Scissor lifting mechanism

Abstract

The utility model discloses a scissor lifting mechanism which comprises a jacking plate, a jacking assembly and a driving assembly. The jacking assembly comprises two scissor fork sets, an upper jacking rod and a lower jacking rod, wherein each scissor fork set is formed by hinging an outer jacking arm and an inner jacking arm. The driving assembly comprises a motor, a speed reducer, a crank and a push rod; the lower end of the outer jacking arm is rotatably connected to the mounting chassis, and the upper end is slidably connected to the lower side of the jacking plate; the lower end of the inner jacking arm is slidably connected to the mounting chassis, and the upper end is rotatably connected to the lower side of the jacking plate; one end of the upper ejector rod is rotationally connected to the push rod, and the other end of the upper ejector rod is rotationally connected to the upper ends of the two outer jacking arms; one end of the lower ejector rod is rotationally connected to the push rod, and the other end of the lower ejector rod is rotationally connected to the lower ends of the two inner jacking arms; the upper ejector rod and the lower ejector rod are arc-shaped, and the inner arc surfaces of the upper ejector rod and the lower ejector rod are oppositely arranged. The scissor lifting mechanism is simple in structure, small in overall mass, small in energy consumption and large in linear lifting stroke.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of shears fork lifting mechanism. BACKGROUND

[0002] The lifting mechanism of existing lurking vehicle is mostly using multi-connecting rod to link lifting mechanism. The part quantity of such multi-connecting rod structure is much, structure is complex, and the overall quality is larger, energy consumption is high, and the lifting mechanism is not in the form of ascending along straight line in ascending process, and the torsion and tension of mechanical whole are large, affect the service life and jacking stability of mechanical structure. SUMMARY

[0003] The utility model provides shears fork lifting mechanism to solve above-mentioned technical problem, and specifically adopt the following technical scheme:

[0004] A kind of shears fork lifting mechanism, comprising: jacking plate, jacking assembly and drive assembly;Jacking assembly includes: two groups of scissors fork group by outer jacking arm and inner jacking arm hinged, for pushing the upper top rod of outer jacking arm of two groups of scissors fork group and for pushing the lower top rod of inner jacking arm of two groups of scissors fork group;Drive assembly includes: motor, input end is connected to the speed reducer of motor, the output end of the speed reducer is connected to the crank and the push rod rotationally connected to the crank;The lower end of outer jacking arm is rotationally connected to mounting chassis, and the upper end is slidably connected to the lower side of jacking plate;The lower end of inner jacking arm is slidably connected to mounting chassis, and the upper end is rotationally connected to the lower side of jacking plate;One end of upper top rod is rotationally connected to push rod, and the other end is rotationally connected to the upper end of two outer jacking arms;One end of lower top rod is rotationally connected to push rod, and the other end is rotationally connected to the lower end of two inner jacking arms;Upper top rod and lower top rod are arc-shaped, and the inner arc surface of two is oppositely arranged;The two end points of upper top rod are located in the same straight line, and the two end points of lower top rod are located in the same straight line.

[0005] Further, upper top rod includes: two upper rotary rods rotationally connected to the two sides of push rod and upper follow-up rod;The upper end of two upper rotary rods is respectively fixed to the two ends of upper follow-up rod, to constitute the whole of pushing;Upper follow-up rod is rotationally connected to the upper end of two outer jacking arms by the upper top block formed at two ends;Two upper top blocks are respectively with corresponding upper rotary rod to constitute an arc-shaped whole;Lower top rod includes: two lower rotary rods rotationally connected to the two ends of push rod and lower follow-up rod;The lower end of two lower rotary rods is respectively fixed to the two ends of lower follow-up rod, to constitute the whole of pushing;Lower follow-up rod is rotationally connected to the lower end of two inner jacking arms by the lower top block formed at two ends;Two lower top blocks are respectively with corresponding lower rotary rod to constitute an arc-shaped whole.

