Parallel four-connecting-rod multi-stage lifting mechanism driven by electric push rod

Abstract

The utility model provides a parallel four-connecting-rod multi-stage lifting mechanism driven by electric push rods, and relates to the technical field of lifting devices. Comprising a bottom supporting seat, an upper supporting seat, a middle supporting part, side connecting rods, a first-stage lifting push rod and a second-stage lifting push rod, and a parallelogram structure is formed by the two side connecting rods located above or below the bottom supporting seat or the two side connecting rods located on the same side of the bottom supporting seat and arranged up and down, the bottom supporting seat and the middle supporting seat; the two side connecting rods located above or below the upper supporting base or the two side connecting rods located on the same side of the upper supporting base and arranged up and down, the upper supporting base and the middle supporting base form a parallelogram structure, the fixed end of the first-stage lifting push rod is movably connected with the bottom supporting base, and the movable end of the first-stage lifting push rod is connected with the middle supporting base. The fixed end of the secondary lifting push rod is movably connected with the middle supporting seat, and the movable end is connected with the upper supporting seat; the lifting height, the space utilization rate and the stability are high; and front-back translation is achieved, and the movement range is large.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting devices, in particular to a parallel four-link multi-stage lifting mechanism driven by an electric push rod. Background Art

[0002] At present, lifting mechanisms, as an important component of lifting machinery, play a key role in industrial automation, logistics and transportation, construction and other fields. Modern lifting mechanism technology is constantly innovating, with diversified forms such as electric hydraulic, self-propelled, and vehicle-mounted to meet the needs of different scenarios. Common lifting mechanisms include scissor-type hydraulic lifting mechanisms, straight-cylinder hydraulic lifting mechanisms, screw lifting mechanisms, chain lifting mechanisms, gear rack lifting mechanisms, pneumatic lifting mechanisms, etc. Existing lifting mechanisms have problems such as low lifting height, low space utilization, and insufficient stability of the lifting mechanism. Existing lifting mechanisms can only achieve lifting and lowering, but cannot achieve forward and backward translation, and their range of motion is small. Utility Model Content

[0003] The utility model provides a parallel four-link multi-stage lifting mechanism driven by an electric push rod. The existing technology has the problems of low lifting height, low space utilization, insufficient stability of the lifting mechanism; the lifting mechanism can only achieve lifting but not forward and backward translation, and its motion range is small.

[0004] In order to solve the above-mentioned problems, the technical solutions provided by the present invention are as follows:

[0005] The lifting mechanism comprises a bottom support seat and an upper support seat, wherein the front and rear sides of the bottom support seat are movably connected to one end of two side links arranged up and down, and the other end of the side links connected to the bottom support seat is movably connected to the middle support seat, the fixed end of the first-stage lifting push rod is movably connected to the bottom support seat, and the movable end is connected to the middle support seat; the front and rear sides of the upper support seat are movably connected to one end of two side links arranged up and down, and the other end of the side links connected to the upper support seat is movably connected to the middle support seat, and the fixed end of the second-stage lifting push rod is movably connected to the middle support seat, and the movable end is connected to the upper support seat.

[0006] The two side links located above or below the bottom support seat and the bottom support seat and the middle support seat form a parallelogram structure, and the two side links arranged up and down on the same side of the bottom support seat and the bottom support seat and the middle support seat form a parallelogram structure; the two side links located above or below the upper support seat and the upper support seat and the middle support seat form a parallelogram structure, and the two side links arranged up and down on the same side of the upper support seat and the upper support seat and the middle support seat form a parallelogram structure.

[0007] Preferably, the two side links located at the upper part of the bottom support seat are connected by a side link fixing piece, and the two side links located at the lower part are connected by a side link fixing piece; the two side links located at the upper part of the upper support seat are connected by a side link fixing piece, and the two side links located at the lower part are connected by a side link fixing piece.

[0008] Preferably, the first-stage lifting push rod is located between the side connecting rods on the front and rear sides of the bottom support seat.

[0009] Preferably, the secondary lifting push rod is located between the side connecting rods on the front and rear sides of the upper support seat.

