Unmanned transport vehicle

Abstract

The utility model discloses an unmanned transport vehicle, including frame and be located on the lifting device of frame, lifting device includes base, be located on the bearing platform of base top, the scissor type drive mechanism of connection base and bearing platform, be located at the translation subassembly of bearing platform top and be located on the detachable connecting mechanism of base, lifting device is connected to frame through detachable connecting mechanism, and scissor type drive mechanism can controllably drive bearing platform away from or close to base. In the narrow space, the scissor type drive of the utility model can drive bearing platform away from or close to base, change the height of bearing platform, and the goods on bearing platform are transported to the corresponding position. And, the detachable connecting mechanism of lifting device can be connected to the frame of different types unmanned transport vehicle, improves the versatility of lifting device.

Description

Technical Field

[0001] This utility model belongs to the field of unmanned vehicle technology, specifically relating to an unmanned transport vehicle. Background Technology

[0002] In modern warehousing, logistics, and industrial manufacturing, forklifts and scissor lifts, as core cargo handling equipment, have long faced the problem of inconvenience in operating within confined spaces. Traditional forklifts, limited by their rigid chassis structure and turning radius requirements, struggle to maneuver flexibly in environments with narrow rack spacing. Large scissor lifts, due to their height, cannot access areas around low-ceilinged racks. Therefore, current forklifts and scissor lifts are no longer sufficient to meet the needs of transferring goods in confined spaces.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide an unmanned transport vehicle that solves the problem that existing forklifts and lifting vehicles cannot transfer goods in narrow spaces.

[0005] To achieve the above objectives, a specific embodiment of this utility model provides an unmanned transport vehicle. The unmanned transport vehicle includes a frame and a lifting device mounted on the frame. The lifting device includes a base, a support platform mounted above the base, a scissor drive mechanism connecting the base and the support platform, a translation component mounted on top of the support platform, and a detachable connection mechanism mounted on the base. The lifting device is connected to the frame via the detachable connection mechanism, and the scissor drive mechanism can controllably drive the support platform away from or closer to the base.

[0006] In one or more embodiments of this utility model, when the scissor-driven mechanism drives the bearing platform away from or near the base, the bearing surface of the bearing platform remains horizontal.

[0007] In one or more embodiments of this utility model, the scissor drive mechanism includes a first hinge arm and a second hinge arm that are centrally hinged. The first hinge arm is pivotally connected to a support platform at one end near the head of the frame and slidably connected to a first strip groove on the base at one end near the tail of the frame. The second hinge arm is pivotally connected to the base at one end near the head of the frame and slidably connected to a second strip groove on the support platform at one end near the tail of the frame.

[0008] In one or more embodiments of the present invention, the scissor drive mechanism further includes a connecting rod disposed between the top pivot point and the intermediate hinge point of the first articulated arm, and a hydraulic cylinder pivotally connected to the connecting rod and the base on one side adjacent to the rear of the frame.

[0009] In one or more embodiments of this utility model, the unmanned transport vehicle further includes a hydraulic system located below the base, the hydraulic system being used to supply hydraulic oil to the hydraulic cylinder of the scissor drive mechanism.

[0010] In one or more embodiments of this utility model, a first sliding plate is provided on the top of the base, a first strip-shaped sliding groove is formed on the first sliding plate, a second sliding plate is provided on the bottom of the bearing platform, a second strip-shaped sliding groove is formed on the second sliding plate, and a first hinged arm and a second hinged arm are located between the first sliding plate and the second sliding plate in the vehicle width direction.

[0011] In one or more embodiments of this utility model, the translation component includes a plurality of omnidirectional balls arranged in a matrix.

[0012] In one or more embodiments of this utility model, the translation component further includes a plurality of ball bearing seats arranged in a matrix, with a plurality of universal balls corresponding to each other on the plurality of ball bearing seats.

[0013] In one or more embodiments of this utility model, the detachable connection mechanism includes a quick-release pin mechanism, a sliding sleeve connection mechanism, a bolt connection mechanism, a snap-fit ​​connection mechanism, and a slide rail groove connection structure.

