CN220300285U - Mechanical jack - Google Patents

Abstract

The utility model relates to the technical field of jacks and provides a mechanical jack which comprises a main body assembly, an upper connecting assembly, a lower connecting assembly, a driving assembly and a limiting assembly, wherein the upper connecting assembly and the lower connecting assembly are sleeved on the outer side wall of the main body assembly, the driving assembly is hinged to one side of the upper connecting assembly and one side of the lower connecting assembly, and the limiting assembly is arranged on the front surface of the upper connecting assembly.

Description

Mechanical jack

Technical Field

The utility model relates to the technical field of jacks, in particular to a mechanical jack.

Background

The jack is characterized in that a rigid jacking piece is used as a working device and is divided into a mechanical jack, a hydraulic jack and the like, the jack jacks a heavy object in a small stroke through a top bracket or a bottom bracket claw, and the jack is mainly used for departments such as factories and mines, transportation and the like to work as vehicles for repairing, other lifting, supporting and the like.

At present, current jack base is mosaic structure, encircle a plurality of triangle-shaped risers that are used for supporting and dispersion power around the bottom plate promptly, these risers welding are on the bottom plate, because the jack not only bears the ascending power of vertical direction, still there is the stress of incline direction, and welding point long-time atress can appear welding seam even the cracked condition of welding point, greatly reduced the intensity of base, and current jack sets up the handle as detachable construction, if be used for collocating other instrument with the handle of dismantling in the open-air environment and use, the condition of bending or deformation appears easily, the mode of detachable handle does not play the promotion effect to portability, influence the pole on the effect of being connected of jack on the contrary, the condition that unable adaptation leads to unable use appears even.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a mechanical jack.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a mechanical jack comprises a main body assembly, an upper connecting assembly, a lower connecting assembly, a driving assembly and a limiting assembly, wherein the upper connecting assembly and the lower connecting assembly are sleeved on the outer side wall of the main body assembly, the driving assembly is hinged to one side of the upper connecting assembly and one side of the lower connecting assembly, and the limiting assembly is arranged on the front surface of the upper connecting assembly.

Wherein, main part subassembly includes the base, inserts and establishes at the inside pole climbing of base and install the couple at pole climbing top, the through-hole has evenly been seted up to the lateral wall of pole climbing, go up coupling assembling and lower coupling assembling all overlaps and establish the lateral wall at the pole climbing, drive assembly is including setting up in handle, integrated into one piece in the drive plate of handle bottom and articulating in the connecting plate at drive plate middle part in pole climbing one side, the bottom of connecting plate articulates in one side of coupling assembling down, the bottom of drive plate is the arc setting and articulates one side that is used for last coupling assembling, the one end that the drive plate is close to the pole climbing is connected with the cardboard.

The utility model is further provided with: the upper connecting assembly comprises a first connecting block sleeved on the outer side wall of the climbing pole, a fixed block and a first frame connected to the front surface of the first connecting block, a first hinging seat connected to one side of the first connecting block, and a bearing seat connected to the other side of the first connecting block.

The climbing pole is arranged in the first hinge seat in a penetrating mode, the first hinge seat is arranged on the top of the driving plate, the first hinge seat is arranged on the bottom of the first connecting block, the first hinge seat is arranged on the top of the driving plate, the first hinge seat is arranged on the front surface of the first frame, the first hinge seat is arranged on the front surface of the first hinge seat, and the first hinge seat is arranged on the front surface of the first hinge seat.

The utility model is further provided with: the first bolt comprises a first pin body penetrating through the first positioning hole, a first inclined part I arranged at one end of the first pin body and a first spring sleeved on the outer side wall of the first pin body, wherein the first inclined part I is positioned at one end, close to the first connecting block, of the first pin body and is inserted into a through hole inserted into the outer side wall of the climbing pole, and two ends of the first spring are respectively attached to the outer wall of the first connecting block and the inner wall of the first frame.