[0006] Further, the two ends of the upper follower rod are formed with square insertion shafts for fixed connection to the upper rotary rods; the upper ends of the two upper rotary rods are formed with insertion holes for matching the square insertion shafts; the two ends of the lower follower rod are formed with square insertion shafts for fixed connection to the lower rotary rods; the lower ends of the two lower rotary rods are formed with insertion holes for matching the square insertion shafts.

[0007] Further, the upper end of the upper rotary rod is formed with an upper limiting surface; the two ends of the upper follower rod are respectively formed with upper matching surfaces for matching the upper limiting surface to limit the support of the upper top block; the lower end of the lower rotary rod is formed with a lower limiting surface; the two ends of the lower follower rod are respectively formed with lower matching surfaces for matching the lower limiting surface to limit the support of the lower top block.

[0008] Further, an upper push shaft is rotatably arranged between the two upper top blocks; the two ends of the upper push shaft are respectively rotatably connected to the upper ends of the corresponding outer jacking arms; a lower push shaft is rotatably arranged between the two lower top blocks; the two ends of the lower push shaft are respectively rotatably connected to the lower ends of the corresponding inner jacking arms.

[0009] Further, the upper end of the outer jacking arm is hingedly connected with an upper sliding block; the upper sliding block is slidingly arranged in a horizontal sliding groove arranged on the bottom side of the jacking plate; the two ends of the upper push shaft are respectively rotatably connected to the upper sliding blocks of the corresponding outer jacking arms; the lower end of the inner jacking arm is hingedly connected with a lower sliding block; the lower sliding block is slidingly arranged in a horizontal sliding groove arranged on the mounting base; the two ends of the lower push shaft are respectively rotatably connected to the lower sliding blocks of the corresponding inner jacking arms.

[0010] Further, a lower connecting rod is arranged between the lower ends of the two outer jacking arms to stabilize the relative structure between the lower ends of the two outer jacking arms; an upper connecting rod is arranged between the upper ends of the two inner jacking arms to stabilize the relative structure between the upper ends of the two inner jacking arms.

[0011] Further, a lower connecting shaft is rotatably arranged between the lower ends of the two outer jacking arms; the lower ends of the two outer jacking arms are rotatably connected to the lower connecting shaft; the two ends of the lower connecting shaft are fixed to the mounting base; an upper connecting shaft is rotatably arranged between the upper ends of the two inner jacking arms; the upper ends of the two inner jacking arms are rotatably connected to the upper connecting shaft; the two ends of the upper connecting shaft are fixed to the bottom side of the jacking plate.

[0012] Further, the lower connecting shaft is a square shaft; the two ends of the square shaft are respectively formed with rotary grooves for rotatably sleeving the lower ends of the corresponding outer jacking arms; bearings are arranged in the rotary grooves for rotatably supporting the lower ends of the corresponding outer jacking arms.

[0013] Further, the upper top block and the corresponding lower rotary rod are in rolling contact; the lower top block and the corresponding upper rotary rod are in rolling contact.

[0014] The shearing fork lifting mechanism has the advantages of simple structure, small overall quality, small energy consumption, and large linear lifting stroke. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the scissor lift mechanism of this utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the scissor lift mechanism from another perspective.

[0018] The scissor lift mechanism includes: 10, lifting plate 11, horizontal slide rail 111, outer lifting arm 12, upper push rod 13, upper rotating rod 131, upper limiting surface 132, upper follower rod 133, upper mating surface 134, upper lifting block 135, upper push shaft 14, upper slider 15, lower connecting rod 16, lower connecting shaft 17, rotating groove 171, bearing 18, inner lifting arm 19, lower push rod 20, lower rotating rod 201, lower limiting surface 202, lower follower rod 203, lower mating surface 204, lower lifting block 205, lower push shaft 21, lower slider 22, upper connecting rod 23, upper connecting shaft 24, insertion hole 25, motor 26, reducer 27, crank 28, and push rod 29. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0020] like Figures 1 to 2 As shown, a scissor lift mechanism 10 according to this application includes: a lifting plate 11, a lifting assembly and a drive assembly. The lifting plate 11 is installed above the lifting assembly, and the drive assembly is connected to the lifting assembly to drive the lifting assembly to lift, thereby raising and lowering the lifting plate 11.

