Horizontal lifting equipment

Abstract

The utility model relates to the technical field of conveying equipment, and provides horizontal type lifting equipment which comprises a lifting table, and the two sides of the lifting table are each provided with a supporting plate. The two lifting mechanisms are respectively arranged below the supporting plates on the corresponding sides; the two lifting mechanisms drive the two supporting plates to ascend and descend synchronously, so that the lifting table ascends and descends in the vertical direction. The lifting mechanism is a shear fork type lifting mechanism; comprising a seat body which is arranged below a supporting plate; the fork arm group is connected with the seat body and the supporting plate and is used for driving the supporting plate to ascend or descend; the fork arm set comprises a first fork arm and a second fork arm which are arranged in an inclined and crossed mode and rotationally connected. The driving assembly is used for driving the first fork arm and the second fork arm to rotate around the rotating center point at the same time, so that the supporting plate ascends or descends. Therefore, by means of the mode that the lifting mechanisms are arranged on the two sides of the lifting table respectively, the structural limitation of existing lifting equipment is broken through, and the lower position of the lifting table can be attached to the ground. The structure is simple, the application range is wide, and various lifting mechanisms can be adapted.

Description

Technical Field

[0001] The utility model belongs to the technical field of conveying equipment, and in particular relates to a ground-level lifting device. Background Art

[0002] In the existing lifting equipment, such as the structures disclosed in Chinese patents CN115611197A, CN108178092A and CN211338652U, the lowest position of the loading board is also at a certain distance from the ground. Although technicians can optimize the volume of the components of the equipment to make the lowest position of the loading board as close to the ground as possible, due to the limitations of the equipment itself, the lowest position of the loading board will still be higher than the ground.

[0003] Some transport vehicles or AGV vehicles without lifting functions cannot directly place the goods on the loading platform. They need to be moved by equipment or manually. This brings inconvenience to the loading and unloading of goods.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] In view of the above-mentioned defects, the utility model mainly provides a ground-level lifting device to solve the technical problem that the lowest working position of the lifting device is higher than the ground.

[0006] In order to solve the above problems, the utility model provides a ground-level lifting device, comprising:

[0007] A lifting platform, with a support plate disposed on each side;

[0008] Two lifting mechanisms are respectively arranged below the supporting plate on the corresponding side;

[0009] The two lifting mechanisms are configured to drive the two support plates to rise and fall synchronously, thereby causing the lifting platform to perform a vertical lifting motion.

[0010] According to the ground-level lifting device of the utility model, a partition is further connected between the lifting platform and the supporting plate.

[0011] According to the ground-level lifting device of the utility model, the lifting mechanism is a scissor-type lifting mechanism; it includes:

[0012] A seat body, arranged below the support plate;

[0013] At least one fork arm group, connecting the seat body and the support plate, used to drive the support plate to rise or fall;

[0014] The fork arm group comprises a first fork arm and a second fork arm which are arranged obliquely and crosswise, and the middle parts of the two forks are connected in rotation; the position where the two forks are connected in rotation forms a rotation center point;

[0015] The driving assembly is used to drive the first fork arm and the second fork arm to rotate around the rotation center point at the same time, so that the supporting plate rises or falls.

[0016] According to the ground-level lifting device of the utility model, the fork arm groups are multiple groups connected in sequence; wherein: the fork arm group located at the bottom is connected to the seat body, and the fork arm group located at the top is connected to the support plate; the first fork arm and the second fork arm of two adjacent fork arm groups are respectively rotatably connected to the second fork arm and the first fork arm on the corresponding side.

[0017] According to the ground-level lifting device of the utility model, the first fork arm connected to the seat body, the lower end of the first fork arm is rotatably connected to the seat body, and a fixed fulcrum is formed at the position of the rotatable connection; the second fork arm connected to the seat body, the lower end of the second fork arm forms a sliding or rolling fit with the seat body;

[0018] A second fork arm connected to the support plate, the upper end of which is rotatably connected to the support plate; a first fork arm connected to the support plate, the upper end of which forms a sliding or rolling fit with the support plate.

[0019] According to the ground-level lifting device of the utility model, the lifting mechanism also includes:

[0020] A rail seat, fixedly mounted on the seat body, and provided with a rail;

[0021] The lifting assembly forms rolling contact with the track and the first fork arm respectively; the lifting assembly comprises a horizontally arranged wheel shaft, on which a lifting roller and a track wheel are rotatably sleeved; the lifting roller abuts against the first fork arm, and the track wheel abuts against the track;

[0022] The driving assembly is connected to the wheel axle of the lifting assembly; the driving assembly is configured to: apply tension to the wheel axle to move the track wheel along the track, thereby causing the lifting roller to push the first fork arm to rotate around the fixed fulcrum to lift the pallet.

