A lifting mechanism for a crisp pear picking and carrying vehicle

Abstract

The utility model relates to picking and carrying vehicle picking and lifting technical field, concretely relates to a kind of lifting mechanism for crisp pear picking and carrying vehicle, including vehicle body, lifting assembly and picking mechanism are arranged on vehicle body, lifting assembly includes: support seat, slidingly set on vehicle body, adjustable assembly is movably installed on it, and carrying plate is used for carrying picking mechanism, support seat bottom is provided with sliding portion;Driving part, set on vehicle body, lifting support seat is controlled by driving sliding portion, driving part includes two groups of fixed seat rotationally installed on vehicle body, two groups of fixed seat are rotationally inserted with two threaded rods, same transmission belt is sleeved on two threaded rods, support seat is slidingly inserted on four threaded rods.The utility model is replaced by screw rod lifting, and the load-bearing capacity of shear type structure is significantly improved, and the structural stability is stronger, screw rod lifting is directly loaded by threaded transmission, avoids the problem of shear fork arm deformation, and can stably support heavy picking mechanical arm.

Description

Technical Field

[0001] This utility model relates to the field of harvesting and lifting technology for harvesting vehicles, specifically to a lifting mechanism for a pear harvesting and transporting vehicle. Background Technology

[0002] In modern fruit and vegetable harvesting and transportation, scissor lifts have become a common piece of equipment in fruit and vegetable transport vehicles due to their compact structure, small footprint, and smooth lifting. They achieve platform lifting through the extension and retraction of the scissor arms, conveniently transporting fruits and vegetables from the picking location to the transport vehicle, greatly improving harvesting and transportation efficiency.

[0003] However, its load-bearing capacity shortcomings have gradually become apparent. When the load approaches or exceeds the rated load, the deformation of the scissor lift mechanism becomes extremely obvious. As a key load-bearing component, the scissor arm is prone to bending and twisting under heavy pressure, causing the lifting platform to tilt. This not only threatens the safety of fruit and vegetable transportation but may also cause structural damage to the equipment. At the same time, uneven stress distribution is also a significant problem. Because it is difficult to ensure absolutely uniform loading of fruits and vegetables, coupled with the shaking and bumps during operation, the pressure on various components of the scissor lift varies significantly. This uneven stress distribution accelerates the wear of local components, reduces the overall stability of the mechanism, and increases the risk of equipment failure. Frequent deformation and uneven stress not only shorten the equipment's service life but also increase maintenance costs and, in extreme cases, even lead to safety accidents, severely hindering the efficient operation of fruit and vegetable harvesting and transportation. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a lifting mechanism for a pear harvesting and transporting vehicle, which can effectively solve the problem of poor load-bearing performance of the existing scissor lifting mechanism.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a lifting mechanism for a pear harvesting and transport vehicle, including a vehicle body, on which a lifting component and a harvesting mechanism are provided. The lifting component includes: a support base slidably disposed on the vehicle body, on which a bearing plate with an adjustment component is movably mounted, the bearing plate being used to support the harvesting mechanism, and a sliding part being provided at the bottom of the support base; and a driving component disposed on the vehicle body, which controls the lifting of the support base by driving the sliding part.

[0007] Furthermore, the drive unit includes two sets of fixed seats rotatably mounted on the vehicle body, each set of fixed seats having two threaded rods rotatably inserted into it, the two threaded rods being fitted with the same transmission belt, and the support seat being slidably inserted into the four threaded rods.

[0008] Furthermore, the sliding part includes: four traveling components installed on the bottom of the support base, including a connector fixedly installed on the bottom of the support base and a sliding collar fixedly connected to the connector. The inner ring of the sliding collar is threaded, and each sliding collar is threaded onto each threaded rod.

[0009] Furthermore, the sliding part also includes a limiting part, including a limiting post fixedly installed on the vehicle body and a limiting sleeve fixedly installed at the bottom of the support seat. The limiting sleeve is movably sleeved on the limiting post, and each sliding part is circumferentially arranged around the limiting sleeve.

[0010] Furthermore, the adjustment assembly includes: multiple slides fixedly mounted on a support plate, a first universal joint slidably sleeved on the slide, and multiple second universal joints fixedly mounted on the support base, with a telescopic rod fixedly connected to each first universal joint and each second universal joint in a one-to-one correspondence.

[0011] Furthermore, electric push rods are fixedly installed on the two second universal joints at a 90-degree angle along the center of the support base. The telescopic ends of the electric push rods are fixedly connected to the corresponding first universal joints, and the electric push rods push the bearing plate to maintain a relatively horizontal state.

[0012] Furthermore, a steering ball seat is fixedly connected to the support base, and the bearing plate is rotatably sleeved on the steering ball seat.

