Vehicle side ladder stand and vehicle

Abstract

The utility model provides a vehicle side ladder stand and a vehicle, and belongs to the technical field of vehicles, the vehicle side ladder stand comprises a side ladder stand body and an extension ladder, the side ladder stand body comprises a fixed side frame and a plurality of fixed climbing rods connected to the fixed side frame so as to meet the requirement for climbing of the upper section of the side ladder stand; a hollow cavity extending in the length direction of the fixed side frame is formed in the fixed side frame. Wherein mounting points are respectively arranged at the upper end and the lower end of the side ladder stand body, so that the side ladder stand can be integrally mounted on a vehicle body. The extension ladder comprises a movable side frame and a plurality of movable climbing rods connected to the movable side frame; and the movable side frame extends out of or retracts into the hollow cavity through the telescopic driving mechanism. The side ladder stand can be retracted into the hollow cavity of the fixed side frame through the telescopic driving mechanism, when the side ladder stand is not used, only the side ladder stand body is exposed and visible, when the side ladder stand is installed, only two points of the side ladder stand body need to be installed on a vehicle body, the side ladder stand is easy and convenient to install and detach, the appearance of the vehicle body is neat, and the appearance quality of the whole vehicle is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vehicle technical field, concretely relates to a vehicle side ladder and vehicle. BACKGROUND

[0002] The automobile side ladder is widely used on the motor home, off-road vehicle, engineering vehicle, fire vehicle, police vehicle, ambulance, oil tank vehicle and various special vehicles, and its main purpose is to facilitate the user to get on and off the roof, thereby loading, unloading goods or using the roof luggage rack and other operations, so as to meet the needs of climbing the roof for travelling, working, rescuing and the like. Generally, the vehicle chassis needs to be configured with a higher side ladder, and in order to facilitate personnel to climb, part of the side ladder is provided with a movable ladder. When in use, the movable ladder can be opened downward to extend the overall length of the side ladder, and when not in use, the movable ladder can be retracted, which does not affect the vehicle driving. However, the telescopic side ladder on the current market has some defects, which are as follows: the installation and disassembly process is complex, and the overall appearance quality of the vehicle is affected. SUMMARY

[0003] The utility model embodiment provides a kind of vehicle side ladder and vehicle, by telescopic drive mechanism, telescopic ladder is retracted into the hollow cavity of side ladder body, telescopic ladder appearance is invisible, and when installing, only need to install side ladder body, solve the problem that the installation and disassembly process of existing vehicle side ladder is complex and affects the overall appearance quality of vehicle.

[0004] To achieve the above object, the utility model adopts the technical scheme of providing a kind of vehicle side ladder, comprising:

[0005] Side ladder body, including fixed side frame and multiple fixed climbing poles connected to the fixed side frame;The fixed side frame has a hollow cavity extending along its length direction;And

[0006] Telescopic ladder, including movable side frame and multiple movable climbing poles connected to the movable side frame;The movable side frame is extended or retracted in the hollow cavity by telescopic drive mechanism, the movable climbing pole is exposed outside the fixed side frame, and parallel to the fixed climbing pole.

[0007] In combination with the first aspect, in an implementable manner, the telescopic driving mechanism comprises a telescopic driving motor, a chain gear transmission assembly and a gear rack telescopic assembly. The telescopic driving motor is installed on a fixed plate, and the fixed plate is installed on the upper end of the two fixed side frames. The chain gear transmission assembly comprises a transmission gear set, a transmission rod, a transmission sprocket set and a telescopic transmission chain. The transmission sprocket set is arranged in the hollow cavity, and the telescopic transmission chain is wound on the transmission sprocket set. The transmission rod is installed on the fixed plate, and the two ends of the transmission rod are connected to the transmission sprocket set. The transmission gear set is connected between the telescopic driving motor and the transmission rod. The power of the telescopic driving motor is transmitted to the transmission rod through the transmission gear set, and the transmission rod drives the telescopic transmission chain through the transmission sprocket set. The gear rack telescopic assembly rotates synchronously with the transmission sprocket set through a transmission shaft, and drives the telescopic ladder to extend or retract.

[0008] In combination with the first aspect, in an implementable manner, the gear rack telescopic assembly comprises a telescopic synchronous gear and a telescopic transmission rack meshing with the telescopic synchronous gear. The telescopic transmission rack is arranged in the hollow cavity. The telescopic synchronous gear is arranged on the movable side frame. The telescopic synchronous gear is connected to the transmission sprocket set through a transmission shaft and rotates synchronously with the transmission sprocket set, and drives the telescopic ladder to move along the telescopic transmission rack. The flexible transmission characteristics of the sprocket telescopic transmission chain and the precise guidance of the gear rack are combined, which can flexibly adjust the motion posture of the telescopic ladder according to the side climbing ladder curve. This not only ensures the normal operation of the telescopic ladder under complex trajectories, but also reduces the additional resistance caused by trajectory changes, reduces the load of the driving motor, and prolongs the service life of the driving mechanism.

[0009] In combination with the first aspect, in an implementable manner, the upper and lower ends of the telescopic transmission rack are respectively provided with limit blocks for stopping the telescopic synchronous gear. The limit blocks can effectively prevent the telescopic synchronous gear from over-displacement during operation, limit the activity range of the telescopic synchronous gear, and further limit the activity range of the telescopic ladder, thereby avoiding the risk of jamming failure caused by excessive retraction of the telescopic ladder, or the risk of the telescopic ladder falling off caused by excessive extension.

