Extension ladder for getting on and off motor home

Abstract

The utility model relates to the technical field of recreational vehicle accessories, and provides an extension ladder for getting on and off a recreational vehicle, which comprises a U-shaped frame, a U-shaped groove is arranged at the top of the U-shaped frame, sliding grooves are arranged on opposite sides of the U-shaped groove, and two first movable strips are symmetrically and movably embedded in the U-shaped groove. According to the device, the controller is used for controlling an electric telescopic rod to start, pushing a third round rod to move towards one side along the interior of a sliding groove, synchronously enabling a rolling wheel to roll on a fixed plate, pushing a first movable strip and a second movable strip to move towards one side, enabling a ball to roll on a U-shaped groove, and driving a connecting block to rotate downwards around the outer surface of the third round rod; at the moment, the limiting hook is hung on the outer surface of the limiting rod, upward pulling force is applied to the second movable strip, and the first movable strip, the second movable strip and the pedal are unfolded in a parallelogram shape, so that the extension ladder used for the motor home can be easily unfolded, abrasion of the extension ladder is reduced, and the service life of the extension ladder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of recreational vehicle accessories, in particular to a telescopic ladder for going up and down a recreational vehicle. Background Art

[0002] RV, also known as home on wheels, has the functions of both a house and a car, but its attribute is still a car. It is a mobile vehicle with basic facilities necessary for home. RV is a fashionable vehicle introduced from abroad. The home facilities on the vehicle include: bedding, stove, refrigerator, cabinet, sofa, dining table and chairs, washing facilities, air conditioner, TV, stereo and other furniture and electrical appliances. It can be divided into driving area, living area, bedroom area, sanitary area, kitchen area, etc. RV is a fashionable product that integrates clothing, food, housing and transportation, and realizes travel in life and life in travel.

[0003] In the prior art, RVs are a type of mobile vehicle with basic facilities necessary for home use. In order to facilitate users to go up and down, RVs are usually equipped with telescopic ladders. However, during the extension and contraction process, existing telescopic ladders are prone to friction with the telescopic ladder frame, which not only makes the extension and contraction of the telescopic ladder more troublesome, but also easily causes severe wear and tear on the telescopic ladder, thereby reducing the service life of the telescopic ladder. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that a motorhome is a movable vehicle with basic facilities necessary for a home, and in order to facilitate users to go up and down, a motorhome is usually equipped with a telescopic ladder, but the existing telescopic ladder is prone to friction with the telescopic ladder frame during the extension and contraction process, which not only makes the extension and contraction of the telescopic ladder more troublesome, but also easily causes serious wear and tear on the telescopic ladder, thereby reducing the service life of the telescopic ladder.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a telescopic ladder for getting on and off a motorhome, comprising: a U-shaped frame, a U-shaped groove is provided on the top of the U-shaped frame, a slide groove is provided on the opposite sides of the U-shaped groove, two movable bars 1 are symmetrically and movably embedded in the interior of the U-shaped groove, a plurality of round rods 1 are equidistantly and movably embedded in the opposite sides of the two movable bars 1, the plurality of round rods 1 are evenly divided into a group of two, a pedal is fixedly installed on the opposite ends of the plurality of groups of round rods 1, two movable bars 2 are symmetrically and movably embedded in the interior of the U-shaped groove, and the two movable bars 2 are respectively located at two Directly above a movable bar 1, a plurality of round rods 2 are equidistantly and movably embedded on opposite sides of the two movable bars 2, the plurality of round rods 2 are evenly divided into a group of two, and the opposite ends of the plurality of groups of round rods 2 are respectively fixedly mounted on opposite sides of a plurality of pedals near one end, a round rod 3 is movably embedded inside the two slide grooves, and two connecting blocks are symmetrically and movably sleeved on the outer surfaces of the round rods 3, one side of the two connecting blocks are respectively fixedly mounted on one side of the two movable bars 1, a fixing plate is fixedly mounted on the opposite sides of the U-shaped frame near the bottom, and rollers are movably sleeved on both ends of the two round rods 3.

[0006] Preferably, an electric telescopic rod is fixedly embedded in the center of one side of the U-shaped frame, one end of the electric telescopic rod is fixedly sleeved on the outer surface of the round rod three, and a plurality of balls are equidistantly and movably embedded at the bottom of the two movable bars one. The electric telescopic rod is started by controlling the controller to extend or contract, which can push the round rod three to slide to one side along the inside of the slide groove.