[0013] Furthermore, a buffer assembly is provided on the support base, the buffer assembly including: an airbag, which is disposed on the support base; and multiple support members, which are fixedly installed on the airbag and fixedly connected to the support base, and an early warning assembly is provided in the cavity of the support member. When the bearing plate compresses the airbag to the limit, the airbag triggers the early warning assembly.

[0014] Furthermore, the warning component includes a warning button fixedly installed in the cavity and a sliding member slidably inserted into the cavity. An elastic member is fixedly connected between the sliding member and the cavity. The top wall of the airbag presses down on the sliding member to contact the warning button.

[0015] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0016] 1. Significantly improved load-bearing capacity and stronger structural stability: The screw-lift mechanism replaces the scissor lift structure, using four screw rods to drive the support seat to lift. Compared to the unstable quadrilateral structure of traditional scissor lifts, the screw-lift mechanism directly bears the load through screw transmission, avoiding the problem of scissor arm deformation. It can stably support heavy-duty harvesting robotic arms and fully loaded fruits. Furthermore, the tortoise-shell cylindrical structure distributes the force, and the cooperation of the support seat, connectors, and limiting columns forms a four-corner support structure similar to a tortoise shell, effectively balancing the force in all directions, reducing the risk of local overload, and further enhancing load-bearing stability.

[0017] 2. The infrared rangefinder at the bottom of the support base monitors the distance of the support base from the ground in multiple directions in real time, and the linkage adjustment component dynamically adjusts the angle of the bearing plate to adapt to uneven terrain in the field, thereby improving harvesting efficiency and safety.

[0018] 3. The buffer component assists in adjusting the component in real time to maintain the dynamic balance of the support seat, while monitoring the tilt status of the load-bearing plate. When the load-bearing plate tilts to the threshold, a rollover warning will be issued to facilitate timely adjustment of the overall status of the vehicle. Attached Figure Description

[0019] 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 of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the lifting assembly of this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the driving component of this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the support base of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the adjustment component of this utility model;

[0025] Figure 6 This is a cross-sectional structural diagram of the steering ball seat of this utility model;

[0026] Figure 7 This utility model Figure 6 Enlarged view of the structure at point A in the middle.

[0027] Figure label:

[0028] 1. Vehicle body;

[0029] 2. Lifting assembly; 21. Drive component; 211. Fixed base; 212. Threaded rod; 213. Transmission belt; 22. Sliding part; 221. Connecting component; 222. Sliding collar; 223. Sliding sleeve; 224. Limiting post; 23. Support base; 24. Bearing plate; 241. Steering ball seat; 242. Slide seat; 243. First universal joint; 244. Second universal joint; 245. Electric push rod;

[0030] 3. Picking organizations;

[0031] 4. Buffer assembly; 41. Support component; 42. Airbag; 43. Cavity; 44. Warning button; 45. Elastic component; 46. Sliding component. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] The present invention will be further described below with reference to the embodiments.

[0034] Example: Refer to Figures 1-7 As shown, a lifting mechanism for a pear harvesting and transport vehicle includes a vehicle body 1. The vehicle body 1 is equipped with a lifting component 2 and a harvesting mechanism 3. The lifting component 2 includes: a support seat 23 slidably disposed on the vehicle body 1, a bearing plate 24 with an adjustment component movably mounted on the support seat 23, the bearing plate 24 being used to support the harvesting mechanism 3, and a sliding part 22 being provided at the bottom of the support seat 23; a driving component 21 is provided on the vehicle body 1, and the driving component 21 controls the lifting and lowering of the support seat 23 by driving the sliding part 22.

[0035] Specifically, the driving component 21 includes two sets of fixed seats 211 rotatably mounted on the vehicle body 1. Two threaded rods 212 are rotatably inserted into each of the two sets of fixed seats 211. The two threaded rods 212 are fitted with the same transmission belt 213. A stepper motor is fixedly installed inside the fixed seat 211. The output shaft of the stepper motor rotates coaxially with one of the threaded rods 212. The bottom end of the threaded rod 212 is fixedly fitted with a driving gear, and the bottom end of the other threaded rod 212 is fixedly fitted with a driven gear. The driving gear and the driven gear are transmitted through the transmission belt 213, realizing the movement of two gears driven by a single motor, ensuring the consistency of movement. At the same time, the stepper motors in the two sets of fixed seats 211 can actively adjust their working frequency to ensure the synchronization of the speed of the two sets of motors. By realizing the synchronization of the movement of the four threaded rods 212, this mechanism ensures that it can support a heavy top plate without deformation, while achieving consistent and stable lifting movement.