[0010] In combination with the first aspect, in an implementable manner, a guide strip is arranged in the hollow cavity, the telescopic transmission rack is arranged on the guide strip, the movable side frame is provided with a limiting column on the two sides facing and away from the movable climbing rod, the limiting column extends to the two sides of the guide strip, and a limiting wheel in rolling cooperation with the guide strip is arranged on the limiting column. The rolling cooperation of the limiting wheel and the guide strip reduces the friction, so that the movement of the movable side frame is more smooth, and the occurrence of jamming is avoided.

[0011] In combination with the first aspect, in an implementable mode, the telescopic synchronous gear is symmetrically provided with a guide sleeve on both axial sides, the guide sleeve is arranged on the movable side frame, the transmission shaft passes through the guide sleeve and is in clearance fit with the guide sleeve, and two limiting columns are respectively fixed on the guide sleeve. The guide sleeve has a supporting and guiding effect on the transmission shaft, the telescopic synchronous gear is rotationally connected with the movable side frame through the guide sleeve, and the limiting columns are integrated on the guide sleeve, so that the whole structure is compact.

[0012] In combination with the first aspect, in an implementable mode, a plurality of guide rollers for guiding the movement of the movable side frame are arranged in the hollow cavity, at least two guide rollers are respectively in rolling contact with two surfaces of the movable side frame that are away from and close to the vehicle body, and the guide rollers have a guiding effect on the movement of the telescopic ladder.

[0013] In combination with the first aspect, in an implementable mode, the transmission sprocket set comprises a main transmission sprocket, a guide sprocket, a movable sprocket and a slave transmission sprocket which are dispersedly arranged along the length direction of the hollow cavity; the main transmission sprocket is arranged at two ends of the transmission rod; the slave transmission sprocket is arranged at the lower end of the hollow cavity away from the transmission rod; the guide sprocket is arranged between the main transmission sprocket and the slave transmission sprocket; and the movable sprocket is coaxially arranged on the transmission shaft with the telescopic synchronous gear. The transmission sprocket set drives the power transmission structure of the gear-rack set, the structure is compact, and the side climbing ladder body can adapt to the streamline of the curved surface of the vehicle body, so that the variable trajectory power transmission is realized.

[0014] In combination with the first aspect, in an implementable mode, a chain transmission guide groove is arranged in the hollow cavity, and the guide sprocket, the slave transmission sprocket, the movable sprocket and the telescopic transmission chain are arranged in the chain transmission guide groove. The chain transmission guide groove has a limiting and guiding effect on the telescopic transmission chain, and also avoids the interference between the telescopic transmission chain and the movable side frame of the telescopic ladder. In particular, the movable sprocket is not fixed, so that the chain transmission guide groove has a limiting effect on the movable sprocket, and the risk of the movable sprocket falling off the telescopic transmission chain can be avoided.

[0015] Compared with the prior art, the vehicle side climbing ladder has the beneficial effects that:

[0016] Firstly, the installation and dismounting are simple and convenient. The movable side frame can be retracted into the hollow cavity of the fixed side frame through the telescopic driving mechanism, only the side climbing ladder body is exposed and visible, when installing, the side climbing ladder body is only needed to be installed on the vehicle body at two points, and the installation and dismounting of the side climbing ladder are simple and convenient.

[0017] Secondly, the whole vehicle appearance is neat. When not in use, the telescopic ladder is retracted into the side climbing ladder body, and when installed on the vehicle body, only the side climbing ladder body is exposed, so that the vehicle body appearance is neat and the appearance quality of the whole vehicle is improved.

[0018] Third, avoid the security risks in the driving process. In use, the telescopic ladder is extended, the overall length of the side ladder is lengthened, the telescopic ladder is retracted into the side ladder body when not in use, the overall length of the side ladder is shortened, the equipment can be more reasonably arranged in the limited space for the vehicle, the space is greatly saved, the side ladder occupies too much external space is avoided, and thus the security risks caused by the extension of the side ladder in the driving process, such as scratching caused by collision with the ground or roadside objects, and the security risks of driving not smoothly are reduced.

[0019] Fourth, the hollow cavity in the fixed side frame provides a containing space for the telescopic ladder, and the structure is compact and reasonable. The design that the movable climbing rod is exposed outside the fixed side frame and parallel to the fixed climbing rod ensures that the telescopic ladder and the fixed climbing rod can provide stable climbing support for the user when the side ladder is used. The parallel structure can uniformly distribute the force of the climber on the side ladder, and the safety and stability of climbing are increased.

[0020] Fifth, the design of the telescopic ladder also improves the versatility of the side ladder for vehicles of different heights.

[0021] Secondly, the utility model discloses a vehicle side ladder which comprises a fixed side frame, a telescopic ladder and a movable climbing rod.

[0022] The utility model discloses a vehicle, since adopted this can be retracted to the hollow cavity of fixed side frame through telescopic drive mechanism, when not using, only side ladder body is exposed and can be seen, when installing, only needs to select two points to install to the vehicle body with side ladder body, and the installation and dismounting of side ladder are simple and convenient, and also make that the appearance of vehicle body is neat, promote the appearance quality of whole vehicle, thereby can promote the brand value and market competitiveness of whole vehicle. DRAWINGS

[0023] Figure 1 A perspective structural schematic view (an appearance visible state) of the vehicle side ladder provided by the utility model embodiment;

[0024] Figure 2 A perspective structural schematic view (an inner side of the display towards the vehicle body) of the vehicle side ladder provided by the utility model embodiment;

[0025] Figure 3 A use state structural schematic view (the telescopic ladder is extended) of the vehicle side ladder provided by the utility model embodiment;

[0026] Figure 4 A front view structural schematic view (an appearance visible plan view) of the vehicle side ladder provided by the utility model embodiment;