[0007] Preferably, the U-shaped frame is fixedly installed with fixing bars on the tops of the two arms away from the electric telescopic rod, and limiting rods are fixedly installed on opposite sides of the two fixing bars close to the tops. The setting of the limiting rods plays a role in limiting the limiting hooks.

[0008] Preferably, the tops of the two movable bars away from the fixed bar are fixedly installed with limiting hooks, and the tops of the two U-shaped grooves close to the inner walls of the fixed bar are arranged as arc surfaces, and the setting of the limiting hooks plays a role in limiting the movable bars.

[0009] Preferably, the U-shaped frame is fixedly installed with guide blocks at the bottom of the two arms close to the fixed bar, and the insides of the two guide blocks are slidably connected with sliding rods. By applying a thrust to the sliding rods, the sliding rods can slide to one side along the inside of the guide blocks.

[0010] Preferably, both ends of the two sliding rods are fixedly installed with limiting plates, and one side of one of the limiting plates is symmetrically fixedly installed with two guide plates, and the two guide plates are both arranged to be inclined. The setting of the guide plates plays a certain supporting role, and the setting of the limiting plates plays a certain limiting role.

[0011] Preferably, two fixed rods 1 are symmetrically fixedly installed on the opposite side of the two movable bars 1, and two pushing blocks are symmetrically fixedly mounted on the outer surfaces of the two fixed rods 1, and two force blocks are symmetrically fixedly installed on the tops of the two limit plates. Through the above-mentioned arrangement, when the movable bar 1 moves, it can drive the fixed rod 1 and the pushing block to move, thereby applying a thrust to the force block.

[0012] Preferably, two vertical plates are symmetrically fixedly installed on the bottom of one of the limit plates, two support plates are fixedly installed on one side of the two vertical plates, and the multiple support plates are evenly divided into two groups, and one side of the two groups of support plates are respectively fixedly installed on the bottom inclined surfaces of the two guide plates. Through the cooperation of the vertical plates and the support plates, the stability of the guide plates can be improved.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. The utility model controls the start of the electric telescopic rod through a controller to extend it, pushes the round rod three to move to one side along the inside of the slide groove, and simultaneously makes the roller roll on the fixed plate, pushes the movable bar one and the movable bar two to move to one side, and makes the ball roll on the top of the U-shaped groove. When the round rod three moves to the end of the slide groove, the ball at the bottom of the movable bar one close to the connecting block moves to the arc position of the U-shaped groove, so that the movable bar one and the movable bar two drive the connecting block to rotate downward around the outer surface of the round rod three under the action of gravity, and at this time the limit hook is hung on the outer surface of the limit rod, exerting an upward pulling force on the movable bar two, and with the cooperation of the round rod one and the round rod two, the movable bar one, the movable bar two and the pedal are unfolded in a parallelogram, so that the telescopic ladder used in the RV can be easily unfolded, the wear of the telescopic ladder is reduced, and the service life of the telescopic ladder is increased.

[0015] 2. The utility model can drive the fixed rod 1 and the pushing block to move by moving the movable bar 1, so that the pushing block at the position far away from the guide plate contacts the force-bearing block at the position far away from the guide plate, and applies a thrust, so that the limit plate drives the sliding rod to move to one side along the inside of the guide block, so that the guide plate extends from the bottom of the U-shaped frame. At this time, the inclined surface of the guide plate just corresponds to the arc surface of the U-shaped groove, so that when the movable bar 1 rotates downward, part of the position can fall under the guide plate, and the guide plate is supported to a certain extent by the guide plate. With the cooperation of the vertical plate and the support plate, the stability of the guide plate can be improved. In this way, by supporting the movable bar 1, the stability of the device during use can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a telescopic ladder for getting on and off a motorhome provided by the utility model;

[0017] Figure 2A schematic diagram of the side structure of a telescopic ladder for getting on and off a motorhome provided by the utility model;

[0018] Figure 3 A schematic diagram of the structure of a telescopic ladder for getting on and off a motorhome provided by the utility model when viewed from above;

[0019] Figure 4 The utility model is a schematic cross-sectional structure diagram of a telescopic ladder for getting on and off a recreational vehicle.

