Underframe device and aerial work vehicle

Abstract

The present invention discloses an undercarriage device and an aerial work vehicle, comprising: an undercarriage; a crawler running mechanism disposed on both sides of the undercarriage; a crawler lifting mechanism connected between the undercarriage and the crawler running mechanism and configured to drive the crawler running mechanism to lift or lower; a plurality of legs disposed on the undercarriage so as to be able to pitch up and down; and a leg driving mechanism connected between the undercarriage and the legs and configured to drive the legs to pitch up and down so as to land or lift off the ground. The undercarriage device integrates the crawler running mechanism and the plurality of legs into the undercarriage, and utilizes the crawler lifting mechanism and the leg driving mechanism to achieve switching of the crawler running mechanism and the legs to the ground, thereby greatly improving the adaptability of the undercarriage device to the work site and the operational stability.

Description

Technical Field

[0001] The present invention relates to the technical field of aerial work equipment, and more specifically, to an underframe device. In addition, the present invention also relates to an aerial work vehicle comprising the above-mentioned underframe device. Background Art

[0002] The aerial work platform in the prior art adopts a wheeled chassis, which is only applicable to a limited number of working sites and cannot be adapted to complex sites. Moreover, the operating stability is poor, making it inconvenient to operate on slopes or in sites with loose soil.

[0003] Therefore, how to provide a chassis device that can adapt to complex sites and has good stability is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a chassis device that can adapt to complex sites and has good stability.

[0005] Another object of the present invention is to provide an aerial work vehicle including the above-mentioned underframe device, which can adapt to complex sites and ensure stable operation.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A chassis device, comprising:

[0008] chassis;

[0009] crawler walking mechanism, arranged on both sides of the chassis;

[0010] A crawler lifting mechanism, connected between the chassis and the crawler traveling mechanism, for driving the crawler traveling mechanism to lift or lower;

[0011] A plurality of legs are provided on the base frame so as to be able to pitch up and down;

[0012] The leg driving mechanism is connected between the base frame and the legs, and is used to drive the legs to pitch up and down so that the legs touch the ground or leave the ground.

[0013] Optionally, the supporting legs can be arranged on the base frame in a bidirectionally rotatable manner along the horizontal direction.

[0014] Optionally, the base frame is provided with a leg mounting seat that can rotate in both directions in the horizontal direction, the leg is connected to the leg mounting seat via a first pin shaft, and both ends of the leg driving mechanism are hinged to the leg and the leg mounting seat respectively.

[0015] Optionally, the leg mounting seat is connected to the base frame via a second pin shaft, and the leg mounting seat is provided with a plurality of first limiting holes with different angles along the circumference of the second pin shaft; the base frame is provided with a limiting pin that is pluggable and selectively cooperates with the first limiting hole.

[0016] Optionally, the chassis is provided with:

[0017] The upper ear plate is provided with a second limiting hole, and the second limiting hole is a special-shaped hole;

[0018] The limiting plate is provided with a third limiting hole;

[0019] The lower ear plate is provided with a fourth limiting hole, the limiting plate is provided between the upper ear plate and the lower ear plate, the center lines of the second limiting hole, the third limiting hole and the fourth limiting hole are collinear; the first limiting hole is located between the limiting plate and the lower ear plate;

[0020] The limiting pin is passed through the second limiting hole, the third limiting hole and the fourth limiting hole, and the outer periphery of the limiting pin is provided with:

[0021] The first limiting portion is located between the upper ear plate and the limiting plate, and when rotated to a preset position, can pass through the second limiting hole; when rotated to a position offset from the preset position, the first limiting portion and the upper ear plate are stopped and limited;

[0022] The second limiting portion is located between the upper ear plate and the limiting plate, and is used to prevent the limiting pin from being separated from the base frame.

[0023] Optionally, the second limiting hole includes a middle circular hole and two strip-shaped holes respectively connected to the middle circular hole and symmetrically arranged with respect to the middle circular hole;

[0024] The first limiting portion and the second limiting portion are both bar-shaped columns, the length of the first limiting portion is less than the maximum length of the second limiting hole and greater than the aperture of the middle circular hole; the length of the second limiting portion is greater than the maximum length of the second limiting hole.

[0025] Optionally, the support leg mounting seat is provided with a stop block, and the limit plate is provided with a limit protrusion for cooperating with the stop block to limit the position.

[0026] Optionally, the support leg is provided with a protective plate for protecting the support leg driving mechanism.

[0027] Optionally, the chassis is provided with a slidable crawler lifting frame, the crawler walking mechanism is connected to the crawler lifting frame, and the crawler lifting mechanism is connected between the crawler lifting frame and the chassis.

[0028] An aerial work vehicle comprises any one of the above-mentioned underframe devices.

