CN219098642U

CN219098642U - Shearing fork lifting device of aviation food vehicle

Info

Publication number: CN219098642U
Application number: CN202222681546.0U
Authority: CN
Inventors: 文民青; 郭威
Original assignee: Hubei Hanggang Technology Co ltd
Current assignee: Hubei Hanggang Technology Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-05-30
Anticipated expiration: 2032-10-11

Abstract

The application provides a fork lifting device of aviation food car belongs to aviation auxiliary assembly technical field. The shearing fork lifting device comprises a rectangular bottom frame and a rectangular upper frame, wherein the upper frame and the bottom frame are horizontally arranged and are arranged at intervals in an upper-lower parallel mode, the upper frame and the bottom frame are connected through a group of inner shearing fork structures and a group of outer shearing fork structures, the middle part of the inner shearing fork structures is hinged with the middle part of the outer shearing fork structures, two lifting oil cylinders are arranged between the inner shearing fork structures and the outer shearing fork structures at intervals, and are respectively arranged at two side positions of the inner shearing fork structures and the two side positions of the outer shearing fork structures, and the two lifting oil cylinders are single-stage oil cylinders. The shearing fork lifting device is wide in shearing fork distance, and the chassis width of the aviation food vehicle is perfectly utilized, so that the wind resistance stability and the safety are improved during high-altitude operation.

Description

Shearing fork lifting device of aviation food vehicle

Technical Field

The utility model belongs to the technical field of aviation auxiliary vehicle equipment, relates to an aviation food vehicle, and particularly relates to a shearing fork lifting device of the aviation food vehicle.

Background

The aviation food vehicle is a special vehicle for airport and is specially used for passenger plane. The aviation food vehicle comprises a chassis and an upper assembly part, wherein the upper assembly part comprises a carriage body for storing food and a four-way platform arranged on one side of the carriage body. The chassis is connected with the upper assembly part through a lifting device, and the lifting device generally comprises a scissor fork and a hydraulic cylinder which are arranged on the chassis, wherein the hydraulic cylinder can drive the upper end of the scissor fork to rise so as to enable the upper assembly part to be close to a cabin door of the aircraft, and therefore food is conveyed to the aircraft.

At present, a shearing fork lifting device on an aviation food vehicle is driven by a single oil cylinder, the shearing fork width is narrow, and the wind resistance stability is poor. Or a small part of the hydraulic oil adopts a double oil cylinder, and the double oil cylinder is usually a multi-stage oil cylinder, and the multi-stage oil cylinder has better wind resistance stability, but the durability and the reliability of the multi-stage oil cylinder are inferior to those of a single-stage oil cylinder.

The patent in China (publication number: CN108569419A, publication day: 2018-09-25) discloses an aviation food vehicle, which comprises a chassis, a chassis part and an upper part, wherein the chassis is connected with the upper part through a fork frame, the upper part comprises a carriage body and a four-way platform arranged at one side of the carriage body, and a first hydraulic system and a second hydraulic system which are mutually independent are respectively arranged on the upper part and the chassis; the first hydraulic system is used for driving the upper assembly part to move so as to align with a cabin door of the aircraft; the second hydraulic system is used for driving the chassis component to support the chassis and driving the fork frame to lift. The first hydraulic system comprises an oil tank, a first hydraulic pump and a hydraulic cylinder for controlling the movement of the upper assembly part, and the second hydraulic system comprises an oil tank, a second hydraulic pump and a hydraulic cylinder for controlling the movement of the chassis part, and the oil discharge amount of the second hydraulic pump is larger than that of the first hydraulic pump.

In the patent document, although two hydraulic cylinders are designed, the two hydraulic cylinders are arranged in the middle of the fork frame, and the whole lifting device has poor stability in the lifting process.

Disclosure of Invention

The utility model provides a scissor lifting device of an aviation food vehicle aiming at the problems existing in the prior art, which aims to solve the technical problems that: how to improve the stability and reliability of the aviation food vehicle in the lifting process.