Through adopting above-mentioned technical scheme, the base is integrated into one piece casting shaping structure, its advantage is alleviating jack holistic stress, guarantee jack's standing stability, the intensity of base has been guaranteed, avoid taking place the fracture condition, place in station department when the jack, bear the seat and the work piece wait to promote department bottom laminating, drive assembly is used for carrying out the drive to bear seat and bear the last coupling assembling at seat place and climbs, handle and drive plate on the drive assembly are both cooperated as an organic whole structure, this sets up the connection stability that increases handle and drive plate, along with handle and drive plate by pushing down and make it swing downwards, and connecting assembly is in steady state this moment, consequently, connecting assembly is exerted a holding power to the drive plate through the connecting plate down, the drive plate swings along this holding point, the hinge point of drive plate and first hinge piece is gone up, cause first connecting block to slide in the pole climbing outside, and the first round pin body of inserting in the pole climbing through-hole is extruded, the first round pin body is followed in the through-hole, first connecting block is free state and is upwards moved by the thrust body, and is upwards moved up the body, thereby make the work piece is continued to be connected to the through-hole with the upper position of the work piece, thereby the work piece is continued to be connected to the high position when the first connecting assembly is pushed up.

The utility model is further provided with: the lower connecting assembly comprises a second connecting block sleeved on the outer side wall of the climbing pole, a second frame connected to the front surface of the second connecting block, and a second hinging seat arranged on one side, close to the driving assembly, of the second connecting block.

The second locating hole is formed in the top of the second connecting block, the climbing rod penetrates through the second locating hole, the bottom of the connecting plate is hinged to the second hinging seat, the second locating hole is formed in the front surface of the second frame, the second locating hole penetrates through the second locating hole, the second bolt is arranged on the top of the second frame and comprises a second pin body, the second pin body penetrates through the second locating hole, an inclined part II is formed in one end, close to the second connecting block, of the second pin body, a second spring is sleeved on the outer side wall of the second pin body, and two ends of the second spring are respectively attached to the inner wall of the second locating hole and the outer wall of the second connecting block.

The utility model is further provided with: the limiting assembly comprises a limiting plate, a positioning groove is formed in the front surface of the limiting plate, the fixing block is inserted into the positioning groove, a third spring is connected between the bottom of the fixing block and the inner wall of the positioning groove, a first wedge block and a second wedge block are vertically arranged on the front surface of the limiting plate, and the inclined surfaces of the first wedge block and the second wedge block are downwards arranged.

The utility model is further provided with: the front surface of the first connecting block is connected with a positioning column, the end part of the positioning column is hinged with a limiting rod, the limiting rod is positioned on the front surface of the limiting plate, and the limiting rod is attached to the inner wall of the limiting plate

Through adopting above-mentioned technical scheme, after the distance of a through-hole on the climbing pole of last coupling assembling upwards climbs, handle and drive plate are in the state of pushing down, when handle and drive plate are to vertical state swing, the supporting point of drive plate changes, the pin joint of drive plate and first articulated seat is as the supporting point, and the pin joint of drive plate and connecting plate upwards moves and promotes, and the whole body of connecting plate can upwards move, cause the connecting plate bottom to pull the second articulated seat on the second connecting block, the second articulated seat drives the second connecting block and upwards moves, the second bolt is extruded this moment, the second bolt is the same with the structure and the theory of operation of first bolt, cause the second bolt upwards to remove the distance of a through-hole, thereby realize going up coupling assembling and lower coupling assembling and upwards move the purpose of climbing.

