CN217439940U - Extension ladder - Google Patents

Abstract

The application discloses a telescopic ladder, which relates to the field of ladders and comprises an outer ladder section, an inner ladder section and a locking assembly, wherein the outer ladder section is provided with a cavity for accommodating the inner ladder section, and the inner ladder section is connected with the outer ladder section in a sliding manner; the locking assembly comprises a driving ring and locking strips, the driving ring is rotatably connected with the outer ladder sections, and the driving ring is provided with abdicating grooves for the inner ladder sections; the locking strip is fixedly connected to the inner wall of the driving ring, the inner ladder section is provided with a sliding groove arranged along the length direction of the inner ladder section, one end of the sliding groove is provided with a first positioning groove, the other end of the sliding groove is provided with a second positioning groove, the locking strip penetrates through the sliding groove, and the locking strip is connected with the inner wall of the sliding groove in a sliding mode. This application can improve the convenience of accomodating the extension ladder.

Description

Extension ladder

Technical Field

The application relates to the field of ladders, in particular to a telescopic ladder.

Background

When maintaining at house, apartment, farm, mill and other places, need ascend a height the operation with the ladder, in order to reduce the space position that the ladder took when not using, people can adopt the extension ladder that can stretch out and draw back, accomodate the ladder when not using to reduce the occupation space of ladder.

In the related art, the application document with the application number of cn202021792277.x discloses a stable insulating extension ladder, which comprises an insulating extension ladder, wherein a top self-holding rod device is fixedly installed at the upper end part of the insulating extension ladder, and a bottom self-holding rod device is fixedly installed at the lower end part of the insulating extension ladder; the top self-holding pole device comprises an upper right hoop device, an upper left hoop device, an upper right cap type connecting piece, an upper left cap type connecting piece, an upper U-shaped self-adaptive rubber pad, an upper tensioner and an upper belt; the mounting shaft on the mounting frame of the upper tensioner is fixed at the front end part of the upper right hoop device by a bolt, and the left end part of the upper belt is fixed at the front end part of the upper left hoop device by a bolt; the bottom self-holding pole device comprises a telescopic fixing support, a lower right hoop device, a lower left hoop device, a lower U-shaped self-adaptive rubber pad, a lower tightener and a lower belt.

In view of the above-mentioned related art, the inventor believes that when the extension ladder of the related art is carried, since the length of the extension ladder is long, the occupied space is large, and it is inconvenient to store the extension ladder.

SUMMERY OF THE UTILITY MODEL

In order to improve the convenience of accomodating the extension ladder, this application provides an extension ladder.

The application provides an extension ladder adopts following technical scheme:

an extension ladder comprises an outer ladder section, an inner ladder section and a locking assembly, wherein the outer ladder section is provided with a cavity for accommodating the inner ladder section, and the inner ladder section is connected with the outer ladder section in a sliding manner; the locking assembly comprises a driving ring and locking strips, the driving ring is rotatably connected with the outer ladder sections, and the driving ring is provided with abdicating grooves for the inner ladder sections; locking strip fixed connection in the drive ring inner wall, the sliding tray that sets up along its length direction is seted up to the inner ladder festival, first constant head tank has been seted up to sliding tray one end, the second constant head tank has been seted up to the sliding tray other end, the locking strip passes the sliding tray, the locking strip with sliding tray inner wall sliding connection.

Through adopting above-mentioned technical scheme, operating personnel is when accomodating the extension ladder, rotate the drive ring earlier, the drive ring rotates along outer ladder festival, the drive ring drives the locking strip and rotates, the locking strip moves along first constant head tank towards the sliding tray, locking strip moves to sliding tray department, operating personnel promotes interior ladder festival and outer ladder festival towards the direction that is close to each other, interior ladder festival moves along outer ladder festival axial direction, the length of extension ladder shortens, when locking strip moves one side of keeping away from first constant head tank to the sliding tray, operating personnel rotates the drive ring, it stretches into in the second constant head tank to drive the locking strip, the lateral wall of second constant head tank supports the locking strip, thereby conveniently fix the interior ladder festival and the outer ladder festival of state of accomodating, improve the convenience of accomodating the extension ladder.