[0021] Specifically, the jacking assembly includes two groups of scissor fork groups, an upper jacking rod and a lower jacking rod. The scissor fork group is hinged by an outer jacking arm 12 and an inner jacking arm 19. The upper jacking rod is used to push the outer jacking arm 12 of the two groups of scissor fork groups to perform the scissor fork action. The lower jacking rod is used to push the inner jacking arm 19 of the two groups of scissor fork groups to perform the scissor fork action. The drive assembly includes a motor 26, a speed reducer 27 connected to the motor 26, a crank 28 connected to the output end of the speed reducer 27, and a push rod 29 rotatably connected to the crank 28. When installed, the lower end of the outer jacking arm 12 is rotatably connected to the mounting chassis, and the upper end is slidably connected to the lower side of the jacking plate 11. The lower end of the inner jacking arm 19 is slidably connected to the mounting chassis, and the upper end is rotatably connected to the lower side of the jacking plate 11. Then one end of the upper jacking rod 13 is rotatably connected to the push rod 29, and the other end is rotatably connected to the upper end of the two outer jacking arms 12. Finally, one end of the lower jacking rod 20 is rotatably connected to the push rod 29, and the other end is rotatably connected to the lower end of the two inner jacking arms 19. The upper jacking rod and the lower jacking rod are both designed to be arc-shaped, and the inner arc surfaces of the two are oppositely arranged.

[0022] Specifically, the scissor lifting mechanism 10 drives the crank 28 to rotate through the motor 26, thereby driving the pushing end of the push rod 29 to move horizontally along the horizontal line. When the pushing end of the push rod 29 (in this scheme, a push shaft arranged at the end of the push rod 29) moves horizontally, it drives the upper jacking rod and the lower jacking rod to rotate relatively. That is, when the crank 28 rotates clockwise, the pushing end of the push rod 29 is driven to move leftward along the horizontal direction, the included angle between the upper jacking rod and the lower jacking rod increases, and the jacking is realized. When the crank 28 rotates counterclockwise, the pushing end of the push rod 29 is driven to move rightward along the horizontal direction, the included angle between the upper jacking rod and the lower jacking rod decreases, and the lowering is realized. When the included angle between the upper jacking rod and the lower jacking rod is maximum, an acute angle is formed between the push rod 29 and the plane where the pushing end of the push rod 29 is located, thereby ensuring the stability of the jacking structure. Here, the upper jacking rod and the lower jacking rod are both designed to be arc-shaped, and the inner arc surfaces of the two are oppositely arranged. By using the arch design of the arc shape, the stress of the overall jacking rod can be buffered, thereby further improving the stability of the jacking structure. Although the upper jacking rod and the lower jacking rod are both designed to be arc-shaped, the support lines of the main body parts of the two which mainly support are actually straight lines, i.e. the two end points of the upper jacking rod are located on the same straight line, and the two end points of the lower jacking rod are also located on the same straight line, thereby ensuring the reliability of the overall support structure of the jacking rod.

[0023] The overall scissor lifting mechanism 10 described above can only use the opening and closing structure of the upper jacking rod and the lower jacking rod to perform stable jacking operation on the jacking plate 11, the structure is simple, the overall quality is small, the energy consumption is small, and the lifting stroke of the scissor lifting mechanism 10 along the straight line is large.

[0024] As a specific embodiment, the upper jacking rod 13 comprises two upper rotating rods 131 rotatably connected to two sides of the push rod 29 and an upper follower rod 133. During installation, the upper ends of the two upper rotating rods 131 are fixed to the two ends of the upper follower rod 133 respectively to form a pushing whole, the upper follower rod 133 is rotatably connected to the upper ends of the two outer jacking arms 12 through the upper jacking blocks 135 formed at the two ends respectively, and the two upper jacking blocks 135 form an arc whole with the corresponding upper rotating rods 131 respectively. Through the upper rotating rods 131 and the upper follower rod 133, the jacking stress of the upper jacking rod is further dispersed, the structural stability of the upper jacking rod is further improved, and the service life is prolonged.

