CN219906825U - Lifting mechanism - Google Patents

Abstract

The utility model relates to the field of lifting equipment, in particular to a lifting mechanism which comprises a base, a rocker arm a, a transmission part a, a mounting rack, a rocker arm b, a rocker arm c and a supporting seat; a gear a is rotatably arranged in a groove a on the base through a pin shaft assembly a; the mounting frame is provided with a driving component; the rocker arm a is meshed and connected with the gear a through a transmission part a arranged on the pin shaft assembly c; the transmission part a and the rocker arm a are rotationally connected with the base through a pin shaft assembly b; the two rocker arms b are arranged in a crossing way and are connected through a pin shaft assembly e; the rocker arm a and the rocker arm b are rotationally connected with the mounting frame through a pin shaft assembly d; a gear b is rotatably arranged in a groove b arranged on the supporting seat through a pin shaft assembly g; one end of the rocker arm c is meshed with the connecting gear b through a transmission part b arranged on the pin shaft assembly i; the transmission part b and the rocker arm c are rotationally connected through a pin shaft assembly f, and the pin shaft assembly g is rotationally connected with the supporting seat. The lifting device is convenient to use and can stably lift the object to be lifted.

Description

Lifting mechanism

Technical Field

The utility model relates to the field of lifting equipment, in particular to a lifting mechanism.

Background

The existing lifting mechanism for the ground guarantee maintenance of the aircraft is a hydraulic lifting mechanism; however, the hydraulic lifting mechanism has the following technical problems in the use process:

1. the hydraulic lifting mechanism has risks of internal leakage and external leakage of hydraulic oil;

2. the rubber sealing ring adopted by the hydraulic lifting mechanism is difficult to meet the service life requirement of the munitions;

3. the hydraulic lifting mechanism is relatively complex to use and maintain.

Disclosure of Invention

The utility model aims to solve the problems in the background art and provides a lifting mechanism.

The technical scheme of the utility model is as follows: a lifting mechanism comprises a base, a rocker arm a, a transmission part a, a mounting rack, a rocker arm b, a rocker arm c and a supporting seat; the rocker arm a, the rocker arm b and the rocker arm c are respectively provided with four rocker arms;

the two bases are arranged side by side, and the upper end surface of each base is provided with a groove a; two gears a are respectively arranged in each groove a in a rotating way through two pin shaft assemblies a;

the two mounting frames are provided with driving assemblies for driving the two mounting frames to be far away from each other or close to each other;

one end of each rocker arm a in each group of rocker arms a is provided with a transmission part a through a pin shaft assembly c; each transmission part a corresponds to each gear a one by one and is in meshed connection; each transmission part a and each rocker arm a are rotationally connected with the base through a pin shaft assembly b;

the four rocker arms b are arranged in pairs in a group, two rocker arms b in each group are arranged in a crossing manner, and the crossing positions of the two rocker arms b arranged in the crossing manner are connected through a pin shaft assembly e; the other end of each rocker arm a and one end of each rocker arm b are rotationally connected with the mounting frame through a pin shaft assembly d;

the two support seats are arranged side by side, and the lower end face of each support seat is provided with a groove b; two gears b are respectively arranged in each groove b in a rotating way through two pin shaft assemblies g;

the four rocker arms c are in pairwise one group, each group of rocker arms c corresponds to the supporting seat one by one, and one end of each rocker arm c in each group of rocker arms c is provided with a transmission part b through a pin shaft assembly i; each transmission part b corresponds to each gear b one by one and is in meshed connection; the transmission part b and the rocker arm c on the same side are respectively connected with the supporting seat in a rotating way through two groups of pin shaft assemblies g; the other end of each rocker arm c is rotationally connected with the other end of each rocker arm b through a pin shaft assembly f.

Preferably, the driving assembly comprises a threaded rod, a box body, a crank, a bevel gear a, a bevel gear b and a guide rod;

the threaded rod is provided with a thread part a and a thread part b; the thread part a and the thread part b are symmetrically arranged and provided with reverse external threads, and the thread part a and the thread part b are respectively in threaded fit connection with the two mounting frames; the threaded rod is rotationally connected with the box body and extends into the box body;

the bevel gear b is provided with two bevel gears; the two bevel gears b are both positioned in the box body and are both connected with the threaded rod;

one end of the guide rod is connected with the box body, and the guide rod is connected with the mounting frame close to the box body in a sliding manner;

the two cranks are arranged and are respectively connected with the box body in a rotating way, the two cranks are positioned at two sides of the box body, the cranks are in one-to-one correspondence with the bevel gears a, and one end of each crank extends into the box body and is connected with the bevel gears a; each bevel gear a is in meshed connection with two bevel gears b.