[0027] Figure 5 For along Figure 4Cross-sectional structural view along line A-A;

[0028] Figure 6 For along Figure 4 Cross-sectional structural view along line B-B;

[0029] Figure 7 For along Figure 4 Cross-sectional structural view along line C-C;

[0030] Figure 8 The utility model discloses a three -dimensional structure schematic diagram ( show the installation position of telescopic drive motor and transmission rod in telescopic drive mechanism) of side cat ladder for vehicle provided by the embodiment of the utility model;

[0031] Figure 9 The utility model discloses a three -dimensional structure schematic diagram ( show the position relation and cooperation relation of telescopic drive mechanism and telescopic ladder) of side cat ladder for vehicle provided by the embodiment of the utility model;

[0032] Figure 10 The utility model discloses a three -dimensional structure schematic diagram ( appearance visible state) of side cat ladder body provided by the embodiment of the utility model;

[0033] Figure 11 The utility model discloses a three -dimensional structure schematic diagram ( show towards the inboard of vehicle) of side cat ladder body provided by the embodiment of the utility model;

[0034] Figure 12 The utility model discloses a three -dimensional structure schematic diagram ( appearance visible state) of side cat ladder body provided by the embodiment of the utility model;

[0035] Figure 13 For along Figure 12 Cross-sectional structural view along line D-D;

[0036] Figure 14 For along Figure 12 Cross-sectional structural view along line E-E;

[0037] Figure 15 The utility model discloses a three -dimensional structure schematic diagram ( appearance visible state) of telescopic ladder provided by the embodiment of the utility model;

[0038] Figure 16 The utility model discloses a three -dimensional structure schematic diagram ( show towards the inboard of vehicle) of telescopic ladder provided by the embodiment of the utility model;

[0039] Figure 17 The utility model discloses a three -dimensional structure schematic diagram ( appearance visible state) of telescopic ladder provided by the embodiment of the utility model;

[0040] Figure 18 For along Figure 17 Cross-sectional structural view along line F-F;

[0041] Figure 19The utility model provides a three-dimensional structure schematic diagram of the decorative cover;

[0042] Figure 20 The utility model provides a three-dimensional structure schematic diagram (telescopic ladder retracted state) of side ladder installed on the vehicle body;

[0043] Figure 21 The utility model provides a three-dimensional structure schematic diagram (telescopic ladder extended state) of side ladder installed on the vehicle body;

[0044] Mark explanation:

[0045] 100, side ladder body, 101, lower mounting seat, 102, lower fixed seat, 103, fixed climbing rod, 104, lower mounting shaft, 105, guide sliding hole, 106, hollow cavity, 107, chain transmission guide groove, 108, guide roller, 109, guide strip, 110, limit groove, 111, fixed side frame, 200, upper mounting seat, 201, protective cover, 300, fixed plate, 400, telescopic ladder, 401, movable climbing rod, 402, movable side frame, 403, guide groove, 500, decorative cover, 501, type hole, 600, telescopic drive mechanism, 601, telescopic transmission chain, 602, transmission rod, 603, main transmission sprocket, 604, guide sprocket, 605, movable sprocket, 606, slave transmission sprocket, 607, telescopic synchronous gear, 608, telescopic transmission rack, 609, limit stopper, 610, transmission shaft, 611, limit column, 612, limit wheel, 613, guide sleeve, 614, telescopic drive motor, 615, telescopic main gear, 616, telescopic slave gear. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical schemes and beneficial effects of the utility model clearer and more apparent, the utility model is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0047] At present, the side ladder installed on the vehicle body is of fixed structure, and part of the vehicle models are provided with movable ladders or sliding ladders for reducing space occupation, which aims at lengthening the overall length of the side ladder in use. However, the existing movable ladders or sliding ladders are exposed outside the side ladder body, and the side ladder is an exposed part protruding outside the vehicle body, which has visual impact on the overall vehicle and greatly affects the first impression of the user on the overall vehicle. The present application adopts the mode that the telescopic ladder is telescoped into the side ladder body, the telescopic ladder is invisible in appearance, the appearance of the side ladder is neat, a good sensory impression is given to people, and the satisfaction of the user on the overall vehicle is improved.

[0048] Please see Figures 1 to 18The utility model provides a vehicle side ladder, and the utility model discloses a vehicle side ladder which comprises a side ladder body 100 and a telescopic ladder 400, the side ladder body 100 comprises a fixed side frame 111 and a plurality of fixed climbing poles 103 connected to the fixed side frame 111, so as to meet the requirement of climbing the upper section of the side ladder, the fixed side frame 111 has a hollow cavity 106 extending along the length direction thereof, wherein the upper and lower ends of the side ladder body 100 are respectively provided with mounting points, so that the whole side ladder is mounted on the vehicle body.

[0049] Referring to Figures 3 to 10 , the telescopic ladder 400 comprises a movable side frame 402 and a plurality of movable climbing poles 401 connected to the movable side frame 402, the movable side frame 402 is extended or retracted in the hollow cavity 106 through a telescopic driving mechanism 600, the movable climbing poles 401 are exposed outside the fixed side frame 111 and are parallel to the fixed climbing poles 103, so that after the telescopic ladder 400 is extended, the climber can climb up and down by means of the movable climbing poles 401, wherein the opposite inner sides of the fixed side frame 111 are respectively provided with guide sliding holes 105 (see Figure 10 ) for the telescopic movement of the telescopic ladder 400, the two ends of the movable climbing poles 401 are connected to the movable side frame 402 and need to move synchronously with the movable side frame 402, and the guide sliding holes 105 are arranged to enable the movable climbing poles 401 to move with the movable side frame 402 without obstruction.