[0025] Specifically, the two ends of the upper follower rod 133 are formed with square shafts, the upper ends of the two upper rotating rods 131 are formed with insertion holes 25 matched with the square shafts, the upper follower rod 133 is fixedly connected to the upper rotating rods 131 by being inserted into the insertion holes 25 through the square shafts, the installation structure is simple, the installation efficiency is high, and the overall jacking performance of the upper jacking rod is ensured through the stress action of the multiple surfaces of the square shafts. At the same time, the upper ends of the upper rotating rods 131 are formed with upper limiting surfaces 132, the two ends of the upper follower rod 133 are formed with upper matching surfaces 134 respectively, the upper matching surfaces 134 can cooperate with the upper limiting surfaces 132 to limit the support of the upper jacking blocks 135, so as to further improve the jacking integrity of the jacking structure of the upper jacking rod and ensure the jacking performance of the overall structure.

[0026] As a further structure, an upper push shaft 14 is rotatably arranged between the two upper jacking blocks 135, and the two ends of the upper push shaft 14 are rotatably connected to the upper ends of the corresponding outer jacking arms 12. In this way, the two outer jacking arms 12 can be simultaneously pushed by the upper push shaft 14, the consistency of the jacking structure movement is improved, and the jacking operation is more stable. Specifically, the upper ends of the outer jacking arms 12 are hingedly connected with upper sliding blocks 15, the upper sliding blocks 15 are slidingly arranged in horizontal sliding grooves 111 arranged on the bottom side of the jacking plate 11, and the two ends of the upper push shaft 14 are rotatably connected to the upper sliding blocks 15 of the corresponding outer jacking arms 12. In this way, the stability of the jacking structure movement can also be improved through the cooperation of the sliding blocks and the horizontal sliding grooves 111.

[0027] As a specific embodiment, the lower top rod 20 comprises two lower rotating rods 201 and a lower follower rod 203, both ends of the lower rotating rods 201 are rotatably connected to the push rod 29, when installed, the lower ends of the two lower rotating rods 201 are fixed to both ends of the lower follower rod 203 to form a push whole, the lower follower rod 203 is rotatably connected to the lower ends of the two inner lifting arms 19 through the lower top blocks 205 formed at both ends, and the two lower top blocks 205 form an arc whole with the corresponding lower rotating rods 201. Such a structure design can further disperse the lifting stress of the lower top rod through the lower rotating rods 201 and the lower follower rod 203, further improve the structural stability of the lower top rod, and prolong the service life.

[0028] Specifically, both ends of the lower follower rod 203 are formed with square shafts, the upper ends of the two lower rotating rods 201 are formed with insertion holes 25 for matching the square shafts, and the lower follower rod 203 is fixedly connected to the lower rotating rods 201 by inserting the square shafts into the insertion holes 25. The installation structure is simple, the installation efficiency is high, and the stress is applied through multiple surfaces of the square shafts, which can ensure the overall lifting performance of the lower top rod. At the same time, the upper end of the lower rotating rod 201 is formed with a lower limiting surface 202, and both ends of the lower follower rod 203 are formed with lower matching surfaces 204, which can cooperate with the lower limiting surface 202 to limit the support of the lower top block 205, thereby further improving the lifting integration of the lifting structure of the lower top rod and ensuring the lifting performance of the overall structure.

[0029] As a further structure, the upper push shaft 14 is rotatably arranged between the two lower top blocks 205, and both ends of the lower push shaft 21 are rotatably connected to the upper ends of the corresponding inner lifting arms 19. Thus, the two inner lifting arms 19 can be simultaneously pushed by the lower push shaft 21, which can improve the consistency of the movement of the lifting structure and make the lifting operation more stable. Specifically, the upper end of the inner lifting arm 19 is hingedly connected with a lower sliding block 22, the lower sliding block 22 is slidingly arranged in a horizontal sliding groove 111 provided on the installation base, and both ends of the lower push shaft 21 are rotatably connected to the lower sliding blocks 22 of the corresponding inner lifting arms 19. Thus, the cooperation of the sliding block and the horizontal sliding groove 111 can also improve the stability of the movement of the lifting structure.