The limiting assembly can move upwards along with the upper connecting assembly, the second wedge-shaped block is used for controlling the lower connecting assembly to move upwards by the distance of one through hole each time, when the upper connecting assembly needs to move downwards, the limiting rod swings downwards, the elastic force of the third spring pushes the limiting plate to move downwards, the first wedge-shaped block and the second wedge-shaped block are respectively attached to the first bolt and the second bolt to limit, the first bolt and the second bolt can only move downwards, the handle and the driving plate swing downwards, the hinge point of the driving plate and the first hinge seat serves as a supporting point, the hinge point of the driving plate and the connecting plate moves downwards to descend, the second bolt is removed from the through hole and moves downwards by the distance of one through hole under the pushing force of the third spring, then the hinge point of the connecting plate and the driving plate serves as a supporting point, the arc-shaped position of the driving plate pushes the first hinge seat and the upper connecting assembly to integrally move downwards by the distance of one through hole, and the handle swings upwards, and accordingly the purpose of lowering the upper connecting assembly and the lower connecting assembly is achieved.

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

the utility model provides a through setting up the base as integrative cast structure, its advantage is alleviated jack holistic stress, guarantees jack's standing stability, and does not have the welding seam on the base, has guaranteed the intensity of base, avoids taking place the fracture condition, and handle and drive plate on the drive assembly are both cooperated as an organic whole structure, and the cardboard is accomodate the handle to pole-climbing one side, does not cause the influence to portable degree to the integrated structure has increased the connection stability of handle and drive plate.

Drawings

Fig. 1 is a schematic diagram of a front view structure of the present utility model.

Fig. 2 is a schematic diagram of a driving assembly structure of the present utility model.

Fig. 3 is a schematic structural view of an upper connecting assembly according to the present utility model.

Fig. 4 is a schematic structural view of a lower connecting assembly according to the present utility model.

Fig. 5 is a schematic structural diagram of a limiting component according to the present utility model.

Fig. 6 is a schematic diagram of a connection structure of a limiting plate and a fixing block according to the present utility model.

Reference numerals illustrate: 1. a body assembly; 11. a base; 12. climbing a pole; 13. a hook; 2. a drive assembly; 21. a handle; 22. a driving plate; 23. a connecting plate; 24. a clamping plate; 3. an upper connection assembly; 31. a first connection block; 32. a first limiting hole; 33. a fixed block; 34. a first hinge base; 35. a first frame; 36. a first positioning hole; 37. a bearing seat; 38. positioning columns; 39. a first latch; 391. a first pin body; 392. a first spring; 393. an inclined part I; 4. a lower connection assembly; 41. a second connection block; 42. a second frame; 43. a second positioning hole; 44. a second limiting hole; 45. the second hinge seat; 46. a second latch; 461. a second pin body; 462. a second spring; 463. an inclined part II; 5. a limit component; 51. a limiting plate; 52. a first wedge block; 53. a second wedge block; 54. a limit rod; 55. a positioning groove; 56. and a third spring.

Detailed Description

It should be noted that, without conflict, the embodiments and features of the embodiments in the present application may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

Referring to fig. 1-6, the present utility model provides the following technical solutions:

example 1

Referring to fig. 1, a mechanical jack, including main part subassembly 1, main part subassembly 1 includes base 11, insert and establish at the inside pole 12 of climbing of base 11 and install the couple 13 at pole 12 top, the through-hole has evenly been seted up to pole 12's lateral wall, go up coupling assembling 3 and lower coupling assembling 4 all overlaps and establish at pole 12's lateral wall, because the jack bearing capacity is great, and the bearing capacity is not only the ascending power of vertical direction, current base 11 is spliced by bottom plate and support riser, and be connected through welded mode at the splice point, welding seam and the cracked condition of solder joint appear in welded structure, base 11 in this device is integrative casting shaping structure, this setting improves the intensity and the stability of base 11, avoid the solder joint fracture, pole 12 and couple 13 are used for prescribing a limit to the jacking stroke of jack.