The application provides a fork lifting device that cuts of aviation food car adopts following technical scheme:

the utility model provides a fork lifting device of aviation food car, includes the underframe that is the rectangle and is the rectangle, the underframe sets up and parallel interval sets up about both with the underframe all the level, go up between frame and the underframe and be connected through a set of interior fork structure and a set of outer fork structure, interior fork structure the middle part with outer fork structure's middle part articulates mutually, interior fork structure with set up the interval between the outer fork structure and be provided with two lift cylinder, two lift cylinder sets up respectively interior fork structure with outer fork structure's both sides position, two lift cylinder is single-stage cylinder.

The principle is as follows: the aviation food vehicle comprises a chassis and a carriage body for storing food, the bottom frame in the technical scheme is arranged on the chassis of the aviation food vehicle, the carriage body for storing food can be placed on the upper frame, and the scissor lifting device in the technical scheme is mainly used for achieving the lifting function of the carriage body. The inner shearing fork structure and the outer shearing fork structure are driven to swing relatively through the two lifting cylinders, and the linear motion of the lifting cylinders is converted into lifting movement of the upper frame, so that the lifting of the upper frame is controlled, and the lifting of the carriage body is realized. The lifting mechanism in the technical scheme has the advantages of simple structure, compact space layout and stable and reliable operation.

The shearing fork lifting device has wider shearing fork distance, perfectly utilizes the chassis width of the aviation food vehicle, so that the wind resistance stability and the safety are improved during high-altitude operation, and the single-stage oil cylinder is adopted to be more stable and reliable.

Optionally, in the fork lifting device of the aviation food vehicle, the inner fork structure includes a first fork arm and a second fork arm which are arranged in parallel and at intervals; the first shearing fork arms and the second shearing fork arms are obliquely arranged, and the first shearing fork arms and the second shearing fork arms are fixedly connected through a plurality of first connecting cross beams; the outer shearing fork structure comprises a third shearing fork arm and a fourth shearing fork arm which are arranged in parallel at intervals; the third shearing fork arm and the fourth shearing fork arm are obliquely arranged, and the third shearing fork arm and the fourth shearing fork arm are fixedly connected through a plurality of second connecting cross beams; the inclination directions of the third shearing fork arm and the fourth shearing fork arm are opposite to those of the first shearing fork arm and the second shearing fork arm; the middle part of the first shearing fork arm is hinged with the middle part of the third shearing fork arm through a first pin shaft, and the middle part of the second shearing fork arm is hinged with the middle part of the fourth shearing fork arm through a second pin shaft; the first and second scissor arms are located between the third and fourth scissor arms.

Through adopting above-mentioned technical scheme for interior scissors structure and outer scissors structure mutually support, and the strong point is many, and the atress distributes more dispersedly, has further improved the steady reliability of this device.

Optionally, in the above-mentioned fork lifting device for an aviation food vehicle, the upper ends of the first and second fork arms are respectively hinged with two sides of one end of the upper frame, and the lower ends of the third and fourth fork arms are respectively hinged with two sides of one end of the bottom frame; the lower ends of the first shearing fork arm and the second shearing fork arm are respectively in rolling connection with two sides of the other end of the bottom frame, and the upper ends of the third shearing fork arm and the fourth shearing fork arm are respectively in rolling connection with two sides of the other end of the upper frame.

By adopting the technical scheme, when the lifting oil cylinder drives the inner fork structure and the outer fork structure to swing relatively, the relative position between the upper end of the inner fork structure and one end of the upper frame is kept unchanged, the lower end of the inner fork structure swings around the intersection point of the upper end, and the lower end of the inner fork structure rolls on the bottom frame, namely moves in the length direction of the bottom frame; the relative position between the lower end of the outer shear fork structure and one end of the bottom frame is kept unchanged, the upper end of the outer shear fork structure swings around the intersection point of the lower end, the upper end of the inner shear fork structure rolls on the upper frame, namely, the upper frame moves in the length direction of the upper frame, so that the upper frame can only lift in the vertical direction, and the whole action is accurate and reliable.