[0020] Legend:

[0021] 1. U-shaped frame; 101. slide groove; 102. movable bar one; 103. round rod one; 104. movable bar two; 105. round rod two; 106. electric telescopic rod; 107. limit hook; 108. fixed bar; 109. limit rod; 110. connecting block; 111. pedal; 112. U-shaped groove; 113. ball; 2. fixed plate; 201. roller; 202. round rod three; 3. guide block; 301. slide rod; 302. limit plate; 303. guide plate; 304. vertical plate; 305. support plate; 306. fixed rod one; 307. push block; 308. force block. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0024] Embodiment 1, as Figure 1-4As shown, the utility model provides a telescopic ladder for getting on and off a caravan, comprising: a U-shaped frame 1, a U-shaped groove 112 is provided on the top of the U-shaped frame 1, a slide groove 101 is provided on the opposite side of the U-shaped groove 112, two movable bars 102 are symmetrically and movably embedded inside the U-shaped groove 112, a plurality of round rods 103 are equidistantly and movably embedded on the opposite side of the two movable bars 102, the plurality of round rods 103 are evenly divided into a group of two, and a pedal 111 is fixedly installed on the opposite ends of the plurality of groups of round rods 103, two movable bars 2 104 are symmetrically and movably embedded inside the U-shaped groove 112, the two movable bars 2 104 are respectively located directly above the two movable bars 102, a plurality of round rods 2 105 are equidistantly and movably embedded on the opposite side of the two movable bars 104, the plurality of round rods 2 105 are evenly divided into a group of two, and the opposite ends of the plurality of groups of round rods 2 105 are respectively fixedly installed on the opposite side of the plurality of pedals 111 close to one end, and the inner movability of the two slide grooves 101 A round rod three 202 is movably embedded, and two connecting blocks 110 are symmetrically and movably sleeved on the outer surface of the round rod three 202. One side of the two connecting blocks 110 is respectively fixedly installed on one side of the two movable bars 102. A fixing plate 2 is fixedly installed on the opposite side of the U-shaped frame 1 near the bottom. Both ends of the two round rods three 202 are movably sleeved with rollers 201. An electric telescopic rod 106 is fixedly embedded at the center of one side of the U-shaped frame 1, and one end of the electric telescopic rod 106 is fixedly sleeved on the outer surface of the round rod three 202. A plurality of balls 113 are movably embedded at the bottom of the two movable bars 102 at equal distances. A fixing bar 108 is fixedly installed on the top of the two arms of the U-shaped frame 1 away from the electric telescopic rod 106. A limiting rod 109 is fixedly installed on the opposite side of the two fixing bars 108 near the top. A limiting hook 107 is fixedly installed on the top of the two movable bars 104 away from the fixing bar 108. The tops of the two U-shaped grooves 112 near the inner walls of the fixing bars 108 are both set to arc surfaces.

[0025] In this embodiment, the electric telescopic rod 106 is started by the controller to extend, push the round rod 3 202 to move to one side along the inside of the slide groove 101, and simultaneously make the roller 201 roll on the fixed plate 2, push the movable bar 102 and the movable bar 2 104 to move to one side, so that the ball 113 rolls on the U-shaped groove 112. When the round rod 3 202 moves to the end of the slide groove 101, the ball 113 at the bottom of the movable bar 102 close to the connecting block 110 moves to the arc position of the U-shaped groove 112, so that Under the action of gravity, the movable bar 102 and the movable bar 2 104 drive the connecting block 110 to rotate downward around the outer surface of the round rod 3 202, and at this time, the limit hook 107 is hung on the outer surface of the limit rod 109, applying an upward pulling force to the movable bar 2 104, and with the cooperation of the round rod 103 and the round rod 2 105, the movable bar 102, the movable bar 2 104 and the pedal 111 are expanded into a parallelogram, so that the telescopic ladder used in the RV can be easily expanded, reducing the wear of the telescopic ladder, thereby increasing the service life of the telescopic ladder.

[0026] Embodiment 2, as Figure 1-4 As shown, guide blocks 3 are fixedly installed at the bottom of the two arms of the U-shaped frame 1 near the fixed bar 108, and sliding rods 301 are slidably connected inside the two guide blocks 3, and limiting plates 302 are fixedly installed at both ends of the two sliding rods 301, and two guide plates 303 are symmetrically fixedly installed on one side of one limiting plate 302, and the two guide plates 303 are both set to be inclined, and two fixing rods 306 are symmetrically fixedly installed on the opposite side of the two movable bars 102, and two pushing blocks 307 are symmetrically fixedly sleeved on the outer surfaces of the two fixing rods 306, and two force blocks 308 are symmetrically fixedly installed on the top of the two limiting plates 302, and two vertical plates 304 are symmetrically fixedly installed on the bottom of one of the limiting plates 302, and two support plates 305 are fixedly installed on one side of the two vertical plates 304, and the multiple support plates 305 are evenly divided into two groups, and one side of the two groups of support plates 305 is respectively fixedly installed on the bottom inclined surface of the two guide plates 303.

