ladder body 1, the bottom end of the ladder body 1 is equipped with a support base 8, both ends of the bottom end of the ladder body 1 are slidably connected with a sleeve 12, the inner rotation of the sleeve 12 is connected with a rectangular support rod 7, both ends of the top of the support base 8 are fixed with a U-shaped limit block 11, one end of the rectangular support rod 7 away from the sleeve 12 is slidably connected to the inner side of the U-shaped limit block 11, the two rectangular support rods 7 are cross-rotatably connected, and the bottom end of the ladder body 1 is provided with a lifting mechanism for driving the two rectangular support rods 7 to cross-rotate.

[0024] The present invention provides a special ladder for loading and unloading vehicles. When in use, the lifting mechanism drives the two rectangular support rods 7 to rotate crosswise with each other, so that the lifting mechanism drives the top ends of the two rectangular support rods 7 to rotate in a direction close to or away from each other, and then the bottom ends of the two rectangular support rods 7 rotate synchronously, so that the two rectangular support rods 7 drive the ladder body 1 and the support base 8 to extend and retract, and the lifting mechanism can effectively adjust the height of the vehicle loading and unloading platform, which is beneficial to the practicality and convenience of the lifting device.

[0025] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] Embodiment 1 Reference Figure 1-Figure 6 A special ladder for loading and unloading vehicles, comprising a ladder body 1, the bottom end of the ladder body 1 is equipped with a support base 8, both ends of the bottom end of the ladder body 1 are slidably connected with sleeves 12, the inner rotation of the sleeve 12 is connected with a rectangular support rod 7, both ends of the top of the support base 8 are fixed with U-shaped limit blocks 11, one end of the rectangular support rod 7 away from the sleeve 12 is slidably connected to the inner side of the U-shaped limit block 11, the two rectangular support rods 7 are cross-rotatably connected, and the bottom end of the ladder body 1 is provided with a lifting mechanism for driving the two rectangular support rods 7 to cross-rotate; Specifically, when it is necessary to unload equipment, materials and supplies on the vehicle loading and unloading platform, since the climbing ladder of the prior art cannot be adjusted according to the height of the vehicle loading and unloading platform, it is not convenient to quickly load and unload the goods on the vehicle loading and unloading platform, and then the two rectangular support rods 7 are driven by the lifting mechanism to rotate crosswise with each other, so that the lifting mechanism drives the top ends of the two rectangular support rods 7 to rotate in the direction of approaching or moving away from each other, and then the bottom ends of the two rectangular support rods 7 rotate synchronously, so that the two rectangular support rods 7 drive the ladder body 1 and the support base 8 to extend and retract, and the lifting mechanism is effectively adjusted according to the height of the vehicle loading and unloading platform, which is conducive to the practicality and convenience of the lifting device; The lifting mechanism includes a fixed block 1 2, a fixed block 2 3, a transmission rod 4, a threaded rod 5 and a limit assembly. The two ends of the bottom end of the ladder body 1 are fixed with fixed blocks 1 2, and the two ends of the middle of the lower end of the ladder body 1 are fixed with fixed blocks 2 3. Guide rods 6 are fixed on both sides between the two ends of the fixed block 1 2 and the fixed block 2 3. The outer side of the guide rod 6 is slidably connected with the sleeve 12. The fixed block 1 2 and the fixed block 2 3 are internally rotatably connected with the transmission rod 4. The two ends of the outer side of the transmission rod 4 are fixed with threaded rods 5. The outer side of the threaded rod 5 is threadedly connected with the sleeve 12, and the rotation directions of the two threaded rods 5 are opposite. When it is necessary to adjust the height of the loading and unloading platform according to the vehicle, the rotating transmission rod 4 drives the threaded rod 5 to rotate, and the rotation directions of the two threaded rods 5 are opposite, so that the two threaded rods 5 drive the two sleeves 12 to move away from or close to each other. Therefore, the threaded rod 5 effectively drives the sleeve 12 to reciprocate along the direction of the guide rod 6, so that the sleeves 12 at both ends drive the top ends of the two rectangular support rods 7 to move synchronously, so that the two rectangular support rods 7 rotate crosswise, effectively adjusting the height of the loading and unloading platform according to the vehicle, greatly improving the practicality of the device and greatly increasing the loading and unloading efficiency of goods. The limit assembly includes a ratchet 9 and a pawl 10. One end of the transmission rod 4 passes through a fixed block 2 and is fixed with the ratchet 9. One end of one of the fixed blocks 2 is rotatably connected with the pawl 10, and the bottom end of the pawl 10 is engaged with the ratchet 9. When the ladder body 1 is adjusted to a height suitable for the current vehicle loading and unloading platform, the ratchet wheel 9 and the transmission rod 4 are clamped and limited by the pawl 10, thereby improving the stability of the device.