Optionally, in the fork lifting device of the aviation food cart, the bottom frame and the upper frame are formed by surrounding two longitudinal rods and two transverse rods, the two longitudinal rods are arranged in parallel at intervals, and the two transverse rods are respectively connected to two ends of the two longitudinal rods; two longitudinal rods in the bottom frame and opposite side surfaces of the two longitudinal rods in the upper frame are respectively provided with a sliding groove along the length direction of the longitudinal rods; the lower ends of the first shearing fork arm and the second shearing fork arm and the upper ends of the third shearing fork arm and the fourth shearing fork arm are respectively provided with a roller capable of being embedded into the sliding groove.

Through adopting above-mentioned technical scheme, utilize the cooperation structure of gyro wheel and spout, guarantee interior scissors structure and outer scissors structure action operation's stable reliability, and can prevent effectively that break away from the frame that breaks away from between each adapting unit.

Optionally, in the fork lifting device of the aviation food cart, a plurality of transverse connecting rods are fixedly arranged between two longitudinal rods of the bottom frame, and a plurality of longitudinal connecting rods are fixedly arranged between two transverse rods of the upper frame.

Optionally, in the above-mentioned aviation food cart fork lifting device, a first mounting frame is fixed between the first fork arm and the second fork arm, a second mounting frame is fixed between the third fork arm and the fourth fork arm, the cylinder bodies of the two lifting cylinders are rotatably connected to the second mounting frame through a shaft sleeve and a third pin shaft, and the two lifting cylinders are respectively located at two ends of the second mounting frame and near the positions of the third fork arm and the fourth fork arm; the output shafts of the two lifting cylinders are hinged to the first mounting frame through a fourth pin shaft, and the hinge points of the two lifting cylinders and the first mounting frame are respectively located at two ends of the first mounting frame and close to the positions of the first shearing fork arms and the second shearing fork arms.

Optionally, in the fork lifting device of the aviation food vehicle, two lifting cylinders are single-acting plunger cylinders, the two lifting cylinders are arranged in parallel at intervals, and the specific distance between the two lifting cylinders is at least 2 meters. The width that makes outer scissors fork structure can reach 2.45 meters among this technical scheme, simple structure, stability is strong.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the shearing fork lifting device in the technical scheme has wide shearing fork distance, and perfectly utilizes the chassis width of the aviation food vehicle so as to improve the wind resistance stability and the safety during high-altitude operation.

2. According to the technical scheme, the shearing fork lifting device adopts the single-acting plunger cylinder as the lifting cylinder, and the hinge point position of the single-acting plunger cylinder is subjected to strict calculation and simulation, so that the technical blank of lifting the double shearing fork by the single-acting cylinder is realized, the device is low in cost, high in reliability and easy to maintain, and the later use cost is reduced.

3. The scissor lifting device in the technical scheme adopts the shaft sleeve type hinge point to install the lifting oil cylinder, is convenient to install, is stable and reliable, is favorable for the action of the lifting oil cylinder, and avoids clamping.

Drawings

Fig. 1 is a schematic view of a first perspective structure of the scissor lift device.

Fig. 2 is a partially enlarged schematic structural view at a in fig. 1.

Fig. 3 is a schematic view of a second perspective structure of the scissor lift device.

100, a bottom frame; 200. an upper frame; 101. a longitudinal bar; 101a, a chute; 102. a cross bar; 103. a roller; 104. a transverse connecting rod; 105. a longitudinal connecting rod; 3. an inner scissors fork structure; 31. a first scissor arm; 32. a second scissor arm; 33. a first connecting beam; 4. an outer scissors fork structure; 41. a third scissor arm; 42. a fourth scissor arm; 43. a second connecting beam; 5. lifting the oil cylinder; 6. a first pin; 7. a second pin; 8. a first mounting frame; 9. a second mounting frame; 10. a shaft sleeve; 11. a third pin; 12. and a fourth pin shaft.