[0029] The undercarriage device provided by the present invention, when working, when it is necessary to make the undercarriage device move, the crawler lifting mechanism is used to drive the crawler walking mechanism to descend, so that the crawler walking mechanism touches the ground; and the support leg driving mechanism is used to drive the support legs to lift upward, so that the support legs are off the ground; at this time, the crawler walking mechanism can be used to make the undercarriage device move on the ground. The crawler walking mechanism is flexible and maneuverable, can adapt to complex sites, and is conducive to making the undercarriage device move or be transported on slopes or sites with loose soil.

[0030] When the chassis device needs to be stopped for operation, the leg driving mechanism is used to drive the legs to extend downward so that the legs touch the ground; and the crawler lifting mechanism is used to drive the crawler walking mechanism to lift so that the crawler walking mechanism is off the ground; at this time, several legs are used to support the chassis device on the ground. It can be understood that several legs form at least three-point support, which can stably support the chassis device on the ground, which is beneficial to improving operation stability.

[0031] It can be seen that the chassis device integrates the crawler walking mechanism and several legs into the chassis, and uses the crawler lifting mechanism and the leg driving mechanism to realize the switching landing of the crawler walking mechanism and the legs, thereby greatly improving the adaptability and operation stability of the chassis device in the working site.

[0032] The aerial work vehicle provided by the present invention includes the above-mentioned underframe device and has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0034] Figure 1 A schematic structural diagram of a chassis device provided in a specific embodiment of the present invention;

[0035] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0036] Figure 3 Schematic diagram of the structure of the chassis;

[0037] Figure 4 for Figure 3 A partial enlarged view of B in the middle;

[0038] Figure 5 Schematic diagram of the structure of the upper ear plate;

[0039] Figure 6 Schematic diagram of the structure of the limiting plate;

[0040] Figure 7 This is a structural diagram of the front leg mounting base;

[0041] Figure 8 This is a structural diagram of the rear leg mounting base;

[0042] Figure 9 Schematic diagram of the structure after the limiting pin is pulled out from the first limiting hole and the fourth limiting hole;

[0043] Figure 10 for Figure 9 A structural diagram from another perspective;

[0044] Figure 11 A schematic structural diagram of a limit pin in one embodiment;

[0045] Figure 12 for Figure 11 Exploded diagram;

[0046] Figure 13 A schematic structural diagram of a limit pin in another embodiment;

[0047] Figure 14 Schematic diagram of the structure of the legs;

[0048] Figure 15 It is a structural diagram of the crawler lifting frame;

[0049] Figure 16 for Figure 15 A structural diagram from another perspective.

[0050] Figures 1 to 16 The reference numerals in the figures are as follows:

[0051] 1 is the chassis, 11 is the second pin, 12 is the upper ear plate, 121 is the second limiting hole, 1211 is the middle round hole, 1212 is the strip hole, 13 is the limiting plate, 131 is the third limiting hole, 132 is the limiting protrusion, 14 is the lower ear plate, 141 is the fourth limiting hole, 15 is the third pin, 2 is the crawler walking mechanism, 3 is the crawler lifting mechanism, 4 is the support leg, 41 is the first rectangular tube, 42 is the second rectangular tube, 43 is the reinforcement plate, 44 is the connecting plate, 45 is the ear plate, 46 is the first shaft sleeve, 47 is the ear seat, 48 is the sixth pin, 491 is the first bearing, 492 is the second bearing, 5 is the support leg drive mechanism, 6 is the support leg mounting seat, 6 1 is the first pin shaft, 62 is the first limiting hole, 63 is the stop block, 64 is the first side plate, 65 is the upper plate, 66 is the lower plate, 67 is the third sleeve, 68 is the fifth pin shaft, 69 is the fourth sleeve, 7 is the limiting pin, 71 is the first limiting part, 711 is the first hollow pin, 712 is the first steel ball quick release pin, 72 is the second limiting part, 721 is the second hollow pin, 722 is the second steel ball quick release pin, 73 is the pin shaft body, 74 is the pull ring, 75 is the third hollow pin, 8 is the protective plate, 9 is the crawler lifting frame, 91 is the third rectangular tube, 92 is the second side plate, 93 is the second sleeve, 94 is the mounting plate, 95 is the fourth pin shaft, and 10 is the support leg foot plate. DETAILED DESCRIPTION

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0053] The core of the present invention is to provide an underframe device that can adapt to complex sites and has good stability. Another core of the present invention is to provide an aerial work vehicle including the above-mentioned underframe device, which can adapt to complex sites and ensure stable operation.

[0054] Please refer to Figures 1-16 An embodiment of the present invention provides an undercarriage device, comprising an undercarriage 1, a crawler track mechanism 2, a crawler track lifting mechanism 3, a plurality of legs 4, and a leg driving mechanism 5. The crawler track mechanism 2 is disposed on both sides of the undercarriage 1; the crawler track lifting mechanism 3 is connected between the undercarriage 1 and the crawler track mechanism 2 and is used to drive the crawler track mechanism 2 to rise or fall; the legs 4 are disposed on the undercarriage 1 so as to be able to pitch up and down; the leg driving mechanism 5 is connected between the undercarriage 1 and the legs 4 and is used to drive the legs 4 to pitch up and down so that the legs 4 touch or leave the ground.