[0023] According to the ground-level lifting device of the utility model, there are two tracks on the track seat; correspondingly, there are two lifting rollers and track wheels sleeved on the wheel axle.

[0024] According to the ground-level lifting device of the utility model, the driving assembly is a driving cylinder; the cylinder body of the driving cylinder is hingedly connected to the seat body, and the telescopic rod is hingedly connected to the wheel axle.

[0025] According to the ground-level lifting device of the utility model, the driving cylinder is an electric cylinder, a hydraulic cylinder or a pneumatic cylinder.

[0026] According to the ground-level lifting device of the utility model, the driving assembly includes a winch, a pull rope or a pull belt is wound around the winch, and the pull rope or the pull belt is also connected to the wheel axle.

[0027] In summary, the utility model breaks through the structural limitations of existing lifting equipment by respectively arranging lifting mechanisms on both sides of the lifting platform, so that the lower position of the lifting platform can be close to the ground. The structure is simple, the application range is wide, and it can be adapted to a variety of lifting mechanisms, with strong flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 It is a structural schematic diagram of the utility model in a working state;

[0030] Figure 3 It is a structural schematic diagram of the lifting mechanism of the utility model;

[0031] Figure 4 yes Figure 3 The structural diagram of the middle A direction;

[0032] Figure 5 It is a schematic diagram of the lifting working principle of the utility model;

[0033] Figure 6 It is a schematic diagram of force analysis of the wheel axle of the utility model;

[0034] Figure 7 It is a structural schematic diagram of an embodiment of the track of the utility model;

[0035] Figure 8 It is a structural schematic diagram of an embodiment of the track of the utility model;

[0036] Fig. 9 It is a structural schematic diagram of an embodiment of the track of the utility model;

[0037] Fig.10 It is a structural schematic diagram of an embodiment of the track of the utility model;

[0038] Fig.11 It is a structural schematic diagram of an embodiment of the drive assembly of the utility model;

[0039] In the figure: 1-base, 11-transverse groove, 12-transverse wheel, 13-fixed fulcrum; 2-first fork arm, 21-rotation center point; 3-second fork arm, 4-driving cylinder, 41-lifting roller, 42-track wheel, 43-wheel axle; 5-rail seat, 51-track, 52-horizontal section; 6-winch, 61-pull rope; 100-lifting platform, 101-support plate, 102-partition plate, 200-lifting mechanism. DETAILED DESCRIPTION

[0040] See also Figure 1 The utility model provides a ground-level lifting device, comprising:

[0041] The lifting platform 100 has a support plate 101 disposed on both sides thereof;

[0042] Two lifting mechanisms 200 are respectively arranged below the support plate 101 on the corresponding side;

[0043] The two lifting mechanisms 200 are configured to drive the two pallets 101 to rise and fall synchronously, thereby causing the lifting platform 100 to perform a vertical lifting motion;

[0044] Combination Figure 2 The lifting platform 100 and the pallet 101 have a predetermined distance in the vertical direction. When the lifting mechanism 200 falls to the ground, the lifting platform 100 can be attached to the ground. It is convenient to carry out the picking and placing operations of the goods on the lifting platform 100. It is also convenient to cooperate with the operation of transfer equipment such as AGV vehicles.

[0045] The lifting mechanism 200 of the utility model can select suitable known lifting equipment according to factors such as lifting load, lifting stroke, etc., such as hydraulic lifting equipment, scissor-type lifting equipment, etc.

[0046] Furthermore, a partition plate 102 is connected between the lifting platform 100 and the support plate 101, which is used to separate the goods from the lifting mechanism 200 to prevent the lifting mechanism 200 from touching the goods and causing damage to the goods when the lifting mechanism 200 is in motion.

[0047] The utility model breaks through the structural limitation of the existing lifting equipment by respectively arranging the lifting mechanisms 200 on both sides of the lifting platform 100, so that the lower position of the lifting platform 100 can be close to the ground. The structure is simple, the application range is wide, and it can be adapted to a variety of lifting mechanisms, and the flexibility is strong.