Detailed Description

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present utility model and are not intended to be limiting.

Referring to fig. 1 and 2, in this embodiment, the fork lifting device of the aviation food cart includes a rectangular bottom frame 100 and a rectangular upper frame 200, where the upper frame 200 and the bottom frame 100 are horizontally disposed and disposed at an upper and lower parallel interval, the upper frame 200 and the bottom frame 100 are connected by a set of inner fork structures 3 and a set of outer fork structures 4, the middle part of the inner fork structures 3 is hinged with the middle part of the outer fork structures 4, two lifting cylinders 5 are disposed between the inner fork structures 3 and the outer fork structures 4 at intervals, and the two lifting cylinders 5 are disposed at two side positions of the inner fork structures 3 and the outer fork structures 4, respectively, and the two lifting cylinders 5 are single-stage cylinders.

As shown in fig. 1 and 3, the inner fork structure 3 includes a first fork arm 31 and a second fork arm 32 arranged in parallel and spaced apart relation; the first shearing arm 31 and the second shearing arm 32 are obliquely arranged, and the first shearing arm 31 and the second shearing arm 32 are fixedly connected through a plurality of first connecting cross beams 33; the outer scissor structure 4 comprises a third scissor arm 41 and a fourth scissor arm 42 which are arranged in parallel at intervals; the third shearing arm 41 and the fourth shearing arm 42 are obliquely arranged, and the third shearing arm 41 and the fourth shearing arm 42 are fixedly connected through a plurality of second connecting cross beams 43; the inclination direction of the third and fourth scissor arms 41 and 42 is opposite to the inclination direction of the first and second scissor arms 31 and 32; the middle part of the first shearing arm 31 is hinged with the middle part of the third shearing arm 41 through a first pin shaft 6, and the middle part of the second shearing arm 32 is hinged with the middle part of the fourth shearing arm 42 through a second pin shaft 7; the first and second scissor arms 31 and 32 are each located between the third and fourth scissor arms 41 and 42; the inner scissors structure 3 and the outer scissors structure 4 are mutually matched and supported, the supporting points are more, the stress distribution is more dispersed, and the stability and the reliability of the device are improved.

As shown in fig. 1, the upper ends of the first and

second scissor arms

31 and 32 are respectively hinged to both sides of one end of the upper frame 200, and the lower ends of the third and

fourth scissor arms

41 and 42 are respectively hinged to both sides of one end of the bottom frame 100; the lower ends of the first and

second scissor arms

31 and 32 are respectively connected with two sides of the other end of the bottom frame 100 in a rolling manner, and the upper ends of the third and

fourth scissor arms

41 and 42 are respectively connected with two sides of the other end of the upper frame 200 in a rolling manner.

Specifically, the bottom frame 100 and the upper frame 200 are formed by surrounding two longitudinal bars 101 and two transverse bars 102, the two longitudinal bars 101 are arranged in parallel at intervals, and the two transverse bars 102 are respectively connected to two ends of the two longitudinal bars 101; a plurality of transverse connecting rods 104 are fixedly arranged between the two longitudinal rods 101 of the bottom frame 100, and a plurality of longitudinal connecting rods 105 are fixedly arranged between the two transverse rods 102 of the upper frame 200. The two longitudinal bars 101 in the bottom frame 100 and the opposite side surfaces of the two longitudinal bars 101 in the upper frame 200 are respectively provided with a sliding groove 101a along the length direction of the longitudinal bars 101; the lower ends of the first shearing arm 31 and the second shearing arm 32, and the upper ends of the third shearing arm 41 and the fourth shearing arm 42 are respectively provided with a roller 103 which can be embedded into the chute 101a; when the lifting cylinder 5 drives the inner fork structure 3 and the outer fork structure 4 to swing relatively, the relative position between the upper end of the inner fork structure 3 and one end of the upper frame 200 is kept unchanged, the lower end of the inner fork structure 3 swings around the junction of the upper end, and the lower end of the inner fork structure 3 rolls on the bottom frame 100, namely moves in the length direction of the bottom frame 100; the relative position of the lower end of the outer fork structure 4 and one end of the bottom frame 100 is kept unchanged, the upper end of the outer fork structure 4 swings around the junction of the lower end, the upper end of the inner fork structure 3 rolls on the upper frame 200, namely, moves in the length direction of the upper frame 200, so that the upper frame 200 can only lift in the vertical direction, and the whole action is accurate and reliable; by utilizing the matching structure of the roller 103 and the chute 101a, the stable reliability of the action and operation of the inner scissor structure 3 and the outer scissor structure 4 is ensured, and the separation of the connecting parts from the frame can be effectively prevented.