[0010] Preferably, a push rod fixing pin is installed at the lower part of the bottom support seat, and the fixed end of the first-level lifting push rod is installed on the push rod fixing pin. Both ends of the push rod fixing pin extend outward from the bottom support seat and are installed with side connecting rods.

[0011] Preferably, an outrigger shaft is provided on the front and rear sides of the upper part of the bottom support seat, the inner ring of the bearing is mounted on the outrigger shaft, and a side connecting rod is mounted on the outer ring, and a fixed pressure cover supports the bearing and is connected to the outrigger shaft by screws.

[0012] Preferably, two push rod fixing pins arranged up and down are installed in the middle part of the intermediate support seat, and the fixed end of the secondary lifting push rod is installed on the push rod fixing pin located in the upper position, and the two ends of the push rod fixing pin extend outward from the bottom support seat and are installed with side connecting rods; the movable end of the primary lifting push rod is installed on the push rod fixing pin located in the lower position, and the two ends of the push rod fixing pin extend outward from the bottom support seat and are installed with side connecting rods.

[0013] Preferably, the upper and lower parts of the intermediate support seat are respectively provided with an outward-extending shaft, the inner ring of the bearing is mounted on the outward-extending shaft, and the outer ring is mounted with a side connecting rod, and the fixed pressure cover supports the bearing and is connected to the outward-extending shaft by screws.

[0014] Preferably, a push rod fixing pin is installed on the upper part of the upper support seat, and the movable end of the secondary lifting push rod is installed on the push rod fixing pin. Both ends of the push rod fixing pin extend outward from the bottom support seat and are installed with side connecting rods;

[0015] An outrigger shaft is provided on the front and rear sides of the lower part of the upper support seat, the inner ring of the bearing is mounted on the outrigger shaft, and a side connecting rod is mounted on the outer ring. A fixed pressure cover supports the bearing and is connected to the outrigger shaft by screws.

[0016] Preferably, a bearing is installed between the push rod fixing pin and the side connecting rod, and a fixed pressure cover supports the bearing and is connected to the push rod fixing pin by screws.

[0017] Compared with the prior art, the above technical solution has at least the following beneficial effects:

[0018] In the above scheme, the lifting device adopts a first-level electric push rod and a second-level electric push rod to control the lifting of each level respectively, and a parallelogram structure is formed between the side connecting rod and each support seat (upper support seat, middle support seat, and lower support seat), which ensures that the upper support seat and the bottom support seat always maintain parallel movement during the lifting process; through the coordinated control of the first-level lifting push rod and the second-level lifting push rod, the upper support seat can not only move up and down, but also translate back and forth within a certain range, thereby increasing its range of movement; the bottom support seat is fixed, the fixed end of the first-level lifting push rod is movably connected to the bottom support seat, and the movable end is connected to the middle support seat, and the fixed end of the second-level lifting push rod is movably connected to the middle support seat, and the movable end is connected to the upper support seat, thereby increasing the stability of the structure; the lifting mechanism solves the problems of low lifting height and low space utilization of the first-level lifting mechanism. The multi-stage lifting mechanism of this embodiment can achieve a higher lifting height and greater space utilization under the same space conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of a parallel four-link multi-stage lifting mechanism driven by an electric push rod of the present invention;

[0021] Figure 2 It is a cross-sectional view of the lower part of the bottom support seat, the side connecting rods, and the lower part of the middle support seat of the parallel four-link multi-stage lifting mechanism driven by the electric push rod of the present invention;

[0022] Figure 3 This is a structural diagram of the initial state of the parallel four-link multi-stage lifting mechanism driven by the electric push rod of the utility model;

[0023] Figure 4 Schematic diagram of the structure of the highest position state of the parallel four-link multi-stage lifting mechanism driven by the electric push rod of the utility model;

[0024] Figure 5 This is a structural diagram of the electric push rod driven parallel four-link multi-stage lifting mechanism of the present invention in a forward translation state;

[0025] Figure 6 It is a structural schematic diagram of the backward translation state of the parallel four-link multi-stage lifting mechanism driven by the electric push rod of the present invention.