[0027] In this embodiment, the movement of the movable bar 102 can drive the fixed rod 306 and the pushing block 307 to move, so that the pushing block 307 at the position away from the guide plate 303 contacts the force-bearing block 308 at the position away from the guide plate 303, and applies a thrust, so that the limit plate 302 drives the sliding rod 301 to move to one side along the inside of the guide block 3, so that the guide plate 303 extends from the bottom of the U-shaped frame 1. At this time, the inclined surface of the guide plate 303 just corresponds to the arc surface of the U-shaped groove 112, so that when the movable bar 102 rotates downward, part of the position can fall under the guide plate 303, and the guide plate 303 is supported to a certain extent by the guide plate 303. With the cooperation of the vertical plate 304 and the support plate 305, the stability of the guide plate 303 can be improved. In this way, by supporting the movable bar 102, the stability of the device during use can be improved. When the electric telescopic rod 106 is controlled to retract by the controller, the round rod three 202 can apply a pulling force to the connecting block 110, thereby applying a pulling force to the movable bar 102, so that the movable bar 102 slides upward along the top of the guide plate 303 with the cooperation of the ball 113. At this time, the limit hook 107 is disengaged from the limit rod 109, and the movable bar 2 104 moves downward under the action of gravity, so that the movable bar 2 104 and the pedal 111 return to the initial state. When the movable bar 102 moves a certain distance, the pushing block 307 close to the guide plate 303 contacts the force block 308 close to the guide plate 303 and applies a thrust to the force block 308, so that the limit plate 302 close to the guide plate 303 pushes the slide bar 301 to move to the other side along the inside of the guide block 3, thereby returning the guide plate 303 to its original position.

[0028] Working principle: When in use, the electric telescopic rod 106 is started and extended through the controller, pushing the round rod 3 202 to move to one side along the inside of the slide groove 101, and synchronously making the roller 201 roll on the fixed plate 2, pushing the movable bar 102 and the movable bar 2 104 to move to one side, so that the ball 113 rolls on the U-shaped groove 112. When the round rod 3 202 moves to the end of the slide groove 101, the ball 113 at the bottom of the movable bar 102 close to the connecting block 110 moves to the arc position of the U-shaped groove 112, so that the movable bar 102 and the movable bar 2 104 drive the connecting block 110 to rotate downward around the outer surface of the round rod 3 202 under the action of gravity. The movable bar 102 is moved, and the limit hook 107 is hung on the outer surface of the limit rod 109 at this time, applying an upward pulling force to the movable bar 104, and under the cooperation of the round rod 103 and the round rod 105, the movable bar 102, the movable bar 104 and the pedal 111 are unfolded in a parallelogram, so that the telescopic ladder used in the RV can be easily unfolded, reducing the wear of the telescopic ladder, thereby increasing the service life of the telescopic ladder, and synchronously through the movement of the movable bar 102, the fixed rod 1 306 and the pushing block 307 can be driven to move, so that the pushing block 307 at a position away from the guide plate 303 contacts the force block 308 at a position away from the guide plate 303, and applies a thrust, so that the limit plate 302 drives The slide bar 301 moves to one side along the inside of the guide block 3, so that the guide plate 303 extends out from the bottom of the U-shaped frame 1. At this time, the inclined surface of the guide plate 303 corresponds to the arc surface of the U-shaped groove 112, so that when the movable bar 102 rotates downward, part of the position can fall under the guide plate 303. The guide plate 303 is supported to a certain extent, and with the cooperation of the vertical plate 304 and the support plate 305, the stability of the guide plate 303 can be improved. In this way, the stability of the device during use can be improved by supporting the movable bar 102. When the electric telescopic rod 106 is controlled by the controller to retract, the round rod 302 can apply a pulling force to the connecting block 110, thereby The movable bar 102 applies a pulling force, so that the movable bar 102 slides upward along the top of the guide plate 303 with the cooperation of the ball 113. At this time, the limit hook 107 is disengaged from the limit rod 109, and the movable bar 104 moves downward under the action of gravity, so that the movable bar 104 and the pedal 111 return to the initial state. When the movable bar 102 moves a certain distance, the pushing block 307 close to the guide plate 303 contacts the force block 308 close to the guide plate 303 and applies a thrust to the force block 308, so that the limit plate 302 close to the guide plate 303 pushes the slide bar 301 to move to the other side along the inside of the guide block 3, thereby returning the guide plate 303 to its original position.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A telescopic ladder for getting on and off a motorhome, characterized in that: include: A U-shaped frame (1), wherein a U-shaped groove (112) is provided on the top of the U-shaped frame (1), a slide groove (101) is provided on opposite sides of the U-shaped groove (112), two movable bars (102) are symmetrically and movably embedded inside the U-shaped groove (112), a plurality of round rods (103) are equidistantly and movably embedded on opposite sides of the two movable bars (102), the plurality of round rods (103) are evenly divided into a group of two, and a pedal (111) is fixedly installed on opposite ends of the plurality of groups of round rods (103), two movable bars (104) are symmetrically and movably embedded inside the U-shaped groove (112), the two movable bars (104) are respectively located directly above the two movable bars (102), and the two movable bars (104) are respectively located directly above the two movable bars (102). A plurality of round rods (105) are movably embedded at equal distances on opposite sides of the second (104), and the plurality of round rods (105) are evenly divided into a group of two, and the opposite ends of the plurality of groups of round rods (105) are respectively fixedly mounted on the opposite sides of the plurality of pedals (111) near one end, and a round rod (202) is movably embedded inside the two slide grooves (101), and the outer surface of the round rod (202) is symmetrically and movably sleeved with two connecting blocks (110), and one side of the two connecting blocks (110) is respectively fixedly mounted on one side of the two movable bars (102), and a fixing plate (2) is fixedly mounted on the opposite sides of the U-shaped frame (1) near the bottom, and rollers (201) are movably sleeved on both ends of the two round rods (202).