[0048] See also Figure 3 As an embodiment of the lifting mechanism 200 of the utility model, the lifting mechanism 200 is a scissor-type lifting mechanism; comprising:

[0049] The seat body 1 is arranged below the support plate 101;

[0050] At least one fork arm group, connecting the base body 1 and the support plate 101, and used for driving the support plate 101 to rise or fall;

[0051] The fork arm group includes a first fork arm 2 and a second fork arm 3 which are arranged obliquely and crosswise, and the middle parts of the two fork arms are connected in rotation; the position where the two fork arms are connected in rotation forms a rotation center point 21;

[0052] A driving assembly, used for driving the first fork arm 2 and the second fork arm 3 to rotate around the rotation center point 21 at the same time, so that the support plate 101 rises or falls;

[0053] According to the needs of the lifting stroke, the fork arm groups of the utility model can be multiple groups connected in sequence; such as two groups or three groups, etc. Among them: the fork arm group located at the bottom is connected to the seat body 1, and the fork arm group located at the top is connected to the support plate 101; the first fork arm 2 and the second fork arm 3 of the two adjacent fork arm groups are respectively rotatably connected to the second fork arm 3 and the first fork arm 2 on the corresponding side;

[0054] Combination Figure 3 As an embodiment, a first fork arm 2 connected to the seat body 1, the lower end of the first fork arm 2 is rotatably connected to the seat body 1, and a fixed fulcrum 13 is formed at the position of the rotatable connection; a second fork arm 3 connected to the seat body 1, the lower end of the second fork arm 3 forms a sliding or rolling fit with the seat body 1;

[0055] A second fork arm 3 connected to the support plate 101, the upper end of which is rotatably connected to the support plate 101; a first fork arm 2 connected to the support plate 101, the upper end of which forms a sliding or rolling fit with the support plate 101;

[0056] The sliding or rolling matching method of the present invention can be implemented by a structure known in the art, such as the matching of a rolling wheel and a wheel groove; or a linear slide rail structure, etc.

[0057] As an implementation mode, a transverse groove 11 is fixedly provided at the bottom of the support plate 101, and the upper end of the first fork arm 2 is connected to a transverse wheel 12; the transverse wheel 12 is rotatably arranged in the transverse groove 11;

[0058] Optionally, the cooperation mode between the lower end of the second fork arm 3 and the seat body 1 may also adopt the cooperation structure of the transverse shift groove 11 and the transverse shift wheel 12 .

[0059] See also Figure 4 , the lifting mechanism 200 further includes:

[0060] A rail seat 5 is fixed on the seat body 1, and a rail 51 is provided on the rail seat 5;

[0061] The lifting assembly forms rolling contact with the track 51 and the first fork arm 2 respectively; the lifting assembly comprises a horizontally arranged axle 43, on which a lifting roller 41 and a track wheel 42 are rotatably sleeved; the lifting roller 41 abuts against the first fork arm 2, and the track wheel 42 abuts against the track 51;

[0062] The driving assembly is connected to the wheel axle 43 of the lifting assembly; the driving assembly is configured to: apply a pulling force to the wheel axle 43 to move the track wheel 42 along the track 51, and then the lifting roller 41 pushes the first fork arm 2 to rotate around the fixed support point 13 to lift the support plate 101;

[0063] When the support plate 101 descends, the track wheel 42 is pushed to move in the opposite direction along the track 51 under the action of gravity, and the driving component applies a pulling force to the wheel shaft 43 to control the descending speed of the support platform 11.

[0064] As an embodiment, the driving assembly of the utility model is a driving cylinder 4; the cylinder body of the driving cylinder 4 is rotatably connected to the base body 1, and can also be rotatably connected to a support fixed on the ground. The telescopic rod of the driving cylinder 4 is rotatably connected to the wheel axle 43. Those skilled in the art can make adaptive selections according to actual usage scenarios.

[0065] Optionally, the rotation connection method of the present invention can be a hinge or other well-known structures.

[0066] Preferably, the drive cylinder 4 of the utility model is an electric cylinder; in the scenario where the lifting load is large, the drive cylinder 4 can also be a hydraulic cylinder. Optionally, in the scenario where the load is small, the drive cylinder 4 can also be a pneumatic cylinder.

[0067] See also Fig.11 As an embodiment, the driving assembly of the utility model includes a winch 6, on which a pull rope 61 is wound, and the pull rope 61 is also connected to the wheel axle 43; the winch 6 winds the pull rope 61 to generate tension on the wheel axle 43.

[0068] Optionally, the drawstring 61 of the present invention may also be replaced by a drawstring.

[0069] For the sake of clarity, the working principle of the present invention is described by taking the driving assembly as an embodiment of the driving cylinder 4. The effects of other embodiments of the driving assembly are the same as those of the driving cylinder 4 and will not be described in detail.