[0050] Combined Figures 1 to 6 , the lower end of the fixed side frame 111 is further provided with a decorative cover 500, the decorative cover 500 is provided with a type hole 501 matched with the cross section of the movable side frame 402 for the extension or retraction of the telescopic ladder 400, and for the convenience of understanding, Figure 19 a perspective view of the decorative cover 500 is given.

[0051] The utility model provides a vehicle side ladder, compared with the prior art, has the beneficial effect that:

[0052] First, the installation and removal are simple and convenient. The mounting point of the upper end of the side ladder body 100 is provided with an upper mounting seat 200, the mounting point of the lower end is provided with a lower mounting seat 101, the corresponding upper fixing seat and lower fixing seat 102 are arranged on the vehicle body, the lower end of the side ladder body 100 is fixed to the vehicle body through a lower mounting shaft 104, and the lower mounting shaft 104 penetrates the lower mounting seat 101 and the lower fixing seat 102; the upper mounting seat 200 can be fixed on the roof or the side of the vehicle body. And wherein, since the upper end of the side ladder body 100 is further provided with a fixed plate 300 for mounting the telescopic driving mechanism 600, therefore, the fixed plate 300 is fixed on the upper mounting seat 200. Due to the movable side frame 402 can be retracted into the hollow cavity 106 of the fixed side frame 111 through the telescopic driving mechanism 600, only the side ladder body 100 is exposed and visible, and when installing, only the side ladder body 100 needs to be installed on the vehicle body at two points, so that the installation and removal of the side ladder are simple and convenient.

[0053] Second, the appearance of the whole vehicle is neat. When not in use, the telescopic ladder 400 is retracted into the side ladder body 100, and when installed on the vehicle body, only the side ladder body 100 is exposed, so that the appearance of the vehicle body is neat and the appearance quality of the whole vehicle is improved.

[0054] Third, avoid safety hazards during driving. When in use, the telescopic ladder 400 is extended to lengthen the overall length of the side ladder, and when not in use, the telescopic ladder 400 is retracted into the side ladder body 100, so that the overall length of the side ladder is shortened. For vehicles, the equipment can be more reasonably arranged in limited space, greatly saving space, avoiding the occupation of too much external space by the side ladder, and thus reducing the safety hazards that may be caused by the extension of the side ladder during driving, such as scratching caused by collision with the ground or roadside objects, and the safety hazards of driving not smooth.

[0055] Fourth, the hollow cavity 106 in the fixed side frame 111 provides accommodation space for the telescopic movement of the telescopic ladder 400, and the structure is compact and reasonable. The design of the movable climbing rod 401 exposed outside the fixed side frame 111 and parallel to the fixed climbing rod 103 ensures that both the telescopic ladder 400 and the fixed climbing ladder part can provide stable climbing support for the user when the side ladder is in use. This parallel structure can evenly distribute the force of the climber on the side ladder, increasing the safety and stability of climbing.

[0056] Fifth, the design of the telescopic ladder 400 also improves the versatility of the side ladder for use on vehicles of different heights.

[0057] Sixth, the design of the telescopic ladder 400 also reduces the requirements for the use environment and space of the side ladder. When not in use, the telescopic ladder 400 is retracted, which can also reduce the wind resistance during driving.

[0058] The guide sliding hole 105 provided on the relatively inner side of the fixed side frame 111 provides guidance for the telescopic movement of the telescopic ladder 400. Since the movable side frame 402 needs to be hidden inside the fixed side frame 111, and the telescopic ladder 400 also needs to be provided with a movable climbing rod 401 for the climber to climb, the movable climbing rod 401 cannot be hidden in the hollow cavity 106. Therefore, through the setting of the guide sliding hole 105, the overall telescopic movement of the telescopic ladder 400 can be ensured, and this design can ensure that the telescopic ladder 400 moves in the correct direction during telescopic movement, avoiding deviation, jamming and other phenomena, thereby ensuring the smoothness of the telescopic action, prolonging the service life of the side ladder, and making it more convenient and fast for the user to operate the telescopic ladder 400.

[0059] In some embodiments, referring to Figures 5 to 9, the telescopic driving mechanism 600 comprises a telescopic driving motor 614, a chain gear transmission assembly and a gear rack telescopic assembly, the telescopic driving motor 614 is installed on a fixed plate 300, the fixed plate 300 is installed on the upper end of the two fixed side frames 111; wherein the fixed plate 300 also provides installation support for the chain gear transmission assembly.

[0060] Referring to Figures 5 to 9 , the chain gear transmission assembly comprises a transmission gear set, a transmission rod 602, two sets of transmission sprocket sets and two telescopic transmission chains 601; the transmission sprocket set is arranged in the hollow cavity 106, the telescopic transmission chain 601 is wound on the transmission sprocket set and extends along the length direction of the hollow cavity 106; the transmission rod 602 is installed on the fixed plate 300, the two ends of the transmission rod 602 are connected with the transmission sprocket sets; the transmission gear set is connected between the telescopic driving motor 614 and the transmission rod 602, the power of the telescopic driving motor 614 is transmitted to the transmission rod 602 through the transmission gear set, the transmission rod 602 drives the telescopic transmission chain 601 to synchronously transmit through the transmission sprocket set; the telescopic driving motor 614 is installed between the two telescopic transmission chains 601, the power can be synchronously transmitted to the telescopic transmission chain 601 through the transmission rod 602, so as to realize the synchronous movement of the two movable side frames 402, this structure is compact, has good integration and saves installation space.

