CN110742375A

CN110742375A - Crawler-type cross-ladder draw-bar box

Info

Publication number: CN110742375A
Application number: CN201910999023.0A
Authority: CN
Inventors: 唐海涛; 刘磊; 单浩峰; 吴迪卉; 程佩佩; 马凤娟; 董育伟
Original assignee: Huaiyin Institute of Technology
Current assignee: Jiangsu Youdu Information Technology Co.,Ltd.
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-02-04
Anticipated expiration: 2039-10-21
Also published as: CN110742375B

Abstract

The invention discloses a crawler-type ladder-passing draw-bar box which comprises a box body, a climbing assembly and a power assembly, wherein the climbing assembly is bilaterally and symmetrically positioned in the lower portion of the back face of the box body and can extend out of the box body to climb a ladder, the power assembly is used for driving the climbing assembly to extend out of or retract into the box body, the climbing assembly comprises a pair of rollers arranged up and down, a connecting rod used for connecting the rollers and a crawler wound on the upper and lower rollers, the power assembly comprises a pin type telescopic assembly, one end of the pin type telescopic assembly is connected with the rollers, a sliding block connected with the other end of the pin type telescopic assembly, and a power spring. The climbing assembly is driven to retract and extend out of the box body by the aid of the ejector pin type telescopic assembly, when the climbing assembly is needed to be used, the climbing assembly is ejected out of the box body by the aid of the ejector pin type telescopic assembly, and when climbing is not needed, the climbing assembly retracts into the box body by the aid of the ejector pin type telescopic assembly, and appearance of the box body is not affected.

Description

Crawler-type cross-ladder draw-bar box

Technical Field

The invention belongs to a draw-bar box, and particularly relates to a crawler-type ladder-passing draw-bar box.

Background

The draw-bar box is a carrier, is a necessary object for people to travel, has a single type in the market at present, and lacks innovative breakthrough in function. For climbing stairs, most draw-bar boxes lack this function, which makes the user quite arduous when encountering ladder-type roadblocks. The draw-bar box produced by solving the problem in a small part has various designs but has some defects; for example, the function of the ladder stand is realized by means of external equipment, such as a mode that the pull rod box is put in a simple trolley through similarity, the crawler belt is installed at the back of the box body in the other ladder stand pull rod box, the function that the box body is matched with the gradient of the ladder is realized through a mode of bending the pull rod when the ladder stand is carried, but the structure is complex, the weight of the whole structure is large, the carrying is inconvenient, and the assembly is relatively complex.

Therefore, there is a need to solve the above problems.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a crawler-type ladder-passing draw-bar box which does not affect the appearance of a box body, has a light structure and can ensure that the draw-bar box can stably move under different road conditions.

The technical scheme is as follows: in order to achieve the purpose, the invention discloses a crawler-type ladder-passing draw-bar box which comprises a box body, a climbing assembly and a power assembly, wherein the climbing assembly is bilaterally and symmetrically positioned in the lower portion of the back face of the box body and can extend out of the box body to climb a ladder, the power assembly is used for driving the climbing assembly to extend out of or retract into the box body, the climbing assembly comprises a pair of rollers arranged up and down, a connecting rod used for connecting the rollers and a crawler wound on the upper and lower rollers, and the power assembly comprises a top pin type telescopic assembly, one end of which is connected with the rollers, a sliding block connected with the other end of the top pin type telescopic assembly and a power spring.

The limiting assembly comprises a limiting plate, a staple-shaped steel wire and an auxiliary spring, wherein the limiting plate is fixedly connected with the slider and can move along with the slider, one end of the staple-shaped steel wire is fixedly connected with the box body, the other end of the staple-shaped steel wire is hooked with the limiting block and can move in the limiting plate, the auxiliary spring is fixedly connected with the box body, one end of the auxiliary spring is fixedly connected with the other end of the auxiliary spring, the guide groove is used for the movement of the steel wire and forms a one-way closed-loop track, and comprises a stopping groove used for initial steel wire positioning, a first track guide groove convenient for the steel wire to slide out of the stopping groove and move backwards, a one-way baffle plate positioned on the first track guide groove and used for avoiding the return of the steel wire along the first track guide groove, and a second track guide groove convenient for the steel.