Optionally, a plurality of third positioning grooves are formed between the first positioning groove and the second positioning groove, the third positioning grooves are arranged at intervals along the opening direction of the sliding groove, the third positioning grooves are communicated with the sliding groove, and the third positioning grooves are used for allowing the locking strips to stretch into the locking grooves.

Through adopting above-mentioned technical scheme, operating personnel rotates the drive ring, and the drive ring drives the locking strip and rotates, and the locking strip moves to different third constant head tank departments, and the lateral wall of third constant head tank is fixed the locking strip to improve the length that adjusts the outer ladder section of ladder festival of extension, make things convenient for the extension ladder to support not co-altitude position.

Optionally, the peripheral wall of the locking strip is arc-shaped.

Through adopting above-mentioned technical scheme, locking strip periphery wall sets up to the arc, and the locking strip moves along with the rotation of drive ring, and the arc periphery wall of locking strip reduces the frictional roughness between locking strip and the interior ladder festival, improves the convenience of adjusting locking strip position.

Optionally, the peripheral wall of the driving ring is further fixedly connected with a plurality of protruding strips, and the plurality of protruding strips are arranged at intervals along the peripheral wall of the driving ring.

Through adopting above-mentioned technical scheme, a plurality of sand grips of drive ring periphery wall fixed connection, a plurality of sand grips can increase the roughness of drive ring periphery wall, make things convenient for operating personnel to rotate the drive ring, improve the efficiency that the drive ring drove the motion of locking strip, make things convenient for the locking strip to fix the extension ladder of accomodating the state.

Optionally, a ball is connected between the driving ring and the outer peripheral wall of the inner ladder section, the ball protrudes out of the inner wall of the driving ring, and the other end of the ball is attached to the inner ladder section.

Through adopting above-mentioned technical scheme, the driving ring passes through the gyro wheel and the laminating of interior ladder festival outer wall, reduces the frictional force of driving ring rotation in-process, improves the efficiency of interior ladder festival and outer ladder festival.

Optionally, still include the base, the base is located outer ladder section is kept away from the one end of interior ladder section, the base with outer ladder section is articulated.

Through adopting above-mentioned technical scheme, when operating personnel used the extension ladder, the base was close to the laminating of ground with the extension ladder tip, increased the area of contact between extension ladder and the ground to improve the extension ladder and support fixed stability.

Optionally, the ladder comprises a buffer pad, the buffer pad is located at one end of the base far away from the outer ladder section, and the buffer pad is fixedly connected with the base.

Through adopting above-mentioned technical scheme, the outer wall connection blotter of base, the blotter supports the base, reduces the long-time probability that leads to wearing and tearing that uses of base, improves the reliability that the base supports to outer ladder section.

Optionally, the buffer slot has been seted up to the blotter one side of keeping away from the base, the buffer slot has been seted up a plurality ofly, and is a plurality of the buffer slot is followed the blotter interval sets up.

Through adopting above-mentioned technical scheme, the blotter outer wall is provided with a plurality of dashpots, and the dashpot is separated the blotter to increase the roughness of blotter, reduce the in-process emergence gliding probability that the base was supported to the blotter.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the extension ladder is stored, an operator rotates the driving ring, the driving ring drives the locking strips to rotate, the locking strips move towards the sliding grooves along the first positioning grooves, then the inner ladder sections are close to one side close to the outer ladder sections, the locking strips are close to the second positioning grooves along the sliding grooves, then the driving ring is rotated to move, and the driving ring drives the locking strips to be close to the second positioning grooves, so that the storage of the inner ladder sections and the outer ladder sections is realized, and the reliability of the storage of the extension ladder is improved;

2. the outer peripheral wall of the locking strip is arc-shaped, the locking strip moves along the first positioning groove, the probability of clamping stagnation is reduced by the arc-shaped outer wall of the locking strip, and the locking strip is convenient to fix the inner ladder section reliably;

3. the periphery wall fixedly connected with of drive ring has a plurality of sand grips, and a plurality of sand grips encircle the roughness that increases the periphery wall of drive ring to make things convenient for the drive ring to drive the motion of locking strip, improve the convenience of the fixed interior ladder section of locking strip.