[0026] The accompanying drawings are described as follows:

[0027] 1. Bottom support seat; 11. Upper part of bottom support seat; 12. Lower part of bottom support seat; 2. First-stage lifting push rod; 3. Upper support seat; 31. Upper part of upper support seat; 32. Lower part of upper support seat; 4. Side connecting rod; 5. Intermediate support seat; 51. Upper part of intermediate support seat; 52. Lower part of intermediate support seat; 53. Middle part of intermediate support seat; 6. Second-stage lifting push rod; 7. Side connecting rod fixing piece; 8. Fixed pressure cover; 9. Bearing; 10. Push rod fixing pin; 11. Extended shaft; d1. Forward translation distance; d2. Backward translation distance. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0030] It should be noted that the terms "up", "down", "left", "right", "front" and "back" used in the present invention are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0031] like Figure 1 and Figure 2As shown, this embodiment provides a parallel four-link multi-stage lifting mechanism driven by an electric push rod, including a bottom support seat 1 and an upper support seat 3, one end of two side links 4 arranged up and down are movably connected to the front and rear sides of the bottom support seat 1, the other end of the side link 4 connected to the bottom support seat 1 is movably connected to the middle support seat 5, the fixed end of the first-stage lifting push rod 2 is movably connected to the bottom support seat 1, and the movable end is connected to the middle support seat 5; the front and rear sides of the upper support seat 3 are movably connected to one end of two side links 4 arranged up and down, the other end of the side link 4 connected to the upper support seat 3 is movably connected to the middle support seat 5, and the second-stage lifting push rod The fixed end of the rod 6 is movably connected to the middle support seat 5, and the movable end is connected to the upper support seat 3; the two side connecting rods 4 located above or below the bottom support seat 1 and the bottom support seat 1 and the middle support seat 5 form a parallelogram structure, and the two side connecting rods 4 arranged up and down on the same side of the bottom support seat 1 and the bottom support seat 1 and the middle support seat 5 form a parallelogram structure; the two side connecting rods 4 located above or below the upper support seat 3 and the upper support seat 3 and the middle support seat 5 form a parallelogram structure, and the two side connecting rods 4 arranged up and down on the same side of the upper support seat 3 and the upper support seat 3 and the middle support seat 5 form a parallelogram structure. This embodiment employs a primary electric push rod and a secondary electric push rod to control each level of lifting, respectively. A parallelogram structure is formed between the side connecting rod 4 and each support base (upper support base 3, intermediate support base 5, and lower support base), ensuring that the upper support base 3 maintains parallel motion with the bottom support base 1 during lifting. Through the coordinated control of the primary lift push rod 2 and the secondary lift push rod 6, the upper support base 3 can not only move up and down but also translate forward and backward within a certain range, increasing its range of motion. The bottom support base 1 is stationary, while the primary lift push rod 2 has a fixed end that is movably connected to the bottom support base 1 and a movable end that is connected to the intermediate support base 5. The secondary lift push rod 6 has a fixed end that is movably connected to the intermediate support base 5 and a movable end that is connected to the upper support base 3, enhancing structural stability. The secondary lift push rod 6 has a fixed end that is movably connected to the intermediate support base 5. This embodiment's multi-stage lifting mechanism solves the problems of low lifting height and low space utilization associated with primary lift mechanisms. Within the same space, this embodiment's multi-stage lifting mechanism can achieve a higher lifting height and greater space utilization.

[0032] Specifically, the two side links 4 located at the upper part 11 of the bottom support seat are connected by the side link fixing member 7, and the two side links 4 located at the lower part 12 of the bottom support seat are connected by the side link fixing member 7; the two side links 4 located at the upper part 31 of the upper support seat are connected by the side link fixing member 7, and the two side links 4 located at the lower part 32 of the upper support seat are connected by the side link fixing member 7.

[0033] Specifically, an extension shaft 11 is provided on the front and rear sides of the upper portion 11 of the bottom support seat. The inner ring of the bearing 9 is mounted on the extension shaft 11, and the side link 4 is mounted on the outer ring. A fixed gland 8 supports the bearing 9 and is connected to the extension shaft 11 via screws. A push rod fixing pin 10 is installed on the lower portion 12 of the bottom support seat. The fixed end of the first-stage lifting push rod 2 is mounted on the push rod fixing pin 10. Both ends of the push rod fixing pin 10 extend outward from the bottom support seat 1 and are mounted with the side link 4. A bearing 9 is installed between the push rod fixing pin 10 and the side link 4. The fixed gland 8 supports the bearing 9 and is connected to the push rod fixing pin 10 via screws.