2. A telescopic ladder for getting on and off a motorhome according to claim 1, characterized in that: An electric telescopic rod (106) is fixedly embedded at the center of one side of the U-shaped frame (1), one end of the electric telescopic rod (106) is fixedly sleeved on the outer surface of the round rod three (202), and a plurality of balls (113) are movably embedded at equal distances at the bottom of the two movable bars one (102).

3. The telescopic ladder for getting on and off a motorhome according to claim 2, characterized in that: The tops of the two arms of the U-shaped frame (1) away from the electric telescopic rod (106) are fixedly mounted with fixing bars (108), and the two fixing bars (108) are fixedly mounted with limiting rods (109) on opposite sides close to the tops.

4. The telescopic ladder for getting on and off a motorhome according to claim 3, characterized in that: The tops of the two movable bars (104) away from the fixed bar (108) are fixedly mounted with limit hooks (107), and the tops of the two U-shaped grooves (112) close to the inner wall of the fixed bar (108) are both arranged as arc surfaces.

5. The telescopic ladder for getting on and off a motorhome according to claim 4, characterized in that: The bottom of the two arms of the U-shaped frame (1) close to the fixed bar (108) are fixedly mounted with guide blocks (3), and the interiors of the two guide blocks (3) are slidably connected with sliding rods (301).

6. The telescopic ladder for getting on and off a motorhome according to claim 5, characterized in that: Limiting plates (302) are fixedly mounted on both ends of the two sliding rods (301), two guide plates (303) are symmetrically fixedly mounted on one side of one of the limiting plates (302), and the two guide plates (303) are both arranged in an inclined shape.

7. The telescopic ladder for getting on and off a motorhome according to claim 6, characterized in that: Two fixed rods (306) are symmetrically fixedly installed on opposite sides of the two movable bars (102), two push blocks (307) are symmetrically fixedly sleeved on the outer surfaces of the two fixed rods (306), and two force blocks (308) are symmetrically fixedly installed on the tops of the two limit plates (302).

8. The telescopic ladder for getting on and off a motorhome according to claim 7, characterized in that: Two vertical plates (304) are symmetrically fixedly mounted on the bottom of one of the limit plates (302), two support plates (305) are fixedly mounted on one side of the two vertical plates (304), and the plurality of support plates (305) are evenly divided into two groups, and one side of the two groups of support plates (305) is respectively fixedly mounted on the bottom inclined surfaces of the two guide plates (303).

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