Drawings

Fig. 1 is a schematic structural view of an extension ladder according to an embodiment of the present application;

fig. 2 is a perspective cross-sectional view of a telescopic ladder according to an embodiment of the present application;

fig. 3 is a sectional view of an extension ladder of an embodiment of the present application for illustrating a first detent structure;

fig. 4 is a schematic structural diagram of a connection state of a base and an outer ladder section of an extension ladder according to an embodiment of the present application.

Description of reference numerals: 1. an outer ladder section; 11. an outer column; 111. a cavity; 12. an outer support beam; 2. an inner ladder section; 21. an inner column; 211. a sliding groove; 212. a first positioning groove; 213. a second positioning groove; 214. a third positioning groove; 12. an inner support beam; 3. a locking assembly; 31. a drive ring; 311. a yielding groove; 32. a locking bar; 33. a convex strip; 34. a ball bearing; 4. a base; 5. a cushion pad; 51. a buffer tank.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses extension ladder. Referring to fig. 1 and 2, the extension ladder comprises an outer ladder section 1, an inner ladder section 2 and a locking assembly 3. The outer ladder section 1 is provided with a cavity 111 for accommodating the inner ladder section 2; the outer ladder section 1 comprises two outer upright columns 11 and a plurality of outer supporting beams 12, the outer upright columns 11 are cylindrical, the outer upright columns 11 are vertically arranged, and the two outer upright columns 11 are arranged at intervals; the outer supporting beams 12 are welded and fixed between the two outer upright posts 11, and the outer supporting beams 12 are arranged at intervals along the length direction of the outer upright posts 11; the inner ladder section 2 comprises two inner upright posts 21 and a plurality of inner supporting beams 12, each inner upright post 21 extends into one outer upright post 11, the radius of each inner upright post 21 is smaller than that of the corresponding outer upright post 11, and the inner upright posts 21 are connected with the outer upright posts 11 in a sliding manner; the inner supporting beam 12 penetrates through the opening of the inner cavity 111, the end part of the inner supporting beam 12 is welded and fixed with the outer peripheral wall of the inner upright post 21, the inner supporting beam 12 is arranged at intervals along the length direction of the inner upright post 21, the inner upright post 21 is provided with a sliding groove 211 penetrating through the side wall of the inner upright post, the sliding groove 211 is formed along the length direction of the inner upright post 21, one end of the sliding groove 211 is provided with a first positioning groove 212, and the first positioning groove 212 is formed around the outer peripheral direction of the inner upright post 21; the other end of the sliding groove 211 is provided with a second positioning groove 213, and the second positioning groove 213 and the first positioning groove 212 are arranged at an interval.

Referring to fig. 2 and 3, the locking assembly 3 includes a driving ring 31 and locking strips 32, the driving ring 31 is located at one end of the outer column 11, the driving ring 31 is coaxial with the outer column 11 and is rotatably connected to the outer column, a yielding groove 311 is formed in a side wall of one side of the driving ring 31, the locking strips 32 are located on an inner wall of the driving ring 31, the locking strips 32 are welded and fixed to an inner wall of the driving ring 31, the locking strips 32 penetrate through the first positioning groove 212 and are slidably connected to the first positioning groove 212, and the locking strips 32 can also slide along the sliding groove 211 or the second positioning groove 213, when the locking strips 32 are located in the sliding groove 211, the yielding groove 311 faces one side of the inner bracing beam 12, the inner ladder section 2 and the outer ladder section 1 slide relative to each other, so that the extension ladder can be conveniently adjusted along the length direction thereof.