Preferably, the one-way baffle is a rubber piece.

Furthermore, the knock-pin type telescopic assembly comprises a sleeve with one end connected with the sliding block, a loop bar with the front end extending into the sleeve and the rear end connected with the roller, a pawl piece sleeved on the outer wall of the front end of the loop bar, a front ratchet piece abutted against the front end surface of the loop bar and adapted to the pawl, a front spring with two ends respectively abutted against the front ratchet block and the sleeve, a rear ratchet piece sleeved on the outer wall of the loop bar, and a rear spring with two ends respectively abutted against the rear ratchet piece and the sleeve, wherein the pawl piece, the front ratchet piece, the front spring, the rear ratchet piece and the rear spring are all positioned in the sleeve.

Further, the inner wall of the sleeve is provided with sliding blocks which are uniformly distributed along the circumferential direction, two ends of each sliding block are provided with inclined planes, sliding grooves matched with the sliding blocks are uniformly distributed on the outer walls of the front ratchet member, the rear ratchet member and the pawl member, a plurality of indexing claws are uniformly distributed on the end portions of one side of each of the front ratchet member and the rear ratchet member, the indexing claws are provided with deep grooves and shallow grooves which are arranged in a staggered mode, pawls are uniformly distributed on the end portions of two sides of the pawl member, and long slopes and short slopes which are arranged in a staggered mode are arranged on the pawls.

Preferably, an opening hollow cavity for placing the climbing assembly and the power assembly is arranged in the box body, a slidable cover plate for closing the opening hollow cavity is connected to the opening hollow cavity, and a protruding part is arranged at the upper end of the cover plate; the box body is provided with a groove for facilitating the sliding of the cover plate along the box body and a concave part matched with the convex part.

Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:

(1) the climbing assembly is driven to retract and extend out of the box body by the aid of the knock pin type telescopic assembly, when the climbing assembly is required to be used, the climbing assembly is ejected out of the box body by the aid of the knock pin type telescopic assembly, and when climbing is not required, the climbing assembly retracts into the box body by the aid of the knock pin type telescopic assembly, so that the appearance of the box body is not influenced;

(2) the structure of the invention is light and handy, does not need complex parts, and occupies small volume in the box body;

(3) the invention can adjust the extending length of the pin type telescopic component at the upper and lower positions, wherein the sleeve can rotate for a certain angle around the sliding block, and can also adapt to stairs with different slopes by adjusting the angle, thereby achieving the function of self-adapting to the slopes of the stairs.

(4) The limiting assembly can effectively prevent the sliding block from sliding out of the box body in the process of popping out the roller, and can also ensure that the sliding block returns to the initial position in the process of retracting the roller to prepare for next use;

(5) when the sliding block and the limiting plate are used as an integral structure, the front part and the rear part of the integral structure are respectively connected with the box body through the power spring and the auxiliary spring, in the using process, the auxiliary spring is pulled, the power spring is pressed, the two springs generate acting force in the same direction to act on the box body, and the acting force generated by the deformation of the springs can achieve the effect of supporting the weight of the draw-bar box without limiting the sliding block again.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a half case of the present invention with a cover removed;

FIG. 3 is a front view of the half of the case of the present invention with the cover removed;

FIG. 4 is a schematic view of the climbing assembly of the present invention installed in a housing;

FIG. 5 is a schematic view of the cover plate according to the present invention;

FIG. 6 is a schematic structural view of a climbing assembly, a power assembly and a limiting assembly in the present invention;

FIG. 7 is a schematic structural view of a power assembly and a limit assembly of the present invention;

FIG. 8 is a schematic structural view of a slider according to the present invention;

FIG. 9 is a schematic view of the pin jack assembly of the present invention;

FIG. 10 is a cross-sectional view of the pin jack assembly of the present invention;