[0055] During operation, when the chassis device needs to move, the crawler lifting mechanism 3 is used to drive the crawler walking mechanism 2 to descend, so that the crawler walking mechanism 2 touches the ground; and the support leg driving mechanism 5 is used to drive the support legs 4 to lift upward, so that the support legs 4 leave the ground; at this time, the crawler walking mechanism 2 can be used to make the chassis device walk on the ground. The crawler walking mechanism 2 is flexible and maneuverable and can adapt to complex sites, which is conducive to making the chassis device walk or transport on slopes or loose soil sites.

[0056] When the chassis device needs to be stopped for operation, the leg driving mechanism 5 is used to drive the legs 4 to extend downward so that the legs 4 touch the ground; and the crawler lifting mechanism 3 is used to drive the crawler walking mechanism 2 to lift so that the crawler walking mechanism 2 is off the ground; at this time, several legs 4 are used to support the chassis device on the ground. It can be understood that several legs 4 form at least three-point support, which can stably support the chassis device on the ground, which is conducive to improving operation stability.

[0057] It can be seen that the chassis device integrates the crawler walking mechanism 2 and several legs 4 into the chassis 1, and uses the crawler lifting mechanism 3 and the leg driving mechanism 5 to realize the switching landing of the crawler walking mechanism 2 and the legs 4, thereby greatly improving the adaptability and operation stability of the chassis device in the working site.

[0058] In order to improve the stability of the legs 4 when they are on the ground, in some embodiments, the legs 4 are arranged on the base frame 1 so as to be rotatable in both directions in the horizontal direction. In other words, in this embodiment, the legs 4 can not only perform up and down pitching movements, but can also rotate in the horizontal direction. In this way, by rotating the legs 4 in the horizontal direction, the legs 4 can be placed in a suitable landing position, which helps to make the legs 4 more stably supported on the ground.

[0059] It should be noted that the horizontal direction in the embodiment of the present invention is relative to the ground. If the ground is a slope, the horizontal direction is the inclined direction parallel to the slope.

[0060] In addition, this embodiment does not limit the specific connection method between the legs 4 and the base frame 1, as long as the movement of the legs 4 can be guaranteed.

[0061] In some embodiments, the base frame 1 is provided with a leg mounting base 6 that is capable of bidirectional horizontal rotation. The leg 4 is connected to the leg mounting base 6 via a first pin 61. The two ends of the leg driving mechanism 5 are respectively hinged to the leg 4 and the leg mounting base 6. In other words, in this embodiment, the leg 4 is mounted to the base frame 1 via the leg mounting base 6. When the leg driving mechanism 5 is activated, the leg 4 rotates relative to the leg mounting base 6, thereby achieving up and down pitch motion of the leg 4. In addition, the rotation of the leg mounting base 6 relative to the base frame 1 enables the leg 4 to rotate in both directions in the horizontal direction. In other words, the addition of the leg mounting base 6 facilitates the installation of the leg 4 and the base frame 1.

[0062] Furthermore, in some embodiments, the leg mounting base 6 is connected to the base frame 1 via a second pin 11. The leg mounting base 6 is provided with a plurality of first limiting holes 62 arranged at different angles along the circumference of the second pin 11. The base frame 1 is provided with a pluggable limiting pin 7 that selectively engages with the first limiting holes 62. It is understood that when the limiting pin 7 is removed from the first limiting hole 62, the leg mounting base 6 can be rotated horizontally relative to the base frame 1 about the second pin 11. By rotating the leg mounting base 6 about the second pin 11, one of the first limiting holes 62 at different angles can be selectively aligned with the limiting pin 7. When the limiting pin 7 is inserted into the aligned first limiting hole 62, the leg mounting base 6 is restricted and fixed in a suitable position. This allows the leg mounting base 6 to be horizontally restricted at different angles, thereby enabling the horizontal rotation and limiting of the leg 4.

[0063] Furthermore, in some embodiments, the chassis 1 is provided with an upper ear plate 12, a lower ear plate 14 and a limiting plate 13, the limiting plate 13 is provided between the upper ear plate 12 and the lower ear plate 14, the upper ear plate 12 is provided with a second limiting hole 121, and the second limiting hole 121 is a special-shaped hole; the limiting plate 13 is provided with a third limiting hole 131; the lower ear plate 14 is provided with a fourth limiting hole 141, and the center lines of the second limiting hole 121, the third limiting hole 131 and the fourth limiting hole 141 are collinear; wherein, the first limiting hole 62 on the support leg mounting seat 6 is located between the limiting plate 13 and the lower ear plate 14; the limiting hole 63 is provided with a third limiting hole 131; the lower ear plate 14 is provided with a fourth limiting hole 141; ... the first limiting hole 62 on the support leg mounting seat 6 is located between the limiting plate 13 and the lower ear plate 14; the limiting hole 63 is provided with a third limiting hole 131; the lower ear plate 14 is provided with a fourth limiting hole 141; the The positioning pin 7 is passed through the second limiting hole 121, the third limiting hole 131 and the fourth limiting hole 141. The outer periphery of the limiting pin 7 is provided with a first limiting portion 71 and a second limiting portion 72. The first limiting portion 71 is located between the upper ear plate 12 and the limiting plate 13. When the first limiting portion 71 rotates to a preset position, it can pass through the second limiting hole 121; when the first limiting portion 71 rotates to a staggered preset position, the first limiting portion 71 and the upper ear plate 12 are stopped and limited; the second limiting portion 72 is located between the upper ear plate 12 and the limiting plate 13, and is used to prevent the limiting pin 7 from detaching from the base frame 1.