When the inner ladder body is accommodated in the outer ladder body, the locking strips 32 are positioned at the first positioning grooves 212, an operator rotates the driving ring 31, the driving ring 31 drives the locking strips 32 to rotate, and the locking strips 32 rotate to the sliding grooves 211; then an operator pulls the inner ladder section 2 to move, the inner ladder section 2 slides with the outer ladder section 1, the locking strips 32 slide towards the second positioning grooves 213 along the sliding grooves 211, after the inner ladder section 2 and the outer ladder section 1 are unfolded, the locking strips 32 move to the second positioning grooves 213, the operator rotates the driving ring 31, the driving ring 31 drives the locking strips 32 to move towards the second positioning grooves 213, the inner walls of the second positioning grooves 213 limit the probability that the locking strips 32 rotate along the axial direction of the outer upright post 11, and the inner ladder section 2 and the outer ladder section 1 finish the fixation in the unfolded state; when accomodating the interior ladder body, operating personnel rotates drive ring 31, and drive ring 31 drives locking strip 32 and is close to sliding tray 211, and later locking strip 32 is close to towards second constant head tank 213 along sliding tray 211, and interior ladder section 2 gets into in the inner chamber, and locking strip 32 rotates to first constant head tank 212 in, and interior ladder section 2 is fixed in outer ladder section 1 to improve the convenience of accomodating outer ladder section 1.

Referring to fig. 2, in order to conveniently adjust the different heights of extension ladder adaptation, still be provided with a plurality of third constant head tanks 214 between first constant head tank 212 and the second constant head tank 213, the width of third constant head tank 214 is the same with the width of first constant head tank 212, third constant head tank 214 all communicates with sliding tray 211, a plurality of third constant head tanks 214 are seted up along the length direction interval of sliding tray 211, stretch into to different third constant head tanks 214 in through locking strip 32, thereby ladder section 2 stretches out the length of outer ladder section 1 in the regulation, conveniently be used for the extension ladder in the occasion of difference.

Referring to fig. 2 and 3, in order to reduce the probability of the locking bar 32 being stuck, the outer circumferential wall of the locking bar 32 is formed in an arc shape, and in this embodiment, the locking bar 32 is formed in a cylindrical shape; the peripheral wall of the drive ring 31 is also fixedly connected with a plurality of convex strips 33, the convex strips 33 are arranged in a plurality, the convex strips 33 surround the peripheral wall of the drive ring 31, and the convex strips 33 are all integrally formed with the drive ring 31; furthermore, the inner wall of the locking strip 32 is also rotatably connected with a plurality of balls 34, and one side of the ball 34 far away from the inner wall of the locking strip 32 is attached to the outer peripheral wall of the inner upright 21. A plurality of sand grips 33 form the drive ring 31 periphery wall and form the mat surface, the mat surface can make things convenient for operating personnel to grip the drive ring 31, ball 34 reduces the frictional force between drive ring 31 and the interior ladder post, support the drive ring 31 simultaneously, improve the efficiency that the drive ring 31 drove the motion of locking strip 32, the arc periphery wall of locking strip 32 reduces the probability that locking strip 32 takes place the jamming simultaneously, make things convenient for locking strip 32 to slide along sliding tray 211 inner wall.

Referring to fig. 4, for the convenience of supporting outer column 11, outer column 11 keeps away from that the one end of drive ring 31 articulates there is base 4, base 4 and outer column 11's articulated shaft perpendicular to outer column 11's length direction, base 4 keeps away from outer column 11's one end still through the mode fixedly connected with blotter 5 that bonds, a plurality of dashpots 51 have been seted up to one side that outer column 11 was kept away from to blotter 5, dashpot 51 is seted up along the lower terminal surface interval of blotter 5, thereby make blotter 5 form the mat face, make things convenient for blotter 5 to support base 4, it takes place gliding probability to reduce base 4, the convenience supports the extension ladder.