[0014] In one or more embodiments of this utility model, the unmanned transport vehicle also includes a protective plate on the frame, the frame and the protective plate together form a receiving space, the base is located in the receiving space, and when the carrying platform moves to the lowest position, the scissor drive mechanism is completely received in the receiving space.

[0015] In one or more embodiments of this utility model, the unmanned transport vehicle further includes a front end, and the protective plate includes a rear plate disposed opposite to the front end, and two side plates disposed between the front end and the rear plate.

[0016] In one or more embodiments of this utility model, on a plane parallel to the support platform, the vertical projection of the support platform is completely located within the vertical projection of the receiving space.

[0017] Compared to existing technologies, in confined spaces, the scissor lift mechanism of this invention can move the carrying platform away from or closer to the base, changing the height of the carrying platform and transporting goods on it to the appropriate location. Furthermore, the detachable connection mechanism of the lifting device can be connected to the frame of different types of unmanned transport vehicles, improving the versatility of the lifting device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of an unmanned transport vehicle in one embodiment of the present invention;

[0020] Figure 2 This is a perspective structural diagram of the lifting device in one embodiment of the present invention;

[0021] Figure 3 This is an exploded structural diagram of the lifting device in one embodiment of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the scissor drive mechanism in one embodiment of the present invention;

[0023] Figure 5 This is a side view of the scissor drive mechanism in one embodiment of the present invention;

[0024] Figure 6 This is a three-dimensional structural diagram of the translation component in one embodiment of the present invention.

[0025] Key reference numerals in the attached drawings: 1. Frame; 2. Base; 21. First slide plate; 22. First strip slide; 3. Load-bearing platform; 31. Second slide plate; 32. Second strip slide; 33. Load-bearing surface; 4. Scissor drive mechanism; 41. First articulated arm; 42. Second articulated arm; 43. Connecting rod; 44. Hydraulic cylinder; 5. Translation assembly; 51. Universal ball bearing; 52. Ball bearing seat; 6. Hydraulic system; 7. Front of the vehicle; 8. Protective plate; 81. Tail plate; 82. Side plate. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0027] In the description of this utility model, it should be understood that the terms "top", "bottom", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "second" and "first" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "second" or "first" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] Reference Figures 1 to 3 As shown, one embodiment of the present invention provides an unmanned transport vehicle, which includes a frame 1 and a lifting device mounted on the frame 1. The lifting device includes a base 2, a bearing platform 3, a scissor drive mechanism 4, a translation component 5, and a detachable connection mechanism.

[0030] Specifically, both the base 2 and the carrying platform 3 are plate-like structures, with the carrying platform 3 positioned above the base 2 and used to carry goods. A scissor-drive mechanism 4 is connected to the base 2 and the carrying platform 3, used to drive the carrying platform 3 away from or towards the base 2, changing the height of the carrying platform 3 and thus transporting the goods on it to the appropriate position. A translation component 5 is located on top of the carrying platform 3, used to assist workers in moving goods along the carrying platform 3 and reduce resistance when moving goods along it. A detachable connection mechanism is located on the base 2, allowing the base 2 to be connected to the frame 1.

[0031] The specific structure of the detachable connection mechanism can be adaptively adjusted according to the type and size of the unmanned transport vehicle.

[0032] As an example, when unmanned transport vehicles are applied to small and medium-sized vehicles, the maintenance frequency of these vehicles is relatively high. Therefore, the detachable connection mechanism needs to be easier to disassemble and replace, while also meeting the requirement of lightweight design. Thus, quick-release pin mechanisms, which are relatively easy to disassemble and replace and lighter in weight, are preferred. A quick-release pin mechanism generally includes a pin and a locking structure on the pin. The locking structure typically consists of a spring and a steel ball. After the pin is inserted into the pin hole on the unmanned transport vehicle, the spring engages the ball in a groove on the hole wall, thus connecting the unmanned transport vehicle to the lifting device.

[0033] In addition, for small and medium-sized unmanned transport vehicles, the detachable connection mechanism can also be a snap-fit ​​connection mechanism or a slide rail and groove connection structure.