Referring to fig. 2, a first mounting frame 8 is fixed between a first shearing arm 31 and a second shearing arm 32, a second mounting frame 9 is fixed between a third shearing arm 41 and a fourth shearing arm 42, the cylinder bodies of two lifting cylinders 5 are rotatably connected to the second mounting frame 9 through a shaft sleeve 10 and a third pin shaft 11, and the two lifting cylinders 5 are respectively positioned at two ends of the second mounting frame 9 and close to the positions of the third shearing arm 41 and the fourth shearing arm 42; the output shafts of the two lifting cylinders 5 are hinged on the first mounting frame 8 through the fourth pin shaft 12, and the hinge points of the two lifting cylinders 5 and the first mounting frame 8 are respectively positioned at two ends of the first mounting frame 8 and close to the positions of the first shearing fork arm 31 and the second shearing fork arm 32.

In this embodiment, two lifting cylinders 5 are single-acting plunger cylinders, the two lifting cylinders 5 are arranged in parallel at intervals, and the specific distance between the two lifting cylinders 5 is at least 2 meters. The width of the outer shearing fork structure 4 can reach 2.45 meters in the technical scheme, and the outer shearing fork structure is simple in structure and strong in stability.

The principle of the embodiment is as follows: the aviation food cart comprises a chassis and a carriage body for storing food, wherein the bottom frame 100 is arranged on the chassis of the aviation food cart, the carriage body for storing food can be placed on the upper frame 200, and the scissor lifting device is mainly used for achieving the lifting function of the carriage body. The inner scissor structure 3 and the outer scissor structure 4 are driven to swing relatively through the two lifting cylinders 5, and the linear motion of the lifting cylinders 5 is converted into lifting movement of the upper frame 200, so that the lifting of the upper frame 200 is controlled, and the lifting of the carriage body is realized. The lifting mechanism in the embodiment has the advantages of simple structure, compact space layout and stable and reliable operation. The shearing fork lifting device has wider shearing fork distance, perfectly utilizes the chassis width of the aviation food vehicle, so that the wind resistance stability and the safety are improved during high-altitude operation, and the single-stage oil cylinder is adopted to be more stable and reliable.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a fork lifting device of aviation food car, includes and is rectangle underframe (100) and is rectangle underframe (200), underframe (200) and underframe (100) all set up and are parallel interval from top to bottom and set up, characterized in that, go up between frame (200) and underframe (100) and be connected through a set of interior fork structure (3) and a set of outer fork structure (4), the middle part of interior fork structure (3) with the middle part of outer fork structure (4) articulates mutually, set up the interval between interior fork structure (3) and outer fork structure (4) and be provided with two lift cylinder (5), two lift cylinder (5) are set up respectively interior fork structure (3) and the both sides position of outer fork structure (4), two lift cylinder (5) are single-stage cylinder; the inner scissor structure (3) comprises a first scissor arm (31) and a second scissor arm (32) which are arranged in parallel at intervals; the first shearing fork arms (31) and the second shearing fork arms (32) are obliquely arranged, and the first shearing fork arms (31) and the second shearing fork arms (32) are fixedly connected through a plurality of first connecting cross beams (33);