[0064] That is to say, the limiting pin 7 is installed and limited on the bracket by passing through the second limiting hole 121, the third limiting hole 131 and the fourth limiting hole 141; it can be understood that the limiting pin 7 is respectively matched with the second limiting hole 121, the third limiting hole 131 and the fourth limiting hole 141, so that the limiting pin 7 can be plugged in and rotated; when it is necessary to adjust the rotation angle of the support leg 4 in the horizontal direction, the limiting pin 7 is rotated to rotate the first limiting portion 71 to the preset position, and then the limiting pin 7 is pulled to make the first limiting portion 71 pass through the second limiting hole 121, and the limiting pin 7 is moved from the first limiting hole 62 and the fourth limiting hole 1 41 is pulled out; at this time, the limit of the limit pin 7 on the support leg mounting seat 6 is released, and the support leg mounting seat 6 can be rotated. By rotating the support leg mounting seat 6, the first limit hole 62 corresponding to the required angle on the support leg mounting seat 6 is aligned with the second limit hole 121, the third limit hole 131 and the fourth limit hole 141; then, the first limit part 71 of the limit pin 7 is rotated to the preset position, so that the first limit part 71 can pass through the second limit hole 121, so that the limit pin 7 can be inserted into the first limit hole 62 and the fourth limit hole 141; the limit pin 7 on the support leg mounting seat 6 is realized, and the angle adjustment of the support leg mounting seat 6 along the horizontal direction is completed.

[0065] During this process, when the limit pin 7 is pulled to make the first limit part 71 pass through the second limit hole 121, and after the limit pin 7 is pulled out from the first limit hole 62 and the fourth limit hole 141, the first limit part 71 can be rotated to deviate from the preset position by rotating the limit pin 7, that is, the first limit part 71 is staggered from the preset position. At this time, the first limit part 71 cannot pass through the second limit hole 121. The first limit part 71 is mounted on the upper ear plate 12 and is limited by the upper ear plate 12 to prevent the limit pin 7 from falling during the rotation of the leg mounting seat 6, thereby affecting the rotation of the leg mounting seat 6. In addition, it can be understood that when the limit pin 7 is pulled so that the first limit portion 71 passes through the second limit hole 121, and the limit pin 7 is pulled out from the first limit hole 62 and the fourth limit hole 141, the second limit portion 72 cannot pass through the second limit hole 121, thereby preventing the limit pin 7 from being separated from the base frame 1 when the limit pin 7 is pulled out.

[0066] It should be noted that the present embodiment does not limit the specific shape of the second limiting hole 121. It is sufficient as long as the second limiting hole 121 is made into a special shape so that when the first limiting portion 71 is rotated to the preset position, it can pass through the second limiting hole 121, but when it is offset from the preset position, it cannot pass through the second limiting hole 121. For example, the shape of the first limiting portion 71 can be the same as the shape of the second limiting hole 121, both being special shapes. In this way, when the first limiting portion 71 and the second limiting hole 121 are completely aligned, the shapes of the first limiting portion 71 and the second limiting hole 121 completely match, allowing the first limiting portion 71 to pass through the second limiting hole 121. When the first limiting portion 71 and the second limiting hole 121 are offset by a certain angle, the first limiting portion 71 is restricted by the special shape and cannot pass through the second limiting hole 121.

[0067] Considering the simplicity of the structure and ease of implementation, in some embodiments, the second limiting hole 121 includes a central circular hole 1211 and two bar-shaped holes 1212 respectively connected to the central circular hole 1211 and symmetrically arranged with respect to the central circular hole 1211; the first limiting portion 71 and the second limiting portion 72 are both bar-shaped columns, the length of the first limiting portion 71 is less than the maximum length of the second limiting hole 121 and greater than the aperture of the central circular hole 1211; the length of the second limiting portion 72 is greater than the maximum length of the second limiting hole 121. In other words, when the first limiting portion 71 is aligned with the central circular hole 1211 and the bar-shaped holes 1212, the first limiting portion 71 can pass through the second limiting hole 121, while when the second limiting portion 72 is aligned with the central circular hole 1211 and the bar-shaped holes 1212, the second limiting portion 72 cannot pass through the second limiting hole 121. When the first limiting portion 71 is offset from the strip-shaped hole 1212 , the first limiting portion 71 cannot pass through the second limiting hole 121 . This structure is simple and easy to manufacture.