[0061] In actual use, a protective cover 201 (see Figures 1 to 6 ) is arranged on the fixed plate 300, the transmission gear set, the transmission rod 602, the part of the telescopic transmission chain 601 exposed to the hollow cavity 106 and the transmission sprocket set are covered in the protective cover 201, so as to prevent damage caused by dust, rain and snow. Moreover, when the side ladder is installed as a whole, only installation points need to be arranged on the upper and lower ends of the side ladder body 100, or the installation point on the upper end of the side ladder body 100 is arranged on the fixed plate 300.

[0062] Combined with Figure 8 and Figure 9 , the transmission gear set comprises a telescopic main gear 615 and a telescopic driven gear 616 which are engaged with each other, the telescopic main gear 615 is installed on the main shaft of the telescopic driving motor 614, and the telescopic driven gear 616 is installed on the transmission rod 602.

[0063] Referring to Figures 5 to 9 , the gear rack telescopic assembly comprises a telescopic synchronous gear 607 and a telescopic transmission rack 608 which is engaged with the telescopic synchronous gear 607, the telescopic transmission rack 608 is arranged in the hollow cavity 106; the telescopic synchronous gear 607 is arranged on the movable side frame 402, the telescopic synchronous gear 607 is connected with the transmission sprocket set through a transmission shaft 610 and rotates synchronously with the transmission sprocket set, so as to drive the telescopic ladder 400 to move along the telescopic transmission rack 608.

[0064] The power transmission path of the present application is as follows: when it is necessary to extend the telescopic ladder 400, the telescopic drive motor 614 is started, and the power is transmitted to the telescopic transmission chain 601 through the transmission gear set, the transmission rod 602, and the transmission sprocket set, the telescopic transmission chain 601 drives the telescopic synchronous gear 607 to move along the telescopic transmission rack 608, achieving the purpose of extending the side ladder body 100 of the telescopic ladder 400.

[0065] The telescopic drive mechanism 600 of the present application adopts the sprocket and chain transmission and the gear and rack telescopic mode to drive the telescopic ladder 400 to move, which has the following beneficial effects: first, this mode can adapt to the variable trajectory movement of the side ladder curve, the telescopic transmission chain 601 can extend along the side ladder curve through the guidance of the sprocket, and long-distance power transmission under a curved path can be achieved, so that the sprocket telescopic drive motor 614 can be arranged at the upper end of the fixed side frame 111 or on the roof, which facilitates the installation and removal of the telescopic drive motor 614; the telescopic transmission chain 601 extends into the hollow cavity 106 and connects with the movable side frame 402 in the hollow cavity 106.

[0066] Secondly, one telescopic drive motor 614 is arranged on the fixed side frame 111, and one telescopic drive motor 614 can drive two sets of transmission sprocket sets through the transmission rod 602 to achieve synchronous transmission of the two telescopic transmission chains 601, ensuring the synchronism and stability of the telescopic movement of the movable side frame 402, and providing stable and reliable climbing support for the climber.

[0067] Thirdly, in terms of power transmission, the sprocket and chain transmission has high transmission efficiency, which can effectively transmit the power of the telescopic drive motor 614 to the gear and rack, ensuring sufficient power for the telescopic movement of the telescopic ladder 400. The engagement between the telescopic transmission chain 601 and the sprocket is tight, and slippage is not easy to occur, which makes the entire driving process more stable and reliable, and can accurately control the telescopic displacement of the telescopic ladder 400.

[0068] Fourthly, the gear and rack telescopic assembly provides accurate guidance for the telescopic movement of the telescopic ladder 400. The gear and rack have high precision, and can maintain straight-line movement during telescopic movement, effectively avoiding the instability of the telescopic ladder 400. Moreover, this structure can withstand a large load, so that the telescopic ladder 400 can still smoothly perform telescopic operation even when carrying heavy equipment or personnel.

[0069] In summary, the flexible transmission characteristics of the sprocket and chain combined with the precise guidance of the gear and rack can flexibly adjust the motion posture of the telescopic ladder 400 according to the side ladder curve. This not only ensures the normal operation of the telescopic ladder 400 under complex trajectories, but also reduces the additional resistance caused by changes in trajectory, reduces the load of the drive motor, and prolongs the service life of the drive mechanism.

[0070] The telescopic drive mechanism 600 can also adopt other technical means, for example, a fixed pulley, a movable pulley, a winding rope cooperates with lifting, the winding rope is connected with the movable side frame 402 of the telescopic ladder 400, the movement of the movable side frame 402 is realized, the guide bar 109 is arranged in the hollow cavity 106, the slider cooperates with the guide bar 109 and is arranged on the movable side frame 402, and the movement of the telescopic ladder 400 is guided; a linear driver such as an electric push rod, a pneumatic support rod or a hydraulic support rod is used to realize the telescopic movement of the telescopic ladder 400, and the slider cooperates with the guide bar 109 to guide the movement of the telescopic ladder 400.

[0071] In some embodiments, referring to Figure 5 and Figure 6 , the telescopic synchronous gear 607 is arranged at the upper end of the movable side frame 402, and the upper and lower ends of the telescopic transmission rack 608 are respectively provided with limit blocks 609 for stopping the telescopic synchronous gear 607. The limit blocks 609 can effectively prevent the telescopic synchronous gear 607 from over-displacement during the operation, limit the movement range of the telescopic synchronous gear 607, and further limit the movement range of the telescopic ladder 400, thereby avoiding the risk of jamming failure caused by excessive retraction of the telescopic ladder 400 or the risk of the telescopic ladder 400 falling off caused by excessive extension. Specifically, when the movable side frame 402 moves, the telescopic synchronous gear 607 interacts with the telescopic transmission rack 608, the limit block 609 at the upper end of the telescopic transmission rack 608 can prevent the telescopic synchronous gear 607 from being separated from the constraint of the telescopic transmission rack 608 upward, thereby avoiding the telescopic ladder 400 from being excessively retracted; the limit block 609 at the lower end of the telescopic transmission rack 608 can prevent the telescopic ladder 400 from being separated from the telescopic transmission rack 608 downward and from the side ladder body 100.