FIG. 11 is a schematic view of the construction of the pin jack assembly of the present invention with the sleeve removed;

FIG. 12 is a schematic view of the structure of a loop bar according to the present invention;

FIG. 13 is a schematic view of the front ratchet member of the present invention;

FIG. 14 is a cross-sectional view of a cannula according to the present invention;

FIG. 15 is a top view of a limiting plate according to the present invention;

FIGS. 16(a) -16 (d) are the movement process diagrams of the position-limiting component of the present invention;

figure 17(a) is a schematic view of the present invention showing the pin jack retraction assembly with the climbing assembly extended;

figure 17(b) is a schematic view of the pin jack telescoping assembly of the present invention with the climbing assembly retracted.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings.

As shown in fig. 1, 2, 3, 4 and 5, the crawler-type ladder-passing draw-bar box of the invention comprises a box body 1, wherein the box body can be a box body of a common draw-bar box, and the box body is provided with universal wheels, a pull rod and the like; an open hollow cavity 101 is separated from the lower part of the back of the box body, a slidable cover plate 11 for closing the open hollow cavity is connected to the open hollow cavity 101, and a protruding part 12 is arranged at the upper end of the cover plate 11. The back of the box body is provided with a groove 102 which is convenient for the cover plate to slide along the groove, and a concave part 103 which is matched with the convex part is arranged above the groove 102. When the cover plate 11 slides up the groove 102 until the protrusion 12 snaps into the recess 103, the cover plate 11 leaves and the open hollow cavity 101 opens.

As shown in fig. 6, 7 and 8, the climbing assembly and the power assembly of the present invention, which are symmetrically arranged left and right, are located in the open hollow cavity 101, the climbing assembly can extend out of the box body for climbing a ladder, and the power assembly is used for driving the climbing assembly to extend out of or retract into the open hollow cavity 101. The climbing assembly comprises rollers 2, connecting rods 3 and a crawler 4, wherein the rollers 2 are vertically arranged, the two rollers are fixedly connected through the connecting rods 3, and the upper and lower rollers are parallelly wound with the crawler 4 by 2. The upper and lower rollers 2 of the invention are respectively connected with a power assembly, and the power assembly comprises a pin type telescopic assembly 5, one end of which is connected with the roller, a slide block 6 and a power spring 7, wherein the slide block is connected with the other end of the pin type telescopic assembly, one end of the power spring abuts against the slide block, and the other end of the power spring is fixed with the box body.

As shown in fig. 9, 10 and 11, the knock-pin type telescopic assembly 5 of the present invention includes a sleeve 501, a sleeve rod 502, a pawl 503, a front ratchet member 504, a front spring 505, a rear ratchet member 506 and a rear spring 507, the front end of the sleeve rod 502 is inserted into the sleeve 501, the rear end of the sleeve rod is connected to a roller, and the end of the sleeve 501 remote from the sleeve rod is connected to the slider 6. The pawl 503, the front ratchet member 504, the front spring 505, the rear ratchet member 506 and the rear spring 507 are all located in the sleeve 501, the pawl 503 is sleeved on the outer wall of the front end of the sleeve rod, the front ratchet member 504 is abutted against the front end face of the sleeve rod and is matched with the pawl, two ends of the front spring 505 are abutted against the front ratchet block and the sleeve respectively, the rear ratchet member 50 is sleeved on the outer wall of the sleeve rod, and two ends of the rear spring 507 are abutted against the rear ratchet member and the sleeve respectively. As shown in fig. 12, 13 and 14, the inner wall of the sleeve 501 has sliders 508 uniformly distributed along the circumferential direction, both ends of the sliders are provided with inclined planes 509, the outer walls of the front ratchet member 504, the rear ratchet member 506 and the pawl member 503 are uniformly provided with sliding slots 510 matched with the sliders, one end of each of the front ratchet member 504 and the rear ratchet member 506 is uniformly provided with a plurality of indexing claws 511, the indexing claws are provided with deep slots and shallow slots which are staggered, and both ends of the pawl member 503 are uniformly provided with pawls 512, which are provided with long slopes and short slopes which are staggered. The invention can adjust the extension length of the pin-ejecting type telescopic component at the upper and lower positions, wherein the sleeve 501 can rotate for a certain angle around the slide block 6, and can also adapt to the stairs with different slopes by adjusting the angle, thereby achieving the function of self-adapting to the slopes of the stairs.