[0030] As a specific embodiment, the lower ends of the two outer lifting arms 12 are provided with a lower connecting rod 16 for stabilizing the relative structure between the lower ends of the two outer lifting arms 12, and the upper ends of the two inner lifting arms 19 are provided with an upper connecting rod 23 for stabilizing the relative structure between the upper ends of the two inner lifting arms 19.

[0031] As a specific embodiment, the lower ends of the two outer jacking arms 12 are provided with a lower connecting shaft 17, and the lower ends of the two outer jacking arms 12 are rotatably connected to the lower connecting shaft 17, and the two ends of the lower connecting shaft 17 are fixed to the mounting chassis, so that the lower ends of the two outer jacking arms 12 are strictly rotated around the same straight line through the lower connecting shaft 17, and the structure has higher operation precision. The upper ends of the two inner jacking arms 19 are provided with an upper connecting shaft 24, and the upper ends of the two inner jacking arms 19 are rotatably connected to the upper connecting shaft 24, and the two ends of the upper connecting shaft 24 are fixed to the bottom side of the jacking plate 11, so that the lower ends of the two inner jacking arms 19 are strictly rotated around the same straight line through the upper connecting shaft 24, and the structure has higher operation precision.

[0032] Further, the lower connecting shaft 17 is a square shaft, and the two ends of the square shaft are respectively formed with a rotating groove 171 for rotatably sleeving the lower end of the corresponding outer jacking arm 12, and a bearing 18 is arranged in the rotating groove 171 for rotatably supporting the lower end of the corresponding outer jacking arm 12. Such mounting structure is not only simple, but also has smaller overall installation volume and lighter quality, and can further define the end mounting position of the outer jacking arm 12 through the rotating groove 171.

[0033] As a specific embodiment, the upper top block 135 is in rolling contact with the corresponding lower rotating rod 201, and the lower top block 205 is in rolling contact with the corresponding upper rotating rod 131. Through such rolling contact structure, the upper top rod and the lower top rod can be supported by each other during the jacking operation, thereby improving the overall stability of the jacking structure.

[0034] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the above examples do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A scissor lift mechanism comprising: The jacking plate, jacking assembly and driving assembly are characterized in that The jacking assembly comprises two groups of scissor forks composed of outer jacking arms and inner jacking arms, an upper jacking rod for pushing the outer jacking arms of the two groups of scissor forks and a lower jacking rod for pushing the inner jacking arms of the two groups of scissor forks; The driving assembly comprises a motor, a speed reducer connected to the motor, a crank connected to the output end of the speed reducer and a push rod rotatably connected to the crank; The lower end of the outer jacking arm is rotatably connected to the mounting chassis, and the upper end is slidably connected to the lower side of the jacking plate; The lower end of the inner jacking arm is slidably connected to the mounting chassis, and the upper end is rotatably connected to the lower side of the jacking plate; One end of the upper jacking rod is rotatably connected to the push rod, and the other end is rotatably connected to the upper end of the two outer jacking arms; One end of the lower jacking rod is rotatably connected to the push rod, and the other end is rotatably connected to the lower end of the two inner jacking arms; The upper jacking rod and the lower jacking rod are both arc-shaped, and the inner arc surfaces of the two are oppositely arranged; The two end points of the upper jacking rod are located on the same straight line, and the two end points of the lower jacking rod are located on the same straight line.