Preferably, the projection shape of each crank is Z-shaped.

Preferably, the box body comprises an upper box body and a lower box body; the upper box body and the lower box body have the same structure and are hollow structures with one ends open, and the upper box body and the lower box body are connected through bolts.

Preferably, the number of guide bars is two.

Preferably, the pin assembly a, the pin assembly b, the pin assembly c, the pin assembly d, the pin assembly e, the pin assembly f, the pin assembly g, the pin assembly h and the pin assembly i have the same structure.

Preferably, the pin shaft assembly e comprises a pin shaft, a fastener, a cotter pin and a gasket;

one end of the pin shaft rod sequentially penetrates through the intersection of the two groups of rocker arms b which are arranged in a crossing way, and a limiting hole is formed in the peripheral surface of the other end of the pin shaft rod;

the gasket is sleeved at the other end of the pin shaft; the fastener is screwed into the other end of the pin shaft rod in a threaded fit manner and compresses the gasket; the cotter pin is inserted into the limiting hole and is positioned on one side of the fastener away from the gasket.

Preferably, the cross-sectional shape of the support base is U-shaped.

Preferably, the cross-sectional shape of the mounting frame is U-shaped.

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial technical effects:

the lifting mechanism provided by the utility model is driven in a manual mode, the crank is manually rocked to drive the threaded rod to rotate so as to drive the two mounting frames to move away from or close to each other, the rocker arm a, the rocker arm b and the rocker arm c are driven to rotate so as to adjust the distance between the supporting seat and the base, and then the supporting seat is used for lifting an object to be lifted.

Drawings

Fig. 1 is a perspective view of an embodiment of the present utility model.

Fig. 2 is a partially enlarged schematic view of the structure at a in fig. 1.

Fig. 3 is a partially enlarged schematic view of the structure at B in fig. 1.

Fig. 4 is a schematic structural view of the driving assembly in fig. 1.

Fig. 5 is a schematic view of the structure of the mounting case and crank in fig. 4.

Reference numerals: 1. a base; 101. a pin shaft assembly a; 102. a pin shaft assembly b; 2. a gear a; 3. a rocker arm a; 31. a pin shaft assembly c; 4. a transmission member a; 5. a mounting frame; 51. a pin shaft assembly d; 6. a rocker arm b; 71. a pin shaft lever; 72. a fastener; 73. a cotter pin; 74. a gasket; 8. a rocker arm c; 9. a pin assembly f; 10. a support base; 11. a pin shaft assembly g; 12. a pin shaft assembly h; 13. a drive assembly; 1301. a threaded rod; 1302. an upper case; 1303. a lower box body; 1304. a crank; 1305. bevel gear a; 1306. bevel gear b; 1307. a guide rod; 14. pin assembly i.

Detailed Description

Example 1

As shown in fig. 1-2, the lifting mechanism provided by the utility model comprises a base 1, a rocker arm a3, a transmission piece a4, a mounting frame 5, a rocker arm b6, a rocker arm c8 and a supporting seat 10; four rocker arms a3, b6 and c8 are respectively arranged;

the two bases 1 are arranged side by side, and the upper end surface of each base 1 is provided with a groove a; two gears a2 are respectively arranged in each groove a in a rotating way through two pin shaft assemblies a 101;

in an alternative embodiment, the lower end surface of each base 1 is provided with a fixing seat for cooperatively mounting the base 1 on a mobile device such as a cart or the like; the shape of the fixed seat is selected from but not limited to U-shaped, and is matched with a fixed mounting plate on the mobile equipment through bolts; the projection shape of each base 1 is U-shaped;

the two mounting frames 5 are arranged, the two mounting frames 5 are distributed side by side, and the two mounting frames 5 are provided with a driving assembly 13 for driving the two mounting frames 5 to be far away from each other or close to each other; the cross section of the mounting frame 5 is U-shaped, and the openings of the two U-shaped mounting frames 5 face the same direction;