[0036] The quadrilateral structure of a scissor lift is inherently unstable, making it highly susceptible to deformation under stress. Applying significant pressure to the top of the scissor lift results in pronounced deformation and severely uneven stress distribution, making it difficult to support the mechanical arm of the harvesting mechanism 3. This can easily lead to structural damage during harvesting. Therefore, in this embodiment, the lifting component 2 employs a screw-type lifting structure. The screw-type lifting structure has a stronger load-bearing capacity, ensuring harvesting stability and efficiency. Furthermore, compared to a scissor lift, this structure allows for more precise height adjustment of the harvesting structure, enabling more accurate harvesting. In the context of agricultural harvesting machinery, this structure is more practical, offering greater stability, significantly increased load-bearing capacity, and longer single-harvest operation time, making it more versatile.

[0037] In addition, the screw jack structure has the following advantages: the screw mechanism has a relatively simple structure, is easy to manufacture, and has low production costs. This jacking mechanism can convert rotary motion into linear motion with extremely high accuracy and a very high speed reduction ratio. It can transmit and bear large axial forces, operates smoothly and without noise, and has a self-locking function. Screw mechanisms are commonly used in the machinery industry, instrumentation, tooling fixtures, etc., and are especially suitable for structures that support heavy machinery. Typically, a screw jack with a 40mm diameter screw can carry a load of 2 tons, while this mechanism has four 20mm diameter screw jacks, which is sufficient to support larger loads.

[0038] The sliding part 22 includes four traveling components installed at the bottom of the support base 23. Each traveling component includes a connector 221 fixedly installed at the bottom of the support base 23 and a sliding collar 222 fixedly connected to the connector 221. The cross-section of the connector 221 consists of two arcs with different curvatures and two straight lines connecting the two arcs. The straight line on the side of the support base 23 is longer than the straight line on the side of the sliding collar 222. The inner ring of the sliding collar 222 is threaded. Each sliding collar 222 is threaded onto each threaded rod 212. The support base 23 is slidably inserted onto the four threaded rods 212.

[0039] The sliding part 22 also includes a limiting part, which includes a limiting post 224 fixedly installed on the vehicle body 1 and a sliding sleeve 223 fixedly installed at the bottom of the support seat 23. The sliding sleeve 223 is movably sleeved on the limiting post 224, and each sliding part 22 is arranged around the sliding sleeve 223.

[0040] With this design, the threaded rod 212 drives the support seat 23 to rise and fall through the sliding collar 222. During the rising and falling process, the sliding sleeve 223 slides on the limiting post 224. The sliding part 22 and the support seat 23 form a tortoise-shaped cylindrical structure. The four corners of the tortoise-shaped shell are connected to the threaded rod 212, which can effectively balance and distribute the force and has stronger load-bearing capacity.

[0041] A steering ball seat 241 is fixedly connected to the support seat 23, and the bearing plate 24 is rotatably sleeved on the steering ball seat 241, and the bearing plate 24 can rotate along the surface of the steering ball seat 241.

[0042] The adjustment assembly includes multiple slide seats 242 fixedly installed on the support plate 24. A first universal joint 243 is slidably sleeved on the slide seat 242. Multiple second universal joints 244 are fixedly installed on the support base 23. Each first universal joint 243 and each second universal joint 244 are fixedly connected with a telescopic rod. Electric push rods 245 are fixedly installed on two second universal joints 244 at a 90-degree angle to the center of the support base 23. The telescopic end of the electric push rod 245 is fixedly connected to the corresponding first universal joint 243. When the vehicle body 1 travels to an uneven area and causes the vehicle body 1 to tilt, or when the support plate 24 tilts due to uneven picking weight during the picking process, the electric push rod 245 can push the support plate 24 to deflect the steering ball seat 241 to maintain the relative horizontal state of the picking mechanism 3.

[0043] It should be added that two sets of infrared rangefinders (not shown in the figure) are installed at the bottom of the support base 23 and on both sides of the vehicle body 1. By monitoring the distance between the support base 23 and the ground in four directions, the electric push rod 245 is driven to push the bearing plate 24 to maintain dynamic balance.

[0044] A buffer assembly 4 is provided on the support base 23. The buffer assembly 4 can assist the adjustment assembly in maintaining the horizontal state of the support plate 24, and also has the function of monitoring the tilt state of the support plate 24. The buffer assembly 4 includes an airbag 42 provided on the support base 23 and multiple support members 41 fixedly installed on the airbag 42 and fixedly connected to the support base 23. A warning component is provided in the cavity 43 of the support member 41. When the support plate 24 tilts due to uneven load distribution after parking, or when the vehicle encounters a large bump or passes through a large slope during driving, causing the support plate 24 to deviate from the horizontal state, the electric push rod 245 and the adjustment assembly will actively adjust the posture of the support plate 24 according to the monitoring data of the infrared rangefinder and the system algorithm to restore it to the horizontal state. If the tilt angle reaches the adjustment threshold of the electric push rod 245, the support plate 24 will press down so that the top of the airbag 42 contacts its bottom. At this time, the airbag 42 triggers the warning component to facilitate timely adjustment of the overall state of the vehicle.