[0068] Furthermore, considering the convenience of processing the limiting pin 7, in some embodiments, the limiting pin 7 includes a pin shaft body 73 and a first hollow pin 711 and a second hollow pin 721 vertically penetrated through the pin shaft body 73, the length of the first hollow pin 711 is less than the length of the second hollow pin 721, the first hollow pin 711 and the second hollow pin 721 are respectively grooved along their respective axial directions, and both ends are chamfered respectively, the pin shaft body 73 is provided with a first insertion hole and a second insertion hole, the first hollow pin 711 is inserted into the first insertion hole to form the first limiting portion 71; the second hollow pin 721 is inserted into the second insertion hole to form the second limiting portion 72; when the first hollow pin 711 is inserted into the second insertion hole, the second limiting portion 72 is formed. When inserting into the first insertion hole and inserting the second hollow pin 721 into the second insertion hole, since the first hollow pin 711 and the second hollow pin 721 are axially grooved and elastic, they will shrink along the diameter direction of the first hollow pin 711 and the second hollow pin 721, thereby facilitating the first hollow pin 711 to be inserted into the first insertion hole and the second hollow pin 721 to be inserted into the second insertion hole. After insertion, the first hollow pin 711 and the second hollow pin 721 are automatically prevented from loosening. Under the action of the elastic restoring force of the first hollow pin 711 and the second hollow pin 721 themselves, the first hollow pin 711 is pressed against the inner wall of the first insertion hole, and the second hollow pin 721 is pressed against the inner wall of the second insertion hole, thereby achieving an anti-loosening effect.

[0069] Furthermore, in some embodiments, the first hollow pin 711 and the second hollow pin 721 are vertically arranged.

[0070] When the leg mounting base 6 is rotated horizontally to the position of the required angle and needs to be fixed, the limit pin 7 passes through the second limit hole 121, the third limit hole 131, the first limit hole 62 and the fourth limit hole 141. At this time, the first hollow pin 711 and the second hollow pin 721 are both located between the upper ear plate 12 and the limit plate 13. When it is necessary to adjust the angle of the leg mounting base 6 in the horizontal direction, align the first hollow pin 711 with the second limiting hole 121, pull the limiting pin 7 upward, and disengage the limiting pin 7 from the fourth limiting hole 141 and the first limiting hole 62. When the first hollow pin 711 passes through the second limiting hole 121, rotate the limiting pin 7 by a certain angle (for example, 90°) so that the first hollow pin 711 contacts the surface of the upper ear plate 12 to prevent the limiting pin 7 from falling downward; at this time, since the length of the second hollow pin 721 is greater than the maximum length of the second limiting hole 121, the second hollow pin 721 will not be pulled out of the second limiting hole 121, thereby preventing the limiting pin 7 from disengaging from the upper ear plate 12.

[0071] Of course, in other embodiments, the first hollow pin 711 and the second hollow pin 721 can also be replaced by the first steel ball quick release pin 712 and the second steel ball quick release pin 722 respectively. The steel ball quick release pins (such as the first steel ball quick release pin 712 and the second steel ball quick release pin 722) are purchased parts. There is a spring in the steel ball quick release pin to support the steel ball. When the first steel ball quick release pin 712 is inserted into the first socket and the second steel ball quick release pin 722 is inserted into the second socket, the hole wall of the socket squeezes the steel ball, and the steel ball will move radially, so that the first steel ball quick release pin 712 can be inserted into the first socket and the second steel ball quick release pin 722 can be inserted into the second socket; when the steel ball leaves the hole wall of the socket, the elastic force of the spring will restore the steel ball to its original shape, jamming the edge of the hole wall of the socket, thereby playing a role in preventing loosening and limiting.

[0072] In addition, in order to facilitate the insertion and removal of the limit pin 7, in some embodiments, the limit pin 7 further includes a pull ring 74 provided at one end of the pin shaft body 73. When inserting and removing the limit pin 7, it is sufficient to pull the pull ring 74 or apply pressure to the pull ring 74, which is convenient for operation.

[0073] It should be noted that this embodiment does not limit the specific connection method between the pull ring 74 and the pin body 73, as long as the connection between the two can be achieved.

[0074] In some embodiments, the pull ring 74 is threadedly connected to the pin body 73. At the same time, the limiting pin 7 further includes a third hollow pin 75 vertically inserted into the pin body 73. The third hollow pin 75 is used to connect the pull ring 74 to the pin body 73. For example, the lower shaft of the pull ring 74 is provided with an external thread, and the top of the pin body 73 is provided with an internal threaded hole; the lower shaft of the pull ring 74 is provided with a third insertion hole, and the pin body 73 is provided with a fourth insertion hole; during installation, the pull ring 74 is screwed onto the pin body 73 through the threaded engagement of the external thread and the internal threaded hole. When the pull ring 74 is screwed into place, the third insertion hole of the pull ring 74 is aligned with the fourth insertion hole of the pin body 73, and the third hollow pin 75 is inserted into the fourth insertion hole and the third insertion hole, thereby further fixing the pull ring 74 and the pin body 73.