the four rocker arms a3 are in a group by group, each group of rocker arms a3 corresponds to the base 1 one by one, two rocker arms a3 in each group of rocker arms a3 are distributed in an inverted splayed shape, and one end of each rocker arm a3 in each group of rocker arms a3 is provided with a transmission part a4 through a pin shaft assembly c 31;

each transmission part a4 corresponds to each gear a2 one by one, and each transmission part a4 is provided with gear teeth; the gear teeth are arranged in a plurality, the gear teeth are uniformly distributed along the peripheral surface of the transmission member a4, and the transmission member a4 is meshed with the connecting gear a2 through the gear teeth; each transmission piece a4 and each rocker arm a3 are rotatably connected with the base 1 through a pin shaft assembly b 102;

the four rocker arms b6 are arranged in pairs, two rocker arms b6 in each group are arranged in a crossing manner, and the crossing positions of the two rocker arms b6 arranged in the crossing manner are connected through a pin shaft assembly e;

the rocker arms b6 and the rocker arms a3 are in one-to-one correspondence; the other end of each rocker arm a3 and one end of each rocker arm b6 are rotatably connected with the mounting frame 5 through a pin shaft assembly d 51; the mounting frame 5 is U-shaped, one ends of the rocker arm a3 and the rocker arm b6 are positioned at the inner side of the U-shaped mounting frame 5 and are connected with the inner wall of the side end of the U-shaped mounting frame 5 in a matched manner through the pin shaft assembly d 51;

the two support seats 10 are arranged, the two support seats 10 are distributed side by side, and the lower end surface of each support seat 10 is provided with a groove b; two gears b are respectively arranged in each groove b in a rotating way through two pin shaft assemblies g 11; the cross section of the supporting seat 10 is U-shaped; the upper end surface of the supporting seat 10 is horizontally used for supporting an object to be lifted;

the four rocker arms c8 are in a group of two pairs, two rocker arms a3 in each group of rocker arms a3 are distributed in a splayed shape, each group of rocker arms c8 corresponds to the supporting seat 10 one by one, and one end of each rocker arm c8 in each group of rocker arms c8 is provided with a transmission part b through a pin shaft assembly i 14; each transmission part b corresponds to each gear b one by one and is in meshed connection; the meshing transmission structure of the transmission part b and the gear b is the same as the meshing transmission structure of the transmission part a3 and the gear a2;

the transmission part b and the rocker arm c8 on the same side are respectively connected with the supporting seat 10 in a rotating way through two groups of pin shaft assemblies g 11;

the other end of each rocker arm c8 is rotatably connected with the other end of each rocker arm b6 through a pin shaft assembly f 9.

Example two

As shown in fig. 4-5, compared with the first embodiment, the present embodiment also discloses a detailed structure of the driving assembly; the drive assembly 13 includes a threaded rod 1301, a case, a crank 1304, a bevel gear a1305, a bevel gear b1306, and a guide bar 1307;

the threaded rod 1301 has a threaded portion a and a threaded portion b; the thread part a and the thread part b are symmetrically arranged and provided with reverse external threads, and the thread part a and the thread part b are respectively in threaded fit connection with the two mounting frames 5; the threaded rod 1301 is rotationally connected with the box body and extends into the box body;

bevel gear b1306 is provided with two; two bevel gears b1306 are both positioned in the box body and are both connected with the threaded rod 1301; two bevel gears b1306 are symmetrically arranged;

one end of the guide rod 1307 is connected with the box body, and the guide rod 1307 is connected with the mounting frame 5 close to the box body in a sliding manner; the mounting seat 5 is provided with a through hole; the guide rod 1307 passes through the through hole and is connected with the inner wall of the through hole in a sliding way; the number of the guide rods 1307 is two, and one end, far away from the box body, of each guide rod 1307 is provided with a stop block;

the two crank handles 1304 are arranged and are respectively connected with the box body in a rotating way, the two crank handles 1304 are positioned at two sides of the box body, the crank handles 1304 are in one-to-one correspondence with the bevel gears a1305, and one end of each crank handle 1304 extends into the box body and is connected with the bevel gears a1305; the projection shape of each crank 1304 is Z-shaped;

each bevel gear a1305 is in engagement with two bevel gears b1306.