[0045] Specifically, the warning component includes a warning button 44 fixedly installed in the cavity 43 and a sliding member 46 slidably inserted in the cavity 43. An elastic member 45, specifically a spring, is fixedly connected between the sliding member 46 and the cavity 43. The top wall of the airbag 42 presses down on the sliding member 46 until it contacts the warning button 44. The warning button 44 will issue a rollover warning to the system. If the warning is triggered during the picking process, the stepper motor will be started to lower the picking mechanism 3 through the lifting mechanism to reduce the center of gravity. If the warning is triggered during driving, the vehicle must quickly leave the uneven road area to avoid the risk of rollover.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lifting mechanism for a pear harvesting and transport vehicle, comprising a vehicle body (1), characterized in that, The vehicle body (1) is equipped with a lifting assembly (2) and a picking mechanism (3), wherein the lifting assembly (2) includes: A support base (23) is slidably mounted on the vehicle body (1), and a support plate (24) with an adjustment component is movably mounted on it. The support plate (24) is used to support the picking mechanism (3). A sliding part (22) is provided at the bottom of the support base (23). The drive unit (21) is mounted on the vehicle body (1) and controls the lifting and lowering of the support seat (23) by driving the sliding part (22).

2. The lifting mechanism for a pear harvesting and transport vehicle according to claim 1, characterized in that, The drive unit (21) includes two sets of fixed seats (211) rotatably mounted on the vehicle body (1). Two threaded rods (212) are rotatably inserted on each of the two sets of fixed seats (211). The two threaded rods (212) are fitted with the same transmission belt (213). The support seat (23) is slidably inserted on the four threaded rods (212).

3. The lifting mechanism for a pear harvesting and transport vehicle according to claim 1, characterized in that, The sliding part (22) includes: Four traveling components are installed at the bottom of the support base (23), including a connector (221) fixedly installed at the bottom of the support base (23) and a sliding collar (222) fixedly connected to the connector (221). The inner ring of the sliding collar (222) is threaded, and each sliding collar (222) is threaded onto each threaded rod (212).

4. The lifting mechanism for a pear harvesting and transport vehicle according to claim 1, characterized in that, The sliding part (22) further includes: The limiting part includes a limiting post (224) fixedly installed on the vehicle body (1) and a limiting sleeve fixedly installed at the bottom of the support seat (23). The limiting sleeve is movably sleeved on the limiting post (224), and each sliding part (22) is arranged around the circumference of the limiting sleeve.

5. The lifting mechanism for a pear harvesting and transport vehicle according to claim 1, characterized in that, The adjustment component includes: Multiple slides (242) are fixedly installed on the bearing plate (24). A first universal joint (243) is slidably sleeved on the slide (242). Multiple second universal joints (244) are fixedly installed on the support base (23). Each first universal joint (243) and each second universal joint (244) is fixedly connected with a telescopic rod in a one-to-one correspondence.

6. The lifting mechanism for a pear harvesting and transport vehicle according to claim 5, characterized in that, Electric push rods (245) are fixedly installed on the two second universal joints (244) at a 90-degree angle to the center of the support base (23). The telescopic end of the electric push rod (245) is fixedly connected to the corresponding first universal joint (243). The electric push rod (245) pushes the bearing plate (24) to maintain a relatively horizontal state.

7. The lifting mechanism for a pear harvesting and transport vehicle according to claim 1, characterized in that, A steering ball seat (241) is fixedly connected to the support seat (23), and the bearing plate (24) is rotatably sleeved on the steering ball seat (241).

8. The lifting mechanism for a pear harvesting and transport vehicle according to claim 1, characterized in that, A buffer assembly (4) is provided on the support base (23), the buffer assembly (4) comprising: An airbag (42) is mounted on a support (23); Multiple support members (41) are fixedly installed on the airbag (42) and fixedly connected to the support base (23). An early warning component is provided in the cavity (43). When the support plate (24) compresses the airbag (42) to the limit, the airbag (42) triggers the early warning component.

9. A lifting mechanism for a pear harvesting and transport vehicle according to claim 8, characterized in that, The warning component includes a warning button (44) fixedly installed in the cavity (43) and a sliding member (46) slidably inserted in the cavity (43). An elastic member (45) is fixedly connected between the sliding member (46) and the cavity (43). The top wall of the airbag (42) presses down on the sliding member (46) to contact the warning button (44).

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