Referring to fig. 1 and 2, the outer side wall of the main body component 1 is sleeved with an upper connecting component 3 and a lower connecting component 4, one side of the upper connecting component 3 and one side of the lower connecting component 4 are connected with a driving component 2, the driving component 2 comprises a handle 21 arranged on one side of a climbing pole 12, a driving plate 22 integrally formed at the bottom of the handle 21 and a connecting plate 23 hinged to the middle of the driving plate 22, the bottom of the connecting plate 23 is hinged to one side of the lower connecting component 4, the bottom of the driving plate 22 is in an arc-shaped arrangement and hinged to one side of the upper connecting component 3, one end of the driving plate 22, which is close to the climbing pole 12, is connected with a clamping plate 24, and the handle 21 and the driving plate 22 on the driving component 2 are matched into an integral structure, so that the connection stability of the handle 21 and the driving plate 22 is increased.

When the handle 21 is in the vertical state, the clamping plate 24 is clamped on the climbing rod 12, thereby playing a role of accommodating and fixing the handle 21, the driving component 2 is used for driving the climbing or descending of the upper connecting component 3 and the lower connecting component 4, namely when climbing is needed, firstly, the connecting point of the connecting plate 23 and the driving plate 22 is used as a supporting point, the handle 21 drives one end of the driving plate 22 to swing downwards, the connecting point of the driving plate 22 and the upper connecting component 3 moves upwards, the upper connecting component 3 is caused to move upwards, when the handle 21 and the driving plate 22 restore to the vertical state, the supporting point is replaced to the connecting point of the driving plate 22 and the upper connecting component 3, the driving plate 22 pulls the connecting plate 23 to move upwards, so that the connecting plate 23 lifts the lower connecting component 4, and the upper connecting component 3 and the lower connecting component 4 are lifted each time, otherwise, when the climbing is needed, the connecting point of the driving plate 22 and the upper connecting component 3 is used as a supporting point, the handle 21 and the driving plate 22 swing downwards, the connecting plate 23 is pushed to move downwards integrally, the connecting plate 23 drives the lower connecting plate 4 to move downwards, when the handle 21 and the driving plate 22 restore to the vertical state, the connecting point of the connecting plate 22 is restored to the vertical state, and the climbing effect is realized.

Referring to fig. 3, the upper connecting assembly 3 includes a first connecting block 31 sleeved on the outer side wall of the crawling rod 12, a fixed block 33 and a first frame 35 connected on the front surface of the first connecting block 31, a first hinge seat 34 connected on one side of the first connecting block 31, and a bearing seat 37 connected on the other side of the first connecting block 31, wherein a first limiting hole 32 is formed in the bottom of the first connecting block 31, the crawling rod 12 is arranged in the first limiting hole 32 in a penetrating manner, the top of the driving plate 22 is hinged with the first hinge seat 34, the first connecting block 31 slides on the outer side wall of the crawling rod 12 through the first limiting hole 32, the first hinge seat 34 is hinged with the driving plate 22, and the bearing seat 37 is used for bearing a workpiece, so that the workpiece can be driven to be lifted upwards when the upper connecting assembly 3 moves upwards.

Referring to fig. 3, a first positioning hole 36 is formed in the front surface of the first frame 35, the first positioning hole 36 is communicated with the first limiting hole 32, a first plug 39 is penetrated in the first positioning hole 36, the first frame 35 and the first positioning hole 36 are used for bearing the first plug 39, and the first plug 39 is inserted into the first limiting hole 32 and one of the through holes of the climbing pole 12 through the first positioning hole 36, so that the position of the upper connecting assembly 3 is limited.

Referring to fig. 3, the first latch 39 includes a first pin body 391 penetrating through the first positioning hole 36, an inclined portion 393 formed at one end of the first pin body 391, and a first spring 392 sleeved on the outer side wall of the first pin body 391, wherein the inclined portion 393 is located at one end of the first pin body 391 near the first connecting block 31 and is inserted into a through hole formed in the outer side wall of the climbing pole 12, two ends of the first spring 392 are respectively attached to the outer wall of the first connecting block 31 and the inner wall of the first frame 35, when the first connecting block 31 moves in position, the first connecting block 31 drives the first frame 35 and the first latch 39 to integrally move, and the inclined portion 393 at the end of the first pin body 391 slides on the through hole, so that the first pin body 391 slides out from the through hole and the first spring 392 is in a pressed state, and when the first connecting block 31 moves to a proper height, the elastic force of the first spring 392 pushes the first pin body 391 to stretch into one of the through holes of the climbing pole 12 again.