Example III

As shown in fig. 4-5, in the present embodiment, the lifting mechanism includes an upper case 1302 and a lower case 1303; the upper case 1302 and the lower case 1303 have the same structure and are hollow structures with one end open, and the upper case 1302 and the lower case 1303 are connected through bolts; the end surfaces of the upper case 1302 and the lower case 1303 provided with openings are bonded to form a case structure, and slots for mounting bearings are reserved in the upper case 1302 and the lower case 1303.

Example IV

As shown in fig. 1, in the lifting mechanism according to the present utility model, compared with the first embodiment, the pin assemblies a101, b102, c31, d51, e, f9, g11, h12 and i14 have the same structure.

Example five

As shown in fig. 3, in comparison with the fourth embodiment, the pin assembly e of the present utility model includes a pin shaft 71, a fastener 72, a cotter pin 73 and a spacer 74;

one end of the pin shaft rod 71 sequentially penetrates through the intersection of two groups of rocker arms b6 which are arranged in a crossing way, and a limiting hole is formed in the outer peripheral surface of the other end of the pin shaft rod 71;

the gasket 74 is sleeved at the other end of the pin shaft 71; the fastener 72 is screwed into the other end of the pin shaft 71 and presses the washer 74; cotter pin 73 is inserted into the limiting hole, and cotter pin 73 is located on one side of fastener 72 away from washer 74;

in an alternative embodiment, the pin shaft assembly e further comprises a limiting part, and both ends of the pin shaft lever 71 are provided with limiting holes; the gasket 74 and the rocker arm b6 which are arranged in a crossed manner are respectively arranged on the pin shaft rod 71 from two ends of the pin shaft rod 71, the other gasket 74 and the fastener 72 are respectively arranged at two ends of the pin shaft rod 71, the rocker arm b6 which is arranged in a crossed manner is arranged between the limiting part and the fastener 72, and the cotter pin 73 is inserted into the limiting hole to limit and prevent the fastener 72 from being separated from the pin shaft rod 71;

in another alternative embodiment, the pin shaft 71 in the pin shaft structures of the pin shaft assembly a101, the pin shaft assembly c31, the pin shaft assembly d51, the pin shaft assembly f9, the pin shaft assembly h12 and the pin shaft assembly i14 may be identical, and the projected shape of the pin shaft 71 is T-shaped;

the structures of the pin shaft 71 in the pin shaft assembly b102, the pin shaft assembly e and the pin shaft assembly g11 can be further improved according to the use requirement, for example, the pin shaft 71 in the pin shaft assembly e is provided with a limiting part and both ends are provided with limiting holes, and reasonable processing is performed according to the actual requirement.

In sum, this use elevating system cooperation that novel provides is installed on mobile device's mounting platform, when needs use elevating system to carry out the jacking to equipment or object, use drive assembly 13 to remove a plurality of supporting seats 10 towards one side of base 1, rotatory crank 1304 drives threaded rod 1301 and rotates and make two mounting brackets 5 keep away from each other and remove, until can stretch into the below of waiting lifting equipment or object with supporting seat 10, the rotatory threaded rod 1301 of counter-rotating crank 1304 drives and makes two mounting brackets 5 keep away from each other and remove again, contained angle between two rocking arms a3 in every group rocking arm a3, contained angle between the rocking arm b6 of cross arrangement and contained angle between two rocking arms c8 in every group rocking arm c8 all reduce, distance between supporting seat 10 and the base 1 increases in order to jack up equipment or object, easy operation convenient to use.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.

Claims (9)

1. The lifting mechanism is characterized by comprising a base (1), a rocker arm a (3), a transmission part a (4), a mounting rack (5), a rocker arm b (6), a rocker arm c (8) and a supporting seat (10); four rocker arms a (3), b (6) and c (8) are respectively arranged;

the two bases (1) are arranged side by side, and the upper end surface of each base (1) is provided with a groove a; two gears a (2) are respectively arranged in each groove a in a rotating way through two pin shaft assemblies a (101); the two mounting frames (5) are arranged, and the two mounting frames (5) are provided with driving assemblies (13) for driving the two mounting frames (5) to be far away from each other or close to each other;