[0034] Currently, the mainstream snap-fit ​​connection mechanisms include electromagnetic induction snap-fit ​​mechanisms and laser alignment interlocking snap-fit ​​mechanisms. Electromagnetic induction snap-fit ​​mechanisms generally consist of a plug and a slot that interlock. The plug is a retractable metal plug with a soft magnetic alloy core inside. The slot integrates an electromagnetic coil, which generates a magnetic field when energized, creating an attraction force with the soft magnetic alloy core of the plug.

[0035] A laser-aligned plug-in latching mechanism generally includes a laser sensor, a rotary motor, and a claw structure. The laser sensor can be installed on the base 2 or the frame 1 of the unmanned transport vehicle. It can emit a cross laser line and project it onto the base 2 or the frame 1. With the help of the corresponding algorithm program, laser positioning is achieved. The rotary motor and the claw structure can be installed on the base 2 of the unmanned transport vehicle. The rotary motor drives the claw structure to rotate, so that the claw structure engages with the slot on the side of the frame 1 to form a rigid connection.

[0036] As another example, when unmanned transport vehicles are applied to large unmanned transport vehicles, since the maintenance frequency of large unmanned transport vehicles is relatively low, the requirements for installation accuracy and structural strength are relatively high. Therefore, detachable connection mechanisms such as sliding sleeve connection mechanisms and bolt connection mechanisms are preferred.

[0037] The sliding sleeve connection mechanism generally includes a sliding sleeve, a sliding rod, and a limiting structure that cooperate with each other. The sliding sleeve is connected to one of the components of the unmanned transport vehicle's base 2 and the unmanned transport vehicle's frame 1, while the sliding rod is connected to the other component and can slide freely within the sliding sleeve. The limiting structure is generally located at the end of the sliding rod to prevent the sliding rod from detaching from the sliding sleeve, thus ensuring the safety and reliability of the sliding sleeve connection mechanism.

[0038] Bolted connection mechanisms generally include bolts and nuts. Through holes are made in the base 2 and frame 1 of the unmanned transport vehicle. The bolt is passed through the two through holes in sequence, and then the nut is tightened. Alternatively, threaded holes that mate with the bolts can be provided in the base 2 and frame 1 of the unmanned transport vehicle, in which case a nut is not required.

[0039] It should be noted that the specific structures of the above-described detachable connection mechanisms are preferred design options available for practical applications. These structures are illustrative and do not constitute a limitation on the embodiments of this utility model. In addition to the above examples, other types of connection mechanisms may also be used for the detachable connection mechanism.

[0040] In one embodiment, reference is made to Figures 2 to 5As shown, the base 2 and the support platform 3 are roughly parallel to each other. When the scissor drive mechanism 4 drives the support platform 3 away from or closer to the base 2, the support surface 33 of the support platform 3 remains basically horizontal.

[0041] In one embodiment, reference is made to Figures 2 to 5 As shown, the scissor drive mechanism 4 includes two articulated arm structures arranged along the width direction of the vehicle body. Each articulated arm structure includes a first articulated arm 41 and a second articulated arm 42, which are arranged crosswise and are hinged to each other approximately at the center.

[0042] Furthermore, the base 2 has a first sliding plate 21 at its top, and the first sliding plate 21 has a first strip-shaped sliding groove 22 recessed along the width direction of the vehicle body. The support platform 3 has a second sliding plate 31 at its bottom, and the second sliding plate 31 has a second strip-shaped sliding groove 32 recessed along the width direction of the vehicle body. The first hinge arm 41 and the second hinge arm 42 are located between the first sliding plate 21 and the second sliding plate 31 in the width direction of the vehicle body.

[0043] Furthermore, the end of the first articulated arm 41 near the head of the frame 1 is pivotally connected to the support platform 3, and the end of the first articulated arm 41 near the tail of the frame 1 is slidably connected to the first strip groove 22. The end of the second articulated arm 42 near the head of the frame 1 is pivotally connected to the base 2, and the end of the second articulated arm 42 near the tail of the frame 1 is slidably connected to the second strip groove 32.