the outer shearing fork structure (4) comprises a third shearing fork arm (41) and a fourth shearing fork arm (42) which are arranged in parallel at intervals; the third shearing fork arms (41) and the fourth shearing fork arms (42) are obliquely arranged, and the third shearing fork arms (41) and the fourth shearing fork arms (42) are fixedly connected through a plurality of second connecting cross beams (43); the inclination directions of the third shearing arm (41) and the fourth shearing arm (42) are opposite to the inclination directions of the first shearing arm (31) and the second shearing arm (32);

the middle part of the first shearing fork arm (31) is hinged with the middle part of the third shearing fork arm (41) through a first pin shaft (6), and the middle part of the second shearing fork arm (32) is hinged with the middle part of the fourth shearing fork arm (42) through a second pin shaft (7); the first shearing arm (31) and the second shearing arm (32) are positioned between the third shearing arm (41) and the fourth shearing arm (42).

2. The scissors lifting device of the aviation food vehicle according to claim 1, wherein the upper ends of the first scissors arm (31) and the second scissors arm (32) are respectively hinged with two sides of one end of the upper frame (200), and the lower ends of the third scissors arm (41) and the fourth scissors arm (42) are respectively hinged with two sides of one end of the bottom frame (100); the lower ends of the first shearing fork arm (31) and the second shearing fork arm (32) are respectively in rolling connection with two sides of the other end of the bottom frame (100), and the upper ends of the third shearing fork arm (41) and the fourth shearing fork arm (42) are respectively in rolling connection with two sides of the other end of the upper frame (200).

3. The scissor lift device of an aviation food vehicle according to claim 2, wherein the bottom frame (100) and the upper frame (200) are formed by surrounding two longitudinal bars (101) and two transverse bars (102), the two longitudinal bars (101) are arranged at intervals in parallel, and the two transverse bars (102) are respectively connected to two ends of the two longitudinal bars (101); two longitudinal rods (101) in the bottom frame (100) and opposite side surfaces of the two longitudinal rods (101) in the upper frame (200) are respectively provided with a sliding groove (101 a) along the length direction of the longitudinal rods (101); the lower ends of the first shearing fork arm (31) and the second shearing fork arm (32) and the upper ends of the third shearing fork arm (41) and the fourth shearing fork arm (42) are respectively provided with a roller (103) which can be embedded into the sliding groove (101 a).

4. A scissor lift apparatus of an aviation food vehicle according to claim 3, wherein a plurality of transverse connection rods (104) are fixedly arranged between two longitudinal rods (101) of the bottom frame (100), and a plurality of longitudinal connection rods (105) are fixedly arranged between two transverse rods (102) of the upper frame (200).

5. The shearing fork lifting device of the aviation food vehicle according to claim 1, 2, 3 or 4, wherein a first mounting frame (8) is fixedly arranged between the first shearing fork arm (31) and the second shearing fork arm (32), a second mounting frame (9) is fixedly arranged between the third shearing fork arm (41) and the fourth shearing fork arm (42), the cylinder bodies of the two lifting cylinders (5) are rotatably connected to the second mounting frame (9) through shaft sleeves (10) and third pin shafts (11), and the two lifting cylinders (5) are respectively positioned at two ends of the second mounting frame (9) and are close to the positions of the third shearing fork arm (41) and the fourth shearing fork arm (42); the output shafts of the two lifting cylinders (5) are hinged to the first mounting frame (8) through fourth pin shafts (12), and the hinge points of the two lifting cylinders (5) and the first mounting frame (8) are respectively located at two ends of the first mounting frame (8) and close to the positions of the first shearing fork arms (31) and the second shearing fork arms (32).

6. The scissor lift arrangement of an aircraft food cart according to claim 1 or 2 or 3 or 4, characterized in that both lift cylinders (5) are single-acting ram cylinders, the two lift cylinders (5) being arranged in parallel spaced apart relationship, in particular at least 2 meters between the two lift cylinders (5).