[0029] Embodiment 2 Reference Figure 7 and Figure 8 A special ladder for loading and unloading vehicles, both sides of the bottom end of the ladder body 1 are provided with a guide limit mechanism for positioning between the support base 8 and the ladder body 1, the guide limit mechanism includes a support block 13, a slider 14, an L-shaped frame 15 and a rectangular positioning block 16, both sides of the bottom end of the ladder body 1 are fixed with sliders 14, both sides of the top end of the support base 8 are fixed with support blocks 13, and the interior of the support block 13 is slidably connected with the slider 14; When the two rectangular support rods 7 rotate crosswise to drive the ladder body 1 to move up and down, the ladder body 1 drives the slider 14 and the support block 13 to slide, so as to improve the stability of the ladder body 1 during lifting and down, and avoid tilting during lifting and down; A plurality of rectangular grooves 17 are provided inside the slider 14, a guide groove is provided at the top of the support block 13, an L-shaped frame 15 is fixed to one side of the support block 13, a connecting rod is slidably connected to the bottom end of the L-shaped frame 15, a hand pull cylinder 18 is fixed to one end of the connecting rod, a rectangular positioning block 16 is fixed to the other end of the connecting rod, and one end of the rectangular positioning block 16 passes through the guide groove and is slidably connected to the corresponding rectangular groove 17; When the two rectangular support rods 7 drive the ladder body 1 to adjust to the specified height, the ladder body 1 drives the slider 14 and the support block 13 to slide to the corresponding position, and then drives the rectangular positioning block 16 through the guide groove and the corresponding rectangular groove 17 by sliding the hand pull tube 18 to further improve the supporting strength of the device. Because the weight of the staff and goods needs to be borne on the ladder body 1, the rectangular positioning block 16 limits the slider 14 at this time, which is convenient for improving the stability of the device and preventing injuries to personnel; An L-shaped mounting rod 20 is fixed to one end of the bottom of the ladder body 1, and rollers 21 are installed on both sides of the L-shaped mounting rod 20. When the device needs to be moved, the ladder body 1 is held and tilted in the direction of the L-shaped mounting rod 20, so that the rollers 21 are in contact with the ground, and then the supporting base 8 is separated from the ground, thereby effectively moving the device; The four ends of the bottom of the support base 8 are all fixed with anti-skid pads, and both sides of one end of the ladder body 1 are equipped with handrails 19.

[0030] The use process of the special ladder for loading and unloading vehicles provided by the present invention is as follows: Working principle: when it is necessary to adjust the height of the loading and unloading platform according to the vehicle, the transmission rod 4 and the threaded rod 5 are rotated by the ratchet 9, so that the threaded rod 5 drives the two sleeves 12 to move away from or close to each other, and the sleeve 12 reciprocates along the direction of the guide rod 6, so that the sleeves 12 at both ends drive the top ends of the two rectangular support rods 7 to move synchronously, so that the two rectangular support rods 7 rotate crosswise, when the rotation direction of the two rectangular support rods 7 is close to vertical, the rectangular support rods 7 drive the ladder body 1 to rise, and when the two rectangular support rods 7 rotate close to horizontal, the rectangular support rods 7 drive the ladder body 1 to descend, so that the ladder body 1 and the support base 8 are contracted, so that the two rectangular support rods 7 drive the ladder body 1 to effectively adjust the height of the loading and unloading platform according to the vehicle; When the two rectangular support rods 7 drive the ladder body 1 to adjust to the specified height, the ladder body 1 drives the slider 14 and the support block 13 to slide to the corresponding positions, and then drives the rectangular positioning block 16 through the guide groove and the corresponding rectangular groove 17 through the sliding hand tube 18 to engage with each other, thereby further improving the supporting strength of the device.