[0034] Specifically, an outrigger shaft 11 is provided on both sides of the upper portion 51 of the intermediate support seat. The inner ring of the bearing 9 is mounted on the outrigger shaft 11, and the outer ring is mounted on the side link 4. The fixed gland 8 supports the bearing 9 and is screwed to the outrigger shaft 11. Two push rod fixing pins 10 are installed in the middle portion 53 of the intermediate support seat, arranged vertically. The fixed end of the secondary lifting push rod 6 is mounted on the push rod fixing pin 10 located in the upper position. The two ends of the push rod fixing pin 10 extend outward from the bottom support seat 1 and are mounted with the side link 4. The movable end of the primary lifting push rod 2 is mounted on the push rod fixing pin 10 located in the lower position. The two ends of the push rod fixing pin 10 extend outward from the bottom support seat 1 and are mounted with the side link 4. A bearing 9 is installed between the push rod fixing pin 10 and the side link 4. The fixed gland 8 supports the bearing 9 and is screwed to the push rod fixing pin 10. An outrigger shaft 11 is provided on both sides of the lower part 52 of the intermediate support seat. The inner ring of the bearing 9 is installed on the outrigger shaft 11, and the side connecting rod 4 is installed on the outer ring. The fixed pressure cover 8 supports the bearing 9 and is connected to the outrigger shaft 11 by screws.

[0035] Specifically, the upper portion 31 of the upper support seat is mounted with a push rod fixing pin 10, onto which the movable end of the secondary lifting push rod 6 is mounted. Both ends of the push rod fixing pin 10 extend outward from the bottom support seat 1 and are mounted with the side connecting rod 4. A bearing 9 is mounted between the push rod fixing pin 10 and the side connecting rod 4. A fixed gland 8 supports the bearing 9 and is screwed to the push rod fixing pin 10. Extended shafts 11 are provided on the front and rear sides of the lower portion 32 of the upper support seat. The inner ring of the bearing 9 is mounted on the extended shaft 11, and the side connecting rod 4 is mounted on the outer ring. The fixed gland 8 supports the bearing 9 and is screwed to the extended shaft 11.

[0036] In this embodiment, the primary lift push rod 2 is located between the side links 4 on the front and rear sides of the bottom support base 1, and the secondary lift push rod 6 is located between the side links 4 on the front and rear sides of the upper support base 3. The primary and secondary lift push rods 2 and 6 are centrally located on the side links 4, providing greater stability. The side links 4 of this embodiment are mounted using bearings 9, reducing friction during movement and ensuring smoother movement.

[0037] The multi-stage lifting mechanism of this embodiment is shown in Figure 3. When the lifting height is the lowest, the upper support seat 3 is at the lowest position, and the first-stage lifting push rod 2 and the second-stage lifting push rod 6 are simultaneously retracted to the shortest position, the lifting mechanism remains in the initial state; Figure 4 As shown, the first-level lifting push rod 2 and the second-level lifting push rod 6 are simultaneously extended to their longest positions, and the upper support seat 3 is lifted vertically to the highest position; Figure 5 As shown, when the first-stage lifting push rod 2 is extended and the second-stage lifting push rod 6 is stationary, the lifting mechanism will be lifted while the upper support seat 3 moves forward relative to the bottom support seat 1, and the forward translation distance d1; Figure 6 As shown, when the first-stage lifting push rod 2 is stationary and the second-stage lifting push rod 6 is extended, the lifting mechanism is lifted while the upper support seat 3 is translated backward relative to the bottom support seat 1, and the translation distance d2 is successively achieved.