[0075] It should be noted that this embodiment does not limit the specific structure of the third hollow pin 75 , and the structure of the third hollow pin 75 may be the same as the structure of the first hollow pin 711 and the second hollow pin 721 described above.

[0076] In other embodiments, the pull ring 74 is fixed to the pin body 73 by welding.

[0077] Furthermore, to limit the maximum horizontal rotation angle of the leg mount 6, in some embodiments, the leg mount 6 is provided with a stop block 63, and the limit plate 13 is provided with a limit protrusion 132 for cooperating with the stop block 63 to limit the position. That is, during the rotation of the leg mount 6, when the leg mount 6 reaches the maximum rotation angle, the stop block 63 contacts the limit protrusion 132, which stops and limits the stop block 63, thereby restricting further rotation of the leg mount 6. Furthermore, when the leg mount 6 reaches the maximum rotation angle, inserting the limit pin 7 into the first limit hole 62 of the leg mount 6 corresponding to the maximum rotation angle can also serve to limit the maximum rotation angle of the leg mount 6. That is, this embodiment utilizes the cooperation and limitation of the stop block 63 and the limiting protrusion 132, as well as the cooperation and limitation of the limiting pin 7 and the first limiting hole 62 corresponding to the maximum rotation angle of the leg mounting seat 6, to jointly limit the maximum rotation angle of the leg mounting seat 6. This is a redundant design, which can prevent damage to the limiting pin 7.

[0078] It is understood that the number of leg mounts 6 is the same as the number of legs 4, and the two are provided in a one-to-one correspondence. If there are multiple legs 4, then there are also multiple leg mounts 6. For example, if there are four legs 4, then there are also four leg mounts 6. The above embodiments do not limit the maximum horizontal rotation angle of each leg mount 6. The maximum horizontal rotation angles of each leg mount 6 can be the same or different. The leg mount 6 can rotate horizontally to any angle to better adapt to the work site.

[0079] In some embodiments, there are four leg mounts 6 and four legs 4, respectively. The four leg mounts 6 are symmetrically arranged in pairs at the front and rear ends of the chassis 1. For ease of description, the leg mounts 6 located at the front end of the chassis 1 are referred to as front leg mounts, and the leg mounts 6 located at the rear end of the chassis 1 are referred to as rear leg mounts. In some embodiments, the maximum horizontal rotation angle of the front leg mounts is 150°; the maximum horizontal rotation angle of the rear leg mounts is 85°.

[0080] It should be noted that the above-mentioned embodiments do not limit the specific structure of the leg mounting bracket 6. Considering the convenience of structural design, in some embodiments, the front leg mounting bracket and the rear leg mounting bracket have roughly the same specific structure except for the maximum rotation angle.

[0081] In some embodiments, the leg mounting base 6 includes two first side plates 64 and an upper plate 65 and a lower plate 66 respectively connected between the two first side plates 64, and the inner sides of the two first side plates 64 are respectively provided with a third shaft sleeve 67, and the fifth pin shaft 68 is installed in the third shaft sleeve 67; the corresponding positions of the two first side plates 64 are respectively provided with shaft holes, and the first pin shaft 61 is installed in the shaft holes; the corresponding positions of the upper plate 65 and the lower plate 66 are respectively provided with fourth shaft sleeves 69, and the second pin shaft 11 is installed in the fourth shaft sleeve 69 through a bearing; the lower plate 66 is provided with a plurality of first limiting holes 62 (for example, the lower plate 66 is provided with four first limiting holes 62) for inserting the limiting pin 7; the lower plate 66 is provided with a stop block 63 for limiting the maximum rotation angle of the leg mounting base 6.

[0082] In addition, it should be noted that the above-mentioned embodiments do not limit the specific number and shape of the legs 4. In some embodiments, the number of legs 4 is four, and each of the four legs 4 is a V-shaped bend. This embodiment does not limit the bending angle of the V-shaped bend. In some embodiments, the bending angle of the V-shaped bend is greater than or equal to 90°. The four legs 4 are V-shaped bends, which form a spider-like structure of the chassis 1. This structure helps to improve the overall strength and rigidity of the chassis 1 and improves stability.

[0083] In some embodiments, the support leg 4 includes a first rectangular tube 41, a second rectangular tube 42, two reinforcing plates 43, two connecting plates 44, two ear plates 45, a first sleeve 46 and an ear seat 47 welded together; the corresponding positions of the two reinforcing plates 43 are respectively provided with mounting holes, and the sixth pin 48 is installed in the mounting holes; the first bearing 491 is installed in the first sleeve 46; and the second bearing 492 is installed in the hole of the ear seat 47.

[0084] In other embodiments, the first rectangular tube 41 and the second rectangular tube 42 are formed by cutting, bending and welding a rectangular tube.