[0072] In some embodiments, referring to Figure 7 , the guide bar 109 is arranged in the hollow cavity 106, the telescopic transmission rack 608 is fixed on the guide bar 109, the movable side frame 402 is provided with a limiting column 611 on the two sides thereof which faces and is away from the movable ladder 401, and the limiting column 611 is provided with a limiting wheel 612 which rolls with the guide bar 109. The main function of this embodiment is to limit the movement track of the telescopic synchronous gear 607 through the limiting column 611 on the two sides of the movable side frame 402, to ensure that the telescopic synchronous gear 607 moves along the telescopic transmission rack 608, to ensure that the movable side frame 402 moves along the telescopic transmission rack 608, to avoid that the telescopic synchronous gear 607 deviates from the movement track of the telescopic transmission rack 608, thereby avoiding the problem of deflection of the telescopic ladder 400 during telescopic movement, and to ensure the safety and reliability of the entire device during operation. The rolling cooperation between the limiting wheel 612 and the guide bar 109 reduces the friction, so that the movement of the movable side frame 402 is more smooth, and the jamming phenomenon is avoided.

[0073] For the sake of clarity, the two sides of the movable side frame 402 towards and away from the movable climbing pole 401 are explained as follows: when the side climbing ladder is installed on the right side of the vehicle body, the two sides of the movable side frame 402 towards and away from the movable climbing pole 401 are the front side and the rear side of the movable side frame 402 respectively. Since the two movable side frames 402 in front and rear have two sides away from and towards the movable climbing pole 401, the limiting columns 611 are arranged on the two sides of the movable side frame 402, which is clear and definite.

[0074] In some embodiments, referring to Figure 7 The axial two sides of the telescopic synchronous gear 607 are symmetrically provided with guide sleeves 613, the guide sleeves 613 are arranged on the movable side frame 402, the transmission shaft 610 passes through the guide sleeves 613 and is in clearance fit with the guide sleeves 613, and the two limiting columns 611 are fixed on the guide sleeves 613 respectively. The guide sleeves 613 have a supporting and guiding effect on the transmission shaft 610, the telescopic synchronous gear 607 is rotationally connected with the movable side frame 402 through the guide sleeves 613, and the limiting columns 611 are integrated on the guide sleeves 613, so that the whole structure is compact.

[0075] Optionally, referring to Figure 7 The guide strip 109 is a T-shaped slide rail, the two sides of the T-shaped slide rail form limiting grooves 110, and the limiting wheels 612 are located in the limiting grooves 110 and in rolling fit with the inner walls of the limiting grooves 110. The cooperation structure of the T-shaped slide rail and the limiting wheels 612 has many advantages. First, the limiting grooves 110 on the two sides of the T-shaped slide rail have a precise limiting effect on the limiting wheels 612, which can effectively prevent the limiting wheels 612 from deviating laterally in the running process, thereby ensuring the stability of the running, finally ensuring that the telescopic ladder 400 will not deviate in the running process, ensuring that the movable climbing pole 401 on the telescopic ladder 400 will not tilt, and ensuring the safety and reliability of the climber; second, the rolling fit reduces the friction, compared with the traditional sliding friction structure, can reduce energy consumption, improve the operation efficiency of the equipment, and reduce the wear of the parts, prolong the service life of the guide strip 109 and the limiting wheels 612, and reduce the maintenance cost of the equipment.

[0076] In some embodiments, referring to Figure 5 and Figure 6The hollow cavity 106 is provided with a plurality of guide rollers 108 for guiding the movement of the movable side frame 402, wherein at least two guide rollers 108 are in rolling contact with the two surfaces of the movable side frame 402 facing and away from the vehicle body, and the guide rollers 108 guide the movement of the telescopic ladder 400. Since the movable side frame 402 needs to be extended and retracted, there must be a gap between the movable side frame 402 and the inner wall of the hollow cavity 106 to avoid the phenomenon that the movable side frame 402 is stuck and not smooth. The existence of the gap will also cause the movable side frame 402 to deviate and tilt during movement, and other unstable factors. Therefore, the guide rollers 108, the limiting columns 611 and the limiting wheels 612 are arranged in the hollow cavity 106 to limit the movement of the movable side frame 402 in four directions.

[0077] For a clearer understanding, the following is an example: when the side ladder is installed on the right side of the vehicle body, the two limiting wheels 612 are arranged on the front and rear sides of the movable side frame 402, and the at least two guide rollers 108 are arranged on the left and right sides of the movable side frame 402, that is, one guide roller 108 contacts the left side of the movable side frame 402 close to the vehicle body, and one guide roller 108 contacts the right side of the movable side frame 402 away from the vehicle body. In this way, the movement trajectory of the movable side frame 402 is limited from front to back and left to right, ensuring that the telescopic ladder 400 is extended, the movable side frame 402 remains parallel to the side ladder body 100, and the movable climbing rod 401 remains horizontal and parallel to the fixed climbing rod 103. In this way, when the climber steps on the movable climbing rod 401, the climber can step stably, ensuring the safety of the climber.

[0078] Of course, the side ladder can also be installed on the left side and the rear of the vehicle body, and is not limited to the right side of the vehicle body.