The slider of the invention is also connected with a limiting component for limiting the movement of the slider, the limiting component comprises a limiting plate 8, a steel wire 9 and an auxiliary spring 10, the limiting plate 8 is fixedly connected with the slider 6 and can move along with the slider 6, the steel wire 9 is a staple-shaped steel wire, one end of the steel wire 9 is fixedly connected with the box body, and the other end of the steel wire 9 is hooked with the limiting block and can move in the limiting plate. One end of the auxiliary spring 10 is fixedly connected with the box body 1 and the other end is fixedly connected with the limiting plate 8. As shown in fig. 15, a guide groove 801 for the movement of the steel wire and forming a unidirectional closed-loop trajectory is formed on the limiting plate 8, the guide groove 801 includes a stopping groove 802 for positioning the initial steel wire, a first trajectory guide groove 803 for facilitating the steel wire to slide out of the stopping groove and move backward, a unidirectional baffle 804 located on the first trajectory guide groove for preventing the steel wire from returning along the first trajectory guide groove, and a second trajectory guide groove 805 for facilitating the steel wire to move forward and return into the stopping groove, wherein the unidirectional baffle 804 is a soft rubber member, and a transition guide arc surface 806 for facilitating the steel wire to move to the first trajectory guide groove is disposed between the stopping groove 802 and the first trajectory guide groove 803. As shown in fig. 16(a) to 16(d), the assist spring 10 is in a stretched state throughout the entire movement, but the assist spring 10 is stretched from fig. 16(a) to 16(b), the assist spring 10 is shortened from fig. 16(b) to 16(c), and the assist spring 10 is stretched from fig. 16(c) to 16 (d).

As shown in fig. 16(a) -16 (d) and 17(a) -17 (b), in the initial state of the present invention, both the climbing assembly and the power assembly are located in the housing, with the sleeve 502 retracted within the sleeve 501 and the pawl 503 locked in cooperation with the front ratchet member 504. After a cover plate 11 on the open hollow cavity 101 is pushed open, the roller 2 is pressed, force acts on the loop bar 502, the loop bar 502 and the pawl 503 push the front ratchet wheel 504 to move towards the inner direction of the box body together, the front spring 505 is in a compressed state, the front spring 505 pushes the slider 6 and the power spring 7 to move inwards through the sleeve 501 when compressed, the resistance spring 7 is in a compressed state, at the moment, the slider 6 drives the limit plate 8 to move inwards, and the steel wire 9 leaves the stopping groove 802 and slides into the first track guide groove 803; the front ratchet member 504 is pushed to move inwards for a certain distance, the rear indexing pawl is matched with the pawl to rotate, the pawl member 503 is unlocked with the front ratchet member 504, the pawl member and the sleeve rod move backwards and withdraw, the roller 2 is continuously pulled outwards, the sleeve rod 502 moves outwards along the sleeve 501 until the pawl member 503 is matched with the rear ratchet member 506 to be locked, and the rear spring 507 is in a compressed state; the roller 2 and the crawler can be used for climbing; when climbing is finished and the roller 2 needs to be retracted, the roller 2 is pressed, force acts on the loop bar 502, the loop bar 502 moves inwards, the pawl 503 is separated from the rear ratchet member 506 to be unlocked, the roller 2 and the loop bar 502 are continuously pushed, and the loop bar 502 moves inwards along the sleeve 501 to retract until the pawl 503 is matched with the front ratchet member 504 to be locked; at this time, the sleeve 501 pushes the slider 6 to move inward, the sliding plate 6 drives the limiting plate to move inward, the steel wire 9 slides into the stopping groove 802 along the second track guiding groove 805, and the device returns to the initial state, wherein the one-way baffle 804 prevents the steel wire from sliding back to the stopping groove 802 along the first track guiding groove 803.