The implementation principle of an extension ladder in the embodiment of the application is as follows: when the telescopic ladder is used, an operator holds the driving ring 31, the locking strips 32 are driven to rotate through the convex strips 33 on the outer wall of the driving ring 31, after the locking strips 32 are close to the sliding grooves 211, the operator pulls the inner ladder section 2, the inner ladder section 2 extends out of the outer ladder section 1, the locking strips 32 move into the third positioning grooves 214, the third positioning grooves 214 limit the locking strips 32 to slide along the axial direction of the outer upright post 11, the inner ladder section 2 and the outer ladder section 1 are fixed, then the operator places the base 4 on the ground, and the buffer pads 5 support the outer ladder section 1, so that the telescopic ladder is convenient for the operator to use; when accomodating, operating personnel rotates drive ring 31 earlier, drive ring 31 moves to in the sliding tray 211, interior ladder section 2 is relieved with the fixed state of outer ladder section 1, operating personnel promotes interior ladder section 2 towards outer ladder section 1, interior ladder section 2 is accomodate to outer ladder section 1 in, rotate drive ring 31, drive ring 31 drives locking strip 32 and slides in first constant head tank 212, first constant head tank 212 is spacing to locking strip 32, the extension ladder is accomplished and is accomodate, the convenience of accomodating the extension ladder is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. An extension ladder, its characterized in that: the ladder comprises an outer ladder section (1), an inner ladder section (2) and a locking assembly (3), wherein the outer ladder section (1) is provided with a cavity (111) for accommodating the inner ladder section (2), and the inner ladder section (2) is connected with the outer ladder section (1) in a sliding manner; the locking assembly (3) comprises a driving ring (31) and locking strips (32), the driving ring (31) is rotatably connected with the outer ladder section (1), and the driving ring (31) is provided with a yielding groove (311) for the inner ladder section (2); the locking strip (32) is fixedly connected to the inner wall of the driving ring (31), the inner ladder section (2) is provided with a sliding groove (211) arranged along the length direction of the inner ladder section, one end of the sliding groove (211) is provided with a first positioning groove (212), the other end of the sliding groove (211) is provided with a second positioning groove (213), the locking strip (32) penetrates through the sliding groove (211), and the locking strip (32) is connected with the inner wall of the sliding groove (211) in a sliding mode.

2. An extension ladder as claimed in claim 1, wherein: a plurality of third positioning grooves (214) are arranged between the first positioning groove (212) and the second positioning groove (213), the third positioning grooves (214) are arranged at intervals along the opening direction of the sliding groove (211), the third positioning grooves (214) are communicated with the sliding groove (211), and the third positioning grooves (214) are used for allowing the locking strips (32) to stretch into the locking grooves.

3. An extension ladder as claimed in claim 1, wherein: the peripheral wall of the locking strip (32) is arc-shaped.

4. An extension ladder as claimed in claim 1, wherein: the periphery wall of the driving ring (31) is further fixedly connected with a plurality of convex strips (33), the convex strips (33) are arranged in a plurality, and the convex strips (33) are arranged at intervals along the periphery wall of the driving ring (31).

5. An extension ladder as claimed in claim 1, wherein: and balls (34) are connected between the driving ring (31) and the outer peripheral wall of the inner ladder section (2), the balls (34) protrude out of the inner wall of the driving ring (31), and the other end of each ball (34) is attached to the inner ladder section (2).

6. An extension ladder as claimed in claim 1, wherein: still include base (4), base (4) are located outer ladder section (1) is kept away from the one end of interior ladder section (2), base (4) with outer ladder section (1) is articulated.

7. An extension ladder as claimed in claim 6, wherein: still include blotter (5), blotter (5) are located base (4) are kept away from the one end of outer ladder section (1), blotter (5) with base (4) fixed connection.

8. An extension ladder as claimed in claim 7, wherein: buffer slot (51) have been seted up to blotter (5) one side of keeping away from base (4), buffer slot (51) have been seted up a plurality ofly, and is a plurality of buffer slot (51) are followed blotter (5) interval sets up.

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