[0031] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A special ladder for loading and unloading vehicles, characterized in that: The invention comprises a ladder body (1), wherein the bottom end of the ladder body (1) is equipped with a support base (8), both ends of the bottom end of the ladder body (1) are slidably connected with sleeves (12), the inside of the sleeve (12) is rotatably connected with a rectangular support rod (7), both ends of the top end of the support base (8) are fixed with U-shaped limit blocks (11), one end of the rectangular support rod (7) away from the sleeve (12) is slidably connected to the inner side of the U-shaped limit block (11), the two rectangular support rods (7) are cross-rotatably connected, and the bottom end of the ladder body (1) is provided with a lifting mechanism for driving the two rectangular support rods (7) to cross-rotate.

2. A special ladder for loading and unloading vehicles according to claim 1, characterized in that: The lifting mechanism comprises a fixing block 1 (2), a fixing block 2 (3), a transmission rod (4), a threaded rod (5) and a limit assembly. The two ends of the bottom end of the ladder body (1) are fixed with the fixing block 1 (2), the two ends of the middle of the lower end of the ladder body (1) are fixed with the fixing block 2 (3), and the two sides between the fixing block 1 (2) and the fixing block 2 (3) at the two ends are fixed with guide rods (6), and the outer side of the guide rod (6) is slidably connected with the sleeve (12).

3. A special ladder for loading and unloading vehicles according to claim 2, characterized in that: The fixing block 1 (2) and the fixing block 2 (3) are rotatably connected to a transmission rod (4), and threaded rods (5) are fixed to both ends of the outer side of the transmission rod (4), and the outer side of the threaded rod (5) is threadedly connected to the sleeve (12).

4. A special ladder for loading and unloading vehicles according to claim 3, characterized in that: The two threaded rods (5) have opposite rotation directions.

5. A special ladder for loading and unloading vehicles according to claim 2, characterized in that: The limiting assembly comprises a ratchet (9) and a pawl (10); one end of the transmission rod (4) passes through a fixing block (2) and is fixed with the ratchet (9); one end of one of the fixing blocks (2) is rotatably connected to the pawl (10); and the bottom end of the pawl (10) is engaged with the ratchet (9).

6. A special ladder for loading and unloading vehicles according to claim 2, characterized in that: Both sides of the bottom end of the ladder body (1) are provided with a guide and limit mechanism for positioning the support base (8) and the ladder body (1), the guide and limit mechanism comprising a support block (13), a slider (14), an L-shaped frame (15) and a rectangular positioning block (16), the sliders (14) being fixed on both sides of the bottom end of the ladder body (1), the support blocks (13) being fixed on both sides of the top end of the support base (8), and the interior of the support block (13) being slidably connected to the slider (14).

7. A special ladder for loading and unloading vehicles according to claim 6, characterized in that: A plurality of rectangular grooves (17) are provided inside the sliding block (14), and a guide groove is provided at the top end inside the supporting block (13).

8. The special ladder for loading and unloading vehicles according to claim 6, characterized in that: An L-shaped frame (15) is fixed to one side of the support block (13); a connecting rod is slidably connected to the bottom end of the L-shaped frame (15); a hand pull cylinder (18) is fixed to one end of the connecting rod; a rectangular positioning block (16) is fixed to the other end of the connecting rod; one end of the rectangular positioning block (16) passes through a guide groove and is slidably connected to a corresponding rectangular groove (17).

9. The special ladder for loading and unloading vehicles according to claim 2, characterized in that: An L-shaped mounting rod (20) is fixed to one end of the bottom end of the ladder body (1), and rollers (21) are mounted on both sides of the L-shaped mounting rod (20).

10. A special ladder for loading and unloading vehicles according to claim 9, characterized in that: Anti-slip pads are fixed to the four ends of the bottom of the support base (8), and handrails (19) are installed on both sides of one end of the ladder body (1).

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