2. The scissor lifting mechanism according to claim 1, characterized in that The upper jacking rod comprises two upper rotating rods rotatably connected to the two sides of the push rod and an upper follower rod; The upper ends of the two upper rotating rods are respectively fixed to the two ends of the upper follower rod to form a pushing whole; The upper follower rod is rotatably connected to the upper end of the two outer jacking arms through the upper jacking blocks formed at the two ends; The two upper jacking blocks respectively form an arc-shaped whole with the corresponding upper rotating rod; The lower jacking rod comprises two lower rotating rods rotatably connected to the two ends of the push rod and a lower follower rod; The lower ends of the two lower rotating rods are respectively fixed to the two ends of the lower follower rod to form a pushing whole; The lower follower rod is rotatably connected to the lower end of the two inner jacking arms through the lower jacking blocks formed at the two ends; The two lower jacking blocks respectively form an arc-shaped whole with the corresponding lower rotating rod.

3. The scissor lifting mechanism according to claim 2, characterized in that The two ends of the upper follower rod are formed with square insertion shafts for fixedly connecting to the upper rotating rods; The upper ends of the two upper rotating rods are formed with insertion holes for matching the square insertion shafts; The two ends of the lower follower rod are formed with square insertion shafts for fixedly connecting to the lower rotating rods; The lower ends of the two lower rotating rods are formed with insertion holes for matching the square insertion shafts.

4. The scissor lifting mechanism according to claim 3, characterized in that The upper end of the upper rotating rod is formed with an upper limiting surface; The two ends of the upper follower rod are respectively formed with upper matching surfaces for matching the upper limiting surface to limit the support of the upper jacking blocks; The lower end of the lower rotating rod is formed with a lower limiting surface; The two ends of the lower follower rod are respectively formed with lower matching surfaces for matching the lower limiting surface to limit the support of the lower jacking blocks.

5. The scissor lifting mechanism according to claim 2, characterized in that An upper push shaft is rotatably arranged between the two upper jacking blocks; Two ends of the upper pushing shaft are respectively rotationally connected to upper ends of the corresponding outer lifting arms; A lower pushing shaft is rotationally arranged between the two lower top blocks; Two ends of the lower pushing shaft are respectively rotationally connected to lower ends of the corresponding inner lifting arms.

6. The scissor lifting mechanism according to claim 5, characterized in that, An upper sliding block is hingedly connected to the upper end of the outer lifting arm; The upper sliding block is slidingly arranged in a horizontal sliding groove arranged on the bottom side of the lifting plate; Two ends of the upper pushing shaft are respectively rotationally connected to the upper sliding block of the corresponding outer lifting arm; A lower sliding block is hingedly connected to the lower end of the inner lifting arm; The lower sliding block is slidingly arranged in a horizontal sliding groove arranged on the mounting base; Two ends of the lower pushing shaft are respectively rotationally connected to the lower sliding block of the corresponding inner lifting arm.

7. The scissor lifting mechanism according to claim 1, characterized in that, A lower connecting rod is arranged between the lower ends of the two outer lifting arms for stabilizing the relative structure between the lower ends of the two outer lifting arms; An upper connecting rod is arranged between the upper ends of the two inner lifting arms for stabilizing the relative structure between the upper ends of the two inner lifting arms.

8. The scissor lifting mechanism according to claim 1, characterized in that, A lower connecting shaft is arranged between the lower ends of the two outer lifting arms; The lower ends of the two outer lifting arms are rotationally connected to the lower connecting shaft; Two ends of the lower connecting shaft are fixed to the mounting base; An upper connecting shaft is arranged between the upper ends of the two inner lifting arms; The upper ends of the two inner lifting arms are rotationally connected to the upper connecting shaft; Two ends of the upper connecting shaft are fixed to the bottom side of the lifting plate.

9. The scissor lifting mechanism according to claim 8, characterized in that, The lower connecting shaft is a square shaft; Two ends of the square shaft are respectively formed with rotation grooves for rotationally sleeving the lower ends of the corresponding outer lifting arms; Bearings are arranged in the rotation grooves for rotationally supporting the lower ends of the corresponding outer lifting arms.

10. The scissor lifting mechanism according to claim 2, characterized in that, The upper top block and the corresponding lower rotation rod are in rolling contact; The lower top block and the corresponding upper rotation rod are in rolling contact.

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