[0070] Combination Figure 5 , the weight of the object carried by the pallet 101 acts on the center of the pallet 101, and its load is recorded as: G 物 , fixed pivot 13 and G 物 The length of the lever arm is recorded as: L 物 ;

[0071] The lifting thrust exerted by the lifting roller 41 on the first fork arm 2 is recorded as: F 顶 , the arm length of the moment from the fixed support 13 is recorded as: L 顶 According to the common knowledge in this field, it can be known that the conditions for achieving jacking are: F 顶 *L 顶 ≥G 物 *L 物 ;

[0072] On the first fork arm 2, the distance between the fixed support point 13 and the rotation center point 21 is recorded as: L a ; Combining the geometric relationship in the figure, we can know that L 物 Always less than L a .

[0073] Combination Figure 5 Due to the travel limit of the track 51, during the lifting process of the support plate 101, the fixed support point 13 and the contact point between the lifting roller 41 and the first fork arm 2 are always located on both sides of the rotation center point 21. 顶 Always greater than L a .

[0074] Then we can know that L 顶 Always greater than L 物 .

[0075] Unlike the existing scissor lifts with smaller lever arms, the utility model has a larger lever arm and is a labor-saving structure. 顶 , to achieve the lifting of a larger load. The pulling force provided by the drive cylinder 4 generates a force component on the first fork arm 2 that only needs to meet the required F 顶 Compared with the prior art, under the same rated lifting load, the utility model significantly reduces the specification of the drive cylinder 4, reduces the manufacturing cost of the equipment and the energy consumption of operation.

[0076] The utility model sets a rail seat 5 and uses the rail 51 to support the rail wheel 42, so that the lifting roller 41 pushes the first fork arm 2 to achieve the lifting action. The utility model is a labor-saving structure, and a small lifting thrust F 顶 , to achieve the lifting of a larger load. The pulling force provided by the drive cylinder 4 generates a force component on the first fork arm 2 that only needs to meet the required F 顶 Compared with the prior art, under the same rated lifting load, the utility model significantly reduces the specification of the drive cylinder 4, reduces the manufacturing cost of the equipment and the energy consumption of operation.

[0077] In the initial state of the lifting action, the height of the support plate 101 is the lowest. 顶 maximum,

[0078] See also Figure 6 , the force exerted by the drive cylinder 4 on the wheel shaft 43 is recorded as: F 驱 ;

[0079] The lifting thrust exerted by the axle 43 on the first fork arm 2 through the lifting roller 41 is recorded as: F 顶 ;

[0080] The reaction force exerted by the first fork arm 2 on the wheel axle 43 is recorded as: F 压 ; It is easy to know F 压 =F 顶 ;

[0081] The reaction force of the track 51 on the track wheel 42 is recorded as: F 反 ;

[0082] It can be learned that: F 驱 With F 反 The combined force forms F 顶 ; and at any time, F 驱 、F 反 and F 压 The three must be balanced.

[0083] At any time during the lifting process, F 顶 The value of F 驱 With F 反 The angle between the two determines the F 驱 The value of also determines the output load of the drive component.

[0084] According to the parallelogram law, those skilled in the art can know that: 驱 With F 反 The angle between F and 驱 The size of the drive component can meet the F 顶 need.

[0085] Affected by the shape of track 51, during the entire lifting process, F 驱 With F 反 The angle between the two will change, so that F 驱 There will be a maximum value and a minimum value. Therefore, the pulling force provided by the driving cylinder 4 can smoothly complete the lifting action as long as it can produce the required lifting thrust.

[0086] As a preferred solution, the utility model can optimize the shape of the track 51 to make F 驱 The inventors conducted a large number of experiments to test the F 驱 The relationship between the lifting load of the equipment and the lifting load of the equipment. 驱The maximum value may not exceed 1.5 times of the jacking load, or even be less than the jacking load. Compared with the prior art, the specification of the driving cylinder 4 is greatly reduced.

[0087] The utility model provides various embodiments of the track 51 shape structure for different purposes:

[0088] See also Figure 7 As an embodiment of the track 51 structure, the track 51 is an arc-shaped structure; F 驱 With F 反 The angle is smaller, and the F 驱 Value, even F 驱 <F 顶 .

[0089] Moreover, during the lifting process of the arc, F 驱 With F 反 The angle of F 驱 The fluctuation range is small. Under the premise of certain load, a smaller drive cylinder 4 can be adapted to reduce equipment cost and energy consumption.

[0090] See also Figure 8 As an embodiment of the track 51 structure, the track 51 has a horizontal section 52 at the top; in this section, F 反 The direction is vertical, F 驱 With F 反 The angle between F 驱 <F 顶 , reducing the required output load of the drive cylinder 4. At the same time, it is beneficial for the drive cylinder 4 to maintain the jacking posture, making it convenient for the lift to carry out the transportation operation of loading and unloading goods in this state.