[0079] In some embodiments, as shown in Figure 18 The surface of the movable side frame 402 is provided with a guide groove 403 for the guide rollers 108, which can ensure that the guide rollers 108 stably roll in the guide groove 403 and reduce the possibility of shaking and deviation.

[0080] Optionally, a buffer block (not shown in the figure) is further arranged at both ends of the guide groove 403, which can prevent the guide rollers 108 from sliding out of the guide groove 403 when the guide rollers 108 roll to the positions close to the two ends.

[0081] In some embodiments, as shown in Figure 6 , Figure 8 , Figure 9 and Figure 13The transmission sprocket set comprises a main transmission sprocket 603, a guide sprocket 604, a movable sprocket 605 and a slave transmission sprocket 606 which are dispersedly arranged along the length direction of the hollow cavity 106; the main transmission sprocket 603 is arranged at both ends of the transmission rod 602; the slave transmission sprocket 606 is arranged at the lower end of the hollow cavity 106 away from the transmission rod 602; the movable sprocket 605 is coaxially arranged on the transmission shaft 610 with the telescopic synchronous gear 607. The guide sprocket 604 is arranged between the main transmission sprocket 603 and the slave transmission sprocket 606, and is dispersedly arranged along the movement track of the telescopic transmission chain. The guide sprocket 604 guides the telescopic transmission chain, especially when the transmission track is curved, the telescopic transmission chain needs to be guided by the guide sprocket 604 to bend along the movement track. The coaxial arrangement of the telescopic synchronous gear 607 and the guide sprocket 604 can better realize force transmission and synchronization during transmission. When the power is transmitted to the main transmission sprocket 603 through the transmission rod 602, the main transmission sprocket 603 drives the telescopic transmission chain 601 to transmit, the telescopic transmission chain 601 drives the guide sprocket 604, the movable sprocket 605 and the slave transmission sprocket 606 to rotate, and the rotation of the movable sprocket 605 drives the transmission shaft 610 to rotate, and the transmission shaft 610 drives the telescopic synchronous gear 607 to rotate along the telescopic transmission rack 608, realizing the telescopic action of the telescopic ladder 400.

[0082] The guide sprocket 604 is rotatably connected in the hollow cavity 106, and the movable sprocket 605 rotates with the telescopic transmission chain 601 and synchronously moves with the transmission shaft 610 and the dynamic side frame 402.

[0083] The cooperation mode of the transmission sprocket set and the gear and rack telescopic assembly can effectively improve the stability and accuracy of transmission. The main transmission sprocket 603 is located at both ends of the transmission rod 602, which can balance the transmission of power and ensure that the force is evenly distributed during transmission, reducing the situation that the local force is too large. The guide sprocket 604 and the telescopic synchronous gear 607 are coaxially arranged on the transmission shaft 610, which can accurately guide the movement direction of the telescopic transmission chain 601, so that the telescopic transmission chain 601 can run according to the predetermined track during transmission, avoiding problems such as chain breakage or chain jamming. The slave transmission sprocket 606 is arranged at the lower end of the hollow cavity 106 away from the transmission rod 602, which cooperates with the main transmission sprocket 603 and the guide sprocket 604 to support and guide the telescopic transmission chain 601 at different positions, further optimizing the transmission efficiency of the entire transmission sprocket set. Moreover, such dispersed arrangement can also adapt to the space structure inside the hollow cavity 106, reasonably utilize the space and reduce the possibility of mutual interference between the sprockets, thereby prolonging the service life of the entire transmission sprocket set and improving the reliability and continuity of equipment operation.

[0084] The side ladder body 100 in the present application has an arc-shaped curved design, so that the side ladder body 100 can adapt to the streamline of the curved surface of the vehicle body, and the upper end of the side ladder body 100 is extended to the roof through bending, thereby facilitating the arrangement of the telescopic drive motor 614 and the chain gear transmission assembly. Therefore, the hollow cavity 106 is also designed in an arc-shaped curved manner, and a plurality of guide sprockets 604 are arranged in the hollow cavity 106, which can accurately guide the running direction of the telescopic transmission chain 601 and prevent the telescopic transmission chain 601 from being misaligned or relaxed during transmission.

[0085] The power transmission structure of the transmission sprocket driving gear rack has a compact structure, and the components interact, correlate and restrict each other. The telescopic synchronous gear 607 can accurately perform synchronous movement according to the rotation state of the movable sprocket 605, thereby ensuring that the entire transmission sprocket set stably and efficiently operates in the hollow cavity 106. This layout not only improves the transmission efficiency, but also reduces the risk of failure due to improper cooperation of transmission components, thereby laying a solid foundation for stable operation of the entire device.

[0086] In some embodiments, referring to Figure 6 and Figure 13 , the hollow cavity 106 is provided with a chain transmission guide groove 107, and the guide sprocket 604, the transmission sprocket 606, the movable sprocket 605 and the telescopic transmission chain 601 are arranged in the chain transmission guide groove 107, so that the telescopic transmission chain 601 is transmitted along the chain transmission guide groove 107, and the telescopic transmission chain 601 is limited and guided, and interference between the telescopic transmission chain 601 and the movable side frame 402 of the telescopic ladder 400 is avoided. In particular, the movable sprocket 605 is not fixed, so that the chain transmission guide groove 107 has a limiting effect on the movable sprocket 605, thereby avoiding the risk of the movable sprocket 605 falling off the telescopic transmission chain 601.