Referring to fig. 1 and 4, the lower connecting assembly 4 includes a second connecting block 41 sleeved on the outer side wall of the pole 12, a second frame 42 connected to the front surface of the second connecting block 41, and a second hinge seat 45 disposed on one side of the second connecting block 41 close to the driving assembly 2, wherein a second limiting hole 44 is formed in the top of the second connecting block 41, the pole 12 is threaded through the inside of the second limiting hole 44, the bottom of the connecting plate 23 is hinged to the second hinge seat 45, the second connecting block 41 is sleeved outside the pole 12 through a second positioning hole 43, and the second hinge seat 45 is hinged to the connecting plate 23.

The front surface of second frame 42 has seted up second locating hole 43, second locating hole 43 and the setting of link up of second spacing hole 44, the top of second frame 42 is provided with second bolt 46, including second spring 462, second spring 462 wears to locate the inside of second locating hole 43, the inclined part second 463 has been seted up to the one end that second connecting block 41 is close to second pin 461, the lateral wall cover of second pin 461 is equipped with second spring 462, the both ends of second spring 462 laminate respectively on the inner wall of second locating hole 43 and the outer wall of second connecting block 41, second locating hole 43 and second frame 42 cooperate and are used for carrying out spacing to second bolt 46, second pin 461 inserts the inside of one of them through second locating hole 44 and on the pole-climbing 12 through second locating hole 43, thereby realize the positioning effect to lower coupling assembling 4, when coupling assembling 4 position down, the lateral wall of pole-climbing 12 is gone out to second connecting block 41, inclined part second 463 at the end of second pin 461 slides in the inside of through-hole, cause second pin 461 to follow the through-hole and push out and to the second pin 461 to the inside of second coupling assembling 4 when the second spring is high to the second pin 43 is adjusted to the proper position, thereby realize the position is adjusted to the second spring position is passed through to the second spring 43 to the inside of one of the second connecting block 4.

Referring to fig. 1, 5-6, the front surface of the upper connecting component 3 is provided with the limiting component 5, the limiting component 5 comprises a limiting plate 51, the front surface of the limiting plate 51 is provided with a positioning groove 55, the fixing block 33 is inserted into the positioning groove 55, a third spring 56 is connected between the bottom of the fixing block 33 and the inner wall of the positioning groove 55, the front surface of the limiting plate 51 is vertically arranged with a first wedge-shaped block 52 and a second wedge-shaped block 53, the inclined surfaces of the first wedge-shaped block 52 and the second wedge-shaped block 53 are downwards arranged, the front surface of the first connecting block 31 is connected with a positioning column 38, the end part of the positioning column 38 is hinged with a limiting rod 54, the limiting rod 54 is positioned on the front surface of the limiting plate 51, the limiting rod 54 is attached to the inner wall of the limiting plate 51, the limiting component 5 can move upwards along with the upper connecting component 3, the second wedge-shaped block 53 is used for controlling the distance of one through hole each time upwards of the lower connecting component 4, when the upper connecting component 3 needs to move downwards, the limiting rod 54 swings downwards, the elastic force of the third spring 56 pushes the limiting plate 51 downwards, the first wedge-shaped block 52 and the second wedge-shaped block 53 are downwards, the first wedge-shaped block 52 and the first wedge-shaped block 53 are respectively attached to the first wedge-shaped block 39 and the second wedge-shaped block 46 and the lower plug 46 are respectively limited by the first plug 46 and the lower connecting component 46, and the first plug 4 can only be attached to the lower and the lower plug 4, and the upper and the lower plug 4 can be switched to the lower and limited, and the lower connector 4, and the purposes, and can be limited.