Claims

1. The utility model provides a ladder draw-bar box is crossed to crawler-type which characterized in that: the climbing device comprises a box body (1), climbing components which are arranged inside the lower portion of the back face of the box body in a bilateral symmetry mode and can extend out of the box body to climb a ladder, and power components used for driving the climbing components to extend out of or retract into the box body, wherein the climbing components comprise a pair of rollers (2) arranged up and down, a connecting rod (3) used for connecting the rollers, and a track (4) wound on the rollers up and down, the power components comprise ejector pin type telescopic components (5) with one ends connected with the rollers, a sliding block (6) connected with the other end of the ejector pin type telescopic components, and a power-assisted spring (7) with one end supported on the sliding block and.

2. The crawler-type ladder-passing draw-bar box of claim 1, characterized in that: the slide block is also connected with a limiting component for limiting the motion of the slide block, the limiting component comprises a limiting plate (8) which is fixedly connected with the slide block and can move along with the slide block, a staple-shaped steel wire (9) of which one end is fixedly connected with the box body and the other end is hooked with the limiting block and can move in the limiting plate, and an auxiliary spring (10) of which one end is fixedly connected with the box body and the other end is fixedly connected with the limiting plate, the limiting plate (8) is provided with a guide groove (801) which is used for the movement of the steel wire and forms a unidirectional closed-loop track, the guide groove (801) comprises a stopping groove (802) for positioning an initial steel wire, a first track guide groove (803) for facilitating the steel wire to slide out of the stopping groove and move backwards, a one-way baffle (804) positioned on the first track guide groove and used for avoiding the steel wire from returning along the first track guide groove, and a second track guide groove (805) for facilitating the steel wire to move forwards and return into the stopping groove.

3. The crawler-type ladder-passing draw-bar box of claim 2, characterized in that: the one-way baffle (804) is a rubber piece.

4. The crawler-type ladder-passing draw-bar box of claim 1, characterized in that: the ejector pin type telescopic assembly (5) comprises a sleeve (501) with one end connected with a sliding block, a loop bar (502) with the front end extending into the sleeve and the rear end connected with a roller, a pawl (503) sleeved on the outer wall of the front end of the loop bar, a front ratchet member (504) which is abutted to the front end face of the loop bar and is matched with the pawl, a front spring (505) with two ends respectively abutted to the front ratchet block and the sleeve, a rear ratchet member (506) sleeved on the outer wall of the loop bar and a rear spring (507) with two ends respectively abutted to the rear ratchet member and the sleeve, wherein the pawl (503), the front ratchet member (504), the front spring (505), the rear ratchet member (506) and the rear spring (507) are all located in the sleeve (501).

5. The crawler-type ladder-passing draw-bar box of claim 4, characterized in that: the inner wall of the sleeve (501) is provided with sliding blocks (508) which are uniformly distributed along the circumferential direction, two ends of each sliding block are provided with inclined planes (509), the outer walls of the front ratchet piece (504), the rear ratchet piece (506) and the pawl piece (503) are uniformly provided with sliding grooves (510) matched with the sliding blocks, one side end parts of the front ratchet piece (504) and the rear ratchet piece (506) are uniformly provided with a plurality of indexing claws (511), the indexing claws are provided with deep grooves and shallow grooves which are arranged in a staggered mode, the two side end parts of the pawl piece (503) are uniformly provided with pawls (512), and the pawls are provided with long slopes and short slopes which are arranged in a staggered mode.

6. The crawler-type ladder-passing draw-bar box of claim 1, characterized in that: an opening hollow cavity (101) for placing the climbing assembly and the power assembly is arranged in the box body (1), a slidable cover plate (11) for closing the opening hollow cavity is connected to the opening hollow cavity (101), and a protruding part (12) is arranged at the upper end of the cover plate (11); the box body (1) is provided with a groove (102) for facilitating the sliding of the cover plate along the groove and a concave part (103) matched with the convex part.