[0087] In the above embodiments, the description of each embodiment focuses on different aspects, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0088] Based on the same inventive concept, the embodiments of the present application also provide a vehicle comprising a vehicle side ladder. The vehicle side ladder is applied to vehicles including but not limited to motor homes, off-road vehicles, engineering vehicles, fire vehicles, police vehicles, ambulances, tank vehicles and various special vehicles. Figure 20 and Figure 21 show the perspective structural schematic diagram of the side ladder installed on the vehicle body, wherein Figure 20 shows the state that the telescopic ladder 400 is retracted into the side ladder body 100, Figure 21 shows the state that the telescopic ladder 400 is extended out of the side ladder body 100.

[0089] The utility model embodiment further provides a kind of vehicle, due to adopting this can be retracted into the hollow cavity of fixed side frame by telescopic drive mechanism, when not using, only side ladder body is exposed visible, when installing, only need to install side ladder body to the vehicle body on two points can be selected, the installation and disassembly of side ladder are simple and convenient, and also make the appearance neat of vehicle body, improve the appearance quality of whole car, to be able to improve the brand value and market competitiveness of whole car.

[0090] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A side ladder for a vehicle, characterized by, The utility model relates to a telescopic ladder, which comprises a fixed side frame (111) and a plurality of fixed climbing poles (103) connected to the fixed side frame (111), wherein the fixed side frame (111) has a hollow cavity (106) extending along the length direction thereof; and a telescopic ladder (400) comprising a movable side frame (402) and a plurality of movable climbing poles (401) connected to the movable side frame (402), wherein the movable side frame (402) is extended or retracted in the hollow cavity (106) through a telescopic drive mechanism (600), and the movable climbing poles (401) are exposed outside the fixed side frame (111) and parallel to the fixed climbing poles (103). The telescopic drive mechanism (600) comprises a telescopic drive motor (614), a chain gear transmission assembly and a gear rack telescopic assembly, wherein the telescopic drive motor (614) is installed on a fixed plate (300), and the fixed plate (300) is installed on the upper end of the fixed side frame (111). The chain gear transmission assembly comprises a transmission gear set, a transmission rod (602), a transmission sprocket set and a telescopic transmission chain (601), wherein the transmission sprocket set is arranged in the hollow cavity (106), the telescopic transmission chain (601) is wound on the transmission sprocket set, and the transmission rod (602) is installed on the fixed plate (300) and connected to the transmission sprocket set at both ends. The transmission gear set is connected between the telescopic drive motor (614) and the transmission rod (602), the power of the telescopic drive motor (614) is transmitted to the transmission rod (602) through the transmission gear set, and the transmission rod (602) drives the telescopic transmission chain (601) to transmit through the transmission sprocket set.

2. The automotive side step as set forth in claim 1, characterized in that, The gear rack telescopic assembly rotates synchronously with the transmission sprocket set through a transmission shaft (610) to drive the telescopic ladder (400) to extend or retract. The gear rack telescopic assembly comprises a telescopic synchronous gear (607) and a telescopic transmission rack (608) engaged with the telescopic synchronous gear (607), wherein the telescopic transmission rack (608) is arranged in the hollow cavity (106), the telescopic synchronous gear (607) is arranged on the movable side frame (402), and the telescopic synchronous gear (607) is connected to the transmission sprocket set through the transmission shaft (610). The upper and lower ends of the telescopic transmission rack (608) are respectively provided with limit stop blocks (609) for stopping the telescopic synchronous gear (607). The hollow cavity (106) is provided with a guide strip (109), and the telescopic transmission rack (608) is arranged on the guide strip (109); the movable side frame (402) is respectively provided with limit posts (611) on the two sides facing and away from the movable climbing poles (401), and the limit posts (611) are provided with limit wheels (612) rolling with the guide strip (109).

3. The vehicle side step, as claimed in claim 2, wherein, ​ 4. The vehicle side step, as claimed in claim 3, wherein, ​ 5. The vehicle side step, as claimed in claim 3, wherein, ​ 6. The vehicle side-climbing step according to claim 5, wherein The telescopic synchronous gear (607) is symmetrically provided with guide sleeves (613) on both axial sides, the guide sleeves (613) are arranged on the movable side frame (402), the transmission shaft (610) passes through the guide sleeves (613) and is in clearance fit with the guide sleeves (613), and the two limiting columns (611) are respectively fixed on the guide sleeves (613).

7. The vehicle side climb-in of claim 3 wherein, A plurality of guide rollers (108) for guiding the movement of the movable side frame (402) are arranged in the hollow cavity (106), wherein at least two guide rollers (108) are respectively in rolling contact with two surfaces of the movable side frame (402) facing the vehicle body and away from the vehicle body.

8. A vehicle side step as claimed in any one of claims 3 to 7, characterised in that, The transmission sprocket set comprises a main transmission sprocket (603), a guide sprocket (604), a movable sprocket (605) and a slave transmission sprocket (606) which are dispersedly arranged along the length direction of the hollow cavity (106); the main transmission sprocket (603) is arranged at both ends of the transmission rod (602); the slave transmission sprocket (606) is arranged at the lower end of the hollow cavity (106) away from the transmission rod (602); the guide sprocket (604) is arranged between the main transmission sprocket (603) and the slave transmission sprocket (606); and the movable sprocket (605) is coaxially arranged on the transmission shaft (610) with the telescopic synchronous gear (607).

9. The vehicle side climber as set forth in claim 8, wherein A chain transmission guide groove (107) is arranged in the hollow cavity (106), and the guide sprocket (604), the slave transmission sprocket (606), the movable sprocket (605) and the telescopic transmission chain (601) are all arranged in the chain transmission guide groove (107).

10. A vehicle characterized by comprising: A side ladder for a vehicle comprising any one of claims 1-9.

Images