Specifically, the jack is placed at the station, the bearing seat 37 is attached to the bottom of the position where the workpiece is to be lifted, the driving component 2 is used for driving and climbing the bearing seat 37 and the upper connecting component 3 where the bearing seat 37 is located, the handle 21 and the driving plate 22 on the driving component 2 are matched into an integrated structure, the arrangement increases the connection stability of the handle 21 and the driving plate 22, as the handle 21 and the driving plate 22 are pressed down to enable the lower connecting component 4 to swing downwards, the lower connecting component 4 is in a stable state at the moment, therefore, the lower connecting component 4 applies a supporting force to the driving plate 22 through the connecting plate 23, the driving plate 22 swings along the supporting point, the hinge point of the driving plate 22 and the first hinge block swings upwards, so that the first connecting block 31 slides upwards outside the climbing rod 12, the first pin 391 inserted in the through hole of the climbing rod 12 is extruded, the inclined part 393 slides along the inner wall of the through hole, the first spring 392 is extruded, the first pin 391 moves out of the through hole, the first connecting block 31 is in a free state and moves upwards under the thrust, when the first pin 391 moves to the first pin 391 to the through hole, the first pin 391 is pushed to the position, the first pin 391 is continuously connected to the position of the workpiece 3, the workpiece is continuously lifted by the operator, the workpiece is continuously lifted up by the connecting component 3,

when the upper connecting component 3 climbs upwards by the distance of a through hole on the climbing rod 12, the handle 21 and the driving plate 22 are in a downward pressing state, when the handle 21 and the driving plate 22 swing to a vertical state, the supporting point of the driving plate 22 is changed, the hinge point of the driving plate 22 and the first hinge seat 34 is used as a supporting point, the hinge point of the driving plate 22 and the connecting plate 23 moves upwards to lift, the whole connecting plate 23 moves upwards, the bottom of the connecting plate 23 pulls the second hinge seat 45 on the second connecting block 41, the second hinge seat 45 drives the second connecting block 41 to move upwards, at the moment, the second bolt 46 is extruded, the structure and the working principle of the second bolt 46 and the first bolt 39 are the same, and the second bolt 46 is caused to move upwards by the distance of a through hole, so that the upper connecting component 3 and the lower connecting component 4 move upwards to climb.

The limiting component 5 can move upwards along with the upper connecting component 3, the second wedge-shaped block 53 is used for controlling the distance of one through hole at each time when the lower connecting component 4 moves upwards, when the upper connecting component 3 needs to move downwards, the limiting rod 54 swings downwards, the elastic force of the third spring 56 pushes the limiting plate 51 to move downwards, the first wedge-shaped block 52 and the second wedge-shaped block 53 are respectively attached to the first bolt 39 and the second bolt 46 to limit, so that the first bolt 39 and the second bolt 46 can only move downwards, the handle 21 and the driving plate 22 swing downwards, the hinge point of the driving plate 22 and the first hinge seat 34 serves as a supporting point, the hinge point of the driving plate 22 and the connecting plate 23 moves downwards to descend, the second bolt 46 is removed from the through hole and is pushed downwards by the third spring 56 to move downwards by the distance of one through hole, then the hinge point of the connecting plate 23 and the driving plate 22 serves as a supporting point, the arc-shaped position of the driving plate 22 pushes the first hinge seat 34 and the upper connecting component 3 to move downwards integrally by the distance of one through hole, and accordingly the reciprocating purpose of lowering the upper connecting component 3 and the lower connecting component 4 is achieved.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Claims (6)