[0091] See also Fig. 9 As an embodiment of the track 51 structure, the track 51 is an inclined straight structure; when the horizontal stroke of the track wheel 42 is the same, the vertical stroke can be increased. It is suitable for situations where the lifting range is large.

[0092] See also Fig.10 As an embodiment of the track 51 structure, the track 51 structure includes an inclined straight section and an arc section connected to each other; in the initial stage of lifting, a large lifting thrust needs to be provided. At this time, the track 51 is an arc structure, which reduces the F of the drive cylinder 4. 驱 ; Afterwards, the vertical lifting distance can be increased on the inclined straight structure, taking into account the vertical stroke.

[0093] Preferably, based on the consideration of force balance, the number of the rails 51 is two; correspondingly, the number of the lifting rollers 41 and the number of the rail wheels 42 sleeved on the wheel axle 43 are both two.

[0094] In summary, the utility model provides a ground-level lifting device, which breaks through the structural limitations of existing lifting devices by arranging lifting mechanisms on both sides of the lifting platform, so that the lower position of the lifting platform can be close to the ground. It has a simple structure, a wide range of applications, can be adapted to a variety of lifting mechanisms, and has strong flexibility.

[0095] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A ground-level lifting device, characterized in that: include: A lifting platform, with a support plate disposed on each side; Two lifting mechanisms are respectively arranged below the supporting plate on the corresponding side; The two lifting mechanisms are configured to drive the two support plates to rise and fall synchronously, thereby causing the lifting platform to perform a vertical lifting motion.

2. The horizontal lifting device according to claim 1, characterized in that: A partition is also connected between the lifting platform and the supporting plate.

3. The horizontal lifting device according to claim 1 or 2, characterized in that: The lifting mechanism is a scissor-type lifting mechanism; comprising: A seat body, arranged below the support plate; At least one fork arm group, connecting the seat body and the support plate, used to drive the support plate to rise or fall; The fork arm group includes a first fork arm and a second fork arm which are arranged obliquely and crosswise, and the middle parts of the two forks are connected in rotation; the position where the two forks are connected in rotation forms a rotation center point; The driving assembly is used to drive the first fork arm and the second fork arm to rotate around the rotation center point at the same time, so that the supporting plate rises or falls.

4. The horizontal lifting device according to claim 3, characterized in that: The fork arm groups are multiple groups connected in sequence; wherein: the fork arm group located at the bottom is connected to the seat body, and the fork arm group located at the top is connected to the support plate; the first fork arm and the second fork arm of two adjacent fork arm groups are respectively rotatably connected to the second fork arm and the first fork arm on the corresponding side.

5. The horizontal lifting device according to claim 3, characterized in that: A first fork arm connected to the seat body, the lower end of the first fork arm is rotatably connected to the seat body, and a fixed fulcrum is formed at the position of the rotatable connection; a second fork arm connected to the seat body, the lower end of the second fork arm forms a sliding or rolling fit with the seat body; A second fork arm connected to the support plate, the upper end of which is rotatably connected to the support plate; a first fork arm connected to the support plate, the upper end of which forms a sliding or rolling fit with the support plate.

6. The horizontal lifting device according to claim 5, characterized in that: The lifting mechanism also includes: A rail seat, fixedly mounted on the seat body, and provided with a rail; The lifting assembly forms rolling contact with the track and the first fork arm respectively; the lifting assembly comprises a horizontally arranged wheel shaft, on which a lifting roller and a track wheel are rotatably sleeved; the lifting roller abuts against the first fork arm, and the track wheel abuts against the track; The driving assembly is connected to the wheel axle of the lifting assembly; the driving assembly is configured to: apply tension to the wheel axle to move the track wheel along the track, thereby causing the lifting roller to push the first fork arm to rotate around the fixed fulcrum to lift the pallet.

7. The horizontal lifting device according to claim 6, characterized in that: There are two tracks on the rail seat; correspondingly, there are two lifting rollers and track wheels sleeved on the wheel axle.

8. The horizontal lifting device according to claim 6 or 7, characterized in that: The driving assembly is a driving cylinder; the cylinder body of the driving cylinder is hingedly connected to the seat body, and the telescopic rod is hingedly connected to the wheel axle.

9. The horizontal lifting device according to claim 8, characterized in that: The driving cylinder is an electric cylinder, a hydraulic cylinder or a pneumatic cylinder.

10. The horizontal lifting device according to claim 6 or 7, characterized in that: The driving assembly comprises a winch, a pull rope or a pull belt is wound around the winch, and the pull rope or the pull belt is also connected to the wheel axle.

Images