[0085] It should be noted that the above embodiments do not limit the specific structure of the outrigger drive mechanism 5, as long as the outrigger drive mechanism 5 can drive the outrigger 4 to pitch up and down. In some embodiments, the outrigger drive mechanism 5 is a cylinder for the outrigger 4, the cylinder barrel of the cylinder for the outrigger 4 being connected to the fifth pin 68 of the outrigger mounting base 6, and the cylinder rod of the cylinder for the outrigger 4 being connected to the sixth pin 48 of the outrigger 4. When the cylinder for the outrigger 4 extends, the outrigger 4 touches the ground; when the cylinder for the outrigger 4 retracts, the outrigger 4 lifts off the ground.

[0086] Furthermore, to enhance the stability of the outrigger 4 when it is on the ground, in some embodiments, a leg foot plate 10 is provided at one end of the outrigger 4 away from the base frame 1. The leg foot plate 10 is connected to the outrigger 4 via a pin, meaning that the leg foot plate 10 can rotate relative to the outrigger 4. In other words, when the outrigger 4 is on the ground, the outrigger foot plate 10 contacts the ground, and the large area of ​​the leg foot plate 10 enhances the stability of the outrigger 4 in contact with the ground. Furthermore, the rotatable connection between the leg foot plate 10 and the outrigger 4 allows the leg foot plate 10 to better adapt to the work site and better contact the ground, thereby ensuring stable support for the outrigger 4.

[0087] Furthermore, to protect the outrigger drive mechanism 5, in some embodiments, the outrigger 4 is provided with a protective plate 8 for protecting the outrigger drive mechanism 5. In other words, by providing the protective plate 8 on the outrigger 4, this embodiment protects the outrigger drive mechanism 5 from damage by foreign objects. In some embodiments, the protective plate 8 is connected to the outrigger 4 via a pin, so that the protective plate 8 moves with the outrigger drive mechanism 5, thereby preventing it from affecting its operation.

[0088] It should be noted that, in the above embodiments, there is no limitation on the specific arrangement of the crawler traveling mechanism 2 on the chassis 1 , as long as the crawler traveling mechanism 2 can be lifted or lowered relative to the chassis 1 under the action of the crawler lifting mechanism 3 .

[0089] In some embodiments, the chassis 1 is provided with a slidable crawler hoist 9, the crawler travel mechanism 2 is connected to the crawler hoist 9, and the crawler lifting mechanism 3 is connected between the crawler hoist 9 and the chassis 1. During operation, the crawler lifting mechanism 3 operates to raise or lower the crawler hoist 9 relative to the chassis 1, thereby causing the crawler hoist 9 to raise or lower the crawler travel mechanism 2. Because the crawler hoist 9 is slidably mounted on the chassis 1, the chassis 1 limits the sliding movement of the crawler hoist 9, ensuring the stability of the crawler travel mechanism 2 during lifting or lowering.

[0090] It can be understood that there are two crawler running mechanisms 2 , and the two crawler running mechanisms 2 are symmetrically arranged with respect to the chassis 1 .

[0091] This embodiment does not limit the number and distribution of the crawler lifting mechanisms 3. In some embodiments, the number of crawler lifting mechanisms 3 is four, and each crawler traveling mechanism 2 is connected to two crawler lifting mechanisms 3, respectively, and two crawler lifting mechanisms 3 drive one crawler traveling mechanism 2 to lift or lower; the crawler lifting mechanisms 3 connected to different crawler traveling mechanisms 2 are arranged in pairs in an eight-shaped shape.

[0092] In addition, this embodiment does not limit the number and distribution of the track lifting frames 9. In some embodiments, the number of track lifting frames 9 is four, and each crawler traveling mechanism 2 is connected to two track lifting frames 9; the crawler lifting frames 9 connected to different crawler traveling mechanisms 2 are arranged in pairs in an eight-shaped shape.

[0093] In some embodiments, the crawler lifting mechanism 3 is a crawler lifting cylinder. The cylinder barrel of the crawler lifting cylinder is installed in the cylinder seat of the chassis 1. The cylinder seat of the chassis 1 is provided with a third pin 15. The cylinder barrel of the crawler lifting cylinder is connected to the chassis 1 via the third pin 15. The cylinder rod of the crawler lifting cylinder is installed in the rectangular tube cavity of the crawler lifting frame 9. The rectangular tube cavity of the crawler lifting frame 9 is provided with a fourth pin 95. The cylinder rod of the crawler lifting cylinder is connected to the crawler lifting frame 9 via the fourth pin 95. When the crawler lifting cylinder is extended, the crawler walking mechanism 2 is lowered to the ground; when the crawler lifting cylinder is retracted, the crawler walking mechanism 2 is lifted off the ground.

[0094] In some embodiments, the chassis 1 is provided with a rectangular hole, and the crawler lifting frame 9 is slidably disposed in the rectangular hole.