1. A mechanical jack, characterized in that: the device comprises a main body assembly (1), an upper connecting assembly (3) and a lower connecting assembly (4) which are sleeved on the outer side wall of the main body assembly (1), a driving assembly (2) hinged on one side of the upper connecting assembly (3) and one side of the lower connecting assembly (4), and a limiting assembly (5) arranged on the front surface of the upper connecting assembly (3);

wherein, main part subassembly (1) include base (11), insert establish at inside pole (12) of base (11) and install couple (13) at pole (12) top, the through-hole has evenly been seted up to the lateral wall of pole (12), go up coupling assembling (3) and lower coupling assembling (4) all overlap and establish the lateral wall at pole (12), drive assembly (2) are including setting up handle (21) in pole (12) one side, integrated into one piece in drive plate (22) of handle (21) bottom and articulated in connecting plate (23) at drive plate (22) middle part, the bottom of connecting plate (23) articulates in one side of coupling assembling (4) down, the bottom of drive plate (22) is the arc setting and articulates one side that is used for last coupling assembling (3), the one end that drive plate (22) is close to pole (12) is connected with cardboard (24).

2. A mechanical jack according to claim 1, wherein: the upper connecting assembly (3) comprises a first connecting block (31) sleeved on the outer side wall of the climbing pole (12), a fixed block (33) and a first frame (35) which are connected to the front surface of the first connecting block (31), a first hinging seat (34) connected to one side of the first connecting block (31) and a bearing seat (37) connected to the other side of the first connecting block (31);

the climbing pole (12) is arranged in the first limiting hole (32) in a penetrating mode, the top of the driving plate (22) is hinged to the first hinging seat (34), a first positioning hole (36) is formed in the front surface of the first frame (35), the first positioning hole (36) is communicated with the first limiting hole (32), and a first bolt (39) is arranged in the first positioning hole (36) in a penetrating mode.

3. A mechanical jack according to claim 2, wherein: the first bolt (39) is including wearing to locate inside first round pin body (391) of first locating hole (36), offer in the inclined part one (393) of first round pin body (391) one end and cover locate first spring (392) of first round pin body (391) lateral wall, inclined part one (393) are located the one end that first round pin body (391) is close to first connecting block (31) and insert the inside of locating a through-hole of pole-climbing (12) lateral wall, the both ends of first spring (392) are laminated with the outer wall of first connecting block (31) and first frame (35) inner wall respectively.

4. A mechanical jack according to claim 2, wherein: the lower connecting assembly (4) comprises a second connecting block (41) sleeved on the outer side wall of the climbing pole (12), a second frame (42) connected to the front surface of the second connecting block (41) and a second hinging seat (45) arranged on one side, close to the driving assembly (2), of the second connecting block (41);

wherein, second spacing hole (44) have been seted up at the top of second connecting block (41), the inside in second spacing hole (44) is worn to locate by pole-climbing (12), the bottom of connecting plate (23) articulates mutually with second articulated seat (45), second locating hole (43) have been seted up to the front surface of second frame (42), second locating hole (43) link up with second spacing hole (44) and set up, the top of second frame (42) is provided with second bolt (46), second bolt (46) include second round pin body (461), the inside in second locating hole (43) is worn to locate by second round pin body (461), slope two (463) have been seted up near the one end of second connecting block (41) to second round pin body (461), the lateral wall cover of second round pin body (461) is equipped with second spring (462), the both ends of second spring (462) laminate on the inner wall and the connecting block of second connecting block (41) of second locating hole (43) respectively.

5. A mechanical jack according to claim 2, wherein: spacing subassembly (5) are including limiting plate (51), constant head tank (55) have been seted up to the front surface of limiting plate (51), inside locating slot (55) is inserted to fixed block (33), be connected with third spring (56) between the bottom of fixed block (33) and the inner wall of constant head tank (55), the front surface vertical range of limiting plate (51) is provided with first wedge (52) and second wedge (53), the inclined plane of first wedge (52) and second wedge (53) sets up downwards.

6. A mechanical jack according to claim 5, wherein: the front surface of first linkage piece (31) is connected with reference column (38), the tip of reference column (38) articulates and is provided with gag lever post (54), gag lever post (54) are located the front surface of limiting plate (51), just gag lever post (54) are laminated with the inner wall of limiting plate (51).