[0044] In one embodiment, reference is made to Figure 4 and Figure 5 As shown, the scissor lift drive mechanism 4 also includes a connecting rod 43 and a hydraulic cylinder 44. The connecting rod 43 connects the first articulated arms 41 on both sides, and the connection point between the connecting rod 43 and the first articulated arms 41 is located between the top pivot point (the pivot connection point with the support platform 3) and the middle hinge point (the hinge connection point with the second articulated arm 42) of the first articulated arm 41. The hydraulic cylinder 44 is inclined, with its top end pivotally connected to the connecting rod 43 and its bottom end pivotally connected to the base 2. The pivot connection point between the hydraulic cylinder 44 and the base 2 is relatively close to the rear of the frame 1.

[0045] In one embodiment, reference is made to Figure 5 As shown, in order to avoid interference between the first slide plate 21 and the second slide plate 31 during the lifting and lowering of the support platform 3, the first slide plate 21 and the second slide plate 31 are staggered in the vehicle width direction, and the first articulated arm 41 and the second articulated arm 42 are located between the first slide plate 21 and the second slide plate 31 in the vehicle width direction.

[0046] In one embodiment, reference is made to Figure 2 and Figure 3As shown, the unmanned transport vehicle also includes a hydraulic system located below the base 2 and connected to the cylinder body of the hydraulic cylinder 44 via pipelines. The hydraulic system is used to supply hydraulic oil to the inside of the hydraulic cylinder 44, thereby driving the hydraulic cylinder 44 to extend or retract.

[0047] In one embodiment, reference is made to Figures 1 to 4 As shown, the support platform 3 has multiple ball bearing seats 52 on the side facing away from the base 2. The ball bearing seats 52 are generally constructed as columnar structures and protrude from the support platform 3. The interior of the ball bearing seat 52 has a ball socket for accommodating universal balls 51, and the multiple universal balls 51 are correspondingly arranged in the ball sockets of the multiple ball bearing seats 52.

[0048] Furthermore, the multiple omnidirectional balls 51 and the multiple ball seats 52 are arranged in a matrix.

[0049] Preferably, the bearing platform 3 can be equipped with a bullseye bearing, the bearing housing of the bullseye bearing forming a ball bearing seat 52, and the steel balls of the bullseye bearing forming universal balls 51.

[0050] In one embodiment, reference is made to Figure 1 and Figure 3 As shown, the unmanned transport vehicle also includes a protective plate 8 installed on the frame 1. The frame 1 and the protective plate 8 together form a receiving space. When the carrying platform 3 moves to the lowest position, the drive mechanism is completely received within the receiving space.

[0051] Furthermore, when the support platform 3 moves to its lowest position, in order to avoid interference between the support platform 3 and the guard plate 8, the planar dimensions of the support platform 3 should be smaller than the planar dimensions of the receiving space. Specifically, on a plane parallel to the support platform 3, the vertical projection of the support platform 3 is completely within the vertical projection of the receiving space.

[0052] In one embodiment, reference is made to Figure 1 and Figure 3 As shown, the guard plate 8 includes a tail plate 81 and two side plates 82. The tail plate 81 is disposed opposite to the front of the vehicle 7, and the two side plates 82 are disposed between the front of the vehicle 7 and the tail plate 81. The two side plates 82 extend as far as possible toward the front of the vehicle 7 and the tail plate 81.

[0053] Preferably, when the support platform 3 descends to the bottom, in order to hide the scissor drive mechanism 4 as much as possible, both side plates 82 are connected to the tail plate 81 to avoid gaps appearing on the guard plate 8 that would expose the scissor drive mechanism 4.

[0054] It should be noted that the unmanned transport vehicle in the above embodiments can be a flatbed unmanned transport vehicle, a cargo box unmanned transport vehicle, or other types of unmanned transport vehicles.

[0055] When the unmanned transport vehicle is a flatbed type, its size is relatively small, and the rear of the vehicle head 7 is a relatively low and unobstructed flatbed, making it more suitable for applications in relatively confined spaces (such as warehouse cargo handling). In such scenarios, forklifts and large lifting vehicles are inconvenient to use, but the flatbed unmanned transport vehicle can move flexibly in confined spaces, travel along a designated route to the target location, and be lifted and lowered via remote control of the carrying platform 3 to achieve the purpose of receiving or transferring goods.