one end of each rocker arm a (3) in each group of rocker arms a (3) is provided with a transmission part a (4) through a pin shaft assembly c (31); each transmission part a (4) corresponds to each gear a (2) one by one and is in meshed connection; each transmission part a (4) and each rocker arm a (3) are rotationally connected with the base (1) through a pin shaft assembly b (102);

the four rocker arms b (6) are arranged in a group by group, two rocker arms b (6) in each group are arranged in a crossing way, and the crossing parts of the two rocker arms b (6) arranged in the crossing way are connected through a pin shaft assembly e; the other end of each rocker arm a (3) and one end of each rocker arm b (6) are rotationally connected with the mounting frame (5) through the pin shaft assembly d (51);

two supporting seats (10) are arranged, the two supporting seats (10) are distributed side by side, and a groove b is formed in the lower end face of each supporting seat (10); two gears b are respectively arranged in each groove b in a rotating way through two pin shaft assemblies g (11);

the four rocker arms c (8) are in a group by group, each group of rocker arms c (8) corresponds to the supporting seat (10) one by one, and one end of each rocker arm c (8) in each group of rocker arms c (8) is provided with a transmission part b through a pin shaft assembly i (14); each transmission part b corresponds to each gear b one by one and is in meshed connection; the transmission part b and the rocker arm c (8) on the same side are respectively connected with the supporting seat (10) in a rotating way through two groups of pin shaft assemblies g; the other end of each rocker arm c (8) is rotationally connected with the other end of each rocker arm b (6) through a pin shaft assembly f (9).

2. A lifting mechanism according to claim 1, characterized in that the drive assembly (13) comprises a threaded rod (1301), a box, a crank (1304), a bevel gear a (1305), a bevel gear b (1306) and a guide bar (1307);

the threaded rod (1301) has a threaded portion a and a threaded portion b; the thread part a and the thread part b are symmetrically arranged and provided with reverse external threads, and the thread part a and the thread part b are respectively in threaded fit connection with two mounting frames (5); the threaded rod (1301) is rotationally connected with the box body and extends into the box body;

bevel gear b (1306) is provided with two; two bevel gears b (1306) are both positioned in the box body and are both connected with a threaded rod (1301);

one end of the guide rod (1307) is connected with the box body, and the guide rod (1307) is connected with the mounting frame (5) close to the box body in a sliding manner;

two crank handles (1304) are arranged and are respectively connected with the box body in a rotating way, the two crank handles (1304) are positioned at two sides of the box body, the crank handles (1304) are in one-to-one correspondence with the bevel gears a (1305), and one end of each crank handle (1304) extends into the box body and is connected with the bevel gears a (1305); each bevel gear a (1305) is connected with two bevel gears b (1306) in a meshing way.

3. The lift mechanism of claim 2, wherein each crank (1304) has a zigzag projected shape.

4. A lifting mechanism according to claim 2, wherein the housing comprises an upper housing (1302) and a lower housing (1303); the upper box body (1302) and the lower box body (1303) have the same structure and are hollow structures with one ends open, and the upper box body (1302) and the lower box body (1303) are connected through bolts.

5. A lifting mechanism according to claim 2, characterized in that the number of guide bars (1307) is two.

6. The lifting mechanism according to claim 1, wherein the pin assembly a (101), the pin assembly b (102), the pin assembly c (31), the pin assembly d (51), the pin assembly e, the pin assembly f (9), the pin assembly g (11), the pin assembly h (12) and the pin assembly i (14) have the same structure.

7. A lifting mechanism according to claim 6, characterized in that the pin assembly e comprises a pin shaft (71), a fastener (72), a cotter pin (73) and a spacer (74);

one end of the pin shaft lever (71) sequentially penetrates through the intersection of two groups of rocker arms b (6) which are arranged in a crossing way, and a limiting hole is formed in the outer peripheral surface of the other end of the pin shaft lever (71);

the gasket (74) is sleeved at the other end of the pin shaft (71); the fastener (72) is screwed into the other end of the pin shaft lever (71) in a threaded fit way and presses the gasket (74); a cotter pin (73) is inserted into the limiting hole, and the cotter pin (73) is positioned on one side of the fastener (72) away from the gasket (74).

8. A lifting mechanism according to claim 1, characterized in that the cross-sectional shape of the support (10) is a u-shape.

9. A lifting mechanism according to claim 1, characterized in that the cross-sectional shape of the mounting frame (5) is a u-shape.