[0038] The above are only specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A parallel four-link multi-stage lifting mechanism driven by an electric push rod, characterized in that: The cam is connected to the bottom support base and the bottom support base at the front and rear sides thereof, and one end of two side connecting rods arranged up and down are movably connected respectively, and the other end of the side connecting rod connected to the bottom support base is movably connected to the middle support base, and the fixed end of the first-stage lifting push rod is movably connected to the bottom support base, and the movable end is connected to the middle support base; the front and rear sides of the upper support base are movably connected to one end of two side connecting rods arranged up and down, and the other end of the side connecting rod connected to the upper support base is movably connected to the middle support base, and the fixed end of the second-stage lifting push rod is movably connected to the middle support base, and the movable end is connected to the upper support base; The two side links located above or below the bottom support seat and the bottom support seat and the middle support seat form a parallelogram structure, and the two side links located above and below the same side of the bottom support seat and the bottom support seat and the middle support seat form a parallelogram structure; the two side links located above or below the upper support seat and the upper support seat and the middle support seat form a parallelogram structure, and the two side links located above and below the same side of the upper support seat and the upper support seat and the middle support seat form a parallelogram structure.

2. The parallel four-link multi-stage lifting mechanism driven by an electric push rod according to claim 1, characterized in that: The two side links located on the upper part of the bottom support seat are connected by side link fixing members, and the two side links located on the lower part are connected by side link fixing members; the two side links located on the upper part of the upper support seat are connected by side link fixing members, and the two side links located on the lower part are connected by side link fixing members.

3. The parallel four-link multi-stage lifting mechanism driven by an electric push rod according to claim 1, characterized in that: The first-stage lifting push rod is located between the side connecting rods on the front and rear sides of the bottom support seat.

4. The electric push rod driven parallel four-link multi-stage lifting mechanism according to claim 1, characterized in that: The secondary lifting push rod is located between the side connecting rods on the front and rear sides of the upper support seat.

5. The parallel four-link multi-stage lifting mechanism driven by an electric push rod according to claim 1, characterized in that: A push rod fixing pin is installed at the lower part of the bottom support seat, and the fixed end of the first-level lifting push rod is installed on the push rod fixing pin. Both ends of the push rod fixing pin extend outward from the bottom support seat and are installed with side connecting rods.

6. The electric push rod driven parallel four-link multi-stage lifting mechanism according to claim 5, characterized in that: An outrigger shaft is provided on the front and rear sides of the upper portion of the bottom support seat, the inner ring of the bearing is mounted on the outrigger shaft, a side connecting rod is mounted on the outer ring, and a fixed pressure cover supports the bearing and is connected to the outrigger shaft by screws.

7. The parallel four-link multi-stage lifting mechanism driven by an electric push rod according to claim 1, characterized in that: Two push rod fixing pins arranged up and down are installed in the middle part of the intermediate support seat, and the fixed end of the secondary lifting push rod is installed on the push rod fixing pin located in the upper position, and the two ends of the push rod fixing pin extend outward from the bottom support seat and are installed with side connecting rods; the movable end of the primary lifting push rod is installed on the push rod fixing pin located in the lower position, and the two ends of the push rod fixing pin extend outward from the bottom support seat and are installed with side connecting rods.

8. The parallel four-link multi-stage lifting mechanism driven by an electric push rod according to claim 1, characterized in that: The upper and lower parts of the intermediate support seat are respectively provided with outrigger shafts, the inner ring of the bearing is installed on the outrigger shaft, and the outer ring is installed with a side connecting rod, and a fixed pressure cover supports the bearing and is connected to the outrigger shaft by screws.

9. The parallel four-link multi-stage lifting mechanism driven by an electric push rod according to claim 1, characterized in that: A push rod fixing pin is installed on the upper part of the upper support seat, and the movable end of the secondary lifting push rod is installed on the push rod fixing pin. Both ends of the push rod fixing pin extend outward from the bottom support seat and are installed with side connecting rods; An outrigger shaft is provided on the front and rear sides of the lower part of the upper support seat, the inner ring of the bearing is mounted on the outrigger shaft, and a side connecting rod is mounted on the outer ring. A fixed pressure cover supports the bearing and is connected to the outrigger shaft by screws.

10. The electric push rod driven parallel four-link multi-stage lifting mechanism according to claim 5, 7 or 9, characterized in that: A bearing is installed between the push rod fixing pin and the side connecting rod, and a fixed pressure cover supports the bearing and is connected to the push rod fixing pin through screws.

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