[0056] When the unmanned transport vehicle is a cargo box type, it is relatively large in size, with a relatively tall cargo box installed behind the front 7, making it more suitable for applications in relatively spacious scenarios (such as e-commerce express delivery, park logistics, and urban waste transfer). In this scenario, the unmanned transport vehicle is generally installed inside the cargo box to lift goods, facilitating the quick unloading of goods from the carrying platform 3.

[0057] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An unmanned transport vehicle, characterized in that, The unmanned transport vehicle includes a frame (1) and a lifting device on the frame (1). The lifting device includes a base (2), a support platform (3) above the base (2), a scissor drive mechanism (4) connecting the base (2) and the support platform (3), a translation component (5) on the top of the support platform (3), and a detachable connection mechanism on the base (2). The lifting device is connected to the frame (1) through the detachable connection mechanism. The scissor drive mechanism (4) can controllably drive the support platform (3) away from or closer to the base (2).

2. The unmanned transport vehicle according to claim 1, characterized in that, When the scissor drive mechanism (4) drives the bearing platform (3) away from or near the base (2), the bearing surface (33) of the bearing platform (3) remains horizontal.

3. The unmanned transport vehicle according to claim 2, characterized in that, The scissor drive mechanism (4) includes a first hinge arm (41) and a second hinge arm (42) with the center hinged. The first hinge arm (41) is pivotally connected to the support platform (3) at one end near the head of the frame (1) and slidably connected to the first strip groove (22) on the base (2) at one end near the tail of the frame (1). The second hinge arm (42) is pivotally connected to the base (2) at one end near the head of the frame (1) and slidably connected to the second strip groove (32) on the support platform (3) at one end near the tail of the frame (1).

4. The unmanned transport vehicle according to claim 3, characterized in that, The scissor drive mechanism (4) further includes a connecting rod (43) located between the top pivot point and the middle hinge point of the first articulated arm (41), and a hydraulic cylinder (44) pivotally connected to the connecting rod (43) and the base (2) on one side near the rear of the frame (1); and / or, The unmanned transport vehicle also includes a hydraulic system (6) located below the base (2), which is used to supply hydraulic oil to the hydraulic cylinder (44) of the scissor drive mechanism (4).

5. The unmanned transport vehicle according to claim 3, characterized in that, The base (2) is provided with a first slide plate (21) at the top, and the first strip slide (22) is opened on the first slide plate (21). The bearing platform (3) is provided with a second slide plate (31) at the bottom, and the second strip slide (32) is opened on the second slide plate (31). The first hinge arm (41) and the second hinge arm (42) are located between the first slide plate (21) and the second slide plate (31) in the vehicle width direction.

6. The unmanned transport vehicle according to claim 1, characterized in that, The translation component (5) includes a plurality of omnidirectional balls (51) arranged in a matrix.

7. The unmanned transport vehicle according to claim 6, characterized in that, The translation component (5) also includes a plurality of ball bearing seats (52) arranged in a matrix, with the plurality of universal balls (51) corresponding to each other on the plurality of ball bearing seats (52).

8. The unmanned transport vehicle according to claim 1, characterized in that, The detachable connection mechanism includes a quick-release pin mechanism, a sliding sleeve connection mechanism, a bolt connection mechanism, a snap-fit ​​connection mechanism, and a slide rail and slide groove connection structure.

9. The unmanned transport vehicle according to claim 1, characterized in that, The unmanned transport vehicle also includes a protective plate (8) on the frame (1). The frame (1) and the protective plate (8) together form a receiving space. The base (2) is located in the receiving space. When the carrying platform (3) moves to the lowest position, the scissor drive mechanism (4) is completely received in the receiving space.

10. The unmanned transport vehicle according to claim 9, characterized in that, The unmanned transport vehicle also includes a front end (7), and the protective plate (8) includes a rear plate (81) opposite to the front end (7) and two side plates (82) located between the front end (7) and the rear plate (81); and / or, On a plane parallel to the support platform (3), the vertical projection of the support platform (3) is completely within the vertical projection of the receiving space.

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