[0095] In some embodiments, the crawler lifting frame 9 includes a welded third rectangular tube 91, two second side plates 92, two second shaft sleeves 93, and a mounting plate 94. The fourth pin 95 is installed in the two second shaft sleeves 93. The mounting plate 94 is used to connect to the crawler walking mechanism 2. In some embodiments, the mounting plate 94 is connected to the crawler walking mechanism 2 by bolts.

[0096] In addition to the above-mentioned underframe device, the present invention also provides an aerial work vehicle including the underframe device disclosed in the above-mentioned embodiment. For the structures of other parts of the aerial work vehicle, please refer to the prior art and will not be described in detail herein.

[0097] That is to say, the focus of this embodiment is to adopt the chassis device disclosed in any of the above embodiments. Since the chassis device adopts the crawler walking mechanism 2 when walking and is supported on the ground by the support legs 4 when fixed, the aerial work vehicle can adapt to complex work sites and ensure the stability of the aerial work vehicle during operation.

[0098] It should also be noted that, in this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0099] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0100] The above is a detailed introduction to the chassis device and aerial work vehicle provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core concept of the present invention. It should be noted that for those skilled in the art, various improvements and modifications can be made to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A chassis device, characterized in that: include: bottom frame (1); A crawler walking mechanism (2) is provided on both sides of the chassis (1); A crawler lifting mechanism (3) is connected between the chassis (1) and the crawler traveling mechanism (2) and is used to drive the crawler traveling mechanism (2) to lift or lower; A plurality of supporting legs (4) are provided on the base frame (1) so as to be able to pitch up and down; A leg driving mechanism (5) is connected between the base frame (1) and the leg (4) and is used to drive the leg (4) to pitch up and down so that the leg (4) touches the ground or leaves the ground; The supporting legs (4) are arranged on the base frame (1) so as to be rotatable in both directions in a horizontal direction; The base frame (1) is provided with a leg mounting seat (6) capable of bidirectional rotation in a horizontal direction, the leg (4) is connected to the leg mounting seat (6) via a first pin shaft (61), and both ends of the leg driving mechanism (5) are hinged to the leg (4) and the leg mounting seat (6) respectively; The leg mounting seat (6) is connected to the base frame (1) via a second pin shaft (11), and the leg mounting seat (6) is provided with a plurality of first limiting holes (62) having different angles along the circumference of the second pin shaft (11); the base frame (1) is provided with a limiting pin (7) that is pluggable and selectively engages with the first limiting hole (62); The base frame (1) is provided with: The upper ear plate (12) is provided with a second limiting hole (121), and the second limiting hole (121) is a special-shaped hole; A limiting plate (13) is provided with a third limiting hole (131); The lower ear plate (14) is provided with a fourth limiting hole (141); the limiting plate (13) is arranged between the upper ear plate (12) and the lower ear plate (14); the center lines of the second limiting hole (121), the third limiting hole (131) and the fourth limiting hole (141) are collinear; the first limiting hole (62) is located between the limiting plate (13) and the lower ear plate (14); The limiting pin (7) is passed through the second limiting hole (121), the third limiting hole (131) and the fourth limiting hole (141), and the outer periphery of the limiting pin (7) is provided with: The first limiting portion (71) is located between the upper ear plate (12) and the limiting plate (13), and when rotated to a preset position, can pass through the second limiting hole (121); when rotated to a position offset from the preset position, the first limiting portion (71) and the upper ear plate (12) are stopped and limited; A second limiting portion (72), located between the upper ear plate (12) and the limiting plate (13), is used to prevent the limiting pin (7) from detaching from the base frame (1); The limiting pin (7) comprises a pin body (73) and a pull ring (74) provided at one end of the pin body (73).

2. The chassis device according to claim 1, characterized in that The second limiting hole (121) comprises a middle circular hole (1211) and two strip-shaped holes (1212) respectively connected to the middle circular hole (1211) and symmetrically arranged with respect to the middle circular hole (1211); The first limiting portion (71) and the second limiting portion (72) are both bar-shaped columns; the length of the first limiting portion (71) is less than the maximum length of the second limiting hole (121) and greater than the aperture of the middle circular hole (1211); the length of the second limiting portion (72) is greater than the maximum length of the second limiting hole (121).

3. The chassis device according to claim 1, wherein: The leg mounting seat (6) is provided with a stop block (63), and the limit plate (13) is provided with a limit protrusion (132) for cooperating with the stop block (63) to limit the position.

4. The chassis device according to any one of claims 1 to 3, characterized in that: The supporting leg (4) is provided with a protective plate (8) for protecting the supporting leg driving mechanism (5).

5. The chassis device according to any one of claims 1 to 3, characterized in that: The chassis (1) is provided with a slidable crawler lifting frame (9), the crawler walking mechanism (2) is connected to the crawler lifting frame (9), and the crawler lifting mechanism (3) is connected between the crawler lifting frame (9) and the chassis (1).

6. An aerial work vehicle, characterized in that: The invention comprises the chassis device according to any one of claims 1 to 5.

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